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Liebert® PDX
80-165 kW Indoor Room Cooling Units
with Modulating Capacity
Econophase Version - 50 Hz
User Manual
English, Cod. 265133, rev. 29.08.2019
Use only with:
● Liebert® MC, EconoPhase Version
● Liebert® EconoPhase, Pumped Refrigerant Module
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Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This document, written in English, is the original version.
Conventions
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.
NOTICE indicates a property damage message.
NOTICE
The manual is retained for the entire service life of the machine;
The user reads the manual carefully before carrying out any operations on the machine;
The unit control must be used exclusively for the purpose which it is intended for; the manufacturer
takes no liabil­ity in case of an incorrect use or a modification of the unit control
WARNING
This manual was prepared to enable the end user to carry out only the operation that can be done with
the panels closed.
Only qualified personnel are allowed to carry out operations that require opening of the door or the
equipment panels. The panel key supplied with the unit must be kept by a person responsible for the
maintenance.
CAUTION
Before proceeding with installation, read all instructions, verify that all parts are included and check the
nameplate to make sure the voltage matches available utility power.
For identification of the unit (model and serial no.) in case of the necessity for assistance or spare parts,
locate the identification label on the outside of the unit.
WARNING
This unit operates and restarts automatically.
If the electrical connection is live, there are residual risks: electric shock, burns, moving parts, automatic
restarting from the remote control.
•
Before any operation that requires opening of the door or the equipment panels (maintenance,
cleaning, etc.), disconnect the unit from the power supply.
The ON/OFF switch on the control panel does not isolate the power from the unit, even in the “unit off”
mode. To cut off the power supply, open the insulation device (main switch) which is positioned on the
electrical panel cover, behind the door on the left:
MAIN SWITCH
Unscrew the door and open it to access the main switch.
•
After opening the door pay attention to the cable and components still energized.
•
Open the main switch to cut off the power before removing any protective cover.
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WARNING
The supply cable of the main switch contains live high-voltage.
•
The manufacturer highly recommends that the final customer installs on site an external main switch,
easy to reach and to facilitate a quick and easy shutdown enabling the power of the unit to be cut off.
Refer to the unit electrical schematics for the installation. Follow all local codes.
CAUTION
If the unit door is open while the fans are operating, the airflow may suddenly slam the door closed.
There is a risk of being hit by the door and hands being crushed.
•
Before opening the door, switch off the unit using the local or remote control panel or the external
main switch (if installed).
If small objects are left loose in the fans bay after any maintenance operation, it may result in the object
ejection at the fans start-up.
There is a risk of being hit by small objects.
•
Install all protection panels or a grid before starting up the fans after any maintenance operation.
Position the floor panels also below the unit with the fans below the floor.
WARNING
If the internal compartments are open immediately after the machine has been switched off, there might
be some hazards related to:
•
Components still at high temperature: electrical heaters, humidifier and steam distributor, hot water
piping.
•
Rotating elements (fan impellers, they might continue to rotate for a while by inertia)
•
Sharp edges, splinters and exposed fasteners
Pay attention to the warning labels on the unit.
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Attention: data relevant to the unit supplied is indicated
on the inboard label (see the blank facsimile below).
Data in the manual is referred to standard conditions
and can be modified without any advance notice.
28
POS.
31
30
32
1
4
7
10
Evaporator fan Locked Rotor Ampere [A]
6
Evaporator fan quantity
55
66
9
Condenser fan quantity
10
Electrical heating Ampere
8
99
11
Electrical heating steps
12
Humidifier Ampere
13
Steam production capacity
14
Max. unit AC Ampere
15
Max. unit DC Ampere
16
Rated peak withstand current
17
Rated short-time current
18
Refrigerant type
19
High pressure switch Stop
20
High pressure switch Restart
21
Low pressure switch Stop
22
Low pressure switch Restart
23
Min. room operation temperature
24
Max. room operation temperature
25
Min. room operation humidity
26
Max. room operation humidity
27
Max. refrigeration circuit pressure
28
Manufacturing plant
29
Manufacturing date
30
Model
31
Serial number
32
Power input
17
17
24
24
25
Evaporator fan Full Load Ampere [A]
5
Condenser fan Locked Rotor Ampere [A]
22
22
23
4
Condenser fan Full Load Ampere [A]
20
20
21
Compressor quantity
8
18
19
Compressor Locked Rotor Ampere [A]
3
7
16
16
15
15
2
33
13
13
14
Compressor Full Load Ampere [A]
22
11
12
DESCRIPTION
1
26
26
27
29
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Model Nomenclature / Digit Numbers
1
2
3
4
5
6
7
8
9
10
11
12
13
P X
Digit 1 and 2
PX Liebert® PDX
Digit 6
Air Discharge
D Downflow Up
E Downflow Down
14
15
16
17
18
19
20
21
22
Digit 7
System Type
P Air Cooled + predisposition for
pumped refrigerant economizer
Digit 3, 4 and 5
Unit Model
Digit 8 - Airflow
Digit 16 - Colour
L = Premium Fan Module
1 = Black Vertiv RAL 7021
Digit 9 - Main Power Supply
Digit 17 - High Voltage Option
3 = Single 400V / 3ph / 50 Hz + N
X = Dual Circuit Digital Scroll R410A with EEV
T = Dual Power Supply parallel + Magnetic circuit breaker for 10A
three phases
U = Dual Power Supply Alternate with ATS + Magnetic circuit
breaker for 10A three phases
Digit 11 - Humidification
Digit 18 - Package Option
0 = None
H = Infrared Humidifier
U = Ultra Sonic Humidifier
S = Electrode Humidifier
Digit 19 - Monitoring
Digit 10 - Cooling System
Digit 12 - Microprocessor Control
2 = Inner Display only T sensor
3 = Inner Display TH sensor
U = Small Cold fire display T sensor
B = Small Cold fire display TH sensor
C = Large Cold fire display T sensor
D = Large Cold fire display TH sensor
Digit 13 - Heating & Re- Heating
0 = None
1 = Electric heating Std Capacity
2 = Electric heating High Capacity
Digit 14 - Air Filter Efficiency
1 = F5 (EU5) dust spot
3 = F5 (EU5) dust spot + Clogged Filter
H = Predisposition for damper
L = Predisposition for plenum installation
N = No IS Housing
0 = No Card
C = Sitescan Monitoring through INTELLISLOT IS-485EXI
P = MODBUS, BACnet, SNMP, Web through IS-UNITY card
Digit 20 - Sensors
0 = None
Digit 21 - Packaging
P = PLP And Pallet
C = PLP and Wooden Crate
S = Seaworthy
Digit 22 - Special Requirements
A = Standard Vertiv
X = Special Vertiv
Digit 15 - Condensing Control
1 = Air Cooled or Water cooled with Standard Pressure, 2 way MBV
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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1 - Liebert® PDX EconoPhase
System description
1.1 - Liebert® PDX EconoPhase System
Liebert® PDX EconoPhase System is designed to provide
precision air conditioning to computer racks in a data center or
computer room as efficiently and effectively as possible.
A Liebert® PDX EconoPhase System is composed of:
•
Liebert® PDX EconoPhase version - High Efficiency, Digital
Scroll, floor-mounted indoor unit
•
Liebert® MC™ Condenser EconoPhase version - Air-cooled
microchannel condenser, premium version
•
Liebert® PDX EconoPhase - Liebert® PDX EconoPhase
pump refrigerant module
The Liebert® PDX EconoPhase is an add-on module for use with an
air-cooled Liebert® PDX system. The Liebert® PDX EconoPhase
will allow the system to switch to Liebert® PDX EconoPhase
operation when the outdoor temperature is low enough to provide
the required temperature difference between the inside air and the
outside air, providing significant energy savings because there is
no need to operate the compressor. At lower temperatures, the
system switches one or both circuits from Compressor Mode to
Pump Mode. The pump consumes roughly 1/10th of the power
consumed by the compressor.
The Liebert® PDX EconoPhase system maintains this energy
efficiency by employing the heat absorption properties of a liquid
(pumped refrigerant) through a phase change. Refrigerant is
pumped as a liquid, becomes a gas within the Liebert® PDX
evaporator and then is returned to the Liebert® MC where it
condenses to a liquid. The subcooled liquid refrigerant from the
condenser is then run directly into the Liebert® PDX EconoPhase
pumps and is circulated back to the Liebert® PDX unit (see Figure
1). The system will operate as a typical air-cooled direct expansion
system when outdoor ambient conditions are unfavorable
to EconoPhase operation. The pumps in the Liebert® PDX
EconoPhase pump module are turned off and bypassed during
compressor operation.
Fig.1 - Pressure enthalpy diagram, pumped refrigerant Liebert® EconoPhase
Liquid
L iquid/V a por Mix
V a por
Condenser (DX Mode)
Pressure
Indoor Unit
Condenser (Pump Mode)
Tradtional Vapor Compression Cycle
EconoPhase Cycle
Enthalpy
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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1.2 - Liebert® PDX EconoPhase version
The Liebert® PDX is a full- featured precision air conditioner
intended for data centers, network closets, technological
rooms (laboratories, metrological rooms, museums), new and
existing constructions, raised and non- raised floors, moderate
to high density heat loads, also in combination with cold aisle
containments (up to 10 kW/Rack). It provides all the necessary
functions of a standard precision air conditioner, including
cooling, heating, humidification, dehumidification, air filtration,
condensate management, temperature control, alarm functions
and data communications. Thanks to Copeland’s Digital Scroll and
electronic expansion valve availability, Liebert® PDX can achieve
a continuous spectrum of capacity output, ensuring a very tight and
precise control on room temperature. Liebert® PDX can rapidly
change from one capacity duty to another. Therefore it controls
environmental parameters even working with swiftly changing heat
loads. In Digital Scroll Cooling system depending on the unit size
the modulating capacity range is between 15% and 100% of the
nominal capacity. The compressor can drop down to 10%, but the
system will decrease in efficiency.
Thanks to the capacity modulation we can reduce the starting
and stopping of the compressor which uses a lot of power and
puts a great amount of stress on the components; therefore we
Downflow Up
2
can enhance efficiency and life of the system. With the Liebert®
PDX range we are able to manage unexpected very high ambient
temperatures, maintaining the system active, reducing HP alarm
and troublesome stops of the unit. In fact, when the discharge
pressure reaches the limit value, the compressor capacity is limited
to a fraction of the actual request, in this way restricting the heat
rejection and allowing the system running without interruptions.
If, after a defined time, the condensing pressure comes back
within the limit, the capacity will be modulated in the usual way.
Reliability of the Liebert® PDX is also maximized, thanks to the
fewer system parts and simple electronic controls which reduces
the unit maintenance.
Digital Scroll motor runs at a constant speed throughout the
operating range.
This unique feature increases the applicability of the Liebert®
PDX units into technological rooms, as it eliminates the need
for expensive electromagnetic suppression electronics require
to ensure electromagnetic compatibility. The Digital function
maintains the maximum refrigerant velocity through the pipes. As a
result of these reasons, Liebert® PDX units do not need oil return
components. Liebert® PDX is designed on modular concept.
The Liebert® PDX is supplied as a single unit (height 1970 mm),
where coil and fan sections are connected. The units are available
Downflow Down
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1.3 - Liebert MC™ EconoPhase Version
The Liebert® MC air-cooled microchannel condenser is a lowprofile, direct-drive propeller fan-type air-cooled unit suitable for
mounting outdoors. It provides heat rejection for either one or two
separate refrigeration circuits, matches the heat rejection capacity
corresponding with the outdoor ambient temperature and with each
corresponding compressor heat rejection requirements.
Constructed with an aluminum cabinet, galvanized steel frame
and microchannel coil, the unit is quiet and corrosion resistant.
The condenser is quickly and easily installed because all internal
wiring is completed at the factory with only electrical connections
and communications connections to be made at the job site. All
electrical connections and controls are enclosed in an integral
weatherproof section of the condenser.
The Liebert® EconoPhase pumped refrigerant system will always
use the premium version condenser.
In EconoPhase operation, the premium control board uses
inputs from the indoor unit, condenser refrigerant temperatures
and ambient temperatures to modulate the EC fan motor speed
from 0 to 100% RPM, maintaining the refrigerant temperature
setpoint. The control system provides temperature control for
outdoor ambient as low as -35°C in pumped refrigerant Liebert®
EconoPhase operation.
1.4 - Liebert® EconoPhase Pump Refrigerant Module
The Liebert® EconoPhase is an option for a Liebert® PDX
EconoPhase Version air-cooled system. The Liebert® EconoPhase
allows an air-cooled direct expansion system to switch from vapor
compression operation to pumped refrigerant operation when
the outdoor temperature is low enough to provide the required
temperature difference between the inside air and the outside air.
are found throughout this manual and the manual of Liebert®
EconoPhase Pump Refrigerant Module.
•
Liebert EconoPhase Operation - Liebert® EconoPhase
operation is possible when the outdoor temperature is low
enough to provide the required temperature difference
between the indoor air and the outside air. This mode turns the
compressors Off and turns the Liebert® EconoPhase pumps
On.
•
Refrigerant Pumping - During Liebert® EconoPhase
operation, the refrigerant is pumped around the air-cooled
loop instead of going through the vapor compression cycle.
System pressures will vary significantly depending on whether
the system is operating in standard aircooled mode or in
Liebert® EconoPhase operation.
•
Energy Savings - The coefficient of performance of the
system increases significantly during the EconoPhase
operation which results in significant energy savings for the
user.
•
EEV - The system uses an electronic expansion valve during
both direct expansion and EconoPhase operation. The EEV
results in energy savings and helps the pump maintain proper
differential during EconoPhase operation.
•
Piping - The condenser piping is larger than what is typically
specified for Liebert® air-cooled Precision Cooling systems.
The pipe sizing still allows oil return to the compressor
and also allows for efficient operation in both modes of
operation. All field piped lines must be insulated because the
fluid temperatures can be well below the dew point during
EconoPhase operation. All outdoor insulation must be UV
rated and rated for outdoor use.
•
Unit/Module Communications - A CANbus connection links
the Liebert PDX and the air-cooled condenser to achieve the
most efficient operation as well as the condenser and the
Liebert® EconoPhase module.
Fig. 2 - Liebert EconoPhase module
1.6 - Operating Modes
Each circuit on a system combining a Liebert® EconoPhase,
Liebert DSE and Liebert MC has six distinct operating modes:
•
•
•
•
•
•
1.5 Standard Air-Cooled System vs. Liebert® PDX
EconoPhase System
Idling with compressor and pumps Off
Startup
Compressor operation
Compressor-to-pump changeover
Pump operation
Pump-to-compressor changeover
A circuit will run most of the time in either compressor or pump
operation mode. These modes both efficiently remove heat from
the conditioned space and reject it via the air-cooled condenser.
The flow paths during each mode of operation are detailed in
Figures 3 and 4.
A couple of differences to note between Compressor Mode and
Liebert® EconoPhase operation:
• The unit does not dehumidify in Liebert® EconoPhase operation.
If dehumidification is desired, Liebert® EconoPhase operation
must be disabled.
• Bubbles may be seen in the site glass in the indoor unit when
the system is in Liebert® EconoPhase operation. This does not
necessarily mean the system is low on charge.
There are differences between the standard air-cooled system and
a system designed with the Liebert® EconoPhase. The user must
be aware of these differences to achieve the best operation. This
section summarizes the differences; more detailed explanations
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Fig.3 - Compressorized operation flow path
Check Valve
Condenser
Solenoid Valve
Pump
Check Valve
Electronic
Expansion
Valve
Check
Valve
Compressor
Evaporator
Fig.4 - Pump operation flow path
Check Valve
Condenser
Solenoid
Valve
Pump
Check Valve
Electronic
Expansion
Valve
Check
Valve
Evaporator
4
Compressor
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1.7 - Module Communications
The Liebert® PDX (room unit), Liebert MC™ (microchannel
condenser) and Liebert® EconoPhase (Pumped Refrigerant
Economizer) require communication when combined into a system.
This is done through a CANbus communication interface. A CANbus
cable must be connected from the Liebert® PDX at the designated
terminal(s) to TB49 on the Liebert® MC condenser board. If there is
an additional condenser, TB50 of the first condenser will continue
out to TB49 on the second condenser.
In a system equipped with a Liebert® EconoPhase, the CANbus
cable must be connected from TB50 on the last condenser to TB49
on the Liebert® EconoPhase CANbus terminal block.
The two devices that are connected at the ends of the CANbus will
require termination to be set by jumper or plug. One end will be at
the last outdoor device in the connection chain; the other end of the
CANbus is either in the indoor unit or at a remote sensor. To
terminate, place a jumper on J6 Pins 1 and 2 on the Liebert® MC
condenser or Liebert® EconoPhase board. For other Liebert®
iCOM boards directly associated with the indoor unit, terminate by
placing a jumper on P78 Pins 2 and 3.
See Fig. 5 for CANbus connections, jumper and DIP switch settings.
•
Length Restrictions
•
The indoor Liebert® PDX can be no more than 100m
from the condenser. The CAN communication cable can
be longer, but the total length should not exceed 150m
between the indoor Liebert® PDX unit and all outdoor
equipment.
•
•
•
Cable Type
•
Conductors-22-18AWG stranded, tinned copper
•
Twisted pair (one pair is required for connection)
•
Braided shield or foil shield with drain wire
•
Low capacitance (<=15pF/ft)
•
Cat5e or similar
•
UL approved temperature rated to 75°C (167°F)
•
UL approved voltage rated to 300V
•
UV - and moisture - resistant if not run in conduit
•
Plenum rated-NEC type CMP, if required by national or
local codes
High Voltage Restrictions
•
Do not run communications cable with high voltage cable.
•
When routing cable, avoid laying, fastening or coiling
near or on high voltage wiring, conduit, or light ballasts.
Communication signals in equipment may be disturbed.
•
Keep communications cable away from other electrical
noise sources.
Environmental and Safety
•
Vertiv® recommends routing cable inside conduit where
the cable exits the building to outdoor units, between
outdoor units and any other location where environmental
conditions could degrade the cable’s integrity.
•
Follow all national and local codes regarding cable
routing, ratings, etc.
Fig.5 - CANbus connections
TB50
TB49
TB50
TB50
Liebert
EconoPhase
Circuit 1
On
1
J6
1 2 3 4 5 6 7 8
3
Liebert
EconoPhase
Circuit 2
CAN
On
1
J6
3
1 2 3 4 5 6 7 8
CAN
TB49
TB49
Factory-Installed CANbus Cable
Field-Installed CANbus Cable
TB50
TB49
Liebert
EconoPhase
CANbus Terminal Block
Liebert
MC Unit
Circuit 2
On
1
J6
3
1 2 3 4 5 6 7 8
CAN
On
P67
TB50
Indoor Unit With
Liebert iCOM
TB49
Liebert
MC Unit
Circuit 1
Connect wire 3 to PIN1and wire 4 to PIN3
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
1
J6
3
1 2 3 4 5 6 7 8
CAN
5
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1.8 - Description of Liebert® EconoPhase Operation
•
The Liebert® EconoPhase unit enables the Liebert® PDX system
to operate in any of three modes to control temperature, depending
on the outdoor temperature and the load.
•
Compressor Mode
•
Pump Mode
•
Mixed Mode
When the outdoor temperature becomes low enough to provide
the required temperature difference between the inside air and
the outside air, there is no need to compress the refrigerant to a
higher pressure/temperature. When the outdoor temperature is
low enough, the system switches from Compressor Mode to Pump
Mode or to Mixed Mode.
•
Compressor Mode: All available compressors may be used
to maintain the control temperature. All the available Liebert®
EconoPhase pumps are Off. The control will typically run in
this mode when the load and temperatures are such that full
or partial Liebert® EconoPhase operation is not possible, or
because certain pumps have experienced alarms.
•
Pump Mode: All of the available pumps may be used to
maintain the Control Temperature. All the compressors in the
system are Off. The control will typically run in this mode when
load and temperatures permit.
Mixed Mode: The pump in Circuit 1 is On and the compressor(s)
in Circuit 2 is On. Some systems may not have Mixed Mode
capability, depending on the manufacture date. Contact the
factory to inquire about a software upgrade.
1.8.1 EconoPhase Control
EconoPhase operation has three main controlled parameters:
•
return or supply air temperature control
•
refrigerant temperature
•
pump pressure differential (outlet pressure - inlet pressure)
Room Temperature
When the system is in Pump Mode, the room temperature is
controlled by modulating the pump speed with a variable frequency
drive. The load requirement will determine if one pump or two
are needed. Figure 8 shows the sequence of operation in terms
of pump speed. Minimum speed is 45% and maximum speed is
100%. See Table 2 for more detail on the events shown in Figure 8
and the conditions that trigger action.
The pump startup routine calls for a start speed of 80%. The pump
will run for up to 60 seconds at 80% with the EEV at 60% while
waiting on the pump pressure differential to reach at least 0.83 bar
to indicate that flow has been established. If the pump establishes
flow, the speed will change from 80% to the required control speed
as shown on the curves in Figure 6.
Fig.6 - Two-circuit pump control
Pump y
Speed
E
C
Maximum
Pump
Speed
I
Pump 1
L
D
Minimum
Pump
Speed
B
0
G
J
A
20%
Pump 2
H
K
40%
F
55%
75%
100%
x
Capacity
Pump 1 under manual control
Pump 1 under PID control
Pump 2 under manual control
Pump 2 under PID control
6
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Tab. 1 - Description of events and actions in Figure 6
Event
Condition to Trigger Action
B to A
Pump 2 Off; and (Pump 1 at minimum speed for 60 sec.; and
Delta T [indoor air temperature - setpoint] < -1.7°C
Pump 1 turns Off; Pump 2 remains Off
A to B
Both Pump 1 and Pump 2 Off; and Delta T > 0°C
Pump 1 turns On and runs on PID; Pump 2 remains
Off
F to G
Pump 2 Off; and Pump 1 at maximum speed for 60 seconds;
and Delta T > -0.6°C
Pump 2 turns On at starting speed, then goes to
minimum speed immediately. Pump 1 continues to
run on PID
At E and H
upward
Pump 1 at maximum speed; and Pump 2 at minimum speed;
and Delta T > -0.6°C
Pump 1 runs at maximum speed, while Pump 2 runs
on PID
At E and H
downward
Pump 1 at maximum speed; and Pump 2 at minimum speed;
and Delta T < -0.6°C
Pump 1 runs on PID, while Pump 2 runs at minimum
speed
J to K
Pump 2 Early
Startup
Action
Both Pump 1 and Pump 2 at minimum speed for 60 sec.; and Pump 2 turns Off, while Pump 1 runs at minimum
Delta T < -0.6°C
speed
Pump 2 Off; and Delta T > 1.1°C
As seen in the last row of Table 1, an exception to the “F to G”
event, in which Pump 2 starts if Pump 1 is at its maximum speed
for 60 seconds and Delta T (Room Air Temperature - Setpoint) is >
0.6°C, is that Pump 2 will start when Delta T > 1.1°C even if Pump
1 is not at its maximum speed. In that event, Pump 2 starts via the
startup routine and then goes immediately to its minimum position.
In the case of a transition from Compressor Mode to Pump Mode,
the pumps will be given initial speeds based on the call for cooling
at the time of transition. The pumps will go to this initial speed after
the startup routine is completed. This will mean that, depending
on the load, both pumps will start immediately at the transition to
Pump Mode from Compressor Mode.
When the system is in Mixed Mode, the room temperature is
controlled either by modulating the digital compressor(s) on Circuit
2 with the pump on Circuit 1 at 100%, or by modulating the pump
speed on Circuit 1 with the compressor(s) operating at the minimum
digital percent.
Refrigerant Temperature
When a circuit is running in Pump Mode, the refrigerant temperature
is controlled by the condenser fan speed. When a circuit switches
from Compressor Mode to Pump Mode, the condenser fan speed
control changes from pressure control to temperature control,
with the controlled parameter being condenser outlet refrigerant
temperature.
The default setpoint on Circuit 1 is 7.2°C, while on Circuit 2 it
is 2.8°C. The condenser fan speed will modulate to provide the
respective temperature. But if the outdoor temperature is warm
enough, or if the load is high enough, the fans might be at 100%
and the actual refrigerant temperature might be above the setpoint.
In that case, the temperature will depend on the heat rejection
capability of the condenser at the given conditions.
Actual fan speed will depend on the load and the outdoor
temperature. The fan speed will be lower for a given heat load with
lower outdoor temperature in order to maintain the setpoint.
Because the refrigerant temperature could be below the dew point
inside, the indoor piping must be insulated to prevent condensation.
In addition, the outdoor piping must be insulated so that heat is not
lost to the outdoor air at very low ambient temperatures, causing
the refrigerant temperature to fall and increasing the possibility of
frost at the evaporator.
Pump Pressure Differential
The pump pressure differential must to be maintained above a
minimum for cooling and lubricating flow to be provided to the pump
motor and bearings. The differential is controlled by EEV position.
When the system switches to EconoPhase operation, the EEV
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
No action to Pump 1; turn On Pump 2 at 80% speed,
once the startup procedure is finished, step change
to minimum speed immediately
control changes from superheat control to manual control. The
Liebert® iCOM then signals the EEV to control its position based on
pump differential.
The default minimum EEV position is 50% and the maximum
is 80%. The pump differential setpoint is 20 psid. If the pump is
running at a high speed at steady state, the EEV may be at 80%
and the actual pump differential may be above 25 psid. In that case,
the EEV will stay at 80% and the differential will just be a function of
pump speed and system pressure drop.
If the pump differential drops below 5 psid continuously for 30
minutes, the system will switch to direct expansion mode for 30
minutes. The system will switch back to EconoPhase operation if
the conditions are still compatible.
1.8.2 Pump Startup Routine
When either pump attempts to start, the first attempt will be at 80%
speed. If flow is not established (as detected by pump differential being
at least 12 psi within 60 seconds), the pump will turn Off for 10 seconds
before trying again at 90% speed. If flow is still not established, the
pump will turn Off for 10 seconds before trying again at 100% speed.
If flow is not established after the 100% speed attempt, the system
will switch to DX mode for 10 minutes before attempting to start the
pumps again if the conditions are still compatible.
The second startup routine is the same as above. If the second
startup attempt is unsuccessful, the system will switch to DX mode
for 60 minutes before trying again.
The third startup routine will be the same as above. If the third
startup attempt is unsuccessful, a “Pump Startup Fail” alarm will
be displayed and EconoPhase operation will be locked out until the
user manually resets the event at the Liebert® iCOM.
1.8.3 Switch from Compressor Operation to Pump Operation
The Liebert® iCOM will run the system in the most efficient operating
mode, given the load and temperature conditions. If Mixed Mode is
available, the system will change from Compressor Mode to Mixed
Mode when partial Liebert® EconoPhase operation is possible
and from Compressor or Mixed Mode to Pump Mode when full
Liebert® EconoPhase operation is possible.
1.8.4 Switch from Pump Operation to Compressor Operation
The unit will switch from Pump Mode to Mixed Mode or Compressor
Mode when at least one of the following is true:
•
The difference between the actual controlled air temperature
and the setpoint is 75% into the Cooling Proportional Band
for 5 minutes. The default is 75%, but the percentage can be
changed at the Liebert® iCOM.
7
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NOTE
At startup and at switchover from compressor operation to pump
operation, more time is allowed to bring the temperature under control, but the temperature will never be allowed to go outside the
cooling proportional band.
1.8.5 Loop Temperatures
While the outdoor loop temperature could be close to the same
on both circuits, the indoor loop temperatures (in most cases) and
pressures in Circuit 1 will be higher than in Circuit 2 because of
the staged cooling evaporator design in the Liebert® DA125. The
Suct Ref Temp will be a function of load, return air temperature and
pump speed.
Table 2 shows some representative loop temperatures for
EconoPhase at the outdoor rating condition, 1.6°C, for several
heat load conditions and two return air conditions. System pressure
drop for a given application will affect these temperatures because
of its impact on flow rates for a given pump speed.
The Liebert® EconoPhase page on the Liebert® iCOM® display
shows Dis Ref Temp (pump outlet temperature) and Suct Ref Temp
(evaporator outlet temperature).
NOTE
The data in Table 2 is from a system tested in controlled conditions
and is for reference only.
•
•
•
•
The pump differential pressure is below 34 kPa for 30 minutes.
The refrigerant temperature leaving the pump is below -1.1°C
for 60 minutes.
The pump does not establish flow at a pump startup attempt.
Power is lost at the Liebert® EconoPhase unit.
Tab. 2 - Representative Liebert® EconoPhase loop temperatures at 1.6°C outdoor temperature
Load,
%
100
75
50
25
100
75
50
25
Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2
Outdoor
RA
Temp. Temp.
Dis Ref
Suct Ref
Suction SH
Evap Saturation
Pump Speed, %
°C
°C
Temp. °C
Temp °C
°C
Temp °C
1.6
29.4
100
60
1.11
4.4
27.7
20
-5.6
-5.2
15.5
7.4
1.6
29.4
100
46
1.11
2.7
25.5
20.5
-7.6
-2.2
15.5
4.7
1.6
29.4
64
45
7.7
2.7
28.8
23.8
0.4
2
10.7
4.2
1.6
29.4
54
Off
5
NA
28.8
NA
3.7
NA
7.5
NA
1.6
23.8
100
55
10
2.7
14.4
16.1
-16.4
-7.2
13
5.4
1.6
23.8
100
45
10.5
3.3
13.8
17.7
-16.9
-5
13.3
4.7
1.6
23.8
69
Off
7.7
NA
22.7
NA
-6
NA
11.2
NA
1.6
23.8
54
Off
5
NA
23.3
NA
-1.5
NA
7.3
NA
1.8.6 Mechanical Considerations
The Liebert® EconoPhase pump is located at the condenser
(receiver) outlet and always needs liquid at its inlet for proper
function. The lines between the receiver and the Liebert®
EconoPhase unit must be sloped down toward the Liebert®
EconoPhase unit without any traps and with minimal bends. Traps
in those lines will prevent the pump from establishing and from
maintaining flow.
8
It is equally important to pump operation that the receiver be
sufficiently above the Liebert® EconoPhase unit; refer to Figure
13 for the proper height difference.
It is also important that the circuits do not get crossed between the
indoor unit, the condenser and the Liebert® EconoPhase unit. If
they get crossed, the system will not operate correctly, either in DX
mode or in Liebert® EconoPhase operation.
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Fig.7 - Piping schematic
EconoPhase Unit
Differential
Check Valve
Factory installed
Relief Valve
Liebert MC Condenser
Check
Valve
Receiver
Solenoid Ball
Valve
Valve
Ball Valve
Hot Gas
Discharge
Includes Factory Traps
No External Trap Required
PX****P room unit
Tandem
Compressor
Differential
Check Valve
Liquid
Evaporator
Coil
Service
Valve
Oil trap every
6 m of vertical
piping
Suction
Check
Valve
Oil trap on the horizontal
discharge line
before each lift
Service
Valve
Check
Valve
Electronic
Expansion Valve
Refrigerant Piping
Field Piping
Shut-off Valve
Liquid Return
Check Valve
10 bar (145 psi)
1. Two refrigeration circuits provided. Single refrigeration circuit shown for clarity.
2. Schematic representation shown. Do not use for specific connection locations.
3. Vertical height of condenser above indoor unit shall be no greater than 18.0m.
4. All indoor and outdoor field refrigerant piping must be insulated,
12mm minimum thickness. All outdoor insulation must be UV- and ozone-resistant
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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1.9 - Operating limits
The units are designed to operate within working ranges (see Tab. 3).
These limits are referred to new machines or to those that have
been correctly installed and serviced.
The warranty clauses are no longer valid for any possible damage
or malfunction that may occur during or due to operation outside
the application values.
Tab. 3 - Operating limits
Room air conditions
Temperature:
From 20°C to 35° C
Humidity ratio
From 5.5 g/kg to
12 g/kg
Relative humidity From 20% to 60%
Temperature:
From 26°C to 40° C
Room air conditions
Humidity ratio
PX150 - PX165
From 5.5 g/kg to
12 g/kg
Relative humidity From 20% to 60%
Temperature:
Storage conditions
From -20°C to 50° C
Max. 90% RH,
Relative humidity preventing surface
condensation.
Power supply tolerances
V ± 10%
Hz ± 2
Note:
The allowed thermal load shall not be lower than 20% of nominal
air conditioner cooling capacity. Lower thermal load will drive
to imprecise temperature and humidity control and frequent
compressor(s) switch on/off.
Note:
The minimum condensing temperature for PX150-165 is 40 °C.
Outdoor temperature: lower limit
Exceeding the winter low temperature limits could
drive to issues at the microprocessor control, at the
electric devices and at the fan operation. Normally with
these low temperatures the compressor is stopped
and the EconoPhase is active. In case of compressor
running, exceeding these temperatures could stop the
compressor(s) by Low Pressure transducer. Reset to
normal operation can only be carried out manually through
the unit control.
Remote condenser Vertiv fan speed control (VARIEX) required.
It is standard available on the MC Condenser EconoPhase
version
Outdoor temperature: higher limit
This limit is determined by coupled condenser model.
Exceeding this limit (or a lack of maintenance), the
compressor(s) could stop by High Pressure switch. Reset to
normal operation can only be carried out manually.
Approved Remote Air Condenser
To ensure safe and correct operation, best performance,
and longest life the units must be connected only to remote
condensers approved by Vertiv.
The warranty clauses are no longer valid if the unit is connected
to an unapproved remote condenser.
Relative position room unit vs. remote condenser
From unit to condenser, max
distance
up to 60 m
equivalent
length
up to 100 m
equivalent
length
Max geodetic height between
condenser and room unit. The
condenser located below the
room unit is not allowed.
from 0 m to
18 m
from 0 m to
18 m
Requirements
Pipe diameter
see Tab. 6
see Tab. 6
Oil traps on vertical line of gas
refrigerant
every 6 m,
max
every 6 m,
max
Extra oil charge
see Tab.
7(Enc. B)
see Tab.
7(Enc. B)
Remote condenser fan speed
control (VARIEX) installation
mandatory
mandatory
design
oversized
+20%
Hot Gas Reheat
not allowed
not allowed
Insulation external liquid pipe
line
mandatory
mandatory
Condenser
down to - 35° C
10
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2 - Preliminary operations
2.1 - Safety Information
WARNING!
Risk of top-heavy unit falling over! Improper handling
can cause equipment damage, injury, or death! Read
all of the following instructions before attempting to move, lift,
remove packaging, or preparing unit for installation.
2.5 - Handling the Unit While Packaged
•
•
•
CAUTION!
Risk of sharp edges, splinters and exposed fasteners!
Can cause personal injury! Only properly trained
personnel wearing appropriate safety headgear, gloves, shoes and
glasses should attempt to move, lift, remove packaging from the
unit or prepare the unit for installation.
CAUTION!
•
Risk of overhead interference! Can cause unit and/or
structure damage! The unit may be too tall to fit through
a doorway while on the skid.
Measure the unit and doorway heights and refer to the installation
plans prior to moving the unit to verify clearances.
•
•
•
NOTICE!
Risk of unit damage if improperly stored! Keep the
unit vertically upright, indoors, and protected from
dampness, freezing temperatures, and contact damage.
•
Transport unit using a fork lift or pallet jack; otherwise use a
crane with slings, in this case use spreader bars to avoid risk
of crushing.
If using a fork lift or pallet jack, make sure the fork (if adjustable)
are spread to the widest allowable distance to still fit under the
skid. Also, ensure the fork length and distance is suitable for
the unit length and to ensure the unit stability.
When moving the packaged unit
with a fork lift, lift the unit from the
WARNING
designated side of the unit not
higher than 152 mm off the ground.
If circumstances require the unit to
be lifted higher than 152mm great
Unit weight is unbalanced.
Improper lifting can cause
personal injury, death, or
care shall be exercised and all
CENTER OF
damage to unit. Lift unit
from this side only.
GRAVITY
by-standing personnel are to be no
HEAVY SIDE!
closer than 5 m to the lift point of
the unit.
Always refer to the location of the Center of Gravity indicators
when lifting the unit from any other side.
Use the center of gravity indicators on the unit panels to
determine the position of the slings.
Center of gravity varies per unit size and selected options.
Slings shall be equally spaced on either side of the center
of gravity indicator, and with the widest allowable distance.
Be sure that the distance between slings guaranties the unit
stability.
Place the slings between the unit bottom rails and the skid.
NOTICE!
The conditioner must never be installed outdoor.
See drawings in Enclosure C.
2.2 - Equipment Inspection
Upon arrival of the unit, and before unpacking, verify that the
labeled equipment matches the Bill of Lading. Carefully inspect all
items for either visible or concealed damage. Damage should be
immediately reported to the carrier and a damage claim filled in
with a copy sent to your sales representative.
Equal
Distance
2.3 - Packing material
All material used to package this unit is recyclable.
Please save for future use, or dispose of the material
appropriately.
2.4 - Recommended Unit Handling Equipment
2.6 - Unpacking the Unit
1.
Remove the exterior stretch
wrap packaging material from
around the unit, exposing the
protective corner and side
packaging planks.
2.
Remove the top cover, corner
and side packaging planks
from the unit
Pallet Jack
Fork Lift
Piano Jacks
Spreader
Bars and
Slings
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
Equal
Distance
11
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2.7 - Moving to the Installation Location with Piano
Jacks
Make sure the floor can support the unit when being moved
with piano jacks. Adequate support (e.g. metal plates) should
be used to cover the floor to distribute the weight on the floor.
1.
2.8 - Unit Weight
Tab. 4 - Unit Weight
Models
A [kg]
Packaging [kg]
Standard Weight Unit
Acquire piano jacks and
place them into a position
so one is at each end of
the unit.
PX082
931
42
PX094
929
42
PX104
931
42
PX120
954
42
PX150
1080
58
PX165
1080
58
3 - Positioning
2.
Remove 4 bolts from the
pallet, two on each side.
Bolts can be removed by
using a socket wrench,
openend wrench or pliers.
Depending on the unit air discharge configuration there are different
kinds of positioning.
•
Before proceeding with the installation of all units see overall
dimensions and service area drawings in Enclosure C Installation Drawings
•
Make sure the floor can support the unit weight (see point 2.8
Unit weights)
•
If required, accessories are available to support the unit
in the final position, to help with water connection and the
maintenance operation.
See Enclosures E - Accessories
3.
4.
5.
•
•
•
•
Place a protective material
between the unit and the
piano jacks and straps.
Using the piano jacks,
the unit can be moved
to the site for installation
(min. two technicians are
required).
Piano Jacks Removal
Place the unit as low as the piano jacks will allow
Undo all the strapping holding the piano jacks to the unit
Use a pry bar or a similar device to lift the unit high enough
allowing the removal of the piano jacks on each side
Remove all material used to protect the unit from the piano
jacks and strapping
To move the Fan and the Coil Module of the Extended Height
unit use the above instructions (point 1 to 5).
12
NOTICE: Ensure isolation between the air conditioner
and the floor to avoid vibration transmission.
3.1 - Positioning: Downflow Up.
•
•
The units have to be installed on the floor
Downflow Up version - a raised floor with an opening below
the unit is required to ensure the correct airflow under the floor.
See Enclosure C.
1.
To move the unit use the piano
jacks. Make sure the floor can
support the unit when being
moved with piano jacks.
Place protective material between
the unit and the piano jacks and
straps.
2.
3.
With the unit secured to the piano jacks it can be moved to the
site for installation (min. two technicians are required).
3.2 - Positioning: Downflow Down.
A raised floor is required for this installation. The fan section is
installed completely under the floor allowing the correct airflow
below
the
floor.
See
Enclosure C
1. Attach 4 shackles M12
to the coil module (not
supplied). Use appropriate shackles to lift the total assembled unit load.
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2.
Use sling and a 4
point lifting bar (not
supplied) to lift the unit
and place it on the floor
in the right position.
4 - Refrigeration connections
4.1 - Refrigeration pipeline connections
The air condensing units are delivered helium- pressurized at
2 bar.
CAUTION: The discharge operation of the room unit
pressurized with helium (at 2 bar) and the unbrazing
of the bottoms from the connections must be carried
out as last operations, immediately followed by the
connection and emptying of the whole system.
Downflow Down position
Right position of the Downflow Down unit respect the floor level.
All dimensions in mm
It is the responsibility of the customer to ensure the right support
below the unit; if necessary accessories are available.
See enclosure E.
4.1.1 - General layout
1. In soft or hard copper.
The diameter required is stated in Tab. 6.
If the installer intends to use pipes of a larger diameter (e.g.
for long winding runs) then consult HPAC Technical Sales
Support.
Use as short refrigeration pipelines as possible to minimize
the total charge of refrigerant and the pressure drops.
Lay the horizontal gas pipes with 1% downward gradient
towards the refrigerant flow.
2. Reduce the number of bends, which must be of large radius,
to a minimum.
3. Insulate the piping as specified in Tab. 5. If the pipes are put
next to electrical cables it is advised to insulate them to avoid
damage to cable insulation.
4. There must be a minimum separation of 20mm between the
gas and liquid pipelines.
If this is not possible insulate both lines.
5. Support both horizontal and vertical pipes with vibrationdamping clamps (which include rubber gaskets).
Place these every 1.5 - 2 m.
Note:
In PX082, PX094, PX104, PX120, both circuits have tandem
compressors: each tandem compressor is composed of one scroll
compressor and one digital scroll compressor.
Note:
Seal any gap between the unit and the floor edge with a gasket.
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Fig. 8 - Recommended condenser and Liebert® EconoPhase™ unit locations, typical unit arrangement diagram layout
Top View
Circuit 1
Circuit 2
Air-Cooled
Condenser
Air-Cooled
Condenser
Entering Hot Gas Line
CIRCUIT 1
*Liquid line from
Condenser 28mm.
Do Not Trap Line
Slope toward Liebert
EconoPhase unit
50.8mm per 3m.
Top View
1067mm
Minimum
Clearance
Liebert
EconoPhase
Unit
Liquid Line
to Liebert
EconoPhase
from Bottom of
Receiver
Entering Hot Gas Line
CIRCUIT 2
Minimum Clearance: see relevant User Manual
* Liquid from Condenser 28mm
Do Not Trap Line
Slope toward Liebert
EconoPhase unit
50.8mm per 3m.
* Liquid from Condenser 28mm"
Do Not Trap Line
Slope toward Liebert
EconoPhase unit
50.8mm per 3m.
CIRCUIT 1
CIRCUIT 2
1524mm
1524mm
leg height
Typical; see Note 1.
Factory-Supplied, Field-Installed
Field Piping
1. For proper pump function, a minimum elevation difference of 1524 mm
must be maintained between the bottom of condenser box to the bottom
of Liebert EconoPhase unit.
2. All indoor and outdoor field refrigerant piping must be insulated, 12.7mm minimum.
All outdoor insulation must be UV- and ozone-resistant.
14
*Components are not supplied by
Liebert but are recommended
for proper circuit operation and
maintenance.
**Components supplied by Liebert
and must be field-installed.
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Tab. 5 - Condenser positioning
CONDENSER
POSITION
INSULATION
4.1.3 - Installing pipelines
THE FOLLOWING OPERATIONS MUST BE CARRIED OUT BY
AN EXPERIENCED REFRIGERATION TECHNICIAN.
CONDENSER ABOVE
CONDITIONER
gas
NOTICE:
The discharge operation of the room unit pressurized with
helium (at 2 bar) and the unbrazing of the bottoms from
the connections must be carried out as last operations,
immediately followed by the connection and emptying of the
whole system.
required
liq.
required
1.
PRE
(see **)
gas
1%
room unit
liquid
6m
(see *)
LAYOUT
1%
(*) Oil traps every 6 m of
vertical piping
(*) Oil traps every 6 m of vertical pipping. Create an oil trap on
the horizonthal discharge line before each lift.
(**) See paragraph 1.9 - Operating limits
2.
4.1.2 - Pipe diameter
The diameters of the connecting pipes between the conditioner and
the condensing unit listed in Tab. d must be respected, otherwise
the guarantee becomes invalid..
Tab. 6 - Pipe diameters (room unit - remote condenser - pump
module)
3.
STANDARD PIPE DIAMETERS
(Valid for equivalent lengths up to 100 m)
MOD.
copper tube external diametre x thickness [mm]
R410A
Gas
Liquid from
condenser to PRE
Liquid from PRE
to room unit
PX082
28 x 1.5
28 x 1.5
22 x 1.5
PX094
28 x 1.5
28 x 1.5
22 x 1.5
PX104
28 x 1.5
28 x 1.5
22 x 1.5
PX120
28 x 1.5
28 x 1.5
22 x 1.5
PX150
35 x 1.5
35 x 1.5
28 x 1.5
PX165
35 x 1.5
35 x 1.5
28 x 1.5
WARNING: Due to higher pressure with R410A, use
copper pipes and copper fittings with thickness 1.5mm
when external pipe diameters are higher than 18mm
(22 and 28mm)
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
Lay the piping, taking note of the following:
•
Welding:
•
All joints must be braze-welded.
•
Avoid butt welds by using sleeves or enlarging one
of the pipes using a pipe opener.
•
Use silver-based solders and the correct apparatus.
•
Guarantee a correct weld as a refrigerant leak, or
a faulty weld which leads to a leak later on, can
seriously damage the air conditioner.
•
Always use large-radius curves (bending radius at least
equal to pipe diameter). Bend the pipes as follows:
•
soft copper: by hand or bending device.
•
hard copper: use preformed curves. Do not overheat
the pipes when welding so as to minimize oxidation.
Connect the pipes to the condenser:
•
Condensers with butt-welded pipe connections: cut the
pipe, enlarge it and weld it to the pipeline.
•
Condensers with threaded tap connections: flange the
pipes and connect.
RESPECT THE DIRECTION OF REFRIGERANT FLOW
(SEE LABELS ON REFRIGERANT CONNECTIONS).
Wash out the pipelines as follows:
a. Plug up the free ends of the pipes.
b. Connect a helium or nitrogen cylinder, fitted with a
reducer (max. pressure 10 bar), to the ¼” SAE Schrader
valve of the condenser.
c. Pressurize the pipes with helium or nitrogen.
d. Unplug the pipes instantaneously.
e. Repeat a) - d) several times.
THIS OPERATION IS IMPORTANT TO AVOID REFRIGERANT
FILTER CLOGGING, ESPECIALLY WHEN HARD COPPER
PIPING IS USED.
4.
5.
6.
7.
8.
Open all the room unit shut- off valve.
Discharge the room unit pressurized with helium (at 2 bar)
opening the charge valves so that all the branches of the circuit
are discharged (e.g. on the receiver, on the low pressure side
and on the compressor delivery).
Unbraze the bottoms from the connections of the room unit.
Fix (weld) the pipes to the connections on the air conditioner.
Connect the refrigerant safety valve to the outdoor with a
copper pipe sized in order to satisfy the requirements of
EN13136 (i.e. till 10m length, i 26mm).
15
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Tab. 7 - Weight of refrigerant contained in piping during operation
EXTERNAL PIPE DIAMETER
gas(*)
liquid (+), at different condensing temperatures R410A (kg/m)
35.0 0C
46.0 0C
57.0 0C
22 x 1.5
(mm)
0.027
0.286
0.265
0.240
28 x 1.5
0.047
0.496
0.459
0.416
35 x 1.5
0.076
0.812
0.751
0.681
(*) Due to the small weight influence (at 15.5 bar - discharge temp. 650C), only 46.36 kg/m3 for R410A is considered.
(+) Liquid pressure and density varies according to condensing temperature (see refrigerant tables).
Tab. 8 - Equivalent lengths (m) of: curves, shut-off and non-return valves
Nominal
diameter
(mm)
16
90
45
180
90
12
0.50
0.25
0.75
2.10
1.90
14
0.53
0.26
0.80
2.20
2.00
16
0.55
0.27
0.85
2.40
2.10
18
0.60
0.30
0.95
2.70
2.40
22
0.70
0.35
1.10
3.20
2.80
28
0.80
0.45
1.30
4.00
3.30
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4.2 - Vacuum creation and refrigerant charge
5.
NOTICE: Check the refrigerant type to be used
on the data plate of the air conditioner and on the
refrigerating compressor.
Fig. 9 - Vacuum Pump and refrigerant charging cylinder
connections for vacuum creation and refrigerant charge
11a
14
11
6.
7.
13
8.
Break the vacuum as follows:
a) Close the cock (10a) for the vacuum pump (10).
b) Open the cock of the refrigerant cylinder (11a) until the
system reaches a pressure value of about 1 bar.
NOTICE: The refrigerant must be introduced and
charged on evaporator inlet (5/16 Shrader valve)
taking only liquid fluid from the cylinder.
c) At this point both the vacuum pump and the refrigerant
cylinder can be disconnected as follows:
c1) close the cylinder cock (11a)
c2) close the way 5/16” SAE of the connected Schrader
valves.
Inspect all connections/joints using a leak detector. If a nleak
is found, empty the pipes and the condenser, seal the leak and
repeat the instructions in 3) - 6).
Now the machine is ready for completing the charge and the
start-up.
Charge the refrigerant (ONLY LIQUID) by means of the charge
valve placed at the evaporator inlet.
4.2.2 - R410A refrigerant charge
(*)
1.
2.
3.
R.L.
4.
12
5.
10a
6.
7.
10b
10
Start the unit as described in para. 7.1.
Manually start the compressor (when the unit is equipped with
tandem compressors start both of them), ensure the unit is not
in the dehumidification phase).
Guarantee a constant condensing temperature (preferably
42-45°C); if necessary, partially obstruct the condenser coil
surface or limit its ventilating power to obtain these conditions.
Charge the unit until the working conditions of the entire
refrigeration circuit have become normal.
Using a manometer, check that the evaporating temperature
is above 00C.
Verify that the superheat is 6-8 K (to do this refer to para. 10.1).
Follow the diagram below to define the charge. Measuring
condensing temperature and evaporating temperature at
the compressor, find in the diagram the target subcooling
then adjust the charge to match the target subcooling found
(subcooling should be measured at the expansion valve inlet).
With scroll compressor cooling systems, during the charge
adjustment, the compressors have to be at the full capacity.
PDX
2÷5 ° C evap. temp.
5÷8 ° C evap. temp.
8÷12 ° C evap. temp.
14
12
1.
Open all cocks of the system including those used for
pressurizing (ambient unit and condensing unit).
With this operation all the components of the refrigerating
circuit must be subject to vacuum.
2. Connect a proper, high efficiency vacuum pump (10) suitable
for polyester oils to the couplings:
- Compressor intake and delivery using the 5/16
Schrader valves welded on the piping.
- Schrader coupling (12) fit on the liquid receiver.
- Schrader coupling (13) fit on the compressor or fan space,
if the reheating coil option is available.
3. Provide for a connection with refrigerant cylinder before
making vacuum.
4. Make the system vacuum up to 0.3 absolute mbar and after
3 hours check if 1.3 absolute mbar have not been exceeded.
This condition ensures a humidity lower than 50 ppm inside
the system. If the complete vacuum is not possible, this means
that there are some leaks (to be removed according to the
instructions in 6 below).
NEVER USE THE COMPRESSOR TO CREATE A VACUUM
(THIS INVALIDATES ITS GUARANTEE).
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
10
8
6
4
2
0
25
30
35
40
45
50
55
60
Condensing temperature [° C]
PDX SMART AISLE APPLICATION
8÷12 ° C evap. temp.
12÷15 ° C evap. temp.
14
12
subcooling [K]
4.2.1 - R410A precharge
subcooling [K]
(*) only with reheating coil (optional)
15÷20 ° C evap. temp.
10
8
6
4
2
0
25
30
35
40
45
50
55
60
Condensing temperature [° C]
4.3 - Refrigeration circuits (see Enclosure D)
See drawings in Enclosure D.
17
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5 - Water connections
Fig. 11 - Wye vs. Delta power supply connection diagram
Wye Power Supply
Connection
5.1 - General warnings
Delta Power Supply
Connection
ENSURE THAT THE TUBING DOES NOT OBSTRUCT THE AIR
FLOW (Downflow units only).
IF THE TUBING IS TO RUN OUTDOORS, ADD ETHYLENE
GLYCOL TO THE CIRCUIT.
5.2 - Water connections
5.2.1 - Condensate drain (for unit without condensate pump);
(Fig. 10):
•
•
•
•
Use galvanized steel, PVC or flexible polythene tubing.
Allow a 1% gradient towards the drain.
It is necessary to make a drain trap (1) placed at least 200mm
below the drain tray (2). In the Upflow configuration units the
drain trap must be placed under the unit, in the false floor.
Caution: If the drain trap is done inside the fan module
in the Downflow configurations attach the tube and the
drain trap properly to the fan module frame using a
cable tie, avoiding the risk of contact with fans.
Fill the drain trap with water (3).
Fig. 10 - Condensate drain
2
1
min.
200 mm
Acceptable Power Supplies-380V to 460V Nominal Units (TT
System, TNS System or TNC System)
•
380V wye with solidly grounded neutral and 220V line-toground
•
460V wye with solidly grounded neutral and 277V line-toground.
Unacceptable Power Supplies - 380V to 460V Nominal Units
(IT System)
•
Wye with high-resistance (or impedance) ground
•
Delta without ground or with floating ground
•
Delta with corner ground
•
Delta with grounded center tap.
If the unit must be installed in the IT System, contact Vertiv
Technical department prior to installation.
6.3 - Power supply cable connection.
•
3
min.
100 mm
•
BRACKET
to be
connected
by user
5.2.2 - Humidifier (optional):
See Enclosure A.
6 - Electrical connections
6.1 - Electrical connections
1.
•
•
•
Before proceeding with the electrical connections, ensure that:
all electrical components are undamaged;
all terminal screws are tight;
the supply voltage and frequency are as indicated on the unit.
•
•
•
Connect the cable to the Line inlet terminal board. See Fig.12
power supply cable path. For units with dual power supply
option do not connect the power cable supply as illustrated in
Fig. 12; two supply cables must be arranged and connected to
the additional electrical panel placed near the main electrical
panel.
Use the cable size defined according to maximum current
absorbed, the supply voltage, the installation type and the
local specification. For unit with dual power supply both supply
cables must be dimensioned as described above.
The system/line cable protection is to be arranged by the
customer. Use a protection with differential switch. If the
system is equipped with EC fans, use a B type switch.
Use multipolar cables with sheath (CEI2022, IEC 60332) only.
Do not fit the supply cable in the raceways inside the machine
electric board.
See electrical data in Enclosure B: Technical data tables.
WARNING: For the units (in particular if the external
display isn’t installed) must be provided an external
main switch, easy to access, to facilitate, when
necessary the unit shutdown.
Fig. 12 - Power supply cable connection.
6.2 - Wye vs. Delta Connection Power Supply for PDX
The Liebert® PDX EC Fan Model is designed to operate with Wyeconnected power. It will not operate properly with Delta connected
power. A field-supplied isolation transformer or other power
solutions will be needed for proper function. The electronically
commutated motors included in the Liebert® PDX are suitable for
connection to power supplies with a solidly grounded neutral.
18
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Fig. 13 - Available terminals
AUXILIARY TERMINAL BOX
4 compressors
(Cooling + Electr. heating + Humidification)
remote on- off
(CLOSE = ON)
394
0394
clogged filter (CF)
(CLOSE = OK)
362
361
(*) water leakage (LWD)
710
720
GENERAL ALARM
(400, 401 NC = alarm or unit off)
WARNING
(300, 301 NC = warning or unit off)
smokestat firestat (AAP)
optional (CLOSE = ON)
400 (NC)
401 (C)
402 (NO)
300 (NC)
301 (C)
302 (NC)
86
83
operating fan
(CLOSE = ON)
70
71
operating compressor 1
(CLOSE = ON)
72
73
operating compressor 2
(CLOSE = ON)
operating compressor 3
(CLOSE = ON)
74
75
operating compressor 4
(CLOSE = ON)
78
79
user alarm 1
(CLOSE = OK)
user alarm 2
(CLOSE = OK)
70C Liebert MC Condenser, common control signal
71C Liebert MC Condenser, circuit 1 control signal
230C Liebert MC Condenser, circuit 2 control signal
76
77
86
030
86
82
70C
71C
230C
Note: Connect 70C terminal with Liebert MC Condenser terminal 700, connect 71C terminal with Liebert MC Condenser terminal 710,
connect 230C terminal with Liebert MC Condenser terminal 230.
•
•
•
•
Right side: internal low voltage field wiring pathways
Left side: internal high voltage field wiring pathways
Use the cable bushing on the back of the panel to get into the
electrical panel.
Use cable tie to fix the power and low voltage cable to the
electrical panel.
With any of these failures, the motor stops (electronically - no
potential separation), the status relay is released.
NO automatic restart. To reset the alarm, power supply has to be
switched off for min. 20 s once motor is at standstill.
•
For cable entrance holes details see Enclosure D.
Wiring connections (Fig. 13):
•
Connection for remote on-off must be done by the installer.
•
The General Alarm terminals allow remote alarm signaling.
•
In case of short circuit, check the sticking of the involved
switch and replace it.
6.4 - Protection degree IP2x check
After whole of the connections and installation works, comprising
ceiling elements (plenum, ducting) and floor elements (base frame),
check and verify the protection degree IP2x (protection against finger
access, std. IEC 60364-1) at the boundary of the air conditioner.
6.5 - Protective features of EC fan
The EC fan has been provided with the following protective features:
•
Electronics overheating protection
•
Motor overheating protection
•
Locked rotor protection
•
Short circuit at the motor output
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
•
Mains under-voltage detection:
if mains voltage falls below 3ph/290Vac (typical value) for 5s
minimum, motor will be switched off (only by electronics, no
potential separation), status relay is released.
If mains voltage returns to correct values, the motor will
restart automatically.
Phase failure recognition:
if one phase fails for 5s minimum, motor will be switched off
(only by electronics, no potential separation), status relay is
released.
If all 3 phases return to correct values, the motor will
restart automatically within 10-40s.
The power supply for an external speed setting potentiometer is
short-circuit protected.
Motor is overload-protected via motor current limitation.
Warning! Leakage current of the motor is approx. 7 mA.
19
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7 - Start-up
7.1 - First start-up (or after long standstill)
TO PREVENT COMPRESSOR DAMAGE THE CRANKCASE(S)
MUST BE PREHEATED FOR AT LEAST 4 HOURS BEFORE
CONDITIONER START-UP (FAILURE TO DO SO INVALIDATES
THE GUARANTEE).
Start the air conditioner as follows:
1. Open all valves in the refrigeration circuit according to the
instruction label attached to the valve.
2. Ensure that the refrigerant charge is correct (see Chap. 4).
3. Using a leak detector, verify that there are no refrigerant
leaks. If there are any, then repair the leak and recharge as
described in Chap. 4.
4. At least 4 hours before start-up, close the main switch and
miniature circuit breaker for transformers’ protection on the
electrical panel. In the control system factory setting the
stand alone mode is standard. The stand alone mode gives
the possibility of turning on the unit simply rotating the main
switch on the electric panel. The yellow LED on the Control
case will light after turning the unit on, showing the presence
of the electric power.
If the LED does not light up:
•
check the electric panel power supply;
•
check the protection devices (e.g.: thermal switches);
•
check the fuses.
5. Verify the operation of the crankcase heater.
6. (With Electronic Expansion Valve option) The battery is
normally charged enough by the supplier to pass properly
the production test. In case the unit has been left for long
period without power the level of charge could be reduced
further. If after Power ON the iCOM control should generate
the “EEV1/2 Battery failure” warning, please wait approx 24h
before to decide to change the battery; this will give necessary
time for recharge; if after this time the warning event is still
present, then replace the battery with a new one.
7. Check that there are no water leakages.
8. If an external condenser is installed, start it by supplying
power to it.
9. Close all MCBs on the electrical panel.
10. Check the supply voltage on all phases.
11. Check the supply voltage on all phases for the external
condenser, if fitted.
12. ENSURE THAT THE COMPRESSOR HAS BEEN
PREHEATED FOR AT LEAST 4 HOURS BEFORE STARTING
THE UNIT.
13. Start the unit by pressing ON/OFF on the external display (on
the internal display if the external display is not installed)
14. Check the electrical absorption of all components (see Chap.
6).
15. Check the electrical absorption of the external condenser/ Dry
cooler, if fitted.
16. IMPORTANT - If the compressor makes a loud and
unusual noise IT IS NECESSARY TO INVERT the electrical
connections of the phases supplying the corresponding
scroll compressor, which accepts only one direction of
rotation.
17. Ensure that the fans rotate in the correct direction (see arrow
on fan).
CAUTION: risk of contact with rotating devices.
18. Ensure that all control system settings are correct and that
there are no alarms (see Control manual).
19. Verify the Fresh Air Intake operation (if fitted).
20
20. Once the system is operating under load, check the various
components, as follows:
•
Verify that the fans are operating properly.
•
Ensure that the temperature and relative humidity are being
controlled, and that the humidifier (optional) and heating steps
(optional) operate when required.
•
Ensure that the compressor operates when required.
•
Ensure that the fan operation controller on the external
condenser is calibrated correctly, and that it controls the fan
operation.
•
Check oil level inside compressors, where compressor’s oil
level sight glass is available, after 30 min of compressors
running at maximum capacity: oil level must be between ½ and
¾ of sight glass. In tandem compressors the oil level must be
checked with both compressors running at maximum capacity
(note: when only one compressor is running, the oil level inside
the compressor that is not currently running could be at the
minimum and the compressor, that is running, at the maximum
level; when one compressor is running at maximum capacity
and one compressor is running in modulating capacity, the oil
level in the latter one could be between 1/2 and the minimum).
7.2 - Starting and stopping
•
ALWAYS ENSURE THAT EACH CRANKCASE HAS BEEN
PREHEATED. FOR BRIEF STOPPAGES KEEP THE SUPPLY
TO THE CRANKCASE HEATER.
Turn on the unit operating on the ON/OFF switch placed on the
display. If the ON/OFF remote device is not installed, the green
LED on the Control case will light up together with the LED placed
below the ON/OFF switch. The fan starts immediately (the fan
always works when the unit is ON); after 2 minutes the regulation is
activated, so the cooling (compressor), heating (electric heaters),
humidifying and dehumidifying devices can start.
Adjust the set-point as indicated in Control manual.
Stop the unit putting the ON/OFF switch in OFF.
•
The main switch on the electrical panel inside the unit should
be switched off if the unit is stopped for a long time.
7.3 - Automatic restart
If desired, the unit will automatically restart on the return of
power after a supply interruption (see Control manual). If the
power interruption is expected to be of several hours, to avoid an
automatic cold restart of the compressor stop the unit before the
black-out and, on the return of power, allow the compressor to
preheat before restarting the unit.
7.4 - Checking the refrigeration piping pressure
drops
Liebert® PDX is equipped with connections to check the
refrigeration piping pressure drops:
room unit → condenser →room unit
To carry out this operation it is necessary to use 2 calibrated
manometers and connect them as follows:
M1, connected to the compressor delivery valve;
M2, connected to the Schrader valve (1) of Fig. 14.
When the compressor is running, check M1 and M2.
N.B.: Repeat this test, inverting the manometers: to calculate the
correct p consider the average value of the two readings.
Refrigeration pipeline Pressure drops (Δ p bar), at 45°C
•
At the same geodetic level: Δ p (bar) = M1-M2
•
When condenser is above the room unit:
Δp (bar) = M1-M2+geodetic difference (m x 1,1:10,2)
•
When condenser is below the room unit:
Δ p (bar) = M1-M2-geodetic difference (m x 1,1:10,2)
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Fig. 14 - Refrigerant line components
different electrical sources. It is possible to chose between
different solutions:
•
Dual Power Supply Parallel: 2 separate power supplies:
during normal working mode both are present, during
emergency situation only the main one is present.
This means that during emergency mode full cooling
redundancy is granted disabling heating and humidifying.
This last option allows, during emergency mode, to
reduce unit power absorption and therefore Genset or
UPS sizes.
•
Dual Power Supply Alternate Basic Version: 2 separate
power supplies: each power supply is able to completely
feed the unit. In case of failure of the main supply the unit
automatically switches to the second power supply. This
allows having a complete power supply redundancy or in
case needed to have during emergency mode full cooling
redundancy disabling heating and humidifying. This last
option allows during emergency mode to reduce unit
power absorption and therefore Genset or UPS sizes.
2
4
1
3
from Liquid
Receiver
11
Filter
dryer
inletinlet
Schrader
valve
Filter
dryer
Schrader
22
Filter
dryer
Filter
dryer
33
Sight
glass
Sight
glass
44
Solenoid
valve
(only(only
with thermostatic
valve) expansion valve)
Solenoid
valve
with thermostatic
valve
•
DX mode
Compressor(s) starts and the air flow is reduced, thereby
causing dehumidification (refer also to Control manual).
8 - Operation
Unit operation is completely automatic. The below sequence
explains how the unit operates :
•
The air, sucked in by the fan, enters the unit.
•
The air is immediately filtered.
•
The TEMPERATURE sensor or HUMITEMP (temperature +
rel. humidity) sensor (check type installed), verifies the state of
the inlet air, and relays this information to the control system.
•
Filtered new air is injected into the air stream via the Fresh Air
Intake (optional).
•
The treated air passes through the fans, which operate
continuously, and is then dispersed out of the unit.
•
The air passes from the underfloor void into the room via
air distribution outlets. For “DOWNFLOW” units installed on
raised floor: switch off the machine before the floor panels
removal within a distance of 850mm from the machine, to
avoid risks of contact with rotating devices (fans) moving and
with hot heating elements. (see Fig. 15).
•
The control system compares the relayed information to the
set point and proportional band values programmed into its
memory: it then commands the air conditioner to treat the air
as follows (see also Control manual):
•
HEATING
This can take one of three forms:
•
electrical heating (optional): the heating elements heat
the air passing over them. There is 1 heating step.
•
Note: To protect the unit from superheating, one automatic
reset sensor set at 40°C and one or more manual reset
thermostats set at 120°C are installed.
•
Note: If, during dehumidification, the ambient temperature
drops below a specified level, dehumidification will be stopped
if necessary (see LOW LIMIT intervention in Control manual).
•
HUMIDIFICATION - optional
The humidifier creates steam, which is distributed into the air
stream via the steam distribution pipe (see also Enclosure A,
F, G).
Note: Manual control can be performed using the control system
(see Control manual).
Fig. 15 - Safe floor panels removal
850 mm
COOLING
The compressor (scroll compressor or digital scroll compressor,
with modulating capacity) is started and the cold refrigerant
flows through the evaporator, thus cooling the air passing over
it. For compressor operation see Control manual.
In dual circuit units, the evaporator is a dual stage coil, so the air
is cooled first by one circuit (circuit n°1, compressor(s) on the
left side) and then by the other one (circuit n°2, compressor(s)
on the right side) . Temperature and pressure values related to
the two refrigerant circuits can be different.
•
DEHUMIDIFICATION - optional
DUAL POWER SUPPLY - optional
This option allows a supply of electrical power from two
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
9 - Calibrations & Regulation
(at start-up)
The air conditioner has already been factory tested and calibrated,
but it is very important to check, at start-up, the superheating.
See Tab. 5 and Tab. 6 (Enclosure B) that show all valves.
•
The air conditioner has already been factory tested and
calibrated.
•
For calibrations of instruments installed on the external
condensers/Dry coolers refer to the relevant manual.
•
For control system calibrations refer to Control manual (to
prevent erratic operations do not use temperature sand rel.
humidity set points/proportional bands which differ excessively
from the Standard Settings).
21
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WARNING: Before any calibration with the unit
operating, remove the call for humidification and
electrical heating at the control.
9.1 - Water leakage sensor (Liquistat)
9.2 - Environment protection
A misuse or an incorrect calibration of the unit leads to an increased
energy consumption, resulting in an economic and environmental
damage. Use the freecooling function, if available.
Due to high flooding alarm device sensitivity, to the end to avoid
undesirable alarm signal because of few sporadic water drops,
place the sensors at a minimum distance of 500 mm from the unit
base perimeter.
This solution assures alarm intervention for real flooding risk only.
22
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10 - Maintenance and Spare Parts
10.1 - Safety instructions
All maintenance operations must be carried out strictly by observing the European and National accident prevention regulations. We refer
especially to the accident prevention regulations concerning electrical systems, refrigerators, and manufacturing resources.
Maintenance may be done to air conditioning equipment only by authorized and qualified technicians.
In order to keep all warranties valid, the maintenance must adhere to the manufacturer’s regulations.
DANGER: The work should be done in the system only when it is at standstill. Do this by switching off the air
conditioner at the controller and the main switch. Post a warning sign saying: “DO NOT SWITCH ON.” Electrical
components of device have to be switched off and be checked that they are not under voltage.
Ignoring the safety instructions can be dangerous to persons as well as to the environment.
Soiled parts always cause a loss of performance and for switch or control devices can lead to the break-down of a plant.
10.2 - Spare parts
Only original spare parts made by Vertiv may be used. Using third party material can invalidate the warranty. When making inquiries
always refer to the ”Component List” supplied with the equipment and specify the model number, serial number and, if available, also the
part number.
NOTES:
1) When a faulty component is replaced, follow the relevant manufacturer instructions.
2) When the spare parts must be welded, be careful not to damage the internal parts (gaskets, seals, o-rings, etc.).
10.3 - Maintenance schedule
Monthly, quarterly, biannual and annual checks are to be conducted according to the following guidelines.
All tasks and periods listed here are regulations from the manufacturer and need to be documented in an inspection report.
CAUTION: All these tasks should be carried out only by an authorized and trained technician. We recommend the
Vertiv Customer Service
10.4 - Air filter check and replacement
It is important to check the state of the air filter every month to maintain a good efficiency of air distribution through the evaporator coil.
CAUTION: Sharp edges, splinters and exposed fasteners can cause personal injury! Only properly trained personnel,
electrically instructed, wearing appropriate safety headgear, gloves, shoes and glasses can carry out this operation!
DOWNFLOW UNITS
Filter Bracket
1) Switch off the unit and open the
front panel with the key.
Note : Some components inside
the unit can be still at high temperature, wait a few minutes before
starting the maintenance operation.
2) Unscrew and remove the filter
brackets.
3) Remove air filters.
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
23
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10.5 - EC fan replacement
WARNING!
There is a risk of the fans and panel falling down and causing an injury during the replacement operation.
Due to the weight of the fans (approx. 35 kg) and the panel (up to 25 kg), two technicians are required to carry out the fan
replacement.
BEFORE COMMENCING, ALWAYS CUT ALL THE ELECTRIC SUPPLY CIRCUITS ON THE MACHINE OFF.
Only properly trained and qualified personnel should work on this equipment.
How to remove the fans
Remove the front panel (or a grid) to get access to the fan bays (see pictures below).
Downflow Up
Downflow Down
Note:
•
Downflow Down - remove floor panels positioned in front of the unit to get access to the fan section frontal grid. Remove any
obstacles in front of the fans to allow the fan extraction (e.g. the raised floor structure, piping)
Downflow Up
1) Disconnect the fan electrical cable from the
connector.
2) Remove the 2 front screws “a” from the fan
support (one screw on each side of the sli ding bars)
b
24
a
3) Loosen the 2 rear screws “b” of the fan support (one screw on each side of the sliding
bars)
4) Slide down the fan by pulling the handle.
5) Remove completely the 2 screws “b” on the
back of the fan.
6) Pull the handle to slide the fan out of the bay
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Maintenance schedule
FANS
WARNING: do not
reach into the fan
while the fan
wheel is runnin g.
AIR FILTERS
NEW AIR FILTER
(ifinstalled)
CONTROL
SYSTEM
HUMIDIFIER
(ifinstalled)
SWITCH CABINET
POWER CIRCUITS
WARNING:
electrical
cables and
electrical components
of the air conditioner
are under voltage.
REFRIGERATION
CIRCUIT
CAUTION: Fluo ride refrigerants
increase the greenhouse effect and are subject to restrictions and
norms, according to the
national and European
regulations.
ELECTRONIC
EXPANSION VALVE
and SUPERHEATING
CONTROLLER
Check for soiling, damage corrosion, and proper fixing.
Check bearings noise.
Measure the current and power consumption.
Cleaning to preserve the function.
Check for soiling, damage, corrosion.
Check state offilter.
Clean or replace if necessary.
Carry out controls more frequently in dusty environments.
X
X
see air filter. Clean or replace
X
Check for proper and functionally correct installation and surrounding conditions.
Check the function of the LEDs of the display’s control system and the alarms.
Check the connections for electrical and mechanical function.
Check the functional elements (e.g. operational controls and display devices).
Check the electrical/electronic and pneumatic input signals (e.g. sensors, remote
controllers, command variable) for compliance with nominal values.
Check control function, control signals and safety chains.
Adjust control function and control signals.
X
X
1 Year
6 Months
COMPONENT
3 Months
MAINTENANCE
PERIOD EVERY
X
X
X
X
X
X
X
X
X
X
X
See Enclosure A, F, G.
Check the power supply on all phases.
Check the connections for electrical and mechanical function.
Check the power supply at all terminals.
Measure power consumption at all connected consumers.
Set, adjust and tighten the functional elements (e.g. operational controls and display
devices).
Check safety equipment, e.g. thermal switch.
Replace fuses (every 2 - 3 years)
Check protective covers for completeness.
Measure the working pressures and temperatures (to be done by a refrigeration
technician).
Check the power consumption, measure head temperature and check for possible
abnormal operating sounds.
Make sure that there is no frost building up on the evaporator and compressor.
Check function of all regulating devices (power regulators, valves, etc.).
Check safety devices for function. If the quantity of the refrigerant is not enough, detect the
leakage if any. Then reclaim, void, repair and charge.
If the quantity of refrigerant is not enough, it needs to be reclaimed and refilled with
completely new refrigerant.
Check oil level at the sight glass (where sight glass is available).
Carry out a test to ceck humidity inside oil
Check crankcase heater for function.
Check digital modulation - solenoid valve
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
See appropriate manual.
(ifinstalled)
EXTERNAL
CONDENSER/
See appropriate manual.
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10.6 - Refrigeration circuit
WHEN REPAIRING THE REFRIGERATION CIRCUIT, COLLECT ALL REFRIGERANT IN A CONTAINER: DO NOT ALLOW IT TO
ESCAPE.
•
•
When removing (for repairs) or charging refrigerant, it must always be done on both the high and low pressure sides of the compressor
simultaneously.
The compressor copper plated steel connections should be welded with a silfos material containing a minimum of 5% silver.
10.6.2 - Oil charge R410A
The oil to be used when topping up (only if there are any leaks) is EMKARATE RL 32-3MA or Mobil EAL Arctic 22CC (see Tab. 9
and Tab. 10).
Tab. 9 - EMKARATE RL 32-3MA oil
Viscosity at 40 0C
: 31.2 cSt
Viscosity at 100 0C
: 5.6 cSt
Viscosity index (ISO Grade)
: 32
Tab. 10 - Mobil Arctic EAL 22CC oil
Density (at 15 0C)
: 0.967 kg/l
Flash point (C.O.C.)
: 245 °C
Pour point
: <-54 °C
Viscosity at 40 0C
: 23.6 cSt
Viscosity at 100 C
: 4.7 cSt
Viscosity index (ASTM D2270)
: 130
0
These oils rapidly absorb the humidity present in the air when they are exposed to the atmosphere.
If the oil absorbs humidity, the ester molecules can break down, forming acidity.
We therefore recommend exposing the oil for as short time as possible (no more than a few minutes) and, in case of topping up, using
exclusively the oil indicated on the refrigerating compressor.
Normally 1 or 2-litre cans are available for this purpose; once they are opened, they must be completely used up. They must not be used
after a long period, as they absorb humidity.
It is therefore obvious that the taps of the compressor must only be turned after the whole plant has been subjected to a vacuum and
partial filling.
10.6.3 - Oil topping-up of an installed circuit
If oil leakages occur, the topping-up operation is necessary.
(Contact the local Service before intervention).
10.7 - Dismantling the unit
The machine has been designed and built to ensure continuous operation.
The working life of some of the main components, such as the fan, depends on the maintenance that they receive.
CAUTION: The unit contains substances and components hazardous for the environment (electronic components, lead gel
battery, refrigerating gases and oils). At the end of the useful life, when the unit is dismantled, the operation must be carried
out by specialized refrigerating technicians. The unit must be delivered to suitable centers specialized for the collection and
disposal of equipment containing hazardous substances.
The lead gel battery, refrigeration fluid and the lubricating oil inside the circuit must be recovered according to the laws in force
in the relevant country.
26
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10.8 - Regulation (EU) no. 517/2014 (F-gas)
Stationary air conditioners placed into the European Community market and operating with fluorinated greenhouse gases
(F- gas, such as R407C, R134a, R410A), they have to comply since Jan 1, 2015 with the F- gas Regulation (EU) No. 517/2014. It
replaces the Re. (EU) no. 342/2006, applied since July 4, 2007.
By the way, the refrigerants as R22 are not F- gas and their relevant regulation is Reg. (EU) no. 2037/2000.
Following notes have to be considered when operating with the above mentioned equipments:
•
Fluorinated greenhouse gases are covered by the Kyoto Protocol.
•
The fluorinated greenhouse gases in this equipment should not be vented to the atmosphere.
•
Referring to the value noted in Annex I and Annex IV of Regulation (EU) No 517/2014 here below the global warming potential (GWP)
of some major F- gases or mixtures:
R- 134a
R- 407C
R- 410A
GWP 1430
GWP 1774
GWP 2088
• Operators of the above mentioned applications, which contain fluorinated greenhouse gases, shall, using all measures which are
technically feasible and do not entail disproportionate cost:
a. Prevent leakage of these gases and as soon as possible repair any detected leakage.
b. Ensure that they are checked for leakage by certified personnel.
c. Ensure for putting in place arrangements for the proper recovery by certified personnel.
d. In case of applications containing 5 tons CO2 equivalent, i.e. 2.4 kg of R410A (10 tons in case of hermetically sealed system) or
more of F- gases: certified personnel and Companies (according to Reg. 303/2008) provides regular leak testing (according to
Reg. 1516/2007 and Reg. 1497/2007) and maintain records of maintenance activities in a dedicated log book.
e. Recovery for the purpose of recycling, reclamation or destruction of the fluorinated greenhouse gases, pursuant to
Art. 8 of the Regulation shall take place before the final disposal of that equipment and, when appropriate, during its
servicing and maintenance.
•
Operator, according to Regulation Article 2, point 8, means the natural or legal person exercising actual power over the technical
functioning of products and equipment covered by this Regulation. The State may, in defined, specific situations, designate the
owner as being responsible for the operator’s obligations. Where large installations are involved, service companies are contracted
to carry out maintenance or servicing. In these cases the determination of the operator depends on the contractual and practical
arrangements between the parties.
•
Direct methods of leakage checking approved by the manufacturer (Reg. 1516/2007 and Reg. 1497/2007)
a. Gas detection device adapted to the refrigerant in the system;the sensitive of portable gas detection devices (as a direct test
method) shall be at least five grams par year.
b. Proprietary bubble solutions / soapsuds.
•
Additional information located into a dedicated label of unit (Reg. 1494/2007)
a. Where fluorinated greenhouse gas is foreseen to be added to the equipment outside of the manufacturing site at the point
of installation, a dedicated label accommodates notation of both the quantity (kg) pre-charged in the manufacturing plant and of
the quantity charged at the installation site as well as the resulting total quantity of f-gas as a combination of the above mentioned
quantities, in a manner which conforms to the legibility and indelibility.
Our split units are usually not pre-charged on factory, in this case the total quantity of refrigerant charged in the unit has to be written
in the relevant label, during the commissioning operation at the installation site.
b. Our packaged units (not split) operating with f - gas are usually full charged on factory and the total amount of refrigerant charge
is already reported on the label. In this case, the label has no need of further written information.
c. In generally, the above mentioned information has been located in the main nameplate of relevant unit.
d. For equipment with double refrigeration circuits, in regards to differentiates requirements on the basis of the quantity of f-gas
contained, the required information about refrigerant charge quantities has to be listed separately for each individual circuit.
e. For equipments with separate indoor and outdoor sections connected by refrigerant piping, the label information will be on that
part of the equipment which is initially charged with the refrigerant. In case of a split system (separate indoor and outdoor sections)
without a factory pre-charge of refrigerant, the mandatory label information will be on that part of the product or equipment which
contains the most suitable service points for charging or recovering the fluorinated greenhouse gas(es).
•
Safety data sheets of f-gases used in the products are available on demand.
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Enclosure A - Electrode Humidifier
A.1 - Electrode humidifier
The operation of immersed electrode humidifiers is based on a very simple physical principle. As common drinking water contains a
certain quantity of dissolved mineral salts, and is consequently slightly conductive, applying a voltage to metal electrodes immersed in the
water creates an electric current that heats the water until producing steam (Joule effect). The quantity of steam produced is proportional
to the electric current, which is in turn proportional to the level of water.
In order to obtain optimum performance from the humidifier it is advisable to read this manual carefully.
Tab. 1 - Humidair specifications
HUMIDAIR
MODEL
MAIN POWER
SUPPLIES
(V ± 10%)
KUEC2E
SETTING ABSORBED POWER MAX. CYLINDER
MAX. SUPPLY
CURRENT
WATER VOLUME WATER QUANTITY
MAX. DRAIN
WATER QUANTITY
[kg/h] (*)
[A]
[kW]
[l]
[l/min.]
[l/min.]
400V / 3ph / 50Hz 3.9…13.0
13
9
5.5
0.6
10.0
For humidifier current (FLA) and rated power, refer to electrical features in the Enclosure B.
(*) Unit is factory- set to produce about 50% of the maximum value (see iCOM manual).
A.2 - Installation
The humidifier is supplied already mounted within the air conditioner. The only necessary operations are the connections for the supply
water and drain water.
Supply Water.
Only use mains drinking water with:
•
Pressure between 0.1 and 0.8MPa (1 and 8 bars), temperature between 1 and 40° C and an instant flow rate no higher than the rated
flow of the fill solenoid valve, the connection is R ¾ (ISO 7/1);
•
Hardness no greater than 400 ppm of CaCO3 (40° fH), conductivity range: 75- 1250 μS/cm;
no organic compounds. supply water
characteristics
Hydrogen ions
Specific conductivity at 20° C(σR, 20° C)
unit of
measure
normal water
min.
water with low salt content
max
min.
max.
(pH)
7
8.5
7
8.5
(σR, 20° C) S/cm
350
1250
75
350
Total dissolved solids(cR)
mg/l
(1)
(1)
(1)
(1)
Dry residue at 180° C(TH)
mg/l
(1)
(1)
(1)
(1)
Total hardness
mg/l CaCO3
100 (2)
400
50 (2)
160
Temporary hardness
mg/l CaCO3
60
300
30 (3)
100
Iron + Manganese
mg/l Fe+Mn
=
0.2
=
0.2
ppm Cl-
=
30
=
20
mg/l SiO2
=
20
=
20
Residual chlorine
mg/l Cl2
=
0.2
=
0.2
Calcium sulphate
mg/l CaSO4
=
100
=
60
Metallic Impurities
mg/l
0
0
0
0
Solvents, thinners, detergents, lubricants
mg/l
0
0
0
0
Chlorides
Silica
(1)= values depend on the specific conductivity; in general: CR ≈0.65 * σR, 20° C; R180 ≈0,93 * σR, 20° C
(2) = not less than 200% of the chloride content in mg/l CL(3) = not less than 300% of the chloride content in mg/l CL-
There is not reliable relationship between hardness and conductivity of the water
Important:
•
•
•
do not treat the water with softeners, this may cause the entrainment of foam, affecting the operation of the unit;
do not add disinfectants or anti-corrosive compounds to the water, as these are potential irritants;
the use of well water, industrial water or water from cooling circuits and, in general,any potentially chemically or bacteriologically
contaminated water is not recommended.
Connection:
For the supply water connection see the details in Fig. 1 (point 11- 14)
Drain Water.
•
•
•
A-1
This contains the same substances dissolved in the supply water, however in larger quantities;
It may reach a temperature of 100° C;
It is not toxic and can be drained into the sewerage system, category 3, EN 1717.
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Enclosure A - Electrode Humidifier
Important:
For drain water connection see details in Fig. 1:
•
Use a drain hose Ø 32 mm, maximum length 10 m with minimum5% gradient, don’t make siphon on this hose to avoid back pressures in the drain piping. For configuration with bigger length or high head consider the PDX option with condensate pump.
•
Dispose the drain hose into an ordinary drainage network. (the drainage network should have a siphon (see Fig. 1) and must be able
to withstand temperatures up to 100° C and able to drain water flow up to 10l/min.
•
Pay attention in the manual drainage of the steam cylinder if the drainage network isn’t able to drain 10 l/min, risk of water overflow
on the humidifier.
A.2.1 - Electrode humidifier components
1.
chassis
2.
fill tank
2a. conductivity electrodes
3.
cylinder
3a. high level electrodes
3b. immersed electrodes
3c. filter inside the cylinder
4.
cylinder fastening strap
5.
hose kit
5a. supply hose
5b. fill hose
5c. drain pump and overflow outlet hose
5d. drain hose
6.
fill solenoid valve
7.
drain pump
8.
drain connection (diameter 32mm)
9.
steam outlet
10. steam distribution hose
11. manual valve (not supplied)
12. mechanical filter (not supplied)
13. supply hose (not supplied)
14. connection hose
15. drain hose with siphon (not supplied)
Fig. 1 - The humidifier and its components
Supply limit
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Enclosure A - Electrode Humidifier
A.3 - Start - up and operation
A.3.1 - Start - up
Before using the humidifier, check the following:
•
•
•
•
•
Supply and drain connections.
That the cut- off tap is open.
All wiring.
Earthing.
Steam hose connection between steam cylinder and distributor.
To start the humidifier simply switch on the air conditioner, which will in turn automatically start and stop the humidifier as required. The
(adjustable) parameters which determine humidifier operation have already been factory- preset (see iCOM manual).
A.3.2 - Operation
Water contains even a small quantity of salts in solution, is a conductor of electricity. Therefore, if the steam cylinder is filled with water
and a potential difference is applied between the electrodes, the water behaves like an ordinary electrical resistance and becomes hot,
thus creating steam.
The steam production rate can be controlled by varying the water level in the cylinder; the higher the water level, the deeper the electrodes
are immersed into it and the greater the steam production.
Note 1
In case of low water conductivity consult HPAC Technical Sales Support.
Note 2
When starting with an empty cylinder, the water conductivity is normally insufficient for the HUMIDIFIER STEAM OUTPUT to be reached
immediately.
Therefore the humidifier produces as much steam as possible to fill the cylinder completely. Any evaporation water is immediately refilled.
The drain valve is kept shut and therefore, as the steam does not contain any salts, the conductivity of the water within the cylinder slowly
increases until the HUMIDIFIER STEAM OUTPUT is obtained.
The length of the start- up period depends upon the water conductivity. For very conductive water it may occur that the HUMIDIFIER
STEAM OUTPUT is obtained immediately.
A.4 - Maintenance
Important: the cylinder may be hot. Let it cool down before touching it or use protective gloves.
A.4.1 - Cylinder replacement
•
•
•
•
•
•
Completely drain the water contained in the cylinder;
Turn the appliance off and open the disconnect switch on the mains power line (safety procedure);
Remove the steam hose from the cylinder;
Disconnect the electrical connections from the top of the cylinder;
Release the cylinder from the fastening device and lift it up to remove it;
Fit the new cylinder in the humidifier by performing the previous operations in reverse.
A.4.2 - Cylinder maintenance (see cylinder instruction sheet)
The life of the cylinder depends on several factors, including: the complete filling with lime scale and/or the partial or complete corrosion
of the electrodes, the correct use and sizing of the humidifier, the output and the quality of the water, as well as careful and regular
maintenance. Due to the aging of the plastic and the consumption of the electrodes, even an operable steam cylinder has a limited life
and it is, therefore, recommended to replace it after 5 years or 10,000 operating hours.
Important: the humidifier and its cylinder contain live electrical components and hot surfaces, and therefore all service and/or maintenance
operations must be performed by expert and qualified personnel, who are aware of the necessary precautions.
Before performing any operations on the cylinder, check that the humidifier is disconnected from the power supply; carefully read and
follow the instructions contained in the humidifier manual. Remove the cylinder from the humidifier only after having drained it completely.
Check that the model and the power supply voltage of the new cylinder correspond to the one being replaced.
A.4.3 - Periodical checks
•
•
•
•
•
A-3
After one hour of operation: for both disposable and openable cylinders, check that there are no significant water leaks.
Every fifteen days or no more than 300 operating hours: for both disposable and openable cylinders check operation, that there are
no significant water leaks and the general condition of the casing. Check that during operation there are no arcs or sparks between
the electrodes.
Every three months or no more than 1000 operating hours: for disposable cylinders,check operation, that there are no significant
water leaks and, if necessary, replace the cylinder; for openable cylinders, check that there are no markedly blackened parts on the
casing: if this is the case, check the condition of the electrodes and, if necessary, replace them together with the O-rings and the
cover gasket.
Annually or no more than 2500 operating hours: for disposable cylinders, replace the cylinder; for openable cylinders check operation,
that there are no significant water leaks, the general conditions of the container, check that there are no markedly blackened parts
on the casing; replace the electrodes together with the O- rings and the cover gasket.
After five years or no more than 10,000 operating hours: for both disposable and openable cylinders, replace the cylinder. After
extended use or alternatively when using water with a high salt content, the solid deposits that naturally form on the electrodes may
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Enclosure A - Electrode Humidifier
reach the stage where they also stick to the inside wall of the cylinder; in the event of especially conductive deposits, the consequent
heat produced may overheat the plastic and melt it, and, in more severe cases,puncture the cylinder, allowing water to leak back
into the tank.
As a precaution, check, at the frequency recommended further on, for deposits and the blackening of the wall of the cylinder, and replace
the cylinder if necessary.
Warning: always disconnect the appliance before touching the cylinder in the event of leaks, as current may be running through the water.
A.4.4 - Replacement and maintenance of other components
Fill solenoid valve: after having disconnected the cables and the tubing, remove the solenoid valve and check the condition of the inlet
filter; clean if necessary using water and a soft brush.
Supply and drain manifold: check that there are no solid residues in the cylinder attachment, remove any impurities. Check that the gasket
(O- ring) is not damaged or cracked; if necessary, replace it.
Drain pump: disconnect the power supply, remove motor body unscrew the fastening three screws; remove any impurities and rinse.
Supply tank & conductivity meter : check that there are no obstructions or solid particles and that the electrodes for measuring the
conductivity are clean, remove any impurities and rinse.
Hose kit: check that the hoses are free and do not contain impurities; remove any impurities and rinse.
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Enclosure B - Technical data table
Tab. 1 - Electrical data with premium fan module
DIGITAL SCROLL Cooling System
Configuration
Cooling Fan(s) +
Compressor(s)
Cooling + Electrical
heaters (Dehumidification)
Fan(s) + Compressor(s)
+ Electrical heaters
Cooling + Electrical
heating + Humidification
Fan(s) + Compressor(s)
+ electrode or infrared
humidifier
Model
PX082
PX094
PX104
PX120
PX150
PX165
PX082
PX094
PX104
PX120
PX150
PX165
PX082
PX094
PX104
PX120
PX150
PX165
Power supply
400 V /
3 Ph + N /
50 Hz
+ earth
400 V /
3 Ph + N /
50 Hz
+ earth
400 V /
3 Ph + N /
50 Hz
+ earth
FLA
[A]
LRA
[A]
Residual- Current Circuit Breakers
Inn = 0.3A (400V)*
73
73
77
101
142
160
76
76
78
101
174
192
87
87
91
115
156
173
148
174
172
219
250
300
148
174
172
219
283
332
148
174
172
219
264
313
100A “C”
100A “C”
100 A “C”
125 A “C”
160 A “C”
200 A “C”
100A “C”
100A “C”
100A “C”
125A “C”
200A “C”
200A “C”
100A “C”
100A “C”
125A “C”
125A “C”
160 A “C”
200 A “C”
min./max. Cu
cable size
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
10..70mm2
* ATTENTION Only universal (type B, B+) RCD protective devices are permitted.
NOTES:
•
The cables have to be sized in compliance with local standards and according to the type and characteristics (e.g. Amperes) of installation.
•
The data in the tables do not consider the absorbed current from the condensate pump and for other options not explicitly described.
•
The specific energy allowed to flow from the circuit breakers, installed by the user, must be lower than 300.000A2 x s.
•
Prescriptions on the differential relay required to the user:
•
for special places (healthcare facilities, etc...) comply with the local regulations;
•
For ordinary places, a low sensitivity is suggested (300 mA) coordinated with the value of the ground heater (IEC 364): Ra 50/Ia (Art. 413.1.4.1, CEI 648 or IEC60364445);
•
In case of frequent over-voltages with mains impulse, it is advisable to install a selective differential and to evaluate the need for adopting other devices;
•
The FLA is for units without the options of condensate pump and condensing unit;
•
The FLA is for units with AUTOMATIC FUNCTIONS only: in manual mode operation the FLA must be lower than the max. current of the main switch.
Tab. 2 - EC fan connections
Model
version with premium fan module
PX082 A
PX094 A
PX104 A
PX120 A
PX150 A
PX165 A
STD
8,3
9
9,4
9,4
7,9
9,6
EC Fan signal [VDC]*
Downflow Up
Downflow Down
Dehumidification
STD
Dehumidification
7,3
8
7
8
8,6
7,6
8,4
8,9
7,9
8,4
8,9
7,9
6,9
7,5
6,5
8,6
8,9
7,9
NOTE:
The EC fan settings can be modified acting on the control display (see Control manual).
(*) Setting for Nominal Airflow at standard conditions, Filters class F5, ESP: Downflow Up 20 Pa; Downflow Frontal 0 Pa.
Tab. 3 - Electrical data (standard components)
Component
Model
version with
premium fan
module
PX082 A
PX094 A
PX104 A
PX120 A
PX150 A
PX165 A
EC Fan (400V / 3Ph / 50Hz)
Downflow Up
Downflow Down
LRA
Nominal power*
Nominal power*
OA* [A] FLA [A]
OA* [A] FLA [A] LRA [A]
[A]
[kW]
[kW]
3x2.63
3x5
3x0.1
3x1.73
3x2.35
3x5
3x0.1
3x1.54
3x3.21
3x5
3x0.1
3x2.13
3x2.87
3x5
3x0.1
3x1.9
3x3.54
3x5
3x0.1
3x2.35
3x3.16
3x5
3x0.1
3x2.1
3x3.55
3x5
3x0.1
3x2.36
3x3.16
3x5
3x0.1
3x2.1
4x3,18
4x7,4
4x0,1
4x2,06
4x2,82
4x7,4
4x0,1
4x1,81
4x5,72
4x7,4
4x0,1
4x3,76
4x4,66
4x7,4
4x0,1
4x3,09
(*) At standard operating conditions, Filters class F5, ESP: Downflow Up 20 Pa; Downflow Frontal 0 Pa.
(**)At nominal operating conditions: Condensing temperature 450C - Room conditions 24C / 50% RH
B-1
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Enclosure B - Technical data table
Component
OA** [A]
FLA [A]
16.56+16.5
15+14.90
21.76+21.85
28.14+24.76
36,63+30,77
35.89+45.38
2x15+2x15
2x15+2x15
2x16.20+2x16.2
2x22+2x21
2x31+2x25
2x34+2x31
Model
version with
premium fan
module
PX082
PX094
PX104
PX120
PX150
PX165
COMPRESSOR
(400V / 3Ph / 50Hz)
Nominal power**
LRA [A]
[kW]
Digital
Scroll
2x75+2x75
9.35+9.29
2x101+2x101
10.68+10.64
2x101+2x101
11.2+11.22
2x118+2x111
14.82+12.72
2x140+2x118
19,53+16,77
2x174+2x140
19.08+22.89
Winding resistance
(Ohm)
(2.26+2.27)+(2.26+2.27)
(1.79+1.79)+(1.79+1.79)
(1.79+1.79)+(1.79+1.79)
(1.23+1.24)+(1.47+1.36)
(1,11+1,11)+(1,23+1,24)
(0,83+0,83)+(1,11+1,11)
(*) At standard operating conditions, Filters class F5, ESP: Downflow Up 20 Pa; Downflow Frontal 0 Pa.
(**)At nominal operating conditions: Condensing temperature 450 C - Room conditions 360 C / 24% RH
Tab. 4 - Electrical data (optional components)
ELECTRICAL HEATING
COMPONENT
Std. Capacity
Model
FLA Nominal power
[A]
[kW]
ELECTRODE HUMIDIFIER
Opt. High Capacity
FLA
[A]
Nominal power
[kW]
PX082
32.5
22.5
PX094
32.5
22.5
PX104
32.5
22.5
32.5
22.5
PX150
32.5
22.5
PX165
32.5
22.5
FLA [A]
CONDENSATE PUMP
Nominal power
[kW]
FLA [A]
Nominal power
[kW]
9.0
1.6
0.15
(400V / 3Ph / 50Hz)
PX120
10.8
7.5
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Enclosure B - Technical data table
Tab. 5 - Calibrations of electrical components
COMPONENT
SETTING
High Pressure transducer
(HP)
NOTES
CONTACT
Range 0-45 barg
Output 0-5 V
(see Control manual)
Low Pressure transducer
(LP)
High Pressure Switch
(HP)
Range 0-17.3 barg
Output 0-5 V
STOP
START
37.0
30.0
1 barg
1.5 barg
(see Control manual)
Reset
Normally
closed
(fixed setting - manual reset)
Clogged filter
differential pressure switch
(CF)
Normally
closed
Filter F5 = 3 mbar
Setting ring
Tab. 6 - Adjustments and calibrations of valves (see Enclosed D - Refrigeration circuits)
B-3
Component
Calibration &
Operating
Application
Electronic
expansion valve
Superheating
control
6 8K
Version with
EEV
Model
Drawing
ALCO EX5/6/7
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Enclosure B - Technical data table
Tab. 7 - R410A refrigerant and oil charge
MODEL
BASE REFRIGERANT
CHARGE (2)
[kg - each circuit]
Microchannel Coil
Condenser
PX082
PX094
PX104
PX120
PX150
PX165
25.4
25.4
26.9
26.9
27.7
30.7
BASE OIL CHARGE (1)
[Liter, oil within compressor,
each circuit]
initial oil
charge
2x1.8
2x1.8
2x1.8
2x3.25
2x3,8
2x3,5
Max topping up
Max System Refrigerant
Charge before oil addition
(3)
[kg – each circuit]
Oil to be added over the
Max System Refrigerant
Charge (3)
[Litre – each circuit]
13
13
13
13
13
13
a
a
a
a
a
a
2x1.7
2x1.7
2x1.7
2x3.14
2x3,14
2x3,14
a = (0.025 x (total refrigerant charge for each circuit [kg] - max system refrigerant charge before oil addition [kg])) + 0.09
Tab. 7a - Refrigerant pipe charge
EXTERNAL PIPE DIAMETER
(mm)
Gas
[kg/m]
14 x 1
16 x 1
18 x 1
22 x 1.5
28 x 1.5
35 x 1.5
0,0108
0,0147
0,0192
0,0271
0,0469
0,076
35.0° C
0,1142
0,1554
0,2030
0,2862
0,4956
0,812
liquid at different condensing temperatures (3)
R410A [kg/m]
46.0° C
0,1056
0,1438
0,1878
0,2648
0,4585
0,7512
57.0° C
0,0958
0,1304
0,1703
0,2402
0,4158
0,6812
(1) The recommended oil for units with R410A refrigerant is EMKARATE RL 32- 3MA.
(2) Total basic reference charge useful for unit coupled with the remote condenser suggested for ambient temperature up to 35°C, the
relevant liquid receiver (12.5 l) and the pumped refrigerant Econophase. With Smart Aisle application increase refrigerant charge up
to 10%. The correct charge must be precisely defined in field, starting with about 80% of the basic reference charge and following the
instruction given in para. 4.2.
(3) Topping up is requested for short pipeline too, due to the extra-charge of refrigerant.
NOTICE: Check oil level inside compressor, where compressor’s oil level sight glass is available, after 30 min. of compressor
running at maximum capacity: oil level must be between 1/2 and 3/4 of sight glass. In tandem compressors the oil level
must be checked with both compressors running at maximum capacity (note: when only one compressor is running, the oil
level inside the compressor that is not currently running could be at the minimum and the compressor, that is running, at the
maximum capacity; when one compressor is running at maximum capacity and one compressor is running in modulating
capacity, the oil level in the latter one could be between 1/2 and the minimum).
Note: The air conditioner is supplied pressurized with helium at 2 bar.
Tab. 7b - Condenser ambient selection per circuit, 350C room temperature.
Indoor model
PX082
PX094
PX104
PX120
PX150
PX165
35° C
MCL055
MCL055
MCM080
MCM080
MCL110
MCL165
Outdoor Design Ambient Max Temperature
40° C
MCL055
MCM080
MCM080
MCL110
MCL165
MCL165
Tab. 7c - Condenser refrigerant charge with 12.5 l liquid
receiver - as reference
Model
MCL055
MCM080
MCL110
MCL165
Charge
kg
12..9
14.4
17.8
22.6
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
46° C
MCM080
MCM080
MCL110
MCL110
MCL165
MCL165
Tab. 7d - Liebert EconoPhase module charge - as reference
Model
Charge per circuit, kg
PR 125
2.5
B-4
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Enclosure C - Installation drawings
Fig. 1 Overall dimensions and Service Area
DOWNFLOW DOWN
E*
D
D
G
G
DOWNFLOW UP
A*
Floor
Level
F
MAX 800
600
Floor
Level
Tab. 1 - Overall dimensions - Service area (referring to Fig. 1)
Unit
Downflow Downflow
Models
B
Up
Down
[mm]
A* [mm]
E* [mm]
PX082
PX094
2550
1970*
1370*
PX104
PX120
PX150
3350
2570
1970
PX165
Plenum
500- 600700- 800900
Options
AVAILABLE PLENUM HEIGHTS: D
[mm]
Plenum for silencing cartridges
Plenum for high efficiency filters
600- 900
600- 900
F (free space between unit bottom and basement):
max. 800 mm (base frame/legs kit availability)
min. 600mm (to get declared performances)
min. 300mm (minimum working conditions)
G (free space between ceiling and unit top or plenum top if installed):
min. 600mm (to get declared performances)
min. 300mm (minimum working conditions)
* In Downflow Up units with predisposition for damper and plenum installation (digit 18 = H or L) the unit is shipped with a connecting flange 50 mm high fixed on the unit top, so the unit is 50 mm
higher. If required, the flange can be removed by unscrewing the fixing screws (removing the side panel to access the screws head) and repositioned later.
C-1
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Enclosure C - Installation drawings
Fig. 2 Hole in the floor for Downflow versions
Downflow Up
Downflow Down
Tab. 2 - Hole in the floor for Downflow units, dimensions in mm
Configuration
Downflow Up
PX082 PX094 PX104 PX120
PX150
PX165
A
2450
3250
B
C*
A
760
70
2526
760
70
3326
B
840
840
C*
A
B
C*
A
B
C*
A
B
C*
30
2506
820
30
2532
846
20
2570
885
50
30
3306
820
30
3332
846
20
3370
885
50
Unit
With Base Frame **
With Legs kit **
Downflow Down
With floor tiles support kit **
* Minimal distance of the working unit from the back wall. Caution: In order to assemble and/or install accessories, a larger distance might be required. In that case, the unit can be moved in the
working position after installation / assembly procedures.
** Optional accessories - see details in Enclosures E.
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C-2
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Enclosure D - Refrigerant, hydraulic and electrical connections
Tab. 1 - Electrical data with basic fan module
PX082
Model
Unit Connection
CD
HF
Humidifier feed
IL2
OG1
OG2
PX104
PX120
PX150
PX165
ECONOPHASE
Refrigerant liquid
line inlet 1*
Refrigerant liquid
line inlet 2*
Refrigerant gas line
outtlet 1*
Refrigerant gas line
outlet 2 *
Condensate drain
IL1
PX094
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø18 mm
O.D. Ø22 mm
O.D. Ø22 mm
O.D. Ø22 mm
O.D. Ø28 mm
O.D. Ø28 mm
O.D. Ø28 mm
O.D. Ø22 mm
O.D. Ø22 mm
O.D. Ø22 mm
O.D. Ø28 mm
O.D. Ø28 mm
O.D. Ø28 mm
I.D. Ø20 [mm]
R ½ - ISO 7/1 (Electrode Humidifier), O.D. 6 [mm] (Infrared Humidifier)
HD
Humidifier drain
EC
Electrical power supply
EC aux
Low voltage cables
I.D. Ø32 [mm] (Electrode Humidifier), I.D. Ø22 [mm] (Infrared Humidifier)
Ø 48 [mm]
Ø 40 - Ø 36 [mm]
* Connection size only. The connecting pipe diameter depends on unit model, see Tab. 6 in par. 4.1.2
Fig. 1 - Refrigerant, water and electrical connections PX082-094-104-120 ECONOPHASE, top view
2550
102
HD/HF
890
CD
OG2
193
IL2
132,5
230
190
560
EC aux
480
IL1
OG1
132,5
215
193
EC
117
117
223
Fig. 2 - Refrigerant, water and electrical connections PX150-165 ECONOPHASE, top view
3350
86
86
118
193
OG2
118
193
279
IL2
279
890
579
EC aux
OG1
121
D-1
EC
IL1
579
CD
CD
121
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Enclosure D - Refrigerant, hydraulic and electrical connections
Fig. 3 - Refrigerant circuit EconoPhase version - Dual circuits - Tandem DIGITAL SCROLL compressors - EEV
15
15
T
T
11
11
ØE1
ØE2
6
6
16
16
MC
2
1
12
(FOR PX120)
T
20
ØB2
1
1
20
(FOR PX082-094-104)
12
T
T
(FOR PX120)
9
3
FG
6
20
(FOR PX082-094-104)
9
FG
18
MC
2
2
12
ØB1
TANDEM
MC
10
12
COMP.
COMP.
T
20
ØB2
ØD
10
2
1
ØD
COMP.
MC
ØB1
TANDEM
6
COMP.
6
3
6
18
6
6
19
19
8
ØC
ØA1
13
8
ØC
ØA2
17
13
6
6
17
13
13
SUPPLYING LIMIT
EXTERNAL TO PDX UNIT
Nr.
DESCRIPTION
6
ACCESS VALVE 5/16
20
NTC TEMPERATURE SENSOR FOR DIGITAL COMP.
3
HIGH PRESSURE SWITCH
19
ACCESS VALVE 1/4
2
CRANKCASE HEATER
18
HIGH PRESSURE TRANSDUCER
1
COMPRESSOR
17
CHECK VALVE 10 bar (145 psi)
16
LOW PRESSURE TRANSDUCER EEV
15
EVAPORATOR
PX082A
22
22
22
13
SHUT-OFF VALVE
PX094A
22
22
12
CHECK VALVE
PX104A
22
11
TEMPERATURE SENSOR FOR EEV
PX120A
28
10
ELECTRONIC EXPANSION VALVE EEV
PX150A
9
SIGHT GLASS
PX165A
8
FILTER DRYER
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
Model
ØA1 ØA2 ØB1 ØB2
ØC
ØD
ØE1
ØE2
22
18
18
28
28
22
22
18
22
28
28
22
22
22
18
22
28
28
28
22
28
18
22
28
35
28
28
28
28
18
22
35
35
28
28
28
28
18
22
35
35
D-2
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Enclosure E - Accessories
E.1 Kit Legs
E.2 Baseframe
Legs kit can be supplied on request to support Liebert® PDX when
installed with a raised floor. The legs are fixed with the unit frame
and allow to support the unit at different height, three kits are
available with different height: adjustable in the range: h1 30 - 370
mm; h2 370 - 570 mm; h3 570 - 800 mm.
A base frame can be supplied on request to support Liebert® PDX
when installed with a raised floor. The frame could be regulated
with a height from 120 mm to 800 mm and the unit is fixed on it.
E.3 Fresh air module
E.4 Vertical flow extension hood
Downflow
PX082 …120
The fresh air kit, optional, has a G3 class filter installed on the
intake side of the fan and is connected to the PDX unit with a 100
mm diameter plastic duct.
As the fresh air intake is positioned close to the fan suction, it will
easily mix with the recirculation air.
E-1
An extension hood can be supplied on request and can be installed
on top of the unit. It is available with different height:
500 mm; 600 mm; 700 mm; 800 mm; 900 mm. It has the same
design as the unit and consists of sandwich panels lined with
non-flammable insulation material of class 0 (ISO 1182.2), density
30 kg/m3.
Note:
In downflow units it is required a flange 50 mm high to connect the
extension hood to the unit (see E.10).
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Enclosure E - Accessories
E.5 Hood with high efficiency air filter
E.6 Plenum with silencing cartridges
Optional high efficiency filters, filtration class F6, F7 and F9 in
accordance with the CEN EN 779 standard, are made of fiberglass
filter media. The filters are placed in ”V” sections with a solid
external frame in polypropylene and can withstand remarkable
pressure and flow variations. These filters will be installed within an
additional duct on the unit top.
Note:
In downflow units it is required a flange 50 mm high to connect the
hood to the unit (see E.10).
These are special cartridges made of self - extinguishing material
with a high noise attenuation capacity. They are guaranteed against
disintegration and release of particles do to friction of the air.
Despite a small additional pressure drop, these cartridges provide
a remarkable sound power level reduction.
Note:
In downflow units it is required a flange 50 mm high to connect the
plenum to the unit (see E.10).
E.7 Horizontal hood with grill
E.8 Floor tiles support kit
A supply plenum with horizontal air flow can be installed on top of
the unit. The 600 mm high plenum has the same design as the unit;
it consists of sandwich panels lined with non-flammable insulation
material of class 0 (ISO 1182.2), density 30 kg/m3. It is equipped
with a double deflection grill.
Floor tiles support kit can be supplied on request to support tiles
around Liebert® PDX Downflow Down, when installed with a raised
floor. Floor tiles support is fixed on the unit frame/fan module
and allows to support tiles until 40 mm thickness. With a correct
installation, the maximum admitted vertical distributed load on the
perimeter is 180 kg/m.
I.e.: on the lateral side, 870 mm long, the maximum admitted
distributed load is 157 kg. Floor tiles support is earthed with the
unit frame. Follow local rules for system grounding.
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E-2
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Enclosure E - Accessories
E.9 Fans maintenance kit
Fans maintenance kit can be supplied on request to support tiles
on Liebert® PDX Downflow Down when installed with a raised floor.
Fans maintenance kit allows maintenance operations, in particular
fans replacement, when the fans are installed below the floor level.
Removing tiles on the frontal area, it is possible to lift some
footboards, moving them on the lower level, creating a service
volume in the raised floor.
With a correct installation, the maximum admitted vertical
distributed load is 600 kg/m2.
Footboards are designed to support distributed load as indicated
above, and the maximum concentrated load is
150 kg (on the area 50x50 mm). Fans maintenance kit must be
earthed following the local rules.
50
E.10 Connecting Flange
In Downflow Up, Downflow Down units with predisposition for
damper, economizer and plenum installation (digit 18 = H or L) the
unit is shipped with a connecting flange 50 mm high fixed on the
E-3
unit top, so the unit is 50 mm higher. If required, the flange can be
removed by unscrewing the fixing screws (removing the side panel
to access the screws head) and repositioned later.
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Enclosure F - Infrared Humidifier
F. 1 - Infrared Humidifier
The infrared humidifier design consists of quartz lamps mounted above a stainless steel water reservoir. The lamps never come in contact
with the water. When humidification of room air is required, infrared rays generate water vapor-without impurities or odor, within seconds.
In order to obtain optimum performance from the humidifier it is advisable to read this manual carefully.
Tab. 1 - Infrared Humidifier specifications
UNIT MODEL
PAN
MAIN POWER SUPPLIES
(V ± 10%)
NOMINAL CAPACITY
[kg/h]
ABSORBED CURRENT
[A]
POWER INPUT
[kW]
PX082...165
Stainless steel
400V / 3ph / 50Hz
10
13.9
9.6
F. 2 - Installation
The infrared humidifier is supplied already mounted within the air conditioner. The only necessary operations are the connections for the
supply water and drain water.
Supply Water.
•
•
•
Maximum water pressure 200 kPa
Size humidifier supply line for 3.8 l/min, with a minimum water pressure of 138 kPa
Do not supply de-ionized water to the humidifier
Drain Water.
•
This contains the same substances dissolved in the supply water, however in larger quantities;
•
It may reach a temperature of 100 ° C;
•
It is not toxic and can be drained into the sewerage system, category 3, EN 1717.
•
Dispose the drain hose into an ordinary drainage network. The drainage network should have a siphon and must be able to withstand
temperatures up to 100° C
F. 2.1 - Infrared humidifier components
1.
humidifier pan
6.
discharge connection
2.
humidifier standpipe
7.
supply line
3.
solenoid valve flow regulation
8.
manual reset thermostat
4.
float switch
9.
infrared bulbs
5.
junction block
Fig. 1 - The infrared humidifier and its components
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F-1
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Enclosure F - Infrared Humidifier
F. 3 - Start - up and operation
F. 3.1 - Start - up
Before using the humidifier, check the following:
•
Supply and drain connections.
•
That the cut- off tap is open.
•
All wiring.
•
Earthing.
To start the humidifier simply switch on the air conditioner, which will, in turn, automatically start and stop the humidifier as required. The
(adjustable) parameters which determine humidifier operation have already been factory- preset (see iCOM manual).
F. 3.2 - Operation
During normal humidifier operation, deposits of mineral solids will collect in the humidifier pan and on the float switch. These must be
cleaned periodically to ensure proper operation. Frequency of cleaning must be locally established because it depends on humidifier
usage and local water quality.
A spare pan is recommended to reduce maintenance time at unit. The Liebert auto-flush system can greatly increase the time between
cleanings, but does not eliminate the need for periodic checks and maintenance.
F. 4 - Maintenance
WARNING: Optical radiation; the humidifier components may be hot. Let it cool down before touching it or
use protective gloves.
The infrared humidifier contains live electrical components and hot surfaces and therefore all service and/or maintenance operations must
be performed by expert and qualified personnel, who are aware of the necessary precautions.
Before performing any operations, check that the humidifier is disconnected from the power supply; carefully read and follow the
instructions contained in the manual.
F. 4.1 - Cleaning Humidifier Pan and Float Switch
Before turning off unit:
1. With the unit operating, remove call for humidification at the Liebert iCOM control.
2. Let the blower operate 5 minutes to allow the humidifier and water to cool.
3. Turn the unit Off at the Liebert iCOM control.
4. Open the air conditioner door and remove safety panels, if installed.
5. Pull out the humidifier standpipe in pan.
6. Inspect the O- ring (replace if necessary).
7. Let the pan drain and the condensate pump operate (if applicable).
8. Disconnect power from the unit.
9. Disconnect the drain coupling from the bottom of the pan.
10. Remove the thermostat from the bottom of the pan and retaining screws from sides of pan.
11. Slide pan out.
12. Loosen scale on the side and bottom of the pan with a stiff nylon brush or plastic scraper.
13. Flush with water.
14. Carefully clean the scale from the float switch (make sure to reinstall correctly; see Figure 2).
15. Reinstall the pan, thermostat, standpipe, drain coupling, cover and screws into the humidifier.
16. Operate the humidifier and check for leaks.
Fig. 2 - Correct orientation of float switch
Correct Switch Orientation
F-2
Incorrect Switch Orientation
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Enclosure F - Infrared Humidifier
F. 4.2 - Changing Humidifier Lamps
CAUTION: Touching quartz lamps with bare hands will severely shorten bulb life. Skin oils create hot spots on lamp surface.
Wear clean cotton gloves when handling lamps.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the humidifier pan (see F.4.1 - Cleaning Humidifier Pan and Float Switch, Steps 1 to 11).
Disconnect power from the unit.
At the humidifier, remove the screws and cover from the high- voltage compartment.
Disconnect one end of the purple jumper wires.
Using a continuity meter, locate the burned- out lamp.
Remove the lamp brackets under the lamps.
Loosen the two screws securing the lamp lead wires to the junction block.
Pull the bulb straight down and discard it.
Wrap the lead wires once around the new lamp’s metal ends. This will support the lamp and allow for thermal expansion. Insert the
lead wires into the junction block and torque the screws
10. Reassemble by reversing Steps 1 to 9.
F. 4.3 - Periodical checks
1.
2.
3.
4.
5.
6.
Check drain lines and trap for clogs
Check/clean pan for mineral deposits
Clean reflector
Check water make- up valve for leaks
Check humidifier lamps (replace if burnt out)
Check wire connections (inside humidifier box)
Tab. 2 - Infrared Humidifier-troubleshooting
Symptom
Possible Cause
Check or Remedy
Check water supply.
Humidifier pan not filling
Check fill valve operation
Check drain stand pipe adjustment
Check for clogged waterline
No humidification
Control not calling for humidity
Check monitor status
Humidity contact not pulling in
Check visually. If contact is made, check line voltage after contactor and fuses
or CBs.
Check for open humidifier safety stat
Humidifier bulb burned out
Replace bulb. Loosen lead on old bulb. Trim excess lead length on new bulb to
avoid shorts.
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Enclosure G - Ultrasonic Humidifier
G. 1 - Ultrasonic Humidifier
Ultrasonic Humidifier operates on the principle of ultrasonic nebulization. A 48 VAC voltage is rectified on an oscillator circuit and
transformed into a high frequency signal of 1.65MHz.
This signal is transmitted to a transducer installed in the water which then transforms the signal into high frequency automatic vibrations.
The built-in transducers - also called ”thickness transducers” - change their thickness 1.65 million times per second in accordance with
the signal of 1.65 MHz applied.
Ultrasonic Humidifier can work only with demineralized water with conductivity < 5 μS/cm(up to 20 μS/cm for a short time).
If demineralized water is not available, provide demineralizer (not supplied).
Ultrasonic Humidifier is controlled by a microprocessor-based electronic controller.
It includes control board, driver board and remote display board, all of them housed inside the humidifier electrical panel, located behind
Liebert® PDX door.
The functioning logic of the Ultrasonic Humidifier is PROPORTIONAL. The controller comes complete with DSP card which allows to
display and modify all the parameters of the humidifier as well as to detect any abnormal condition via alarm messages.
For safety reason and in order to obtain optimum performance from the humidifier, this manual and the HSU08RM000 manual must be
read carefully
Tab. 1 - Ultrasonic Humidifier specifications
Humidifier Model
POWER SUPPLIES
(V AC)
SETTINGS
[kg/h]
NUMBER OF
TRANSDUCERS
ABSORBED POWER
[W]
HSU08RM000
48
0…6.0
16
670
G. 2 - Installation
The Ultrasonic humidifier is supplied mounted within one base module 400 mm height.
The base module with humidifier is supplied stand alone and it will be installed and connected with the air conditioner on field.
The module can be installed on the raised floor, see Fig. 1, or in the raised floor, see Fig. 2 (front and bottom module opened, sides and
back module closed).
When installed in the raised floor it is necessary to remove the module frontal panel to have also frontal air delivery.
A base frame, available on request, is required to support ultrasonic humidifier module.
Ensure 1 meter of free space (without obstacles) on ultrasonic humidifier module outlet.
For Extended Height unit, connect the fan module above the humidifier module and the coil module above the fan module.
Connect humidifier electrical cable, coming from the air conditioner, to the ultrasonic humidifier.
Connect water supply, water drain, safety overflow and humidifier drain pan water drain.
The relevant piping connections shall be in material resistant to fully demineralized water.
Refer to HSU08RM000 manual for details.
Fig. 1 - Ultrasonic humidifier module on the raised floor, frontal and lateral views
G-1
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
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Enclosure G - Ultrasonic Humidifier
Fig. 2 - Ultrasonic humidifier module in the raised floor, frontal and lateral views
Supply Water.
•
•
•
•
Supply fully demineralized water with conductivity<5 μS/cm. If demineralized water is not available, provided mineralizer (not
supplied);
Water pressure from 50 kPa to 500 kPa;
Water temperature from 8° C to 40° C;
Dust or dirt must not get into the water lines;
Refer to HSU08RM000 manual for details.
Drain Water.
•
•
•
The drain water contains the same substances dissolved in the supply water, however in larger quantities;
It is not toxic and can be drained into the sewerage system, category 3, EN 1717;
Dispose the drain hose into an ordinary drainage network (the drainage network should have a siphon).
Refer to HSU08RM000 manual for details.
G. 2.1 - Infrared humidifier components
1. Humidifier
2. Fan case
3. Mist guide cover
4. Fan
5. Metal plug
6. Cable
7. Metal plug
8. Cable
9. Water drain
10.
11.
12.
13.
14.
15.
16.
17.
18.
Safety overflow
Mist guide pipe
Ring and nut
Humidifier drain pan
Air filter
Water supply connection
Check valve (to be provided by the Customer)
Damper
Humidifier drain pan water drain
Fig. 3 - The Ultrasonic humidifier and its components
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
G-2
All manuals and user guides at all-guides.com
Enclosure G - Ultrasonic Humidifier
G. 3 - Start - up and operation
G. 3.1 - Start - up
Before using the humidifier, check the following:
•
Supply and drain connections.
•
That the cut- off tap is open.
•
All wiring.
•
Earthing.
To start the humidifier simply switch on the air conditioner, which will, in turn, automatically start and stop the humidifier as required.
The (adjustable) parameters which determine humidifier operation have already been factory-preset (see iCOM manual).
Refer to iCOM manual and HSU08RM000 manual for details.
G. 3.2 - Operation
Ultrasonic humidifier operates on the principle of ultrasonic nebulization.
The mist generated in the water tank by means of the transducer is blown into the room by the built-in fan. The humidifier consists of
nebulization modules, solenoid valve for the control of the supply water, float switch and a case that houses the fan.
Refer to HSU08RM000 manual for details.
G. 4 - Maintenance
If the humidifier is not used for a long period, the water must be drained off.
NEVER operate the humidifier without air supply.
Before performing any operations, check that the humidifier is disconnected from the power supply; carefully read and follow the
instructions contained in the manual.
G. 4.1 - Periodical checks
1.
2.
3.
4.
G-3
Check drain lines and trap for clogs
Check/clean pan for dust
Check wire connections (inside humidifier box)
Check status of humidifier air filters
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019
All manuals and user guides at all-guides.com
All manuals and user guides at all-guides.com
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© 2016 Vertiv Co. All rights reserved. Vertiv, the Vertiv logo and Vertiv Liebert HPF are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names,
trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co. assumes no responsibility, and
disclaims all liability, for damages resulting from use of this information or for any errors or omissions. Specifications are subject to change without notice.
Liebert® PDX, EconoPhase Version - UM - 265133 - 29.08.2019