MODUCEL ROOFTOP PACKAGED AIR HANDLING UNITS
AN INTEGRATED
CONTROL SYSTEM
MODUCEL PACKAGED AIR HANDLING UNITS
Eaton-Williams MODUCEL® range of air handling equipment now includes a standard
range of rooftop packaged units with DX cooling and integrated controls.
The DX direct evaporator technology uses R410A refrigerant. Our single and dual
tandem scroll compressors have capacity control and improved part load efficiency
that can provide a significant reduction in energy use and CO2 emissions.
The Cooling Circuit
Controls
R410A refrigerant is used extensively
in new small air cooled systems,
single and tandem scroll compressors.
R410A has a Zero Ozone Depletion
Potential (ODP).
The control panel fitted within the
unit includes an intuitive keypad
display screen and is completely
wired and programmable.
The characteristics of R410A enables
the use of a smaller displacement
compressor, less area coil and less
refrigerant while maintaining system
efficiencies that are comparable to
other refrigerants.
The controls are a Carel type PC05
controller with a PGD1 keypad display.
There is an extensive range of
graphical displays and connectivity
solutions and the controller can be
integrated into various third-party
supervisor systems and Building
Management Systems (BMS).
The controller supports the following:
HTTP/SNMP/FTP/Web Server • Modbus • LonWorks • BACnet
System Advantages
•
Fully integrated controls
•
Simple installation
•
Energy efficient using either thermal wheel or recuperator
•
No external refrigeration pipework
•
Variety of applications
•
Built for UK conditions
•
Manufactured in the UK
CONTROL SYSTEM
The control system is housed within the unit containing Carel’s latest PC05 controller
and PGD1 keypad display. It is fitted within a door mounted IP65 rated enclosure,
complete with inspection window.
The PCO controller can communicate with all the supervisory systems present in the
market and with Multi Function Technology (MFT) actuators. It comes as standard
as a 2-10 VDC proportional control which can be reprogrammed on-site. Voltage
control, time proportional control, floating point, on/off and feedback signals can
also be modified.
In addition, MFT makes it easy to set parameters for running time, mechanical
working range, address, status and diagnostics.
Control System Benefits
•
Fully programmable
•
Extensive range of graphical displays
•
Various connectivity solutions
•
Flexible inputs/outputs
•
Reduced installation costs
•
Pre-commissioned
Main Modules Managed by the Standard Application
•
Modulating fan management 0-10VDC for EC fans
•
Temperature regulation
•
Heat recovery via thermal wheel or recuperator
•
Free cooling mode
•
Dehumidification
•
Alarm management and history
•
Damper control
•
BMS connectivity
•
0-10V signals for DX Cooling
THERMAL WHEEL
COIL AIR ON 27oC/50% RH
Unit size
Size 01
Size 02
Size 03
Size 04
Size 05
Size 06
Size 07
Airflow m3/s
0.56
0.98
2.16
2.81
3.45
5.55
6.43
Total coil duty kW
10.64
19.48
28.98
42.66
47.88
64.70
68.50
Total coil sensible duty kW
7.88
14.15
25.99
35.61
42.09
62.99
66.69
Total coil latent duty kW
2.76
5.32
2.98
7.04
5.79
1.70
1.80
SHR
0.74
0.73
0.90
0.83
0.88
0.97
0.97
Supply fan motor FLC (amps)
1x4
1x4
1x5.6
1x5.4
2x5.8
2x5.4
2x8.0
Supply fan motor rating kW
1x2.5
1x2.5
1x3.5
1x3.4
2x3.5
2x3.4
2x5.0
Extract fan motor FLC (amps)
1x4
1x4
1x5.6
1x5.4
2x2.9
2x5.4
2x5.4
Extract fan motor rating kW
1x2.5
1x2.5
1x3.5
1x3.4
2x1.8
2x3.4
2x3.4
Refrigeration section FLC (amps)
8.55
16.70
21.40
34.40
38.20
47.90
56.30
Total FLC (amps)
16.55
24.70
32.60
45.20
55.60
69.50
83.10
1
1
2
2
2
2
2
1x1
1.5x1
2x1.5
2.5x1.5
3x1.5
3.5x2
4x2
673 x 1636
x 3460
973 x 1636
x 4160
1273 x 2246
x 4960
1573 x 2246
x 5760
1905 x 2360
x 5816
2215 x 2970
x 6316
2530 x 2970
x 6316
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
55mm
Steel Frame
+ 40mm Panels
55mm
Steel Frame
+ 40mm Panels
55mm
Steel Frame
+ 40mm Panels
882
1189
1868
2357
3148
4143
4519
Compressors
Unit Size
Width x Height
(includes base) x Length
Construction
Unit weight kg
Exhaust
Fresh Air
Supply
RECUPERATOR
COIL AIR ON 27oC/50% RH
Unit size
Size 01
Size 02
Size 03
Size 04
Size 05
Size 06
Size 07
Airflow m3/s
0.56
0.98
2.16
2.81
3.45
5.55
6.43
Total coil duty kW
10.64
19.48
28.98
42.66
47.88
64.70
68.50
Total coil sensible duty kW
7.88
14.15
25.99
35.61
42.09
62.99
66.69
Total coil latent duty kW
2.76
5.32
2.98
7.04
5.79
1.70
1.80
SHR
0.74
0.73
0.90
0.83
0.88
0.97
0.97
Supply fan motor FLC (amps)
1x4
1x4
1x5.6
1x5.4
2x5.8
2x5.4
2x8.0
Supply fan motor rating kW
1x2.5
1x2.5
1x3.5
1x3.4
2x3.6
2x3.4
2x5.0
Extract fan motor FLC (amps)
1x4
1x4
1x5.6
1x5.4
2x2.9
2x5.4
2x5.4
Extract fan motor rating kW
1x2.5
1x2.5
1x3.5
1x3.4
2x1.8
2x3.4
2x3.4
Refrigeration section FLC (amps)
8.55
16.70
21.40
34.40
38.20
47.90
56.30
Total FLC (amps)
16.55
24.70
32.60
45.20
55.60
69.50
83.10
1
1
2
2
2
2
2
1x1
1.5x1
2x1.5
2.5x1.5
3x1.5
3.5x2
4x2
673 x 1636
x 3660
973 x 1636
x 4260
1273 x 2246
x 5160
1573 x 2246
x 5960
1905 x 2360
x 6116
2215 x 2970
x 7116
2530 x 2970
x 6916
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
40mm
Alum Frame
+ 25mm Panels
55mm
Steel Frame
+ 40mm Panels
55mm
Steel Frame
+ 40mm Panels
55mm
Steel Frame
+ 40mm Panels
871
1149
1849
2311
3167
4365
4586
Compressors
Unit size
Width x Height
(includes base) x Length
Construction
Unit weight kg
Fresh Air
Exhaust
Supply
UNIT SPECIFICATION
General Construction
The unit sections comprise a chassis frame of extruded
aluminium or steel pentapost section with aluminium
corner pieces.
The flush mounted double skinned panels are
constructed of 0.9mm Plastisol, outer and with 1mm
galvanised inner panels.
Panel thicknesses of 25mm or 40mm are manufactured
with 45kg/m3 mineral wool insulation (‘K’ value 0.034
WmK). Fixed panels are secured internally using gaskets
and plated drill screws.
Removable panels are secured externally using gaskets
and plated drill screws. Fixings are self-drilling type,
carbon boron steel to BS 3111 part 1, type 9 1987
standard and case hardened to specification IF 113.
Access doors are fitted with rubber seals and hinged. Air
leakage meets the HEVAC, Class A or Class B standard.
Our casing insertion losses are;
HZ
dB
63
13
125
18
250
32
500
42
1K
47
2K
38
4K
44
8K
48
Drain trays are galvanised steel with a minimum 1:20
slope to the 1” BSP outlet connection. It is the
responsibility of the contractor to ensure that sufficient
height is available below the drain connection, to
accommodate correct trap heights.
Unit Supports
Filter Section
Unit supports will be formed bases manufactured from
3mm thick galvanized steel.
The filter section is manufactured from chassis frame and
cover panels as previously described, and are provided
with special purpose holding frames, suitable for side
withdrawal, to accept the type of filter being used.
Heater Batteries (LPHW)
Heater battery fin blocks are manufactured from ½” O/D
seamless copper tube (0.46mm wall thickness) on to
which 0.15mm thick aluminium fins are mechanically
bonded. The copper tubes are brazed into copper headers
fitted with BSP male screwed connections.
The heater battery is circuited in a contra-flow
arrangement, with the connections on one side only. The
battery casing is manufactured from 14 or 16 gauge
galvanised steel folded to a rigid section enclosing both
‘U’ return bends and flow/return headers. Batteries are
tested with nitrogen under water to 24 bar.
Plug Fan Section
The fan section is constructed from chassis frame and
cover panels as previously described, and incorporates a
SISW backward curved impeller driven by means of a EC
metric motor.
The fan and motor is mounted on a sub frame and
isolated from the unit casing with spring anti-vibration
mountings and flexible connection off the fan inlet. Plug
fans with EC motors comply with Precision Class 2 in
accordance with DIN 24 166.
Standard - Supply F7 bag
- Extract G4 bag
Weatherproof Units
The component sections are factory assembled on a
formed base. The top of the complete unit is covered by
a pitched roof providing wet weather protection.
Fresh air intake and exhaust air outlets are fitted with
galvanised opposed blade dampers with aerofoil section
double skin blades. Hoods, complete with bird-mesh wire
screen are available as an option, if not ducted away.
Access doors are provided where required. Lifting points
are fitted as standard.
UNIT SPECIFICATION
Thermal Wheel Section
PCO5+
The thermal wheel section is constructed from chassis
frame and cover panels, as previously described.
The PCO5+ controller offers multi functions including
free cooling and heat recovery via thermal wheel or
recuperator, temperature regulation, dehumidification,
damper control, DX cooling, alarm management and
history. The controller can be interfaced to the more
widely-used Building Management Systems (BMS),
such as MODBUS®; BACnet; LON; HTTP/SNMP/FTP/Web
Server, and can be integrated into proprietary
supervisory systems.
Air leakage between wheel and casing is minimised with
a brush sealant mounted on the wheel allowing easy
adjustment and longer life time. The two air streams are
separated with easy adjusted brush sealant. The unit is
fitted with a purge sector and MicroMax controller.
The drive belt is a standard self -tensioned welded
round belt.
There are individual speed adjusters for supply and extract
fans which can be easily set up for site commissioning.
Plate Recuperator Section
The plate recuperator section is constructed from a chassis
frame and cover panels. It incorporates a cross flow plate
recuperator selected to suit the supply and extract air
volumes and conditions.
Recuperators are constructed from high purity aluminium
plates that are retained within a galvanised sheet steel
casing.
Recuperators are fitted with a combined face/bypass
damper requiring a single actuator (face opens as bypass
closes and vice-versa). A drain tray is provided in the
extract air stream to catch any condensate.
The recuperator plates are designed and spaced to offer
optimum heat reclaim with negligible risk of the core
blockage by contaminants in the airstream.
Electrical Section
The control and switch gear is located on a chassis fixed
behind the access door. MPCBs and MCBs are provided
on all components to protect against electrical damage
and provide feedback of any problems to the
microprocessor controller.
Controls
PGD1 Keypad Display
132x64 pixels, panel mounted with buzzer alarm
protected within IP65 inspection window.
The user interface is designed with semi-graphic LCDs
which offers greater versatility and possibility of
customisation. The LCDs display graphic symbols of
various sizes in all main international alphabets.
DX Cooling Section
Condenser Fans
EC direct drive axial fan(s) are mounted at high level
complete with pressure actuated fan speed controller.
Sickle shaped profile blades designed with a ‘toothed’
bionic profile are optimised for full bellmouth plate to
provide maximum efficiency
The single phase fans are 100% speed controllable
with IP54 protection and internal safety thermostat
as standard.
DX Cooling Coils
The cooling coil is constructed from copper tubes with
mechanically bonded aluminium fins. The fins have a
hydrophilic coating to provide efficient heat transfer and
rapid condensate removal and the inner surface of the
copper tubes are grooved to maximise efficiency and
heat transfer. Condensate is collected in a galvanised
steel drip tray.
Refrigerant coils are supplied complete with expansion
valve, sight glass, drier/filter and charging shrader.
Compressors
Single cooling stage units (size 1 and 2) are supplied with
one R410A hermetic scroll compressor complete with oil
crankcase heater, pipe work anti-vibration anaconda
elements and low / high pressure safety switches are
fitted as standard.
Dual cooling stage units (size 3 to 7) are fitted with
tandem R410A hermetic scroll compressors.
UNIT SPECIFICATION
We reserve the right to alter specifications without notice and products will
sometimes be supplied with modifications which do not strictly comply with the
descriptions and illustrations in this publication. FLEXAIRE®, VAPAC®, QUALITAIR®
AND EATON-WILLIAMS® are registered trade marks.
Eaton-Williams Group Limited
Fircroft Way, Edenbridge
Kent TN8 6EZ, England
T: +44 (0)1732 866055
F: +44 (0)1732 863461
W: eaton-williams.com