Equipment Installation, piping & wiring
Variable Water Flow System
Objectives:
1. To be able to know the safety pre-caution for VWF
installation.
2. To be able to know the pre-installation requirements.
3. To be able to know the VWF unit mechanical &
electrical installation.
Safety
• Before installing/servicing this unit, technicians MUST put
on all Personal Protective Equipment (PPE) recommended
for the work being undertaken. ALWAYS refer to
appropriate MSDS sheets and OSHA guidelines for proper
PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS sheets and OSHA
guidelines for information on allowable personal exposure
levels, proper respiratory protection and handling
recommendations.
Unit Inspection
As soon as the unit arrives at the job site
•Verify that the nameplate data matches the data on the sales order
and bill of lading (including electrical data).
•Verify that the power supply complies with the unit nameplate
specifications.
•Verify that the power supply complies with the electric heater
specifications on the unit nameplate (applies only to units with
electric heaters).
•Visually inspect the exterior of the unit, including the roof, for signs
of shipping damage.
•Check for material shortages. Refer to the Component Layout and
Ship with Location illustration.
•If the job site inspection of the unit reveals damage or material
shortages, file a claim with the carrier immediately. Specify the
type and extent of the damage on the "bill of lading" before
signing.
•Visually inspect the internal components for shipping damage as
soon as possible after delivery and before it is stored. Do not
walk on the sheet metal base pans.
Model Number Description
C G D K100 2 H E A Z R N R R A C
1 2 3 4 5,6,7 8 9 10 11 12 13 14 15 16 17 18
Digit 1,2,3 — Unit Type
CGD= Digital Air-Cooled Water Chiller Refrigeration Circuit
Digit 4 R = Heat Pump K = Cooling Only
Digit 5-7 — Nominal Capacity (Tons) 100 = 6 120 = 8 150 = 10 175 = 12 200 = 14
Digit 8 — Voltage Selection 2 = 220V/60 Hz/3 ph 5 = 380V/50 Hz/3 ph
Digit 9— Airflow Configuration H = Horizontal
Digit 10— Refrigerant E = R-22
Digit 11 — Manufacturing Code (defaulted by factory) A = Double Compressors B =
Triple Compressors
Digit 12 — Central Controller Z = With Central Controller (as standard)
Digit 13 — Chilled Water Pump R = Water Pump
Digit 14 — Auxiliary Electric Heater in Water Circuit N = None
Digit 15 — Ambient Temperature R = Standard Ambient Temperature Set
(Standard)
Digit 16 — Water Pipe Direction (Face to the Airflow) R = Right Side (Standard) B =
Back Side (Optional)
Digit 17 — Design Sequence (Not for client) A = First Version B = Second Version
Digit 18 — Region V = China A = APR B = MAIR C = LAR
7
Unit Rigging and Placement
• Move the unit using a
forklift or crane of suitable
capacity.
• Rig the unit using canvas
belt.
•
Fasten the belt over the
units base.
• Failure to properly lift unit
could result in death or
serious injury.
8
Service and maintenance clearance
The unit should be installed
where there is adequate
ventilation.
9
10
11
Typical system installation
1. The indoor unit selected must be Trane networking indoor unit so
that normal system operation can be guaranteed.
2. Electric two-way valve must be installed at the outlet of each
indoor unit, the electric two-way valve selected must obtain in
Trane quality verification.
3. Standard length of the controller connecting cable is 7 m.
4. Communication cable type is AWG 18–22 twisted (shielded) pair
wire. If greater than 150 m is required, please specify in factory
order.
5. Electric heater is invalid for Cooling Only units. Total nominal
capacity of ID units is required to be less than 200% OD
nominal capacity.
13
14
PVC Pipe Installation Benefits
• PVC pipe and fitting price is 4 times cheaper than steel
pipe’s.
• PVC Pipe weight is 6 times less than steel pipe’s.
• Use smaller pipe size because friction loss of PVC pipe is
much less than steel pipe’s.
• Easy transportation, Easier and quicker installation,
longevity
15
PVC Pipe Installation Benefits
Size
½”
¾”
1”
1 1/4”
1 1/2”
2
2 1/2”
3”
3 1/2”
4”
5”
6”
16
PVC Class 13.5
(Kg/m)
0.22
0.265
0.417
0.542
0.7
1.075
1.712
2.375
3.852
5.0807
8.092
12.515
Steel Sch#40
(Kg/m)
1.26
1.68
2.50
3.39
4.06
5.48
8.66
11.3
13.7
16.2
22.0
28.5
Size Diff.
(time)
5.7
6.3
5.9
6.2
5.8
5.0
5.0
4.7
3.5
2.7
2.7
2.2
PVC Pipe Installation
17
Water flow of the outdoor unit
Recommended cable specification for
outdoor unit
Control System