Equipment Installation, piping & wiringVariable 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.

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Model Number DescriptionC G D K 1 0 0 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 VersionDigit 18 — Region V = China A = APR B = MAIR C = LAR

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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.

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Service and maintenance clearance

The unit should be installed where there is adequate ventilation.

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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.

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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

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PVC Pipe Installation Benefits

SizePVC Class 13.5 (Kg/

m)Steel Sch#40 (Kg/m

)Size Diff. (time

)½” 0.22 1.26 5.7¾” 0.265 1.68 6.31” 0.417 2.50 5.9

1 1/4” 0.542 3.39 6.21 1/2” 0.7 4.06 5.8

2 1.075 5.48 5.02 1/2” 1.712 8.66 5.0

3” 2.375 11.3 4.73 1/2” 3.852 13.7 3.5

4” 5.0807 16.2 2.75” 8.092 22.0 2.76” 12.515 28.5 2.2

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PVC Pipe Installation

Water flow of the outdoor unit

Recommended cable specification for outdoor unit

Control System