LG Multi V Water IV

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Water Circuit Installation

Due to our policy of continuous product innovation, some specifications may change without notification.

WATER CIRCUIT INSTALLATION

Piping System Specications

Variable Water Flow Valve Control Kit PWFCKN000 (Optional)

When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. LG recommends installing a

variable water flow control kit on each water source unit.

• Field-supplied modulating water control valve must be 24 volt, normally-closed.

• Minimum flow rate cannot be less than 40% of normal flow rate.

• Variable ow control kit sends 0–10 volt signal to the modulating valve. 10 volts is full open valve position. As building load drops and

compressor slows, the signal reduces to close the valve. 1 volt is the minimum ow position of 40% of rated ow. Zero volts is valve fully closed.

Figure 68: Variable Water Flow Valve Control Kit

Variable Water Flow Valve Control Kit Installation

Install the kit as follows:

WARNING

High voltages capable of causing death are used in this equipment. Remove water source unit input power

before performing this procedure. Failure to observe this warning can result in death or severe injury.

1. Remove power from the water source unit.

2. Install the transformer, I/O module, and terminal block inside the water source unit chassis. Secure

components with screws.

3. Connect component wiring as shown in Figure 68.

4. Position DIP switch 5 (function 4) to the ON position.

5. Reconnect water source unit power.

BL=blue; BR=brown; RD=red; BK=black; WH=white; GR=green

Note:

LG Multi V Water IV - Page 83