LG Multi V Water V ARWM072CAS5 Engineering Manual page 31

WATER CIRCUIT INSTALLATION
Piping System Specifications
Variable Water Flow Valve Control Kit for Triple Frame
Figure 23: Variable Water Flow Valve Control Kits for Triple Frame
S hutoff Valv e S hutoff Valv e S hutoff Valv e
Thermometer Thermometer Thermometer
Pressure Pressure Pressure
G auge G auge G auge
Valv e Power ( 24V)
S erv ice S erv ice S erv ice S erv ice
and Control
Valv e Valv e Valv e Valv e
M odulating
Control
Valv e
1
Flow
S witch
50 M esh
S trainer
PWFCK N000 50 M esh
1
S trainer
S hutoff S hutoff
Flex
Valv e Connector Valv e
1 Variable Water Flow Valv e Control K it PWFCK N000 controls operation of the
field-supplied M odulating Control Valv e. The v alv e must be 24 v olt, normally -closed.
© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. "LG" is a registered trademark of LG Corp.
56 | LOOP CIRCUIT DESIGN
Condenser Water S upply
Condenser Water Return
S hutoff Valv e S hutoff Valv e S hutoff Valv e
Thermometer Thermometer Thermometer
Pressure Pressure Pressure
G auge G auge G auge
Valv e Power ( 24V) Valv e Power ( 24V)
S erv ice S erv ice
and Control and Control
Valv e Valv e
M odulating M odulating
Control Control
Valv e Valv e
1
Flow Flow
S witch S witch
PWFCK N000 50 M esh
1
S trainer
S hutoff
Flex Flex
Connector Valv e Connector
Water Piping System Installation
If water temperature is maintained at 68°F in winter and 86°F in summer, insulation is not required. Water pipe insulation is suggested if the
following conditions exist:
• Water pipe is subject to freezing.
• Water pipe is located where water can condense on the surface of the pipe from ambient room temperatures higher than the temperature of
the water in the pipe.
• Boiler piping (to save energy losses from the boiler).
• Where required by local codes.
Open Tower Design Schematic
When using an open cooling tower or open geothermal wells, an intermediate heat exchanger is recommended to be installed to protect the
water source unit from contamination.
Figure 24: Open Tower Design Schematic – Requires Intermediate Heat Exchanger
E x pansion Tank
1
PWFCK N000
1
Refrigerant
© LG Electronics Canada, Inc., North York, ON Canada. All rights reserved. "LG" is a registered trademark of LG Corp.
WATER CIRCUIT INSTALLATION
Piping System Specifications
Intermediate Water
H eat E x changer
V1
T1
M ulti V
Water IV
Unit
H eat E x changer
( Plate Ty pe)
Boiler
Pump
V2
T2
Open Cooling Tower
Control Panel
LOOP CIRCUIT DESIGN | 57