Installation check listConguration
System Design ApplicationsIntroduction
• Installing 2way v/v
2way valve is required to control water ow during cooling operation. Role of 2way valve is to cut off
water ow into under oor loop in cooling mode when fan coil unit is equipped for cooling operation.
2way valve is a eld provided and installed component and needs to be installed in strict compliance
with the installation manual.
Especially check if the valve is NO(Normal Open) or NC(Normal close) type before installing it and
also check for any leak after installing the valve.
Terminal block 2
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2
N
14 15 16
Normal Open type should be connected to wire (NO) and wire (N) for
valve closing in cooling mode.
(NO) : Live signal (for Normal Open type) from PCB to 2way valve
(NC) : Live signal (for Normal Closed type) from PCB to 2way valve
(N) : Neutral signal from PCB to 2way valve
*Power : 230V AC
• Example of 2Way valve(Field Scope)
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2
N
14 15 16
Voltage 220-240 V, 50 Hz
Protection class IP20
Starting position normally closed
temperature -40~65 °C
2way valve
(NO) (NC) (N)
2WAY VALVE
(A)
L1 L2
N
14 15 16
Wire Function
a = brown Line(Power supply)
b = blue neutral
c = green / yellow earth (ground)
• Installer setting
Press ‘up’ for 3 sec
Enter installer setup mode, then go to,
water supply off temp.during cooling
menu to set whether to use FCU and
temperature to prevent dewing.
028 029
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COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
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