Sinclair GSH-100ERA series, Operational Manual

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AIR-TO-WATER HEAT PUMP INSTALLATION MANUAL
13. 2-Way Valve
2-way valve is required to control water flow while cooling operation. Role of 2-way valve is
to cut off water flow into under floor loop in cooling mode when fan coil unit is equipped for
cooling operation.
General Information
Type Power Operating Mode Supported
Closing water flow Yes
NO 2-wire 230V 50Hz
～
AC
Opening water flow Yes
Closing water flow Yes
NC 2-wire 230V 50Hz
～
AC
Opening water flow Yes
(1) : Normal Open type. When electric power is NOT supplied, the valve is open. (When
electric power is supplied, the valve is closed.)
(2) : Normal Closed type. When electric power is NOT supplied, the valve is closed. (When
electric power is supplied, the valve is open.)
How to Wire 2-Way Valve
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the indoor unit and open the control box.
Step 2. Find terminal block and connect wire as below.
3
2 1
2 w a y v a lu e 1 2 w a y v a lu e 2
4 5
6
O F F
O N
N
O F F
O N
N
N C
N O
N
N
N C
N O
•
Normal Open type should be connected to wire (NO) and wire (N)for valve closing in cooling
mode.
• Normal Closed type should be connected to wire (NC) and wire (N)for valve closing in
cooling mode.
(NO) : Line signal (for Normal Open type) from PCB to 2-way valve
(NC) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
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