Way Valve - Sinclair STHERM SMH IRB Series Installation Manual

10. 2-Way Valve

The role of 2-way valve 1 is to control the water flow into the underfloor loop. When "Floor Config" is set to "With"
for either cooling or heating operation, it will keep open. When "Floor Config" is set to " Without", it will keep closed.
General Information
Type
NO 2-wire
NC 2-wire
(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.)
(3) How to Wire 2-Way Valve:
Follow steps below to wire the 2-way valve.
Step 1. Uncover the front cover of the unit and open the control box.
Step 2. Find the terminal block and connect wires as below.
• Normal Open type should be connected to wire (OFF) and wire (N) for valve closing in cooling mode.
• Normal Closed type should be connected to wire (ON) and wire (N) for valve closing in cooling mode.
(ON) : Line signal (for Normal Open type) from PCB to 2-way valve
(OFF) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
Power
230V 50Hz ~AC
230V 50Hz ~AC
3 4 5
2-Way Valve 1
Operating Mode
Closing water flow
Opening water flow
Closing water flow
Opening water flow
3 4 5
2-Way Valve 1
ote
WARNING
28
Supported
3 4 5
2-Way Valve 1
Yes
Yes
Yes
Yes