Way Valve - Sinclair STHERM SMH IRB Series Installation Manual

11. 3-Way Valve

The 3-way valve 2 is required for the sanitary water tank. Its role is flow switching between the under floor
heating loop and the water tank heating loop.
General Information
Type
SPDT
230V 50Hz ~AC
3-wire
(1) SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow B), and Neutral (for
common).
(2) Flow A means 'water flow from the indoor unit to under floor water circuit'.
(3) Flow B means 'water flow from the indoor unit to sanitary water tank'.
Follow steps below to wire the 3-way valve:
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the unit and open the control box.
Step 2. Find terminal block and connect wires as below.
• The 3-way valve should select water tank loop when electric power is supplied to wire (ON) and wire (N).
• The 3-way valve should select under floor loop when electric power is supplied to wire (OFF) and wire (N).
(ON): Live signal (Water tank loop) from the main board to the 3-way valve
(OFF): Live signal (Heating system) from the main board to the 3-way valve
(N): Neutral signal from the main board to the 3-way valve
Power
Selecting "Flow A" between "Flow A" and "Flow B"
Selecting "Flow B" between "Flow B" and "Flow A"
Operating Mode
9 10 11
3-Way Valve 2
ote
WARNING
29
Supported
Yes
Yes