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3-Way Valve
The 3-way valve 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
Selecting “Flow A” between “Flow A” and “Flow B”
Selecting “Flow B” between “Flow B” and “Flow A”
(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 (OFF) and wire (N).
• The 3-way valve should select under floor loop when electric power is supplied to wire (ON) and wire (N).
• (ON): Line signal (Water tank heating) from the main board to the 3-way valve
• (OFF): Line signal (Under floor heating) from the main board to the 3-way valve
• (N): Neutral signal from the main board to the 3-way valve
DHW Tank Temperature Sensor
Connecto toPCB AP1, terminal CN9-CN10
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