Accessories Installation
40 Air-to-Water Heat Pump
• 3way valve should select water tank loop when electric power is
supplied to wire (W) and wire (N).
• 3way valve should select under floor loop when electric power is
supplied to wire (U) and wire (N).
Mice can not be appeared to prevent entering the unit or attacking wires.
3way valve is required to operate sanitary water tank. Role of 3way valve is flow switching between
under floor heating loop and water tank heating loop.
General information
supports following 3way valve.
* SPDT : = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow A), Live 2 (for
selecting Flow B), and Neutral (for common).
** No. of terminal block
How to wire 3way valve
Follow below procedures Step 1 ~ Step 2.
Step 1. Uncover front cover of the unit.
Step 2. Find terminal block and connect wire as below.
(W) : Live signal (Water tank heating) from PCB to 3way valve
(U) : Live signal (Under floor heating) from PCB to 3way valve
(N) : Neutral signal from PCB to 3way valve
3Way Valve
Type
Power Water flow direction Wiring
SPDT
3-wire*
220-240 V~
From unit to under floor heating L1(9**) – N(10)
From unit to sanitary water tank L(8) – N(10)
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