100
ACCESSORIES INSTALLATION
(W) (H) (N)
3Way Valve(A)
3Way Valve(A) is required to operate DHW water tank. Role of 3way valve is flow switching
between space heating circuit and water tank heating loop.
General Information
supports following 3way valve.
1) SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow A),
Live 2 (for selecting Flow B), and Neutral (for common).
2) Flow A means ‘water flow from the unit to space heating circuit.
3) Flow B means ‘water flow from the unit to DHW water tank.’
How to wire 3way valve(A)
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.
Type
Power Operating Mode Supported
SPDT
1)
3-wire
220-240 V~
Selecting Flow A
2)
between Flow A and Flow B Yes
Selecting Flow B
3)
between Flow A and Flow B Yes
WARNING
!
• 3way valve should select water tank loop when electric power is supplied to wire (W) and
wire (N).
• 3way valve should select the heating circuit when electric power is supplied to wire (H) and
wire (N).
NOTE
Operation time of flow control valve(e.g. 3way valve or 2way valve) should be less than 90
seconds.
TB 1
(W) : Live signal (Water tank heating) from PCB to 3way valve
(H) : Live signal (Space heating) from PCB to 3way valve
(N) : Neutral signal from PCB to 3way valve
3way valve
12 13 14
L L1 N
3WAY VALVE (A)
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