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ACCESSORIES INSTALLATION
ENGLISH
3Way Valve(B)
3way valve(B) is required to operate Solar thermal system. Role of 3way valve is flow switching
between open and close mode of the solar circuit.
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 B means ‘heat source toward solar panel repeatedly’. (close mode of circuit)
(3) : Flow A means ‘heat source flow from solar panel to DHW tank in solar circuit’.
(open mode of circuit)
How to wire 3way valve(B)
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 (close solar circuit) from PCB to 3way valve
(U) : Live signal (open solar circuit) from PCB to 3way valve
(N) : Neutral signal from PCB to 3way valve
Type
Power
Operating Mode
Supported
SPDT
3-wire
(1)
220-240 V~
Selecting “Flow A” between
“Flow A” and “Flow B” (2)
Yes
Selecting “Flow B” between
“Flow A” and “Flow B” (3)
Yes
3way valve
(W)
(U)
(N)
3WAY VALVE
(B)
1
BR
L
2
WH
L1
3
BL
N
WARNING
!
• 3way valve should select “close solar circuit” when electric
power is supplied to wire (W) and wire (N).
• 3way valve should select “open solar circuit” when electric
power is supplied to wire (U) and wire (N).
Summary of Contents for THERMA V
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