110
ACCESSORIES INSTALLATION
ENGLISH
3Way Valve(A)
3Way Valve(A) is required to operate DHW water tank. Role of 3way valve is flow switching
between under floor heating loop and water tank heating loop.
Plus, it is required to operate 3
rd
party boiler.
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 under floor water 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.
(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
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
3way valve
(W)
(U)
(N)
3WAY VALVE
(A)
8
9
10
L
L1
N
WARNING
• 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).
!
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The terminal block connection number may differ depending on the model. Refer to the
“Wiring Diagram” in the SVC Manual.
3way valve
(W)
(U)
(N)
3WAY VALVE
(A)
7
8
9
L
L1
N
- For 3 Series
- For 4 Series