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ACCESSORIES INSTALLATION
116
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
General Information
supports following 3way valve.
Type
Power
SPDT
1)
220-240 V~
3-wire
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.
- For 3 Series
8
L
3WAY VALVE
(W)
3way valve
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).
(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
h The terminal block connection number may differ depending on the model. Refer to the
"Wiring Diagram" in the SVC Manual.
rd
party boiler.
Operating Mode
Selecting Flow A
Flow A and Flow B
Selecting Flow B
Flow A and Flow B
9
10
L1
N
(A)
(U)
(N)
2)
between
between
3)
- For 4 Series
7
8
L
L1
3WAY VALVE
(A)
(W)
(U)
3way valve
Supported
Yes
Yes
9
N
(N)
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