Accessories Installation
Installation Manual
63
ENGLISH
Final Check
• Flow direction :
- Water should flow from water outlet of the indoor unit to DHW tank water inlet when DHW tank
heating is selected.
- To verify the flow direction, check temperature at the water outlet of the indoor unit and water inlet
of DHW tank.
- If correctly wired, these temperatures should be almost equivalent if thermal insulation of water
pipe is well performed.
• Noise or water pipe vibration while 3way valve operation
- Due to surging effect or cavitation effect, noise or water pipe vibration can be occurred while
3way valve is operating.
- In that case, check followings :
• Is water circuit (both under floor water loop and sanitary water tank loop) fully charged? If not,
additional water charging is required.
• Fast valve operation yields noise and vibration. Appropriated valve operating time is 60~90
seconds.
• 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).
WARNING
How to Wire 3Way Valve
Follow below procedures Step 1 ~ Step 2.
Step 1.
Uncover front cover of the indoor unit and open the control box.
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
3way valve
(W)
(U)
(N)
3WAY VALVE
(A)
L
L1
N
1
2
3
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 63
