24
12.
2-
Way Valve
The role of 2-way valve 1 is to control the water flow into the underfloor loop. When “Floor Config” is set to
“With” for either cooling or heating operation, it will keep open. When “Floor Config” is set to “ Without”, it will
keep closed.
General
Information:
(1) Normal Open type. When electric power is NOT supplied, the valve is open. (When electric power
is supplied, the valve is closed.)
(2) Normal Closed type. When electric power is NOT supplied, the valve is closed. (When electric power
is supplied, the valve is open.)
(3) How to Wire 2-Way Valve:
Follow steps below to wire the 2-way valve.
Step 1. Uncover the front cover of the unit and open the control box.
Step 2. Find the terminal block and connect wires as below.
WARNING:
Normal Open type should be connected to wire (OFF) and wire (N) for valve closing in cooling mode.
Normal Closed type should be connected to wire (ON) and wire (N) for valve closing in cooling mode.
(ON) : Line signal (for Normal Open type) from PCB to 2-way valve
(OFF) : Line signal (for Normal Closed type) from PCB to 2-way valve
(N) : Neutral signal from PCB to 2-way valve
13.
3-
Way Valve
The 3-way valve 2 is required for the sanitary water tank. Its role is flow switching between the under floor
heating loop and the water tank heating loop.
General
Information
:
(1) SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow B), and Neutral (for
common).
(2) Flow A means 'water flow from the indoor unit to under floor water circuit'.
(3) Flow B means 'water flow from the indoor unit to sanitary water tank'.
Type
Power
Operating Mode
Supported
NO 2-wire
230V 50Hz ~AC
Closing water flow
Yes
Opening water flow
Yes
NC 2-wire
230V 50Hz ~AC
Closing water flow
Yes
Opening water flow
Yes
Type
Power
Operating Mode
Supported
SPDT
3-wire
230V 50Hz ~AC
Selecting “Flow A” between “Flow A” and “Flow B”
Yes
Selecting “Flow B” between “Flow B” and “Flow A”
Yes
