Air-to-water Heat Pump Split Versati
31
SPLIT TYPE
NOTE
•
Never use 230V AC and 24V AC thermostat at the same time, otherwise, it will cause short circuit and power cut-off
by the circuit breaker;
• Setting temperature by the thermostat(heating or cooling) should be within the temperature range of the product;
• For other constrains, please refer to previous pages about the remote air temperature sensor;
•
Do not connect external electric loads. Wire 230V AC(24V AC) and 230V GND(24V GND) should be used only for the
electric thermostat;
•
Never connect external electric loads such as valves, fan coil units, etc. If connected, the mainboard of the unit can be
seriously damaged;
•
Installation of the thermostat is very similar to that of the remote air temperature sensor.
• “OFF” interfaces can be kept vacant and no adverse effect will be produced for nomrla operation. When signals for
both heating and cooling are not detected, it can be considered the thermostat is “OFF”.
11. 2-Way Valve
The 2-way valve 1 is required to control water flow for cooling or heating operation. The role of 2-way valve 1 is
to cut off water flow into the underfloor loop when the fan coil unit is equipped for cooling operation.
General Information
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
(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.)
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.
4
5
6
2-Way Valve 1
XT2
L1(OFF)
L2(ON)
N
WARNING
•
Normal Open type should be connected to wire (ON) and wire (N) for valve closing in cooling mode.
•
Normal Closed type should be connected to wire (OFF) 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
