Thermostat; Way Valve - Gree Versati III GRS-CQ4.0Pd/NhG-K Owner's Manual

SPLIT TYPE

9. Thermostat

Installation of the thermostat is very similar to that of the remote air temperature sensor.
XT4
How to Wire Thermostat
(1) Uncover the front cover of indoor unit and open the control box;
(2) Identify the power specification of the thermostat, if it is 230V, find terminal block XT5 as NO.22~24 and
block XT6 as NO.33~34;Otherwise, if it is 24V, find terminal block XT5 as NO.17~21;
(3) If it is the heating/cooling thermostat, please connect wire as per the figure above.
• 220V power supply can be provided to the thermostat by the Versati III heat pump.
• 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 220V AC 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.

10. 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
Type
NO 2-wire
NC 2-wire
(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.
23 24 25 26
1 2 3 4
NOTE
Power
230V 50Hz ~AC
230V 50Hz ~AC
Ⅲ
Thermostat
Operating Mode
Closing water flow
Opening water flow
Closing water flow
Opening water flow
21
Air-to-water Heat Pump
Supported
Yes
Yes
Yes
Yes