Way Valve; Other Auxiliary Heat Sources - Gree Versati III GRS-CQ4.0PdG/NhH2-E Owner's Manual

Air-to-water Heat Pump All in One Versati
Step 2. Find the terminal block and connect wires as below.
• 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

12. 3-Way Valve

As the 3-way valve has been installed in the main unit and wired before delivery, no external wiring is required,
so does the water tank.

13. Other Auxiliary Heat Sources

Other thermal is allowed for the equipment and controlled in such a way that the mainboard will output 230V
when outdoor temperature is lower than the set point for startup of the aother thermaluxiliary heat source.
Note:Other thermal and Optional Electric Heater CANNOT be installed at the same time.
Step 1. Other thermal installation
Other thermal should be installed with monobloc unit parallel.Moreover,an accessory called optional water
temperature sensor(5 meter length) shall be installed at the same time.
All in one Unit
T-gas
S4 S1
pipe
T-liquid
pipe
S3 S2
Note: Logic 2 of other thermal is NOT availbale for this situation.It is recommended not to use other thremal for
hot water production.
XT2
XT2
20 17
20 17 16
2-way 2-way
valve 1 valve 1
WARNING
G
28
XT2
16
20 17 16
2-way
valve 1
Other thermal
Heating
T-op onal sensor
Water in
Water
Filter
SPLIT TYPE
2-way
Water
valve Floor
pump
temp.
Mixing
valve