Air-to-water Heat Pump
23
15 Other Auxiliary Heat Sources
Other auxiliary heat sources are 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
auxiliary heat source.
ON
OFF
N
16 Gate-controller
If there is gate control function, pull out the leading wire 50 on terminal board(XT2) between19 and
20 or between 21 and 22, and then connect the Gate-controller .
Installation Guide follow as:
19
20
Gate-controller
GREE does not supply
this section
19
20
50
XT
XT
17 Filling of Refrigerant
(1) Before shipped out from manufacturer, the outdoor unit has been filled with refrigerant.
Additional refrigerant may be filled when carrying out site connection of pipelines.
(2) Check the liquid valve and the gas valve of the outdoor unit. The valves shall be completely
shut off.
(3) Connect a vacuum pump to the liquid valve and the gas valve of the outdoor unit to remove
air from the inside of the indoor unit and the connecting pipe. Refer to the following figure:
Pressure meter
“HI”knob
Vacuum pump
“Lo”knob
Liquid valve
Gas valve
Connection pipe
(4) After confirming that there is no leakage from the system, when the compressor is not in
operation ,charge additional R410A working fluid with specified amount to the unit through
the filling opening of the liquid pipe valve of the outdoor unit.
◆
Be sure to charge the specified amount of refrigerant in liquid state to the liquid pipe.
