Air-to-water Heat Pump
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(5) Filling the refrigerant
Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant
won’t contaminate with each other.
The refrigerant tank should be kept upright at the time of filling refrigerant.
Stick the label on the system after filling is finished (or haven’t finished).
Don’t overfilling.
After filling is finished, please do the leakage detection before test running; another time of leak
detection should be done when it’s removed.
(6) Safety instructions for transportation and storage
Please use the flammable gas detector to check before unload and open the container.
No fire source and smoking. According to the local rules and law
8 Optional Electric Heater
Optional electric heater is allowed for the equipment and controlled in such a way when outdoor
temperature is lower than the set point for startup of the optional electric heater.
Step 1. Optional electric heater installation
Optional electric heater should be installed with monobloc unit in series. The optional electric heater
could be 1group or 2 group, and only works of space heating.
Step 2. Electric wiring work
AC contactor should be installed to XT2 KM1(1 group electric heater) or KM1 and KM2(2 group
electric heater).
Step 3. Wired controller setting
Optional electric heater should be selected "1/2" group if necessary from COMMISION →
FUNCTION, then set switch on (outdoor)temperature and control logic(1/2).
9 Charging and Discharging of Refrigerant
The unit has been charged with refrigerant before delivery. Overcharging or undercharging will
cause the compressor to run improperly or be damaged. When refrigerant is required to be charged or
discharged for installation, maintenance and other reasons, please follow steps below and nominal
charged volume on the nameplate. Discharging: remove metal sheets of the outer casing, connect a
hose to the charging valve and then discharge refrigerant.
