74 201908
CHV Mini Series Service Manual
CHV Mini VRF 50/60Hz
After dropping up to -0.1MPa, the vacuum pump keeps on
running for 20-60minutes.
Connect the vacuum pump
Run the vacuum pump (above 2 hours)
Stop the vacuum pump
Remain vacuum (above 1h)
1. Close the valve of the pressure
gauge;
2. Disconnect the pressure gauge and
the vacuum pump;
3. Close the vacuum pump.
3.11 Additional refrigerant charge
The additional refrigerant (R410A) charge is calculated according to the diameter and length of the pipe at the liquid side
of the indoor and outdoor units.
Diameters of pipe atthe
liquid side (mm)
Additional refrigerant charge equal to the length of 1m pipe
(unit: kg)
φ6.35 0.023
φ9.52 0.040
Note: The R410A refrigerant must be weighed by an electronic scale and filled in the liquid state.
3.12 Leakage detection
Use soap water or leakage detector to check every joint whether leaks or not.
Check point of outdoor unit
Check point of indoor unit
D
A
B
C
3.13 Heat Insulation
Do the heat insulation to the pipes of gas side and liquid side separately. The temperature of the pipes of gas side and
liquid side when cooling, for avoiding condensation please do the heat insulation fully.
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