2. Guideline for each installation process
35 _ Heat pump 50Hz/R410A
Part 3 Design and installation
2.9 Trial test run operation
2.9.1 Test run procedure
Check the following before turning power on
Wrong power wiring , loosed screws
Wrong control transmission wiring , loose screws
Piping size , presence of thermal insulation
Measurement of main power circuit insulation
Addition or refrigerant if required
Fully open respective stop valves on liquid, gas
Use a mega-tester
Be sure to record the additional
quantity of refrigerant
Turn on outdoor unit power
2.9.2 Evaluation performance
Evaluation of the performance
Operate unit for 15~20 minutes, then check the system refrigerant charge:
①
Measure the pressure of the gas side service valve.
②
Measure the temperature of the intake and discharge of air.
③
Ensure the difference between the intake temperature and the discharge is more than 8°C
④
For reference, the gas side pressure of optimum condition is as below. (Cooling)
: If the actual pressure is higher than shown, the system is most likely overcharged so extra refrigerant should be
removed.
If the actual pressure is lower than shown, the system is most likely undercharged so extra refrigerant should be added.
The air conditioner is now ready for use.
NOTE
R410A 35°C (95°F) 8.0~10.0kg/cm
2
G
Outside ambient
Temp.
Refrigerant
The pressure of the gas side
service valve.
Discharge
temperature
Discharge air
Intake temperature
Discharge
temperature
Discharge air
Intake temperature
Discharge
temperature
Discharge air
Intake temperature
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