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Recharge refrigerant
When the outdoor valve is shut,fill the refrigerant from the access hole at the gas and liquid sides.
If the required filling is impossible,open all the gas and liquid valves,then slightly shut the gas
valve, run the compressor and fill the refrigerant from the access hole at the gas side.Now adjust
the gas valve to control the refrigerant flow,which will be gasified during absorption by the system.
If there is insufficient refrigerant in the system caused by leaks,refill it after the remaining refrigerant
is recollected.
Open all valves
Open all the valves of the outdoor unit.
Heat isolation of the pipes
Separate isolation should be made for the liquid and gas pipes.
Materials used for the pipe isolation at the gas side must withstand above 120 C temperature.
Refilling of refrigerant
After the vacuum pumping,replace the vacuum pump with the refrigerant pump and refill refrigerant.
Calculation of refrigerant quantity
The factory filled refrigerant into the piping excludes the part of pipes according to be refilled on the site.
Refill the amount of refrigerant into the piping according to the following formula.
The factory filled refrigerant is listed in the table below:
The quantity of the refrigerant to be refilled during installation depends on the diameter and length
of the liquid piping.
The quantity of the refrigerant t be refilled on the site=Actual length of liquid tube x quantity of
refrigerant to be refilled for per meter of liquid pipe.
For AU96NATAEA:
Charging refrigerant (R22): Before charging refrigerant, the pressure in the system
must be kept at least for 15 minutes under 130Pa, and the pressure will not go up
within 30 minutes, only in this case, the refrigerant can be filled.
When the connection pipe is less than 5 meters, additional refrigerant needs not be
charged. Once the connection jpipe is more than 5 meters, please recharge the
refrigerant as the following formula:
Refrigerant quantity=(lenth of connection pipe-5m)*115g
Detailed procedures:
a.Cut off the vacuum pump pipe to prepare charging refrigerant
b.Place the R22 container on the scales, switch off the low pressre valve of the
pressure pipe to make the liquid type refrigerant enter the system from the high
pressure side.
c.If the system pressure goes up, stop charging refrigerant and when the
refrigerant quantity arrives the rated value, switch off the high pressure valve,
then place the R22 container on the scales with the jaw to up. Open the low pressure
valve to start up the unit, at this time, the refrigerant is gas state.
When the charged refrigerant arrives the rated value, after confirming the refrigerant
quantity is proper, unload the flexible joint and install the copper nut of the connector.
Commercial Air Conditioner
Model: AU96NATAEA
AD96NAHAEA,
AP96NACAEA
20