Installation Procedure
Refrigerant piping
6. Piping method: to use wacuum pump( e.g. AU182AFERA)
1 .Detach the service portis cap of
2 .Open the handle at low in gaugemanifold, operate vacuum pump. If the
3 .Vacuumize for over 15min. And check the level gauge which should read
4 .Open the valve rod for the
5 .No gas leakage? | In case of gas leakage, tighten |
| parts of pipe connection. If |
| leakage stops, then proceed 6 |
| steps. |
6 .Detach the charge hose from the service port, open 2- way valve and
7 .To prevent the gas leakage, turn the service ports cap,
Liquid stop valve
| Gas stop valve |
2 way valve |
|
3 way valve | Gauge maifold(R410A) |
| |
| Vacuum pump(R410A) |
Open
Close
2 way valve
3 way valve 900
Service port
900 for 6 sec.
If it does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again and vacuumize, fill up prescribed refrigerant from the gas cylinder.
2 way valve |
| 2 way valve |
|
| |
| 6 | 3 way valve |
3 way valve |
| |
6 | Valve rod cap | |
| Valve rod cap | |
|
| |
|
| Service port cap |
the valve rodis cap for
CAUTION:If the refrigerant of the air conditioner leaks, it is necessary to make all the refrigerant out. Vacuumize first, then charge the liquid refrigerant into air conditioner according to the amount marked on the name plate.
7. Charging amount of refrigerant
When the total length (L) of the two indoor units' connecting pipe is less than 5m, it is unnecessary to charge additional refrigerant.
If the connecting pipe (L) exceeds 5m, it shall charge Mg additional refrigerant per meter. That is: Refrigerant charging amount =
For AU122AEERA, AU182AFERA, M=30
For AU242AGERA, AU282AHERA,AU362AHERA, AU36NAHERA,AU422AIERA, AU42NAIERA.AU522AIERA,AU52NAIERA,M=50
Only in COOLING operation can charge the additional refrigerant.
When charging, the refrigerant shall be charged from the charging nozzle of low pressure vavle. Be carefull when charging refrigerant, do not let the air mix into the system,and must charge the additional refrigerant in liquid condition.
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