Part 3 Test Run
3. Test RunDetail
1.Check that all tubing and wiring have been properly con- nected.
2.Check that the gas and liquid side service valves are fully open.
Settlement of outdoor unit
•Anchor the outdoor unit with a bolt and nut(ø10mm) tightly and horizontally on a concrete or rigid mount.
•When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake.
•In the case when the vibration of the unit is conveyed to the hose, secure the unit with an
Bolt
Tubing connection
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 air.
3.Ensure the difference between the intake temperature and the discharge is more than 8°C(46°F) (Cooling) or (Heating).
Intake temperature
Discharge air
Discharge temperature
4.For reference; the gas side pressure of optimum condition is as below.(Cooling)
NOTE: If the actual pressure is higher than shown, the system is most likely
If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added.
The air conditioner is now ready for use.
PUMP DOWN
This is performed when the unit is to be relocated or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the unit in cooling mode.
Pump Down Procedure
1.Connect a
2.Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas.
3.Close the liquid side service valve(all the way in).
4.Turn on the unit's operating switch and start the cooling operation.
5.When the
5.Check operating current.
6.Change operation mode and check.
Refrigerant | Outside ambient | The pressure of the gas side |
| TEMP. | service valve. |
R22 | 35°C (95°F) | 4~5kg/cm2G(56.8~71.0 P.S.I.G.) |
R410A | 35°C (95°F) | 8.5~9.5kg/cm2G(120~135 P.S.I.G.) |
Service Manual 33