Gree GWC09AA, Installation And Service Manual

Page: 68 / 136

GREE Service Manual GWC09AA / K5NNA6A Page 68
Commissioning
Checks before commissioning
Before the AC split system commissioning any installation work on the indoor
and on the outdoor unit must be finished completely.
For the first time activation make sure that the following working steps listed be-
low are complete:
1. The outdoor unit is mounted securely and tightly screwed in order to pre-
vent vibrations during operation. The fixing ground is stable enough in or-
der to carry the weight of the unit.
2. The wall penetrations are filled and tightened with moisture-resistant insu-
lation and sealed professionally.
3. The earthing wire has been checked.
4. The water drain hose (condensate) is mounted correctly.
5. The surrounding area nearby the indoor and the outdoor unit is free such
that neither the air intake nor the air outlet is obstructed.
Refrigerant circuit
The outdoor unit is prefilled with the refrigerant HC R-290. The filling quantity
conforms to the necessary filling of the indoor and outdoor unit, as well as for
the functional pipe set and is strictly limited to the labelled amount.
First operation of the system
The first operation of the system is done under supervision of a trained and
competent person. This is to ensure that all installation activities are made prop-
erly, that the system is wired correctly and that the unit operates with the in-
tended performance.
1. Ensure that any tools and installation debris are removed from the units.
2. Switch on circuit breakers after the installation is completely finished.
3. Check the correct connection and the electrical wiring once again.
4. Make sure that all valves are opened.
5. Switch on the system for first operation. Press the “ON/OFF“ button of the
remote control in order to start the unit.
6. By pressing the “MODE“- button switch the system through the different
modes of operation: COOL, DRY, FAN in order to find out about the cor-
rect operation of the unit in all modes.
7. Check the system operation for at least 15 min.
8. Afterwards, check the indoor and the outdoor unit for the following aspects
mentioned below:
Indoor unit
1. Activate all buttons of the remote controller and confirm that they evoke
the requested effects (compare pages 27 to 30)
2. Confirm that all lights and displays operate.
3. Confirm that the actuating drive of the air-flow louver operates properly.
4. Confirm that condensate drains without any obstruction.
5. Measure the entering-air and the leaving air temperature of the indoor-unit
with start-up and at the end of the 15 minutes test.
6. Finally the measured temperature difference across the indoor unit
air inlet and air outlet should be at about 8 K.