Acson international AWH028C, Technical Manual

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66
Start-up
1. Open all valves to full open position and turn on power to the conditioners.
2. Set thermostat for "Fan Only" operation, check for proper air delivery and fan speed. Each unit has 3 speed.
3. Set thermostat to "Cool". Many conditioners have time delays which protect the compressor against short cycling.
After a few minutes of operation, check the discharge grilles for cool air delivery.
4. Measure the temperature difference between entering and leaving water. It should be approximately 5
℃
to 6
℃
.
5. If the temperature different is out of range, adjust the combination shutoff/balancing valve in the return line to a
water flow rate which will result 5
℃
to 6
℃
difference.
6. Set thermostat to "Heat "(used in the heat pump model). Set system switch to the "Auto " position and depress the
heat setting to the warmest selection. Some conditioners have built-in time delays which prevent the compressor
from immediately starting. the fan will start once coil temperature reach 40
℃
.
7. Measure the temperature difference between entering and leaving water. It should be approximately 4
℃
to 5
℃
(based on cooling mode water flow rate).
8. Check the elevation and cleanliness of the condensate line. If the air is too dry for sufficient dehumidification,
slowly pour enough water into the condensate pan to ensure proper drainage.
9. If the conditioner does not operate, please refer to the troubleshooting guideline for necessary corrective action.
10. Check the unit for vibrating refrigerant piping, fan wheels, etc.
11. Do not lubricate the fan motor as it is prelubricated at the factory.