Commissioning And Operation; Preliminary Checks Before Startup; Preliminary Checks At Startup - Lennox AQUALEAN AWC Application Manual

COMMISSIONING AND OPERATION

4.1.- PRELIMINARY CHECKS BEFORE STARTUP

- Check that the power supply is the same as stated on the Rating Plate which is in agreement with the electrical diagram for the
unit and that cable sizes are correct.
- Check that tightness of the electrical connections to their terminals and to ground.
- Check with your hand that the fans are turning freely.
- Check the control panel connections.
(If the connection is incorrect, the unit will not operate and the control panel display will not light).

4.2.- PRELIMINARY CHECKS AT STARTUP

To start the unit, follow the instructions given in the User Manual for the control supplied with the unit
(requiring operation in any of the modes, cooling, heating, or automatic).
After a time delay, the unit will start.
With the unit operating, check that the fans are turning freely and in the correct direction.
CHECK THAT THE COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION. (UNITS 012 to 020).
- If you have the option phase rotation indicator, use it to check the correct rotation.
- If you do not have three phase return lock, check the correct direction of rotation. The suction pressure decreases and the discharge
pressure increases when the compressor is started.
- If the connection is incorrect, rotation will be reversed, causing a high noise level and a reduction in the amount of current consumed.
If this occurs, the compressor's internal protection system will operate to shut down the unit. The solution is to disconnect, reverse
two of the phases and connect again.
WITH OPERATING UNIT, CHECK:
- Low pressure and high pressure.
- Use the evaporating and liquid temperature to calculate superheat and subcooling.
- Adjust the refrigerant charge and/or expansion valve according to the preceding values.
COMPRESSORS WITH OIL LEVEL.
The oil level must always be checked. When the compressor is at rest, the level should be between 1/4 and 3/4
in the sight glass, while when running the level should be between 3/4 and full.
In the event of having to add oil, remember the type of oil is synthetic POE.
The original oil charge in the compressor is ICI Emkarate RL32-3MAF. This type of oil must also be used when replacing the oil completely.
When only topping up, RL32-3MAF or Mobil EAC Artic 22C can be used.
AQUALEAN - AWC/AWH - MIL118E-1407 / 10-2013
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