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3.- COMMISSIONING AND OPERATION
3.2.- PRELIMINARY CHECKS AT FIRST INSTALLATION
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.
- 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.
ASTP Protection is included with the unit compressors. See "Fault diagnosis" for more information.
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.
COMPRESSOR 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.
AIR INTAKE DUCT
OUTDOOR
SECTION
INLET AIR DUCT
OUTDOOR
SECTION
FLEXIBLE JOINT AT
OPENINGS
OUTDOOR
SECTION
TRAP
DRAIN PIPE
ACCESO A VENTILADOR EXTERIOR
DISCHARGE IN THE OUTDOOR SECTION OF UNITS 055D/070D/085D.
Always to be done through a common duct or plenum.
Summary of Contents for CMC 020S
Page 23: ...22 2 INSTALLATION 2 7 ELECTRICAL CONNECTIONS COMFORT AND SERVICE TERMINAL...
Page 34: ...33 NOTES...
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