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Installation Manual •
COMPACTAIR ADV IOM-MIL157E-0418
3.- COMMISSIONING AND OPERATION
3.2.- PRELIMINARY CHECKS DURING START UP.
LENNOX REFAC, S.A. Designs and develops its machines always looking for the greater comfort and well-being of its customers
and users, at the same time as the greater energy ef
fi
ciency of the elements that constitute the units. This effort would be fruitless
if it was not united to a responsible use of these equipment. For this reason, we invite you to use these machines in a responsible
way with the environment, combining the adequate comfort, with a responsible consumption of the energy resources. 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
fi
x speed 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.
