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Installation manual /
eCOMFORT-MIL150E-0916 / 05/2017
3.- COMMISSIONING AND OPERATION
REMEMBER THAT THE COMPRESSOR IS A SCROLL TYPE COMPRESSOR:
Before starting the unit, the compressor should be checked that rotates in the correct direction, through a three phase
protection. Scroll type compressors only compress in one direction of the rotation. Therefore, it is essential that the
phase connection for scroll-type three-phase compressors be carried out correctly (the correct direction of rotation can
be checked when the pressure on the suction side decreases and the pressure on the discharge side increases when
the compressor is activated). If the connection is wrong, the 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 in
shutting down the unit. The solution is to disconnect, switch the wires between two of the phases and connect the three
again).
- Occasionally, when compressor stops and starts, there is a metallic noise because of spirals of the compressor. This is normal.
- Check compressor oil level, sight glass included (on the sides of the compressor, the level should be between 1/4 and 3/4 in the
sight glass, while during operation the level should be between 3/4 and full).
- Check that operating pressure values are normal.
- Measure electrical consumption for the unit.
- Check the electrical consumption of the compressor and the fans with what is speci
fi
ed in the physical data sheets.
- In the case of a Heat Pump unit, make a cycle change checking that the 4-way valve makes the change correctly. Check the
pressure values in the new cycle.
LENNOX REFAC, S.A. Designs and develops its machines always looking for the greater comfort and well-being of its custo-
mers 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.
3.1.- STEPS TO FOLLOW FOR COMMISSIONING THE UNITS
Before commissioning the unit check the following:
1. Check that the voltage is the same as the rated voltage on the speci
fi
cation plate.
2. Check that the supply to the control system is connected in accordance with the electrical diagram (if incorporates)
3. Make sure that the water connections are correct and have not been altered, as this can result in incorrect operation the
fl
ow divider will not operate if the connections are mixe.
4. Check that the main switch is ON.
5. The compressor must not be started until the crankcase heater has been running for at least 8 hours.
6. Check the water pump’s direction of rotation.
7. Check for air in the water system. Purge if necessary.
8. Check that the fan can rotate freely.
- The compressor has an electric heating element to assure a separation between the Refrigerant and the oil in the housing.
This heater is activated when the compressor is off and stops working when the compressor is on.
About eight hours before start up or after a long shutdown period, voltage should be supplied to the unit and main switch
activated in order to this heater will be activated.
- Check that the compressor starts after several minutes since water pump is working.
- Adjust the control to select the operating mode.
- Water connections: before running the unit for the
fi
rst time, check that the water circuits are connected to the heat exchangers
(for example, no inversion between evaporator and condenser or between the water inlets and outlets. Waer pump will be
preferably upstream, so the evaporator/condenser will be under possitive pressure. Water inlet and outlet connections are
indicated in the certi
fi
ed scheme sent with the unit or depicted in the manual. A
fi
lter must be installed in the water circuit
upstream the heat exchanger. This
fi
lters must stop all the particles higher than 1 mm in diameter and must be placed at 1 m
maximum from the exchanger inlet.
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