Commissioning And Operation Page; Steps To Follow For Commissioning The Units - Lennox ECOLEAN EAC 0091 S Installation, Operating And Maintenance

3.- COMMISSIONING AND OPERATION

3.1.- STEPS TO FOLLOW FOR COMMISSIONING THE UNITS

PRE-START
Before commissioning the unit check the following:
1.- Check that the voltage is the same as the rated voltage on the specification plate.
2.- Check that the supply to the control system is connected in accordance with the electrical diagram
(if incorporates).
3.- Check that the main switch is ON (if incorporates).
4.- Make sure that the water connections are correct and have not been altered, as this can result in incorrect
operation the flow divider will not operate if the connections are mixed.
5.- Check that the fan can rotate freely.
6.- Check the water pump's direction of rotation.
7.- Check for air in the water system. Purge if necessary.
8.- The compressor must not be started until the crankcase heater has been running for at least 8 hours.
- The compressor has a single phase 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 so that
this heater will be activated.
- Check that the compressor starts after two minutes.
- Select cool or heat as the operating mode at the control unit.
- When the compressor starts the fans rotate at maximum speed for a short time. They then rotate in accordance
with the condensation temperature/pressure.
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. Single phase
models are always started up in the proper direction; however, the three phase models, turn in either direction
depending on the order of the power supply phases. 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).
- Connect high and low pressure gauges and check that operating pressure values are normal.
- Measure electrical consumption for the unit and check that it is near what is indicated on the specification plate.
- Check the electrical consumption of the compressor and the fans with what is specified in the physical data sheets.
- In the case of a Heat Pump unit, make a cycle change on the Control Panel checking that the 4-way valve makes
the change correctly. Check the pressure values in the new cycle.
- Remember the low pressure switch is reset automatically and the high pressure switch is reset manually.
- Remember that low pressure switch is automatic reset, if it has 3 operations in one hour, it will be a
manual reset, through the control of the unit.
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