Lennox GAH 020S, Инструкция по установке, эксплуатации и обслуживанию

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Installation manual /
eCOMFORT-MIL150E-0916 / 05/2017
N°
MAINTENANCE PLAN
Monthly + Quarterly Half Y
early
Task Operating mode
Inspection of the microchannel
coils aluminum-copper connexions
for corrosion Inspection to be realised when cleaninng the coils. If corrosion is
detected, a preventive treatment needs to be done following our
recommendations
Cleanning the coils (In accordance
with local regulations)
It’s mandatory to clean the external coils, according to the environment
where the unit is located, the frequency of the cleanning varies from once
in a month to minimum twice in a year.
The performance and the sustainability of the machine is based on the
perfect heat exchange.
The use of a neutral pH cleaning product is mandatory
(WARNING: Fins and copper tubes are very fragile! Any damage WILL
reduce the performances of the unit).
Inspection of compressors electri-
cal intensities
Check the electrical intensity of each compressor on the 3 phases of
partial load and at 100% - with a certain frequency, according to the utili-
zation of the machine. Example :
Monthly : If the unit is used all over the year
Half Year : if seasonal use
Electrcal cabinets air- fi lters clean-
ning
Based on the environment of the installation, it’s mandatory to clean the
fi lters from once a month to twice a year. To avoid overheating the electri-
cal components.
Check the
fi lter fouling rate, clean or replace it when needed by an origi-
nal fi lter
Inspection of the condensors fans
Check the rotation of the fan ( free rotation, detection of vibrations or
bearing noises)
Check for the Amps consumed on all three phases; compare it with the
nominal value given in the electrical wiring diagram.
Check the status of the fan blades and its protections.
Visual inspection of the oil level
and check the oil for traces of
acidity in the refrigerant circuits Visually check the oil level through the sight glass on the side of the com-
pressor casing. Test the oil every 3 years and after each intervention on
the refrigerant circuit
Check the 4-way valve When in cooling mode, change it to HeatPump mode. Reset the control.
Check the position of the
crankcase heaters (around the
compressor) and it’s the proper
opearation
Check the right fi xation of the crankcase heaters , if it is tight enough
And verify the crankcase heaters overall working.
Veri fi cation of the defrost cycle
with 4-way valve inversion.
Switch the unit to heat pump mode. Change the set point to obtain the
standard defrost mode and reduce the cycle time to the min value. Check
the operation of the defrost cycle.
Check the water pressure in the
circuit if it’s possible Check the water pressure in the circuit and the ef fi ciency of the expan-
sion velssel
Check overall working of the fl ow
controller
Cut-off the compressors, stop the water circulation. Then start the unit
and wait for the water
fl ow failing signal in the controller.
Check the circulation pumps
Check the absorbed electrical intensity and the correct rotation of the
pumps.
Check the waterthigness of the pump mechanical seal and if needed
follow the manufacturer maintanance plan.
4.- MAINTENANCE
4.2.- MAINTENANCE PLAN