Lennox eCOMFORT R32 GAC 035S, Installation, Operating And Maintenance Manual

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Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022
N°
MAINTENANCE PLAN
Monthly + Quarterly Half Yearly
Task Operating mode
Inspection of the microchannel
coils aluminum-copper connexions
for corrosion.
Proper care to be given when cleaning 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 cleaning 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 compressor’s elec-
trical current.
Check the electrical current of each compressor on the 3 phases of par-
tial load and at 100% - with a certain frequency, according to the utiliza-
tion of the machine. Example:
Monthly: If the unit is used all over the year.
Half Year:
If seasonal use.
Electrical cabinets air-filters
cleanning.
It’s mandatory to clean the filters at least once a month according to
environment where the unit is located to avoid overheating the electrical
components.
Check the filter fouling rate, clean or replace it when needed by an ori-
ginal filter.
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/or after each intervention
on the refrigerant circuit.
Check the 4-way valve.
During cooling mode, reverse to Heat Pump mode.
Reset the control.
Check the position of the crank-
case heaters ( around the
compressor) and it’s proper
functioning.
Ensure crankcase heaters is well fitted and secured.Verify the operation
of the crankcase heaters.
Verification 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.
If possible, check for water pres-
sure in the circuit.
Check the water pressure in the circuit and the efficiency of the expan-
sion vessels.
Check overall working of the flow
controller.
Cut-off the compressors, stop the water circulation. Then start the unit
and wait for the water flow fault signal in the controller.
Check the circulation pumps.
Check the absorbed electrical power and the correct rotation of the
pumps.
Check if there is no leakage of water at pump seal and if needed follow
the manufacturer maintenance plan.
4.2.- MAINTENANCE PLAN
4.- MAINTENANCE