Lennox BAC 045 DNM 3M User Manual

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BALTIC-IOM-0412-E / Service manual
MAINTENANCE PLAN
Task Operating mode Monthly Quarterly 6 monthly
Yearly
before
winter
Estimated
time
(min)
Check electric heater
element for excessive
corrosion
Isolate the unit; Pull the electric heater
out of the heater module box and check
the resistances of traces of corrosion;
Replace resistance as required;
1h if
replacement
Check anti-vibration
mountings, for wear
and tear.
Visually check anti-vibration mountings on
compressors and centrifugal fan. Replace
if damaged.
1h if
replacement
Check refrigeration
circuit for traces of
acid in the oil
Take a sample of oil from the refrigeration
circuit.
Check Glycol
concentration in the
HWC circuit
Check the glycol concentration in
the pressurised water circuit. ( a
concentration of 30% gives a protection
down to aprox. -15°C) check the circuit
pressure
Check 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.
Gas burner module
check for corrosion
Pull out the burner to access the tubes
(refer to Gas burner section in the IOM)
Sweeping and
cleaning the gas
burner
Clean the in-shot burners and the blower
wheel lightly with a brush. Sweep the fl ue
and fl ue box. Wipe-off the dust from the
housing of the motor. Clean combustion
air inlet louvers Pull-out baffl es from the
tubes, sweep the tubes
CHECK FLUE BOX GASKET
Gas supply pressures
/ connections checks
Refer to Gas burner section in the IOM for
details
Gas regulation valve
settings
Refer to Gas burner section in the IOM for
details
Check gas burner
safety switches
Refer to Gas burner section in the IOM for
details
Check gas fume
combustion levels
Refer to local regulation

Lennox BAC 045 DNM 3M Specifications

General

Brand	Lennox
Model	BAC 045 DNM 3M
Category	Air Conditioner
Language	English