Lennox BAC 024 SNM 3M, Инструкция по установке, эксплуатации и обслуживанию

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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 three way
valve on HWC
Increase room set-point 10°C above the
actual room temperature. Check operation
of the piston. It must move away from the
valve head. Reset the control.
Check economiser
actuator operation
Check all fi xings and transmission. Stop
the unit using the control. The fresh air
damper must close. Start the unit the
fresh air damper should open
Check refrigeration
4way valve
With the unit running in cooling mode
increase the room set-point temperature
by 10°C. The unit should switch to heat
pump mode. Reset the control.
Check tightness of all
electrical connections
Power down the unit and check and
tighten all screws, terminal and electric
connections, taking a particular attention
to the power lines and low voltage control
wires
Check HP / LP safety
switches
Install manifold gauges on the circuit to
be checked. Shut down the axial fans and
wait for the HP switch to shut down the
compressor: 29 bar (+1 / -0) auto-reset
22 bar (+ - 0,7) Reconnect fans. Switch off
the centrifugal supply fan and wait for the
LP switch to cut out: 0.5bar (+ - 0,5) reset
1,5bar (+-0,5).
Check HP analogic
sensor calibration Install calibrated manifold gauges on the
circuit to be checked.
Check outdoor fans
and fan guards Check the fan blades conditions and all
fan guards and protections
Check position of all
sensors
Check the good positioning and operation
of all sensors of all sensors. Check
the values given in the control system.
Replace sensor if necessary
Check and clean if
necessary all fresh air
grilles
Check the fresh air grilles (if fi tted). If dirty
or damaged, remove them from unit and
clean with high pressure water cleaner.
Re
fi t on unit once clean and dry.
Clean condensate
drain, indoor and
outdoor coils
(following local
regulations)
Visually check the coils for dirt. If not too
dirty, cleaning with a light brush may be
enough (WARNING: Fins and copper
tubes are very fragile! Any damage WILL
reduce the performances of the unit).
If very dirty, deep industrial cleaning
is required using de-greasing agents.
(External contractors must be called).
1h if cleaning