Lennox FCA 60 Installation, Operation And Maintenance Manual page 129

Table 16
TASK
Clean or replace filters: Disposable, or metal
frame.
Visual check of the oil level
Position check of the compressor crankcase
heater.
Belt tension check.
Centrifugal fan bearings check
Check absorbed Amps
Check Smoke detector
Check Climatic control, set-points and varia-
bles
Check clock settings
Check the position and tightness of
refrigeration components
Check Airflow rate safety switch (if fitted).
Check freeze protection on HWC
Check three way valve on HWC
Check economiser actuator operation
Check refrigeration 4way valve
Check tightness of all electrical connections
OPERATING MODE
Replace filters with new ones if disposable. Vacuum clean or blow
the dirt. Wash and dry carefully. +Replace media if necessary
Blocked filter will reduced the performance of the unit.
THE UNIT MUST NOT OPERATE WITHOUT FILTERS
Visually check the oil level through the sight glass on the side of
the compressor casing
Check the heating resistance is fitted properly and tight around the
compressor body.
Check belt tension (Info in IOM) Replace belt if necessary.
Isolate unit from the main power supply; Push the fan wheel
manually and check for abnormal noises. Bearings are lubricated
for life but may need replacement after 10000 hours
Check absorbed Amps on all three phases; compare with the
nominal value given in the electrical wiring diagram.
Start the unit. Trigger the smoke detector by moving a magnet
around the detector head. Reset unit and control.
Refer to the commissioning sheet; Check all set points are set
according to this document.
Check the time and date of the control
Check systematically all connections and fixings on the
refrigeration circuit. Check for oil traces, eventually a leak test
should be conducted. Check operating pressures correspond to
the ones indicated on the commissioning sheet
Shut down supply fan. The fault must be detected within 5
seconds.
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 all fixings and transmission. Stop the unit using the control.
The fresh air damper must closes. Start the unit the fresh air
damper should open
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.
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
6 YEARLY
MONTHLY QUARTERLY MONTHLY
WINTER
0
0
0
0
0
∆
∆
∆
0
∆
0
∆
∆
∆
∆
∆
ESTIMATED
B4 TIME
(mn)
20
2
2
10
10
15
5
15
5
30
5
5
5
5
30