Compressor oil sump heater
Connect the compressor oil heating resistances at least 8
hours before the compressor is to be started:
•
at the first unit start-up
•
after each prolonged period of inactivity
1. Power the heaters: isolator switch on 1 / ON.
2. Check the heating elements are drawing electricity, to
ensure proper function.
3. Start-up the compressor only if the crank-case tem
-
perature on the lower side is be higher than the out
-
side temperature by at least 10 °C .
4. Do not start the compressor until the oil in the crank
-
case is at the correct temperature.
Voltage
Check that the air and water temperatures are within in
the operating limits.
Start-up the unit.
While the unit is operative, i.e. in stable conditions near
-
ing operating ones, check:
•
Power supply voltage
•
Total absorption of the unit
•
Absorption of the single electric loads
Remote controls
Check that the remote controls (ON-OFF etc) are con
-
nected and, if necessary, enabled with the respective
parameters as indicated in the “electrical connections”
section.
Check that optional sensors or components are enabled
with the appropriate parameters as specified in the “Elec
-
trical connection” section and following pages.
Scroll compressors (only Belaria
®
fit (85))
The scroll compressors have only one sense of rotation.
Reversing the sense of rotation will not damage the com
-
pressor, but it will increase the noise and affect the ca
-
pacity.
After a few minutes, the compressor shuts down due to
the thermal protection trip.
In this case, disconnect the power supply and invert 2
phases on the machine power supply.
NOTE
-
Avoid prolonged running times of the compressor in the
reverse sense of rotation. Several starts with the wrong
sense of rotation can damage the compressor.
To ensure the rotation direction is correct, measure the
condensation and suction pressure.
The pressures must differ significantly: upon start-up, the
suction pressure decreases while the condensation one
increases.
Start-up report
To detect the objective operational conditions is useful to
control the unit over time.
With unit at steady state, i.e. in stable and close-to-work
conditions, identify the following data:
•
total voltages and absorptions with unit at full load
•
absorptions of the different electric loads (compressors,
fans, pumps etc)
•
Temperatures and flow rates of the various liquids (wa
-
ter, air) both at the inlet and outlet of the unit
•
Temperatures and pressures at characteristic points of
the refrigeration circuit (discharge side of the compres
-
sor, liquid, suction side)
The detections must be kept and made available during
maintenance interventions.
Directive 2014/68EU PED
Directive 2014/68EU PED also sets out the regulations
for unit installers, users and maintenance operators.
Refer to local regulations; briefly and as an example, see
the following:
Compulsory verification of the first installation:
•
only for units assembled on the installer’s building site
(for ex. condensing c direct expansion unit)
Commissioning declaration:
•
for all units
Periodical checks:
•
to be executed with the frequency indicated by the
Manufacturer (see the “maintenance inspections” par
-
agraph)
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CoMMISSIonInG
