CLIVET WSAN-XES 18.2, Instructions For Installation, Use And Maintenance Manual, Page: 29 / 52

29 WSAN-XES 18.2-35.2 M0SM40N17-04
In this case, disconnect the power supply and invert 2
phases on the machine power supply.
Do not let the compressor work for a long time with
opposite rotation: more than 2-3 of these abnormal start
-ups can damage it.
To ensure the rotation direction is correct, measure the
condensation and suction pressure.
The pressures must significantly differ: upon start-up,
the suction pressure decreases while the condensation
one increases.
Reduced load operation
The units are equipped with partialisation steps and so
can operate with reduced loads.
However, a constant and long operation with reduced
load with frequent compressor(s) stops and start-ups
can cause irreparable damages for the absence of oil
return.
The above-described operating conditions must be
considered outside the operating limits.
If the compressor breaks down due to operating in the
above-mentioned conditions, the warranty shall no
longer be valid and CLIVET spa
shall not accept any liability.
Periodically check the average operating times and
frequency of compressor start-ups: indicatively the
minimum thermal load must be such as to require a
compressor to operate for at least ten minutes.
If the average times are close to this limit, take the
proper corrective actions.
START-UP REPORT
dentifying the operating objective 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 flows of the different fluids (water,
air) both in input and in output from the unit

Temperature and pressures on the characteristic
points of the refrigerating circuit (compressor
discharge, liquid, intake)
The measurements must be kept and made available
during maintenance interventions.
2014/68/UE PED DIRECTIVE
2014/68/UE PED DIRECTIVE gives instructions for
installers, users and maintenance technicians as well.
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)
Certification of setting in service:

for all the units
Periodical verifications:

to be executed with the frequency indicated by the
Manufacturer (see the “maintenance inspections”
paragraph)