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
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 flows of the different fluids (water, air) both
in input and in output from the unit
temperatures and pressures in the feature points of the
cooling circuit (compressor, liquid, suction drain/unload)
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” paragraph)
