EN-75
EREBA He
5 - MAINTENANCE
5.1 - Standard maintenance
To ensure optimal efficiency and reliability
of the units, we recommend establishing a
maintenance contract with your local Service
organisation. This contract will include regular
inspections by Service specialists so that any
malfunction is detected and corrected quickly,
ensuring that no serious damage can occur.
A Service maintenance contract is the best
way to ensure the maximum operating life for
your equipment and, through the expertise
of technicians, provides the ideal way to
manage your system cost effectively. Air
conditioning equipment must be maintained
by professional technicians, whilst routine
checks can be carried out locally by
specialised technicians. See the standard
ISO 5149.
All refrigerant charging, removal and
draining operations must be carried out by
a qualified technician and with the correct
material for the unit. Any inappropriate
handling can lead to uncontrolled fluid or
pressure leaks.
Before doing any work on the
machine ensure that the power is
switched off. If a refrigerant circuit
is opened, it must be evacuated,
recharged and tested for leaks.
Before any operation on a refrigerant
circuit, it is necessary to remove the
complete refrigerant charge from
the unit with a refrigerant charge
recovery group.
Simple preventive maintenance will allow
you to get the best performance from your
HVAC unit:
●
improved cooling and heating performance
●
reduced power consumption
●
prevention of accidental component
failure
●
prevention of major time-consuming and
costly interventions
●
protection of the environment
There are five maintenance levels for HVAC
units, as defined by the AFNOR X60-010
standard.
NOTE:
Any deviation or non-observation of
these maintenance criteria will render the
guarantee conditions for the HVAC unit
nul and void, and the manufacturer, will no
longer be responsible.
5.1.1 - Level 1 maintenance
See note in §5.1.3 Level 3.
Simple procedures can be carried out by the
user on a weekly basis:
●
Visual inspection for oil traces (sign of a
refrigerant leak),
●
Air heat exchanger cleaning - see §5.3Air
heat exchanger,
●
Check for removed protection devices,
and badly closed panels,
●
Check the unit alarm report when the unit
does not work (refer to WUI end user
manual),
●
General visual inspection for any signs of
deterioration,
●
Verify the charge in the sight-glass.
Check that the water temperature difference
between the heat exchanger inlet and outlet
is correct.
5.1.2 - Level 2 maintenance
This level requires specific know-how in the
electrical, hydraulic and mechanical fields.
The frequency of this maintenance level can
be monthly or annually depending on the
verification type.
In these conditions, the following maintenance
operations are recommended.
Carry out all level 1 operations, then:
Electrical checks
●
At least once a year tighten the power
circuit electrical connections (refer to § 5.2
for the main electrical connections).
●
Check and retighten all control/command
connections, if required (refer to § 5.2 for
the main electrical connections).
●
Remove the dust and clean the interior of
the control boxes, if required.
●
Check the status of the contactors,
disconnect switches and capacitors.
●
Check the presence and the condition of
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