FläktGroup Multi-DENCO, Operation Manual

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Servicing and Maintenance Multi -DENCO
98 FläktGroup DC-2013-0101-GB • Subject to modifications • R4-05/2018
10.1 Maintenance access
All panels can be removed to perform maintenance.
However, all main components are accessible from the front.
10.2 Servicing
Routine, planned maintenance visits will be required throughout the year to
maintain efficiency and may also be a
legal requirement depending on Country spe-
cific legislation.
The intervals of service will depend entirely on the operating conditions of your room.
This can be as often as once per month for critical, production essential equipment.
Your FläktGroup representative will be able to assist you with arranging a maintenance
contract that will suit your needs.
Fig. 10-1
10.2.1 Example Maintenance schedule
Below show an example maintenance schedule for a Multi -DENCO unit. We advised
the below is the minimum requirements. Most situations will require further actions and
a shorter time interval to ensure good operating conditions.
After every inspection, any relevant information must be recorded into the logbook.
Certain countries have specific legislation regarding record keeping (e.g. Fluorinated
Greenhouse Gases Regulation (EU) No 517/2014). Please refer to chapter 10.7 'Log-
book & EU Regulation' for more details.
During maintenance and servicing:
•
Do not allow the system pressures to rise above the Maximum Operating
Pressure (MOP) stated on the unit's nameplate.
•
If the High Pressure (HP) switch fails to deactivate the compressors and the
pressure continues to rise; DEACTIVATE THE UNIT IMMEDIATELY (for
example, isolate the power supply).
Before re-enabling the unit:
•
Mechanically measure the pressure within the system
•
Wait until the pressures have reduced to normal standby conditions
•
Ensure the condenser fan MCB(s) have been re-enabled.
NOTE!
Items of equipment attached to the refrigerant circuit, for instance the H.P.
switch (Fig. 10-1), are often protected by a schrader core. If this is the case the
connecting nut is painted red. If the connecting nut has no red paint then you
must assume that no Schraeder core is present and therefore the whole
system refrigerant charge will have to be recovered before the component
can be removed