Page 78 - IOM / ROOF-TOP FLEXY™ Series
PLANNED MAINTENANCEPLANNED MAINTENANCE
PLANNED MAINTENANCEPLANNED MAINTENANCE
PLANNED MAINTENANCE
Regular maintenance of your Rooftop will extend its
operating life and reduce operating faults. We
recommend that the unit is serviced by a trained
refrigeration engineer.
A log book kept near the equipment detailing work
carried out, by whom and when, is an excellent
diagnostic tool.
The panel opening key is required for this work (see
“TRANSPORT”).
MOTOR-FAN ASSEMBLY
After 50 operating hours check the belt tension and
the pulley screws for tightness. Repeat this check every
two months.
The fans contain bearings that are "lubricated for life",
but we recommend replacing them every 10,000
operating hours.
During this inspection, check the condition of the anti-
vibration mounts, by looking for any cracks or signs of
abnormal wear.
FILTERS
The filters fitted as standard are manufactured with a
washable and recyclable material. The CLIMATIC
indicates if they are blocked. The cleaning schedule is
directly related to the environment in which the
equipment is operated. However, monthly cleaning is
recommended. A blocked filter will reduce the
performance and reliability of the Rooftop.
After removing the filters, remove any dust and wash
them in a tepid water solution with a little liquid
detergent. After rinsing in fresh water, leave the filters
to dry. Take all necessary precautions during operation
to avoid damaging or piercing the media, as this would
require the damaged cell to be replaced.
NOTE: The equipment must never be operated with
the filters removed.
To avoid prolonged shutdown, always keep a spare
filter set.
HEAT EXCHANGERS
The performance of your equipment is directly linked
to the state of the heat exchangers, and it is therefore
important to ensure that they are cleaned regularly.
EVAPORATOR COIL (INTERNAL)
The exchange area must be kept clean at all times. It
is protected by the filters. If the filters are well
maintained, the battery will only require occasional
general cleaning.
A brief inspection should be carried out when servicing
the filters.
CONDENSOR COIL (EXTERNAL)
The condensor coil is not protected by the filters. The
cleaning schedule is directly related to the environment
in which the equipment is operated. A brief inspection
should be carried out when servicing the machine.
Cleaning can be performed using compressed air or a
soft brush. Maximum caution is needed as the
aluminium fins are relatively fragile.
However, this type of cleaning is sometimes difficult
and relatively ineffective because the clogging is caused
by a mixture of grease vapour and powder. For this
reason we would recommend cleaning with
PRESTOSOL, a de-greasing agent with very low
toxicity, non-flammable and which does not corrode
standard metals.
As a rule, it is sufficient to apply the product to the fins,
moving up and down and from left to right (as if you
were painting it). If the coil is very blocked, it may be
necessary to wait a few minutes after first applying the
product and then continue.
This cleaning must be performed when the machine is
switched off. In addition, prior to restarting the machine,
we recommend waiting until the coil is fully drained and
the solvent has totally evaporated.
HOT WATER COIL
At the start of the heating season, check the following:
- There is sufficient water in the system
- The battery has been correctly drained
- The percentage of antifreeze proportion is
sufficient for the degree of protection required.
CONDENSATION TRAY AND DRAIN
TRAP
The tank must be free of sediment and dirt which could
block the movement of condensation. Check that the
siphon is not obstructed. This inspection must be
carried out at least once a year, preferably at the start
of the air-conditioning season.
GAS BURNER
Once a year, before the heating season, clean the
burners and the exchanger pipes using a nylon brush,
the smoke box and the extraction fan.
Check that the air inlet pipe to the safety thermostats
(1) is not obstructed.
Check and adjust if necessary the min./max. pressure
settings on the controllers.
Check the position of the ionisation sensors and check
the ignition electrode.
To disassemble the burner, refer to the "GAS
BURNER" section (1): c.f. reference on the "Gas
Burner" diagrams.
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