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6. Maintenance
6.7 Filter Sections
During system start-up, filters are likely to
become rapidly blocked.
Filter sections may be supplied with a
manometer, which gives a visual
indication of filter conditions and pressure
drop.
Throw-away panel filters and bag filters
must be replaced each time or when the
pressure drop reaches the indicated dirty
condition. Permanent synthetic or metallic
filters must be cleaned periodically.
Filters must be installed following the
direction of the airflow arrow.
Bag filter pockets should be vertical
when installed.
6.8 Coil Sections
In the event of coils being out of
commission for some time, it is advisable
to completely drain down the coil. On
each occasion when refilling is
undertaken, check that the coil is
effectively vented.
Periodic cleaning of the coils is required.
Dirty coils have increased airside
pressure drops and reduced heat
transfer, thus unbalancing the cooling or
heating system.
6.8.1. Cleaning
In the event that fin edges have been
bent, they can be straightened with the
aid of a coil comb.
The cleaning is carried out with the unit
intact using a powerful vacuum cleaner
on the dust-contaminated side. If the unit
is very dirty it will need to be removed and
wet cleaned.
If required, soft cleaning brushes may be
used ensuring that the heat exchanger
fins are not damaged.
6.8.2. Frost protection
Check that frost protection is working
before the commencement of each winter
period. Ensure that the frost sensor is
correctly installed and fitted and is
working within the correct temperature
range.
6.8.3. Drop eliminator
Check the cleanliness of the droplet
separator section and the blades
annually. If the blades are dirty, remove
and clean them. Contamination can result
in damage through water droplets in the
system and to a reduction in the system's
performance. Ensure that the blades are
correctly repositioned and that they are
not distorted.
6.8.4. Steam heater coils
In the case of steam heater batteries,
arrange for automatic steam shutoff when
the unit is at rest, and check the function
of the fan overrun in this context.
6.8.5. Direct expansion coils
Never use hot water or steam to clean
these coils. During normal operation, the
fin block must not ice up. If this occurs,
check the refrigeration system.
6.9 Electric Heaters
Check the heater for any dirt
accumulation. If required, clean the
heating elements with a soft brush. Check
safety controls and fan overrun controls.
6.10 Steam Humidifier
Maintain in accordance with the
manufacturer directions. The following
details are general purpose instructions:
Check the steam distributor and ensure
there are no undesirable deposits.
Check that the steam feeds do not leak.
Check that the condensate drain is
functioning.
6.10.1. Evaporative Humidifier
Any evaporative modules that are
strongly encrusted with calcium deposits
should be replaced. Trane cannot be
responsible for the proper cleaning of
evaporative humidifiers.
In order to avoid excess clogging of the
evaporative humidifiers, it is advisable to
interlock the spray pipe operation with the
fan operation.
6.11 Dampers
Check for dirt deposits, damage, or signs
of corrosion. Clean with high-pressure air
or with a steam jet.
6.12 Sound Attenuators
Silencer modules are basically
maintenance free. Within the framework
of wider maintenance programmes,
check for any dust deposits and vacuum
as necessary.
6.13 Weather Louvres/
Hoods
Check for any obstructions or blockages
in all of the air intakes and discharges.
6.14 Plate Heat Exchangers
Plate type heat exchangers are
aluminum; their service life is virtually
unlimited. Maintenance is limited to
cleaning operations. Clean the
condensate drain, check the trap, and top
up as necessary.
Any accumulation of fibres or dust at the
exchanger point-of-entry may be
removed with a brush or vacuum.
Any oil or greasy deposits must be
removed. If a bypass is fitted, maintain as
you would for dampers.
6.15 Heat Wheel
The drive unit should be maintained in
line with the manufacturer
recommendations. The construction of
the matrix is such that it is virtually
completely self-cleaning. The rotor may
be cleaned with pressurized air, water, or
steam jet and domestic detergents as
necessary.
IMPORTANT
CLCH-SVX05A-GB
