Maintenance; Routine Maintenance - Hitecsa EQS 2335 Manual Del Usuario

II.10

MAINTENANCE

IMPORTANT!
Maintenance is reserved exclusively for skilled
personnel from workshops authorised by HITECSA
qualified to operate on this type of products. Pay
close attention to the danger signs on the unit. Use
the personal protective equipment foreseen by
current laws.
Pay the utmost attention to the symbols located on
the unit. Use EXCLUSIVELY original HITECSA
spare parts.
II.10.1

Routine maintenance

Control
General cleaning and checking unit
MCHX coils
MCHXE coils
Fans
Compressor: oil check
Exchangers
Water filter
II.10.1.1 General cleaning and checking unit
IMPORTANT!
Before cleaning the unit, shut off and lock the main
power supply switch of the unit and open all access
panels.
IMPORTANT!
Always use the personal protective equipment
foreseen by law (goggles, earmuffs, gloves, etc.).
Every six months, the unit should be cleaned using a moist cloth.
Every six months it is also good practice to check the general conditions
of the unit. In particular, make sure there is no corrosion on the unit
structure. Any corrosion must be treated with protective paints in order
to prevent possible damage.
II.10.1.2 Cleaning the coils
DANGER!
Pay attention to the edges of the coil
The coils must be washed and brushed gently with water and soap.
Remove any foreign bodies from the condensing coils which may block
the passage of air, such as: leaves, paper, debris, etc.
Replace the coils should it not be possible to clean them.
Failure to clean the coils increases load losses and therefore reduces
overall performance of the unit in terms of its flow arte.
It is recommended to mount RPB accessories to safeguard the coils:
protective coil grilles.
Frequency
Every 6 months, the unit must undergo
general washing and its status must be
checked
At least every 6 months
At least every 3 months
Variable depending on where the unit is
installed.
Every 6 months
Every 12 months
At least every 6 months
II.10.1.3 Cleaning of MCHX micro-channel coils
When steam- or high-pressure cleaning:


In order to prevent warping and damage of fins:

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75
DANGER!
Always act on the general automatic switch
protecting the system before carrying out any
maintenance work, even if it is purely for inspection
purposes. Make sure that no one supplies power to
the machine accidentally; lock the master switch in
zero position.
DANGER!
Pay attention to high temperatures near the
compressor heads and the supply pipes of the
refrigeration circuit.
Notes
Any points where corrosion is starting need to be
touched up with protective paint.
The fan grilles must be kept clear from any
obstructions.
The lubricating oil level in the compressor can be
checked by means of the sight-glass.
Any incrustation of the exchanger may be detected by
measuring the pressure-drop between the inlet and
outlet pipes, using a differential pressure gauge.
It is mandatory to install a mesh filter on the unit's inlet
water piping. This filter must be cleaned from time to
time.
DANGER!
Damage due to high pressure!
Keep minimum distance of 400 mm.
If possible, always clean in the opposite direction of the air flow.
Always align cleaning jet at right angles with fins of condenser.
Brush exclusively in longitudinal direction of fins.
Before starting, verify suitability of all cleaning methods on a small
part of the device.
To guarantee free air circulation:

For economical and reliable operation:

Note
The frequency of the cleaning
interventions depends on the
installation site
If possible, always clean in the opposite direction of the air flow.
Remove dry dust and dirt or normal soiling with:
○
soft brush or hand broom
○
compressed air (3 to 5 bar)
○
industrial vacuum cleaner
○
hosepipe (water, 3 to 5 bar)
Remove coarse or stubborn dirt with:
○
high pressure cleaner (max pressure 50 bar; min. distance 400
mm; fan with nozzle)
○
steam cleaner (max. pressure 50 bar; min. distance 400 mm; fan
with nozzle)
○
Use neutral cleaning agent if necessary.
○
Avoid aggressive or corrosive detergents in order to not affect the
aluminium or the rest of the unit.
○
Once cleaning is finished, there must not be any traces of
detergent on the condenser.
EQS
clean the condenser regularly
remove leaves, paper, dust,
pollen, etc. from the condenser