Outdoor coils
The complete surface of the fins must be kept clean. If they need to be cleaned, use a soft brush or a
vacuum cleaner, taking special care not to damage the fins.
Given that they are exposed to the outdoors, the fins can accumulate a lot of dirt and grime (dust, soot,
sand, etc.). To clean the fins more thoroughly, use water with a neutral detergent (e.g. washing-up liquid).
Clean from the inside out and from top to bottom.
Outdoor air intake (accessory)
If the system has an economiser, motorised damper or energy recuperation system, maintenance work
should be performed for the air filters included on the inside of the rain hood.
Check that the aluminium mesh and the filter frames are in good condition.
If necessary, clean the filters more completely using water with a neutral detergent (for example house‐
hold dish soap).
C A U T I O N
The filters have an arrow indicating airflow direction stamped on the frame, the arrow should point to the
inside of the unit.
Cooling Circuit
Before the start of each season when the unit is in use, a thorough check of the refrigerant circuit must
be made, including operating pressures, controls and temperature rises, etc.
Electrical and mechanical operation
Before the start of each season when the unit is in use, check the consumption (in amps) of all motors,
the condition of the electrical connections and the correct working order of the safety and protection
systems.
The motor bearings for both the indoor and outdoor fans are permanently lubricated and do not need
additional lubricant during maintenance.
If the unit has an economiser, motorised damper or barometric relief damper
(accessory):
Check that the air dampers and their drive motors work correctly.
If the unit has an axial exhaust fan (accessory):
Check the condition of the fan and the operating control.
Condition of the unit structure and components
Check the correct condition of the unit structure and outdoor components for knocks, dents, scratched
paint or rust. Check that screws are properly secured and the condition of leak-proof seals and panel
locks and make sure they close properly.
Hot water coil (accessory)
Before the start of each season of operation, check the level of water in the system, that air has been
purged from the coils, and the operation of control components.
Depending on the climate where the unit is installed, the mix of anti-freeze and water must be checked.
Installation manual
1
Regular maintenance tasks performed by specialised personnel 1.18
37
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