22
OPENING OF ACCESS PANELS
All access panels are removable by unscrewing the self tapping retaining screws.
COILS
The refrigeration system is hermetically sealed and should require no regular maintenance. However, it is
recommended to leak test the refrigerant system and check the general operating conditions and control devices
on a regular basis. The operating pressures should be checked particularly as they are an excellent guide for
maintenance. After any intervention requiring the opening of the refrigerant circuit, the system must be completely
vacuum drained by using the 3 take-offs (VP) installed for this purpose (VP) (Refer to the appended refrigerant
circuit diagram).
Clean the heat exchanger using a special product for aluminium-copper heat exchangers, and rinse with water.
Do not use hot water or steam, as this could cause the pressure of the
refrigerant to rise.
Check that the surface of the aluminium fins of the heat exchanger is not
damaged by impacts or scratches, and clean with an appropriate tool if
necessary.
The air filter located on the air intake must be cleaned or replaced at regular
intervals to ensure that unit operate properly,.
A clogged filter causes a reduction in the airflow across the heat exchanger
and this reduces the performance output.
The G4 high efficiency filters located on slide rails upstream of the evaporator
enable the filters to be removed from the outside of the unit housing.
IT IS RECOMMENDED THAT THE DISCONNECT SWITCH BE PADLOCKED
CAUTION
BEFORE CARRYING OUT ANY OPERATION ON THE EQUIPMENT, CHECK
THAT THE ELECTRICAL POWER SUPPLY IS SWITCHED OFF AND THAT IT
CANNOT BE SWITCHED ON INADVERTENTLY.
ELECTRICAL SECTION
Check that the main power supply cable is not damaged or altered in such a way as to affect the insulation
Check that the interconnecting cables between the two units are not damaged or altered, and that they are correctly
connected.
The contact surfaces of relays and contactors should be inspected regularly by an electrician and replaced as
judged necessary. On these occasions the control box should be blown out with compressed air to remove any
gathwing of dust.
Check the earth grounding connection.
BLOWER DRIVE SYSTEM
blower shaft and motor bearings are of permanently lubricated, sealed type and require no regular maintenance
other than a check on their general condition. The blower belt tension should be checked regularly and belt surfaces
inspected for cracks or excessive wear.
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