Check the water supply device and the release often. You should avoid the
condition of no water or air entering into system, as this will inuence
unit‘s performance and reliability. You should clear the pool/spa lter reg-
ularly to avoid damage to the unit as a result of the dirty of clogged lter.
The area around the unit should be dry, clean and well ventilated. Clean
the side heating exchanger regularly to maintain good heat exchange as
conserve energy .
The operation pressure of the refrigerant system should only be serviced
by a certied technician .
Check the power supply and cable connection often. Should the unit begin
to operate abnormally, switch it o and contact the qualied technician.
Discharge all water in the water pump and water system, so that freezing
of the water in the pump or water system does not occur. You should dis-
charge the water at the bottom of water pump if the unit will not be used
for an extended period of time. You should check the unit thoroughly and
ll the system with water fully before using it for the rst time after a
prolonged period of no usage.
Checks to the area
Prior to beginning work on systems containing ammable refrigerants,
safety checks are necessary to ensure that the risk of ignition is mini-
mised. For repair to the refrigerating system, the following precautions
shall be complied with prior to conducting work on the system.
Work procedure
Work shall be undertaken under a controlled procedure so as to minimise
the risk of a ammable gas or vapour being present while the work is be-
ing performed.
General work area
All maintenance sta and others working in the local area shall be in-
structed on the nature of work being carried out. Work in conned spaces
shall be avoided. The area around the workspace shall be sectioned o.
Ensure that the conditions within the area have been made safe by control
of ammable material.
Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior
to and during work, to ensure the technician is aware of potentially am-
mable atmospheres. Ensure that the leak detection equipment being used
is suitable for use with ammable refrigerants, i.e. non-sparking, ade-
quately sealed or intrinsically safe.
Presence of re extinguisher
If any hot work is to be conducted on the refrigeration equipment or any
associated parts, appropriate re extinguishing equipment shall be avail-
5. MAINTENANCE AND INSPECTION
33
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