Specifications

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6720649497 SM HP270-1 2012/09 en
Components checking procedure
Unit
o Inspect all the elements in the installation place
o Check the airflow clearances
o Check the output temperature
o Clean the evaporator coils as following:
– Clear the outside of the coil of debris
– Vacuum the coil fins using a soft bristle brush attachment – take care to avoid bending the fins
– Spray water from the inside to the outside of the coils to remove stuck debris using a hose and spray gun
– Vacuum or remove by hand any remaining debris in the unit
o Check if coil fins are damage – if bent, straighten them using a proper tool
o Lubricate fan bearings if required – sealed bearing units do not require any oiling
o Inspect fan and repair, if required
o Ensure that the condenser unit is secure and levelled in both directions. If necessary, adjust the levelling
feet on the appliance, or make level with timber/plastic shims. If the unit is seriously out of level, repair or
replace the base of the unit.
Refrigerant
o Check the operation of the air-on/air-off with a digital thermometer
o Check pipe joints for refrigerant leakage, with a bubble solution
Electrical
o Check terminals and connections – clean and tight if necessary
o Check the voltage and current
Service checklist
o Provide the end-user with a filled service checklist after each service
o Explain the importance of the thermal disinfection function (anti-legionella protection) for the water quality
inside the tank
3.1 Components and Checks in the Refrigeration Unit
The science of refrigeration is based on the fact that the liquid can be vaporized at any desired temperature by
changing its pressure. Taking in consideration the example of water, that under a normal atmospheric pressure of
1,01 bar boils at 100ºC, if in a closed vessel under a higher pressure, it boils at a higher temperature.
ATTENTION
The technician for the refrigeration circuit must have specific material and tools to deal with these circuits and make
the measurements and controls in the correct way, respecting the existing standards.