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7.
MAINTENANCE OF THE UNIT
G
ENERAL WARNINGS
Maintenance can:
• Keep the equipment operating efficiently
• Prevent failures
• Increase the equipment life
It is advisable to maintain a record book for the unit which details all operations performed on the unit as this will facilitate
troubleshooting.
Maintenance must be performed in compliance with all requirements of the previous paragraphs.
Use personal protective equipment required by regulations as compressor casings and discharge pipes are at high temperatures.
Coil fins are sharp and present a cutting hazard.
If the unit is not to be used during the winter period, the water contained in the pipes may freeze and cause serious damage. In
this event, fully drain the water from the pipes, checking that all parts of the circuit are empty including any internal or external
traps and siphons.
D
RIVE ACCESS
Access to the unit once installed, should only be possible to authorized operators and technicians. The owner of the equipment is
the Lochinvar Limited legal representative, entity or person owns the property where the machine is installed.
They are fully responsible for all safety rules given in this manual and regulations. If it is not possible to prevent access to the
machine by outsiders, a fenced area around the machine at least 1.5 meters away from external surfaces in which operators and
technicians only can operate, must be provided.
P
ERIODICAL CHECKS
The start-up operations should be performed in compliance with all requirements of the previous paragraphs.
All of the operations described in this chapter MUST BE PERFORMED BY TRAINED PERSONNEL ONLY. Before commencing
service work on the unit ensure that the electric supply is disconnected. The top case and discharge line of compressor are
usually at high temperature. Care must be taken when working in their surroundings. Aluminium coil fins are very sharp
and can cause serious wounds. Care must be taken when working in their surroundings. After servicing, replace the
cover panels, fixing them with locking screws.
Every 6 months
It is advisable to perform periodic checks in order to verify the correct working of the unit.
• Check that safety and control devices work correctly as previously described.
• Check all the terminals on the electric board and on the compressor are properly fixed.
• Check and clean the sliding terminals of the contactors.
• Check for water leaks in the hydraulic system.
• Check correct operation of the flow switch and clean the strainers on the pipework.
• Check the compressor crankcase heater has the proper supply and is functioning correctly.
• Check the colour of the sight glass core (green=no moisture, yellow=moisture present): if it has a yellow colour, change the
refrigerant filter.
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P a g e
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