Rev. B 08-2017
34
MTEC.4680.GB-B-1 Operation and maintenance manual GH serie English
GH Dehumidifiers for radiant cooling system
7. MAINTENANCE OF THE UNIT
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.
7.1 General warnings
Maintenance can:
Keep the equipment operating efficiently•
Prevent failures•
Increase the equipment life •
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 dischar-
ge 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.
7.2 Drive access
Access to the unit once installed, should only be possible to authorized operators and technicians. The owner of the equipment is the com-
pany 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.
7.3 Periodical checks
7.3.1 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. •
• Periodically clean movable and fixed contacts of contactors.
• Check that there are no water leaks in the hydraulic circuit.
• Check that the switch works properly, clean the metal filter installed on the water pipe.
• Clean draining pan and pipeline (monthly).
• Check the condition of the finned coil, if necessary, clean with compressed air in the opposite direction of air flow. If case of obstructed coil or
completely blocked, clean it with a dry low pressure, taking care not to damage the aluminium fins.
• Check mounting and balancing of the fans.
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