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EN
Service and Maintenance
Note:
Within the first couple of months of installation, remove and clean the hydrobox’s strainer plus any that are fitted external to the hydrobox. This is especially
important when installing on an existing system.
In addition to annual servicing it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instructions.
Replacement and inspection of parts should always be done by a competent person with relevant training and qualifications.
Parts which require regular replacement
Parts
Replace every Possible failures
Pressure relief valve (PRV)
Air vent (Auto/Manual)
Drain cock (Primary circuit)
Manometer
6 years
Water leakage
Parts which require regular inspection
Parts
Check every
Possible failures
Immersion heater
2 years
Earth leakage causing
circuit breaker to activate
(Heater is always OFF)
Water circulation pump
20,000 hrs (3 years) Water circulation pump
failure
Parts which must NOT be reused when servicing
* O-ring
* Gasket
Note:
Always replace the gasket for pump with a new one at each regular maintenance
(every 20,000 hours of use or every 3 years).
Annual Maintenance
It is essential that the hydrobox is serviced at least once a year by a qualified individual any spare parts required MUST be purchased from Mitsubishi Electric (safety matter).
NEVER
bypass safety devices or operate the unit without them being fully operational.
