Hamworthy Melbury HE 530 Installation And Operating Instructions Manual page 5

ELECTRICAL INSTALLATION
Electrical connections must be made exclusively by qualified personnel and all prevailing electrical regulations must
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be scrupulously observed.
Make sure that the electrical power supply used for connection conforms to the specifications indicated on the rating
plate and in this manual.
The unit must be correctly connected to an efficient ground system in conformity to the prevailing norms and
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checked and controlled for efficiency by qualified personnel when in doubt.
Never confuse neutral wires with phase wires.
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The unit must be hooked up to the electrical network with a plug-socket connection that is such as to prevent
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inversion of phase and neutral. Install a master switch for the heating plant as requested by existing legislation.
The entire electrical system, and all cable sections in particular, must be adequate to deliver the maximum absorbed
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power value indicated on the equipment's rating plate and in this manual.
If the mains power cable is found to be defective, it must be replaced only by qualified personnel.
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Never stretch power supply cables and keep them well away from sources of heat.
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FUEL
The unit must be fed with the type of fuel for which it has been preset as indicated on the rating plate.
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The fuel pressure must be according to the values listed in the burner manual.
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The fuel line that feeds the unit must be sized according to the requirements of local regulations and the
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prescriptions in the burner manual. The line must be perfectly sealed. The fuel supply line must also be equipped
with all the control and safety mechanisms required by local regulations in force. The line must be free from all
impurities; take particular care that foreign matter does not enter the line during installation.
Oil:
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The light oil storage tank must be adequately protected against penetration of impurities and water. The fuel tank
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must be kept full of fuel during the summer in order to avoid the condensation of humidity. Clean the tank
carefully before filling. Beware not to overfill the tank.
Both the tank and the unit fuel supply line must be protected from frost.
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Oil consumption and tank unit must be checked regularly, in order for leaks to be detected in good time.
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Gas:
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The gas line must be checked for leakage during commissioning and after each disconnection.
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MALFUNCTION
If the unit stops working and goes into lock-out and does not resume operation after two or three manual lock-out
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reset attempts, disconnect the power supply, do not attempt to repair, and contact a qualified specialist.
All repairs required must be performed exclusively at a technical servicing and/or technician centre authorized by the

manufacturer using original spare parts only. Failure to observe the above may compromise the reliability and safety
of the equipment.
Any failure or damage resulting from improper use or intentional damage will relieve the manufacturer from any
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guarantee obligation.
MAINTENANCE
Maintenance must be performed by qualified personnel regularly or at least once a year.
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Prior to performing any maintenance operations, switch off the power supply by using the main switch and cut off the
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fuel supply as well.
Only parts indicated by the manufacturer in the Spare Parts Catalogue may be replaced.
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In order to avoid all types of health hazards, suitable clothing and a protective mask must be worn for work on or with
components made of synthetic silicon mineral fibers (ceramic and glass fibers, insulation wool).
We reserve the right to make changes to dimensions and construction
Melbury HE, C 530 - 3000
3
Hamworthy Heating Limited – Dorset BH17 ONF
edition 12.2020