Maintenance; Troubleshooting; General; Standard Inspection And Maintenance Operations - DeDietrich AWHP 4 MR User Manual

7

Maintenance

7.1

Troubleshooting

7.2

General

7.3

Standard inspection and maintenance operations

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Caution
All work on the refrigeration circuit must be done by a qualified
professional, according to prevailing codes of practice and safety
in the profession (recovery of the refrigerant, brazing under nitro­
gen). All brazing work must be done by qualified welders.
Caution
This appliance is fitted with pressurised equipment, including the
refrigeration pipes.
Caution
Use only original parts to replace a defective refrigeration compo­
nent.
Caution
Use only dehydrated nitrogen for detecting leaks or for pressur­
ised tests.
Caution
The safety devices may only be set, corrected or replaced by a
qualified professional.
Maintenance operations are important for the following reasons:
To guarantee optimum performance.
To extend the life of the equipment.
To provide an installation which offers the customer optimum comfort
over time.
Caution
Maintenance work must be carried out by a qualified professional.
Danger
Before any work, switch off the mains electricity to the heat pump
and the hydraulic or electrical back-up if connected.
Caution
Before working on the refrigeration circuit, switch off the appliance
and wait a few minutes. Certain items of equipment such as the
compressor and the pipes can reach temperatures in excess of
100°C and high pressures, which may cause serious injuries.
Caution
Do not drain the installation, except in cases of absolute necessi­
ty. E.g.: several months' absence with the risk of temperatures in
the building falling below freezing.
An annual inspection with tightness check is obligatory. Schedule a serv­
ice by a qualified professional at a cold time of the year to check the fol­
lowing points:
1. Have a qualified professional check that the installation is perform­
ing correctly at each periodic service.
2. Have a qualified professional check the heat output by measuring
the difference in temperature between heating flow and return.
3. Have a qualified professional check the safety thermostat settings.
7 Maintenance
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