Hydraulic Safety; Recommendations For Operation; Specific Instructions For Service, Maintenance And Breakdowns - DeDietrich MIV-4S AWHP 6 MR-3 User Manual

1 Safety instructions and recommendations
1.6

Hydraulic safety

1.7

Recommendations for operation

1.8

Specific instructions for service, maintenance and breakdowns

8 MIV-4S
In order to limit the risk of being scalded, a thermostatic mixing valve must
be installed on the domestic hot water flow pipes.
When making the hydraulic connection, it is imperative that the standards
and corresponding local directives be respected.
If radiators are connected directly to the heating circuit: install a differential
valve between the indoor module and the heating circuit.
Keep a heating circuit without thermostatic valve and or without solenoid
valve in order to avoid having all valves closed at the same time.
Fit drainage valves between the indoor module and the heating circuit.
Do not add any chemical products to the heating water without first con­
sulting a water treatment specialist. For example: antifreeze, water soften­
ers, products to increase or reduce the pH value, chemical additives
and/or inhibitors. These may cause faults in the heat pump and damage
the heat exchanger.
The frost protection function does not work if the heat pump is switched
off.
If the home is unoccupied for a long period and there is a risk of frost,
drain the indoor module and the heating system.
Keep the heat pump accessible at all times.
Never remove or cover the labels and data plates affixed to appliances.
Labels and data plates must be legible throughout the entire lifetime of the
appliance.
Immediately replace damaged or illegible instructions and warning stick­
ers.
Give preference to the OFF or frost protection mode rather than switching
off the system to leave the following functions running:
Anti blocking of pumps
Frost Protection
Regularly check the presence of water and pressure in the heating sys­
tem.
Do not touch radiators for long periods. Depending on the heat pump set­
tings, the temperature of the radiators may exceed 60°C.
Do not drain the installation, except in cases of absolute necessity. E.g.:
several months' absence with the risk of temperatures in the building fall­
ing below freezing.
Maintenance work must be carried out by a qualified professional.
Only a qualified professional is authorised to set, correct or replace the
safety devices.
Before any work, switch off the mains electricity to the heat pump, the in­
door unit and the hydraulic or electrical back-up if connected.
Wait for approx. 20-30 seconds for the outdoor unit capacitors to be dis­
charged, and check that the lights on the outdoor unit PCBs have gone
out.
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 pres­
sures, which may cause serious injuries.
Locate and correct the cause of power cut before resetting the safety ther­
mostat.
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