Work On The Heat Pump - Viessmann Vitocal 300-G Pro Series Installation And Service Instructions For Contractors

Occupational safety
Note
Observe all information in the "Safety instructions".
For further information regarding electrical connec-
tions, see from page 30.

Work on the heat pump

Note
Before commissioning and after repair or maintenance
work, check that the heat pump is in the intended con-
dition.
Work on the refrigerant circuit
Danger
Direct contact with refrigerant can be harmful to
skin.
Only work on the refrigerant circuit whilst
■
wearing safety goggles and gloves.
Note
Work on the refrigerant circuit must only be
carried out by a qualified refrigeration engi-
neer.
Wear suitable protective clothing.
■
Danger
Refrigerant circuits of heat pumps develop
extremely low ( 25 °C) and very high (+130 °C)
–
temperatures. Work on heat pumps can result in
life threatening frostbite and burns.
Switch off the heat pump at least 30 min
■
before working on it.
■ Never touch the injection valve or compressor
with bare hands; wear safety gloves if contact
is necessary.
■ Wear suitable protective clothing.
Work on the casing
Danger
Breaking through the knockouts on the back
panel leaves behind sharp edges from the metal
retaining tabs that can lead to life threatening
injuries.
■ Finish and seal the edges appropriately before
installation.
(cont.)
Danger
Falling of heavy or unwieldy heat pump compo-
nents can result in life threatening crushing or
breaks.
■ Always use suitable ropes/slings and lifting
gear when installing/dismantling compressors,
heat exchangers or similar.
Wear appropriate protective clothing (e.g.
■
safety boots) in compliance with applicable
regulations on accident prevention and in line
with trade association recommendations.
Danger
Refrigerant R410A is a non-poisonous gas that
displaces air. Unregulated escape of refrigerant
R410A in enclosed spaces can result in difficul-
ties in breathing and suffocation.
■ Never breathe in refrigerant vapours.
■ Ensure adequate ventilation in enclosed
spaces.
■ Prevent open flames.
Always observe regulations and guidelines on
■
handling this type of refrigerant.
Note
Damage to the surfaces of the casing can lead to cor-
rosion.
Safety and liability
7