Viessmann VITOCAL 300-G PRO Installation And Service Instructions Manual page 11

Occupational safety
Work on the refrigerant circuit
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 threaten-
ing frost bite and burns.
■ Switch off the heat pump at
least 30 min before working on
it.
■ If at all possible, avoid touching
the injection valve and com-
pressor; wear safety gloves, if
contact is necessary.
■ Wear suitable protective cloth-
ing.
Danger
R410A is a non-poisonous gas
that displaces air. Unregulated
escape of refrigerant R410A in
enclosed spaces can result in dif-
ficulties in breathing and suffoca-
tion.
■ 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.
(cont.)
Safety and liability
Danger
Direct contact with refrigerant
can be harmful to skin.
■ Only work on the refrigerant cir-
cuit whilst wearing safety gog-
gles and safety gloves.
Note
Work on the refrigerant cir-
cuit must only be carried out by
a qualified refrigeration engi-
neer.
■ Wear suitable protective cloth-
ing.
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