64
Danger
The refrigerant is a non-poisonous gas that dis-
places air. Uncontrolled escape of refrigerant in
enclosed spaces can result in breathing difficul-
ties and suffocation.
■
Ensure adequate ventilation in enclosed
spaces.
■
Always observe regulations and guidelines on
handling this type of refrigerant.
Danger
Direct contact with refrigerant can be harmful to
skin.
Wear safety goggles and protective gloves when
working on the refrigerant circuit.
Check the connections for refrigerant leaks:
■
All swaged connections of the refrigerant lines
between the internal and the external unit
■
All brazed joints and threaded fittings of the refriger-
ant lines in the internal and external units
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
Work on the refrigerant circuit must
only
be car-
ried out by a certified contractor (in accordance
with EC 842/2006 and 303/2008).
Filling and venting the secondary side
Unsuitable fill and top-up water increases the level of
deposits and corrosion. This can lead to system dam-
age.
Observe VDI 2035 regarding quality and amount of
heating water, including fill and top-up water.
■
Flush the heating system thoroughly before filling.
■
Only fill with water of potable quality.
■
Soften fill and top-up water with a water hardness
above 3 °dH (0.53 mol/m
3
), e.g. with the small soft-
ening system for heating water: See Vitoset pricelist.
Commissioning, inspection, maintenance
Checking the refrigerant circuit for leaks
51
17 700 GB
