75
Refrigerant capacity per metre line
length (for line lengths from 12 m to
30 m)
Type AWB/AWB-AC
R410A in g/m
201.B04
20
201.B07
60
Type AWB/AWB-AC
R410A in g/m
201.B10
60
201.B13
60
Checking the refrigerant circuit for leaks
Danger
R410A is a non-poisonous gas
that displaces air. Uncontrolled
escape of refrigerant R410A in
enclosed spaces can result in dif-
ficulties in breathing and suffoca-
tion.
■ Ensure adequate ventilation in
enclosed rooms.
■ Observe and adhere to regula-
tions and guidelines about han-
dling refrigerant.
Danger
Direct contact with refrigerant
can harm skin.
Wear safety goggles and protec-
tive gloves when working on the
refrigerant circuit.
Check all connections for refrigerant
leaks:
■ All swaged connections of the refrig-
erant lines between the internal and
the external unit.
■ Solder joints and threaded fittings of
the refrigerant lines in the internal and
external units.
Note
Work on the refrigerant circuit may only
by carried out by certified personnel
(according to EC Directives 842/2006
and 303/2008).
Filling and venting on the secondary side
Unsuitable fill and top-up water increa-
ses the level of deposits and corrosion
and may lead to system damage.
Regarding the quality and amount of
heating water, incl. fill and top-up water,
observe the VDI 2035 [or local regula-
tions].
■ Thoroughly flush the entire heating
system prior to filling it with water.
■ Only use fill water of potable quality.
■ Soften fill water with a hardness above
16.8 °dH (3.0 mol/m
3
), e.g. with the
small softening system for heating
water (see the Viessmann Vitoset
pricelist).
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5604 692 GB
Service
