62
Line lengths 12 to 30 m:
1.
Connect the hose between the pressure gauge set
and refrigerant bottle.
Evacuate the hose and pressure gauge set.
2.
Recharge with the required amount of refrigerant:
see following table.
!
Please note
Escaping refrigerant will cause environmen-
tal pollution.
Extract refrigerant from the fill hoses and
pressure gauge set.
3.
Close valves at the pressure gauge set.
4.
Remove the caps from the shut-off valves of the
outdoor unit.
5.
Open both shut-off valves and refit the caps.
6.
Promptly undo the fill hose from the service valve
(Schrader valve) of the outdoor unit: the pressure
in the pipework must be greater than the ambient
pressure.
7.
Fit the union nut with copper cap to the service
valve (Schrader valve) of the outdoor unit: torque
15 to 20 Nm
8.
Enter the amount of refrigerant recharged on the
type plate and in the operator's log.
Information for systems with a refrigerant
charge of 2.35 kg R410A or more:
■
The operator's log must be maintained.
■
An annual tightness test is mandatory.
Refrigerant charge per metre line length (for line
lengths from 12 m to 30 m)
Type AWB/AWB-M/AWB-E-AC/
AWB-M-E-AC
R410A in g/m
201.D04
17
201.D06
17
201.D08
60
201.D10
28
201.D13
28
201.D16
28
Checking the refrigerant circuit for leaks
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 the 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
Charging the refrigerant lines and indoor unit
(cont.)
5790 931 GB
