68
Filling refrigerant lines and the internal unit
Note
■ The external unit is pre-filled with
refrigerant R410A
■ No topping up is required for line
lengths up to 12 m
■ Max. line length for refrigerant lines:
Type AWB/
AWB-AC
Max. cable
length
201.A04
20 m
201.A07
30 m
201.A10
30 m
201.A13
30 m
■ The refrigerant R410A may only be
topped up in a liquid state
■ Before topping up, the 4-way diverter
valve of the external unit must be set
to "Cooling"
Changing the 4-way diverter valve to
"Cooling":
1. Press OK +
å
simultaneously for
approx. 4 s
2. "Service functions"
3. "Function check"
4. "Cooling with external unit"
Service instructions for
Vitotronic 200 heat pump con-
trol unit
Danger
Direct contact with refrigerant
can cause skin damage.
Wear safety goggles and protec-
tive gloves when working on the
refrigerant circuit.
!
Please note
Topping up the system with
refrigerant or evacuating the
refrigerant can result in appliance
damage.
Flush the secondary side of the
plate heat exchanger of the inter-
nal unit with water or drain it com-
pletely.
!
Please note
With
all
connections,
counterhold with a second open-
ended spanner.
Line lengths up to 12 m:
1.
Unscrew the end of the filling hose
from the external unit service valve.
2.
Fit the union nut with copper cap to
the service valve of the external unit:
torque 15 to 20 Nm.
3.
Unscrew the cap on the external unit
filler valve, open the filler valve and
screw the cap back on again.
Line lengths from 12 m to 30 m:
1.
Connect hose between pressure
gauge set and refrigerant bottle.
Evacuate hose and pressure gauge
set.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5601 429 GB
