Viessmann Vitocal 242-S, Инструкция по установке и обслуживанию

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75
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 from 3 to 12 m.
■ For lengths of refrigerant lines, see
page 33.
■ Refrigerant R410A may only be top-
ped up in a liquid state.
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 3 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 caps on the external unit
fill valves, open both fill valves and
refit the caps.
Note
When the heat pump starts, both fill
valves must be open.
Line lengths 12 m to 30 m:
1. Connect hose between pressure
gauge set and refrigerant bottle.
Evacuate hose and pressure gauge
set.
2. Top up the required amount of refrig-
erant (see following table).
!
Please note
Refrigerant must not be
allowed to enter the atmos-
phere.
Draw refrigerant out of the fill
hoses and pressure gauge
set.
3. Close valves on the pressure gauge
set.
4. Unscrew the end of the filling hose
from the external unit service valve.
5. Fit the union nut with copper cap to
the service valve of the external unit:
torque 15 to 20 Nm.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5623 661 GB
Service