Viessmann AWS 104, Installation And Service Instructions For Contractors

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72
!
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. Undo the filling hose end with valve
port from the service valve of the
internal unit.
2. Fit the union nut with copper cap to
the service valve of the internal unit:
Torque 15 to 20 Nm.
3. Open the ball valves at the external
unit.
Line lengths from 12 m to 30 m:
1. Connect hose between pressure
gauge set and refrigerant bottle.
Evacuate hose and pressure gauge
set.
2. Top up with the required amount of
refrigerant.
!
Please note
Refrigerant must not be
allowed to enter the atmos-
phere.
Suction refrigerant from the fill
hoses and pressure gauge set
into the system.
Type AWS/AWS-
AC R410A in g/m
104 20
107 60
110 60
113 60
3. Close valves on the pressure gauge
set.
4. Undo the filling hose end with valve
port from the service valve of the
internal unit.
5. Fit the union nut with copper cap to
the service valve of the internal unit:
Torque 15 to 20 Nm.
6. Open the ball valves at the external
unit.
7. Enter the amount of refrigerant top-
ped up on the type plate and the oper-
ator's log.
Information for systems with a fill-
ing amount from 3.0 kg R410A:
■ An operator's log must be main-
tained.
■ Carry out a tightness test annually.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5724 152 GB