Viessmann AWT-AC 241.A04, Инструкция по установке и обслуживанию

Страница: 69 / 168

69
Charging the refrigerant lines and internal unit
Note
■ The external unit is pre-charged with
refrigerant R410A.
■ No topping up is required for line
lengths from 3 to 12 m.
■ For lengths of refrigerant lines, see
page 25.
■ 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 cause the con-
denser to freeze up.
Flush the secondary side of the
condenser with water or drain it
completely.
!
Please note
Prevent damage to connections.
For
all connections, counterhold
with a second open-ended span-
ner.
Line lengths 3 to 12 m:
1. Close shut-off valve.
2. Undo the caps from the fill valves of
the external unit. Open both fill valves
and refit caps.
Note
Both fill valves must be open when
the appliance is switched on.
3. Promptly remove the fill hose and
shut-off valve from the service valve
of the external unit: The pressure in
the pipework must be greater than
ambient pressure.
4. Fit the union nut with copper cap to
the service valve of the external unit:
Torque 15 to 20 Nm.
Line lengths 12 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: See table below.
!
Please note
Refrigerant must not be
allowed to escape into the
environment.
Extract refrigerant from the fill
hoses and pressure gauge
set.
3. Close valves at the pressure gauge
set.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5546 699 GB
Service