12
C
E
D
A
B
Cascade
1
2
3
4
5
Fig. 6
A
ON/OFF switch
B
MCB/fuse
C
ON indicator (green)
D
Fault indicator (red)
E
Emissions test switch
(only for servicing purposes)
Ask your heating contractor about the following:
■
Boiler and relevant control unit type
■
Level of the required system pressure
■
Position of the following components:
–
Pressure gauge
–
Gas shut-off valve
–
Vents
1.
Check the heating system pressure at the
pressure gauge. If the pressure of the heating sys-
tem is too low, top up the water or notify your heat-
ing contractor.
2.
Open the gas shut-off valve on every boiler.
3.
Switch ON the power supply, e.g. at a separate
MCB/fuse or a mains isolator.
4.
Switch ON the ON/OFF switch on
every
control
unit.
After a short delay, the standard menu or the
default display appear. The green ON indicator illu-
minates. Your heating system and, if installed, your
remote controls are now ready for use.
Shutting down the heating system
With frost protection monitoring
For
every
heating circuit select the
"standby mode"
operating program (see page 17).
■
No central heating
■
No DHW heating
■
Frost protection for the boiler and the DHW cylinder
is active.
Note
The circulation pumps are briefly started every 24
hours to prevent them from seizing up.
Without frost protection monitoring (shutdown)
1.
Switch OFF the ON/OFF switch on
every
control
unit (see page 12).
2.
Close the gas shut-off valves.
3.
Isolate the heating system from its main power sup-
ply, e.g. at the separate MCB/fuse or at a mains
isolator.
!
Please note
If outside temperatures of below 3 °C are
expected, take appropriate measures to pro-
tect the heating system from frost.
If necessary, contact your heating contractor.
Start-up/shutdown
Switching on the heating system
5546 498 CA
