38
Installation and maintenance instructions 0020244997_07
Condition
: The CO
₂
content must be adjusted
1
2
▶
Pierce the covering cap
(1)
at the mark using a small flat-
blade screwdriver and unscrew it.
▶
After performing the adjustments, tilt the air intake pipe
back up.
▶
Check the CO
₂
content again.
▶
If necessary, repeat the setting process.
▶
Set the CO
₂
content (value with front casing removed) by
turning the screw
(2)
.
–
Higher CO
₂
content: Turn anti-clockwise
–
Lower CO
₂
content: Turn clockwise
▶
For natural gas only: Only perform the adjustment in in-
crements of 1 turn and wait approx. 1 minute after each
adjustment until the value stabilises.
▶
For liquefied petroleum gas only: Only perform the ad-
justment in small increments (approx. 1/2 turn), and wait
approx. 1 minute after each adjustment until the value
stabilises.
▶
Check the CO
₂
content again.
▶
If necessary, repeat the setting process.
▶
Press
(
Cancel
) once the adjustments have been
made.
▶
If an adjustment is not possible in the specified adjust-
ment range, you must not start up the product.
▶
If this is the case, inform Customer Service.
▶
Screw the covering cap back in.
▶
Install the front casing.
9.16
Thoroughly flushing the heating installation
("hot")
1.
Operate the appliance until the boiler and the heating
system are up to temperature.
2.
Check the heating system for leaks.
3.
Connect a hose to the drain valve located at the lowest
position of the heating system.
4.
Shut off the boiler, open the drain valve and all purge
valves on the radiators and allow the water to flow out
of the heating system and the boiler quickly and fully.
5.
Close the drain valve.
6.
Fill the heating system again with water as described in
Filling the heating installation (
Page 35) and Purging
the heating installation (
7.
Re-fill the system until the system design pressure of
0,1 MPa (1,0 bar) is attained.
Note
The actual reading on the digital pressure
gauge should ideally be 0,05 MPa (0,5 bar)
plus an additional pressure corresponding
to the highest point of the system above
the base of the boiler
–
10 m head equals
an additional 1 bar reading on the pressure
gauge. The minimum pressure should not
be less than 0,1 MPa (1 bar) in any install-
ation. If the system is to be treated with an
inhibitor it should be applied at this stage in
accordance with the manufacturer’s instruc-
tions.
8.
Install the front casing.
9.17
Checking leak-tightness
▶
Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
▶
Check that the air/flue pipe has been installed correctly.
Condition
: Room-sealed operation
▶
Check whether the vacuum chamber has been closed
tightly.
9.17.1 Checking the heating mode
1.
Make sure that there is a heat requirement.
2.
Call up
Live monitor
.
◁
If the product is working correctly, the display
shows
S.04
.
9.17.2 Checking the hot water generation
Validity:
Product with integrated hot water generation
1.
Open a hot water valve all the way.
2.
Call up
Live monitor
.
◁
If the hot water generation is working correctly,
S.14
appears in the display.
