10
10777 - GB-CZ-HU-PL-RO-RU - 0 - 04 / 07
Observations
Correctives actions
Starts well when cold
No changes required.
Starts with a bang when the
boiler and flue are cold
Check the electrodes and the setting of air at the head (measure the head pressure).
If the problem persists, screw the head adjustment screw (item 3) out by a half turn and
check the combustion.
7.2
Put the burner in the maintenance position
- Unscrew the 4 screws (reference A)
- Take down the back half casing.
7
ANNUAL MAINTENANCE
- Switch off the burner.
- Disconnect the programming unit boiler connector.
- Close the fuel valve.
- Take off the cover.
7.1
Pump maintenance
- Clean the fuel pump filter
6.7
Head air pressure
This measurement is highly representative of settings. During final setting made from information in the table on page 10, the
pressure shall be between 3 and 4 mbar of the head of water for the low fuel flow version and 3.5 to 4.5 mbar of the head of
water for the high fuel flow version.
NB: Traces of soot form very quickly on the flame stabiliser when all the combustion settings are correct. These traces of soot
are quite normal and remain stable.
6.8
Safety checks
- Check that the burner is on safe by covering up the cell.
- Check that the cut-off devices (limiter thermostat, safety thermostat, regulator, switch etc.,) stop burner operation.
6.9
Checking starting
G
I
I1
A
A
A
A
G
I
I1
A
A
A
One stage burner
Two stage burner
Too high pressure = blown flame, rough start
Too low pressure = head clogging
Zone de travail
Head air pressure (mbar)
Max.
Min.
11,5
12
12,5
13
13,5
CO
2
as %
6.0
5.5
5.0
4.5
4.0
3.5
3.0
Pump filter No.4 hex
head wrench
