Burner Start-Up Cycle; Air Pressure Switch - Riello Burners BS1D Manuel D'entretien

IONIZATION CURRENT
The minimum current necessary for the control box operation is 5 µA.
The burner normally supplies a higher current value, so that no check is needed.
Anyway, if you want to measure the ioni-
zation current, you have to open the con-
nector (C) (see electrical scheme page 6)
fitted on the wire and insert a microamme-
ter. (See fig. 11).

4.3 BURNER START-UP CYCLE

Normal
Thermostat
Motor
Ignition transformer
First valve
First flame
Second valve
Second flame
Lock-out
A
Lock-out is indicated by a lamp on the control box (4, fig. 1, page 1).
When the flame-failure occurs during working, shut down takes place within one second.

4.4 AIR PRESSURE SWITCH

The air pressure switch is set after all other adjustments have been made. Begin with the switch at the lowest
setting. With the burner working at the required output, adjust the dial clockwise, increasing its value until the
burner shuts down. Now reduce the value by one set point, turning the dial anti-clockwise. Check for reliable
burner operation, if the burner shuts down, reduce the value by a half set point.
ATTENTION:
To comply with the standard, the air pressure switch must operate when the CO value exceeds 1%
(10,000 ppm). To check this, insert a combustion analyser in the flue, slowly reduce the burner air set-
ting and verify that the burner shuts down by the action of the air pressure switch before the CO value
exceeds 1%.
5. MAINTENANCE
The burner requires periodic maintenance carried out by a qualified and authorised technician in conformity
with legislation and local standards.
Maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel and
consequent pollution.
Before carrying out any cleaning or control always first switch off the electrical supply to the
burner acting on the main switch of the system.
THE BASIC CHECKS ARE:
Leave the burner working without interruptions for 10 min. and checking the right 1 st and 2 nd stage settings
of all the components stated in this manual. Then carry out a combustion check verifying:
•
Content of CO 2 ( % )
2315
40s min.
3s max.
•
Content of CO (ppm)
Fig. 11
Terminal block
of control-box
Lock-out, due to light failure
5 – 25s
•
Smoke temperature at the chimney.
9 GB
Connector
D5006
40s min.
3s max.
Probe
A
D5016