12
5.03 Startup with the HONEYWELL V4400C in models 85-102 (fig. 7b)
Set the boiler control thermostat 2 (fig. 2), to minimum. Switch off electrical power.
Open the gas cock upstream from the boiler.
Release the air held in the gas pipes by opening the incoming gas valve test point marked with the
number 3 (fig. 7b).
Press and keep pressed the gas valve control knob “A”.
Ignite the pilot burner by repeatedly pressing the piezoelectric ignition button 12 (fig. 2).
Once the pilot light has been ignited, keep the gas valve knob pressed for another 15 - 20 seconds and
then release it slowly checking that the pilot light remains lit. If it does not, wait 30 seconds before
igniting it again.
Switch on boiler.
Set the boiler regulating thermostat 2 (fig. 2) to the desired temperature (no less than 50
°
C).
At this point the main burner should ignite and the boiler operate automatically.
Key
1
Ignition button
2
Gas pressure regulating screw
3
Incoming gas pressure test point
4
Pilot light adjusting screw
5
Shutdown button
HONEYWELL V4400C VALVE
Fig. 7b
