Page 40 of 51
Boilers with a single gas valve: SCB 60 up to 120 kW:
- Converting from Nat. gas to LPG:
1.
Turn the small "throttle"(see page 29) screw 2 clockwise about nr. 4 half turns.
2.
press the service switch (with a pen).
3.
The appliance should start: when there is no ignition, open the throttle 2 (anti - clockwise) with
about another half turn.
4.
Turn the red control knob on the control panel to the maximum -the speed of the fan will go to
maximum: the colour of the flame should be blue: if yellow, give a little less gas (throttle
clockwise, or when the flame disappears, anti- clockwise).
5.
When the flame has the right colour: place the analyser in the measuring hole of the tube not before,
otherwise you could get too much CO in the analyser .
6.
Set the throttle screw 2to obtain a reading of about 100 ppm CO Note CO² % is not important it will
be around 9,5 %.
7.
Turn the red control knob on the control panel to the left to about 9 O’Clock.
8.
Set the screw 2 to obtain about 50 ppm CO.
9.
Turn the red control knob on the control panel to the minimum.
10.
Set the screw 1 so the analyser shows a CO value lower than 10ppm.
11.
Turn the red control knob on the control panel to the maximum, to check the max. CO value, reset
(if required) the CO to less than 100 ppm with help of the Throttle screw.
When fitting a new gas valve:
1.
Open the throttle (see page 29) screw 2 (anti - clockwise)
completely
; then turn screw 8 half turns
clock wise.
2.
Press the service switch (with a pen).
•
The appliance should start, if there is no ignition, open the throttle (anti - clockwise) about
a half turn.
3.
Turn the red control knob
on the control panel
to the maximum -the speed of the fan will go to
maximum: the colour of the flame should be blue: if yellow give a little less gas (throttle clockwise,
or when the flame disappears, anti- clockwise).
4.
When the flame has the right colour: place the analyser in the measuring hole of the tube - not
before, otherwise you could get too much CO in the analyser.
5.
Set the throttle screw 2 to obtain a reading of: about 100 ppm CO (CO² % is not important it will be
around 9,5 %).
6.
Turn the red control knob
on the control panel
to the left about to 9 O’ Clock .
7.
Set the screw 2 to obtain about 50 ppm CO.
8.
Turn the red control knob
on the control panel
to the minimum.
9.
Set the screw 1 to obtain a CO value lower than 10 ppm.
10.
Turn the red control knob
on the control panel
to the maximum, to check the max. CO value , reset
(if required) the CO to less than 100 ppm with help of the Throttle screw.
