32
4000123923-2
Should it be necessary to change the gas type, a conversion kit
with instructions will be required.
This modification must only be carried out by a competent
person.
Conversion natural gas (G20) to G30/G31 :
Part No. A2011900 for 30 ci and 30 si.
Part No. A2031800 for 35 ci.
Setting the step pressure.
Adjusting the step pressure may be a necessary operation after
gas conversion or after changing the gas control valve when a
new replacement part is required.
15 Changing Gas Type
Proceed as follows:
• Gain access to the gas control valve, connect a pressure
gauge.
• Unclip the control box, see diagram 13.3.
• Run the appliance in heating mode.
• Read the burner pressure setting in heating mode, before the
boiler modulates.
• Adjust the central heating output to the minimum setting by
adjusting potentiometer P3, refer to commissioning section.
• Adjust the potentiometer P6 burner pressure to the desired
value, by inserting a small flat edge screw driver into the
arrowed slot, turn to adjust to the desired setting, see diagram
14.2.
• Return the potentiometer P3 to its initial value.
Diagram 16.1
9718
A
Bypass
The boiler has a built-in bypass, refer to diagram 16.1.
The boiler is supplied with the bypass open half a turn. It should
not be necessary to adjust the bypass, but if required ensure
that under no circumstances does the flow rate fall below the
figures specified, refer to table 1. in section 3 (turn clockwise
'A' to close the valve).
30ci/35ci shown
16 Bypass Settings
To Next Page
Loading...
