Gas Conversion - Potterton Sirius FS 50 Installation, Operation & Maintenance Manual

Proceed as follows to adjust the single gas valve:
• Insert the flue analysis probe into the flue sampling hole as instructed in section 17 (figure 17).
• Press and hold the
appear on the display in the position shown in figures 15a and 15b
mode'.
• Press the key to set the maximum heat output, with the display showing 100% (figure 15a).
caution: in the event of the boiler failing to ignite, or when replacing the mixer / gas valve group, the
recommended procedure is to tighten the adjuster screw (v) fully and then back off 10 turns for natural
gas (G20) and 5 turns for propane gas (LpG), repeating the steps described below.
Turn the adjuster screw V on the gas valve until you achieve the CO
•
gas (G20) and in table 2.2 for propane (LPG):
- Turn the screw anti-clockwise to increase the CO
- Turn the screw clockwise to decrease the CO
• Press the key to set the minimum heat output, with the display showing 0% (figure 13b).
• Remove the protection cap and turn the adjuster screw K on the gas valve until you achieve the CO
shown in table 2:
- Turn the screw clockwise to increase the CO
- Turn the screw anti-clockwise to decrease the CO
⇑
Figure 15a
IMportant: in the event of converting the boiler from natural gas (G20) to propane (LPG), the following
operation must be carried out before proceeding to adjust the gas valve as described above:
• Screw 5 turns the adjuster screw (V).
• Set parameters h536 - h541 - h608 - h609 - h610 - h611 - h612 - h613 by way of the display on the
control panel.
The values to be set are given in tables 2.1 and 2.2. The programming methods are described in chapter 14.
InstructIons pertaInInG to the InstaLLer
and keys on the control panel simultaneously for 7 seconds until the

gas conversion

levels shown in table 2.1 for natural
2
level.
2
level.
2
level.
2
level.
2
⇑
Figure 15b
31
symbols
. You are now in 'calibration
levels
2
912.822.1 - GB