Sirius FS
39
GB/IE
1. Compensation line
2. Full load adjustment screw
3. Pressure measurement Point
4. Minimum gas pressure switch
5. Low load adjustment screw
Set CO
2
content at max. output
- Place boiler in to controller stop mode (refer to section 6.3). Operate at
100% load.
- Remove safety cap from adjustment screw (2) for full load.
- Set CO
2
content on the adjustment screw (2) for full load, according to the
performance data (section 3.2)
with a 3mm Allen key. Ensure CO levels do not
exceed 150 ppm.
- Clockwise: CO
2
content is decreased
- anti-clockwise: CO
2
content is increased
- Replace safety cap on the adjusting screw (2)
Set CO
2
content at min. output
- Place boiler in to controller stop mode (refer to section 6.3). Operate at 0%
load.
- Remove safety cap from adjustment screw (5) for low load.
- Set CO
2
content on the adjustment screw (5) for low load, according to the
performance data (section 3.2)
with a TX40 Torx key. Ensure CO levels do not
exceed 150 ppm.
- Clockwise: CO
2
content is increased
- anti-clockwise: CO
2
content is decreased
- Replace safety cap on the adjusting screw (2)
Note: There is a time delay between making an adjustment and the CO
2
value
changing on the gas analyser. Adjust in increments of 1/8 turn at a time and wait
at least 1 minute before making further adjustments. NB 1/2 turn = 1.0% CO
2
6.3 CHECKING AND ADJUSTING CO
2
LEVELS
The gas mixture and burner gas rate is factory set. However, it is an important part of
commissioning to check the gas rate of the boiler and that the combustion emission
levels are correct.
