Checking and setting at part load
1. Measure the percentage of O
2
in the flue gases.
2. Compare the measured value with the checking values in the table.
Caution
The O
2
values at part load must be higher than the O
2
values at
full load.
3. If the measured value is outside of the values given in the table,
correct the gas/air ratio.
4. Using adjusting screw B, adjust the percentage of O
2
for the gas type
being used to the nominal value. This should always be inside the
highest and lowest setting limit.
5. Set the boiler back to the normal operating status.
Checking/setting values for O
2
at part load
Tab.51 Checking/setting values for O
2
at part load for G20 (H gas)
Values at part load for G20 (H gas)
O
2
(%)
(1)
AMC 15
5.9
(1)
- 6.3
AMC 25
5.9
(1)
- 6.3
AMC 25/28 MI
5.9
(1)
- 6.3
AMC 35
5.5
(1)
- 5.9
(1) Nominal value
Tab.52 Checking/setting values for O
2
at part load for G30/G31 (butane/
propane)
Values at part load for G30/G31 (butane/propane)
O
2
(%)
(1)
AMC 15
5.8
(1)
- 6.1
AMC 25
5.8
(1)
- 6.1
AMC 25/28 MI
5.8
(1)
- 6.1
AMC 35
5.8
(1)
- 6.1
(1) Nominal value
Fig.73 Position of adjusting screw B
7 Commissioning
74 AMC 7686707 - v.01 - 06092018