12 Inspection and maintenance
36 Installation and maintenance instructions Energy
7
0020300877_01
12 Inspection and maintenance
12.1 Using original seals
If you replace components, use only the enclosed original
seals; additional sealing materials are not required.
12.2 Observing inspection and maintenance
intervals
▶ Adhere to the minimum inspection and maintenance in-
tervals. The inspection may require maintenance to be
carried out earlier, depending on the results.
– Inspection and maintenance work (→ Appendix)
12.3 Checking the CO₂ content
1. Start up the product with the check programme (P.01)
and set the value.
– Setting value for the programme P.01: 100
Check programmes – Overview (→ Page 44)
2. Wait until the value that is read is stable.
– Waiting period for reading a stable value: 5 min
3. Unscrew the cover from the flue gas analysis point (1).
4. Measure the CO₂ content at the flue gas analysis point
(1).
5. Compare the measured value with the corresponding
value in the table.
Great Britain and Ireland
Removed front casing /
installed front casing
Natural gas
H
9.2 ±1%
◁
The value is OK.
▽ The value is not OK; you cannot start up the
product.
▶ Set the CO₂ content.
12.4 Setting the CO₂ content
Condition: The CO₂ content must be adjusted
▶ Remove the sticker.
▶ Turn the screw (1) to set the CO₂ content (value with
front casing removed).
◁ To increase the CO₂ content: Turn anti-clockwise
◁ To decrease the CO₂ content: Turn clockwise
▶ Only carry out the adjustment in increments of 1/8 turn
and wait approximately 1 minute after each adjustment
until the value stabilises.
▶ Compare the measured value with the corresponding
value in the table.
Great Britain
and Ireland
Removed
front cas-
ing/installed
front casing
Natural gas H
CO₂ at full load 9.2 ±1%
Set for Wobbe in-
dex W₀
14.09 kW⋅h/m³
O₂ at full load 4.5 ±1.8 vol. %
CO at full load ≤ 250 ppm
CO/CO₂ ≤ 0.0027
▽ If the setting is not in the specified adjustment range,
you must not start up the product.
▶ Inform Customer Service.
▶ Check whether the requirements regarding air pollution
control and/or CO have been complied with.
▶ Install the front casing.
12.5 Removing the gas-air mixture unit
Note
The gas-air mixture unit consists of three main
components:
– Fan
– Gas valve assembly
– Burner hood
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