0020313973_01 Compact Installation and maintenance instructions 35
12 Inspection and maintenance
▶ Adhere to the minimum inspection and maintenance in-
tervals.
▶ Carry out maintenance work on the product at an earlier
point if the results of the inspection that was carried out
during previous maintenance make this necessary.
12.1 Complete Service Interval Record section
▶ After servicing, complete the relevant Service Interval
Record section of the Benchmark Checklist located on
the inside back pages of this document.
12.2 Checking and setting the CO₂ content
Note
Only a qualified competent person is authorised
to implement the CO₂ setting on the gas valve
assembly.
Each destroyed tamper-proof seal must be re-
placed with a new tamper-proof seal. The CO₂ ad-
justing screw must be sealed.
Never modify the factory setting of the gas pres-
sure regulator of the gas valve assembly.
1. Check the CO₂ content. (→ Page 31)
▽ If the value is not correct, set the CO₂ content.
2. Remove the sticker.
3. Remove the covering cap (1).
4. Turn the screw (2) 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
Note
For natural gas only: Only perform the ad-
justment in small increments of a 1/8 turn
and wait approx. one minute after each ad-
justment until the value stabilises.
For liquefied petroleum gas only: Only per-
form the adjustment in extremely small in-
crements (approx. 1/16 turn), and wait ap-
prox. one minute after each adjustment until
the value stabilises.
5. Compare the measured value with the corresponding
value in the table.
Setting the CO₂ con-
tent
Removed
front casing
Fitted front
casing
Natural gas H Natural gas H
CO₂ at full load 9.0 ±0.3 vol. % 9.2 ±0.3 vol. %
Set for Wobbe index
W₀
14.09 kW⋅h/m³ 14.09 kW⋅h/m³
O₂ at full load 4.9 ±0.5 vol. % 4.5 ±0.5 vol. %
CO at full load ≤ 250 ppm ≤ 250 ppm
CO/CO₂ ≤ 0.0027 ≤ 0.0027
Setting the CO₂ con-
tent
Removed
front casing
Fitted front
casing
Liquefied pet-
roleum gas P
Liquefied pet-
roleum gas P
CO₂ at full load 10.4 ±0.3 vol.
%
10.6 ±0.3 vol.
%
Set for Wobbe index
W₀
21.34 kW⋅h/m³ 21.34 kW⋅h/m³
O₂ at full load 5.4 ±0.4 vol. % 5.1 ±0.4 vol. %
CO at full load ≤ 250 ppm ≤ 250 ppm
CO/CO₂ ≤ 0.0024 ≤ 0.0024
▽ If the setting is not in the specified adjustment
range, do not start up the product.
▶ Contact customer service.
6. Check whether the air-quality requirements with regard
to carbon monoxide are fulfilled.
7. Refit the covering cap (1).
8. Install the front casing.
12.3 Moving the expansion
vessel to the maintenance position on
the combustion block
▶ Depending on the components on which you want to
work, move the expansion vessel to the maintenance
position.
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