46 Installation and maintenance instructions 0020308118_05
23. Hinge the electronics box upwards.
24. Check the noted measured value against the manufac-
turer details.
Permissible gas flow pressure
Great
Britain
Natural gas H
1.3 to 2.3 kPa
(13.0 to
23.0 mbar)
Liquid gas P
2.3 to 4.3 kPa
(23.0 to
43.0 mbar)
Result 1:
Gas connection pressure/gas flow pressure in the per-
missible range
The product is ready to use.
▶ Install the front casing. (→ Section 7.11)
▶ Record the appliance gas inlet working pressure
(kPa resp. mbar) in the Benchmark gas boiler com-
missioning checklist.
Result 2:
Gas connection pressure/gas flow pressure not in the
permissible range
Caution.
Risk of material damage and oper-
ating faults caused by incorrect gas
connection pressure/gas flow pres-
sure.
If the gas connection pressure/gas flow
pressure lies outside the permissible
range, this can cause operating faults in
and damage to the product.
▶ Do not make any adjustments to the
product.
▶ Do not start up the product.
▶ If you are unable to eliminate the fault, contact the
gas supply company.
▶ Temporarily decommission the product.
(→ Section 14.2)
▶ Install the front casing. (→ Section 7.11)
▶ Close the gas stopcock.
▶ Disconnect the product from the power grid.
▶ You must not start up the boiler.
9.13.4 Checking the O₂ content
Note
Carry out the measurements only when the front
casing is installed.
Note
During a combustion analysis it is no longer a
requirement to check the CO₂ value as the CO₂
value is not required for the correct verification
of combustion. A standard-compliant check is
carried out via the O₂ value according BS 7967.
The O₂ value directly reflects the oxygen supply
required for complete combustion. It is still re-
quirement to record all combustion parameters
within the benchmark document.
1. Open the test opening at the flue gas analysis point.
2. Position the measuring probe for the flue gas analyser.
3. Start chimney sweep mode (→ Section 8.9).
4. Ensure that the heat load is correct.
– Max. DHW heat input (standard selection)
– Adjustable heat load (for some installations, this
deviates from the standard selection)
5. Wait until the product has completed the calibration via
S.093 and the status changes to S.004, S.014 oder
S.024.
6. Record the core current of the flue gas and wait until
the measured value has stabilised. Log the measured
value reading.
7. Compare the measured value reading with the per-
missible ranges from the diagrams.
Validity: VU 10CS/1-5 (N-GB) ecoTEC plus 610 OR VU 15CS/1-5 (N-
GB) ecoTEC plus 615 OR VU 20CS/1-5 (N-GB) ecoTEC plus 620 OR
VUW 20/26CS/1-5 (N-GB) ecoTEC plus 826
4
5
6
7
8
9
3
2
1
0
10
16462 1214 202224262830810 18
B
A
1
4
2
3
A O₂ content [vol%]
1 Max. O₂ content,
liquefied petroleum
gas
2 Max. O₂ content,
natural gas
B Heat input [kW]
3 Min. O₂ content,
liquefied petroleum
gas
4 Min. O₂ content,
natural gas
Validity: VU 25CS/1-5 (N-GB) ecoTEC plus 625 OR VU 30CS/1-5 (N-GB)
ecoTEC plus 630 OR VUW 25/32CS/1-5 (N-GB) ecoTEC plus 832 OR
VUW 30/36CS/1-5 (N-GB) ecoTEC plus 836
155 10 2025303540
B
2
4
6
8
10
0
A
2
1
2
4
3
A O₂ content [vol%]
1 Max. O₂ content,
liquefied petroleum
gas
2 Max. O₂ content,
natural gas
B Heat input [kW]
3 Min. O₂ content,
liquefied petroleum
gas
4 Min. O₂ content,
natural gas
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