Cgg-1K - Wolf CGG-1K-24 Installation And Operating Instructions Manual

3. Checking and adjusting the nozzle pressure
Connect the test equipment:
- The boiler must be switched OFF.
Open the gas shut-off valve.
- Remove the casing cover.
- Undo the plug at test nipple
- (+) Connect the differential pressure tester with a hose at test
nipple .
- (-) Connect the differential pressure tester with a hose at
test port of the combustion chamber casing.
- Start the boiler by turning the heating water temperature
selector to position 8.
- Read off the nozzle pressure Pmin (at minimum boiler output)
within 180 seconds of ignition (soft start phase = minimum
output).
- Turn the heating water temperature selector further to the
emissions test position [chimney sweep].
- Read off the nozzle pressure Pmax (at maximum boiler output)
within the 15 minute test phase.
- Compare the actual values with those in the table.
Gas fired boiler Output
kW

CGG-1K-24

9.4
24.0
CGG-1K-28 10.9
28.0
Table: Nozzles pressures to be maintained
2 8
Conversion to other gas types
.
Thermal load
kW
10.4
26.7
12.0
31.1
Nozzle pressures in mbar (1013 mbar; 15 °C)
Natural gas H
Ws = 14.1 kWh/m³
= 50.7 MJ/m³
Pmin 2.1 ± 0.5
Pmax 12.3 ± 0.5
Pmin 2.1 ± 0.5
Pmax 12.7 ± 0.5
Butane Propane
Ws = 24.3 kWh/m³ Ws = 21.3 kWh/m³
= 87.3 MJ/m³ = 76.8 MJ/kg
4.5 ± 0.5
26.6 ± 0.5 34.4 ± 0.5
4.5 ± 0.5
26.6 ± 0.5 34.5 ± 0.5
3062087_0207
6.0 ± 0.5
6.0 ± 0.5