Burner adjustment and matching
matching the burner to the gas type
At the factory, the burner is preset to the
stated gas type (see adjustment label on the
fan casing of the burner).
The burner adjustment and the matching of the
burner to a different gas type requires the
availability of a flue gas analyser and a
pressure meter to measure the gas pressure.
The burner adjustment is checked and
matched in accordance with the
following steps:
1) Open the screw at the “gas inlet
pressure” test port (pos 9) 1/2 a turn
anti-clockwise and push on the test hose
of the pressure tester
2) Open the gas tap.
3) Check the gas inlet static pressure and
compare it with the set value
in Tab. 5.1.3 (Fig. 6).
4) Open the heating valves.
5) Start the GSU/GCU at the mains isolator.
6) Start the emissions test function to ramp
up to full load (see chapter 8).
Note:
Carry out a new standard
burner adjustment, if the burner
fails to start, even though the
power and gas supply are OK and the flue
path is unrestricted:
- Turn the mixture adjusting screw
(pos. 11) clockwise up to its end stop
(do not tighten!).
- The open the adjusting screw seven
turns anti-clockwise and try the start
the system again.
- Open the mixture adjusting screw
a further three turns, if the burner fails
to start and try another start.
7) Connect the flue gas analyser.
8) The gas inlet supply pressure must not
drop substantially below the static
pressure less the pressure drop in the gas
supply hose according to Fig. 5.1.9. The
burner output falls if the gas supply
pressure is too low. If necessary, check
the gas installation.
[ 38 ]
Summary of Contents for GasCompactUnit Series
Page 17: ... 17 Fig 3 4 3 Flue gas system sets ...
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