Combustion Checks - Hamworthy F175V Installation, Commissioning And Operating Instructions

NOTE: THE BOILER IS EQUIPPED WITH A RESTART
FACILITY AND WILL
IGNITION, DURING
PROCEDURES WILL BE REPEATED. AT THE END
OF THE RESTART PROCEDURE, IF NO FLAME IS
DETECTED AFTER THE FLAME PROVING PERIOD,
THE BOILER WILL LOCKOUT. THE BOILER WILL
NOT OPERATE UNTIL THE LOCKOUT HAS BEEN
MANUALLY RESET.
7.4 Ignition Controller Check.
1. With the burner firing, the flame signal should be at
least 3µA. Refer to Figure 8.2.9 - Maintenance
functions. To check for correct operation of the ignition
controller, close the gas valve. The boiler should
shutdown after approximately one second and attempt a
re-ignition. Check that the flame has been extinguished
2. Alternatively, the flame probe lead can be removed
from the end of the flame probe, with the same result.
7.5 Gas Supply Pressure Check.
1. When the boiler modules have been checked for correct operation the gas supply pressure should be checked.
This should be done with all modules firing.
•
For Natural Gas, a nominal gas inlet pressure of 20mbar measured at the rear of the boiler is required, with
a maximum inlet pressure of 25mbar.

7.6 Combustion Checks

"The boiler modules are factory pre-set, but, site checks must be done to confirm correct performance."
Figure 7.6 - Combustion Analyser Probe Setting
(Note: readings taken with front cover removed and 50mm probe insertion CO = < 80 ppm).
HAMWORTHY HEATING LTD
ATTEMPT A SECOND
WHICH THE ABOVE
FLEET V series
On/Off switch
Fig 7.2.1 - On/Off switch
1. Remove the flue gas sampling plug from the flue
collector sump, accessible from the front of the boiler
and insert the combustion analyser probe in the flue at
the analysis point .
2. Ensure that an insertion distance of 50mm is set on
the combustion analyser probe.
NOTE: THIS DISTANCE MUST BE SET TO ENSURE
ACCURATE ANALYSIS OF FLUE GASES.
3. Insert probe horizontally into the flue collector sump
until depth stop is met.
18
¼ turn latch
500001217/D