Hamworthy F40H Installation, Commissioning And Operating Instructions

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Hamworthy F40H Installation, Commissioning And Operating Instructions Manual pdf 28 page image

HAMWORTHY HEATING LTD22FLEET H series 500001212/F¼ turn latchOn/Off switchFig 7.2.1 - On/Off switch At the end of the ignition proving period, 5seconds, the spark ignition system will beswitched off and the indicator on the control fasciaextinguished. After a period of 15 seconds the fan will alterspeed and the burner modulation will be setaccording to the heat load. If after the 5 second flame proving period theflame signal is below 3μA the boiler will shut downand attempt one restart.NOTE: THE BOILER IS EQUIPPED WITH A RESTARTFACILITY AND WILL ATTEMPT A SECONDIGNITION, DURING WHICH THE ABOVEPROCEDURES WILL BE REPEATED. AT THE ENDOF THE RESTART PROCEDURE, IF NO FLAME ISDETECTED AFTER THE FLAME PROVING PERIOD,THE BOILER WILL LOCKOUT. THE BOILER WILLNOT OPERATE UNTIL THE LOCKOUT HAS BEENMANUALLY RESET.7.4 Ignition Controller Check.1. With the burner firing, the flame signal should be atleast 3μA. Refer to Figure 8.2.9 - Maintenancefunctions. To check for correct operation of the ignitioncontroller, close the gas valve. The boiler shouldshutdown after approximately one second and attempt are-ignition. Check that the flame has been extinguished2. Alternatively, the flame probe lead can be removedfrom 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, witha 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.”1. Remove the flue gas sampling plug from the fluecollector sump, accessible from the front of the boilerand insert the combustion analyser probe in the flue atthe analysis point .2. Ensure that an insertion distance of 50mm is set onthe combustion analyser probe.NOTE: THIS DISTANCE MUST BE SET TO ENSUREACCURATE ANALYSIS OF FLUE GASES.3. Insert probe horizontally into the flue elbow untildepth stop is met.Figure 7.6 - Combustion Analyser Probe Setting(Note: readings taken with front cover removed and 50mm probe insertion CO = < 80 ppm).