Burnham K50 Boiler User Manual


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FIG. 66
PILOT FLAME
HONEYWELL Q179C PILOT
FIG. 67
PILOT FLAME
HONEYWELL Q327A PILOT W/THERMOCOUPLE
7. LOW WATER CUT-OFF
–
a. Float Type Low Water Cut-off
Duringtheheatingseason,ifanexternallowwater
cut-off is on the boiler, the blow off valve should
be opened once a month (use greater frequency
where
conditionswarrant),toushoutthesediment
chamber so the device will be free to function
properly.
Low-water fuel cut-offs and water feeders should
bedismantledannuallybyqualiedpersonnel,
totheextentnecessarytoinsurefreedomfrom
obstructions and proper functioning of the
working parts. Inspect connecting lines to boiler
for accumulation of mud, scale, etc. and clean as
required.
Examineallvisiblewiringforbrittleor
warn insulation and make sure electrical contacts
are clean and that they function properly. Give
special
attentiontosolderjointsonbellowsandoat
whenthistypeofcontrolisused.Checkoatfor
evidence of collapse and check mercury bulb (where
applicable) for mercury separation or discoloration.
Do not attempt to repair mechanisms in the eld.
Complete replacement mechanisms, including
necessary gaskets and installation instructions, are
available from the manufacturer.
IMPORTANT




instructions.
The EE and EEP Control Systems utilize a Honeywell
Q179CFlameRecticationPilot.Adjustpilotline
regulator (5.5” WC in pilot line) so that a medium hard
center
ameenvelopsamerod,seeFig.66.Ifame
is yellow, primary air opening may be covered with dirt
or lint. This can be removed with a soft brush or by
vacuuming.
The Thermocouple Control System utilizes a
Honeywell Q327A non-primary aerated pilot with a
Q309A
thermocouple.Adjustpilotlineregulatorto
giveasteadyameenveloping3/8”to1/2”ofthetipof
thethermocouple,seeFig.67.
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