User guide

70
FIG. 61
PILOT FLAME
HONEYWELL Q179D PILOT W/THERMOCOUPLE
SECTION V – SERVICE (continued)
FIG. 62
PILOT FLAME
HONEYWELL Q179C PILOT
FIG. 63
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.
regulator 5.5” WC in pilot line so that a medium hard
centerameenvelopsamerod,seeFig.61.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 EP 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.62.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.63.