The EE and EEP Control Systems utilize a Honeywell Q179C Flame Rectification Pilot. Adjust pilot line regulator (5.5” WC in pilot line) so that a medium hard center flame envelops flame rod, see Fig. 66. If flame is yellow, primary air opening may be covered with dirt or lint. This can be removed with a soft brush or by vacuuming.
Fig. 66
PILOT FLAME
HONEYWELL Q179C PILOT
The Thermocouple Control System utilizes a Honeywell Q327A non-primary aerated pilot with a Q309A thermocouple. Adjust pilot line regulator to give a steady flame enveloping 3/8” to 1/2” of the tip of the thermocouple, see Fig. 67.
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 flush 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 qualified 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 float when this type of control is used. Check float for evidence of collapse and check mercury bulb (where applicable) for mercury separation or discoloration.
Do not attempt to repair mechanisms in the field.
Complete replacement mechanisms, including necessary gaskets and installation instructions, are available from the manufacturer.
IMPORTANT
Probe type low water cut-off devices require annual inspection and maintenance. Although these devices are solid state in their operation, the probe is exposed to possible contamination in the boiler water and subject to fouling.
Follow these Probe Low Water Cut-off instructions for complete, step-by-step probe inspection and cleaning instructions.
