Advertisement
C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES
Check for correct spacing between the ignition
electrode and ground for 6000 volt systems—1/8 to
3/16 inch (3.2 to 4.8 mm).
Make sure the leadwires from the flame rod and ignition
electrode are not too close together.
Replace any deteriorated leadwires.
If the problem cannot be eliminated, consider changing
to an ultraviolet flame detection system with a
Q624A1014 solid-state spark generator.
Final Checkout
Before putting the burner into service, check out the
installation by following the Checkout procedures in the
Instructions for the appropriate flame safeguard control. After
completing the checkout, run the burner through at least one
complete cycle to verify operation.
Home and Building Control
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
60-2033—3
60-2033—3
Rev. 11-95
J.A.
Home and Building Control
Honeywell Limited-Honeywell Limitée
740 Ellesmere Road
Scarborough, Ontario
M1P 2V9
Printed in U.S.A.
OPERATION
The C7005B Gas Pilot and Flame Rod Assembly includes an
ignition electrode and a flame rod. The operation of these two
electrodes in a simple electrically-operated, gas pilot
installation is as follows.
At the beginning of the starting cycle, a high voltage from the
secondary winding of the ignition transformer is applied to the
ignition electrode. A spark jumps across the outlet of the pilot
burner. The pilot gas valve is either automatically or manually
opened, and the spark ignites the gas.
When the ignition transformer is energized, ac voltage is
applied to the flame rod through a flame safeguard control.
When the pilot flame appears, this ac voltage is changed to
dc voltage through a rectifying action. This dc voltage then
operates a relay, opening the valve to the main burner (or
permitting it to be manually opened). In the event of flame
failure, flame rectification stops, the gas valves are de-
energized, the valves close, and the system shuts down.
8
Helping You Control Your World
QUALITY IS KEY
Advertisement
