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Gas Pilot and Flame Rod Assemblies
GENERAL
The C7005A,B Gas Pilot Burner Assemblies include a flame
rod to prove the pilot flame. The assemblies are used with a
suitable flame safeguard control on industrial or commercial
gas burners or oil burners with gas pilots.
Copyright © 1995 Honeywell Inc. • All Rights Reserved
FEATURES
• Used with Honeywell controls using the flame
rectification principle.
• C7005A is for continuous pilot applications. It includes
an insulated flame rod, properly positioned relative to
the flame retention type nozzle.
• C7005B is similar to C7005A, but includes an ignition
electrode suitable for automatic, electric-spark
ignition, gas pilot applications.
• Individually mounted flame rod and ignition electrode
in ceramic insulators allow the head assembly to fit
inside a 3-inch pipe.
• Stainless steel fins on the flame retention type pilot
head provide the correct ratio of flame rod area to
ground area for maximum flame signal, and are
beneficial in stabilizing the pilot flame.
• Pilot flame retention nozzle and mixing tube are
threaded internally, 1/2-14 NPT and 3/8-18 NPT,
respectively, and can be assembled with standard pipe
fittings.
• Pilot can be installed in vertical, horizontal, or inclined
position.
• Rajah connectors facilitate electrical connections.
General ............................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Ordering Information ........................................................... 2
Installation ........................................................................... 3
Adjustments and Checkout ................................................. 5
Operation ............................................................................ 8
C7005A,B
PRODUCT DATA
Contents
60-2033-3
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Summary of Contents for Honeywell C7005A
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Page 1: Table Of Contents
• C7005A is for continuous pilot applications. It includes an insulated flame rod, properly positioned relative to the flame retention type nozzle. • C7005B is similar to C7005A, but includes an ignition electrode suitable for automatic, electric-spark ignition, gas pilot applications. -
Page 2: Specifications
Honeywell Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 (612) 951-1000 In Canada—Honeywell Limited/Honeywell Limitee, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9 International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. -
Page 3: Installation
C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES • Ignition Transformer, 6000 volts secondary (C7005B only): Install the pilot so the pilot flame has full contact with the gas — Part no. 22042; 120V, 60 Hz primary. stream from the main burner heads, jets or nozzles (Fig. 3, —... - Page 4 C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES NOTE: THE FLAME ROD SHOULD BE LOCATED ON EITHER SIDE OR BELOW THE PILOT. M3038 Fig. 2. Improper position of flame rod. M3036 Fig. 4. Typical mounting of gas pilot and flame rod assembly on multiple head gas burner.
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Page 5: Adjustments And Checkout
C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES All wiring must comply with applicable electrical codes, FLAME ordinances, and regulations. Use NEC Class 1 (Line SAFEGUARD Voltage) wiring. CONTROL FLAME For normal installations: For the ignition electrode, use high tension wire •... - Page 6 Meter (see Fig. 7) or its equivalent for measuring the flame signal in microamperes. The flame signal (current) is measured by the following procedure: Use a Honeywell W136A Test Meter. (If a W136A is not available, a microammeter with a 0 to 25 microamp dc range can be used.)
- Page 7 C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES Table 1. Flame Signal For C7005A,B. Minimum Maximum Minimum Maximum Flame Acceptable Expected Acceptable Expected Signal Flame Safeguard Steady Current Current Steady voltage Steady voltage Amplifier Control (uA) (uA) (Vdc) (Vdc) R7247A BC7000L; R4140G,L,M; R4138C,D;...
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Page 8: Operation
C7005A,B GAS PILOT AND FLAME ROD ASSEMBLIES Check for correct spacing between the ignition OPERATION electrode and ground for 6000 volt systems—1/8 to 3/16 inch (3.2 to 4.8 mm). The C7005B Gas Pilot and Flame Rod Assembly includes an Make sure the leadwires from the flame rod and ignition ignition electrode and a flame rod.