Honeywell Q348B user manual

Device: Honeywell Q348B

Category: Burner

Manufacturer: Honeywell

Size: 0.2 MB

Added : 1/10/2014

Number of pages: 4

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Summaries

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Abstracts of contents

Summary of the content on the page No. 1

Q345A, Q348A, Q348B, Q362A,Q373A
and Q381A Pilot Burner/Igniter-Sensors
Application
Fig. 1—Mount pilot burner/igniter-sensor on
main burner.
These pilot burner/igniter-sensors provide pilot flame
ignition and sensing in intermittent pilot systems. They
consist of a target type pilot burner with a combination
spark igniter and flame sensor mounted in place of the
thermocouple.
PILOT BURNER/IGNITER-SENSOR
MUST BE RIGIDLY POSITIONED
Installation M3271
RELATIVE TO MAIN BURNER
WHEN INSTALLING THI

Summary of the content on the page No. 2

CONNECT PILOT GAS TUBING 2. Connect one end of the ignition cable to stud 1. Cut tubing to desired length and bend as necessary terminal on igniter-sensor using 1/4 in. [6 mm] diam- eter snap-spring or cage-clips on cable ends. for routing to pilot burner/igniter-sensor. Do not make 3. Connect the other end of the ignition cable to the sharp bends or deform tubing. Do not bend tubing at control after compression nut has been tightened igniter terminal on ignition module. because this can result

Summary of the content on the page No. 3

Fig. 5—Igniter-sensor tip must be in pilot flame. Fig. 6—Proper shielding of pilot flame. 3/8 TO 1/2 INCH [10 TO 13 mm] PROPER FLAME ADJUSTMENT IGNITER-SENSOR Q373A PROPER FLAME 3/8 TO 1/2 INCH ADJUSTMENT [10 TO 13 mm] TYPICAL M1273 SHIELD IGNITER-SENSOR Set the thermostat to call for heat. Q345A, Q348A-B, Q362A AND Q 381A M3777 Watch the pilot burner during the ignition sequence. See if: • Ignition spark continues after the pilot is lit. • The pilot lights and the spark stops, but main

Summary of the content on the page No. 4

Fig. 7—Example of unsatisfactory pilot flames. CAUSE APPEARANCE APPEARANCE SMALL BLUE FLAME SMALL BLUE FLAME CHECK FOR LACK OF GAS FROM: • CLOGGED ORIFICE FILTER • CLOGGED PILOT FILTER • LOW GAS SUPPLY PRESSURE • PILOT ADJUSTMENT AT MINIMUM LAZY YELLOW FLAME LAZY YELLOW FLAME CHECK FOR LACK OF AIR FROM: • DIRTY ORIFICE • DIRTY LINT SCREEN, IF USED • DIRTY PRIMARY AIR OPENING, IF THERE IS ONE • PILOT ADJUSTMENT AT MINIMUM WAVING BLUE FLAME WAVING BLUE FLAME CHECK FOR: • EXCESSIVE DRAFT AT PILO

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