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INTELLI-VENT TROUBLESHOOTING GUIDE

18 of 24

BURNER CHECK LIST

REMOVE BURNER TO PERFORM THE FOLLOWING TESTS

1 Burner mounting screws. Check the two mounting screws that hold the burner head to

the main burner tube. These screws being loose can cause poor burner grounding and

diminished or lost flame sensing current which leads to burner short cycling and

lockout.?

2 Ignitor assembly plug connection. Check the 5 pin Molex plug and the female receptacle

in the control body to insure all conductors are present and making good contact. Wiggle

both Molex plugs at the control body to check for poor connections if the Intelli-Vent

control is not responding for any reason.

3 Ignitor assembly wires. Check the three wires between the ignitor assembly and the

Intelli-Vent control. Insure these wires are not cut or damaged. Replace the Ignitor

assembly if the wiring is damaged.

4 Ignitor assembly ceramic insulators. Make a close visual inspection of the ignitor

assembly insulators. Insure the two ceramic insulators for the ignitor and flame sensor

are not chipped or cracked. Replace the ignitor assembly if these insulators are

damaged or defective.

5 Ignitor resistance test. Check the ignitor resistance with an ohm meter set on a low scale.

Ignitor resistance should be between 11.5 and 18.8 ohms. If the resistance of the ignitor

is not within this range, replace the ignitor. Worn or damaged ignitors can cause ignition

failure and control lockout after three failed ignition attempts.

6 Flame sensor condition. Insure the flame sensor is free of rust and corrosion; clean the

sensor with steel wool. Sand cloth can be used; be sure to clean off any residue left by

the sand cloth. Rust or corrosion on a flame sensor will cause diminished or lost flame

sensing current which leads to burner short cycling and control lockout after three failed

ignition attempts.

7 Flame sensor (ignitor) alignment.?Insure the flame sensor is aligned with the burner

according to the specifications on the previous page of this bulletin. A misaligned flame

sensor can lead to diminished or lost flame sensing current which causes burner short

cycling and control lockout after three failed ignition attempts. If the flame sensor is

aligned properly the ignitor should be positioned correctly also since both are fixed to a

common assembly.

8 Low NOx screen – clearance. On low NOx models, insure the low NOx screen is not

touching either the ignitor or the flame sensor when installed inside the combustion

chamber. This screen touching the flame sensor could cause a false flame sensing

signal and control lockout.

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Rheem GTC Series Guía para resolver problemas Pagina 21