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9.
SERVICE/MAINTENANCE SUGGESTIONS
9.1
Burner fails to start:
1.
Bad fuse or switch open on in-coming power source, or motor overload tripped out.
2.
Control circuit has an open control such as operating, limit or low water cut-off.
3.
Push the reset button on the motor or open the power circuit to the primary safety control.
4.
Loose or faulty wiring. Tighten all terminal screws. Check wiring, against wiring diagram furnished
with burner.
9.2
Burner motor runs, but pilot does not light
1.
Be sure gas is turned on at meter and pilot cock is open.
2.
Place hand on pilot valve to physically confirm it is opening. Check gauge at tee in pilot line for gas
pressure and prompt opening of pilot valve. The typical pilot pressure will be 0.5"w.c. above the
static air pressure.
3.
Check visually or by sound for spark arcing. Verify that electrode is not cracked or shorted.
4.
Refer to section 7.10 on pilot checking procedures.
5.
Check air switch and be sure its circuit closes during start.
6.
Check continuity through "Thermal Cutoff Fuse" located between flame rod and flame rod wire.
7.
Verify the spark gap is correct. Refer to Figure 6.
8.
Check for carbon fiber build-up between electrode tip and pilot body.
9.
Check inlet gas pressure. On burners using a low gas pressure switch the inlet gas pressure must
be at least 6.5" W.C.
9.3
Burner motor runs, pilot lights, but main gas valve does not open
1.
Check flame signal. If signal is low, adjust pilot gas pressure and air settings for improved readings.
2.
Check main gas valve electrical circuit.
3.
Shut-off cock or leak test cocks not open.
4.
Shut-off knob on combination valve not turned "On".
5.
Defective main valve.
9.4
Occasional lockouts for no apparent reason
1.
Re-check micoamp readings. If insufficient, check gas pressure and air damper setting. Check
electrode setting. If flame signal is low, flame rod may have to be re-positioned.
2.
Check ignition cable and electrode porcelain for damage or breaks, which could cause short.
3.
Check for loose or broken wires.
9.5
Burner will not start – even though burner had never failed before or had been running on normal
cycling without failure.
1.
Operating Control circuit open.
2.
Defective control or loose wiring.
3.
Limit circuit open.
9.6
Burner is operating with rough combustion noise.
1.
Excess 0
2
9.7
The burner must be periodically inspected to ensure safety and performance. All maintenance
must be performed with the main electrical power off and the main gas shutoff valve set in its off
position.
1.
Inspect blower inlet screen and clean any buildup of lint.
2.
Inspect blower wheel blades and clean any buildup of dirt.
3.
Inspect ignition electrodes and wiring for any cracks that may cause shorting.
4.
Oil the blower motor at the manufacturer's recommended intervals.
5.
Verify that the pilot electrode is still within specifications (set per drawing in this manual).
6.
Verify the proper operation of the Primary Safety Control, airflow switch, and operating controls.
7.
Check safety shutoff gas valves for gas tightness.
9.8
In the event of extended shutdown, the main power should be turned off and the main manual gas
shutoff valve should be closed. (Off position)
An additional source of information relative to trouble shooting can be found in the Primary Safety Control
Manual supplied with the burner.
is too high. Verify that damper is not open too far.
10
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