VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
a.If ignitor sparks and pilot lights, proceed to step 7.
b.If ignitor does not spark, proceed to step "5)" below.
5)Restart power ON sequence by "rapidly" turning the power switch OFF then back ON. A rapid switching is needed to keep the boiler from starting automatic blowdown.
a.Grasp the ignitor terminal and rotate the ignitor approximately 45°.
b.
6)Press the reset switch to start the ignition process.
a.If ignitor sparks and pilot lights, proceed to step 7.
b.If ignitor does not spark, repeat steps "5)" through this step until rod has been rotated 360°.
7.Verify main burner ignition.
A.If main burner lights and remains lit with no intermittent problems, then burner is functioning properly.
B.If main burner does not light or shows intermittent problems, then check the main burner pressure setting as outlined under
"GAS MANIFOLD PRESSURE ADJUSTMENT".
1)If pressure is ok but intermittent burner problems continue, then the following components must be examined.
2)Turn the power switch OFF and allow the boiler to blowdown.
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.
WARNING: SHUT OFF THE GAS BEFORE SERVICING THE UNIT.
3)Remove burner head assembly as outlined under "BURNER HEAD ASSEMBLY" in "REMOVAL AND REPLACEMENT OF PARTS".
4)The complete or intermittent loss of burner ignition or a burner operation that is loud and noisy may indicate the burner tube insulation or heat exchanger casting is damaged.
Verify the burner tube insulation and heat exchanger casting are intact.
NOTE: The suggested method for inspection is to mount a small mirror to a 2 foot long rod and insert the mirror inside the burner tube and use a flashlight to illuminate the area.
NOTE: If necessary, the complete burner tube assembly can be removed to aid in performing the measurement and inspections.
a.Inspect the ceramic insulation for damage at the area around the burner head inside the burner tube.
b.Measure ceramic insulation insertion depth/location from the end of the insulation that surrounds the burner head to the opposite end of the burner tube (end plate mounting flange). The dimension should measure approximately 23 5/8 inches ±1/8. See diagram 5898
"COMPLETE BURNER ASSEMBLY" at the end of this procedure.
c.Verify that casting debris is not clogging the "heat transfer fins" at the end of heat exchanger casting and that the fins have not eroded away.
d.Inspect the interior of heat exchanger casting for signs of water leakage. Also, signs of water leakage into the heat exchanger casting may be determined by examining the bottom area of the flue transition piece and floor.
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| F24700 (October 2001) |
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