2017_E_TYPE-HL.doc Page 49 of 55 24-Oct-2017
turn increases gas flow, while a counter-clockwise turn decreases the gas flow.
• Is the pilot solenoid valve opening? It can usually be heard or felt as it opens.
• Is the pilot pipe opening (orifice) plugged with dirt or corrosion? This is easily checked
visually by loosening a single screw. Be sure to replace it after checking.
Note: The trial for ignition period before lockout is only 4 seconds.
8.8 Pilot Fires But Will Not Stay Lit
• U.V. scanner lens may be dirty. Wipe it clean with a tissue.
• Excessive combustion air supplied is blowing the pilot flame away from the end of the
burner cup. Adjust the air damper.
• Excessive gas pressure. Adjust the pilot regulator
• The scanner is defective. Replace it.
8.9 Pilot Lights But Main Burner Will Not Fire
• Is the firing or test valve open?
• Is the manual eclipse flow valve adjusted?
• Is the burner regulator adjusted properly?
• Is the main gas valve opening? There is a window at the side of the gas valve actuator
that enables the operator to visually verify whether the valve is opening.
If the main gas valve is not opening, check the electrical power to the actuator.
Note: The 120 V electrical power supply to the actuator will be activated only after the
pilot flame has proven.
Caution: A 120 V potential difference is developed between the terminals of the proof of
closure switch located in the actuator housing!
8.10 Process Burner Motor Runs But The Flame Does Not Ignite
• Check the process flame delay timer in the electrical panel.
• Perform the checks listed in Steps 8.6 through 8.9.
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