Cook HMD EN Manuel d'utilisateur télécharger pdf (Page 15)

Attempts to light, with visible spark, but no ame

Troubleshooting

Check the supply gas pressure and compare it with the unit’s nameplate

pressure requirements. Adjust the supply regulator as needed until

the supply gas pressure is within the specied range (see below). The

nameplate is located on the outside of the unit on the control panel side.

With all access panels in place, the fan running and discharging 70ºF

(21ºC) air, connect a U-Tube manometer to the outer sensing probes

(see below) and measure the static pressure across the burner. The

proper static pressure should be (check CFM / Static Pressure chart

on page 8). If needed, evenly adjust the bafes, keeping the burner

centered in the opening until the required pressure is obtained. The

pressure drop was set at the factory and may not need adjustment.

When required pressure is obtained, be sure to reconnect the outer

sensing probes. This process may need to be repeated until the proper

pressure is achieved. This adjustment will change the air quantity

delivered by the unit and therefore the air quantity delivered should be

rechecked. Refer to the Blower Start-Up section.

To increase the static pressure decrease the opening.

To decrease the static pressure increase the opening.

Purge the air.

Is the inlet gas pressure

between the min and

max?

Is there air in the gas

line?

Is the pressure drop

across the burner

correct? (check chart

on page 8)

Is there still not a proper

spark?

Yes

The wires may be switched. Uncross the spark wires.

Make sure the spark gap is .062 in.

Replace spark the plug.

Consult factory

Refer to the control panel parts list when troubleshooting.

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Cook HMD EN Manuel d'utilisateur Page 15