Allmand MAXI HEAT 500IQ Manual - Page 16

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SERIAL NUMBER 14-000001 AND UP

Burner starts to smoke and build black smoke out of exhaust stack:

** Black smoke is an indication the unit is not getting enough air, bad fuel or carbon build up in

the chamber.**

❏ Make sure air setting is on a specified number that the IQ controller

recommends at the time of start up. D O NOT adjust air setting during

operation unless the IQ controller specifies. (Any change of ambient

temperature and elevation requires smaller or higher amounts of air

mixture.)

❏ Check for any debris or material covering or blocking the air damper.

Clean and clear.

❏ Check fuel pressure and maintain 140-145 PSI at the pump.

❏ Ensure fuel nozzle NO 1 & NO 2 are both clean and working correctly.

Check the schematic for a list of wiring for each nozzle. IQ logic controls

both nozzles to maintain temperature.

❏ Make sure the heat exchanger and burn chamber are clear of any soot

build up. If there is a large amount of build up then take the burner apart

and wash with hot water high pressure hose. Let the barrel air dry before

using.

❏ Make sure only NO 1 Diesel fuel is used. Any additives can cause more

gel-like substances which will create fuel issues.

M axi Heat 500IQ