Frymaster 819-5432 Scratch Calibration Check, Continued from previous page, manual

Continued from previous page.

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© 2000 McDonald’s Corporation All Rights Reserved

Scratch Calibration Check

2.	Remove gas valve vent tube. Clean and replace. See cleaning procedure in service
	manual.
3.	Clean combustion air blower. See the service manual for cleaning procedure.	15
4.	Conduct recovery test as outlined on this card. The recovery test procedure varies
	dependent upon the controller/computer model of your fryer.
5.	If the vat does not meet the recovery specification, adjust the combustion air blower to
	obtain the proper recovery time.
	COMBUSTION AIR BLOWER ADJUSTMENT
	Note: Use a multimeter that measures DC microamps when making burner air
	adjustments.
	Note: Ensure proper gas pressure is set out of the gas regulator.
6.	Connect the multimeter in series with the white flame sensor wire on the ignitor.
7.	After fryer has completed the melt cycle, allow burner to operate for at least one minute.
8.	Check for a 2.5 to 3.5 microamp reading on the multimeter. This reading should show at
	least 2.5 microamps. Adjust the combustion air-blower intake plate to obtain a
	maximum microamp reading on the multimeter.
	Note: Air adjustment must be made if a blue flame is observed through the burner
	viewing ports, or if there are dark spots on the burner face. After 90 seconds of
	continuous burner operation, the burner should glow bright orange-red. (For proper
	colors, see the "BURNER COLOR COMPARISON CHART" located inside the door of
	the fryer). If flame color is not correct, it is necessary to adjust the combustion air-
	blower air intake-plate.
9.	To adjust the blower intake plate, loosen the locking nut(s) on the intake plate with a small
	adjustable wrench.
10.	Adjust the plate opened or closed to obtain a maximum reading on the multimeter. When
	observing the burner through the viewing ports, an orange-red glow should be seen on the
	face of the burner. The ports are located directly above the spark ignitors.
11.	When a maximum microamp reading and an orange-red glow have been obtained, tighten the
	intake plate locking nut(s) while holding the plate to prevent movement.
	Note: A blue flame observed through the burner viewing ports usually indicates
	insufficient air. Dark spots on the burner face indicate excess air.
12.	Recheck the recovery time as outlined on this card.
13.	If further combustion air adjustments are needed, repeat Steps 9 through 12 until the
	recovery time specification is met.
14.	Repeat Steps 9 through 13 for each vat of the fryer.
15.	Scratch calibration check is complete. Check remaining fryers.

819-5432 NOV 05 Card 15