Frymaster 819-5432 Maintenance  Requirement Card Download Page 17

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© 2000 McDonald’s Corporation 

 

819-5432 NOV 05 

All Rights Reserved 

 

      

        Card 15

 

 
High-Limit Check 

(With Thermostat Controller only.) 

 

Note: When the trouble light comes ON, or the temperature exceeds 425°F (218°C), 
release switch. 

Result: Electrical elements or gas burner turns OFF and the second high-limit will come 
ON.  The cooking oil temperature should be between 425° and 450°F (218° and 232°C). 

Caution: When the second high-limit light comes on or the temperature exceeds 450°F 
(232°C), release switch. 

6.

 

Turn the power switch to the “OFF” position.  One vat must remain ON to ensure hood 
fan remains ON. 

7.

 

Remove the fry vat probe and reinstall the computer probe into the vat. 

8.

 

Allow cooking oil to cool for one hour before discarding.  See statement on discarding. 

9.

 

High-limit check is complete.  Repeat procedure for each remaining vat. 

Caution: STATEMENT ON DISCARDING OIL—Hot cooking-oil is dangerous and 
will cause severe skin burns.  Handle with extreme caution.  When discarding old 
cooking oil, the cooking oil should be drained from the fryer into a cooking oil removal 
cart.  The cart should then be taken to a grease barrel and pumped into the grease barrel 
to properly dispose of the old cooking oil. 

 

High-Limit Check 

(With MACC100A, M100A, and M100B Computer only.) 

 

Note: Conduct this test when the fryer will not be needed for about 1 hour, and when the 
cooking oil is due to be changed.  Discard the cooking oil after completing this check. 

Note: The cooking oil must be at a high enough level to cover the high-limit probe. 

Note: Grease filters must be in place and exhaust fans must be on during entire high-
limit control check procedure. 

Note: The high-limit test program allows the operator to test the trip-out temperature of 
the first and second high-limit thermostats.  The first high-limit feature is a function 
performed by the computer and automatically resets when the cooking oil cools below 
its trip point of 400°F (204°C).  The second high-limit automatically resets when the 
cooking oil has cooled to 400°F (204°C) or less.  To perform the high-limit test, the vat 
must be operating normally and the display reading "HI-LIMIT" on either display for a 
full- or split-vat, depending on the test being performed. 

Only one side of a split-vat is 

to be checked at a time.

  The test can be performed any time the vat is turned ON 

except if the vat is in the melt or cooking cycle. 

1.

 

Turn the fry vat ON by pressing the 

 

button (MACC100A and M100A), or the 

 

button (M100B) and allow cooking oil to stabilize at normal cooking temperature.  Wait 

for the 

 

light to go OFF before proceeding. 

 

2.

 

To access the "high-limit test", depress the 

 

and 

 

(left or right) buttons 

simultaneously in the following sequences: 

 
 
 
 
 
 
 
 

3.

 

To start the "first high-limit test", press and hold the 

 

button. The display should read 

"HI-LIMIT". 

 

Full-vat: 

 

and 

 

button 

Split-vat, left: 

 

and Left 

 buttons 

Split-vat, right: 

 

and Right 

 

buttons 

Continued from previous 
page. 

 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
When 

Monthly 
 

Tools 

None. 

 
 
 
 
 
 
 
 
 
 

 

 
 
 
 
 
 
 

15

 

Summary of Contents for 819-5432

Page 1: ...gles to protect against any loose debris 5 Check the inside of the hood to ensure it is clean and free of grease 6 Inspect the inside of the stack with a flashlight Ensure that is clean and free of gr...

Page 2: ...the cooking computer to ON and set it to the product to be cooked in the vat 2 Allow the vat to cycle OFF after reaching the cooking temperature 3 The cooking oil should be at the normal upper oil lev...

Page 3: ...computer display temperature PC 326 327 or NCC 1540 1541 the computer probe should be used 5 Allow the vat to cycle ON and OFF three times 6 After the stabilizing period the instant vat cycles ON for...

Page 4: ...buildup This also meets McDonald s cleanliness standards Not cleaning behind the fryers on a weekly basis could become a fire hazard to your restaurant 1 Turn all fryer power switches to OFF 2 Remove...

Page 5: ...tioner a nylon pot brush and the high low brush scrub all the areas listed in order in Step 12 including the floor 14 Wipe all areas with towels until clean and dry 15 Have manager inspect and approve...

Page 6: ...ut and allow the cooking oil to drain from fry vat Flush out any pieces of fried food and sediment 5 Close the drain valve and very carefully pour McD Heavy duty Degreaser HCS 2 full gallons 8 liters...

Page 7: ...k proportioner If a sink proportioner is not being used mix 6 fluid ounces 3 4 cups 177 ml of McD A P C HCS to 3 gallons 11 liters of warm water and pour solution into fryer vat 19 Using a nylon pot b...

Page 8: ...it vat section into fryer pot without splattering 6 Remove fryer capping piece assembly if so equipped to expose carbon build up 7 Finish filling the vat to the normal shortening level line with a hot...

Page 9: ...here is any carbon left in the vat clean it now with nylon scouring pad then rinse and drain vat 20 Rinse fryer vat thoroughly TWO TIMES with warm 100 F 38 C water and wipe with damp towel Close the f...

Page 10: ...the sink proportioner the use of HOT water will reduce warm up time 8 Press the to turn fryer ON Computer will display low temp 9 Press the gray product button used to store boil out programming 10 T...

Page 11: ...pan or the cooking oil disposal cart Caution Do not splash solution on skin or clothing Bucket and solution will be hot 22 Remove bucket and discard solution into sink drain 23 Place bucket under frye...

Page 12: ...ow the fryer to cycle OFF after reaching the cooking temperature 4 The cooking oil should be at the normal upper oil level line at cooking temperature Add or remove cooking oil as needed Note All cook...

Page 13: ...st turning the computer OFF then turning the computer back ON 15 Repeat Steps 1 through 15 for each additional fryer until all have been checked Recovery time check is complete Recovery Check Time Wit...

Page 14: ...yers recovery time is acceptable If the time displayed is greater than the required time refer to the scratch calibration procedure on this card or the Fryer section of the Equipment Manual for Troubl...

Page 15: ...s absolutely necessary but with extreme care The computer must be replaced immediately after this period of necessity If the second high limit does not work the vat must NOT be used until the second h...

Page 16: ...oil after completing this check Note Only one side of a split vat is to be checked at a time Caution Grease filters must be in place and exhaust fans must be ON during entire high limit control check...

Page 17: ...due to be changed Discard the cooking oil after completing this check Note The cooking oil must be at a high enough level to cover the high limit probe Note Grease filters must be in place and exhaus...

Page 18: ...limit thermostat immediately 5 High limit control check is complete 6 Repeat the same procedure for other vats Caution If after completing both high limit tests you find only the second high limit op...

Page 19: ...ture until the mechanical high limit opens approximately 425 F 218 C The right display will then show Hi 2 10 Failure of high limit test 2 is indicated by an alternating display of hi 2 and bad Call f...

Page 20: ...d 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 BURN...

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