Replacing Frypot Insulation And/Or Upper Burner Rails - Frymaster BIGLA30 Series Service Manual

9. Remove the two mounting screws on each side of the component box and rotate the top of the box out of
the frame. Carefully pull it out enough to disconnect the wiring harness connector from the back of the
box. Cut any ties that prevent the box from being pulled out of the control panel frame.
10. Carefully pull the box clear of the frame and rest it on top of the fryer.
11. Using a pin pusher, remove the temperature probe, high-limit thermostat wires and RTD probe wires from
the plugs or terminals, marking each wire to facilitate re-assembly.
12. Disconnect the actuators from the return and drain valves.
13. Remove the section(s) of drain from the drain valve(s) of the frypot to be removed.
14. Disconnect the gas lines from the burner orifices and ignitor assemblies.
15.
Remove the frypot hold down bracket
16. Remove the screws in the back panel and inside the flue cap at each end that secure the flue cap to the fryer
and lift it clear of the fryer.
17. Disconnect the oil return line(s) from the frypot to be removed.
18. Disconnect all wiring from the AIF board.
19. Carefully lift the frypot from the fryer cabinet.
20. Remove the drain valve(s), temperature probe(s), high-limit thermostat(s), RTD probes, oil level sensor
probes, AIF boards, actuators and ignitor assemblies. Inspect each of these components carefully and
install them in the replacement frypot if they are in serviceable condition. Use Loctite
or equivalent on component threads.
NOTE: Some servicers, based upon their experience, recommend that probes and thermostats be replaced
whenever a frypot is replaced; however, this remains the customer's decision.
21. Reverse steps 1-20 to reassemble fryer.
NOTE: Care should be taken not to over-torque nuts on frypots made of 400-series stainless steel, as this
could tear the material. One turn past hand-tight is sufficient torque.
22. Perform steps 14 through 18 of Section 1.9.9 to ensure that there are no leaks in the burner insulation.
Before installing temperature probes, high-limit thermostats, RTD probes, oil level
sensor probes, return valves and drain valves on replacement frypot, clean the
threads and apply Loctite

1.9.12 Replacing Frypot Insulation and/or Upper Burner Rails

NOTE: Replacing the burner rails requires completely tearing down the frypot and installing new frypot
insulation. Refer to the frypot exploded view below for component identification.
1. Remove the frypot per Section 1.9.11.
2. Remove the burner assemblies (1).
3. Remove insulation retainers and blanket insulation (2).
4. Remove the upper oil zone insulation bracket and upper oil zone insulation (3).
5. Remove the plenum (4).
6. Remove the front lower combustion chamber insulation retainer and insulation (5), and the front lower
combustion chamber inner insulation retainer and insulation (6). NOTE: Full-vat units have two-piece
insulation retainer and insulation components. Dual-vat units have one-piece components.
7. Remove the upper combustion chamber insulation retainer and insulation (7).
8. Remove the inner upper combustion chamber insulation retainer and insulation (8).
9. Remove the rear lower combustion chamber retainers, back, and insulation (9). NOTE: Full-vat units have
two-piece backs and four retainers. Dual-vat units have one-piece backs and two retainers.
10. Remove the flue assembly (10).
.
CAUTION
®
PST56765 thread sealant or equivalent.
1-14
®
PST56765 sealant