Thermostats; Accessing Fryers For Servicing - Frymaster FOOTPRINT 8196345 Service & Parts Manual

FREQUENTLY USED TEST POINTS FOR INTERFACE BOARD 106-6706
Test
12VAC Power to Controller
24VAC Power to Right Module
120 VAC Power
120 VAC Power to Blowers
24VAC Power to Full Vat High-Limit
Probe Resistance (Full Vat) *
Probe Isolation
High-Limit Continuity (Full Vat)
** Disconnect 20-pin harness from controller before testing probe circuit.
** See Probe Resistance Chart at end of chapter.
*** 5 mega-Ohms or greater.
1.4

Thermostats

®
Protector series gas fryers have temperature probes located on the front centerline of each frypot. In
this type of thermostat, the probe resistance varies directly with the temperature. That is, as the
temperature rises, so does resistance, at a rate of approximately 2 ohms for every 1º F. Circuitry in
the computer monitors the probe resistance and controls burner firing when the resistance exceeds or
falls below programmed temperatures (setpoints).
®
Protector series gas fryers are also equipped with a high-limit thermostat. In the event that the fryer
fails to properly control the oil temperature, the high-limit thermostat prevents the fryer from
overheating to the flash point. The high-limit thermostat acts as a normally closed power switch that
opens when exposed to temperatures above 425ºF to 450ºF (218ºC to 232ºC). The different types of
thermostats have different part numbers for CE and Non-CE models, and are not interchangeable.
1.5

Accessing Fryers for Servicing

Moving a fryer filled with oil may cause spilling or splattering of the hot liquid. Follow
the draining instructions in Chapter 5 of the Protector
and Operation Manual (P/N 819-6339) before attempting to relocate a fryer for
servicing.
1. Shut off the gas supply to the unit. Unplug the power cords. Disconnect the unit from the gas
supply.
2. Remove any attached restraining devices and relocate the fryer for service accessibility.
3. After servicing is complete, reconnect the unit to the gas supply, reattach restraining devices, and
plug in the electrical cords.
Meter
Setting
50VAC Scale 1 and 3 on J3 or J2
50VAC Scale 8 on J3 and GROUND
250VAC Scale 11 on J3 and GROUND
250VAC Scale 12 on J3 and GROUND
50VAC Scale 9 on J3 and GROUND
R x 1000 OHMS 2 and 6 on J3 or 13 and 14 on J2
R x 1000 OHMS 6 on J1 or J3 and GROUND
R x 1 OHM 9 on J3 and Wire 13C on Gas Valve
DANGER
®
1-4
Pins
Series Gas Fryer Installation
Results
12-18
22-28
110-125
110-125
22-28
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