Thermostats; Accessing Fryers For Servicing - Frymaster FootPrint OCF30G 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 or Right vat High-Limit
24VAC Power to Left High-Limit (if present)
Probe Resistance (Full or Right Vat) *
Probe Resistance (Left - if present) *
Probe Isolation
High-Limit Continuity (Full or Right Vat)
High-Limit Continuity (Left - if present)
* Disconnect 15-pin harness from controller before testing probe circuit.
** See Probe Resistance Chart on page 1-28.
*** 5 mega-Ohms or greater.
1.4

Thermostats

OCF30™ 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 controller monitors the probe resistance
and controls burner firing when the resistance exceeds or falls below programmed temperatures (setpoints).
OCF30™ 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 OCF30™ Series Gas Fryer Installation and
Operation Manual (P/N 819-6687) 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
50VAC Scale 9 on J1 and GROUND
R x 1000 OHMS 2 and 6 on J3 or 13 and 14 on J2
R x 1000 OHMS 2 and 6 on J1 or 14 and 15 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
R x 1 OHM 9 on J1 and Wire 12C on Gas Valve
DANGER
1-4
PINS RESULTS
110-125
110-125
12-18
22-28
22-28
22-28
**
**
***
0
0