Frymaster J65X, MJCFEC, J3F Master Jet Cf Series Atmospheric Gas Fryers, Service Procedures, 1-29

MASTER JET CF SERIES ATMOSPHERIC GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

Pilot

Generator

High-Limit	Operating
Thermostat	Thermostat

Optional ON-OFF switch

					High-limit
					Thermostat
					12C
		. A d j			Safety Drain
		P iol t			Switch
Pilot		PS1/2I
		HONEYW E LL		1/2 P.S.I.	17C
Generator
		P ILO T	C
				HONEYWELL
					In Line Splice
HONEYWELL	ON		OFF
1/2 PSI
					ON/OFF Switch
					(Optional)
					17C
					In Line Splice
					FENWALL
					Operating
					Thermostat

When troubleshooting millivolt systems, always check these areas before performing diagnostic checks on either the Robertshaw or Honeywell systems:

A.Inspect all wires and component leads for damage (heat, oil, moisture, etc.). On capillary tube-type thermostats, check for resistance on the thermostat lead wires. Wire nuts and other connectors cannot be present in a millivolt circuit as they can cause resistance. If resistance is found, solder the connectors to the wires or replace the wires.

B.Clean and verify that all wire connections and gas valve terminal connections are tight.

C.Check the length of the pilot flame (it should be about 1½-inches (38mm) long) and verify that it contacts the top one third of the thermopile. Clean the pilot orifice and adjust the pilot strength if needed.

D.Measure thermopile output with no load (i.e., with the thermopile disconnected from the gas valve). Measurements must be made with a multimeter having a 0-1000 DC millivolt (MV) range. Light the pilot and have someone hold the gas cock knob in the depressed position. If the thermopile is a single lead (coaxial) type, measure from the lead’s end contact to its screw-in threads. If the thermopile has two leads, measure across the end terminals. The reading should be within the range of 500-800 millivolts. If not, replace the thermopile.

Performing diagnostic checks on Robertshaw and Honeywell Systems are described on the following page.

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