How does the thermastate and thermo coupler gets wired to the gas valve on a Tri Star Deep Fryer TSF 40 50

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Hi there. Visit www.starwebconnect.com/Manuals.aspx then click the fryer tab wherein yo will find the wiring diagram you need.
Regards.

Check if there is 500 to 750 millivolts across the thermopile wires; thermopile generates 500 to 750 millivolts if properly heated to energize pilot and main valve solenoids of the gas valve for pilot and main burner operation. If the voltage across the thermopile is good and all wiring connections are ok, I think you have to replace the gas valve.
Regards.

possible thermo couple problem not letting the gas valve open its the little tube that the pilot flame burns to

HEY, MY NAME IS KEVIN AND IM IN THE RESTAURANT BUSINESS AS WELL. IVE HAD THAT SAME PROBLEM,THE FIX IS TO REPLACE THE THERMO COUPLER. PART COST ABOUT 40.00 - 50.00 BUCKS DEPENDING WHERE U FIND IT. ANY QUESTIONS UFEEL FREE TO EMAIL ME. [email protected]

With the thermostat on the burners are still getting gas. that's normal. If it lights with the thermostat off you do have a severe problem. (bad gas valve/Tstat). The pilot does occasionaly go out on all no electronic ignition items is normal. Follow the remommended steps for relighting and if it lights fine your ok.

Sounds like you need a new thermo coupler. this is first and foremost.

Can you light the burners by hand? and do they burn hot and clean that will let you know if you have clear intake lines for the gas.

There is a small chance the gas valve is having a problem,not at the burner control but the vavle the thermo coupler is connected to. or worse case scenario moisture in the gas line.

My suggestions,

take the electrical wiring off the terminals of the gas valve one at a time, and clean the contacts with a food grade electronics contact cleaner and degreaser. Make sure all wiring is tight, not loose fitting, and clean. The thermo coupler, or sometimes used thermopile (multiple thermocouples in one) generates a small amount of electrical current when heated. The oil residue on a gas valve's electrical contacts SHORTS OUT THE MINUTE CURRENT GENERATED not giving enough current to hold the valve open.

The next thing, how high is your pilot set? If the flame is not striking the thermo pile properly, if its not directally in the flame, it will not generate enough current to hold the gas valve open. Sometimes a dirty thermo pile just cleaned up with sandpaper will work again (accumulated material acts as an insulator)

If you have access to a very high end electrical meter that is capable of measurung MICRO AMPS (very few) then you should check the actual current ouput of the themo pile.

Another thing, the gas valve solonoid MAY BE DEFECTIVE! IF YOUR THERMO PILE is of the screw in type vrs screwed on type, remove the gas valve end, degrease the inside and also that of the thermo pile surfaces, then use the CLEAN errasser of a pencil to clean both the inside of the gas valve connection, and also that of the thermo pile contacts. NO ERRASSER RESIDUE CAN BE LEFT ON EITHER SURFACE! Do not touch these contact surfaces with your hands because even the resistance of the body oil on these surfaces can mean the differance between it working or not!

The thermo pile or a thermo couple generates a minute amount of current that holds the gas valve on.

PS: and that didn't even cost you a dime, I'm off to an emergewncy service call to fix yet another McDonalds deeping fryer (don't call them beeping fryers cause they beep either!!!)

You should determine how many amps the unit is pulling, you will need an ammeter to do this. Continuity through the internal circuit breaker does not determine the current being pulled by fryer only that it can pull current. If the fryer is pulling more than 50 amps the problem will be in the fryer, if it is less than 50 and the breaker trips you could have a faulty breaker.

my pilot is lighting but my deep fryer wont light