NEED GRIDDLE LP HOOK UP HELP!!!!!

Ok so here is what happened I called Royal the other day to see if my hook up was ok they said yes. Well I went to fire it up today and nothing!!!!! I had propane in the line up to the regulator but the pilot would not fire. So I called them back and the other guy said my hook up was wrong and I blew the regulator So could someone tell me the right way . This is how I have it hooked up . Regulator right at the back of the griddle like ROYAL said  hooked up to a 3/8 40,000 btu (Yellow) gas line connected back to the 3/4 pipe to the propane tank. The guy I just talked to said it had to be 3/4 the entire way and that I needed a step down or 2nd stage regulator before the regulator I blew at the back of the griddle So before I blow another $30 regulator CAN SOMEONE PLEASE HELP!!!!!
 
Thanks
Roger

You should have the regulator at the back of your griddle, as you do now. But, in addition, you need to have another regulator attached directly to your tank before you go into yellow gas line.  I have a Connorton Griddle running at 11 w.c. at this is what it requires - not 100% sure about a Royal but generally this would be the typical setup.

Does it have to be at the tank or can it be on the line somewhere ? Also do I need the 3/4 gas line or can I use the 3/8 thats on there?
 
Thanks

If the installation instruction did not state the max. line pressure and the need for the step-down regulator, I would expect them to replace the blown regulator.    .... You should always have a regulator at the tank valve; most piping is not rated to work at tank pressure (a couple of 1000 psi ???).
 
If the 3/8 yellow line was part of the griddle, then it might be possible to use a smaller pipe than the 3/4.    But more info is needed to be sure.

Thanks ,Yep I tried to get a replacement but no luck did not call for a step-down. Headed to town in the morning to pick up another . Any particular step-down to get ?

I think you need to go by your gas supplier, show them the setup & plumbing and ask for their advice.     ... With the info you've given so far there is no way to give any advice.    ... I'm sure from what you have stated already, you were just lucky the gas lines didn't burst and cause a BIG fire with total loss of your truck.   ????   If you can't get to the tank valve, then there is not way to quickly put out the fire before the tank empties.
 
You need to know the operating pressure of each piece of equipment.   The piece with the  highest required pressure will determine the line pressure (regulator setting)at the tank.  .... The input pressure for the grill regulator will determine if a another step down regulator is required before the grill.  I suspect another regulator is not required.   The grill regulator should be a step-down from normal LP line pressures to low-pressure feed to the grill.

OK ... correction, it's been a while since I've worked with LP gas.    The vapor pressure of the LP tank might be as high as 140 psi. This depends on how hot the tank get in the sun.    So my statement of 'couple of 1000' psi is wrong.      ... The normal line pressure for most appliances & LP lines is 11" water (4/10's psi).   ... Some high pressure appliances may need more.

I am having issues with my food truck as well.  Im at about 18000 BTU with a 36" griddle, 2-16" Crepe makers, and a panini press..
I have a 100# tank with a 2 stage regulator.  Then, each appliance as a 1/2 psi regulator.
Today I fired it all up for the first time.  Even with the equipment on low, all of the equipment stayed too hot.. The duel stage regulator is a fisher rs232, supposed to be rated to 350,000 BTU. 

hotgrillz


I am having issues with my food truck as well.  Im at about 18000 BTU with a 36" griddle, 2-16" Crepe makers, and a panini press..
I have a 100# tank with a 2 stage regulator.  Then, each appliance as a 1/2 psi regulator.
Today I fired it all up for the first time.  Even with the equipment on low, all of the equipment stayed too hot.. The duel stage regulator is a fisher rs232, supposed to be rated to 350,000 BTU. 

The dual stage regulator and 1/2 psi regulator is 3 regulators.  One is redundant and unnecessary.
In a 2 stage regulator setup, the high pressure regulator (at tank) steps the tank pressure down service line pressure; but at a pressure sufficient to supply ALL LP appliances.  This would be at a pressure greater than required appliance pressure.  The high pressure regulator reduces tank pressure, but insures a steady non fluctuating gas supply jn the service line.   ... The 2nd stage regulator (at appliance) steps down service line pressure to required appliance pressure.
 
You didn't say it the 1/2 psi regulators are adjustable or not.    .... If your appliances are too hot at low;  first reduce the pressure at the dual stage regulator; then make final adjustments at the appliance regulator.     more info at http://www.propane101.com/integraltwinstageregulators.htm