Wells GAS GRIDDLES, Operation Manual

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6
D. GAS PIPING REQUIREMENTS
1. PRESSURE REGULATOR
Each Griddle is shipped with a PRESSURE REGULATOR matching the fuel type on which the
Griddle, its gas valve, pilots and burner orifices are designed to operate. The Regulator supplied
with this griddle must be used, and must be installed with its outlet connection connected to the
inlet pipe of the Griddle. Failure to install the Regulator, or improper installation of the Regulator (i.e.
reversing the connections) will void the warranty, and may result in a hazardous condition and/or
damage to the gas valve.
2. GAS PIPING
a. Supply piping should be a minimum of ¾” black iron pipe with a sediment trap (drip leg),
consisting of a pipe tee and 4” nipple with cap, to prevent dirt from entering the control
valves.
Consult local codes and ordinances for guidance, or, in the absence of local
codes, use the National Gas Code ANSI Z223.1 and N.F.P.A. #54.
b. Be sure all gas piping is clean and free from obstructions, dirt and piping compounds.
c. Pipe thread compounds should be of a type that is resistant to the action of Propane and
LP (Liquified Petroleum) gasses.
d. DO NOT use Teflon tape or Teflon pipe thread compound on the inlet connection; use a
quality pipe thread compound. Apply thread compound sparingly to the male threads only.
3. GAS SUPPLY SHUT-OFFVALVE
For safety, an individual manual shut-off valve must be installed in the gas supply piping and prior to
the Pressure Regulator for the Griddle.
4. GAS PIPE PRESSURE TESTING
a. The main piping system must be capable of supplying the Griddle with sufficient volume/flow
of fuel to satisfy the maximum operational input requirements.
b. Make sure the supply piping system has been pressure tested before the regulator and
Griddle are connected. If the system must be re-tested, be sure the regulator is isolated by a
manual shut-off valve, in order to prevent damage to the regulator and Gas Griddle valves.
c. Piping and connections should be leak tested using a water/soap solution. Do NOT use
flame to check for gas leaks.
d. Equipment gas pressure (the pressure downstream of the pressure regulator) may be tested
by adapting a water column gauge to one of the plugged ports on the main gas manifold.
The pressure regulator supplied with the Gas Griddle is factory set for a nominal gas pressure
of 5” w.c.
e. Be sure to remove any adapters, and to re-plug and leak check the port before returning the
Griddle to service. Leak testing should be performed using a water/soap solution. Do NOT
use flame to check for gas leaks.
NOTE: The maximum inlet pressure from the supply piping must not exceed ½ p.s.i (14” W.C.)
Pressure above this limit will damage the regulator and gas valves in the Gas Griddle.
5. GAS SUPPLY FLOW VOLUME TESTING REQUIREMENTS
While testing for adequate gas pressure, be sure all other gas appliances that utilize the same
source piping are in operation with burners ON in order to ensure accurate operational conditions. If
flow volume in the system piping is marginal, and should other appliances on that system not be
consuming gas while testing for pressure, the test results may be inaccurate.