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SUPER MARATHON SERIES GAS FRYERS
CHAPTER 3: INSTALLATION INSTRUCTIONS
3-7
3.4 Gas Connections (cont.)
Regulating Gas Pressure
The fryer and shut-off valve must be disconnected from the gas supply during any pressure testing of
the system.
External gas regulators are not normally required on this fryer. A safety control valve protects the
fryer against pressure fluctuations. If the incoming pressure is in excess of ½" PSI (3.45 kPa/35
mbar), a step-down regulator will be required.
DANGER
When pressure-testing incoming gas supply lines, disconnect the fryer from the gas line if
the test pressure is ½" PSI [3,45 kPa/35 mbar (14 inches W.C.)] or greater to avoid damage to
the fryer’s gas piping and gas valve(s).
A. Manifold Pressure: A service technician should check the manifold pressure with a manometer.
1. Check the rating plate for manifold gas pressures. Natural gas units normally require 4-
inches W.C. (10 mbars), and propane units normally require 11-inches W.C. (27 mbars) gas
pressure.
2. Confirm that the arrow forged into the bottom of the regulator body, which indicates gas
flow direction, is pointed downstream towards the fryers. The air vent cap is also part of the
regulator and should not be removed.
3. If a vent line from the gas pressure regulator is used, it should be installed in accordance
with local codes or in the absence of local codes, with the appropriate national or European
Community (CE) standards.
WARNING
Use a diluted soap solution to find potentially dangerous gas leaks when making new
connections.
B. Regulators: Gas regulators can be adjusted in the field, but no adjustments should be made unless
the regulator is out of adjustment, or serious pressure fluctuations are observed.
C. Only qualified service personnel should make adjustments to the regulators.
D. Orifices: The fryer can be configured to operate on any available gas. The correct safety control
valve, appropriate gas orifices, and pilot burner are installed at the factory. While the valve can
be adjusted in the field, only qualified service personnel should make any adjustments with the
proper test equipment.