Frymaster HD1814 SERIES HD21814G - Manual (Page 17)

FRYMASTER HD1814 SERIES GAS FRYERS
CHAPTER 3: INSTALLATION
3-3
3.2 Gas Connections (cont.)
B. Rigid Connections: Check any installer-supplied intake pipe(s) visually and clean threading
chips, or any other foreign matter before installing into a service line. If the intake pipes are
not clear of all foreign matter, the orifices will clog when gas pressure is applied. Seal pipe
joints with a sealant resistive to LP gas. When using thread compound on gas piping, use
very small amounts and only on male threads. Use a pipe thread compound that is not
affected by the chemical action of LP gases. DO NOT apply thread compound to the first
two pipe threads—doing so will cause clogging of the burner orifices and control valve.
C. Manual shut-off valve: This gas service supplier-installed valve must be installed in the gas
service line ahead of the fryers in the gas stream and in a position where it can be reached
quickly in the event of an emergency.
D. Regulating Gas Pressure: The fryer and shut-off valve must be disconnected from the gas
supply during any pressure testing of the system.
1. 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 (14 inches W.C.)] or greater to avoid
damage to the fryer’s gas piping and gas valve(s).
E. Manifold Pressure: Your local service technician should check the manifold pressure with a
manometer.
1. Check the rating plate for specific manifold gas pressures. Natural gas units normally
require 4" W.C., and propane units normally require 11" W.C. gas pressure.
2. Double check the arrow forged into the bottom of the regulator body, which shows gas
flow direction. It should point 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 National Fuel
Gas Code, ANSI Z223.1-(latest edition).
WARNING
Use a diluted soap solution to find potentially dangerous gas leaks when making
new connections.
F. Regulators can be adjusted in the field, but it is recommended that they not be unless the part
is known to be out of adjustment or serious pressure fluctuations are found to exist and can
be solved no other way.