Henny Penny 680 KFC Service Manual page 16

The fryer must be isolated from the gas supply piping
system by ciosing its individual manual shutoff valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than l/2
PSIG (3.45 kPa).
A standard 3/4 inch, black steel pipe and malleable
fittings should be used for gas service connections.
Do not use cast iron fittings.
Although 314 inch size pipe is recommended, piping should be of
adequate size and installed to provide a supply of gas sufficient to
meet the maximum demand without undue loss of pressure between
the meter and the fryer. The pressure loss in the piping system
should not exceed 0.3 inch water column.
Provisions should be made for moving the fryer for cleaning
and servicing. This may be accomplished by:
I. Installing a manual gas shut off valve and disconnect union, or
2. Installing a heavy duty design A.G.A. certified connector which
complies with standard connectors for moveable gas appliances.
ANSI 221.69 (the latest edition) or CAN 1 6. IOhM. Also, a
quick disconnect coupling which complies with the Standard for
Quick Disconnect Devices for use with Gas Fuel, ANSI 21.41 (the
latest edition) or CAN I 6.9M79. Also, adequate means must be
provided to limit the movement of the fryer without depending on
the connector and any quick-disconnect device or it's associated
piping to limit the fryer movement.
3. See the illustration on the following page for the proper
connections of the flexible gas line and cable restraint.
Prior to turning the gas supply on, be sure the gas dial cock on the
fryer gas valve is in the OFF position.
After the piping and fittings have been installed, check for gas leaks. A
simple checking method is to turn on the gas brush all connections with
a soap solution. If bubbles and occur, it indicates escaping gas. In this
event, the piping connection must be redone.
Never use a lighted ma ame to test for gas leaks.
Escaping gas could cause an explosion resulting in severe personal
injury and/or property damage.