Lang GCCO-C, Service Manual

Page: 8 / 73

8
INSTALLATION CONT’D
GAS CONNECTION
This appliance is manufactured for use with the type of gas indicated on the data plate.
Contact the factory if the gas type does not match that which is on the data plate.
All gas connections must be in accordance with local codes and comply with the National
Fuel Gas Code ANSI Z223.1 latest edition.
An internal gas pressure regulator is located inside the control compartment.
Gas must be delivered to the appliance regulator at less than 1/2 pound of pressure and less
than 1/2-inch water column pressure drop.
The internal regulator is preset at the factory, however, due to gas pressure variations from
area to area, adjust the regulator to provide the manifold pressure indicated on the data
plate. This should be 5 inches water column for natural gas and 10 inch water column for
propane. A 1/8-inch NPT tap is provided on the main manifold for checking regulator
pressure. Access the main manifold by removing the trim piece below the oven doors.
When replacing the 1/8-inch plug in the main manifold a joint sealant that is resistant to the
action of liquid petroleum gas must be used.
The supply piping must be of sufficient size to provide 55,000 BTU/hr per oven. A 1/2-
inch NPT connection is provided at the rear of the oven directly behind the control
compartment. Connect each oven separately.
A gas shut off valve must be installed to the oven(s) and located in an accessible area.
This appliance and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of 1/2
PSGI (3.45 kPA) and the appliance must be isolated from the gas supply piping system by
closing its individual manual shutoff valve during any pressure testing of the gas supply
system at test pressures equal to or less than 1/2 PSIG (3.45 kPA).
Test for gas leaks. Use a commercial leak detector or a soap and water solution.
FLU EXTENSION
A flu extension must be installed on the lower oven of a stacked set.
The extension attaches to the flu opening of the lower oven and directs the flu products
into the flu opening of the upper oven.
This extension must be installed.
The ovens may now be set into position. Be careful if sliding the ovens, they are not
designed to slide over cracks or obstructions in the floor.