Dean 52 Series Installation & Operation Manual page 14

3.4 Gas Connections (cont.)
The gas supply (service) line must be the same size or greater than the fryer inlet line. Super Runner
52-Series gas fryers are equipped with a 3/4" (19 mm) male ISO 7.1 inlet. The gas supply line must
be sized to accommodate all gas-fired equipment connected to that gas supply. Consult local gas
companies or suppliers, or your local contractor for minimum supply line requirements.
Supply Line Specifications
The gas supply lines must be sized as indicated in the chart below, based on the total number of
fryers connected to the main gas supply.
Gas Types
Natural Gas
Propane Gas
(*) When exceeding 18 feet (6 meters) for a configuration of more than four fryers, it is necessary
to provide a 1 1/4" (33 mm) rigid gas connection.
All connections MUST be sealed with a joint compound suitable for the gas being
used, and all connections MUST be tested with a soapy solution before lighting any
Rigid Connections
Check any installer-supplied intake pipe(s) visually and clean metal particles or other foreign matter
from the threads 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. 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.
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.
Recommended Gas Supply Line Sizes
Number of Fryers
1
3/4" (19 mm)
1/2" (13 mm)
CAUTION
pilots.
3-5
2 to 3
1" (25 mm)
3/4" (19 mm)
4 or more (*)
1-1/4" (33 mm)
1" (25 mm)