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Installation
13
Gas Connection
PRESSURE REGULATION AND TESTING
DFG-50 ovens are rated at 27,500 BTU/Hr. (8.1
kW) (29 MJ) or 34,500 BTU/Hr. (10.1 kW) (36 MJ)
per section. Each oven has been adjusted at the
factory to operate with the type of gas specified on
the rating plate.
Inlet Pressure
Natural Propane
Min Max Min Max
W.C. 7.0 10.5 11.0 13.0
kPa 1.43 2.61 2.74 3.23
Manifold Pressure
Natural Propane
W.C. 3.5 10.0
kPa .87 2.49
D
Inlet Pressure --- the pressure of the gas before
it reaches the oven.
D
Manifold Pressure --- the pressure of the gas
as it enters the main burner(s).
D
Min --- the minimum pressure recommended to
operate the oven.
D
Max --- the maximum pressure at which the
manufacturer warrants the oven’s operation.
Each oven is supplied with a regulator to maintain
the proper gas pressure. The regulator is essen-
tial to the proper operation of the oven and
should not be removed. It is preset to provide the
oven with 3. 5” W.C. (0.87 kPa) for natural gas and
10.5” W.C. (2.50 kPa) for Propane at the manifold.
DO NOT INSTALL AN ADDITIONAL REGULATOR
WHERE THE OVEN CONNECTS TO THE GAS
SUPPLY U NLESS THE I NLET P RESSURE IS
ABOVE MAXIMUM.
Prior to connecting the oven, gas lines should be
thoroughly purged of all metal filings, shavings,
pipe dope, and other debris. After connection, the
oven should be checked for correct gas pressure.
The oven and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressuresinexcessof1/2psig(3.45kPa).
The oven must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure testing of the
gas piping system a t test pressures equal or less
than 1/2 psig (3.45kPa).
Gas Connection 4” (101.6 mm)
Gas Connect ion 2.75” (69.9 mm)
Figure 9