Blodgett 900 SERIES - Manual (Page 14)

12
Installation
Gas Connection
PRESSURE REGULATION AND TESTING
900 Series ovens are rated from 20,000 to 50,000 BTU/
Hr. (6.4 to 14.6 kW/Hr.) per section. Each oven has been
adjusted at the factory to operate with the type of gas
specified on the rating plate.
1. Pull out control panel. The rating plate is attached to
the inside of the control compartment.
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. 5.0 10.0
kPa 1.24 2.49
• Inlet Pressure - the pressure of the gas before it
reaches the oven.
• Manifold Pressure - the pressure of the gas as it
enters the main burner(s).
• Min - the minimum pressure recommended to oper-
ate the oven.
• Max - the maximum pressure at which the manufac-
turer warrants the oven’s operation.
Each oven is supplied with a regulator to maintain the
proper gas pressure. The regulator is essential to the
proper operation of the oven and must be installed. 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.
Prior to connecting the oven, gas lines should be thor-
oughly purged of all metal filings, shavings, pipe dope,
and other debris. After connection, the oven should be
checked for correct gas pressure.
Installation must conform with local codes, or in the ab-
sence of local codes, with the National Fuel Gas Code,
NFPA54/ANSI Z223.1-Latest Edition, the Natural Gas In-
stallation Code CAN/CGA-B149.1 or the Propane Instal-
lation Code, CAN/CGA-B149.2 as applicable.
The oven and its individual shutoff valve must be discon-
nected from the gas supply piping system during any
pressure testing of that system at test pressures in ex-
cess of 1/2 psig (3.45kPa).
The oven must be isolated from the gas supply piping
system by closing its individual manual shutoff valve dur-
ing any pressure testing of the gas piping system at test
pressures equal or less than 1/2 psig (3.45kPa).