Blodgett 1060 - Manual (Page 13)

11
Installation
Gas Connection
PRESSURE REGULATION AND TESTING
Each section of the 1060-B series oven is rated at 85,000
BTU per hour (24.9 kW). At full demand, each section
1060-BL oven requires 85 cubic feet per hour (2.4 m3)
Natural gas or 33 cubic feet per hour (0.9 m3) Propane
gas. Each oven has been adjusted at the factory to oper-
ate 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
• 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 SUP-
PLY UNLESS THE SUPPLY EXCEEDS THE MAXIMUM
PRESSURE.
Due to the decrease in oxygen at higher elevations,
above 2000’, the unit may need to be rerated. (The orifice
size may need to be adjusted to accomodate different air
pressures at higher elevations.) If not rerated, incomplete
combustion may occur releasing Aldehydes and CO or
Carbon Monoxide. Any of these are unacceptable and
may be hazardous to the health of the operator.
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).