ECR 075 97gb, Installation, Operation & Maintenance Manual

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7-5 Manual Main Gas Shutoff Valve Outside Boiler
Jacket
Option: Gas
Connection May be
Located
At Bottom of Boiler
Manual Main Gas
Shutoff Valve
7.3 Near Boiler Gas Piping
• Select top or bottom gas connection. To convert from
top connection to bottom connection:
• Remove bottom knockout by removing two (2)
screws. See figure 7-1.
• Disconnect gas connection by removing two (2)
screws. See figure 7-2.
• Relocate gas connection to bottom opening.
Secure with two (2) screws. See figure 7-3.
• Relocate knockout cover to top opening. Secure
with two (2) screws. See figure 7-4.
• Install field sourced manual main shutoff valve and
ground joint union. See figure 7-5.
7.4 Leak Check Gas Piping
Pressure test boiler and gas connection before placing
boiler in operation.
• Pressure test over 1/2 psig (3.5 kPa). Disconnect
boiler and its individual gas shutoff valve from
gas supply system.
• Pressure test at 1/2 psig (3.5 kPa) or less.
Isolate boiler from gas supply system by closing
manual gas shutoff valve. See figure 7-6.
• Locate leakage using gas detector, noncorrosive
detection fluid, or other leak detection method
acceptable to authority having jurisdiction. Do
not use matches, candles, open flames, or other
methods providing ignition source.
• Correct leaks immediately and retest.
7 - GAS SUPPLY PIPING
7-4 Gas Connection Knockout Plate at Top of Boiler
7-6 Gas Shutoff Valve
Top of Boiler Cover for
Gas Connection
Gas shutoff valve
(shown in closed
position)
DANGER
Fire Hazard. Do not use matches, candles, open
flames, or other methods providing ignition source.
Failure to comply will result in death or serious
injury.
!