ECR International 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 fi gure 7-1.
Disconnect gas connection by removing two (2)
•
screws. See fi gure 7-2.
Relocate gas connection to bottom opening.
•
Secure with two (2) screws. See fi gure 7-3.
Relocate knockout cover to top opening. Secure
•
with two (2) screws. See fi gure 7-4.
Install fi eld sourced manual main shutoff valve and •
ground joint union. See fi gure 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. Iso-
•
late boiler from gas supply system by closing
manual gas shutoff valve. See fi gure 7-6.
Locate leakage using gas detector, noncorrosive
•
detection fl uid, or other leak detection method
acceptable to authority having jurisdiction. Do
not use matches, candles, open fl ames, 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
Top of Boiler Cover for
Gas Connection
7-6 Gas Shutoff Valve
Gas shutoff valve
(shown in closed
position)
DANGER
Fire Hazard. Do not use matches, candles, open
fl ames, or other methods providing ignition source.
Failure to comply will result in death or serious
injury.
!