Gas Supply Piping; General; Leak Check Gas Piping - Dunkirk DCC-150 Installation, Operation & Maintenance Manual

!
WARNING
Fire, explosion, asphyxiation and burn hazard. Boiler
piping and gas connections shall be leak tested before
placing boiler in operation. Failure to follow these
instructions and or improper installation could result in
death or serious injury.
!
CAUTION
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire
department.

7.1 General

• Use piping materials and joining methods acceptable
to authority having jurisdiction. In absence of such
requirements:
• USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54
• Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
• Install manual main shutoff valve before the gas valve
accordance with state and local requirements.
• Size and install gas piping system to provide sufficient gas
supply to meet maximum input at not less than minimum
supply pressure.
A. DCB-125 requires a gas rate of 137.60 ft
for Gas A (Natural Gas) and 101.30 ft
Gas E (Liquid Propane Gas).
B. DCC-150 requires a gas rate of 167.20 ft
for Gas A (Natural Gas) and 122.80 ft
Gas E (Liquid Propane Gas).
• Gas meter and supply pipes must be capable of delivering
the listed quantity of gas in addition to demand from any
other appliances in the house. Boiler requires a 3/4" (19.5
mm) gas supply pipe.
• Support piping with hooks straps, bands, brackets,
hangers, or building structure components to prevent or
dampen excessive vibrations and prevent strain on gas
connection. Boiler will not support piping weight.
• Use thread (joint) compound (pipe dope) suitable for
liquefied petroleum gas.
• Install external field sourced manual main gas shutoff
valve, ground joint union, and sediment trap upstream of
gas controls.
• Install boiler so gas ignition system components are
protected from water dripping, spraying,rain, etc. During
appliance operation and service.
• Leak test boiler and gas line connections before placing
boiler into operation.

7 - GAS SUPPLY PIPING

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.
If overheating occurs or gas supply fails to shut off, do
not turn off or disconnect the electrical supply to the
pump. Shut off gas supply at a location external to the
appliance.
Do not use this boiler if any part has been under water.
Call a qualified service technician before use.
Sediment trap shall be located upstream of gas
controls.

7.2 Leak Check Gas Piping

Pressure test boiler and gas connection before placing
boiler in operation.
/h (3.90 m /h)
3 3
/h (2.87 m /h) for
3 3
/h (4.74 m /h)
3 3
/h (3.48 m /h) for
3 3
If overheating occurs or gas supply fails to shut off, do
not turn off or disconnect electrical supply to pump.
Shut off gas supply at location external to the boiler.
32
!
DANGER
!
WARNING
NOTICE
• 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.
• 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 that can provide ignition source.
• Correct leaks immediately and retest.
NOTICE
240011947 REV B, [03/31/2018]