1.5.3 VENTING OF GAS TRAIN COMPONENTS
Gas pressure regulator - The regulator must be
vented to the outside air, using minimum 1/4"
tubing or pipe. The vent line should terminate in a
downward direction to be free of restriction.
Diaphragm gas valves (V48A or V88A) - The vent
line off of these gas valves must be vented to
outdoors, the same as the regulator.
Normally open vent valves - These valves must
be piped to outdoors using pipe no smaller than
that of the valve.
Gas pressure switches - Vent these switches to
outdoors using a minimum of 1/4" tubing or
piping.
FIGURE 1.5A: GAS BURNER CONNECTION
NOTE: USE PIPE COMPOUND THAT IS RESISTANT TO THE ACTION OF LIQUID PETROLEUM GAS. DO NOT
USE TEFLON TAPE.
1.6 ELECTRICAL CONNECTION
IMPORTANT
:
All electrical connections must
conform to the National Electrical Code and to all
other applicable State and Local Codes. Atmospheric
boilers require a 120 volt, single phase power
connection plus ground. See boiler wiring
diagram and equipment list for details.
Equipment Grounding - The boiler must be grounded
in accordance with the American National Standard
Electrical Code, ANSI/NFPA #70-1981.
1.7 COMBUSTION AIR SUPPLY
IMPORTANT
:
Positive means for supplying an
ample amount of outside air, allowing complete
combustion of the gas, must be provided.
Movable combustion air dampers, automatic or
manually adjustable, must be electrically interlocked
with the boiler to prevent boiler operation if the
dampers are closed.
Combustion air openings must never be blocked or
obstructed in any manner.
The boiler room must be at a positive or neutral
pressure relative to the outdoors. A negative in the
boiler room will result in downdraft problems and
incomplete combustion due to the lack of air.
WARNING!
Failure to provide an adequate air supply will result in
boiler damage and hazardous conditions in the
building (fire and asphyxiation hazard as well as
equipment damage).
COMBUSTION AIR: Complete combustion of natural
or propane gas requires approximately ten cubic foot
of air (at sea level and 70 F) for each 1000 Btu of
boiler input. In reality additional air is required to
achieve complete combustion. Air is also required for
the proper operation of the appliance draft diverter or
barometric damper. The combustion air opening
recommendations below are designed to provide the
air needed for atmospheric gas fired boilers which are
equipped with either draft diverters or barometric
Summary of Contents for AB Series
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