Discharge Of Purged Gases, Venting - American Standard PLC 75-76 Operation, Installation And Service Manual

NOTE: If the equipment room is located against an
outside wall and the air openings communicate directly
with the outdoors, each opening shall have a free area
of not less than one square inch per 4,000 BTU per
hour of the total input rating of all equipment in the
enclosure.
Illustration for Figures 6-9 copyright by the American
Gas Association. Used by permission of the copyright
holder.
DISCHARGE OF PURGED GASES
When removing purged gases from a piping system, care should be taken to not create hazardous condition, such as discharging the gases into a
confined area or in an area which contains an ignition source.
VENT PIPE SYSTEM
The water heater must be connected to the chimney. They vent pipe from the heater to the chimney (vent connector) must be no less than the
diameter of the drafthood outlet on the heater and should slope upward to the chimney at least 1/4 inch per linear foot.
Due to great variances in installations, unforeseeable by the manufacturer of the water heater, increased size vent connectors and pipes may be
necessary for proper venting.
Consult your local utility. They willl aid you in determining the proper venting for your heater from the vent tables in the american National Stand-
ard Z223.I (NFPA 54) "National Fuel Gas Code".
There are various types of vent dampers currently available. Some of these vent dampers are certified by the Canadian Standard Association Labora-
tories. The certifications apply to the vent damper device only and do not mean they are certified for use on this water heater. The use of these
devices is not permitted by the manufacturer of this water heater.
VENTING
IMPORTANT NOTICE
This water heater may be installed as a replacement with venting that met the existing codes at the time of the
installation of the original water heater.
This water heater uses a non-direct, single-pipe vent system to remove exhaust gases created by the burning of fossil fuels. Air for combustion is
taken from the immediate water heater location or is ducted in from the outside (see "Combustion Air Supply and Ventilation").
This water heater must be properly vented for the removal of exhaust gases to the outside atmosphere. Correct installation of the vent pipes
system is mandatory for the proper and efficient operation of this water heater and is an important factor in the life of the unit.
U.L. approved fuel gas and carbon monoxide (CO) detectors are recommended in all applications and should be installed using the manufacturer´s
instructions and local codes, rules, or regulations.
Important: If you lack the necessary skills required to properly install this venting system, you should not proceed,
but get help from a qualified service technician.
MECHANICAL EXHAUSTING AND FIREPLACES
the operation of air- moving devices such as exhaust
fans, ventilation system, clothes dryers fireplaces, etc.
can affect the proper operation of gas utilization
equipment.
Consequently, special attention must be given to
conditions these devices may create to avoid
unsatisfactory operation of the equipment.
13
Figure 9
POTENTIAL HAZARDOUS
DOWNDRAFT OPERATION
. EXHAUST FANS
. VENTILATION SYSTEM
. CLOTHES DRYERS
. FIREPLACES
. OTHERS