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COMBUSTION AND VENTILATION AIR (cont .)
POWER VENT SYSTEMS
When vertical venting is not possible, the only acceptable
method for horizontal venting is with the use of Tjernlund model
GPAK-1TR or Field Controls models SWG-4R power venter .
Type B vent pipe and fittings must be used . Common venting is
not permitted
All application and installation instructions supplied with
the power venter must be followed .
Please address all questions regarding power venter installa-
tion, agency listings and furnace model compatibility to:
Tjernlund Products, Inc .
(800) 255-4208 or (612) 426-2993
Field Controls L .L .C .
(800) 742-8368 or (919) 522-0214
EXISTING VENT SYSTEMS
IMPORTANT RETROFIT
VENTING INSTRUCTIONS
If this furnace is a replacement installation, ALWAYS INSPECT
the existing vent system to be sure there are no obstructions,
blockages, or signs of corrosion .
When the existing furnace is removed from a venting system
serving other appliances, the venting is likely to be too large to
properly vent the remaining attached appliances .
The following steps shall be followed with each appliance that
remains connected to the common venting system, while the
other appliances that remain connected to the common venting
systems are not in operation .
NOTE: When the vent table permits more than one diame-
ter of pipe for a connector or vent, the smallest permitted
diameter must be used .1 . Seal any unused openings in the
common venting system .
NOTE: Ensure existing venting system complies with latest
addition of National Fuel Gas Code ANSI Z223 .1 and all local
codes/regulations .
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1 . Visually inspect the venting system for proper size and hori-
zontal pitch and determine that there is no blockage, restric-
tion, leakage, corrosion or other deficiencies which could
cause an unsafe condition .
2 . Insofar as is practical, close all building doors, windows and
all doors between the space where the appliances remaining
connected to the common venting system are located . Turn
on clothes dryers and any appliance not connected to the
common venting system . Turn on any exhaust fans, such as
range hoods and bathroom exhausts, so they will operate
at maximum speed . Do not operate a summer exhaust fan .
Close fireplace dampers .
3 . Follow the lighting instructions . Place the appliance being
inspected into operation . Adjust the thermostat so the appli-
ance will operate continuously .
4 . Test for spillage at the draft hood relief opening after 5 min-
utes of main burner operation . Use the flame of a match or
candle, or smoke from a cigarette, cigar, or pipe .
5 . After it has been determined that each appliance that remains
connected to the common venting system properly vents
(when tested as outlined above) return doors, windows,
exhaust fans, fireplace dampers and any other gas-burning
appliance to their previous conditions of use .
6 . If improper venting is observed during any of the above tests,
the common venting system must be resized . Refer to Na-
tional Fuel Gas Code, ANSI Z223 .1 .
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