If the furnace is to be installed in a crawl space, consult local
codes. A suitable concrete pad or blocks are recommended for
crawl space installation on the ground.
NOTE: 5" bottom clearance required for condensate trap.
Thirty (30) inches between the front of the furnace and adjacent
construction or other appliances MUST be maintained for service
clearance.
Keep all insulating materials clear from Iouvered door. Insulating
materials may be combustible.
3. Combustion & Ventilation Air
Poison carbon monoxide gas Hazard.
The horizontal furnaces may be installed directly on combustible
wood flooring or supports as long as all required furnace clear-
ances are met. See Figure 3.
This furnace MUST NOT be installed directly on carpeting or tile
or other combustible material other than wood flooring or sup-
ports.
For horizontal installation over a finished living space. A field fab-
ricated auxiliary drain pan with drain pipe is recommended to pre-
vent damage by overflow due to blocked condensate drain.
Vent Check
Use methods described here to provide
combustion and ventilation air.
Failure to provide adequate combustion and
ventilation air can result in death and/or
personal injury.
Ventingand CombustionAir Check
NOTE: The following information is supplied to allow the installer
to make adjustments to the setup of existing appliances, IF
REQUIRED, based on good trade practices, local codes, and
good judgement of the installer. Manufacturer does NOT take re-
sponsibility for modifications made to existing equipment.
NOTE: If this installation replaces an existing furnace from a
commonly vented system, make sure there is adequate combus-
tion air for all appliances, MAKE THE FOLLOWING CHECK.
1. Seal any unused openings in the venting system.
Visually inspect the venting system for proper size and hor-
izontal pitch to ensure there is no blockage or restriction,
leakage, corrosion or other deficiencies which could cause
an unsafe condition.
Insofar as is practical, close all doors and windows and all
doors between the space in which the appliance(s) remain-
ing connected to the venting system are located and other
spaces of the building.
Vent Pipe--_ I A/ Draft Hood
Typical Gas
WaterHeater / Matc.
I I
I 1
7. After it has been determined that each appliance vents
properly, return doors, windows, appliances etc. to their
normal condition.
8. If improper venting is observed, the cause MUST be cor-
rected using the appropriate tables in code books of coun-
try having jurisdiction.
NOTE: if flame pulls towards draft hood, this indicates sufficient
venting.
NOTE: Non direct vent appliances occupying same enclosed
space as furnace MUST have enough air for proper combustion
and ventilation. All duct or openings for supplying combustion and
ventilation air must comply with the gas and electrical codes of the
country having jurisdiction.
When the installation is complete, check that all appliances have
adequate combustion air and are venting properly. See Venting
And Combustion Air Check in this manual.
Air Openingsand ConnectingDucts
1. Total input rating for all non direct vent gas appliances
MUST be considered when determining free area of open-
ings.
2. Connect ducts or openings directly to outside.
3. When screens are used to cover openings, they MUST be
no less than 1/4" mesh.
4. The minimum dimension of rectangular air ducts MUST
NOT be less than 3".
G3
Turn on clothes dryers and any appliance not connected to
the 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.
Followthe lighting instructions for each appliance being in-
spected. Adjust thermostat so appliance(s) will operate
continuously.
Allow 5 minutes of main burner operation, then check for
spillage at the draft hood relief opening of each appliance.
Use the flame of a match or candle (Figure 5).
5. When sizing grille or louver, use the free area of opening. If
free area is NOT stamped or marked on grill or louver, as-
sume a 20% free area for wood and 60% for metal.
Confined SpaceInstallation
NOTE: A confined space is defined as an area with less than 50
cubic feet per 1,000 BTUH input rating for all gas appliances
installed in the area.
Requirements
1. Provide confined space with sufficient air for proper com-
bustion and ventilation of flue gases using horizontal or
vertical ducts or openings.
44001 101004
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