5
reasonably safe and functional installation IF certain stan-
dard procedures are followed. The following are guide-
lines only and are intended to enable the furnace user to
obtain reasonable ef
fi
ciency from his furnace, and with
due respect to safety when installing as a “free-standing
heater”. If installed correctly, and in accordance with the
instructions found in this manual, your warm air furnace
may be installed as a “space heater” within living quarters,
cabins, garage, or workshop. Please adhere to the fol-
lowing:
1. The use of a cold air return and/or
fi
lter box is manda-
tory. This will not only increase your blower life and
provide
fi
ltered air, it will also help prevent the blower
or blowers from “capturing” heated air exiting from the
top of the furnace heat outlets.
2. If installed as purchased, without directing the heat
away from the furnace itself, it will simply sit and cycle,
turning the blowers off and on. The thermostat may
not function properly.
3. All larger furnaces (or those with multi-speed blowers)
absolutely require BACK PRESSURE to prevent pre-
mature motor winding failure. If allowed to operate
at high RPM (As in “FREE AIR” mode - no duct work
or
fl
ow restrictions) the windings overheat, insulation
melts and the motor simply burns up - not covered
under warranty.
CONNECTING HOT AIR DUCT
TO FURNACE
We strongly recommend that the hot air duct work be in-
stalled by a home heating specialist. If doing the installa-
tion yourself, before you decide which installation will best
suit your needs, consult a quali
fi
ed heating technician and
follow his recommendations as to the safest and most ef-
fi
cient method of installation.
The following illustrations are the ONLY acceptable con-
fi
gurations when installed with existing oil or gas furnaces.
INSTALLATION EXAMPLES
Installation #1
With this installation, a back draft damper (optional) is inserted into
the heat run before the plenum of the existing furnace to prevent
air from the existing furnace to blow back into the furnace when it is
not in use. When a back damper is employed, it should be located
as close to the existing furnace plenum as practical.
INSTALLATION #3
The baf
fl
e on this system should be made the full width of the furnace plenum in
order to properly direct the air into the distribution ducts.
INSTALLATION #2
Extending the hot air duct from the furnace into the existing plenum will
help direct the
fl
ow of air from the furnace as well as the
fl
ow in the existing
furnace. Ducting entering the existing plenum at an angle (approximately
45 degrees) will facilitate air
fl
ow from the furnace while diverting air from
the existing furnace.
