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FURNACE SUSPENSION
If suspending the furnace from rafters or joists, use 3/8" threaded rod
and 2”x2”x1/8” angle iron as shown below. The length of rod will de-
pend on the application and the clearances necessary.
TILT OUTWARD TO ALLOW FOR
DOOR AND CIRCULATOR BLOWER
REMOVAL
3/8" DIAMETER
THREADED ROD
(6 PLACES)
PROVIDE 8" MINMUM CLEARANCE BETWEEN
CENTER ROD AND FURNACE CABINET
TO ALLOW FOR CIRCULATOR BLOWER REMOVAL
ASSURE FURNACE IS LEVEL FROM
END TO END AND HAS A SLIGHT
FORWARD TILT WITH THE FRONT
OF THE FURNACE 0"-3/4"
BELOW THE BACK OF THE FURNACE
POSITION AS CLOSE AS POSSIBLE
TO BLOWER DECK TO ALLOW FOR
CIRCULATOR BLOWER REMVOAL
2"
X
2"
X
1/8"
ANGLE IRON
(3 PLACES)
HOLD DOWN
NUTS
SUPPORT
NUTS
Suspended Furnace
EXISTING FURNACE REMOVAL
NOTE: When an existing furnace is removed from a venting system
serving other appliances, the venting system may be too large to
properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the American
National Standard/National Standard of Canada for Gas-Fired Cen-
tral Furnaces ANSI Z21.47-Latest Edition, CSA-2.3b--Latest Edition
Section 1.23.1.
The following steps shall be followed with each appliance connected to the
venting system placed in operation, while any other appliances connected
to the venting system are not in operation:
a. Seal any unused openings in the venting system;
b. Inspect the venting system for proper size and horizontal pitch, as
required by the National Fuel Gas Code, ANSI Z223.1 or the CSA
B149.1-05.1-05 Installation Codes and these instructions. Deter-
mine that there is no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe condition;
c. In so far as practical, close all building doors and windows and all
doors between the space in which the appliance(s) connected to the
venting system are located and other spaces of the building. Turn on
clothes dryers and any appliance not connected to the venting sys-
tem. Turn on any exhaust fans, such as range hoods and bathroom
exhausts, so they shall operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers;
d. Follow the lighting instructions. Place the appliance being inspected
in operation. Adjust thermostat so appliance shall operate continu-
ously;
e. Test for draft hood equipped spillage at the draft hood relief opening
after 5 minutes of main burner operation. Use the flame of a match
or candle;
f. After it has been determined that each appliance connected to the
venting system properly vents when tested as outlined above, re-
turn doors, windows, exhaust fans, fireplace dampers and any other
gas burning appliance to their previous conditions of use;
g. If improper venting is observed during any of the above tests, the
common venting system must be corrected.
Corrections must be in accordance with the latest edition of the
National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CSA B149.1-
05.1-05 Installation Codes.
• Seal off a non-direct vent furnace if it is installed near an
area frequently contaminated by any of the above substances.
This protects the non-direct vent furnace from airborne
contaminants. To ensure that the enclosed non-direct vent
furnace has an adequate supply of combustion air, vent from
a nearby uncontaminated room or from outdoors. Refer to
the Combustion and Ventilation Air Requirements for details.
• If the furnace is used in connection with a cooling unit, install
the furnace upstream or in parallel with the cooling unit.
Premature heat exchanger failure will result if the cooling
unit is placed ahead of the furnace.
For vertical (upflow or downflow) applications, the minimum
cooling coil width shall not be less than furnace width minus
1”. Additionally, a coil installed above an upflow furnace or
under a counterflow furnace may be the same width as the
furnace or may be one size larger than the furnace. Example:
a “C” width coil may be installed with a “B” width furnace.
For upflow applications, the front of the coil and furnace must
face the same direction.
• If the furnace is installed in a residential garage, position the
furnace so that the burners and ignition source are located
not less than 18 inches (457 mm) above the floor. Protect
the furnace from physical damage by vehicles.
• If the furnace is installed horizontally, the furnace access
doors must be vertical so that the burners fire horizontally
into the heat exchanger. Do not install the unit with the
access doors on the “up/top” or “down/bottom” side of
the furnace.
CLEARANCES AND A CCESSIBILITY
Installations must adhere to the clearances to combustible mate-
rials to which this furnace has been design certified. The mini-
mum clearance information for this furnace is provided on the unit’s
clearance label. These clearances must be permanently main-
tained. Clearances must also accommodate an installation’s gas,
electrical, and drain trap and drain line connections. If the alternate
vent/flue connection is used, additional clearance must be pro-
vided to accommodate these connections. Refer to Vent Flue Pipe
and Combustion Air Pipe for details. NOTE: In addition to the
required clearances to combustible materials, a minimum of 24
inches service clearance must be available in front of the unit.
TOP
BOTTOM
SIDE SIDE SIDE
TOP
BOTTOM
Upflow Counterflow Horizontal
A furnace installed in a confined space (i.e., a closet or utility room)
must have two ventilation openings with a total minimum free area
of 0.25 square inches per 1,000 BTU/hr of furnace input rating.
Refer to the Specification Sheet applicable to your model for mini-
mum clearances to combustible surfaces. One of the ventilation
openings must be within 12 inches of the top; the other opening
must be within 12 inches of the bottom of the confined space. In a
typical construction, the clearance between the door and door frame
is usually adequate to satisfy this ventilation requirement.