Instruction manual

8
ments 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.
• 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 ACCESSIBILITY
Installations must adhere to the clearances to combustible
materials which this furnace has been design certified to.
The minimum clearance information for this furnace is
provided on the unit’s clearance label. These clearances
must be permanently maintained. Clearances must also
accommodate an installation’s gas, electrical, and drain
trap and drain line connections. If the alternate combus-
tion air intake or vent/flue connections are used additional
clearances must be provided to accommodate these con-
nections. Refer to Section IX, Vent Flue Pipe and Combus-
tion Air Pipe for details. NOTE: In addition to the required
clearances to combustible materials, a minimum of 36
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 Specification Sheet for
minimum 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.
FURNACE SUSPENSION
If suspending the furnace from rafters or joist, use 3/8"
threaded rod and 2”x2”x1/8” angle iron as shown below.
The length of rod will depend 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 sys-
tem 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 Central Furnaces ANSI Z21.47-1993,
CAN/CGA-2.3-M93 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
CAN/CGA B149 Installation Codes and these instructions.
Determine 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 con-
nected to the venting system. 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 continuously;
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, return 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 CAN/CGA B149 Installation Codes.