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IX, Vent Flue Pipe and Combustion Air Pipe for details. NOTE: In
addition to the required clearances to combustible materials, a mini-
mum of 36 inches service clearance must be available in front of the
unit.
T O P
S ID E
S ID E
B O T TO M
U pflow
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 Product Data Book applicable to your model* for minimum clear-
ances 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.
F
S
URNACE
USPENSION
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.
PROVIDE 8" MINMUM CLEARANCE BETWEEN
CENTER ROD AND FURNACE CABINET
TO ALLOW FOR CIRCULATOR BLOWER REMOVAL
3/8" DIAMETER
THREADED ROD
(6 PLACES)
HOLD DOWN
NUTS
SUPPORT
NUTS
2"
2"
1/8" ANGLE IRON
X
X
(3 PLACES)
POSITION AS CLOSE AS POSSIBLE
TO BLOWER DECK TO ALLOW FOR
CIRCULATOR BLOWER REMVOAL
Suspended Furnace
E
F
R
XISTING
URNACE
EMOVAL
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 Z21.47b-2002, CSA-2.3b-2002 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 con-
nected 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 Installation Codes and these instructions. Determine that there
is no blockage or restriction, leakage, corrosion and other deficien-
cies which could cause an unsafe condition;
T O P
S ID E
B O T T O M
C ou nte rflo w
H orizo n ta l
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
TILT OUTWARD TO ALLOW FOR
DOOR AND CIRCULATOR BLOWER
REMOVAL
*NOTE: Please contact your distributor or our website for the applicable
product data book referred to in this manual.
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
system. Turn on any exhaust fans, such as range hoods and bath-
room 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 open-
ing 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 Na-
tional Fuel Gas Code NFPA 54/ANSI Z223.1 and/or CSA B149 In-
stallation Codes.
If resizing is required on any portion of the venting system, use the
appropriate table in Appendix G in the latest edition of the National
Fuel Gas Code ANSI Z223.1 and/or CSA B149 Installation Codes.
T
L
HERMOSTAT
OCATION
In an area having good air circulation, locate the thermostat about
five feet high on a vibration-free inside wall. Do not install the ther-
mostat where it may be influenced by any of the following:
•
Drafts, or dead spots behind doors, in corners, or under
cabinets.
•
Hot or cold air from registers.
•
Radiant heat from the sun.
•
Light fixtures or other appliances.
•
Radiant heat from a fireplace.
•
Concealed hot or cold water pipes, or chimneys.
•
Unconditioned areas behind the thermostat, such as an
outside wall.
DRAFTS OR DEAD SPOTS
-BEHIND DOORS
-IN CORNERS
-UNDER CABINETS
Thermostat Influences
Consult the instructions packaged with the thermostat for mounting
instructions and further precautions.
8
HOT
COLD
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