035-15241-003 Rev. A (201)
6
Unitary Products Group
16. Install the top cap at the opposite end of furnace from the
vent blower, using the seven sheet metal screws saved
earlier. See Figure 3.
17. Install the bottom cap on the bottom of the furnace using
the sheet metal screws saved earlier. See Figure 3.
18. The conversion is now complete. The furnace may now
be installed in the downflow position or in the horizontal
position on either side.
FURNACE LOCATION
This furnace is design certified for installation in an alcove,
closet, basement, attic, garage or utility room. The 50-125
MBH models may be installed in an upflow, downflow or hori-
zontal position on either side. The 150 MBH model may be
installed in an upflow or a horizontal left or right position. It is
certified only for use in a home constructed on-site or a man-
ufactured home completed at the final site. This furnace is not
design certified to be installed outdoors, in a mobile home,
trailer or recreational vehicle.
The furnace should be located as close to the chimney or
vent as possible and as close to the center of the warm air
distribution system as possible.
When the furnace is installed in a residential garage it must
be located and installed such that it will be protected from
damage by vehicles. The furnace must be installed so that
the burners are a minimum of 18" above the floor.
CLEARANES TO COMBUSTIBLE MATERIALS
Proper clearances from the furnace to any combustible mate-
rials must be maintained. These required minimum clear-
ances are shown below and on a label in the furnace.
Minimum Clearances - Upflow
Front:. . . . . . . . . . . . . . . . . 2 inches
Back: . . . . . . . . . . . . . . . . . 0 inches
Sides: . . . . . . . . . . . . . . . . 0 inches
Top: . . . . . . . . . . . . . . . . . . 1 inch
B-1 Vent: . . . . . . . . . . . . . . 1 inch
Single-wall Vent: . . . . . . . . 6 inches
Floor . . . . . . . . . . . . . . . . . combustible:
Minimum Clearances - Downflow
Front: . . . . . . . . . . . . . . . . 2 inches
Back:. . . . . . . . . . . . . . . . . 0 inches
Sides: . . . . . . . . . . . . . . . . 0 inches
Top:. . . . . . . . . . . . . . . . . . 1 inch
B-1 Vent: . . . . . . . . . . . . . . 1 inch
Single-wall Vent: . . . . . . . . 6 inches
Floor: . . . . . . . . . . . . . . . . non-combustible
For installation on combustible flooring only when installed on
the special downflow sub-base listed in the Specifications
Table on Page 3.
Minimum Clearances - Horizontal
Front: . . . . . . . . . . . . . . . . 2 inches
Back:. . . . . . . . . . . . . . . . . 0 inches
Ends: . . . . . . . . . . . . . . . . 1 inch
Top:. . . . . . . . . . . . . . . . . . 1 inch
B-1 Vent: . . . . . . . . . . . . . . 1 inch
Single-wall Vent: . . . . . . . . 6 inches
Floor: . . . . . . . . . . . . . . . . combustible
When the furnace is installed in the horizontal position, line
contact is permissible. The line formed by the intersection of
the top and sides of the furnace may be in contact with com-
bustible material.
Provide sufficient space around and in front of the furnace for
service and cleaning. Allow a minimum of 24 inches from the
front of the furnace for service clearance. If the furnace is to
be installed in a close clearance closet, the door should be of
adequate size to allow for removal of the furnace should it
become necessary.
.
NOTE:
This furnace must be installed so the electrical com-
ponents are protected from water.
FIGURE 5 :
TOP CAP
UPFLOW
VENT
OPENING
DOWNFLOW
VENT
OPENING
Do not install the furnace on its back. Doing so
could cause a fire, resulting in damage, injury or
death.
Failure to maintain proper clearances to combus-
tible materials can cause a fire, which could result
in damage, death or personal injury.
