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Single side return above 1800 CFM is approved as long as
the filter velocity does not exceed filter manufacturer's rec-
ommendation and a transition is used to allow use on a
20x25 filter.
Unit Clearances to Combustibles (All dimensions in inches, and all surfaces identified with the unit in an upflow configuration)
Application
Top
Upflow
1
Upflow B-Vent
1
Downflow
1
Downflow B-Vent
1
Horizontal
1
Horizontal B-Vent
1
1. Special floor base or air conditioning coil required for use on combustible floor.
2. Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the furnace jacket and build-
ing joists, studs or framing.
ACCESSORIES
Propane (LP) Conversion Kit - This accessory conversion kit
may be used to convert natural gas units for propane (LP) oper-
ation.
1NP0347 - All Models
Side Return Filter Racks -
1SR0200 - All Models
1SR0302 - All Models
Bottom Return Filter Racks - 1BR05xx series are galvanized
steel filter racks. 1BR06xx are pre-painted steel filter racks to
match the appearance of the furnace cabinet.
1BR0514 or 1BR0614 - For 14-1/2" cabinets
1BR0517 or 1BR0617 - For 17-1/2" cabinets
1BR0521 or 1BR0621 - For 21" cabinets
Masonry Chimney Kits - For installations where these fur-
naces are vented using existing or new lined masonry chim-
neys.
1CK0603
1CK0604
Johnson Controls Unitary Products
Left
Front
Rear
Side
6
0
0
3
0
0
6
0
0
3
0
0
6
0
0
3
0
0
Recommended Filter Sizes
CFM
1200
1200
1600
2000
1. Air velocity through throwaway type filters may not exceed 300 feet per min-
ute (91.4 m/min). All velocities over this require the use of high velocity fil-
ters.
2. Do not exceed 1800 CFM using a single side return and a 16x25 filter. For
CFM greater than 1800, you may use two side returns or one side and the
bottom or one return with a transition to allow use of a 20x25 filter.
Right
Floor/
Flue
Side
Bottom
3
6
Combustible
0
1
Combustible
1
3
6
1
1
0
1
1
3
6
Combustible
0
1
Combustible
Combustible Floor Base Kit - For installation of these fur-
naces in downflow applications directly onto combustible floor-
ing material. These kits are required to prevent potential
overheating situations. These kits are also required in any appli-
cations where the furnace in installed in a downflow configura-
tion without an evaporator coil, where the combustible floor
base kit provides access for combustible airflow.
1CB0514 - For 14-1/2" cabinets
1CB0517 - For 17-1/2" cabinets
1CB0521 - For 21" cabinets
High Altitude Pressure Switches - For installation where the
altitude is less than 5,000 feet it is not required that the pres-
sure switch be changed. For altitudes above 5,000 feet, see kits
below.
1PS3301 060, 080, 120
1PS3302 100
Thermostats - Compatible thermostat controls are available
through accessory sourcing. For optimum performance and
installation, refer to the UPGNET "Low Voltage Wiring Diagram"
document to select and apply controls.
445348-YTG-D-0612
Cabinet
Side
Size
(in)
A
16 x 25
B
16 x 25
C
16 x 25
C
(2) 16 x 25
Closet
Alcove
Attic
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Bottom
(in)
14 x 25
16 x 25
20 x 25
20 x 25
Line
Contact
No
No
No
No
2
Yes
2
Yes
3
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