402697-LTG-B-1008
Johnson Controls Unitary Products
3
FILTER PERFORMANCE
The airflow capacity data published in the “Blower Perfor-
mance” table represents blower performance WITHOUT filters.
All applications of these furnaces require the use of field
installed air filters. All filter media and mounting hardware or
provisions must be field installed external to the furnace cabi-
net. DO NOT attempt to install any filters inside the furnace.
NOTE:
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 of a 20 x 25
filter.
NOTES:
1. Air velocity through throwaway type filters may not exceed 300 feet per
minute (91.4 m/min). All velocities over this require the use of high velocity
filters.
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.
ACCESSORIES
PROPANE (LP) CONVERSION KIT -
1NP0680 - All Models
This accessory conversion kit may be used to convert natural
gas (N) units for propane (LP) operation.
SIDE RETURN FILTER RACKS -
1SR0200 - All Models
1SR0302 - All Models
1SF0101 - All Models
BOTTOM RETURN FILTER RACKS -
1BR0514 or 1BR0614 - For 14-1/2” cabinets
1BR0517 or 1BR0617 - For 17-1/2” cabinets
1BR0521 or 1BR0621 - For 21” cabinets
1BR05xx series are galvanized steel filter racks. 1BR06xx are
pre-painted steel filter racks to match the appearance of the fur-
nace cabinet.
COMBUSTIBLE FLOOR BASE KIT -
For installation of these furnaces in downflow applications
directly onto combustible flooring material, These kits are
required to prevent potential overheating situations. These kits
are also required in any applications where the furnace in
installed in a downflow configuration without an evaporator coil,
where the combustible floor base kit provides access for com-
bustible airflow.
1CB0514 - For 14-1/2” cabinets
1CB0517 - For 17-1/2” cabinets
1CB0521 - For 21” cabinets
EAC TRANSITION KITS -
For installation of EAC accessories with these furnaces to pro-
vide easy transition of return airflow through the EAC to get the
proper sealing and reduced airflow leakage.
1TK1001 - For all models using side return
1TK1014 - For 14-1/2” cabinets using bottom return
1TK1017 - For 17-1/2” cabinets using bottom return
1TK1021 - For 21” cabinets using bottom return
1TK1024 - For 24-1/2” cabinets using bottom return
HIGH ALTITUDE
- No high altitude kits are required.
ROOM THERMOSTATS
- A wide selection of compatible ther-
mosets are available to provide optimum performance and fea-
tures for any installation.
1H/1C, manual change-over electronic non-programmable ther-
mostat.
1H/1C, auto/manual changeover, electronic programmable,
deluxe 7-day, thermostat.
1H/1C, auto/manual changeover, electronic programmable.
* For the most current accessory information, refer to the price
book or consult factory.
Recommended Filter Sizes
CFM
Cabinet
Size
Side
(in)
Bottom
(in)
1200
A
16 x 25
14 x 25
1200
B
16 x 25
16 x 25
1600
C
16 x 25
20 x 25
2000
C
(2) 16 x 25
20 x 25
Unit Clearances to Combustibles
Application
Top
Front
Rear
Left
Side
Right
Side
Flue
Floor/
Bottom
Closet
Alcove
Attic
Line
Contact
Upflow B-Vent
1
3
0
0
0
1
Combustible
Yes
Yes
Yes
No
Downflow B-Vent
1
3
0
0
0
1
1
1
1. Special floor base or air conditioning coil required for use on floor.
Yes
Yes
Yes
No
Horizontal B-Vent
1
3
0
0
0
1
Combustible
No
Yes
Yes
Yes
2
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 building
joists, studs or framing.
