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FILTER PERFORMANCE
The airflow capacity data published in the "Blower Perfor-
mance" table shown 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.
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.
Recommended Filter Sizes (High velocity 600 FPM)
Cabinet
CFM
Size
1000
A
1200
B
1600
C
2000
C
2000
D
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.
Unit Clearances to Combustibles
Application
Upflow
Top
1"
Vent
0"
Rear
0"
Side
0"
Front*
0"
Floor
Combustible
Closet
Yes
Line Contact
No
1. For combustible floors only when used with special sub-base.
* - 24" clearance in front and 18" on side recommended for service access.
All furnaces approved for alcove and attic installation.
ACCESSORIES
Propane (LP) Conversion Kit - This accessory conversion kit
may be used to convert natural gas (N) units for propane (LP)
operation.
S1-1NP0347 - All Models
Concentric Vent Termination - For use through rooftop, side-
wall. Allows combustion air to enter and exhaust to exit through
single common hole. Eliminates unslightly elbows for a cleaner
installation.
S1-1CT0302 (2") & S1-1CT0302-636 (2")
S1-1CT0303 (3") & S1-1CT0303-636 (3")
Johnson Controls Unitary Products
Side
Bottom
(in)
(in)
16 x 25
14 x 25
16 x 25
16 x 25
16 x 25
20 x 25
(2) 16 x 25
20 x 25
(2) 16 x 25
22 x 25
Downflow
Horizontal
0"
0"
0"
0"
0"
0"
0"
1"
0"
0"
1
Combustible
Combustible
Yes
Yes
No
Yes
Sidewall Vent Termination Kit - For use on sidewall, two-pipe
installations only. Provide a more attractive termination for loca-
tions where the terminal is visable on the side of the home.
S1-1HT0901 (3")
S1-1HT0902 (2")
Condensate Neutralizer Kit - Neutralizer cartridge has a 1/2"
plastic tube fittings for installation in the drain line. Calcium car-
bonate refill media is also available from the Source 1 Parts
(P/N 026-30228-000).
1NK0301
Side Return Filter Racks -
S1-1SR0200 - All Models
S1-1SR0402 - 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.
S1-1BR0514 or 1BR0614 - For 14-1/2" cabinets
S1-1BR0517 or 1BR0617 - For 17-1/2" cabinets
S1-1BR0521 or 1BR0621 - For 21" cabinets
S1-1BR0524 or 1BR0624 - For 24-1/2" cabinets
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.tible floor base kit provides access for
combustible airflow.
S1-1CB0514 - For 14-1/2" cabinets
S1-1CB0517 - For 17-1/2" cabinets
S1-1CB0521 - For 21" cabinets
S1-1CB0524 - For 24-1/2" cabinets
EAC Transition Kits - For installation of EAC accessories with
these furnaces to provide easy transition of return airflow
through the EAC to get the proper sealing and reduced airflow
leakage.
S1-1TK1001 - For all models using side return
S1-1TK1014 - For 14-1/2" cabinets using bottom return
S1-1TK1017 - For 17-1/2" cabinets using bottom return
S1-1TK1021 - For 21" cabinets using bottom return
S1-1TK1024 - For 24-1/2" cabinets using bottom return
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.
S1-1PS3306 - 060
S1-1PS3307 - 040, 080
S1-1PS3302 - 100, 120
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.
700723-LTG-A-0811
3
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