Technical Guide

253461-YTG-P-0513
10 Johnson Controls Unitary Products
ACCESSORIES
Refer to Price Manual for specific model numbers.
Electric Heaters - Models shown under Electrical Data include
sequencers and temperature limit switches and fusible links for
safe, efficient operation. Circuit breakers are provided where
shown. Not for 115 Volt models.
Suspension Kit - Suspension Kit Model 1BH0601 is designed
specifically for upflow application of the units contained in this
technical guide. For suspension of these units in horizontal
applications, it is recommended to use angle support brackets
with threaded rods at locations shown in air handler installation
instructions.
Filter Rack for Combustible Floor - If an electric heat acces-
sory which is rated for greater than zero clearance to combusti-
ble surfaces is installed in these air handlers in the downflow
operating positions on a combustible floor, one of the following
filter rack accessory models is required: S1-1FB1817, S1-
1FB1821, or S1-1FB1824.
Filter Rack Accessory
DIMENSIONS
Filter Rack Models
Used With
Rack Dimensions Inches Filter Dimensions Inches
Multi-Position A B C D Width Length Thickness
S1-1FR0817 MA08B, MA12B 17-1/2 16-3/8 15-1/2 21 16 20 1
S1-1FR0821 MA16C 21 19-7/8 19 21 20 20 1
S1-1FR0824 MA14D, MA20D 24-1/2 23-3/8 22-1/2 21 24 20 1
1/2”
22”
C
19-7/8”
B
D
1-1/2”
3-1/2”
A
22”
21”
1/2”
(All four sides)
2” Max
Thick
Filter
3/4”
1/2”
3-1/2”
1/2”
7/8”
NOTE: May be used with up to a 2” filter.
Required for downflow application.
May also be used in upflow application.
Comes with 1” permanent filter.
All dimensions are inches. They are subject to change
without notice. Certified dimensions will be provided upon
request.
1”
A
16-1/2”
20”
23-1/2”
ACCESSORY FOOTPRINT