Technical Guide

635425-YTG-D-0413
8 Johnson Controls Unitary Products
POWER WIRING
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.
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 - External filter rack accessories 1FR08* must be
used when unit is installed for application outlined.
Combustible Floor Base - If an electric heat accessory which
is rated for greater than zero clearance to combustible surfaces
is installed in these air handlers in the downflow operating posi-
tions on a combustible floor, one of the following combustible
floor base accessories is required: 1FB1817, 1FB1821, or
1FB1824.
ELECTRIC HEAT
WITHOUT CIRCUIT BREAKER
SINGLE SOURCE (2.5 - 10 KW)
GND. LUG
POWER
SUPPLY
GND.
LUG
ELECTRIC HEAT
WITHOUT CIRCUIT BREAKER
3 PHASE (10 - 15 KW)
GND. LUG
POWER
SUPPLY
GND.
LUG
1 PHASE ELECTRIC HEAT
WITH CIRCUIT BREAKER
AS SHIPPED FROM FACTORY
SINGLE SOURCE
(2.5 - 25 KW) - 25 KW SHOWN
GND. LUG
POWER
SUPPLY
GND.
LUG
1 PHASE ELECTRIC HEAT
WITH CIRCUIT BREAKER
& BREAKER BAR REMOVED
MULTI-SOURCE (15 - 25 KW) - 25 KW SHOWN
GND. LUG
POWER
SUPPLY 1
GND.
LUG
POWER
SUPPLY 2
POWER
SUPPLY 3
TYPICAL WIRING WITHOUT ELECTRIC HEAT
GND. LUG
POWER
SUPPLY
GND.
LUG
POWER WIRING (208/230-1-60)
NOTE: USE ONLY COPPER CONDUCTORS
TERMINAL
BLOCK
TERMINAL
BLOCK
MAYBE1,2,OR3
CIRCUIT BREAKERS
MAYBE1,2,OR3
CIRCUIT BREAKERS
(JUMPER BAR)
CONNECT LEADS WITH WIRE NUTS
(TYPICAL ALL HEAT KITS)
FILTER RACK ACCESSORY
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
DIMENSIONS
Filter Rack Model
Multi-Position
Used With
Rack Dimensions Inches Filter Dimensions Inches
A B C D Width Length Thickness
1FR0817 MX12B 17-1/2 16-3/8 15-1/2 21 16 20 1
1FR0821 MX16C 21 19-7/8 19 21 20 20 1
1FR0824 MX12D, MX20D 24-1/2 23-3/8 22-1/2 21 24 20 1