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266180-BIM-B-0209
10. Flange plate shipped with 3500-7211* is mounted to the furnace
with eight (8) screws provided. Two (2) blunt screws are for the
holes in the front of the furnace. See Figure 11.
11. If upflow adapter box kit 3500-5451* is not used, then our optional
filter bracket is provided with 3500-7211* kit. This filter bracket
maybe used to retain filter inside its original location in the furnace.
12. Secure the top of the furnace to a structural member using screws
and the strap on top of the furnace. The mobile home manufac-
turer may provide an equivalent strap, if required, to secure the
furnace.
13. If excessive movement is expected, then some blower support is
recommended.
Flange Plate
(Mounted with screws
FIGURE 11: Blower Bracket and Duct Flange Attachment
TABLE 2: Wiring Requirements
MODELS
Single Branch Circuit Service
Nominal Circuit Load - Amps
Minimum Wire Size (90ºC)
Minimum Wire Size (75ºC)
Minimum Wire Size (60ºC)
Ground Wire Size +
Max. Fuse (or C.B.) - Amps
Dual Branch Circuit Service
Branch Circuit Load - Amps
Branch Circuit Min. - Amps
Minimum Wire Size (90ºC)
Minimum Wire Size (75ºC)
Minimum Wire Size (60ºC)
Ground Wire Size +
Max. Fuse (or C.B.) - Amps
* Requires Jumper Bars (P/N 3500-378P) - Dual Supply for U.S. Only.
+ Refer to National Electrical Code. Table 250-95 for Non-Sheathed Conductor Ground Wire.
6
Use Blunt
Screws Here
Blend Air
Start Collar
Lineset
Knockout
EB Series
(Upflow Furnace)
EB23C*
EB20C*
94.0
84.0
#2
#3
#1
#2
#0
#1
#6
#6
125
110
CKT #1
CKT #2
CKT #1
47.3
46.7
44.0
59.2
58.4
55.0
#6
#6
#8
#6
#6
#6
#4
#4
#6
#10
#10
#10
60
60
60
WIRING
Furnace wiring is complete except for the power supply and the thermo-
stat wires. See wiring diagrams (Figures 16-21) for wire and fuse size.
See Table 2 for ground wire sizes. Thermostat wires connect through
side of furnace and should also be no smaller than 22 gauge. Power
wires can enter through the side of the unit or through the auxiliary
entrance, located in the bottom of the unit. (See Figure 1). When bring-
ing wiring through the bottom of the furnace, cable connectors must be
installed to hold wiring in place and to relieve any strain on the wiring.
These connectors will also serve as a seal between the furnace and the
floor. Thus, additional sealing is not required.
Refer to the National Electrical Code, Canadian Electrical Code and
local codes for wiring material requirements.
NOTE: The furnaces are equipped with either one or two 60 amp circuit
breakers. These circuit breakers protect the wiring inside of the furnace
in the event of a short circuit. Additionally, these breakers provide a
means of disconnecting the power to the unit. The circuit breakers in
the furnace are not meant to protect the branch circuit wiring between
the furnace and the home's breaker panel. General wire and breaker
sizes are shown in Table 2. If sheathed cable is used, refer to National
Electrical Code, Canadian Electrical Code and local codes for addi-
tional requirements concerning supply circuit wiring. Electrical Data can
be found in Table 4.
IMPORTANT: All installation on field wiring must be rated at 60ºC or
higher.
Models for EB23C, EB20C, EB17C and EB15C may be connected to a
single or dual branch circuit.
These units are shipped from the factory set up for dual power supply
connections. For single power supply connections, jumper bars (P/N
3500-378P*) are required and are available from the factory. EB12C is
factory shipped with jumper bars in place. See Figure 12.
EB17C*
2 Leads + 1 Ground CKT#1
70.7
#4
#3
#2
#8
90
CKT #2
CKT #1
CKT #2
40.0
47.3
23.4
50.0
59.2
29.3
#8
#6
#10
#8
#6
#10
#6
#4
#10
#10
#10
#10
50
60
30
EB15C*
EB12C
64.0
50.7
#4
#6
#4
#6
#3
#4
#8
#8
80
70
CKT #1
CKT #2
44.0
20.1
55.0
25.2
#8
#10
NOT
APPROVED
#6
#10
#6
#10
#10
#10
60
30
Johnson Controls Unitary Products
EB10C
44.0
#8
#6
#6
#10
60
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