5808011-JIM-A-0320
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Johnson Controls Ducted Systems
Optional electric heat
The factory-installed heaters are wired for single point power
supply. You only need to bring the power supply into the single
point terminal block.
These CSA approved heaters are located within the central
compartment of the unit with the heater elements extending in
to the supply air chamber.
Fuses are supplied, where required, by the factory. Some kW
sizes require fuses and others do not. See Table 13 for
minimum CFM limitations.See Table 11 for electrical data.
Optional gas heat
The optional gas-fired heaters have aluminized-steel or optional
stainless steel, tubular heat exchangers with spark ignition.
Gas piping
Proper sizing of gas piping depends on the cubic feet per hour
of gas flow required, specific gravity of the gas, and the length
of run.
Follow the “National Fuel Gas Code” Z223.1 (in U.S.A.) or the
current Gas Installation Codes CSA-B149.1 (in Canada) in all
cases unless they are superseded by local codes or gas utility
requirements.
Gas pipe sizing - capacity of pipe,
The heating value of the gas may vary by locality. You must
check the value with the local gas utility.
Figure 22: Side entry gas piping
Table 13: Electric heat minimum supply air
Size (tons)
Model
Voltage
Minimum supply air (CFM)
Heater kW
9
18
24
36
54
J06
(6.5)
ZB
208/230-3-60
1950
1950
1950
1950
-
460-3-60
1950
1950
1950
1950
-
600-3-60
1950
1950
1950
1950
-
J07
(7.5)
ZB
208/230-3-60
2250
2250
2250
2250
-
460-3-60
2250
2250
2250
2250
-
600-3-60
2250
2250
2250
2250
-
J08
(8.5)
ZB
208/230-3-60
2550
2550
2550
2550
-
460-3-60
2550
2550
2550
2550
-
600-3-60
2550
2550
2550
2550
-
J10
(10)
ZB
208/230-3-60
-
3000
3000
3000
3500
460-3-60
-
3000
3000
3000
3000
600-3-60
-
3000
3000
3000
3500
J12
(12.5)
ZB
208/230-3-60
-
3750
3750
3750
4000
460-3-60
-
3750
3750
3750
3750
600-3-60
-
3750
3750
3750
3750
OPTIONAL
COIL
GUARD
SHOWN