Optional Electric Heat; Optional Gas Heat; Electric Heat Minimum Supply Air; Gas Application Data - York ZR Series Installation Manual

5167531-YIM-J-1019

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.
Table 12: Electric heat minimum supply air
Size (tons) Model
078
ZR
(6.5)
090
ZR
(7.5)
102
ZR
(8.5)
120
ZR
(10)
150
ZR
(12.5)

Optional gas heat

The optional gas-fired heaters have aluminized-steel or optional
stainless steel, tubular heat exchangers with spark ignition.
Table 13: Gas application data
Unit
Input (MBH)
Size Opt.
N12
078
N18
N12
090
N18
N12
102
N18
N18
120
N24
N18
150
N24
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
30
Voltage
208/230-3-60
460-3-60
600-3-60
208/230-3-60
460-3-60
600-3-60
208/230-3-60
460-3-60
600-3-60
208/230-3-60
460-3-60
600-3-60
208/230-3-60
460-3-60
600-3-60
Temp. rise
Output (MBH)
120 96
180 144
120 96
180 144
120 96
180 144
180 144
240 192
180 144
240 192
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 12 for
minimum CFM limitations. See Table 10 for electrical data.
9
1950
1950
1950
2250
2250
2250
2550
2550
2550
-
-
-
-
-
-
cases unless they are superseded by local codes or gas utility
requirements.
See Table 14, Gas pipe sizing - capacity of pipe, on page 31.
The heating value of the gas may vary by locality. You must
check the value with the local gas utility.
(°F)
20-50
35-65
15-45
30-60
10-40
25-55
20-50
35-65
10-40
25-55
Figure 25: Side entry gas piping
Minimum supply air (CFM)
Heater kW
18 24
1950 1950
1950 1950
1950 1950
2250 2250
2250 2250
2250 2250
2550 2550
2550 2550
2550 2550
3000 3000
3000 3000
3000 3000
3750 3750
3750 3750
3750 3750
Johnson Controls Ducted Systems
36 54
1950 -
1950 -
1950 -
2250 -
2250 -
2250 -
2550 -
2550 -
2550 -
3000 3500
3000 3000
3000 3500
3750 4000
3750 3750
3750 3750
OPTIONAL
COIL
GUARD
SHOWN