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UNT-PRC001-EN
Electrical Data
Table ED-1. Electric Heat kW
Unit Size
Unit Voltage
kW
kW
02
115
1.0
230
1.0
277
1.0
208
0.8
03
115
1.0
230
1.0
277
1.0
208
0.8
04
115
230
277
208
06
115
230
277
208
08
115
230
277
208
10
115
230
277
208
12
115
230
277
208
Table ED-2. Electric Heat kW — Low Vertical Units
Unit Size
Unit Voltage
03
115
04
115
06
115
Low vertical units are only available with electric heat in combination with the two-row cooling coil.
Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS) Calculations for
Fan-Coils with Electric Heat
Heater Amps = (Heater kW x 1000)/Heater Voltage
Note: Use 120V heater voltage for 115V units. Use 240V heater voltage for 230V units.
MCA = 1.25 x (heater amps + all motor FLA's)
MFS or HACR Type Circuit Breaker = (2.25 x Largest Motor FLA) + Second Motor FLA
HACR (Heating, Air-Conditioning and Refrigeration) type circuit breakers are required
in the branch circuit wiring for all fan-coils with electric heat.
SeeTables ED- 3 through ED-6 for motor FLA's
Select a standard fuse size or HACR type circuit breaker equal to the MCA.
Use the next larger standard size if the MCA does not equal a standard size.
Standard Fuse Sizes are: 15, 20, 25, 30, 35, 40, 45, 50, 60 amps
Fan-coil electric heat MBH = (Heater kW) (3.413)
Electric Heat
kW
kW
kW
kW
kW
1.5
2.0
1.5
2.0
1.5
2.0
1.1
1.5
1.9
1.5
2.0
2.5
1.5
2.0
2.5
1.5
2.0
2.5
1.1
1.5
1.9
2.3
2.0
2.5
3.0
2.0
2.5
3.0
2.0
2.5
3.0
1.5
1.9
2.3
3.0
2.0
3.0
2.0
3.0
4.0
5.0
2.0
3.0
4.0
5.0
1.5
2.3
3.0
3.8
2.0
3.0
2.0
3.0
4.0
5.0
2.0
3.0
4.0
5.0
1.5
2.3
3.0
3.8
3.0
3.0
4.0
5.0
3.0
4.0
5.0
2.3
3.0
3.8
3.0
3.0
4.0
5.0
3.0
4.0
5.0
2.3
3.0
3.8
kW
kW
1.0
1.5
1.0
1.5
1.0
1.5
+ Heater Amps (If Applicable)
kW
kW
kW
kW
6.0
6.0
4.5
5.3
6.0
7.0
6.0
7.0
4.5
5.3
6.0
6.0
7.0
8.0
6.0
7.0
8.0
4.5
5.3
6.0
6.0
7.0
8.0
10.0
6.0
7.0
8.0
10.0
4.5
5.3
6.0
kW
kW
2.0
2.0
2.5
2.0
2.5
39
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