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UNT-PRC001-EN 39
Table ED-1. Electric Heat kW
Unit Size Unit Voltage kW kW kW kW kW kW kW kW kW kW kW
02 115 1.0 1.5 2.0
230 1.0 1.5 2.0
277 1.0 1.5 2.0
208 0.8 1.1 1.5 1.9
03 115 1.0 1.5 2.0 2.5
230 1.0 1.5 2.0 2.5
277 1.0 1.5 2.0 2.5
208 0.8 1.1 1.5 1.9 2.3
04 115 2.0 2.5 3.0
230 2.0 2.5 3.0
277 2.0 2.5 3.0
208 1.5 1.9 2.3 3.0
06 115 2.0 3.0
230 2.0 3.0 4.0 5.0 6.0
277 2.0 3.0 4.0 5.0 6.0
208 1.5 2.3 3.0 3.8 4.5 5.3
08 115 2.0 3.0
230 2.0 3.0 4.0 5.0 6.0 7.0
277 2.0 3.0 4.0 5.0 6.0 7.0
208 1.5 2.3 3.0 3.8 4.5 5.3 6.0
10 115 3.0
230 3.0 4.0 5.0 6.0 7.0 8.0
277 3.0 4.0 5.0 6.0 7.0 8.0
208 2.3 3.0 3.8 4.5 5.3 6.0
12 115 3.0
230 3.0 4.0 5.0 6.0 7.0 8.0 10.0
277 3.0 4.0 5.0 6.0 7.0 8.0 10.0
208 2.3 3.0 3.8 4.5 5.3 6.0
Table ED-2. Electric Heat kW — Low Vertical Units
Unit Size Unit Voltage kW kW kW kW
03 115 1.0 1.5 2.0
04 115 1.0 1.5 2.0 2.5
06 115 1.0 1.5 2.0 2.5
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
+ Heater Amps (If Applicable)
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