Technical Guide

635425-YTG-D-0413
Johnson Controls Unitary Products 7
Electrical Data - (For Multi-Source Power Supply) - Copper Wire - 208/230-3-60
Models
Heater
Model
Minimum Circuit Ampacity
Max. O.C.P.
1
Amps/Type
75°C Wire Size - AWG
Circuit
1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd
208/230 208/230 208/230 208/230 208/230 208/230 208/230 208/230 208/230
MX20D 4HK16502525 45.1/50.8 22.8/27.6 –/– 45/50 20/20 –/– 8/6 10/10 –/–
1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.
KW & MBH CONVERSIONS
FOR
208-VOLT
OPERATION MULTIPLY
240-VOLT
TABULATED KW & MBH BY
.751
230-VOLT 240-VOLT .918
Electrical Data - Cooling Only (60 Hz)
Models
Total Motor Amps Minimum Circuit Ampacity
Max. O.C.P.
Amps/Type
1
1. OCP = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.
Minimum Wire
Size A.W.G.
60 Hertz 60 Hertz
208V 230V 208V 230V
12B 2.8 2.8 3.5 3.5 15 14
12D 2.8 2.8 3.5 3.5 15 14
16C 4.1 4.1 5.2 5.2 15 14
20D 6.0 6.0 7.5 7.5 15 14