Technical Guide

635425-YTG-D-0413
6 Johnson Controls Unitary Products
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2. Heaters are 3 Phase.
Electrical Data - (For Multi-Source Power Supply) - Copper Wire 1 Ø - 208/230-1-60
Models
Heater
Models
Min. Circuit Ampacity
Max. O.C.P.
Amps/Type
1
75°C Wire Size - AWG
Circuit Circuit 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
MX12B
4HK16501306 42.6/48.6 17.1/20.6 -/- 45/60 20/25 -/- 8/8 10/10 –
4HK165N1506 46.7/53.5 19.2/23.1 -/- 50/60 25/25 -/- 8/6 10/10 –
MX12D
4HK16501306 40.8/47.1 21.6/24.1 -/- 50/50 25/25 -/- 8/8 10/10 –
4HK16501506 46.7/53.5 19.2/23.1 -/- 50/60 25/25 -/- 8/6 10/10 –
4HK16501806 43/49.4 37.1/44 -/- 50/60 40/50 -/- 8/6 8/8 –
4HK16502006 46.7/53.5 40.9/48.1 -/- 50/60 45/50 -/- 8/6 8/8 –
MX16C
4HK16501306 41.6/47.9 22.4/25.0 -/- 50/50 25/30 -/- 8/8 10/8 –
4HK16501506 48.4/55.1 19.1/23.2 -/- 50/60 25/25 -/- 8/6 10/10 –
4HK16501806 44.6/50.3 37.0/44.1 -/- 50/60 40/50 -/- 8/6 8/8 –
4HK16502006 48.4/54.5 40.8/48.2 -/- 50/60 45/50 -/- 6/6 8/6 –
MX20D
4HK16501306 42.9/49.1 23.6/26.2 -/- 50/50 25/30 -/- 8/8 10/8 –
4HK16501506 50.8/57.5 19.4/23.7 -/- 60/60 25/25 -/- 8/6 10/10 –
4HK16501806 47.1/53.3 37.3/44.6 -/- 50/60 40/50 -/- 8/6 8/8 –
4HK16502006 50.8/57.5 41.1/48.7 -/- 60/60 45/50 -/- 6/6 8/6 –
4HK16502506 50.8/57.5 41.1/48.7 19.4/23.7 60/60 45/50 25/25 6/6 8/6 10/10
1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.
Electrical Data - 208/230-3-60
Models
Heat Kit -
Three Phase
Max.
Static
Min.
Speed
Tap
Total Heat
1
KW Staging
KW MBH W1 Only W2 Only W1 + W2
208V 230V 208V 230V 208V 230V 208V 230V 208V 230V
MX12B
4HK06501025 0.5 Med/#3 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6
4HK065N1525 0.5 Med/#3 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4
MX16C
4HK06501025 0.5 Lo/#5 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6
4HK06501525 0.5 Lo/#5 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4
4HK06501825 0.5 Lo/#5 12.9 17.2 44.7 58.7 12.9 17.2 12.9 17.2 12.9 17.2
MX20D
4HK06501025 0.5 Lo/#5 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6
4HK06501525 0.5 Lo/#5 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4
4HK16502525 0.5 Lo/#5 18 24 61.4 81.4 9 12 18 24 18 24
1. See conversion Table 10.
Electrical Data - (For Single Source Power Supply) - Copper Wire - 208/230-3-60
Models
Heat Kit -
Three Phase
Heater
Amps
240V
Field Wiring
Min. Circuit Ampacity
Max. O.C.P.
1
Amps/Type
75°C Wire Size - AWG
208V 230V 208V 230V 208V 230V
MX12B
4HK06501025 23.1 28.5 32.4 30 35 10 8
4HK065N1525 34.7 41 46.9 45 50 8 8
MX16C
4HK06501025 23.1 30.1 33.3 35 35 10 8
4HK06501525 34.7 42.6 47.8 45 50 8 8
4HK06501825 41.4 49.9 56.2 60 60 8 6
MX20D
4HK06501025 23.1 32.6 36.3 40 40 10 8
4HK06501525 34.7 45.4 50.8 50 60 8 8
4HK06501825 34.7 70.1 79.7 80 90 8 6
1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.