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255029-YTG-M-0610
10 Johnson Controls Unitary Products
2. Heaters are 3 Phase.
COOLING MODELS WITH ELECTRIC HEAT WIRING
* Optional dehumidification humidistat switch contacts open on humidity rise.
Notes:
1. “Y” Terminal on Air Handler Control Board must be connected for full CFM and applications requiring 60 second blower off delay for SEER
enhancement.
2. Move HUM STAT Jumper on AH Control Board to YES position if Humidistat is used.
3. MODE Jumper on AH control board should be set to A/C for air conditioners.
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 240V 208V 240V 208V 240V
AHP24B**H21 4HK06501025 23.1 27.1 31.3 30 35 10 8
AHP30B**H21
4HK06501025 23.1 26.8 30.8 30 35 10 8
4HK065N1525 34.7 40.0 46.1 40 50 8 8
AHP36C**H21
4HK06501025 23.1 27.5 31.6 30 35 10 8
4HK06501525 34.7 40.0 46.1 40 50 8 8
AHP42C**H21
4HK06501025 23.1 29.1 33.4 30 35 10 8
4HK06501525 34.7 41.6 47.9 50 50 8 8
4HK06501825 41.4 48.9 56.3 50 60 8 6
AHP48D**H21
4HK06501025 23.1 29.3 33.6 30 35 10 8
4HK06501525 34.7 41.8 48.1 50 50 8 8
4HK06501825 41.4 49.0 56.5 50 60 8 6
AHP60D**H21
4HK06501025 23.1 34.5 38.4 35 40 8 8
4HK06501525 34.7 47.0 52.9 50 60 8 6
1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.
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
208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240
AHP60D**H21
4HK16501825 31.9/35.4 22.4/25.9 –/– 35/40 25/30 –/– 8/8 10/10 –/–
4HK16502525 40.8/45.6 31.3/36.1 –/– 45/50 35/40 –/– 8/8 8/8 –/–
1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.
COOLING MODELS WITH ELECTRIC HEAT WIRING
MA SERIES - Air Handler Control Wiring
Typical A/C - Cooling only Applications
THERMOSTAT
AIR HANDLER
BOARD
1-STAGE
AIR CONDITIONING
RR
G
Y
W1
W2
C
G
W1
W2
Y
C
Y/Y2
Y1
O
HUM
X/L
COM
HUMIDISTAT
*
THERMOSTAT
AIR HANDLER
BOARD
1-STAGE
AIR CONDITIONING
RR
G
Y
W1
W2
C
G
W1
W2
Y
C
Y/Y2
Y1
O
HUM
X/L
COM
HUMIDISTAT
*
MA SERIES - Air Handler Control Wiring
Typical A/C with Electric Heat Applications