5
The electrical characteristics of the airhandler, the electric
heat kit, and the building power supply must agree.
The air handlers listed in this manual do not have factory
installed electric heat. Electric heat is available as an
accessory. If installing this option, the
ONLY
heat kits that
can be used are the AHKD series.
AHKD MODEL
NUMBER
NOMINAL
KW
ELECTRICAL
CHARACTERISTICS
STAGES
AHKD15-3A
15
208-240/3/60
1
AHKD15-4A
15
480/3/60
1
AHKD20-3A
20
208-240/3/60
2
AHKD20-4A
20
480/3/60
2
AHKD30-3A
30
208-240/3/60
2
AHKD30-4A
30
480/3/60
2
For all supply voltages, use the correction factors in the
following tables, multiplied by KW and (or) temperature rise
to have corrected results.
KW Correction Factors (-3A Models)
Supply Voltage
240
230
220
210
208
Correction Factor
1
0.92
0.84
0.77
0.75
KW Correction Factors (-4A Models)
Supply Voltage
480
460
440
415
380
Correction Factor
1
0.92
0.84
0.75
0.63
The heating mode temperatures rise is dependent upon
the system airflow, the supply voltage, and the heat kit size
(KW) selected. Use the following table to determine the
temperature rise (°F).
DAX0904 Temperature Rise Table (°F)
KW
CFM
208
240
480
15
2800
12
16
16
15
2900
12
16
16
15
3000
11
15
15
15
3100
11
15
15
15
3200
10
14
14
20
2800
16
22
22
20
2900
16
21
21
20
3000
16
21
21
20
3100
16
20
20
20
3200
15
20
20
30
2800
24
32
32
30
2900
23
31
31
30
3000
23
30
30
30
3100
21
29
29
30
3200
21
29
29
DAX0904 Temperature Rise Table (°F) - 7.5Ton
DAX1204 Temperature Rise Table (°F)
KW
CFM
208
240
480
15
3800
9
12
12
15
3900
9
12
12
15
4000
9
12
12
15
4100
9
12
12
15
4200
8
11
11
20
3800
12
17
17
20
3900
12
16
16
20
4000
12
16
16
20
4100
12
15
15
20
4200
11
15
15
30
3800
19
25
25
30
3900
18
24
24
30
4000
18
24
24
30
4100
17
23
23
30
4200
17
23
23
DAX1204 Temperature Rise Table (°F) - 10Ton
NOTE: Temperature rise tables are calculated
with both stages of electric heat engaged (2 stage
heat systems).
Electrical Supply Wire and MOP
CAUTION
FIRE HAZARD!
To avoid the risk of property damage, personal injury or
fire, use only copper conductors.
WARNING
HIGH VOLTAGE
Disconnect all power before servicing or
installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury or death.
HIGH VOLTAGE!
To avoid property damage, personal injury or death due to
electrical shock, this unit MUST have an uninterrupted,
unbroken electrical ground. The electrical ground
circuit may consist of an appropriately sized electrical
wire connecting the ground lug in the unit control box
to the building electrical service panel. Other methods
of grounding are permitted if performed in accordance
with the National Electric Code (NEC) / American National
Standards Institute (ANSI) / National Fire Protection
Association (NFPA) 70 and local/state codes. In Canada,
electrical groundings is to be in accordance with the
Canadian Electrical code (CSA) C22.1.
WARNING
