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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
NOMINAL
NUMBER
KW
AHKD15-3A
15
AHKD15-4A
15
AHKD20-3A
20
AHKD20-4A
20
AHKD30-3A
30
AHKD30-4A
30
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
Correction Factor
1
KW Correction Factors (-4A Models)
Supply Voltage
480
Correction Factor
1
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)
DAX0904 Temperature Rise Table (°F) - 7.5Ton
KW
CFM
15
2800
15
2900
15
3000
15
3100
15
3200
20
2800
20
2900
20
3000
20
3100
20
3200
30
2800
30
2900
30
3000
30
3100
30
3200
ELECTRICAL
STAGES
CHARACTERISTICS
208-240/3/60
480/3/60
208-240/3/60
480/3/60
208-240/3/60
480/3/60
230
220
210
0.92
0.84
0.77
460
440
415
0.92
0.84
0.75
208
240
12
16
12
16
11
15
11
15
10
14
16
22
16
21
16
21
16
20
15
20
24
32
23
31
23
30
21
29
21
29
DAX1204 Temperature Rise Table (°F)
DAX1204 Temperature Rise Table (°F) - 10Ton
KW
15
15
15
15
1
15
1
20
2
20
2
20
2
20
2
20
30
30
30
30
30
208
0.75
NOTE: Temperature rise tables are calculated
with both stages of electric heat engaged (2 stage
heat systems).
380
0.63
Electrical Supply Wire and MOP
FIRE HAZARD!
To avoid the risk of property damage, personal injury or
fire, use only copper conductors.
480
16
HIGH VOLTAGE
16
Disconnect all power before servicing or
15
installing this unit. Multiple power sources
may be present. Failure to do so may cause
15
property damage, personal injury or death.
14
22
21
21
20
HIGH VOLTAGE!
To avoid property damage, personal injury or death due to
20
electrical shock, this unit MUST have an uninterrupted,
32
unbroken electrical ground. The electrical ground
circuit may consist of an appropriately sized electrical
31
wire connecting the ground lug in the unit control box
30
to the building electrical service panel. Other methods
of grounding are permitted if performed in accordance
29
with the National Electric Code (NEC) / American National
29
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.
5
CFM
208
240
3800
9
12
3900
9
12
4000
9
12
4100
9
12
4200
8
11
3800
12
17
3900
12
16
4000
12
16
4100
12
15
4200
11
15
3800
19
25
3900
18
24
4000
18
24
4100
17
23
4200
17
23
CAUTION
WARNING
WARNING
480
12
12
12
12
11
17
16
16
15
15
25
24
24
23
23