Route thermostat cable or equivalent single leads of col- ored wire from subbase terminals to low-voltage connec- tions on unit (shown in Fig. 11) as described in Steps 1 - 4 below.

1.If unit is mounted on roof curb and accessory thru-the- curb service plate connection is used, route wire through connection plate.

2.Pass control wires through the hole provided on unit (see connection D in Connection Sizes table in Fig. 7).

3.Feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control

box. See Fig. 12. The raceway provides the UL-required (Underwriters' Laboratories) clearance between high- and low-voltage wiring.

4.Connect thermostat wires to screw terminals on low- voltage connection board.

HEAT ANTICIPATOR SETTINGS Ð Set heat anticipator settings at .14 amp for the ®rst stage and .20 amp for second- stage heating.

Table 2 Ð Electrical Data

UNIT

NOMINAL

IFM

VOLTAGE

COMPR

OFM

IFM

COMBUSTION

POWER SUPPLY

DISCONNECT

VOLTAGE

RANGE

(ea)

 

(ea)

FAN MOTOR

SIZE*

48TJ

TYPE

 

 

 

 

(60 Hz)

Min

Max

RLA

LRA

Hp

 

FLA

FLA

FLA

MCA

MOCP²

FLA

LRA

 

 

 

 

208/230

Std

187

254

13.6

73.4

1¤4

 

1.4

5.8

.57

39.2/39.2

45/45

41/41

194/194

 

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

008

460

Std

414

508

6.2

37.7

1¤4

 

0.8

2.6

.30

18.0

25

19

99

(71¤2 Tons)

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

Std

518

632

4.9

31.0

1¤4

 

0.8

2.6

.30

14.2

20

15

81

 

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

Std

187

254

15.8

92.0

1¤4

 

1.4

5.8

.57

44.2/44.2

50/50

46/46

231/231

 

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

009

460

Std

414

508

7.4

46.0

1¤4

 

0.8

2.6

.30

20.7

25

22

116

(81¤2 Tons)

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

Std

518

632

5.9

44.0

1¤4

 

0.8

2.6

.30

16.5

20

17

107

 

(3 phase)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

Std

187

254

17.9

110.0

1¤4

 

1.4

5.8

.57

48.9/48.9

60/60

51/51

267/267

 

(3 phase)

Alt

 

7.5

50.6/50.6

60/60

53/53

286/286

 

 

 

 

 

 

 

 

 

012

460

Std

414

508

8.6

55.0

1¤4

 

0.8

2.6

.30

23.4

30

24

134

(10 Tons)

(3 phase)

Alt

 

3.4

24.2

30

25

173

 

 

 

 

 

 

 

 

 

575

Std

518

632

6.4

44.0

1¤4

 

0.8

2.6

.30

17.6

20

18

107

 

(3 phase)

Alt

 

3.4

18.2

20

19

139

 

 

 

 

 

 

 

 

 

 

208/230

Std

187

254

23.0

146.0

1¤4

 

1.4

10.6

.57

65.2/65.2

80/80

68/68

383/383

 

(3 phase)

Alt

 

15.0

69.6/69.6

80/80

73/73

406/406

 

 

 

 

 

 

 

 

 

014

460

Std

414

508

10.4

73.0

1¤4

 

0.8

4.8

.30

29.6

35

31

192

(121¤2 Tons)

(3 phase)

Alt

 

7.4

32.2

35

34

203

 

 

 

 

 

 

 

 

 

575

Std

518

632

8.3

58.4

1¤4

 

0.8

4.8

.30

23.6

30

25

154

 

(3 phase)

Alt

 

7.4

25.7

35

27

163

 

 

 

 

 

 

 

 

 

 

LEGEND

FLA

Ð Full Load Amps

HACR

Ð Heating, Air Conditioning and Refrigeration

IFM

Ð Indoor (Evaporator) Fan Motor

LRA

Ð Locked Rotor Amps

MCA

Ð Minimum Circuit Amps

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage = 452 + 464 + 455

MOCP Ð Maximum Overcurrent Protection

NEC

Ð National Electrical Code

OFM

Ð Outdoor (Condenser) Fan Motor

RLA

Ð Rated Load Amps

UL

Ð Underwriters' Laboratories

=

3

1371

3

*Used to determine minimum disconnect size per NEC. ²Fuse or HACR circuit breaker.

= 457

NOTE: The 575-v 48TJ008-014 units are UL, Canada, only.

Determine maximum deviation from average voltage. (AB) 457 - 452 = 5 v

(BC) 464 - 457 = 7 v

(AC) 457 - 455 = 2 v Maximum deviation is 7 v.

Determine percent voltage imbalance.

NOTES:

1. In compliance with NEC requirements for multimotor and combi-

% Voltage Imbalance = 100 x

7

nation load equipment (refer to NEC Articles 430 and 440), the

overcurrent protective device for the unit shall be fuse or HACR

breaker. Canadian units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percent voltage imbalance.

% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

 

average voltage

 

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

9

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Carrier 48TJE008-014, 48TJD008-014, 48TJF008-012 installation instructions Electrical Data
Page 8 Page 10

48TJF008-012, 48TJD008-014, 48TJE008-014 specifications

Carrier's 48TJD008-014, 48TJE008-014, and 48TJF008-012 series are high-performance packaged rooftop units engineered to meet the heating, ventilation, and air conditioning (HVAC) needs of commercial and industrial applications. These units are renowned for their reliability, energy efficiency, and advanced technologies, making them a popular choice among facility managers and HVAC professionals.

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