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Electrical connections – Carrier 06D User Manual

Page 4

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4

Install a solenoid valve (field supplied) in liquid line directly

before expansion valve. Solenoid valve is necessary for single
pumpout control used on 06D, 07D units. Refrigerant filter
drier and moisture indicator are shipped with 07D condensing
units for field installation. Install in liquid line according to
manufacturer’s instructions.

Relief valve located on top of condenser (07D units) will

open to relieve excessive pressure, allowing refrigerant to
escape. Most local codes require piping from safety device to
outdoors.

Refer to Carrier System Design Manual, Part 3, for standard

piping techniques.
COMPRESSOR UNITS — Connect high- and low-pressure
switch capillary tubes from control box to compressor. See
Fig. 2.

Install discharge line muffler (accessory) in discharge line

as close to compressor shutoff valve as possible.

Electrical Connections

UNBALANCED 3-PHASE SUPPLY VOLTAGE — Never
operate a motor where a phase imbalance in supply voltage
is greater than 2%.
Use the following formula to determine
the % voltage imbalance:
% Voltage Imbalance =

Example: Supply voltage is 230-3-60

AB = 236 volts
BC = 229 volts
AC = 234 volts

Determine maximum deviation from average voltage:

(AB) 236 – 233 = 3 volts
(BC) 233 – 229 = 4 volts
(AC) 234 – 233 = 1 volt

Maximum deviation is 4 volts. Determine % voltage
imbalance:

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

ELECTRICAL DATA NOTES

1. All 06D and 07D units are across-the-line start.
2. Wire sizes are based on TW type copper wire. Maximum

wire lengths based on data from Table 1 will result in a
1% voltage drop to compressor. Where up to 3% voltage
drop is allowed, the run length can be increased to 3 times
the length calculated from data in Table 1.

3. The 06D compressor unit electrical data shown in Table 1

does not apply for 06D compressors used as an integral
part of other Carrier equipment. See proper installation
book for electrical information.

WIRING — Power supply must correspond with unit name-
plate electrical characteristics (units are internally wired at
factory for nameplate voltage). Field wiring must comply with
local and national codes.

Install a branch circuit fused disconnect of adequate size to

handle starting current.
LINE POWER — Connect line power to the compressor con-
tactor C. For example, connect L1 to terminal 11, L2 to termi-
nal 12 and L3 to terminal 13. See Fig. 3.

Table 1 — Compressor Electrical Data

LEGEND

*Refer to physical data table to match compressor with correct com-

pressor unit or water-cooled condensing unit.

NOTES:

1. RLA (rated load amps) value shown is: MCC

÷ 1.40 = RLA.

2. For minimum contactor sizing, use RLA value determined by:

MCC

÷ 1.40 = RLA.

3. For wiring sizing, the RLA value can be determined by: MCC

÷ 1.56 = RLA.

4. Compressor operating amps at any specific conditions can only

be determined from a performance curve.

5. RLA values for 06D compressor protected by a calibrated

circuit breaker will depend on must-trip value of circuit breaker.

6. Ohm values shown for resistance are approximate and shown

for reference only. Motors from different vendors and motors of
different efficiencies can differ up to 15% from data shown.

7. Electrical data for compressor part numbers 06DR and

50 Hz models (not shown) are available from Carrier Sales
Representative.

100 x

max voltage deviation from average voltage

average voltage

Average Voltage =

236 + 229 + 234

= 233 volts

3

% Voltage Imbalance =100 x

4

= 1.7%

233

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

COMPRESSOR
PART NUMBER

06D*

VOLTAGE

(3 Ph-60 Hz)

HP

MCC

RLA

LRA

MOTOR WINDING

RESISTANCE

(Ohms)

M

808

575

3

7

5

28.4

5.0

208/230

17.4

12.4

71

0.78

460

8.7

6.2

35.5

3.1

313

575

5

10.8

7.7

40

3.3

208/230

27

19.3

100

0.5

460

13.5

9.6

50

2.1

A

818

575

6.5

17.6

12.6

64

2.6

208/230

44

31.4

160

0.42

460

22

15.7

80

1.7

825

575

7.5

22.2

15.9

79

2.0

208/230

55.5

39.6

198

0.31

460

27.8

19.8

99

1.3

328

575

10

25

17.9

91

1.7

208/230

62

44.3

228

0.26

460

31

22.1

114

1.0

537

575

15

32

22.9

96

1.2

208/230

89

63.6

266

0.18

460

40

28.6

120

0.72

LRA

Locked Rotor Amps

MCC — Maximum Continuous Current
RLA

Rated Load Amps