Carrier 50ZHA024-060 User Manual

Page 5

Step 7—Install Electrical Connections

ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground may
consist of an electrical wire connected to the unit ground in
the control compartment, or conduit approved for electrical
ground when installed in accordance with NEC (National
Electrical Code), ANSI (American National Standards
Institute)/NFPA (latest edition) (in Canada, Canadian Elec-
trical Code CSA C22.1) and local electrical codes.

UNIT DAMAGE HAZARD
Failure to follow these precautions may result in damage to
the unit being installed:
1. Make all electrical connections in accordance with NEC

ANSI/NFPA (latest edition) and local electrical codes
governing such wiring. In Canada, all electrical connec-
tions must be in accordance with CSA standard C22.1
Canadian Electrical Code Part 1 and applicable local
codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between

field-supplied electrical disconnect switch and unit. DO
NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within operating

voltage range indicated on unit rating plate.

4. Insulate low-voltage wires for highest voltage contained

within conduit when low-voltage control wires are run in
same conduit as high-voltage wires.

5. Do not damage internal components when drilling through

any panel to mount electrical hardware, conduit, etc.
Consult local power company for correction of improper
voltage.

HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a field-
supplied, waterproof disconnect switch mounted at, or within sight
from the unit. Refer to the unit rating plate for maximum
fuse/circuit breaker size and minimum circuit amps (ampacity) for
wire sizing. See Table 6 for electrical data.

The field-supplied disconnect may be mounted on the unit over the
high-voltage inlet hole. (See Fig. 2.)

Table 2—Physical Data

UNIT 50ZHA

024

030

036

042

048

060

OPERATING WEIGHT (lbs)

293

324

377

389

384

433

COMPRESSOR TYPE

Scroll

Ultra Tech Scroll

REFRIGERANT Charge (lb)

R-22

7.5

10.3

11.9

11.4

13.3

REFRIGERANT METERING DEVICE

Orifice ID (in.)

Accurater

TXV

.067

.082

.086

—

Orifice OD (in.)

.049

.057

.059

.063

.070

.073

CONDENSER COIL

Rows...Fins/in.

Face Area (sq. ft.)

Copper Tubes, Aluminum Plate Fins

2...21

11.1

2...21

12.7

2...21

15.8

2...21

15.8

2...21

13.3

2...21

15.8

CONDENSER FAN

Nominal Cfm

Diameter (in.)

Motor HP (RPM)

Propeller

2600

1/8 (825)

2600

1/8 (825)

3200

1/4 (1100)

3200

1/4 (1100)

3200

1/4 (1100)

3300

1/2 (1100)

EVAPORATOR COIL

Face Area (sq. ft.)

Copper Tubes, Aluminum Plate Fins

3...17

4.3

3...17

4.9

4...17

4.9

4...17

6.1

4...17

4.9

4...17

6.1

Evaporator Blower

Nominal Airflow (CFM)

Size (in.)

Motor HP (RPM)

Direct Drive

800

10 x 8

1/2 (1050)

1000

10 x 8

1/2 (1050)

1200

11 x 9

3/4 (1050)

1400

11 x 9

3/4 (1050)

1600

11 x 10

1 (1050)

1875

11 x 10

1 (1050)

CONNECTING DUCT SIZES

Supply Air (in.)

Return Air (in.)

Round

Return-Air Filters (in.)*

Throwaway

24 x 24

24 x 30

30 x 30

*Required filter sizes shown are based on the ARI (Air Conditioning and Refrigeration Institute) rated airflow at a velocity of 300 ft/min for throwaway type or 450 ft/min

for high capacity type. Recommended filters are 1-in. thick.