Carrier 50AH024-096 User Manual

Horizontal Indoor Single-Package Cooling Units

with PURON® Refrigerant (R-410A)

Installation, Start-Up, and

Service Instructions

ROOMTOP

50AH024-096

®

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Step 1 — Receive and Inspect Unit. . . . . . . . . . . . . . . 1

Step 2 — Protect Unit from Damage . . . . . . . . . . . . . . 1

Step 3 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1

Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 8

Step 5 — Make Condensate Piping

Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Step 6 — Install Ductwork. . . . . . . . . . . . . . . . . . . . . . . . 8

Step 7 — Split Systems (Factory Option,

if Required). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Step 8 — Make Electrical Connections . . . . . . . . . . 10

• FIELD CONTROL WIRING

• THERMOSTAT WIRE

Step 9 — Adjust Fan Speed . . . . . . . . . . . . . . . . . . . . . 10

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17,18

SAFETY CONSIDERATIONS

Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install,
repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func­tions such as cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per­sonnel. When working on air-conditioning equipment, observe
precautions in the literature and on tags and labels attached to
unit.

Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available.

WARNING

Disconnect all power to the unit before performing mainte­nance or service. Electrical shock and personal injury could
result.

NOTE: Ensure voltage on unit agrees with voltage listed on
the unit rating plate.

GENERAL

The 50AH024-096 units are single-package, indoor, hori­zontally mounted air conditioners of 2 to 8 tons capacity. The
50AH units are ASHRAE (American Society of Heating, Re­frigerating and Air Conditioning Engineers) 90.1 compliant.

These units can be mounted as factory-shipped single­package units or can be separated and mounted as a split

system. If unit is split, the condensing section must be mounted
horizontally.

All units are designed to be ducted on both the condenser
and evaporator sides. Centrifugal blowers are used to ensure
quiet air delivery to the conditioned space. Sound level
requirements should be determined before final unit installa­tion site is chosen.

Unit servicing is relatively simple since access to the con­denser and evaporator motors, blowers, belt, and pulley is
gained through access panels located on the sides of the unit.
These panels may also be used for cleaning of condenser coils.
Unit side panels also provide access to control box and pres­sure switches.

Refrigeration cycle components (e.g., compressor, filter
drier, etc.) can be serviced upon removal of the base unit from
the space.

INSTALLATION

WARNING

Determine building alterations required to run piping, wir­ing, and ductwork. Follow dimensional drawings carefully
for ductwork, piping locations, electrical wiring, and over­all unit dimensions. Read all installation instructions before
starting installation.

The 50AH units are intended for indoor installation only.

Step 1 — Receive and Inspect Unit — Unpack and

check unit against shipping order. See Fig. 1 for model number
nomenclature. Inspect carefully for concealed shipping dam­age. If unit is damaged or incomplete, file claim with transpor-
tation company and advise Carrier immediately.

Step 2 — Protect Unit from Damage — To main-

tain warranty, unit must be protected against theft and vandal­ism and stored indoors at all times.

Step 3 — Provide Unit Support — Refer to Fig. 2-5

for unit dimensions. Refer to Table 1 for unit sizes and weights.

Each unit requires the following field-supplied items:

8 — threaded suspension rods (

minimum), 4 additional rods are needed if the unit

has a factory-installed air-side economizer
8—washers
8 — locknuts

Install the 8 field-supplied rods by suspending them from a

suitable ceiling support. Locate rods to mate with 8 outside cor­ner rigging holes shown in Fig. 2-5. Unit center of gravity is
shown in Fig. 6.

The ceiling and ceiling supports of existing buildings may

require reinforcements; follow all applicable codes.

3

/8-in.-16 SAE Grade 1

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53500057-01 Printed in U.S.A. Form 50AH-14SI Pg 1 5-10 Replaces: 50AH-12SI

Evaporator Configuration

Factory-Installed Options

50AH AC 048 5 – – – – 2 1 XX

50AH – Horizontal, Indoor

Single-Package Cooling Unit

Packaging
1 – Domestic
2 – Export

Voltage Description

5 – 208/230-3-60
6 – 460-3-60

Unit Size - Nominal Tons
024 –2
036 – 3
048 – 4

Compressor Options
AC – Air Cooled

060 –5
072 – 6
096 – 8

3 – 208/230-1-60

Condenser Configuration

Design Changes
2 – R-410A Original Design

Cabinet Type

S – Splittable*

– – Standard

Economizer and Hot Gas Options

A – Hot Gas Bypass†
B – Hot Gas Reheat†

– – None

C – Air-S

ide Economizer with Controls

E – Hot Gas Bypass and Air-Side Economizer†
F – Hot Gas Bypass, Air-Side Economizer, and

Hot Gas Reheat†

D – Hot Gas Bypass and Hot Gas Reheat†

G – Hot Gas Reheat and Air-Side Economizer†

B – Standard Motor with Alternate 2 Drive

A – Standard Motor with Alternate 1 Drive

– – Standard Motor with Standard Drive

E – Upgrade 1 Motor with Alternate 2 Drive

D – Upgrade 1 Motor with Alternate 1 Drive

C – Upgrade 1 Motor with St

andard Drive

H – Upgrade 3 Motor with Alternate 2 Drive

G – Upgrade 2 Motor with Alternate 2 Drive

F – Upgrade 2 Motor with Alternate 1 Drive

B – Standard Motor with Alternate 1 Drive

A – Standard Motor with Standard Drive, Flooded Condenser

– – Standard Motor with Standard Drive

E – Upgrade 1 Motor with Alternate 3 Drive

D – Upgrade 1 Motor with Alternate 2 Drive

C – Upgrade 1 Motor with Alternate 1 Drive

H – Upgrade 2 Motor with Alternate 3 Drive

G – Upgrade 2 Motor with Alternate 2 Drive

F – Upgra

de 2 Motor with Alternate1 Drive

J – Standard Motor with Alternate 1 Drive, Flooded Condenser

M – Upgrade 1 Motor with Alternate 3 Drive, Flooded Condenser

L – Upgrade 1 Motor with Alternate 2 Drive, Flooded Condenser

K – Upgrade 1 Motor with Alternate 1 Drive, Flooded Condenser

Q – Upgrade 2 Motor with Alternate 3 Drive, Flooded Condenser

P – Upgrade 2 Motor with Alternate 2 Drive, Flooded Condenser

N – Upgrade 2 Motor with Alternate1 Drive, Flooded Condenser

* Includes interconnecting kit and electrical box.
†Not available with splitable units.

a50-8546

Fig. 1 — Model Number Nomenclature

2

DETAIL A

CLEARANCE HOLE FOR

3/8" HANGING ROD

TYP 8 PLS

AIR

IN

COIL

ACCESS

FRONT

TOP

RIGHT

REAR LEFT

RETURN

AIR

SUPPLY

AIR

AIR

OUT

MOTOR

ACCESS

ELECT

BOX

ACCESS

BLOWER

ACCESS

EVAP

SECTION

COND

SECTION

ISOMETRIC VIEW

MOTOR

ACCESS

DETAIL "A"

ELECTRICAL

CONNECTIONS

TYP

CONDENSATE DRAIN

7/8" OD

FILTER

ACCESS

COMPRESSOR

ACCESS

QUICK

CONNECT

ACCESS

RA

LEFT

RIGHT

REAR

FRONT

26 IN. SERVICE

CLEARANCE

36 IN. SERVICE

CLEARANCE

31

90

6 7/16

13 5/8

34 3/4

1 3/8

9 5/16

12 3/8

60

24

3 3/4

3 13/16

33

2

28

64 1/2

6 1/8

18 3/4

1 3/4

16 1/8

48

42

2 1/4

3 1/2

62

1 15/16

38 1/8

3 7/8

44 1/8

1

1

1

A

B

C

DEG

FH

OSA

OPERATING WEIGHT DISTRIBUTION

UNIT

50AH

WEIGHT OF CORNER (lb)

ABCDEFGH

024 8711188 113 143 136 105 100

036 8711189 114 144 138 106 101

048 91 116 92 118 152 145 111 106

060 91 117 93 119 153 146 112 107

Fig. 2 — Unit Dimensions — 50AH024-060 Standard Units

NOTE: Dimensions are in inches.

a50-8547

LEGEND

OSA — Outside Supply Air

RA — Return Air

3

64 1/2

6 1/8

183/4

1 3/4

16 1/

8

1 1/2

3 13/16

1 15/16

44 1/8

3 7/8

38 1/8

6 1/16

24 3/4

38 1/2

5 15/16

3 1/4

1/4

5 7/

8

13 5/8

9 5/16

12 3/

8

6 7/16

2 1/4

5 7/8

12

Fig. 3 — Unit Dimensions — 50AH024-060 Units with Factory-Installed Air-Side Economizer

a50-8548

NOTES:

1. Dimensions are in inches.

2. Economizer weight is 180 lb.

LEGEND

OSA — Outside Supply Air

RA — Return Air

4

DETAIL A

CLEARANCE HOLE FOR

3/8" HANGING ROD

TYP 8 PLS

DETAIL "A"

AIR

IN

MOTOR

ACC

ELECT

BOX

ACCESS

COIL

ACCESS

COMPRESSOR

ACCESS

FILTER

ACCESS

CONDENSATE DRAIN

7/8" OD

FRONT

TOP

RIGHT

REAR LEFT

RETURN

AIR

SUPPLY

AIR

AIR

OUT

MOTOR

ACCESS

ELECT

BOX

ACCESS

BLOWER

ACCESS

QUICK

CONNECT

ACCESS

EVAP

SECTION

COND

SECTION

ELECTRICAL

CONNECTIONS

TYP

ISOMETRIC VIEW

21 7/16

22 1/8

18 15/16

10 7/8

32

112

25

3 5/8

39

1 1/4

16 1/16

6 7/16

18 3/4

6

70 1/2

29

653

2

2 1/4

3 1/2

47

65

72 1/2

1 15/16

43 1/8

3 7/8

61 1/8

75

26 IN. SERVICE

CLEARANCE

36 IN. SERVICE

CLEARANCE

36 IN. SERVICE

CLEARANCE

1

1

1

A

B

C

DEG

F

H

OSA

RA

REAR

RIGHT

LEFT

FRONT

OPERATING WEIGHT DISTRIBUTION

UNIT

50AH

WEIGHT OF CORNER (lb)

ABCDEFGH

072 125 128 149 152 126 128 188 192

096 126 129 149 153 139 142 208 212

NOTE: Dimensions are in inches.

a50-8549

Fig. 4 — Unit Dimensions — 50AH072,096 Standard Units

LEGEND

OSA — Outside Supply Air

RA — Return Air

5

13 7/16

16 1/16

6 7/16

18 3/4

6 5/8

70 1/2

5 7/8

22 1/8 21 7/16

18 15/16

10 7/8

3 1/4

5 15/16

1 1/2

72 1/2

1 15/16 61 1/8

3 7/8

43 1/8

6 1/16

42 1/2

29 3/4

12

NOTES:

1. Dimensions are in inches.

2. Economizer weight is 200 lbs.

a50-8550

Fig. 5 — Unit Dimensions — 50AH072,096 Units with Factory-Installed Air-Side Economizer

LEGEND

OSA — Outside Supply Air

RA — Return Air

6