Carrier 48ES---A User Manual

Carrier Conditioners

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48ES---A

Comfort t 13 SEER Single---Packaged Air Conditioner

and Gas Furnace System with Puron® (R---410A) Refrigerant

Single and Three Phase

2---5 Nominal Tons (Sizes 24---60)

Installation Instructions

NOTE:

Read the entire instruction manual before starting the

installation.
NOTE:

Installer: Make sure the Owner’s Manual and Service

Instructions are left with the unit after installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS

1

. . . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RECEIVING AND INSTALLATION

2--13

. . . . . . . . . . . . . . . . .

Check Equipment

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identify Unit

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspect Shipment

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Unit Support

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Roof Curb

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Fabricate Ductwork

6

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Clearances

6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rig and Place Unit

6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection

6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rigging/Lifting

6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect Condensate Drain

9

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Flue Hood

9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Gas Piping

9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Duct Connections

10

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring Units for Downflow (Vertical)

Discharge

10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Electrical Connections

12

. . . . . . . . . . . . . . . . . . . . . . . .

High--Voltage Connections

12

. . . . . . . . . . . . . . . . . . . . . . . .

Special Procedures for 208--V Operation

12

. . . . . . . . . . . . . .

Control Voltage Connections

12

. . . . . . . . . . . . . . . . . . . . . . .

Standard Connection

12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heat Anticipator Setting

13

. . . . . . . . . . . . . . . . . . . . . . . . . .

Transformer Protection

13

. . . . . . . . . . . . . . . . . . . . . . . . . . .

PRE--START--UP

13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP

14--22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check for Refrigerant Leaks

13

. . . . . . . . . . . . . . . . . . . . . . . . .

Start--Up Heating & Make Adjustments

14

. . . . . . . . . . . . . . . .

Check Heating Control

14

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Gas Input

14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjust Gas Input

15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Burner Flame

16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Normal Operation

20

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Airflow and Temperature Rise

20

. . . . . . . . . . . . . . . . . . . . . .

Heating Sequence of Operation

20

. . . . . . . . . . . . . . . . . . . . .

Limit Switches

20

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rollout Switch

20

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start--Up Cooling & Make Adjustments

20

. . . . . . . . . . . . . . . .

Checking Cooling Control Operation

20

. . . . . . . . . . . . . . . .

Checking & Adjusting Refrigerant Charge

20

. . . . . . . . . . . .

Indoor Airflow and Airflow Adjustments

21

. . . . . . . . . . . . .

Continuous Fan Operation

21

. . . . . . . . . . . . . . . . . . . . . . . .

Cooling Sequence of Operation

22

. . . . . . . . . . . . . . . . . . . . .

MAINTENANCE

29--30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Filter

29

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A09034

Fig. 1 -- Unit 48ES--A

(Low NOx Model Available)

Indoor Blower and Motor

29

. . . . . . . . . . . . . . . . . . . . . . . . .

Induced Draft (Combustion Air) Blower

30

. . . . . . . . . . . . . .

Flue Gas Passageways

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Limit Switch

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Burner Ignition

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Burners

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal of Gas Train

30

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Outdoor Coil, Indoor Coil, & Condensate Drain Pan

30

. . . .

Outdoor Fan

31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Controls and Wiring

32

. . . . . . . . . . . . . . . . . . . . .

Refrigerant Circuit

32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Input

32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Evaporator Airflow

32

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Puron Items

33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING

33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START--UP CHECKLIST

33

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service maintenance,
or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your

distributor or branch for information or assistance. The qualified

installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local

building codes, the current editions of the National Fuel Gas Code
(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code

(NEC) NFPA 70.
In Canada refer to the current editions of the National Standards of

Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane
Installation codes, and Canadian Electrical Code CSA C22.1

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