Carrier 48EZ(N)-A- User Manual

Carrier 48EZ(N)-A

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Table of Contents:

  • Page 2 – INTRODUCTION; Step 1 — Check Equipment; CAUTION; except
  • Page 5 – LARGE CURB; SMALL CURB; IMPORTANT
  • Page 6 – Step 3 — Field Fabricate Ductwork; Step 5 — Rig and Place Unit; PERSONAL INJURY OR PROPERTY DAMAGE; WARNING; Inspection
  • Page 7 – Step 6 — Connect Condensate Drain; Step 8 — Install Gas Piping
  • Page 8 – OUT
  • Page 9 – Step 9 — Install Duct Connections; Configuring Units for Downflow (Vertical) Discharge; ELECTRICAL SHOCK HAZARD; PROPERTY DAMAGE HAZARD; NOTE
  • Page 11 – Table 2 – Maximum Gas Flow Capacity*; Table 3 – Heating Inputs
  • Page 12 – Step 10 — Install Electrical Connections; Then
  • Page 13 – FIRE, EXPLOSION HAZARD
  • Page 14 – Step 1 — Check for Refrigerant Leaks; Step 2 — Unit Sequence of Operation; Heating Sequence of Operation; ments; UNIT COMPONENT DAMAGE HAZARD; Check Heating Control
  • Page 15 – Check Gas Input; UNIT DAMAGE HAZARD; Adjust Gas Input; Pipe Plug
  • Page 16 – FIRE AND UNIT DAMAGE HAZARD; Measure Manifold Pressure (Propane Units)
  • Page 17 – Checking and Adjusting Refrigerant Charge; Indoor Airflow and Airflow Adjustments; Gas Heating Fan Speed Set-up
  • Page 18 – Two Cooling Fan Speeds Set-up (Dehumidification; Continuous Fan Operation
  • Page 32 – MAINTENANCE; Air Filter
  • Page 34 – FEEDER TUBE; Outdoor Fan; UNIT OPERATION HAZARD; Electrical Controls and Wiring; Refrigerant Circuit
  • Page 35 – Gas Input
  • Page 37 – Accurater; LEGEND; Accurater; Refrigerant System
  • Page 38 – TROUBLESHOOTING
  • Page 39 – Table 12 – Troubleshooting Guide -- Cooling or Heat Pump Heating Mode
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1

48EZ(N) --- A

Comfort

t

13 SEER Single --- Packaged HYBRID HEAT

r

Dual Fuel 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--2

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

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

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

Connect Condensate Drain

7

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

Install Flue Hood

7

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

Install Gas Piping

7

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

Install Duct Connections

9

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

Configuring Units for Downflow (Vertical)

Discharge

9

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

Install Electrical Connections

12

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

High--Voltage Connections

12

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

Special Procedures for 208--V Operation

12

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

Control Voltage Connections

13

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

Balance Point Setting Thermidistat or Hybrid Heat

Thermostat

13

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

Transformer Protection

13

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

PRE--START--UP

13--14

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

START--UP

14--17

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

Check for Refrigerant Leaks

14

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

Unit Sequence of Operation

14

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

Start--Up Heating and Make Adjustments

14

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

Checking Heating Control

14

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

Check Gas Input

15

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

Adjust Gas Input

15

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

Check Burner Flame

16

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

Start--Up Cooling and Make Adjustments

16

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

Checking Cooling Control Operation

16

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

Checking and Adjusting Refrigerant

17

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

Indoor Airflow and Airflow Adjustments

17

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

MAINTENANCE

32--38

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

Air Filter

32

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

Indoor Blower and Motor

32

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

Flue Gas Passageways

33

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

Limit Switch

33

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

Burner Ignition

33

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

Main Burners

33

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

Outdoor Coil, Indoor Coil, & Condensate Drain Pan

33

. . . . . .

Outdoor Fan

34

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

Electrical Controls and Wiring

34

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

Refrigerant Circuit

34

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

A09034

Fig. 1 -- Unit 48EZ--A

Gas Input

35

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

Indoor Airflow

35

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

Check Defrost Thermostat

35

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

Puron

R

Items

35

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

TROUBLESHOOTING

38

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

START--UP CHECKLIST

38

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

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due

to mechanical and electrical components. Only trained and

qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions such

as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this

equipment, observe precautions in the literature, on tags, and on

labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have 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.

Recognize safety information. This is the safety--alert symbol

.

When you see this symbol on the unit and in instructions or manu-

als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These

words are used with the safety--alert symbol. DANGER identifies
the most serious hazards which

will

result in severe personal injury

or death. WARNING signifies hazards which

could

result in per-

sonal injury or death. CAUTION is used to identify unsafe practic-

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Summary

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