Bryant LEGACY 580J*20M Series Installation Instructions Manual Download Page 1

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Installation Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Job-Site Survey

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Step 1 — Plan for Unit Location

. . . . . . . . . . . . . . . . . . . 10

Step 2 — Plan for Sequence of Unit

Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Step 3 — Inspect Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Step 4 — Provide Unit Support

. . . . . . . . . . . . . . . . . . . . 11

Step 5 — Field Fabricate Ductwork

. . . . . . . . . . . . . . . . . 16

Step 6 — Rig and Place Unit

. . . . . . . . . . . . . . . . . . . . . . 16

Step 7 — Install Outside Air Hood

. . . . . . . . . . . . . . . . . 17

Step 8 — Install Flue Hood and Combustion

Air Hood

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Step 9 — Install Gas Piping

. . . . . . . . . . . . . . . . . . . . . . . 18

Step 10 — Install External Condensate Trap

and Line

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Step 11 — Make Electrical Connections

. . . . . . . . . . . . . 20

Step 12 — Adjust Factory-Installed Options

. . . . . . . . . . 53

Step 13 — Install Accessories

. . . . . . . . . . . . . . . . . . . . . 53

Step 14 — Check Belt Tension

. . . . . . . . . . . . . . . . . . . . 53

Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . .CL-1

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, mainte-

nance, or use can cause explosion, fire, electrical shock or other

conditions which may cause 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 pack-

aged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloths for brazing operations and have a fire

extinguisher available. Read these instructions thoroughly and

follow all warnings or cautions attached to the unit. Consult local

building codes and appropriate national electrical codes (in

USA, ANSI/NFPA70, National Electrical Code (NEC); in

Canada, CSA C22.1) for special requirements.

It is important to recognize safety information. This is the

safety-alert symbol

. When you see this symbol on the unit

and in instructions or manuals, be alert to the potential for

personal injury.

Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. 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 personal injury or death.

CAUTION is used to identify unsafe practices, which may result

in minor personal injury or product and property damage. NOTE

is used to highlight suggestions which will result in enhanced

installation, reliability, or operation.

580J units for installation in the United States contain use of Bryant’s 2-speed indoor fan control system.
This complies with the U.S. Department of Energy (DOE) efficiency standard of 2018.
580J units for installation outside the United States may or may not contain use of the 2-speed indoor fan
control system as they are not required to comply with the U.S. Department of Energy (DOE) efficiency
standard of 2018.
For specific details on operation of the Bryant 2-speed indoor fan system refer to the Variable Frequency
Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, and Troubleshooting
manual.

WARNING

Failure to follow this warning could result in personal

injury or death. Disconnect gas piping from unit when leak

testing at pressure greater than 0.5 psig (3450 Pa). Pres-

sures greater than 0.5 psig (3450 Pa) will cause gas valve

damage resulting in hazardous condition. If gas valve is

subjected to pressure greater than 0.5 psig (3450 Pa), it

must be replaced before use. When pressure testing field-

supplied gas piping at pressures of 0.5 psig (3450 Pa) or

less, a unit connected to such piping must be isolated by

closing the manual gas valve.

WARNING