Bryant 393AAV - Manual

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Page 2 – AIR FLOW
Page 4 – Fig. 4–Cleaning Heat Exchanger Cell
Page 6 – Fig. 6—Furnace Control
Page 7 – Fig. 7—Unit Wiring Diagram; PCB
Page 8 – SERVICE; LED CODE; CONTINUOUS OFF - Check for 115VAC at L1 and L2, and 24VAC at SEC-1 and
Page 9 – WIRING DIAGRAMS
Page 10 – Troubleshooting Guide
Page 12 – SERVICE TRAINING; • Unit Familiarization

Loading the manual

NOTE:

Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

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

INTRODUCTION ..........................................................................2

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PRO-
CEDURE ........................................................................................2

CARE AND MAINTENANCE .....................................................2

Cleaning and/or Replacing Air Filter.......................................2
Blower Motor and Wheel .........................................................3
Cleaning Heat Exchanger .........................................................4
Electrical Controls and Wiring.................................................5

WIRING DIAGRAMS...................................................................9

Troubleshooting ..............................................................................9

SAFETY CONSIDERATIONS

Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating 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
heating equipment, observe precautions in the literature, tags, and
labels attached to or shipped with the unit and other safety
precautions that may apply.

Follow all safety codes. In the United States, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA No.
54-1999/ANSI Z223.1-1999 and the Installation Standards Warm
Air Heating and Air Conditioning Systems (NFPA 90B)
ANSI/NFPA 90B. In Canada, refer to the current edition of the
National Standard of Canada CAN/CGA-B149.1- and .2-M95
Natural Gas and Propane Gas Installation Codes (NSCNGPIC).
Wear safety glasses and work gloves. Have fire extinguisher
available during start-up and adjustment procedures and service
calls.

Recognize safety information. This is the safety-alert symbol

When you see this symbol on the furnace and in instructions or
manuals, 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 personal injury or death. CAUTION is used
to identify unsafe practices which would 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

WARNING:

The ability to properly perform mainte-

nance on this equipment requires certain expertise, me-
chanical skills, tools, and equipment. If you do not
possess these, do not attempt to perform any maintenance
on this equipment other than those procedures recom-
mended in the User’s Manual. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN POSSIBLE
DAMAGE TO THIS EQUIPMENT, SERIOUS PER-
SONAL INJURY, OR DEATH.

Fig. 1—Model 393AAV Upflow Furnace

A94085

REGISTERED QUALITY SYSTEM

rie

r Corporat

IST

E R E D F

9001 #A28

EFFICIENCY

RATING

CERTIFIED

Service and
Maintenance Procedures

GAS-FIRED
INDUCED-COMBUSTION FURNACE

Cancels:

SP04-58

SP04-61

10-00

393AAV

Series B&C

—1—

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Summary

Page 2 - AIR FLOW

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper anddangerous operation. INTRODUCTION These instructions are written for the Gas-Fired Induced Combus-tion Furnace. ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE CAUTION: Electrostatic disc...

Page 4 - Fig. 4–Cleaning Heat Exchanger Cell

WARNING: Blower access door switch opens 115-v power to control center. No component operation canoccur. Caution must be taken when manually closing thisswitch for service purposes. Failure to follow this warn-ing could result in electrical shock, personal injury, ordeath. NOTE: If thermostat termin...

Page 6 - Fig. 6—Furnace Control

The 24-v circuit contains an automotive-type, 3-amp fuse locatedon the control. (See Fig. 6.) Any shorts of the 24-v wiring duringinstallation, service, or maintenance will cause this fuse to blow. Iffuse replacement is required, use ONLY a 3-amp fuse. The controlLED will display status code 24 when...