Bryant 345MAV User Manual

NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
Table of Contents Page
DIMENSIONAL DRAWING........................................................2
SAFETY CONSIDERATIONS.....................................................3
Clearances to Combustibles......................................................3
CODES AND STANDARDS........................................................4
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........5
INTRODUCTION..........................................................................5
APPLICATIONS............................................................................5
General ......................................................................................5
Upflow Applications.................................................................6
Downflow Applications............................................................7
Horizontal Left (Supply-Air Discharge) Applications ............9
Horizontal Right (Supply-Air Discharge) Applications ........11
LOCATION..................................................................................12
General ....................................................................................12
Furnace Location Relative to Cooling Equipment ................13
Hazardous Locations...............................................................13
AIR FOR COMBUSTION AND VENTILATION ....................13
General ....................................................................................13
Unconfined Space...................................................................14
Confined Space.......................................................................14
INSTALLATION.........................................................................15
Leveling Legs (If Desired).....................................................15
Installation In Upflow or Downflow Applications................17
Installation In Horizontal Applications..................................17
Air Ducts.................................................................................17
General Requirements .......................................................17
Ductwork Acoustical Treatment .......................................17
Supply Air Connections ....................................................17
Return Air Connections.....................................................18
Filter Arrangement ............................................................18
Bottom Closure Panel........................................................19
Gas Piping..........................................................................19
Electrical Connections ............................................................20
115-v Wiring......................................................................21
24-v Wiring........................................................................21
Accessories ........................................................................22
Venting....................................................................................22
Removal of Existing Furnaces from Common
Vent Systems.....................................................................22
Combustion-Air and Vent Piping .....................................23
Vent Termination...............................................................31
Multiventing.......................................................................31
Condensate Drain....................................................................31
General...............................................................................31
Application.........................................................................33
Condensate Drain Protection.............................................33
START-UP, ADJUSTMENTS AND
SAFETY CHECK...................................................................33
General...............................................................................33
Prime Condensate Trap With Water.................................34
Purge Gas Lines ................................................................34
Sequence of Operation ......................................................34
Heating Mode...............................................................34
Cooling Mode...............................................................35
Continuous Blower Mode............................................35
Heat Pump Mode .........................................................35
Component Test ...........................................................35
Adjustments .......................................................................36
Set Gas Input Rate.......................................................36
Set Temperature Rise...................................................40
Blower Off Delay (Heat Mode) ..................................41
Set Thermostat Heat Anticipator.................................41
Check Safety Controls.......................................................41
Check Primary Limit Control......................................41
A93040
Fig. 1—Multipoise Orientations
A93041
UPFLOW
DOWNFLOW
HORIZONTAL
LEFT
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
HORIZONTAL
RIGHT
ama
CERTIFIED
As an ENERGY STAR® Part-
ner, BRYANT Heating & Cool-
ing Systems Company has de-
termined that this product meets
the ENERGY STAR® guide-
lines for energy efficiency.
REGISTERED QUALITY SYSTEM
installation, start-up,
and operating instructions
4-WAY MULTIPOISE
FIXED-CAPACITY
CONDENSING GAS FURNACE
Cancels: II 345M-40-7 II 345M-40-8
12-03
345MAV
Series F
—1—

Bryant 345MAV Specifications

General

Brand	Bryant
Model	345MAV
Category	Furnace
Language	English

Summary

SAFETY CONSIDERATIONS

Clearances to Combustibles

Specifies required clearances from combustibles for safe installation.

CODES AND STANDARDS

Lists applicable national and local codes and installation standards.

ELECTROSTATIC DISCHARGE PRECAUTIONS

Details precautions to prevent damage to electronic control components.

APPLICATIONS AND LOCATION

Application Types

Covers upflow, downflow, and horizontal furnace orientations.

General Location Guidelines

Provides guidance on furnace placement within the building.

Combustion & Ventilation Air

Details requirements for combustion and ventilation air supply.

INSTALLATION PROCEDURES

General Installation Overview

Covers basic installation steps and components.

Furnace Orientations (Upflow, Downflow, Horizontal)

Specifics for installing the furnace in various orientations.

Utility Connections (Gas, Electrical, Venting)

Guides for connecting gas, electrical, and vent piping.

Condensate Drainage

Instructions for setting up the condensate trap and drain.

START-UP, ADJUSTMENTS AND SAFETY CHECKS

General Start-Up Procedures

Initial checks and procedures before furnace operation.

Furnace Adjustments

Covers setting gas input rate and temperature rise.

Thermostat Setup

Guidelines for setting the heat anticipator and cycle rate.

Safety Control Checks

Verifies operation of primary limit and pressure switch controls.

CHECKLISTS

Installation Checklist

A comprehensive list of items to verify during installation.

Start-Up Checklist

A list of essential checks for furnace start-up.