Bryant 549C manual Table of Contents

TABLE OF CONTENTS

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . 4,5

ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

548F

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,15

Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,17

Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-54

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-64

Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . 65-67

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69-72

549B, 549C

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73-75

Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 76-78

Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 79-80

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82-118

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119-130

Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . 131-133

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .134

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 135-139

542J

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 142-144

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146-152

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153

Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . 154-156

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .157

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 158-162

Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163,164

Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165-168

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

DURABLE, DEPENDABLE CONSTRUCTION — Designed for durability in any climate, the weather-resistant cabinets are constructed of galvanized steel and bonderized, and all exterior panels are coated with a prepainted baked enamel finish. The paint finish is non-chalking, and is capable of withstanding ASTM (American Society for Testing and Materials) B117 500-hour Salt Spray Test. All internal cabinet panels are primed, permitting longer life and a more attractive appearance for the entire unit.

In addition, all size 024-120 units are designed with a single, continuous top piece to eliminate any possible leaks. Totally enclosed outdoor-fan motors and permanently lubricated bear- ings provide additional unit dependability.

Patented State-of-the-Art Chronotemp™ Defrost System uses time and temperature to keep the outdoor coil frost-free for economical, dependable operation. The Chronotemp defrost board can be easily configured for defrost cycles every 30, 50, or 90 minutes.

Dependable 4-Way Valve Operation safely and efficiently accomplishes cycle reversals, defrost, and normal operation.

EASY INSTALLATION AND CONVERSION

All Units are Shipped in the Vertical Duct Configuration for fit-up to standard roof curbs. (3 different curb sizes fit unit sizes 024-072,090-120, and 150,180 respectively.) The contractor

can order and install the roof curb early in the construction stage, before decisions on size requirements are made.

All units feature a base rail design with forklift slots and rigging holes for easier maneuvering. Durable packaging protects all units during shipment and storage.

The units can be easily converted from a vertical to a horizontal duct configuration by relocating the panels supplied with the unit.

To Convert 024-120 Units from vertical to horizontal discharge, simply relocate 2 panels. The same basic unit can be used for a variety of applications and can be quickly modified at the jobsite.

To Convert Size 150 and 180 Units from vertical to horizontal discharge, use the optional horizontal supply/return adapter roof curb.

Convenient Duct Openings in the unit basepans permit side- by-side or concentric duct connections (see Application Data section) without requiring internal unit modification (size 150,180 only).

NOTE: On units using horizontal supply and return, the acces- sory barometric relief or power exhaust MUST be installed on the return ductwork.

Thru-the-bottom service connection capability comes standard with the rooftop unit to allow power and control wiring to be routed through the unit’s basepan, thereby minimizing roof pen- etrations (to prevent water leaks). Power and control connec- tions are made on the same side of the unit to simplify installation.

The Non-Corrosive Sloped Condensate Drain Pan permits either an external horizontal side condensate drain (outside the roof curb) or an internal vertical bottom drain (inside the roof curb). Both options require an external, field-suppliedP-trap.

Standard 2-in. Throwaway Filters are easily accessed through a removable panel located above the air intake hood. No tools are required to change unit filters.

All 024-120 Units are Designed With a Single, Continuous Top Piece to eliminate leaking at the seams or gasketing.

Belt-Driven Indoor-Fan Motors allow maximum on-site flexi- bility without changing motors or drives.

Field-Installed Accessory Electric heaters are available in a wide range of capacities. An available single-point wiring kit makes installation simple.

Low Voltage Wiring Connections are easily made due to the large terminal board which is located for quick, convenient access.

In addition, color-coded wires permit easy tracing and diagnostics.

PROVEN COMPRESSOR RELIABILITY

Design techniques feature computer-programmed balance between compressor, condenser, and evaporator. Bryant-specified hermetic compressors are equipped with compressor overcurrent and overtemperature protection to ensure dependability.

All units have a fixed orifice metering device which precisely controls refrigerant flow, preventing slugging and flood-back, while maintaining optimum unit performance. Refrigerant filter driers are standard.

Standard Low Ambient Cooling Operation to 25 F; optional head pressure control kit available for outdoor ambient condi- tions to –20 F.

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