Bryant 581B - Manual

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Page 2 – Fig. 2 — Base Unit Dimensions
Page 4 – Fig. 4 — Roof Curb Dimensions
Page 5 – II. UNIT DUCT CONNECTIONS; Connection must be made to roof curb before unit is; III. RIG AND PLACE UNIT; If unit has forklift protection skids, be sure to; operating weights with an economizer.; Fig. 6 — Rigging Details; MAXIMUM ALLOWABLE; Fig. 5 — Unit Leveling Tolerances
Page 6 – Table 1 — Specifications
Page 7 – LEGEND
Page 8 – NOMINAL; For example: A 115,000 Btuh input unit equals 115 cubic ft per hour or; Fig. 11 — Sediment Trap
Page 10 – Fig. 13 — Power Wiring Connections; Field Wiring; Fig. 14 — Low-Voltage Connections With or; RACEWAY; Contactor
Page 12 – Table 4 — Thermostat List*
Page 14 – Determine — Setting — 5 in.; Fig. 22 — Varislide Economizer Minimum Position Setting
Page 15 – Control Installation; Fig. 24 — Wiring Connections for Outdoor-Air
Page 16 – CONTROL; Fig. 28 — Panels Reinstalled On Unit
Page 19 – Table 5 — Rated Gas Inputs at Indicated Manifold Pressures; †Orifices are available through your local distributor or branch.; Fig. 31 — Burner Tray Details
Page 29 – Refer to Optional Economizer sections on pages 13 and 14.; FAN HEIGHT
Page 31 – Table 17 — LED Error Code Description*
Page 32 – Remove the 2 screws that attach the burner rack to the; B. Cleaning and Adjustment; Remove burner rack from unit as described in Removal; XI. REPLACEMENT PARTS
Page 34 – Table 20 — Cooling Service Analysis
Page 35 – Table 21 — VarislideTM Economizer Troubleshooting
Page 36 – Table 22 — PARABLADE Economizer Troubleshooting; PROBLEM
Page 37 – Fig. 45 — Typical Wiring Schematic and Component Arrangement

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IMPORTANT — READ BEFORE INSTALLING

1. Read and become familiar with these installation in-

structions before installing this unit (Fig. 1).

2. Be sure the installation conforms to all applicable local

and national codes.

3. These instructions contain important information for the

proper maintenance and repair of this equipment. Re-
tain these instructions for future use.

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . . . . . 1,2

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

I. Locate the Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

II. Unit Duct Connections

. . . . . . . . . . . . . . . . . . . . . . 5

III. Rig and Place Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . 5

IV. Field Connections

. . . . . . . . . . . . . . . . . . . . . . . . . . 7

PRE-START-UP

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

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-27

I. Compressor Rotation

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

II. Heating Section Start-Up and Adjustments

. . . . 18

III. Cooling Section Start-Up and Adjustments

. . . . 21

IV. Indoor Airflow and Airflow Adjustments

. . . . . . . 22

CARE AND MAINTENANCE

. . . . . . . . . . . . . . . . . . . . . . . 28

I. Air Filter

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-32

I. Cleaning

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

II. Lubrication

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

III. Condenser-Fan Adjustment

. . . . . . . . . . . . . . . . . 29

IV. Economizer Adjustment

. . . . . . . . . . . . . . . . . . . . 29

V. Refrigerant Charge

. . . . . . . . . . . . . . . . . . . . . . . . . 29

VI. Main Burners

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

VII. Flue Gas Passageways

. . . . . . . . . . . . . . . . . . . . . 30

VIII. Combustion-Air Blower

. . . . . . . . . . . . . . . . . . . . . 30

IX. Limit Switch

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

X. Burner Ignition

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

XI. Replacement Parts

. . . . . . . . . . . . . . . . . . . . . . . . . 32

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . 33-36

START-UP CHECKLIST

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

SAFETY CONSIDERATIONS

WARNING:

Improper installation, adjustment, alter-

ation, service, maintenance, or use can cause carbon mon-
oxide poisoning, explosion, fire, electric shock, or
other occurrences which may injure you or damage your
property. Consult a qualified installer, service agency,
or the gas supplier for information or assistance. The
qualified installer or agency must use only factory-
authorized kits or accessories when modifying this
product.

Recognize safety information. This is the safety-alert sym-
bol. (

) When you see this symbol on the unit and in in-

structions or manuals, be alert to the potential for personal
injury.

Understand the 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 indicates
a condition that could result in personal injury. Caution is
used to identify unsafe practices which would result in minor
personal injury or product and property damage.

WARNING:

Disconnect gas piping from unit when leak

testing at pressure greater than 0.5 psig. Pressures
greater than 0.5 psig will cause gas valve damage re-
sulting in hazardous condition. If gas valve is subject
to pressure greater than 0.5 psig, it must be replaced
before use. When pressure testing field-supplied gas pip-
ing at pressures of 0.5 psig or less, a unit connected to
such piping must be isolated by manually closing the
gas valve.

WARNING:

Before performing service or mainte-

nance operations on unit, turn off main power switch
to unit. Electrical shock could cause personal injury.

1. The power supply (volts, hertz, and phase) must corre-

spond to that specified on unit rating plate.

2. The electrical supply provided by the utility must be suf-

ficient to handle load imposed by this unit.

3. Refer to the Locate the Unit section on page 3 and

Fig. 2 for locations of gas and electrical inlets, conden-
sate drain, duct connections, and required clearances be-
fore setting unit in place.

4. Locate the unit where the vent cap will be a minimum

of 4 ft from openable windows or doors.

5. This installation must conform with local building codes,

the NFGC (National Fuel Gas Code), ANSI (American
National Standards Institute) Z223.1-1992, and NFPA
(National Fire Protection Association) 54 TIA-54-92-1.
In Canada, installation must conform with CAN/CGA
(Canadian Gas Association) B149.1,[2]-M86. Refer to Pro-
vincial and local plumbing or wastewater codes and other
applicable local codes.

6. Approved for outdoor installation on wood flooring or on

class A, B, or C roof-covering materials.

Fig. 1 — Typical Unit

installation, start-up
and service instructions

SINGLE PACKAGE ROOFTOP
GAS HEATING/ELECTRIC COOLING UNITS

581B

Sizes 036-072

3 to 6 Tons

Cancels: II 581B-36-1

II 581B-36-2

9/15/98

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Summary

Page 2 - Fig. 2 — Base Unit Dimensions

UNIT 581B STANDARD UNIT WEIGHT VARISLIDE™ ECONOMIZER WEIGHT CORNER WEIGHT ‘‘A’’ CORNER WEIGHT ‘‘B’’ CORNER WEIGHT ‘‘C’’ CORNER WEIGHT ‘‘D’’ Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg 036 530 240 34 15.4 127 57.6 122 55.3 138 62.6 143 64.9 048 540 245 34 15.4 129 58.5 124 56.2 141 64.0 146 66.2 060 560 254 ...

Page 4 - Fig. 4 — Roof Curb Dimensions

Fig. 4 — Roof Curb Dimensions ROOF CURB ACCESSORY ‘‘A’’ UNIT SIZE CRRFCURB001A00 14 9 [356] 581B036-072 CRRFCURB002A00 24 9 [610] NOTES:1. Roof curb accessory is shipped disassembled. 2. Insulated panels.3. Dimensions in [ ] are in millimeters. 4. Roof curb: galvanized steel.5. Attach ductwork to cu...

Page 5 - II. UNIT DUCT CONNECTIONS; Connection must be made to roof curb before unit is; III. RIG AND PLACE UNIT; If unit has forklift protection skids, be sure to; operating weights with an economizer.; Fig. 6 — Rigging Details; MAXIMUM ALLOWABLE; Fig. 5 — Unit Leveling Tolerances

II. UNIT DUCT CONNECTIONS On vertical units, secure all ducts to roof curb and buildingstructure. Do not connect ductwork to unit. On horizontal units,duct flanges should be attached to horizontal openings andall ductwork should be secured to flanges. Insulate and weath-erproof all external ductwork...