Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B, DuraPac Plus 581B User Manual

COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING UNITS

Dura

Model 581B

Pac

Plus Series

Sizes 036-150

3 to 121/2 Tons

Unit 581B036-072

Bryant has designed the DuraPac Plus series based on customer needs and requests to be the most efficient and reliable ever.

FEATURES/BENEFITS

• Efficient rooftop line for cooling using scroll compressor technology

• Efficient rooftop line for heating using dimpled heat exchangers

• High reliability — non-corrosive condensate pans, prepainted cabinets and primed interior panels, and all units are fully protected by internal safeties

• Quiet operation — isolated compressor plate. All compressors mounted on independent vibration isolators. Standard, belt-driven evaporator fan motors on all units

• Ease of maintenance achieved by self diagnostics on the Integrated Gas Controller (IGC), standard size filters, no tool filter access, simple compressor access, permanently lubricated fan motors, optional disconnect switch, optional hinged access panels, and optional 115-v convenience outlet

• Performance and comfort enhancing options — High-static motors and Perfect Humidity™ dehumidification package.

BRYANT MEANS TOP QUALITY AND RELIABILITY —

Each component utilized in the DuraPac Plus series is designed and tested for a minimum of 15 years operation under the harshest conditions.

Every unit is thoroughly run tested at the factory in each operating mode and evacuated prior to final charging. Every coil is leak-tested with helium particles. Automated run testing allows accurate undisputed tests and measurements which are second to none in the industry.

Each unit contains a factory printout indicating tested pressures, amperages, dates, and inspectors, providing certification of the unit’s status at the time of manufacture.

Units are equipped with valuable safety controls designed to monitor and protect for the life of the unit. The standard safeties include:

• low-pressure/loss-of-charge switch

Unit 581B090-150

• high-pressure switch

• freeze-protection thermostat

• internal compressor overload

• exclusive Cycle-LOC™ circuit board that prevents compressor cycling

• refrigerant filter drier

The cabinet is constructed of galvanized steel, bonderized and coated with a prepainted baked enamel finish. The paint finish is a non-chalking type, and is capable of exceeding Federal Test Method Standard No. 141 (Method 6061) 500-Hour Salt Spray Test. In addition, all cabinet interior surfaces are primed, allowing the entire unit to have a longer life and more attractive appearance.

EASY MAINTENANCE AND INSTALLATION All Units are Factory Shipped in the Vertical Discharge

Configuration

sory curb fits sizes 036-072; another accessory curb fits sizes 090-150.) Contractors can order and install the roof curbs early in the construction stage, before decisions on size requirements have been made.

All Units Feature Heavy-Gage Roll-Formed Baserail

with forklift slots on 3 sides of the unit and rigging holes for easier maneuvering and installation. Stretch-wrap packaging protects the unit during shipment and storage.

Units are Easily Converted

tions to make retrofit and add-on jobs easier. To convert 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.

Standard high-performance, belt-driven, evaporator-fan motors enable 581B036-150 units to operate in most ductwork configurations.

Ductwork Connections are Made Easy

aspect ratio. On vertical discharge units, ductwork attaches directly to the roof curb.

for fit-up to standard roof curbs. (One acces-

design

from vertical to horizontal applica-

by the logical 2 to 1

Form No. PDS 581B.36.5

FEATURES/BENEFITS (cont)

FACTORY-INSTALLED OPTIONAL CONVENIENCE OUTLET

FACTORY-INSTALLED OPTIONAL DISCONNECT SWITCH

PREMIUM QUALITY SCROLL COMPRESSORS

REFRIGERATION SYSTEM PROTECTION

BALL BEARING, PERMANENTLYLUBRICATED MOTORS

DIMPLED HEAT EXCHANGERS

BELT DRIVEN EVAPORATOR FANS

ON-SITE CONVERTIBILITY FROM VERTICAL TO HORIZONTAL DISCHARGE

HIGH-EFFICIENCY COILS AND FIXED ORIFICE REFRIGERANT METERING DEVICE

SLOPED NON-CORROSIVE CONDENSATE DRAIN PAN

SINGLE PIECE TOP PANEL

NO TOOL FILTER ACCESS

FULLY MODULATING ECONOMIZER (OPTION OR ACCESSORY)

SLEEVE BEARING PERMANENTLYLUBRICATED MOTORS

HIGH-EFFICIENCY COILS

FEATURES/BENEFITS (cont)

Thru-the-Bottom Service Connection Capability

standard with the rooftop unit to allow power and control wiring to be routed through the unit’s basepan, thereby minimizing roof penetrations (to prevent water leaks). Both power and control connections are made on the same side of the unit to simplify installation.

The Non-Corrosive, Sloped, Condensate Drain Pan

standard and in conformance with ASHRAE (American Society of Heating, Refrigeration, and Air Conditioning Engineers) Standard 62 to meet many Indoor Air Quality (IAQ) specifications. The condensate drain pan offers both bottom and end drain capability to minimize roof penetrations. The bottom drain can be used in conjunction with thru-the-bottom connections. An external trap must be field supplied.

Standard 2-in. Throwaway Filters

are easily accessed through an easily removable filter access panel located directly above the air intake hood; no tools are required to change the filters.

All Units are Designed with a Single Continuous Top Piece

to eliminate leaking at the seams or gasketing, which tends to deteriorate over time and shift during rigging procedures.

Belt-Driven Evaporator-Fan Motors

allow maximum on-site

flexibility without changing motors or drives.

Low-Voltage Wiring Connections

are easily made due to the large terminal board which is conveniently located for quick, simple access.

QUIET, EFFICIENT OPERATION AND DEPENDABLE PERFORMANCE

All Units are Equipped With Scroll Compressors

fully hermetic with internal vibration isolators for extremely quiet operation. The scroll compressors are quieter and more reliable than reciprocating designs. Compressors are mounted on an independent plate for additional sound integrity and structural support. Efficient condenser fan and motor design permits operation at low sound levels.

Totally Enclosed Condenser-Fan Motors

and permanently

lubricated bearings provide additional dependability.

All Coils Use State-of-the-Art Internally Enhanced Copper Tubing —

Coils are thoroughly tested with helium particles as well as pressure tested at the factory. Condenser coils have louvered, aluminum lanced fins to provide maximum heat transfer for optimum efficiency and easy cleaning.

Exclusive Dimpled Heat Exchangers

optimize heat transfer for improved efficiency. The tubular design permits hot gases to make multiple passes across the path of the supply air. In addition, dimpled heat exchanger tubes act as baffles, forcing the hot gases to stay in close contact with the cell walls to maximize heat transfer and efficiency.

The California Air Quality Management NOx

40 nanograms/joule or less is met with Low kit NOx models in 036-060 sizes.

The Induced Draft Combustion System

unsightly appearance of flue stacks, and diminishes the effects of winds on heating operation. The inducer fan draws hot combustion gas through the heat exchanger at the optimum rate for the most effective heat transfer. The induced draft (negative pressure) also prevents contaminants from entering the supply air if a leak in the heat exchanger occurs.

The Direct Spark Ignition System

saves operating expense when compared to old-style pilot ignition systems. No crossover tube is required, therefore no sooting or pilot fouling problems can occur.

comes

which are

requirement of

eliminates the

LP (Liquid Propane) Conversion Kit —

Standard units are designed for natural gas. An LP Conversion Kit is available as an accessory, if required. Installation of the accessory LP kit simply involves changing the gas orifices to accommodate liquid propane gas.

have standard:

Refrigerant Circuit Protection

assures dependability. All units

1) loss-of-charge/low-pressure protection switch which allows

operation at lower ambient conditions while protecting against low-charge operation

2) freeze-protection thermostat, which protects against evapo-

rator coil frost build-up

3) high-pressure switch, which protects against above normal

operating pressure

4) filter driers, which trap moisture and debris in the refrigera-

tion system.

5) Bryant’s exclusive fixed orifice metering device, which pre-

cisely controls refrigerant flow, preventing slugging and floodback, while maintaining optimum unit performance by metering the circuits individually.

/2 to 121/2 ton

Two Independent Compressor Circuits

(all 7 units) provide pinpoint comfort control, improved efficiency, and back-up capability.

The Standard Control System

is readily adaptable to all con-

ventional thermostats.

Integrated Gas Unit Controller (IGC) —

All ignition components are contained in the compact Integrated Gas Controller (IGC) that is easily accessible for service. The IGC provides built in diagnostic capabilities. An LED simplifies troubleshooting by providing visual fault notification and system status information. The IGC board provides exclusive anti-cycle protection for its gas heat operation. The IGC also contains burner control logic for dependable heating operation. The LED is visible without removing the unit control box access panel. The 581B units maximize heating efficiency through the IGC’s control of evapo- rator fan ON/OFF delays. The IGC helps make 581B units reliable for many years.

Patented Cycle-LOC™ Protection System

provides protection against compressor cycling by monitoring compressor current draw. When lack of compressor current exists, the CycleLOC circuit board locks out the compressors. The Cycle-LOC board may be manually reset by simply switching thermostat to OFF, and then back to the Cooling or AUTO modes. No manipulation of the unit disconnect switch is needed.

TABLE OF CONTENTS

Page

Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . 4

ARI Capacities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12

Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .13,14

Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .15,16

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-44

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45-48

Application Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49-53

Typical Piping and Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Typical Wiring Schematic. . . . . . . . . . . . . . . . . . . . . . . . . .55-57

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58,59

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60-62

FEATURES/BENEFITS (cont)

INDOOR AIR QUALITY (IAQ) The Quality of Building Air is Improved

as the DuraPac Plus series utilizes certain key features that assist in improving indoor air quality. A sloped condensate pan eliminates possible biological growth in the rooftop unit. A face-split evaporator coil (090-150 sizes) design proves effective in removing additional moisture from the supply air. Two-in. filters are standard in all rooftop units and an optional filter status sensor is available.

SERVICEABILITY Standardized Components

for the complete DuraPac Plus line of products are found in all safety devices, condenser-fan motors, evaporator-fan motors, and control boards, while the gas sections use common inducer motors, limit switches, and rollout switches. This allows for greater inventory control, familiarity of parts, and fewer stocked parts.

MODEL NUMBER NOMENCLATURE

581B E V 090 180 N AA

Easily Accessible Refrigerant Access Ports

on all discharge, suction, and liquid lines permit easy and accurate measurements as well as simple accessibility.

Resettable 24-v Circuit Breaker On 581B090-150 Units

allows room for error without replacing transformers or fuses.

Single-Side Utility Connections

provide easy access to per-

form any necessary service.

Color-Coded Wires Belt-Driven Motors

permit easy tracing and diagnostics.

are accessible through a single access

door to facilitate servicing and adjusting after installation.

Compressors and Safety Switches are Easily Accessible

for

troubleshooting and system analysis.

581B – Single Package

High-Efficiency Gas/Electric Unit

Voltage Designation E – 460-3-60 J – 208/230-1-60 P – 208/230-3-60 T – 575-3-60

Fuel and Control Type V – Natural Gas/Direct

Spark Ignition

Nominal Tons 036 – 3 090 – 7-1/2 048 – 4 102 – 8-1/2 060 – 5 120 – 10 072 – 6 150 – 12-1/2

*Refer to the Trade Prices for ordering codes of factory-installed options.

Factory-Installed Options*

N – Low NOx Units

Gas Heat Input (Btuh) 072 – 72,000 180 – 180,000 115 – 115,000 220 – 224,000 125 – 125,000 250 – 250,000 150 – 150,000 Low NOx* California Compliant 3 Phase 060N – 60,000 071 – 72,000 090N – 90,000 114 – 115,000 120N – 120,000 149 – 150,000

ARI* CAPACITIES

UNIT 581B

036 048 060 072 090 102 120 150

dB — EER — IPLV — SEER —

*Air-Conditioning & Refrigeration Institute.

†Applies only to units with capacity of 65,000 Btuh or less.

**The IPLV is not applicable to single-compressor units.

NOTES:

1. Rated in accordance with ARI Standard 210/240 (size 036-120 units) or 360

Decibels Energy Efficiency Ratio Integrated Part-Load Value Seasonal Energy Efficiency Ratio

(size 150 units) and 270 (size 036-150 units).

NOMINAL

TON S

STANDARD

CFM

COOLING

(Btuh)

TOTAL

SEER† EER

3 1200 36,000 3.21 13.00 11.20 76 — 4 1450 47,000 4.25 13.00 11.05 76 — 5 1750 60,000 5.55 13.00 11.00 80 — 6 2100 74,000 6.70 — 11.00 80 —

10 3200 120,000 10.91 — 11.00 84 9.7

LEGEND

3000 90,000 8.18 — 11.00 82 11.6 3000 102,000 9.44 — 10.80 82 10.9

4300 140,000 14.04 — 9.50 86 9.8

2. Ratings are net values, reflecting the effects of circulating fan heat. Ratings are based on:

Cooling Standard:

db outdoor entering-air temperature.

IPLV Standard:

db outdoor entering-air temperature.

Sizes 036-120 Only Size 150 Only

HEATING CAPACITIES AND EFFICIENCIES

SIZE

581B 036071* 036072† 036114* 036115† 036060N** 036090N** 048071* 048072† 048114* 048115† 048149* 048150† 048060N** 048090N** 048120N** 060071* 060072† 060114* 060115† 060149* 060150† 060060N** 060090N** 060120N** 072072 072115 072150 090125 090180 090224 102125 102180 102224 120180 120224 120250 150224 150250

LEGEND

Annual Fuel Utilization Efficiency

AFUE —

*California rated three-phase models.

†Three-phase standard models have heating input values as shown. Single-phase standard models

have one-stage heating with heating input values as follows:

581BJV036-060072, 72,000 Btuh 581BJV036-060115, 115,000 Btuh 581BJV048-060150, 150,000 Btuh

**California SCAQMD compliant Low NOx models have combustion products that are controlled to

40 nanograms per joule or less.

HEATING INPUT (Btuh)

Stage 2/Stage 1

OUTPUT CAPACITY

(Btuh)

—/72,000 —/ 59,040 15-45 82 82

72,000/ 50,000 59,040/ 41,000 15-45 82 82

—/115,000 —/ 92,000 55-85 80 80

115,000/ 82,000 92,000/ 65,600 55-85 80 82

—/60,000 —/ 50,000 20-50 81 81

— 90,000 —/ 74,000 30-60 81 81

—/72,000 —/ 59,040 15-45 82 82

72,000/ 50,000 59,040/ 41,000 15-45 82 82

—/115,000 —/ 92,000 35-65 81 81

115,000/ 82,000 93,150/ 66,420 35-65 81 81

—/150,000 —/120,000 50-80 80 80

150,000/120,000 120,000/ 96,000 50-80 80 80

—/60,000 —/ 50,000 20-50 81 81 —/90,000 —/ 74,000 30-60 81 81 —/120,000 —/101,000 40-70 82 82 —/72,000 —/ 59,040 15-45 82 82

72,000/ 50,000 59,040/ 41,000 15-45 82 82

—/115,000 —/ 93,150 35-65 81 81

115,000/82,000 93,150/ 66,420 35-65 81 81

—/150,000 —/120,000 50-80 80 80

150,000/120,000 120,000/ 96,000 50-80 80 80

—/60,000 —/ 50,000 20-50 81 81 —/90,000 —/ 74,000 30-60 81 81 —/120,000 —/101,000 40-70 82 82

72,000/ 50,000 59,040/ 41,000 15-45 82 82 115,000/ 82,000 93,150/ 66,420 35-65 81 81 150,000/120,000 120,000/ 96,000 50-80 80 80 125,000/ 90,000 102,500/ 72,900 20-50 82 82 180,000/120,000 147,600/ 98,400 35-65 82 82 224,000/180,000 183,700/147,600 45-75 82 82 125,000/ 90,000 102,500/ 72,900 20-50 82 82 180,000/120,000 147,600/ 98,400 35-65 82 82 224,000/180,000 183,700/147,600 45-75 82 82 180,000/120,000 147,600/ 98,400 35-65 82 82 224,000/180,000 183,700/147,600 45-75 82 82 250,000/200,000 200,000/160,000 40-70 80 80 224,000/180,000 183,700/147,600 45-75 82 82 250,000/200,000 200,000/160,000 40-70 80 80

SOUND RATING

(dB)

80 F db, 67 wb indoor entering-air temperature and 95 F

80 F db, 67 F wb indoor entering-air temperature and 80 F

TEMPERATURE

RISE

AFUE

(%)

STEADY-STAGE EFFICIENCY (%)

IPLV**

ITEM OPTION* ACCESSORY† Perfect Humidity™ Dehumidification Package Integrated Economizer — Durablade Integrated Economizer — EconoMi$er (gear driven) EconoMi$er with Power Exhaust (Vertical Only) Power Exhaust for EconoMi$er High-Static Motor (except 150) Hinged Access Panels 25% Manual Outdoor-Air Damper 50% Manual Outdoor-Air Damper Convenience Outlet Unit Mounted Disconnect Two-Position Damper (25% Open) Two-Position Damper (100% Open) Roof Curb (14 in.) Roof Curb (24 in.) Thru-the-Bottom Service Connections Thermostat and Subbase Light Commercial Thermostat Light Commercial Thermidistat Time Guard® II Control Circuit (3-Phase Units Only) Motormaster® Low Ambient Control Motormaster II Low Ambient Control Motormaster IV Low Ambient Control Accusensor™ II Enthalpy Control Accusensor III Differential Enthalpy Sensor Liquid Propane Conversion Kit Flue Discharge Deflector Flue-Hood Protector Assembly Coil Guard Grille Condenser Coil Hail Guard Fan/Filter Status Switch Corrosion Resistant Coils

*Indicates a factory-installed option.

†Indicates a field-installed accessory.

OPTIONS AND ACCESSORIES

X XX XX

X X X XX

X X X

X X

LOW AMBIENT CONTROLS

The 581B036-150 standard units are designed to operate in cooling at outdoor temperatures down to 25 F. With accessory Motormaster control (condenser-fan speed modulation), or Motormaster II control (condenser-fan cycling), units can operate at outdoor temperatures down to –20 F. The head pressure controls, which mount in the condenser section, control the condenser-fan motor to maintain correct condensing temperature.

MOTORMASTER I

MOTORMASTER II

TIME GUARD II CONTROL

Time Guard II Control automatically prevents compressor from restarting for at least 5 minutes after a shutdown. Field-installed accessory prevents short cycling of compressor if thermostat is rapidly changed. Time Guard II device mounts in the control compartment of unit. The Time Guard II device is not required when a programmable thermostat is applied.

LIQUID PROPANE CONVERSION KIT

BURNER SPUDS (ORIFICES)

Liquid propane conversion kit allows the unit to utilize a liquid propane fuel supply in areas where natural gas is not available. (Kit shown is for sizes 036-072.)

OPTIONS AND ACCESSORIES (cont)

CONTROLLER

BAROMETRIC RELIEF DAMPERS

OUTDOOR AIR TEMPERATURE SENSOR

GEAR-DRIVEN DAMPER

ACTUATOR

ECONOMI$ER PLUG

UNIT MOUNTED DISCONNECT

Factory-installed, internally-mounted, NEC (National Electrical Code) and UL (Underwriters’ Laboratories) approved non-fused switch provides unit power shutoff with disconnect lockout protection capability. The switch is accessible from outside the unit.

CONVENIENCE OUTLET

ECONOMI$ER

Factory-installed EconoMi$er utilizes a microprocessor-based control, gear drive damper system, low pressure drop characteristics, built-in spring return (for close upon power loss), and an integral barometric damper.

NOTE: EconoMi$er is only available for vertical ductwork applications and can be field or factory installed.

DURABLADE ECONOMIZER

Factory-installed, internally mounted and externally accessible 115-v female receptacle. Includes 15-amp GFI (Ground Fault Interrupter) receptacle with independent fuse protection. Voltage required to operate convenience outlet is provided by a factory-installed transformer.

Exclusive Durablade economizer damper design saves energy while providing economical and reliable cooling. A sliding plate on the face of the economizer controls the amount of outdoor air entering the system. When the sliding plate is closed, it provides a leakproof seal which prevents ambient air from seeping in or conditioned air from seeping out. It can be easily adjusted for 100% outdoor air or any proportions of mixed air. Equipped with standard controls and 30% barometric relief capabilities.

PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE

The Perfect Humidity dehumidification package is a factory-installed option that provides increased dehumidification by cooling the hot liquid refrigerant leaving the condenser coil. The package consists of a subcooling coil located on the leaving-air side of the evaporator coil. The location of this coil in the indoor-air stream enhances the latent capacity of the 581B units by as much as 40%. The Perfect Humidity package includes crankcase heater(s) and low-pressure switch(es) and operation can be controlled by a field-installed, wall-mounted humidistat or light commercial thermidistat.

OPTIONS AND ACCESSORIES (cont)

MINIMUM

POSITION

OPEN

REV

198818A

7 0

B A

8 0

DAMPER

CLOSED

OPEN

OUTDOOR TEMP

-3

672

–SETPOINTS

–CCW

CONT

A CTS SHOWN IN HIGH ENTHA

LPY

R U S H A T 24

V A C

3 m

A M IN . A T 1

1 VD

CONT

ACT RA

TINGS: 1.5A

RUN, 3.5A

OR U

NPOWERED ST

A TE

TR1

2 4 V

A C

ENTHALPY CONTROL

HAIL GUARD

Hail guard accessory (field installed) protects condenser coils against damage from hail and other flying debris.

COIL GUARD GRILLE

ACCUSENSOR™ II ENTHALPY CONTROL

ACCUSENSOR III DIFFERENTIAL ENTHALPY

Coil guard grille protects coils against large objects and vandalism.

Accusensor economizer controls help provide efficient, economical economizer operation. The Accusensor I dry-bulb sensor measures outdoor temperature and is standard with the Durablade economizer.

The accessory Accusensor II solid-state enthalpy control senses both dry and wet bulb of the outdoor air to provide an accurate enthalpy reading. Accusensor II control is available as a field-installed accessory for the Durablade economizer.

The accessory Accusensor III differential enthalpy sensor control compares outdoor temperature and humidity to return-air temperature and humidity and determines the most economical mixture of air. Accusensor III is available for Durablade economizers.

BRYANT COMMERCIAL PROGRAMMABLE THERMOSTAT

Designed specifically for use with Bryant commercial systems, this Bryant programmable thermostat features LED occupied/unoccupied displays and setback mode which can override continuous fan operation.

BRYANT LIGHT COMMERCIAL THERMIDISTAT

The light commercial thermidistat combines temperature and dehumidification control in one device and provides continuous fan operation in occupied mode. Recommended for use with the Perfect Humidity™ package.

PHYSICAL DATA

UNIT SIZE 581B 036 048 060 072 NOMINAL CAPACITY

OPERATING WEIGHT (lb)

Unit With Durablade Economizer With EconoMi$er With Perfect Humidity™ Dehumidification Package Roof Curb

COMPRESSOR

Quantity Oil (oz)

REFRIGERANT TYPE

Operating Charge (lb-oz)

Standard Unit Unit With Perfect Humidity Dehumidification Package

CONDENSER FAN

Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total)

CONDENSER COIL

Standard Unit

Rows...Fins/in. Total Face Area (sq ft)

Unit with Perfect Humidity Dehumidification Package

Rows...Fins/in. Total Face Area (sq ft)

EVAPORATOR FAN

Quantity...Size (in.) Nominal Cfm Maximum Continuous Bhp Std

Motor Frame Size Std

Fan Rpm Range Std

Motor Bearing Type Maximum Fan Rpm Motor Pulley Pitch Diameter

A/B (in.)

Nominal Motor Shaft Diameter (in.) Std

Fan Pulley Pitch Diameter (in.) Std

Belt — Type...Length (in.) Std

Pulley Center Line Distance (in.) Speed Change per Full Turn of

Movable Pulley Flange (rpm)

Movable Pulley Maximum Full

Turns from Closed Position

Factory Setting — Full Turns Open Std

Factory Speed Setting (rpm) Std

Fan Shaft Diameter at Pulley (in.)

Hi-Static

Std

Hi-Static

Std

Hi-Static

Std

Hi-Static

EVAPORATOR COIL

Rows...Fins/in. Total Face Area (sq ft)

LEGEND

Brake Horsepower

Bhp —

*Single phase/three phase.

†Indicates automatic reset.

**581B 072 unit size 036-072 (72,000 Btu heat input) have 2 burners.

581B 115 unit size 036-072 (115,000 Btu heat input) have 3 burners. 581B 150 unit size 048-072 (150,000 Btu heat input) have 3 burners.

††An LP kit is available as an accessory.

llCalifornia compliant three-phase models.

530 540 560 615 564 574 594 649 577 587 607 662 548 558 578 633 115 115 115 115

Scroll

1111

42 53 50 60

R-22

5- 8 8-6 10- 0 9-10 8-13 11-2 12-13 13- 6

Propeller

1...22 1...22 1...22 1...22 3500 3500 4100 4100

/4...825

180 180 320 320

/4...825

/4...1100

Enhanced Copper Tubes, Aluminum Lanced Fins

1...17 2...17 2...17 2...17

14.6 16.5 16.5 16.5

1...17 1...17 1...17 1...17

3.9 3.9 3.9 3.9

Centrifugal Type, Belt Drive

1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10 1200 1600 2000 2400

1.20 1.20 1.30/2.40* 2.40

2.40 2.40 2.90 2.90 48 48 48/56* 56

56 56 56 56

760-1090 840-1185 1020-1460/1120-1585* 1120-1585

1075-1455 1075-1455 1300-1685 1300-1685

Ball Ball Ball Ball

2100 2100 2100 2100

1.9/2.9 1.9/2.0 2.4/3.4 2.4/3.4

2.8/3.8 2.8/3.8 3.4/4.4 3.4/3.4

4.5 4.0 4.0 4.0

4.5 4.0 4.5 4.5

1...A...33 1...A...33 1....4...40 1...A...38

1...A...39 1...A...39 1...A...40 1...A...40

10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5 65 70 75 95 65 65 60 60

5565 6655

3333

890 980 1240 1304

1233 1233 1396 1396

31/

5 5

31/

Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Fixed Orifice Metering Device

2...15 2...15 4...15 4...15

5.5 5.5 5.5 5.5

***Three-phase standard models have heating inputs as shown. Single-

phase standard models have one-stage heating with heating input values as follows:

581BJV036-060072, 72,000 Btuh 581BJV036-060115, 115,000 Btuh 581BJV048-060150, 150,000 Btuh

†††California SCAQMD compliant Low NO

ucts that are controlled to 40 nanograms per joule or less.

models have combustion prod-

31/

PHYSICAL DATA (cont)

UNIT SIZE 581B 036 048 060 072

FURNACE SECTION

Rollout Switch Cutout Temp (F)†

Burner Orifice Diameter (in. ...drill size)**

Natural Gas — Std 071/072

Liquid Propane — Alt†† 071/072

Thermostat Heat Anticipator Setting (amps)

(208/230/460/575 V)

Gas Input (Btuh)

First Stage/Second Stage 071II

114/115 149/150

060N 090N 120N

114/115 149/150

060N 090N 120N

114II 149II

072*** 115*** 150***

060N††† 090N††† 120N†††

Efficiency (Thermal) (%) 071

060N 090N 120N

Temperature Rise Range 071

060N 090N

Manifold Pressure (in. wg)

Natural Gas — Std Liquid Propane — Alt††

Maximum Static Pressure (in. wg)

120N

Field Gas Connection Size (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief Cutout Reset (Auto.)

LOSS-OF-CHARGE SWITCH/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout Reset (Auto.)

FREEZE PROTECTION THERMOSTAT

Opens (F) Closes (F)

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

RETURN-AIR FILTERS

Quantity...Size (in.)

LEGEND

Brake Horsepower

Bhp —

*Single phase/three phase.

†Indicates automatic reset.

**581B 072 unit size 036-072 (72,000 Btu heat input) have 2 burners.

581B 115 unit size 036-072 (115,000 Btu heat input) have 3 burners. 581B 150 unit size 048-072 (150,000 Btu heat input) have 3 burners.

††An LP kit is available as an accessory.

llCalifornia compliant three-phase models.

114 149

072 115 150

114 149

072 115 150

195 195 195 195

.113...33 .113...33 .113...33 .113...33 .113...33 .113...33 .113...33 .113...33

— .129...30 .129...30 .129...30

.102...38 .102...38 .102...38 — .102...38 .102...38 .102...38 —

— .116...32 .116...32 —

.089...43 .089...43 .089...43 .089...43 .089...43 .089...43 .089...43 .089...43

— .102...38 .102...38 .102...38

.082...45 .082...45 .082...45 — .082...45 .082...45 .082...45 —

— .094...42 .094...42 —

.14 .14 .14 .14

—/ 72,000 —/ 72,000 —/ 72,000 — —/115,000 —/115,000 —/115,000 —

——/150,000 —/150,000 —

50,000/ 72,000 50,000/ 72,000 50,000/ 72,000 50,000/ 72,000 82,000/115,000 82,000/115,000 82,000/115,000 82,000/115,000

— 120,000/150,000 120,000/150,000 120,000/150,000

—/ 60,000 —/ 60,000 —/ 60,000 — —/ 90,000 —/ 90,000 —/ 90,000 —

——/120,000 —/120,000 —

82 82 82 — 80 81 81 — — 80 80 —

82 82 82 82 80 81 81 81 — 80 80 80

81 81 81 — 81 81 81 — — 82 82 —

15-45 15-45 15-45 — 55-85 35-65 35-65 —

— 50-80 50-80 —

15-45 15-45 15-45 15-45 55-85 35-65 35-65 35-65

— 50-80 50-80 50-80

20-50 20-50 20-50 — 30-60 30-60 30-60 —

— 40-70 40-70 —

3.5 3.5 3.5 3.5

1.0 1.0 1.0 1.0

450 ± 50

428 320

7 ± 3

22 ± 5

30 ± 5 45 ± 5

Cleanable

1...20 x 24 x 1

Throwaway

2...16 x 25 x 2

***Three-phase standard models have heating inputs as shown. Single-

phase standard models have one-stage heating with heating input values as follows:

581BJV036-060072, 72,000 Btuh 581BJV036-060115, 115,000 Btuh 581BJV048-060150, 150,000 Btuh

†††California SCAQMD compliant Low NO

ucts that are controlled to 40 nanograms per joule or less.

models have combustion prod-

PHYSICAL DATA (cont)

UNIT SIZE 581B 090 102 120 150 NOMINAL CAPACITY (tons)

81/

10 121/

OPERATING WEIGHT (lb)

Unit With Durablade Economizer With EconoMi$er With Perfect Humidity™ Dehumidification Package Roof Curb*

COMPRESSOR

Quantity Oil (oz) (each compressor)

REFRIGERANT TYPE

Operating Charge (lb-oz) Standard Unit

Circuit 1 Circuit 2

Unit With Perfect Humidity Dehumidification

Package

Circuit 1 Circuit 2

CONDENSER FAN

Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total)

CONDENSER COIL

Standard Unit

Rows...Fins/in. Total Face Area (sq ft)

Unit with Perfect Humidity Dehumidification

Package

Rows...Fins/in. Total Face Area (sq ft)

EVAPORATOR FAN

Size (in.) Typ e Dr ive Nominal Cfm Maximum Continuous Bhp Std

Motor Frame Fan Rpm Range Std

Motor Bearing Type Maximum Fan Rpm Motor Pulley Pitch Diameter

A/B (in.) Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) Std

Belt — Type...Length (in.) Std

Pulley Center Line Distance (in.) Speed Change per Full Turn of

Movable Pulley Flange (rpm) Movable Pulley Maximum Full

Turns from Closed Position Factory Setting — Full Turns Open Std

Factory Speed Setting (rpm) Std

Fan Shaft Diameter at Pulley (in.)

Hi-Static

EVAPORATOR COIL

Rows...Fins/in. Total Face Area (sq ft)

LEGEND

Bhp —

Brake Horsepower

*Weight of 14-in. roof curb.

Std

870 880 1035 1050 914 924 1079 1094 932 942 1097 1112 899 909 1068 1083 143 143 143 143

Scroll

22 22

53 53 50 60

R-22

7-10 7-14 9-10 9-8 8- 2 8- 5 10-10 9-5

10-10 10-11 13- 0 12-6 12- 8 10-10 13- 5 12-2

Propeller

2...22 2...22 2...22 2...22 6500 6500 7000 7000

/4...1100

650 650 650 650

/4...1100

Enhanced Copper Tubes, Aluminum Lanced Fins

2...17 2...17 2...17 2...17

20.5 20.5 25.0 25.0

1...17 1...17 1...17 1...17

6.3 6.3 8.4 8.4

Centrifugal

15 x 15 15 x 15 15 x 15 15 x 15

Belt Belt Belt Belt

3000 3400 4000 5000

2.90 2.90 3.70 5.25

4.20 4.20 5.25 — 56 56 56 56

840-1085 840-1085 860-1080 900-1260 860-1080 860-1080 830-1130 —

Ball Ball Ball Ball

2100 2100 2100 2100

3.4/4.4 3.4/4.4 4.0/5.0 2.8/3.8

4.0/5.0 4.0/5.0 2.8/3.8 —

7.0 7.0 8.0 5.8

8.0 8.0 5.8 — A...51 A...51 A...51 BX...46 A...55 A...55 BX...46 —

16.75-19.25 16.75-19.25 15.85-17.50 15.85-17.50 50 50 45 60 60 60 60 —

55 56 55 6— 55 55

55 5— 840 840 860 960 860 860 890 —

11 11

Enhanced Copper Tubes, Aluminum Double-Wavy Fins

3...15 3...15 4...15 4...15

8.9 8.9 11.1 11.1

†Rollout switch lockout is manually reset by interrupting power to unit or

resetting thermostat.

High-static motor not available on size 150 units.

NOTE:

UNIT SIZE 581B

FURNACE SECTION

Rollout Switch Cutout Temp† Burner Orifice Diameter

(in. ...drill size)

Natural Gas Std Lo

Liquid Propane Accy Lo

Thermostat Heat Anticipator Setting (amps)

208/230 v and 575 Stage 1

460 v Stage 1

Gas Input (Btuh)Stage1/Stage 2 Lo

Stage 2

Efficiency (Steady State) (%)

Temperature Rise Range Lo

Manifold Pressure (in. wg)

Natural Gas Std

Liquid Propane Accy Gas Valve Quantity Gas Valve Pressure Range

Psig

in. wg Field Gas Connection Size (in.) Lo

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief (Differential)

Cutout Reset (Auto.)

LOSS-OF-CHARGE (LOW-PRESSURE) SWITCH (psig)

Cutout Reset (Auto.)

FREEZE PROTECTION THERMOSTAT (F)

Opens Closes

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

RETURN-AIR FILTERS

Quantity...Size (in.)

LEGEND

Bhp —

Brake Horsepower

*Weight of 14-in. roof curb.

Med Hi

HEAT

PHYSICAL DATA (cont)

090 102 120 150

195 195 195 195

.120...31 .120...31 .120...31 .120...31 .120...31 .120...31 .120...31 .129...30 .120...31 .120...31 .129...30 — .096...41 .096...41 .096...41 .096...41 .096...41 .096...41 .096...41 .102...38 .096...41 .096...41 .102...38 —

.14 .14 .14 .14 .20 .20 .20 .20 .14 .14 .14 .14 .20 .20 .20 .20

125,000/— 125,000/— 120,000/180,000 180,000/224,000 120,000/180,000 120,000/180,000 180,000/224,000 200,000/250,000 180,000/224,000 180,000/224,000 200,000/250,000 —/—

82 82

20-50 20-50 35-65 35-65 35-65 35-65 35-65 40-70 45-75 45-75 40-70 —

3.5 3.5 3.5 3.5

3.5 3.5 3.5 3.5 11 1 1

0.180-0.487 0.180-0.487 0.180-0.487 0.180-0.487

5.0-13.5 5.0-13.5 5.0-13.5 5.0-13.5

450 ± 50 500 ± 50

428 428 320 320

4...16 x 20 x 2 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2

†Rollout switch lockout is manually reset by interrupting power to unit or

resetting thermostat.

High-static motor not available on size 150 units.

NOTE:

82, 80 (in 250,000 Btuh

heat range)

7 ± 3

22 ± 7

30 ± 5 45 ± 5

Cleanable

1...20 x 24 x 1

1...16 x 25 x 1

Throwaway

82, 80 (in 250,000 Btuh

heat range)

—

BASE UNIT DIMENSIONS

STANDARD

UNIT 581B

036 048 060 072

A B C D E F G

UNIT

WEIGHT

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg

530 240 34 15.4 47 21.3 127 57.6 122 55.3 138 62.6 143 64.9 540 245 34 15.4 47 21.3 129 58.5 124 56.2 141 64.0 146 66.2 560 254 34 15.4 47 21.3 134 60.8 129 58.5 146 66.2 151 68.5 615 279 34 15.4 47 21.3 147 66.7 142 64.4 160 72.6 166 75.3

Dia [35] Field Power Supply Hole

″″″″

Dia [51] Power Supply Knockout

″″″″

13/

Dia [44] Charging Port Hole

″″″″

Dia [22] Field Control Wiring Hole

″″″″

-14 NPT Condensate Drain

″″″″

-14 NPT Gas Connection

″″″″

21/

Dia [64] Power Supply Knockout

″″″″

DURABLADE

ECONOMI ZER

WEIGHT

CONNECTION SIZES

ECONOMI $ER

WEIGHT

CORNER

WEIGHT

(A)

CORNER WEIGHT

(B)

CORNER

WEIGHT

NOTES:

1. Dimensions in [ ] are in millimeters.

(C)

CORNER WEIGHT

(D)

BOTTOM POWER CHART, THESE HOLES REQUIRED FOR

USE WITH ACCESSORY PACKAGES — CRBTMPWR001A00,

3A00 (1/

, 3/

″

THREADED

CONDUIT SIZE

″″″″

11/

″″″″

FPT

(003) 1/

″″″″

(004)

FPT

*Select either 3/

) OR CRBTMPWR002A00, 4A00 (1/

″

WIRE

USE

24 V Power * 11/ Power * 13/

Gas 1 Gas 1

or 11/

for power, depending on wire size.

″

REQURED

HOLE SIZES (MAX.)

″

[22.2] [28.4]

[44.4] [31.8] [41.3]

, 11/

″

2. Center of gravity.

3. Direction of airflow.

4. On vertical discharge units, ductwork to be attached to accessory roof curb only. For horizontal discharge units, field-supplied flanges should be attached to horizontal discharge openings, and all ductwork should be attached to the flanges.

5. Minimum clearance (local codes or jurisdiction may prevail):

a. Between unit, flue side and combustible surfaces, 48 inches. b. Bottom of unit to combustible surfaces (when not using curb), 1 inch.

Bottom of base rail to combustible surfaces (when not using curb) 0 inches.

c. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the

greater clearance is optional. d. Overhead, 60 in. to assure proper condenser fan operation. e. Between units, control box side, 42 in. per NEC (National Electrical Code).

f. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.

g. Between unit and block or concrete walls and other grounded surfaces, control box side,

42 in. per NEC. h. Horizontal supply and return end, 0 inches.

6. With the exception of the clearance for the condenser coil and combustion side as stated in notes 5a, b and c, a removable fence or barricade requires no clearance.

7. Units may be installed on combustible floors made from wood or Class A, B, or C roof covering material if set on base rail.

8. The vertical center of gravity is 1′-6″ [457] up from the bottom of the base rail.

)

″

581B036-072

BASE UNIT DIMENSIONS (cont)

STANDARD

UNIT

UNIT WE IGHT

A B C D

581B

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-i n. mm ft-in . mm ft-in. mm

870 39 5 44 20 62 28.1 189 86 161 73 239 109 280 127 2-0

090

880 39 9 44 20 62 28.1 191 87 163 74 242 110 284 129 1-27/8378 3-55/161050 2-911/16856 2- 27/16672

102

1035 469 44 20 62 28.1 225 102 192 87 285 129 333 151 1-2

120

1050 476 44 20 62 28.1 228 103 195 88 289 131 338 153 1-27/8378 4-15/161253 3-03/8924 2-1 07/16875

150

Dia [35] Field Power Supply Hole

″

Dia [64] Power Supply Knockout

″

Dia [44] Charging-Por t Hole

″

Dia [22] Field Control Wiring Hole

″

-14 NPT Condensate Drain

″

-14 NPT Gas Conn. — 581B09 0 & 102 —125 Heat

″

-14 NPT Gas Conn. — 581B09 0 to 120 — 180 Heat

″

581B 090 to 150 — 224 Heat, 581B120 & 15 0 — 250 Heat 2″ Dia [51] Power Supply Knockout

CONNECTION SIZES

DURABLADE

ECONOMIZER WEIGHT

ECONOMI$ER

WEIGHT

CORNER

WEIGHT (A)

BOTTOM POWER CHART, THESE HOLES

REQUIRED FOR USE WITH ACCESSORY PACKAGES —

CRBTMPWR001A00, 2A00 (

CRBTMPWR002A00, 4A00 (1/

THREADED

CONDUIT SIZE

″

FPT

(003) 1/

″

FPT

(004)

″

*Select either

size.

CORNER

WEIGHT (B)

WIRE

USE

24 V

Powe r* 1

Gas 1

for power, depending on wire

11/

″

CORNER

WEIGHT (C)

″

REQUIRED

HOLE SIZES (MAX.)

[22.2]

″

[28.4]

″

[44.4]

″

[31.8]

″

[41.3]

″

, 11/

) OR

″

)

CORNER

WEIGHT (D)

“H”“J”“K”“L”

/8632 3-55/161050 2-911/16856 2- 27/16672

/8378 4-15/161253 3-03/8924 2-1 07/16875

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Center of gravity.

3. Direction of airflow.

5. Minimum clearance (local codes or jurisdiction may prevail): a. Between unit, flue side and combustible surfaces,

48 inches.

b. Bottom of unit to combustible surfaces (when not using

curb), 1 inch. Bottom of base rail to combustible surfaces (when not using curb) 0 inches.

c. Condenser coil, for proper airflow, 36 in. one side, 12 in.

the other. The side getting the greater clearance is optional.

d. Overhead, 60 in. to assure proper condenser fan

operation.

e. Between units, control box side, 42 in. per NEC (National

Electrical Code).

f. Between unit and ungrounded surfaces, control box side,

36 in. per NEC.

g. Between unit and block or concrete walls and other

grounded surfaces, control box side, 42 in. per NEC.

h. Horizontal supply and return end, 0 inches.

6. With the exception of the clearance for the condenser coil and combustion side as stated in notes 5a, b and c, a removable fence or barricade requires no clearance.

7. Units may be installed on combustible floors made from wood or Class A, B, or C roof covering material if set on base rail.

8. The vertical center of gravity is 1′-7″ [483] for 090 and 102, 1′-11″ [584] for 120 and 150 up from the bottom of the base rail.

581B090-150

ACCESSORY DIMENSIONS — 581B036-072

UNIT SIZE

581B

036-072

“A”

ROOF CURB

ACCESSORY

1′-2″ [356] CRRFCURB001A00 2′-0″ [610] CRRFCURB002A00

UNIT SIZE

581B

036-072

1′-4

[406]

″

D ALT

DRAIN

HOLE

[44.5]

1′-9

″

[551]

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 curb (flanges of duct rest on curb).

6. Service clearance 4 ft on each side.

″

“E”

GAS

″

[19] NPT

″

[12.7] NPT

″

[19] NPT

“F”

POWER

[19] NPT

″

[31.7] CRBTMPWR002A00

″

[19] NPT

″

[31.7] CRBTMPWR004A00

″

“G”

CONTROL

″

[12.7] NPT

″

[12.7] NPT

CONNECTOR

PKG. ACCY.

CRBTMPWR001A00

CRBTMPWR003A00

7. Direction of airflow.

8. Connector packages CRBTMPWR001A00 and 002A00 are for thru-the-curb connections. Packages CRBTMP003A00 and 004A00 are for thru-the-bottom connections.

ACCESSORY DIMENSIONS — 581B090-150

CONNECTOR

PKG. ACCY.

CRBTMPWR001A00 CRBTMPWR002A00 1

CRBTMPWR003A00

2′-8

[827]

1′-10

″

[583]

CRBTMPWR004A00

D ALT

DRAIN

HOLE

″

[44.5]

″

“E”

GAS

″

[19] NPT

″

[12.7] NPT

″

[19] NPT

POWER

[19] NPT)

″

[19] NPT

″

“F”

[31.7]

″

[31.7]

″

“G”

CONTROL

″

[12.7]

″

[12.7]

ROOF CURB

ACCESSORY CRRFCURB003A00 CRRFCURB004A00

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1-in. thick polyurethane foam,

/4 lb density.

3. Dimensions in [ ] are in millimeters.

4. Roof curb: 16-gage steel.

5. Attach ductwork to curb (flanges of duct rest on curb).

6. Service clearance 4 ft on each side.

“A”

1′-2″ [356] 2′-0″ [610]

UNIT SIZE

581B

090-150

7. Direction of airflow.

8. Connector packages CRBTMPWR001A00 and 002A00 are for thru-the-curb type. Packages CRBTMPWR003A00 and 004A00 are for thruthe-bottom type connections.

SELECTION PROCEDURE (With 581B048 Example)

I DETERMINE COOLING AND HEATING REQUIRE-

MENTS AT DESIGN CONDITIONS.

Given:

Required Cooling Capacity (TC) . . . . . . . . . . 44,600 Btuh

Sensible Heat Capacity (SHC). . . . . . . . . . . . 32,000 Btuh

Required Heating Capacity . . . . . . . . . . . . . . 85,000 Btuh

Condenser Entering-Air Temperature . . . . . . . . . . . . 95 F

Evaporator Entering-Air Temperature . . . . . . . . .82 F edb,

67 F ewb

Evaporator Air Quantity . . . . . . . . . . . . . . . . . . . .1600 cfm

External Static Pressure (ESP) . . . . . . . . . . . . 0.75 in. wg

Electrical Characteristics (V-Ph-Hz). . . . . . . . . . . 230-1-60

II SELECT UNIT BASED ON REQUIRED COOLING

CAPACITY.

Enter the Cooling Capacities table (page 18) at condenser entering temperature of 95 F, evaporator-air entering at 1600 cfm and 80 F db and 67 F wb. The 581B--048115 unit will provide cooling capacity of 48,900 Btuh and a sensible heat capacity of 34,700 Btuh. For evaporator-air temperature other than 80 F edb, calculate sensible heat capacity correction, as required, using the formula found in Note 3 following the Cooling Capacities tables.

For this example: Correction factor = 1.10 x (1 – .21) x (82 – 80) = 1.738 Multiply the correction factor of 1.738 by 1600 cfm (a total

of 2781). From the Gross Cooling Capacities tables find that the sensible heat capacity at 80 F is 34.7 MBtuh (equivalent to 34,700 Btuh). Add 34,700 and 2781 to get the corrected sensible heat capacity of 37,481.

Unit ratings are gross capacities and do not

NOTE:

include the effect of evaporator-fan motor heat. To calculate net capacities, see Step V.

III SELECT HEATING CAPACITY OF UNIT TO PROVIDE

DESIGN CONDITION REQUIREMENTS.

In the Heating Capacities and Efficiencies table (page 5) note that unit 581B--048115 will provide output capacity of 92,000 Btuh, which is adequate for the given application.

IV DETERMINE FAN SPEED AND POWER REQUIRE-

MENTS AT DESIGN CONDITIONS.

Before entering the Fan Performance tables, calculate the total static pressure required based on unit components. From the given and the Pressure Drop tables (page 40), find:

External static pressure .75 in. wg Durablade economizer .05 in. wg

Total static pressure = .80 in. wg

Enter the Fan Performance table for 581B--048115 vertical discharge unit on page 27. At 1600 cfm, the standard motor will deliver 1.1 in. wg static pressure and 1.17 Bhp. This will adequately handle the job requirements.

Using evaporator-fan motor efficiency table and formula on page 40, determine watts.

Watts =

Watts = 116 4

V DETERMINE NET COOLING CAPACITY.

Cooling capacities are gross and do not include indoor-fan motor (IFM) heat. Determine net capacity using the following formula:

Net capacity = gross capacity – IFM heat

Net capacity = 44,928 Btuh

Net sensible capacity = 37,481 Btuh – 3972 Btuh

1.17 (746) .75

= 48,900 Btuh – 1164 Watts

(3.413

= 48,900 Btuh – 3972 Btuh

= 33,509 Btuh

Btuh

Watts

)

581B048 (4 TONS)

Tem p (F)

Air Ent

Condenser

(Edb)

SHC kW

105

SHC kW

115

SHC kW

125

SHC kW

PERFORMANCE DATA

COOLING CAPACITIES

581B036 (3 TONS)

Temp ( F )

Air Ent

Condenser

(Edb)

105

115

125

TC SHC kW

900/0.14 1200/0.17 1500/0.20

72 67 62 72 67 62 72 67 62

41.9 38.7 35.7 43.5 40.8 37.7 44.8 41.8 39.0

20.4 25.2 29.7 21.8 28.2 33.8 23.3 30.7 37.0

2.19 2.16 2.12 2.21 2.18 2.15 2.23 2.19 2.16

40.7 37.5 34.5 42.1 39.3 36.4 43.5 40.4 37.6

19.9 24.7 29.2 21.5 27.7 33.2 23.2 30.3 36.4

2.46 2.42 2.39 2.47 2.44 2.41 2.50 2.45 2.42

39.3 36.1 33.1 40.8

19.5 24.1 28.4 21.1

2.75 2.71 2.66 2.77

37.7 34.6 31.7 39.3 36.2 33.4 40.1 37.2 34.7

18.8 23.5 27.8 20.7 26.6 31.8 22.1 29.3 34.7

3.06 3.02 2.98 3.09 3.04 3.01 3.10 3.06 3.03

36.0 33.0 29.7 37.4 34.5 31.5 38.1 35.5 33.2

18.3 22.9 26.7 19.9 26.1 30.9 21.3 28.7 33.2

3.41 3.36 3.31 3.43 3.39 3.34 3.44 3.41 3.37

34.2 31.3 27.8 35.6 32.7 29.4 36.3 33.6 31.9

17.6 22.2 25.8 19.4 25.4 29.4 20.8 28.0 31.8

3.78 3.73 3.66 3.80 3.76 3.71 3.81 3.78 3.75

1200/0.17 1450/0.19 1600/0.21 2000/0.24

72 67 62 72 67 62 72 67 62 72 67 62

54.0 50.7 44.2 55.9 52.2 47.7 56.4 52.8 49.1 58.1 54.5 50.6

26.1 32.7 37.5 27.6 35.1 41.8 28.2 36.2 43.8 30.2 39.5 47.5

2.81 2.80 2.76 2.83 2.81 2.78 2.83 2.80 2.79 2.84 2.82 2.79

52.2 48.9 41.9 54.1 50.4 45.9 54.5 51.0 47.2 55.3 52.3 48.7

25.4 32.0 36.4 26.9 34.5 40.8 27.5 35.7 42.8 28.6 38.5 46.6

3.20 3.19 3.15 3.22 3.20 3.17 3.22 3.20 3.18 3.22 3.20 3.18

50.7 46.9 39.5 51.9

24.9 31.1 35.0 26.1

3.64 3.61 3.57 3.65

48.8 44.5 36.7 49.8 46.2 40.7 50.2 46.7 42.1 51.5 48.2 44.7

24.3 30.2 33.6 25.3 32.8 38.2 26.0 33.9 40.3 27.9 37.4 44.4

4.12 4.09 4.03 4.12 4.09 4.06 4.12 4.09 4.07 4.14 4.11 4.08

46.5 41.1 34.3 47.7 43.3 37.0 48.0 44.4 38.5 48.9 45.7 42.0

23.4 28.9 32.4 24.9 31.8 36.3 25.4 33.4 38.3 27.1 36.9 42.0

4.64 4.59 4.53 4.65 4.62 4.55 4.64 4.63 4.56 4.65 4.63 4.60

43.8 37.5 32.4 45.1 39.0 33.8 45.3 40.1 35.4 46.3 42.6 38.8

22.5 27.4 31.5 24.1 30.2 33.7 24.7 31.9 35.4 26.5 35.9 38.8

5.19 5.13 5.05 5.20 5.15 5.09 5.19 5.17 5.11 5.20 5.19 5.15

Temp (F) Air Entering Evaporator — Cfm/BF

Temp (F) Air Entering Evaporator — Ewb

37.8 34.9 42.0 38.9 36.1

27.2 32.5 22.8 29.9 35.6

2.73 2.69 2.79 2.74 2.71

Temp (F) Air Entering Evaporator — Cfm/BF

Temp (F) Air Entering Evaporator — Ewb (F)

48.4 43.5 52.5 48.9 45.2 53.9 50.1 46.7

33.6 39.6 26.8 34.7 41.8 28.8 37.5 45.6

3.62 3.60 3.65 3.62 3.60 3.67 3.63 3.61

Standard Ratings

LEGEND

BF — Edb — Ewb — kW — SHC — TC —

Bypass Factor Entering Dry Bulb Entering Wet Bulb Compressor Motor Power Input Sensible Heat Capacity (1000 Btuh) Gross Total Capacity (1000 Btuh) Gross

NOTES:

1. Direct interpolation is permissible. Do not extrapolate.

2. The following formulas may be used:

ldb

= wet-bulb temperature corresponding to enthalpy of air

lwb

Where h

sensible heat capacity (Btuh)

–

edb

leaving indoor coil (h

–

ewb

= Enthalpy of air entering indoor coil.

ewb

1.10 x cfm

)

lwb

total capacity (Btuh)

4.5 x cfm

3. The SHC is based on 80 F edb temperature of air entering evaporator coil. Below 80 F db, subtract (corr factor x cfm) from SHC.

Above 80 F db, add (corr factor x cfm) to SHC

Correction Factor = 1.10 x (1 – BF) x (db – 80).

581B060 (5 TONS)

Tem p (F)

Air Ent

Condenser

(Edb)

SHC kW

105

SHC kW

115

SHC kW

125

SHC kW

581B072 (6 TONS)

Tem p (F)

Air Ent

Condenser

(Edb)

SHC kW

105

SHC kW

115

SHC kW

125

SHC kW

PERFORMANCE DATA (cont)

COOLING CAPACITIES (cont)

Temp (F) Air Entering Evaporator — Cfm/BF

1500/0.08 1750/0.09 2000/0.11 2500/0.13

Temp (F) Air Entering Evaporator — Ewb (F)

72 67 62 72 67 62 72 67 62 72 67 62

70.8 65.4 58.5 72.5 67.3 61.1 73.0 68.4 62.8 74.8 70.3 64.8

34.1 42.7 49.9 35.7 45.5 54.2 36.8 48.0 57.8 39.6 53.0 63.4

3.53 3.49 3.44 3.55 3.50 3.46 3.55 3.51 3.47 3.57 3.54 3.48

68.9 63.2 55.3 70.5 65.1 57.9 72.2 66.4 60.2 73.2 68.1 62.9

33.5 41.8 48.4 35.0 44.8 52.8 37.0 47.6 56.8 39.3 52.5 62.4

3.98 3.94 3.87 4.00 3.96 3.90 4.03 3.97 3.92 4.04 3.99 3.94

66.8 60.6 52.4 68.3

32.8 40.7 47.0 34.5

4.48 4.43 4.35 4.50

64.3 57.7 49.9 65.9 59.8 51.7 66.9 61.1 54.1 68.4 62.8 58.4

32.0 39.6 45.8 33.7 42.8 49.7 35.3 45.7 53.5 38.4 51.0 58.4

5.03 4.96 4.87 5.05 4.99 4.90 5.06 5.00 4.93 5.08 5.02 4.98

61.5 54.8 47.3 62.8 56.7 49.1 64.0 58.2 51.6 65.4 59.9 56.1

31.0 38.4 44.5 32.5 41.6 48.2 34.4 44.6 51.6 37.4 50.0 56.1

5.61 5.55 5.46 5.62 5.58 5.49 5.65 5.60 5.52 5.67 5.61 5.57

58.7 51.6 44.5 59.9 53.4 46.2 60.8 54.9 49.0 62.2 56.8 53.5

30.0 37.2 43.1 31.7 40.4 46.2 33.3 43.4 48.9 36.4 48.9 53.4

6.27 6.19 6.09 6.28 6.21 6.13 6.29 6.24 6.17 6.31 6.27 6.22

1800/0.05 2100/0.06 2400/0.06 3000/0.08

72 67 62 72 67 62 72 67 62 72 67 62

86.7 80.7 74.4 88.8 82.7 76.6 90.5 84.4 78.2 92.6 86.3 81.0

43.0 53.7 63.8 45.0 57.4 68.9 47.2 61.2 73.6 51.2 67.4 80.7

4.58 4.46 4.33 4.63 4.50 4.38 4.67 4.55 4.41 4.72 4.58 4.47

84.1 78.2 72.0 86.4 80.3 74.1 88.2 81.7 75.7 90.2 84.0 78.8

42.0 52.6 62.7 44.5 56.6 68.0 46.8 60.2 72.5 50.6 67.4 78.7

5.10 4.97 4.85 5.16 5.03 4.90 5.21 5.06 4.93 5.26 5.12 4.99

81.3 75.3 69.2 83.4

41.0 51.4 61.4 43.4

5.65 5.52 5.39 5.71

77.9 72.0 66.1 80.0 73.8 68.0 81.6 75.3 69.6 83.4 77.1 73.2

39.7 50.2 60.0 42.2 54.0 65.2 44.6 57.8 69.3 49.0 64.5 73.2

6.22 6.08 5.94 6.29 6.13 6.00 6.34 6.17 6.04 6.40 6.22 6.12

74.7 68.4 61.8 75.9 70.0 64.1 77.6 71.3 66.5 78.7 73.0 70.1

38.7 48.8 58.1 40.8 52.6 63.2 43.3 56.4 66.4 46.9 63.2 70.0

6.84 6.68 6.49 6.87 6.71 6.56 6.93 6.75 6.63 6.96 6.80 6.72

70.3 63.6 57.2 71.8 65.5 59.1 72.9 66.8 61.9 74.0 68.6 66.4

37.2 47.0 55.8 39.5 51.0 59.1 41.7 55.0 61.9 45.4 61.8 66.3

7.43 7.25 7.03 7.48 7.30 7.13 7.51 7.35 7.22 7.54 7.41 7.33

62.5 54.3 69.3 63.8 56.6 71.2 65.6 60.6

43.8 51.1 36.0 46.7 55.0 39.1 51.8 60.5

4.45 4.37 4.51 4.46 4.40 4.55 4.48 4.44

Temp (F) Air Entering Evaporator — Cfm/BF

Temp (F) Air Entering Evaporator — Ewb (F)

77.3 71.3 85.1 78.9 72.9 87.2 80.6 76.2

55.3 66.6 45.8 59.2 71.2 50.2 65.8 76.2

5.57 5.44 5.77 5.62 5.48 5.83 5.66 5.55

Standard Ratings

LEGEND

BF — Edb — Ewb — kW — SHC — TC —

Bypass Factor Entering Dry Bulb Entering Wet Bulb Compressor Motor Power Input Sensible Heat Capacity (1000 Btuh) Gross Total Capacity (1000 Btuh) Gross

NOTES:

1. Direct interpolation is permissible. Do not extrapolate.

2. The following formulas may be used:

ldb

= wet-bulb temperature corresponding to enthalpy of air

lwb

Where h

3. The SHC is based on 80 F edb temperature of air entering evaporator coil. Below 80 F db, subtract (corr factor x cfm) from SHC.

Above 80 F db, add (corr factor x cfm) to SHC

sensible heat capacity (Btuh)

–

edb

leaving indoor coil (h

–

ewb

= Enthalpy of air entering indoor coil.

ewb

1.10 x cfm

)

lwb

total capacity (Btuh)

4.5 x cfm

Correction Factor = 1.10 x (1 – BF) x (db – 80).

581B090 (7

Temp ( F )

Air Ent

Condenser

(Edb)

105

115

125

/2 TONS)

TC SHC kW

PERFORMANCE DATA (cont)

COOLING CAPACITIES (cont)

Temp (F) Air Entering Evaporator — Cfm/BF

2250/0.10 3000/0.11 3750/0.14

Temp (F) Air Entering Evaporator — Ewb

72 67 62 72 67 62 72 67 62

105.5 96.9 87.6 107.3 99.6 90.7 110.3 101.9 93.8

50.6 63.6 75.7 53.3 69.2 83.7 58.0 76.6 92.2

5.15 5.07 5.04 5.16 5.11 5.06 5.20 5.13 5.07

102.5 93.6 83.6 105.1 96.5 87.5 107.7 99.0 90.6

49.7 62.4 73.9 52.8 68.4 82.2 57.3 75.9 90.0

5.86 5.79 5.73 5.89 5.82 5.77 5.93 5.86 5.78

98.9 90.1 79.3 101.6

48.5 61.2 71.9 51.9

6.65 6.58 6.49 6.69 6.61 6.53 6.72 6.64 6.57

95.3 86.2 75.7 97.6 88.8 79.6 100.0 91.0 84.1

47.3 59.6 70.2 50.7 65.9 78.0 55.3 73.6 84.1

7.51 7.44 7.31 7.55 7.48 7.36 7.59 7.50 7.41

91.0 82.0 71.6 93.2 84.5 75.4 95.6 86.6 80.7

45.9 58.0 68.1 49.3 64.2 75.3 54.2 72.1 80.7

8.43 8.33 8.20 8.46 8.37 8.27 8.52 8.42 8.34

86.2 77.8 68.1 88.3 80.0 71.9 90.0 81.9 77.2

44.1 56.4 66.3 47.5 62.6 71.8 52.1 70.1 77.2

9.38 9.29 9.14 9.43 9.34 9.24 9.47 9.38 9.32

92.9 83.5 103.8 95.3 87.4

67.2 80.2 56.2 74.9 87.3

581B102 (8

Tem p (F)

Air Ent

Condenser

(Edb)

105

115

125

Standard Ratings

BF — Edb — Ewb — kW — SHC — TC —

/2 TONS)

2550/0.08 3000/0.09 3400/0.11 4250/0.13

72 67 62 72 67 62 72 67 62 72 67 62

TC SHC kW

119.5 105.7 94.8 123.1 109.1 98.7 124.8 110.7 100.2 126.3 112.8 103.4

56.5 65.7 77.8 60.2 71.7 86.3 62.2 75.8 92.8 67.8 83.3 101.2

5.92 5.84 5.77 5.95 5.88 5.81 5.96 5.89 5.83 5.99 5.91 5.85

115.5 101.9 90.6 119.7 105.4 94.8 121.4 106.9 96.1 124.0 109.1 98.7

55.1 64.3 76.1 58.9 70.5 85.1 61.3 74.5 90.5 66.2 82.9 98.5

6.77 6.69 6.61 6.83 6.74 6.67 6.85 6.76 6.67 6.88 6.79 6.71

111.3 97.7 86.6 115.0

53.7 62.8 74.2 57.4

7.71 7.62 7.52 7.76 7.68 7.59 7.80 7.69 7.58 7.84 7.74 7.66

107.2 93.5 82.5 110.5 96.7 85.9 112.1 97.9 87.6 114.9 99.9 90.5

52.2 61.3 72.7 56.0 67.4 81.2 58.4 71.4 86.6 63.5 79.5 90.5

8.75 8.64 8.54 8.80 8.70 8.61 8.82 8.71 8.62 8.86 8.75 8.67

101.9 89.2 78.0 104.7 91.8 81.5 106.7 93.1 83.3 109.2 94.9 86.3

50.2 59.5 70.7 53.7 65.7 79.5 56.6 69.5 83.1 61.5 77.8 86.3

9.80 9.73 9.64 9.86 9.79 9.72 9.90 9.79 9.71 9.95 9.84 9.75

97.3 84.3 73.1 100.0 86.8 76.0 101.3 87.9 78.7 102.9 89.5 81.9

48.7 57.7 68.5 52.4 63.9 76.0 54.8 67.9 78.7 59.1 75.7 81.9

11.03 10.90 10.70 11.08 10.96 10.81 11.11 10.99 10.88 11.14 11.03 10.93

LEGEND

Bypass Factor Entering Dry Bulb Entering Wet Bulb Compressor Motor Power Input Sensible Heat Capacity (1000 Btuh) Gross Total Capacity (1000 Btuh) Gross

Temp (F) Air Entering Evaporator — Cfm/BF

Temp (F) Air Entering Evaporator — Ewb

101.2 90.6 117.2 102.6 91.7 120.1 104.8 94.5

68.9 82.9 60.0 73.0 88.6 65.0 81.5 94.5

NOTES:

1. Direct interpolation is permissible. Do not extrapolate.

2. The following formulas may be used:

ldb

= wet-bulb temperature corresponding to enthalpy of air

lwb

Where h

3. The SHC is based on 80 F edb temperature of air entering evap-

sensible heat capacity (Btuh)

–

edb

leaving indoor coil (h

–

ewb

= Enthalpy of air entering indoor coil.

ewb

1.10 x cfm

)

lwb

total capacity (Btuh)

4.5 x cfm

orator coil. Below 80 F db, subtract (corr factor x cfm) from SHC.

Above 80 F db, add (corr factor x cfm) to SHC

Correction Factor = 1.10 x (1 – BF) x (db – 80).

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Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B, DuraPac Plus 581B User Manual

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