Bryant 574B User Manual

SINGLE-PACKAGED
GAS HEATING/ELECTRIC
COOLING UNITS

UNIT 574B

Single-Packaged Rooftop Products with Energy-Saving Fea­tures and Puron® refrigerant.

• Direct Spark Ignition

• Low Sound Levels

• Up to 81% AFUE

• 13 SEER

• Variable Speed Blower Standard

• Factory Installed TXV

FEATURES/BENEFITS

One-piece heating and cooling units with low sound levels, easy
installation, low maintenance, and dependable performance.

Puron® Environmentally Sound Refrigerant

unique refrigerant designed to help protect the environment.
Puron is an HFC refrigerant which does not contain chlorine that
can harm the ozone layer. The most important advantage of
Puron refrigerant is that it has not been banned in future air con­ditioning systems as the traditional refrigerant R-22 has been.
Puron refrigerant is in service in thousands of systems proving
highly reliable, environmentally sound performance.

Perfect Heat, Perfect Humidity™ featuring Variable Speed
Blower motors

You can expect up to 30 times better dehumidification; economi­cal constant fan for less than $50 a year, which provides improved
indoor air quality and more even temperatures from room to room;
and reduced indoor noise due to lower air velocity. In addition,
you’ll realize improved installation flexibility with 3 different airflow
choices for best overall comfort.

provides better comfort and energy efficiency.

is Bryant’s

Model 574B
Sizes 024-060

2 to 5 Nominal Tons

Low NOx Models Available

EASY INSTALLATION

pact, fully self-contained, combination gas heating/electric cool­ing unit that is pre-wired, pre-piped, and pre-charged for
minimum installation expense.

These units are available in a variety of standard and optional
heating/cooling size combinations with voltage options to meet
residential and light commercial requirements. Units are light­weight and install easily on a rooftop or at ground level. The high
tech composite unit base eliminates rust problems associated
with ground level applications.

CONVERTIBLE DUCT CONFIGURATION

for easy use in either downflow or horizontal applications. Each
unit is easily converted from horizontal to downflow.

EFFICIENT OPERATION
High-efficiency design

ciency Ratios) of 13.0 and AFUE (Annual Fuel Utilization Effi­ciency) ratings as high as 81%.

Energy-saving, direct spark ignition

only when the room thermostat calls for heating. Standard units
are furnished with natural gas controls. A low-cost field-installed
kit for propane conversion is available for all units.

574B units with an “N” in the thirteenth position of model #
are dedicated Low NOx units

tions. These models meet the California maximum oxides of ni­trogen (NOx) emissions requirement of 40 nanograms/joule or
less as shipped from the factory and MUST be installed in Cali­fornia Air Quality Management Districts where a Low NOx rule
exists.

DURABLE, DEPENDABLE COMPONENTS
Compressors

sor is hermetically sealed against contamination to help promote
longer life and dependable operation. Each compressor also has
vibration isolation to provide quieter operation. All compressors
have internal high pressure and overcurrent protection.

Monoport inshot burners

which provides for clean and efficient combustion. The large
monoport on the inshot (or injection type) burners seldom, if
ever, requires cleaning. All gas furnace components are acces­sible in one compartment.

Turbo-tubular™ heat exchangers

nized steel for corrosion resistance and optimum heat transfer
for improved efficiency. The tubular design permits hot gases to
make multiple passes across the path of the supply air.

In addition, dimples located on the heat exchanger walls force
the hot gases to stay in close contact with the walls, improving
heat transfer.

Direct-drive variable speed (ECM) blower motor

on all 574B models.

Direct-drive, PSC condenser-fan motors

reduce energy consumption and provide for cooling operation
down to 55°F outdoor temperature. Motormaster® II low ambient
kit is available as a field-installed accessory.

are designed for high efficiency. Each compres-

—Factory-assembled package is a com-

—Unit is designed

offers SEER (Seasonal Energy Effi-

saves gas by operating

designed for California installa-

produce precise air-to-gas mixture,

are constructed of alumi-

is standard

are designed to help

Form No. PDS 574B.24.1

P

P

Corporate thermostats include the Time Guard® II anti-short

cycle protection circuitry. If a non-corporate thermostat without
anti-short cycle protection is used the Time Guard II field in­stalled anti-short cycle kit is recommended.

Refrigerant system is designed to provide dependability. Liquid

filter dryers are used to promote clean, unrestricted operation.
Each unit leaves the factory with a full refrigerant charge. Refrig­erant service connections make checking operating pressures
easier.

HIGH AND LOW PRESSURE SWITCHES

provide added reli-

ability for the compressor.

Evaporator and condenser coils

are computer-designed for
optimum heat transfer and cooling efficiency. The evaporator
coil is fabricated from copper tube and aluminum fins and is lo­cated inside the unit for protection against damage. The con­denser coil is internally mounted on the top tier of the unit.
Copper fin coils and pre-coated fin coils are available from the
factory by special order. These coils are recommended in appli­cations where aluminum fins are likely to be damaged due to
corrosion. They are ideal for seacoast applications.

Low sound ratings

ensure a quiet indoor and outdoor environ-

ment with sound ratings as low as 72 dB. (See page 3.)

Easy to service cabinets provide easy single-panel accessibility

to serviceable components during maintenance and installation.
The unit base with integrated drain pan provides easy ground lev­el installation with or without a mounting pad. Convenient rigging

holds are provided to manipulate the unit on the jobsite. A nesting
feature ensures a positive unit base to roof curb seal when the unit
is roof mounted. A convenient 3/4-in. wide perimeter flange
makes frame mounting on a rooftop easy.

Standard metal duct covers with insulation come with the unit

and cover the horizontal duct openings. These can be left in place
if the units are converted to downflow.

Downflow operation is easily provided in the field to allow ver-

tical ductwork connections. The basepan utilizes knockout style
seals on the bottom openings to ensure a positive seal in the
horizontal airflow mode.

Integrated Gas Control (IGC) board provides safe and efficient

control of heating and simplifies trouble-shooting through its
built-in diagnostic function.

Cabinets are constructed of heavy-duty, phosphated, zinc-

coated prepainted steel capable of withstanding 500 hours in
salt spray. Interior surfaces of the evaporator/heat exchanger
compartment are insulated with cleanable semi-rigid insulation
board, which keeps the conditioned air from being affected by
the outdoor ambient temperature and provides improved indoor
air quality. (Conforms to American Society of Heating, Refriger­ation and Air Conditioning Engineers No. 62P.) The sloped drain
pan minimizes standing water in the drain, which is provided with
an external drain fitting.

Louvered Grille

provides hail and vandalism protection.

574B N W 024 040 N VS

Model Number
574B – Single

Packaged Gas
Heating/Electric
Cooling

Electrical Supply
N – 208/230-1-60

– 208/230-3-60

Fuel
W – Natural Gas

– Propane Gas

Nominal Cooling Capacity
024 – 2 ton
030 – 2.5 ton (not yet available)
036 – 3 ton
042 – 3.5 ton (not yet available)
048 – 4 ton
060 – 5 ton

MODEL NUMBER NOMENCLATURE

Options

BT

– AL evap, vinyl condens

CC

– AL evap, CU condens

CU

– CU evap & condens

TP

– Base unit with tin plated indoor coil

TV

– TP with vinyl coating on outdoor coil

TC

– TP with AL indoor coil and CU/CU

Only used if ordering an option

Low NO
N

– Low NO

Only used if ordering NO

Heat Input Size
040 – 40,000
060 – 60,000
090 – 90,000
115 – 115,000
130 – 130,000

hair pins

outdoor coil

Indicator

x

Unit

x

units

x

CU

— Copper

AL

— Aluminum

LEGEND

—2—

db

wb

ARI* CAPACITIES

COOLING CAPACITIES AND EFFICIENCIES

UNIT 574B NOMINAL TONS STANDARD CFM

024040

030040
036060

036060
036090

042060
042090

048090
048115
048130

060090
060115
060130

LEGEND

dB — Decibels

— Dry Bulb

SEER — Seasonal Energy Efficiency Ratio

— Wet Bulb

* Air Conditioning & Refrigeration Institute.

† Rated in accordance with U.S. Government DOE (Department of

Energy) test procedures and/or ARI Standard 210/240-89.

‡“A” conditions — 80°F db/67°F wb Indoor and 95°F db outdoor

** Tested in accordance with ARI Standard 270-95 (not listed in ARI).

2 800 24,000 11.0 13.0 72

2-1/2

3 1150 36,000 11.0 13.0 72

3-1/2 11.0

4 1450 45,000 11.0 13.0 78

5 1750 57,000 11.0 13.0 78

NET COOLING

CAPACITIES (Btuh)

NOTES:

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

Cooling Standard: 80°F db, 67°F wb indoor entering-air tempera-

ture and 95°F db outdoor entering-air temperature.

2. Before purchasing this appliance, read important energy cost and
efficiency information available from your retailer.

EER
@A‡

SEER†

SOUND RATINGS**

(dB)

TABLE OF CONTENTS

Page

Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4

Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8

Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10

Accessory Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Selection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-18

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Application Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Typical Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . 22,23

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27,28

—3—

ARI* CAPACITIES (cont)

HEATING CAPACITIES AND EFFICIENCIES

UNIT 574B

024040
030040

030060
036060
042060

036090
042090
048090
060090

048115
060115

048130
060130

HEATING INPUT

(Btuh)

40,000 31,000 20-50 80.1

60,000

90,000
90,000
90,000
90,000

115,000 92,000 35-65 81.1

130,000

OUTPUT CAPACITY

(Btuh)

46,000
46,000
47,000

70,000
71,000
70,000
70,000

104,000
103,000

TEMPERATURE RISE

RANGE (°F)

35-65
25-55
20-50

45-75
35-65
25-55
25-55

40-70 80.3

LEGEND
AFUE — Annual Fuel Utilization Efficiency
NOTE: Before purchasing this appliance, read important energy cost and efficiency information available from your retailer.

T

O

D

E

A

I

R

F

I

I

T

A

R

S

E

C

R

E

R

U

T

C

A

F

U

N

A

5

2

3

2

A

M

A

R

C

O

A

M

I

R

C

P

O

Y

R

A

T

I

N

U

I

S

T

L

N

D

Y

I

T

I

N

I

O

G

N

I

N

W

G

I

T

E

H

T

Q

N

U

E

I

P

M

0

1

2

D

A

R

N

A

D

AFUE

78.4

78.7

78.7

79.9

79.9

78.6

78.6

OUTDOOR SOUND: OCTAVE BAND DATA — DECIBELS (Lw(A))

MODEL NO. 574B

Frequency (Hz) 024 030 036 042 048 060

125

250

500

1000

2000

4000

8000

57.5 — 60.7 — 62.4 64.1

61.1 — 63.3 — 69.9 68.6

68.0 — 66.8 — 71.3 71.2

68.4 — 66.5 — 73.4 73.9

64.5 — 64.2 — 70.0 69.8

59.0 — 60.3 — 66.3 68.1

51.7 — 53.0 — 60.1 61.8

—4—

1

PHYSICAL DATA

UNIT SIZE 574B 024040 030040 030060 036060 036090 042060 042090

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (lb)

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb)

REFRIGERANT METERING DEVICE

Indoor

CONDENSER COIL

Rows—Fins/in.
Face Area (sq ft)

CONDENSER FAN

Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)

EVAPORATOR COIL

Rows—fins/in.
Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)
Size (in.)
Motor Hp (Rpm)

FURNACE SECTION*

Burner Orifice No. (Qty…Drill Size)

Natural

Burner Orifice No. (Qty…Drill Size)

Propane

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto.)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto.)

RETURN-AIR FILTERS (in.)†

Throwaway

†

Required filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated cooling air-

flow or the heating airflow velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. Air filter pressure
drop for non-standard filters must not exceed 0.08 in. wg.

*

Based on altitude of 0 to 2000 ft.

2 2-1/2 2-1/2 3 3 3-1/2 3-1/2

350 388 388

Scroll

7.3 9.5 9.5

TXV

2/21

11.95

2350

22

1/8 (825)

3/15

3.7

800

10 x 10

1/2

2…44

2…50

20 x 24 x 1 20 x 24 x 1 20 x 24 x 1 20 x 24 x 1 20 x 24 x 1 24 x 30 x 1 24 x 30 x 1

2/21

13.7

2350

22

1/8 (825)

4/15

3.7

1150

11 x 10

3/4

2…38

2…46

610 ± 15
420 ± 25

20 ± 5

45 ± 10

2/21

13.7

2350

22

1/8 (825)

4/15

3.7

1150

11 x 10

3/4

3…38

3…46

—5—

PHYSICAL DATA (cont)

UNIT SIZE 574B 048090 048115 048130 060090 060115 060130

NOMINAL CAPACITY (ton)

OPERATING WEIGHT (lb)

COMPRESSORS

Quantity

REFRIGERANT (R-410A)

Quantity (lb)

REFRIGERANT METERING DEVICE

Indoor

CONDENSER COIL

Rows—Fins/in.

Face Area (sq ft)

CONDENSER FAN

Nominal Cfm
Diameter (in.)
Motor Hp (Rpm)

EVAPORATOR COIL

Rows—fins/in.
Face Area (sq ft)

EVAPORATOR BLOWER

Nominal Airflow (Cfm)
Size (in.)
Motor Hp (Rpm)

FURNACE SECTION**

Burner Orifice No. (Qty…Drill Size)

Natural Gas

Burner Orifice No. (Qty…Drill Size)

Propane Gas

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto.)

LOSS-OF-CHARGE/LOW-PRESSURE SWITCH

(Liquid Line) (psig)

Cutout

Reset (Auto.)

RETURN-AIR FILTERS (in.)

Throwaway†

Required filter sizes shown are based on the larger of the ARI (Air Conditioning & Refrigeration Institute) rated cooling air-

†

flow or the heating airflow velocity of 300 ft/min for throwaway type or 450 ft/min for high-capacity type. Air filter pressure
drop for non-standard filters must not exceed 0.08 in. wg.
Based on altitude of 0 to 2000 ft.

**

444555

463 463 463 499 499 499

Scroll

11.25 11.25 11.25 13.5 13.5 13.5

TXV

2/21 2/21 2/21 2/21 2/21 2/21

17.4 17.4 17.4 19.3 19.3 19.3

3300

22

1/4 (1100)

4/15

4.7

1400

11 x 10

3/4

3…38

3…46

24 x 30 x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1

3300

22

1/4 (1100)

4/15

4.7

1400

11 x 10

3/4

3…33

3…42

3300

22

1/4 (1100)

4/15

4.7

1400

11 x 10

3/4

3…31

3…41

610 ± 15
420 ± 25

20 ± 5

45 ± 10

3300

22

1/4 (1100)

4/17

5.7

1750

11 x 10

1.0

3…38

3…46

3300

22

1/4 (1100)

4/17

5.7

1750

11 x 10

1.0

3…33

3…42

3300

22

1/4 (1100)

4/17

5.7

1750

11 x 10

1.0

3…31

3…41

1

—6—

OPTIONS AND ACCESSORIES

Factory-installed options

Coil options include Tin-Plated* indoor hairpins, copper/copper

and vinyl-coated construction for refrigerant coils. Units are
shipped standard with copper tube/aluminum fin construction.
See model number nomenclature for coil options.

*Tin-Plated indoor coils are built with special hairpins that are de­signed to resist both general pitting corrosion and excessive in­door corrosion (Formicary Corrosion).

Field-installed accessories

Economizer with Solid-State Controls and Barometric Relief Dampers

Manual Air Damper (25% open)

Filter Rack

Roof Curbs (8-in. and 14-in.)

Square-to-Round Duct Transition Kit

Thermostats

Crankcase Heater

Compressor Hard Start Kit (for use on single-phase units only)

LP Conversion Kit

High Altitude Kit

Low Ambient Kit (Motormaster® II Control)

Solid-State Time Guard® II Device

Lifting Kit

LP to Natural Conversion Kit

Economizer with solid-state controls and barometric relief
dampers includes filter racks and provide outdoor air during

cooling and reduce compressor operation.

Manual outside air damper includes hood and filter rack with
adjustable damper blade for up to 25% outdoor air.

Flat roof curbs in both 8 in. and 14 in. sizes are available for
roof mounted applications.

Square-to-round duct transition kit enables 024-048 size
units to be fitted to 14 in. round ductwork.

Compressor hard start kit assists compressor start-up by pro­viding additional starting torque on single phase units and pro­longs compressor motor life.

Thermostats provide control for the system heating and cooling
functions. Thermostat models are available in both programma­ble and non-programmable versions.

Crankcase heater provides anti-floodback protection for low­load cooling applications.

LP (liquid propane) conversion kit allows for conversion from
natural gas to liquid propane fuel.

Low-ambient kit (Motormaster® II control) allows the use of
mechanical cooling down to outdoor temperatures as low as 0°F.

Solid-state Time Guard® II device provides short-cycling pro­tection for the compressor. Not required with corporate electron­ic thermostats.

Filter rack features easy installation, serviceability, and high­filtering performance for vertical applications.

High altitude kit is for use at 2001 to 6000 ft above sea level.
Kit consists of natural gas orifices that compensate for gas heat
operation at high altitude.

LP to natural gas conversion kit allows conversion back to
natural gas.

Lifting kit includes rigging brackets which are inserted into the
unit base rigging holds to rig unit for rooftop applications.

—7—

Economizer

DOOR
LATCH ANGLE

HINGED FILTER
ACCESS DOOR

17 13/32

(442mm)
11 13/32”
(290mm)

INSTALL
FILTER ACCESS
DOOR STICKER

16 1/4”
(413mm)

FILTER ACCESS DOOR
(HORIZONTAL
APPLICATION ONLY.)
DO NOT REMOVE
FROM DOWNFLOW
DISCHARGE.

REPLACEMENT
PANEL

HOLE FOR
ECONOMIZER
WIRING HARDNESS

RAINHOOD

ALUMINUM
FILTER

A99315

Filter Rack

A99314

Manual Outside Air Damper

REPLACEMENT
PANEL

MANUAL OUTSIDE
AIR HOOD

DAMPER
BLADE

A99317

A99316

—8—

BASE UNIT DIMENSIONS — 574B024-036

REQ’D CLEARANCES FOR OPERATION AND SERVICING. in. (mm)

Evaporator coil access side ..................36(914)

Power entry side (except for NEC requirements) .........36(914)

Unit top ..........................48(1219)

Side opposite ducts .....................36(914)

Duct panel ........................12(304.8)*

*Minimum distances: If unit is placed less than 12 in. (304.8 mm) from wall

system, then the system performance may be compromised.

LEGEND
CG - Center of Gravity
COND - Condenser
EVAP - Evaporator
NEC - National Electrical Code
REQ'D - Required
Note: Dimensions are in in. (mm)

REQ’D CLEARANCES TO COMBUSTIBLE MAT’L. in. (mm)

Top of unit .........................14(355.6)

Duct side of unit .......................2(50.8)

Side opposite ducts .....................14(355.6)

Bottom of unit .......................0.50 (12.7)

Flue panel .........................36(914.4)

NEC REQ’D CLEARANCES. in. (mm)

Between units, power entry side ..............42(1066.8)

Unit and ungrounded surfaces, power entry side .........36(914)

Unit and block or concrete walls and other grounded

control box side

surfaces,

.................42(1066.8)

CENTER OF GRAVITY

IN. [MM]

UNIT

ELECTRICAL

CHARACTERISTICS

UNIT WEIGHT

lb. kg. X Y Z

UNIT HEIGHT

IN. [MM]

“A”

574B024040 208/230-1-60 350 159 39.02 [991.1] 20 [508] 19.3 [489] 17.6 [447]

574B030040/060 208/230-1-60

574B036060/090

208/230-1-60
208/230-3-60

388 176 41.02 [1041.9] 20 [508] 14 [355.6] 13 [330.2]

—9—