Bryant | 551B | Specifications | Bryant 551B Specifications

Model 551B
COMMERCIAL
SINGLE PACKAGE ROOFTOP
ELECTRIC COOLING UNITS
DuraPac Plus Series
Sizes 036-150
3 to 121/2 Tons
551B036-072
Bryant has designed these units based on customer needs
and requests to be the most efficient and reliable rooftop units
ever made.
FEATURES/BENEFITS
• Most efficient cooling in the industry using scroll
compressors
• Full range of electric heat sizes available — exactly the right
size for your needs.
• High reliability — non-corrosive condensate pans, prepainted cabinets and primed interior panels, and all units are
fully protected by internal safeties
• Quietest operation in the industry — all compressors
mounted on independent vibration isolators. Standard beltdriven evaporator fan motors on all units
• Ease of maintenance achieved by standard size filters,
optional direct digital controls, tool-less filter access, simple
compressor access, permanently lubricated belt driven fan
motors, optional disconnect switch, optional 115-v convenience outlet, and optional hinged access panels
• Perfect Humidity™ dehumidification package. This factory
installed option improves the dehumidification capability of
the rooftop unit and helps control humidity levels in the conditioned space.
BRYANT MEANS TOP QUALITY AND RELIABILITY — Each
component utilized in these units 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 the unit for life. The standard safeties
include:
• low-pressure/loss-of-charge switch
• high-pressure switch
• freeze-protection thermostat
551B090-150
• internal compressor overload
• exclusive Cycle-LOC™ circuit board that provides compressor anti-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 internal cabinet panel 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 for fit-up to standard roof curbs. (One accessory curb fits sizes 036-072; another accessory curb fits
sizes 090-150.) The contractor can order and install the roof
curbs early in the construction stage, before decisions on size
requirements have been made.
All Units Feature Roll-Formed Baserail design 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 from vertical to horizontal applications 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 highperformance, belt-driven, evaporator-fan motors enable the
551B036-150 units to operate in most ductwork configurations.
Ductwork Connections are Simplified by the logical 2 to 1
aspect ratio. On vertical discharge units, ductwork attaches
directly to the roof curb.
Thru-the-Bottom Service Connection capability allows
power and control wiring to be routed through the unit basepan
and roof curb (if installed), 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 is 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
Form No. PDS 551B.36.4
to minimize roof penetrations. The bottom drain can be used in
conjunction with the thru-the-bottom connections. An external
trap must be field supplied.
Standard 2-in. Throwaway Filters are easily accessed
through a 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.
Belt-Driven Evaporator-Fan Motors on All Sizes allow maximum on-site flexibility without changing motors or drives.
Low-Voltage Wiring Connections are easily made due to the
terminal board which is conveniently located for quick simple
access.
Single-Point Electrical Power Connections permit easier
wire estimating and connections.
Field-Installed Accessory Electric Heaters are available in a
wide range of capacities. Single-point wiring kit makes installation simple.
QUIET, EFFICIENT OPERATION AND DEPENDABLE
PERFORMANCE
All Units are Equipped with Scroll Compressors that are
fully hermetic with internal vibration isolators for extremely quiet
and highly efficient operation. 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 leak and pressure tested at the
factory. Condenser coils have louvered, aluminum lanced fins to
provide maximum heat transfer for optimum efficiency and easy
cleaning.
Refrigerant Circuit Protection ensures dependability. All units
have standard:
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 evaporator 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 refrigeration system.
5. A fixed orifice metering system precisely controls refrigerant
flow, preventing slugging and floodback, while maintaining
optimum unit performance by metering the circuits
individually.
Two Independent Compressor Circuits (all 090-150 size
units) provide pinpoint comfort control, improved efficiency, and
back-up capability.
BRYANT CONTROLS ADD RELIABILITY, EFFICIENCY, AND
SIMPLIFICATION
The Standard Control System is readily adaptable to all conventional and programmable thermostats.
Patented Cycle-LOC™ Protection System provides protection against compressor cycling by monitoring compressor current. When a lack of compressor current exists, the Cycle-LOC
circuit board locks out the compressors. Cycle-LOC may be
manually reset by simply switching the thermostat to OFF, and
back to the Cooling or AUTO modes. No use of the unit power
disconnect switch is required.
INDOOR-AIR QUALITY (IAQ)
551B units utilize certain key features that assist in improving
the quality of the building air. Sloped condensate pans eliminate
possible biological growth in the rooftop unit. A face-split indoor
coil design (all 090-150 size units) proves effective in additional
moisture removal from the supply air. Two-in. filters are
standard in all rooftop units with an optional filter status sensor
available.
Another Optional Indoor-Air Quality (IAQ) Feature for the
551B unit is the Perfect Humidity™ dehumidification package.
This is a factory-installed option that provides increased dehumidification by cooling the hot liquid refrigerant leaving the condenser coil. The Perfect Humidity option consists of a
subcooling coil located on the leaving-air side of the evaporator
coil. The location of this coil in the indoor airstream enhances
the latent capacity of the 551B units by as much as 40%. Many
buildings suffer from humidity damage or poor indoor air quality
due to humid conditions. The improved latent capacity provided
by the Perfect Humidity option reduces the building’s humidity,
eliminating potential property damage and making the space
more comfortable.
The Perfect Humidity option makes the 551B unit the ideal IAQ
rooftop for hot and humid regions. The operation of the Perfect
Humidity package can be controlled by a field-installed, wallmounted humidistat, or light commercial thermidistat. The circuit activates only when needed (using the accessory humidistat) as opposed to some dehumidification systems that operate
continuously. The humidistat can be set for any humidity level
between 20% and 80% relative humidity.
SERVICEABILITY
Servicing a Rooftop Unit has Never Been Easier with the
new factory-installed Hinged Panel Option. This option includes
hinged access panels for the filter, compressor, evaporator-fan
motor, and control box areas. These panels provide quick and
simple access to the major components by simply unlocking
and swinging open the different panels. Each hinged access
panel is permanently attached to the rooftop unit, eliminating
the problem of access panels being dropped and creating a
hole in the roof (potentially causing a water leak). This type of
damage could void any warranty offered for a new roof.
Standardized Components for the complete line of products
are found in all safety devices, condenser-fan motors, and control boards. This allows for greater inventory control, familiarity,
and fewer stocked parts.
Easily Accessible Refrigerant Access Ports on all discharge, suction, and liquid lines permit easy and accurate
measurements.
Resettable 24-V Circuit Breaker (Sizes 090-150) allows room
for error without replacing transformers or fuses.
Single-Side Utility Connections provide easy access to perform any necessary service.
Color-Coded Wires permit easy tracing and diagnostics.
Belt-Driven Motors 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.
TABLE OF CONTENTS
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . 4
ARI Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,14
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-46
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46-54
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56-58
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . 59-61
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-65
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66-68
2
FEATURES/BENEFITS (cont)
REFRIGERATION SYSTEM
PROTECTION
SINGLE PIECE
TOP PANEL
TOOL-LESS
FILTER ACCESS
SLEEVE BEARING PERMANENTLY
LUBRICATED MOTORS
ON-SITE CONVERTIBILITY
FROM VERTICAL TO
HORIZONTAL DISCHARGE
HIGH-EFFICIENCY
COILS AND
FIXED ORIFICE
REFRIGERANT
METERING SYSTEM
SLOPED,
NON-CORROSIVE
CONDENSATE
DRAIN PAN
PERFECT HUMIDITY™
DEHUMIDIFICATION
PACKAGE (FACTORYINSTALLED OPTION)
HIGH-EFFICIENCY COILS
FULLY MODULATING
ECONOMIZER (OPTION OR ACCESSORY)
3
MODEL NUMBER NOMENCLATURE
551B
E
X
090
000
A
A
551B – Packaged Rooftop
High Efficiency
Cooling Unit
Voltage Designation
J – 208/230-1-60
P – 208/230-3-60
E – 460-3-60
T – 575-3-60
Factory-Installed Options*
X – No Heat Installed
(Field-installed electric heaters available)
Nominal Tons
036 – 3
090
048 – 4
102
060 – 5
120
072 – 6
150
–
–
–
–
7-1/2
8-1/2
10
12-1/2
Electric Heaters
000 – No Factory-Installed Electric Heaters
*Refer to unit price pages for ordering codes and factory-installed options.
ARI* CAPACITIES
UNIT
551B
NOMINAL
TONS
STANDARD
CFM
NET COOLING CAP
(Btuh)
TOTAL
kW
SEER†
EER
036
048
060
3
4
5
1200
1450
1750
36,000
47,000
61,000
3.21
4.25
5.55
13.00
13.00
13.00
11.20
11.05
11.00
UNIT
551B
NOMINAL
TONS
STANDARD
CFM
NET COOLING CAP
(Btuh)
TOTAL
kW
EER
072
090
102
120
150
6
71 / 2
81 / 2
10
121/2
2100
3000
3000
3200
4300
74,000
90,000
102,000
120,000
139,000
6.70
8.18
9.44
10.91
14.04
11.00
11.00
10.80
11.00
9.80
dB
EER
IPLV
SEER
—
—
—
—
LEGEND
Decibels
Energy Efficiency Ratio
Integrated Part-Load Value
Seasonal Energy Efficiency Ratio
SOUND
RATING
(dB)
80
82
82
84
86
SOUND
RATING
(dB)
76
76
80
IPLV
**
11.6
10.9
11.4
9.9
NOTES:
1. Rated in accordance with ARI Standard 210/240 (036-120 units)
or 360 (150 units) and 270 (036-150 units).
2. Ratings are net values, reflecting the effects of circulating fan heat.
Ratings are based on:
Cooling Standard: 80 F db, 67 wb indoor entering-air temperature and 95 F db outdoor entering-air temperature.
IPLV Standard: 80 F db, 67 F wb indoor entering-air temperature
and 80 F db outdoor entering-air temperature.
*Air-Conditioning & Refrigeration Institute.
†Applies only to units with capacity of 65,000 Btuh or less.
**IPLV is not applicable to single-compressor units.
551B036-120
Units Only
4
551B150
Unit Only
PHYSICAL DATA
UNIT 551B
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Durablade Economizer
EconoMi$er
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
Standard
High Static
Motor Frame
Standard
High Static
Fan Rpm Range
Standard
High Static
Motor Bearing Type
Maximum Fan Rpm
Motor Pulley Pitch Diameter A/B (in.)
Standard
High Static
Nominal Motor Shaft Diameter (in.)
Standard
High Static
Fan Pulley Pitch Diameter (in.)
Standard
High Static
Belt — Quantity...Type...Length (in.)
Standard
High Static
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Standard
High Static
Movable Pulley Maximum Full Turns
From Closed Position
Standard
High Static
Factory Setting — Full Turns Open
Standard
High Static
Factory Speed Setting (rpm)
Standard
High Static
Fan Shaft Diameter at Pulley (in.)
036
3
048
4
060
5
072
6
435
34
47
18
115
445
34
47
18
115
465
34
47
18
115
520
34
47
18
115
1
42
1
53
1
50
1
60
10- 0
12-13
9-10
13- 6
Scroll
R-22
5- 8
8-13
Propeller Type
1...22
1...22
3500
4100
1/8...825
1/4...1100
180
320
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
1...22
3500
1/8...825
180
1...17
14.6
2...17
16.5
1...17
3.9
2...17
16.5
1...17
1...17
3.9
3.9
Centrifugal Type, Belt Drive
1...10 x 10
1...10 x 10
1600
2000
1...10 x 10
1200
1...22
4100
1/4...1100
320
2...17
16.5
1...17
3.9
1...10 x 10
2400
1.20
2.40
1.20
2.40
1.80/2.40*
2.90
2.40
2.90
48
56
48
56
56
56
56
56
760-1090
1075-1455
Ball
2100
840-1185
1075-1455
Ball
2100
1020-1460/1120-1585*
1300-1685
Ball
2100
1120-1585
1300-1685
Ball
2100
1.9/2.9
2.8/3.8
1.9/2.9
2.8/3.8
2.4/3.4
3.4/4.4
2.4/3.4
3.4/4.4
1/2
5/8
1/2
5/8
5/8
5/8
5/8
5/8
4.5
4.5
4.0
4.0
4.0
4.5
4.0
4.5
1...A...33
1...A...39
10.0-12.4
1...A...36
1...A...39
10.0-12.4
1...A...40
1...A...40
14.7-15.5
1...A...38
1...A...40
14.7-15.5
65
65
70
65
75
60
95
60
5
6
5
6
6
5
5
5
3
31/2
3
31/2
3
31/2
3
31/2
890
1233
5/8
980
1233
5/8
1240
1396
5/8
1304
1396
5/8
EVAPORATOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
Cutout
Reset (Auto.)
LOSS-OF-CHARGE/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.)
8-6
11-2
2...15
5.5
High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Fixed Orifice Metering Feed Device
2...15
4...15
4...15
5.5
5.5
5.5
450 ± 50
428
320
7±3
22 ± 5
30
45
Cleanable
1...20 x 24 x 1
Throwaway
2...16 x 25 x 2
LEGEND
Bhp — Brake Horsepower
*Single-phase/three-phase.
5
PHYSICAL DATA (cont)
UNIT 551B
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Durablade Economizer
EconoMi$er
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.)
Nominal Cfm — Standard
Maximum Continuous Bhp
Standard
High Static
Motor Frame
Fan Rpm Range
Standard
High Static
Motor Bearing Type
Maximum Fan Rpm
Motor Pulley Pitch Diameter A/B (in.)
Standard
High Static
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Standard
High Static
Belt — Quantity...Type...Length (in.)
Standard
High Static
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Standard
High Static
Movable Pulley Maximum Full Turns
From Closed Position
Standard
High Static
Factory Setting — Full Turns Open
Factory Speed Setting (rpm)
Standard
High Static
Fan Shaft Diameter at Pulley (in.)
EVAPORATOR COIL
090
71/2
102
81/2
120
10
150
121/2
755
44
62
29
143
760
44
62
29
143
915
44
62
33
143
930
44
62
33
143
2
53
2
53
2
50
2
60
Scroll
R-22
7-10
8- 2
7-14
8- 5
9-3
10-3
9-8
9-5
10-10
12- 8
10-11
10-10
12- 8
12-14
12-6
12-2
Propeller Type
2...22
2...22
2...22
2...22
6500
6500
7000
7000
1/4...1100
1/4...1100
1/4...1100
1/4...1100
650
650
650
650
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
2...17
20.5
1...17
6.3
15 x 15
3000
2...17
25.0
1...17
1...17
6.3
8.4
Centrifugal Type, Belt Drive
15 x 15
15 x 15
3400
4000
2...17
25.0
1...17
8.4
15 x 15
5000
2.90
4.20
56
2.90
4.20
56
3.70
5.25
56
5.25
—
56
840-1085
860-1080
Ball
2100
840-1085
860-1080
Ball
2100
860-1080
830-1130
Ball
2100
900-1260
—
Ball
2100
3.4/4.4
4.0/5.0
7/8
3.4/4.4
4.0/5.0
7/8
4.0/5.0
2.8/3.8
7/8
2.8/3.8
—
7/8
7.0
8.0
7.0
8.0
8.0
5.8
5.8
—
1...A...51
1...A...55
16.75-19.25
1...A...51
1...A...55
16.75-19.25
1...A...51
1...BX...46
15.85-17.50
1...BX...46
—
15.85-17.50
50
60
50
60
45
60
60
—
5
5
5
5
5
5
5
6
5
6
—
5
840
840
860
960
860
860
890
—
1
1
1
1
High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Fixed Orifice Metering Feed Device
3...15
3...15
4...15
4...15
8.9
8.9
11.1
11.1
Rows...Fins/in.
Total Face Area (sq ft)
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
Cutout
Reset (Auto.)
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH (Liquid Line) (psig)
Cutout
Reset (Auto.)
FREEZE-PROTECTION THERMOSTAT
Opens (F)
Closes (F)
OUTDOOR-AIR INLET SCREENS
450 ± 50
428
320
7±3
22 ± 5
Quantity...Size (in.)
RETURN-AIR FILTERS
Quantity...Size (in.)
2...17
20.5
4...16 x 20 x 2
LEGEND
Bhp — Brake Horsepower
6
30 ± 5
45 ± 5
Cleanable
1...20 x 25 x 1
1...16 x 25 x 1
Throwaway
4...16 x 20 x 2
4...20 x 20 x 2
4...20 x 20 x 2
OPTIONS AND ACCESSORIES
ITEM
Electric Heater and Single Point Kit
Integrated Economizer (Durablade)
Integrated Economizer (EconoMi$er)
25% Manual Outdoor Air Damper
50% Manual Outdoor-Air Damper
Two-Position Damper (25% Open)
Two-Position Damper (100% Open)
High-Static Evaporator-Fan Motor and Drive
(Sizes 036-120, Three-Phase Units Only)
Perfect Humidity™ Dehumidification Package
Convenience Outlet
Unit-Mounted Disconnect (Non-Fused)**
Hinged Panel Options††
Roof Curb (14 in.)
Roof Curb (24 in.)
Thru-the-Bottom Service Connections
Electronic Programmable Thermostat
Light Commercial Thermostat
Light Commercial Thermidistat
Humidistat
Fan/Filter Status
Thermostat and Subbase
Time Guard® II Control Circuit
(3-phase units only)
Motormaster® I Low Ambient Control
Motormaster IV Low Ambient Control
Accusensor™ II Enthalpy Control
Accusensor III Differential Enthalpy Sensor
Condenser Coil Hail Guard
Coil Guard Grille
EconoMi$er and Power Exhaust
Power Exhaust for EconoMi$er
Outdoor-Air Enthalpy Sensor (EconoMi$er)
Return-Air Enthalpy Sensor (EconoMi$er)
Return-Air Temperature Sensor (EconoMi$er)
Indoor-Air Quality CO2 Sensor (EconoMi$er)
OPTION*
ACCESSORY†
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
*Factory installed.
†Field installed.
**Cannot be used when unit electrical rating exceeds 80 amps.
††EconoMi$er must be factory installed when used with hinged panels.
LOW AMBIENT CONTROLS
TIME GUARD II CONTROL
The 551B036-150 standard units are designed to operate at outdoor temperatures down to 25 F.
With accessory Motormaster control (condenser-fan speed modulation) or Motormaster IV control (condenser-fan cycling), units can operate at outdoor temperatures down to –20 F. The head
pressure controls, which mount in the condenser section, modulate the condenser-fan motor to
maintain correct condensing temperature.
Time Guard II Control automatically prevents compressor from restarting for at
least 5 minutes after a shutdown. Fieldinstalled accessory prevents short cycling
of compressor if thermostat is rapidly
changed. Time Guard II device mounts in
the control compartment of unit.
MOTORMASTER I
MOTORMASTER IV
7
OPTIONS AND ACCESSORIES (cont)
HAIL GUARD
THERMOSTAT
H
C
Thermostat (24 v) provides one- or 2-stage cooling for control of
unit. Matching subbases are available with or without tamperproof
switches and automatic changeover.
Condenser coil hail guard accessory protects coil against damage
from hail and other flying debris (field installed).
HUMIDISTAT
% RELATIVE HUMIDITY
BRYANT COMMERCIAL PROGRAMMABLE
THERMOSTAT
Field-installed, wall-mounted humidistat is used to control operation
of the Perfect Humidity dehumidification package. The humidistat
controls the occupied space humidity at a user-selected setting between 20% and 80% relative humidity.
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.
PERFECT HUMIDITY™
DEHUMIDIFICATION PACKAGE
BRYANT LIGHT COMMERCIAL THERMIDISTAT
The light commercial thermidistat combines temperature control and
humidity display in one device and provides continuous fan operation in occupied mode. The light commercial thermidistat controls
the Perfect Humidity dehumidification package at selected levels
between 50% and 90% humidity.
Electric heaters are available in a
wide range of capacities for field
installation.
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 Perfect Humidity
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 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.
8
OPTIONS AND ACCESSORIES (cont)
ACCUSENSOR III
(Differential Enthalpy)
ACCUSENSOR™ II
(Enthalpy Control)
B
REV. B
C
SO
TR
S
198818A
D
1
P
T
MINIMUM 3
POSITION
OPEN
+
5
4
2
P1
T1
TR
C
24VAC
2
TR1
1
3 mA MIN. AT 11 VDC
B A
ENTHALPY CONTROL
3
D
CW–SETPOINTS–CCW
RUSH AT 24VAC
CONTACTS SHOWN IN HIGH ENTHALPY
OR UNPOWERED STATE
°F
CONTACT RATINGS: 1.5A RUN, 3.5A IN
OUTDOOR TEMP.
% 90
H
DAMPER
U 70
CLOSED
M
I 60
DAMPER
D
OPEN
I 30
T
Y 10
50 55 60 65 70 75 80 85
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 is available as a field-installed
accessory for the Durablade economizer.
The accessory Accusensor III differential enthalpy sensor 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.
97-3672
REV.
COIL GUARD GRILLE
Coil guard grille protects coils against large objects
and vandalism.
UNIT-MOUNTED DISCONNECT
CONVENIENCE OUTLET
Factory-installed, internally mounted and externally accessible 115-v
female receptacle. Includes 15-amp GFI receptacle with independent
fuse protection. Voltage required to operate convenience outlet is provided by a factory-installed step down transformer.
Factory-installed, internally mounted, NEC and UL approved nonfused switch provides unit power shutoff and disconnect lockout protection capability. The switch is accessible from outside the unit. Not
for use on units rated higher than 80 amps.
9
OPTIONS AND ACCESSORIES (cont)
DURABLADE ECONOMIZER
ECONOMI$ER
ECONOMI$ER
PLUG
CONTROLLER
GEAR-DRIVEN
DAMPER
ACTUATOR
OUTDOOR AIR
TEMPERATURE
SENSOR
BAROMETRIC
RELIEF DAMPERS
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 available for vertical ductwork applications
factory installed.
A vertical EconoMi$er, 2-stage power exhaust and dedicated horizontal EconoMi$er are available for field installation.
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. Design includes standard dry-bulb control
and 30% barometric relief capability.
COMPRESSOR HINGED PANEL OPTION
551B036-072 UNITS SHOWN
COMPRESSOR HINGED PANEL OPTION
551B090-150 UNITS SHOWN
This is included as a factory-installed option. It permits quick and simple
compressor access.
10
BASE UNIT DIMENSIONS
UNIT
551B
036
048
060
072
STD UNIT
WEIGHT
Lb
435
445
465
520
Kg
197
202
211
236
DURABLADE
ECONOMIZER
WEIGHT
Lb
Kg
34
15.4
34
15.4
34
15.4
34
15.4
ECONOMI$ER
WEIGHT
Lb
47
47
47
47
Kg
21.3
21.3
21.3
21.3
CORNER
WEIGHT
(A)
Lb
Kg
124 56.2
127 57.6
133 60.3
149 67.6
CORNER
WEIGHT
(B)
Lb
Kg
106 48.1
108 49.0
113 51.3
127 57.6
CORNER
WEIGHT
(C)
Lb
Kg
95 43.1
97 44.0
101 45.8
112 50.8
CORNER
WEIGHT
(D)
Lb
Kg
110 49.9
113 51.3
118 53.5
132 59.9
A
13/8″ Dia. [35] Field Power Supply Hole
B
2″ Dia. [51] Power Supply Knockout
C
13/4″ Dia. [44] Charging Port Hole
D
7/8″
Dia. [22] Field Control Wiring Hole
E
3/4″
— 14 NPT Condensate Drain
F
21/2″ Dia. [64] Power Supply Knockout
NOTES:
1. Dimensions in [ ] are in millimeters.
2.
Center of gravity.
3.
Direction of airflow.
4. Ductwork to be attached to accessory roof curb only.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible surfaces (when not using curb) 0 inches, on horizontal discharge units with
electric heat 1 in. clearance to ductwork for 1 ft.
b. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greater clearance is optional.
c. Overhead, 60 in. to assure proper condenser fan operation.
d. Between units, control box side, 42 in. per NEC (National Electrical Code).
e. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.
f. Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in. per NEC.
g. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil as stated in Note 5b, 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.
8. The vertical center of gravity is 1′-61/2″ [470] up from the bottom of the base rail.
BOTTOM POWER CHART, THESE HOLES REQ’D FOR USE
WITH ACCESSORY PACKAGES — CRBTMPWR001A00 (1/2″, 3/4″)
OR CRBTMPWR002A00 (1/2″, 11/4″)
THREADED
CONDUIT SIZE
1/2″
3/4″
11/4″
WIRE USE
REQ’D HOLE
SIZES (Max.)
24 V
Power*
Power*
7/8″ [22.2]
11/8″ [28.4]
13/4″ [44.4]
*Select either 3/4″ or 11/4″ for power, depending on wire size.
551B036-072
11
BASE UNIT DIMENSIONS (cont)
Lb
Kg
Lb
Kg
CORNER
WEIGHT
(A)
Lb
Kg
Ft-in.
mm
Ft-in.
mm
Ft-in.
mm
090
755
342
44
20
62
28
164
74
140
64
208
94
243
110
2- 07/8
632
3-55/16
1050
2-911/16
856
102
760
345
44
20
62
28
165
75
141
64
209
94
245
111
1- 27/8
378
3-55/16
1050
2-911/16
856
120
915
415
44
20
62
28
199
90
170
77
252
114
294
134
2-107/8
885
4-15/16
1253
3-03/8
924
150
930
422
44
20
62
28
202
92
172
78
256
116
300
136
1- 27/8
378
4-15/16
1253
3-03/8
924
UNIT
551B
STD UNIT
WEIGHT
DURABLADE
ECONOMIZER
WEIGHT
Lb
Kg
A
13/8″ Dia. [35] Field Power Supply Hole
B
21/2″ Dia. [64] Power Supply Knockout
C
13/4″ Dia. [44] Charging Port Hole
D
7/8″
Dia. [22] Field Control Wiring Hole
E
3/4″
— 14 NPT Condensate Drain
F
2″ Dia. [51] Power Supply Knockout
ECONOMI$ER
WEIGHT
CORNER
WEIGHT
(B)
Lb
Kg
CORNER
WEIGHT
(C)
Lb
Kg
CORNER
WEIGHT
(D)
Lb
Kg
“H”
“J”
“K”
NOTES:
1. Dimensions in [ ] are in millimeters.
2.
Center of gravity.
3.
Direction of airflow.
4. Ductwork to be attached to accessory roof curb only.
5. Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible surfaces (when not using curb) 0 inches, on horizontal discharge units with
electric heat 1 in. clearance to ductwork for 1 ft.
b. Condenser coil, for proper airflow, 36 in. one side, 12 in. the other. The side getting the greater
clearance is optional.
c. Overhead, 60 in. to assure proper condenser fan operation.
d. Between units, control box side, 42 in. per NEC (National Electrical Code).
e. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.
f. Between unit and block or concrete walls and other grounded surfaces, control box side, 42 in. per
NEC.
g. Horizontal supply and return end, 0 inches.
6. With the exception of the clearance for the condenser coil as stated in Note 5b, 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.
8. The vertical center of gravity is 1′-71/2″ [495] for 090 and 102, 2′-0″ [610] for 120 and 150 up from the
bottom of the base rail.
BOTTOM POWER CHART, THESE HOLES REQ’D FOR USE
WITH ACCESSORY PACKAGES — CRBTMPWR001A00 (1/2″, 3/4″)
OR CRBTMPWR002A00 (1/2″, 11/4″)
THREADED
CONDUIT SIZE
1/2″
3/4″
11/4″
WIRE USE
24 V
Power*
Power*
REQ’D HOLE SIZES
(Max.)
7/8″ [22.2]
11/8″ [28.4]
13/4″ [44.4]
*Select either 3/4″ or 11/4″ for power, depending on wire size.
23.62”
[599.9]
23.62”
[599.9]
551B090-150
12
ACCESSORY DIMENSIONS
UNIT
SIZE
551B
“A”
ROOF CURB
ACCESSORY
036-072
1′-2″ [356]
2′-0″ [610]
CRRFCURB001A00
CRRFCURB002A00
“B”
1′-911/16″
[551]
“C”
“D” ALT
DRAIN
HOLE
“E”
GAS
3/4″
1′-4″
13/4″ [45]
[406]
1/2″
3/4″
“F”
POWER
CONTROL
3/4″ [19] NPT
11/4″ [31.7]
[19] NPT
[12.7] NPT
3/4″
[19 ] NPT
1/2″
CRBTMPWR001A00
CRBTMPWR002A00
[12.7] NPT
11/4″ [31.7]
[19 ] NPT
CONNECTOR
ACY PKG
CRBTMPWR003A00
CRBTMPWR004A00
NOTES:
1. Roof curb accessory is shipped unassembled.
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.
7.
Direction of airflow.
8. Connector packages CRBTMPWR001A00 and 2A00
are for thru-the-curb type. Packages CRBTMPWR00300
and 4A00 are for the thru-the-bottom type connections.
Roof Curb — 551B036-072
13
ACCESSORY DIMENSIONS (cont)
UNIT SIZE
551B
090-150
ROOF CURB
ACCESSORY
1′-2″ [356] CRRFCURB003A00
2′-0″ [610] CRRFCURB004A00
“A”
UNIT SIZE
551B
090-150
“B”
“C”
“D” ALT
DRAIN
HOLE
2′-87/16″ 1′-1015/16″
13/4″ [44.5]
[827]
[583]
“E”
GAS
3/4″
[19]
NPT
—
“F”
POWER
1″ [25] NPT
1″ [25] NPT or
2″ [50.8] NPT
“G”
CONTROL
3/4″
[19]
NPT
CONNECTOR
ACY PKG
CRBTMPWR001A00
CRBTMPWR002A00
NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels. 1 in. thick polyurethane foam, 13/4 in.
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.
7.
Direction of airflow.
8. Place unit as close to edge of curb as possible.
Roof Curb — 551B090-150
14
SELECTION PROCEDURE (With 551B048 Example)
I DETERMINE COOLING AND HEATING REQUIREMENTS AT DESIGN CONDITIONS.
Given:
Required Cooling Capacity (TC) . . . . . . . . . . 44,000 Btuh
Sensible Heat Capacity (SHC). . . . . . . . . . . . 32,000 Btuh
Required Heating Capacity . . . . . . . . . . . . . . 50,000 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). . . . . . . . . . . 230-3-60
II SELECT UNIT BASED ON REQUIRED COOLING
CAPACITY.
Enter the Cooling Capacities table on page 16 at condenser entering temperature of 95 F, evaporator-air entering at 1600 cfm and 80 F db and 67 F wb. The 551B048
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
the notes following the Cooling Capacities tables.
For this example:
Correction factor = 1.1 x (1 – .21) x (82 – 80)
= 1.738
Multiply the correction factor 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 37.48 MBtuh (37,481 Btuh).
NOTE: Unit ratings are gross capacities and do not
include the effect of evaporator-fan motor heat. To calculate net capacities, see Step V.
III SELECT ELECTRIC HEAT.
Heating load required is 50,000 Btuh.
50,000
3.413 Btuh/kW
IV Determine fan speed and power requirements 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 on page 43,
find:
External static pressure
.75 in. wg
Durablade economizer
.05 in. wg
Electric heat
.09 in. wg
Total static pressure
.89 in. wg
Enter the Fan Performance table for 551B048 vertical discharge unit on page 25. At 1600 cfm, the standard motor
will deliver 1.20 in. wg static pressure and 1.15 Bhp. This
will adequately handle the job requirements.
V DETERMINE NET CAPACITIES.
Capacities are gross and do not include the effect of
indoor (evaporator) fan motor (IFM) heat. To determine
input power to the motor, convert bhp to watts using the
Evaporator-Fan Motor Efficiency table on page 43.
Bhp x 746 Watts/Bhp
IFM Watts =
Motor Efficiency
=
1.15 x 746
.75
=
1144
Determine net cooling capacity as follows:
Net capacity = gross capacity – IFM heat
=
48,900 Btuh
– (1144 Watts
Btuh
)
Watts
3904 Btuh
x 3.413
=
48,900 Btuh
=
44,996 Btuh
–
Net sensible capacity = 37,481 Btuh – 3904 Btuh
= 33,577 Btuh
= 14.6 kW of heat required
Determine net heating capacity as follows:
Enter the electric Heating Capacities table on page 45 for
551B048 at 208/230 (3 phase). The accessory 16.0 kW
heater at 240 v most closely satisfies the heating required.
To calculate kW at 230 v, use the Multiplication Factors
table on page 45.
16.0 x .92 = 14.7 kW
16.0 x .92 x 3413 = 50,240 Btuh gross capacity
Net capacity = gross capacity + IFM heat
= 50,240 + 3904
= 54,144 Btuh
15
PERFORMANCE DATA
COOLING CAPACITIES, STANDARD UNITS
551B036 (3 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
900/0.14
78
45.6
14.5
2.24
44.4
14.1
2.51
42.9
13.6
2.80
41.3
13.0
3.11
72
41.9
20.4
2.19
40.7
19.9
2.46
39.3
19.5
2.75
37.7
18.8
3.06
36.0
18.3
3.41
34.2
17.6
3.78
67
38.7
25.2
2.16
37.5
24.7
2.42
36.1
24.1
2.71
34.6
23.5
3.02
33.0
22.9
3.36
31.3
22.2
3.73
62
35.7
29.7
2.12
34.5
29.2
2.39
33.1
28.4
2.66
31.7
27.8
2.98
29.7
26.7
3.31
27.8
25.8
3.66
Temp (F) Air Entering Evaporator — Cfm/BF
1200/0.17
Temp (F) Air Entering Evaporator — Ewb
78
72
67
62
46.8
43.5
40.8
37.7
14.7
21.8
28.2
33.8
2.26
2.21
2.18
2.15
45.7
42.1
39.3
36.4
14.4
21.5
27.7
33.2
2.53
2.47
2.44
2.41
44.6
40.8
37.8
34.9
14.0
21.1
27.2
32.5
2.83
2.77
2.73
2.69
39.3
36.2
33.4
20.7
26.6
31.8
3.09
3.04
3.01
37.4
34.5
31.5
19.9
26.1
30.9
3.43
3.39
3.34
35.6
32.7
29.4
19.4
25.4
29.4
3.80
3.76
3.71
1500/0.20
78
48.1
14.8
2.28
47.0
14.8
2.54
72
44.8
23.3
2.23
43.5
23.2
2.50
42.0
22.8
2.79
40.1
22.1
3.10
38.1
21.3
3.44
36.3
20.8
3.81
67
41.8
30.7
2.19
40.4
30.3
2.45
38.9
29.9
2.74
37.2
29.3
3.06
35.5
28.7
3.41
33.6
28.0
3.78
62
39.0
37.0
2.16
37.6
36.4
2.42
36.1
35.6
2.71
34.7
34.7
3.03
33.2
33.2
3.37
31.9
31.8
3.75
551B048 (4 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1200/0.17
78
58.6
18.3
2.80
56.4
17.6
3.30
54.2
16.9
3.70
52.0
16.2
4.20
49.9
15.5
4.70
47.5
15.0
5.20
72
54.0
26.1
2.80
52.2
25.4
3.20
50.7
24.9
3.60
48.8
24.3
4.10
46.5
23.4
4.60
43.8
22.5
5.20
67
50.7
32.7
2.80
48.9
32.0
3.20
46.9
31.1
3.60
44.5
30.2
4.10
41.1
28.9
4.60
37.5
27.4
5.10
62
44.2
37.5
2.80
41.9
36.4
3.20
39.5
35.0
3.60
36.7
33.6
4.00
34.3
32.4
4.50
32.4
31.5
5.10
78
59.6
18.7
2.90
57.3
17.9
3.30
55.0
17.2
3.70
52.7
16.5
4.20
50.4
15.8
4.70
Temp (F) Air Entering Evaporator — Cfm/BF
1450/0.19
1600/0.21
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
55.9
52.2
47.7
59.9
56.4
52.8
27.6
35.1
41.8
18.7
28.2
36.2
2.80
2.80
2.80
2.90
2.80
2.80
54.1
50.4
45.9
58.1
54.5
51.0
26.9
34.5
40.8
18.2
27.5
35.7
3.20
3.20
3.20
3.30
3.20
3.20
51.9
48.4
43.5
56.3
52.5
48.9
26.1
33.6
39.6
17.6
26.8
34.7
3.70
3.60
3.60
3.70
3.70
3.60
49.8
46.2
40.7
53.8
50.2
46.7
25.3
32.8
38.2
16.8
26.0
33.9
4.10
4.10
4.10
4.20
4.10
4.10
47.7
43.3
37.0
41.3
48.0
44.4
24.9
31.8
36.3
16.0
25.4
33.4
4.70
4.60
4.60
4.70
4.60
4.60
45.1
39.0
33.8
45.3
40.1
24.1
30.2
33.7
24.7
31.9
5.20
5.20
5.10
5.20
5.20
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
2000/0.24
62
49.1
43.8
2.80
47.2
42.8
3.20
45.2
41.8
3.60
42.1
40.3
4.10
38.5
38.3
4.60
35.4
35.4
5.10
78
61.5
19.2
2.90
59.5
18.5
3.30
57.5
17.8
3.70
54.7
17.1
4.20
51.9
16.3
4.70
72
58.1
30.2
2.80
55.3
28.6
3.20
53.9
28.8
3.70
51.5
27.9
4.10
48.9
27.1
4.70
46.3
26.5
5.20
67
54.5
39.5
2.80
52.3
38.5
3.20
50.1
37.5
3.60
48.2
37.4
4.10
45.7
36.9
4.60
42.6
35.9
5.20
62
50.6
47.5
2.80
48.7
46.6
3.20
46.7
45.6
3.60
44.7
44.4
4.10
42.0
42.0
4.60
38.8
38.8
5.20
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
16
PERFORMANCE DATA (cont)
COOLING CAPACITIES, STANDARD UNITS (cont)
551B060 (5 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1500/0.08
78
80.4
25.6
3.65
78.5
25.1
4.20
72
70.8
34.1
3.53
68.9
33.5
3.98
66.8
32.8
4.48
64.3
32.0
5.03
61.5
31.0
5.61
58.7
30.0
6.27
67
65.4
42.7
3.49
63.2
41.8
3.94
60.6
40.7
4.43
57.7
39.6
4.96
54.8
38.4
5.55
51.6
37.2
6.19
62
58.5
49.9
3.44
55.3
48.4
3.87
52.4
47.0
4.35
49.9
45.8
4.87
47.3
44.5
5.46
44.5
43.1
6.09
78
82.5
26.1
3.68
Temp (F) Air Entering Evaporator — Cfm/BF
1750/0.09
2000/0.11
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
72.5
67.3
61.1
83.7
73.0
68.4
35.7
45.5
54.2
26.3
36.8
48.0
3.55
3.50
3.46
3.70
3.55
3.51
70.5
65.1
57.9
72.2
66.4
35.0
44.8
52.8
37.0
47.6
4.00
3.96
3.90
4.03
3.97
68.3
62.5
54.3
69.3
63.8
34.5
43.8
51.1
36.0
46.7
4.50
4.45
4.37
4.51
4.46
65.9
59.8
51.7
66.9
61.1
33.7
42.8
49.7
35.3
45.7
5.05
4.99
4.90
5.06
5.00
62.8
56.7
49.1
64.0
58.2
32.5
41.6
48.2
34.4
44.6
5.62
5.58
5.49
5.65
5.60
59.9
53.4
46.2
60.8
54.9
31.7
40.4
46.2
33.3
43.4
6.28
6.21
6.13
6.29
6.24
2500/0.13
62
62.8
57.8
3.47
60.2
56.8
3.92
56.6
55.0
4.40
54.1
53.5
4.93
51.6
51.6
5.52
49.0
48.9
6.17
78
72
74.8
39.6
3.57
73.2
39.3
4.04
71.2
39.1
4.55
68.4
38.4
5.08
65.4
37.4
5.67
62.2
36.4
6.31
67
70.3
53.0
3.54
68.1
52.5
3.99
65.6
51.8
4.48
62.8
51.0
5.02
59.9
50.0
5.61
56.8
48.9
6.27
62
64.8
63.4
3.48
62.9
62.4
3.94
60.6
60.5
4.44
58.4
58.4
4.98
56.1
56.1
5.57
53.5
53.4
6.22
551B072 (6 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1800/0.05
78
93.5
29.9
4.73
91.3
29.2
5.29
89.0
28.4
5.85
72
86.7
43.0
4.58
84.1
42.0
5.10
81.3
41.0
5.65
77.9
39.7
6.22
74.7
38.7
6.84
70.3
37.2
7.43
67
80.7
53.7
4.46
78.2
52.6
4.97
75.3
51.4
5.52
72.0
50.2
6.08
68.4
48.8
6.68
63.6
47.0
7.25
62
74.4
63.8
4.33
72.0
62.7
4.85
69.2
61.4
5.39
66.1
60.0
5.94
61.8
58.1
6.49
57.2
55.8
7.03
78
95.3
30.1
4.77
93.0
29.6
5.34
Temp (F) Air Entering Evaporator — Cfm/BF
2100/0.06
2400/0.06
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
88.8
82.7
76.6
97.3
90.5
84.4
45.0
57.4
68.9
30.7
47.2
61.2
4.63
4.50
4.38
4.82
4.67
4.55
86.4
80.3
74.1
88.2
81.7
46.8
60.2
44.5
56.6
68.0
5.16
5.03
4.90
5.21
5.06
83.4
77.3
71.3
85.1
78.9
43.4
55.3
66.6
45.8
59.2
5.71
5.57
5.44
5.77
5.62
80.0
73.8
68.0
81.6
75.3
42.2
54.0
65.2
44.6
57.8
6.29
6.13
6.00
6.34
6.17
75.9
70.0
64.1
77.6
71.3
40.8
52.6
63.2
43.3
56.4
6.87
6.71
6.56
6.93
6.75
71.8
65.5
59.1
72.9
66.8
39.5
51.0
59.1
41.7
55.0
7.48
7.30
7.13
7.51
7.35
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
3000/0.08
62
78.2
73.6
4.41
75.7
72.5
4.93
72.9
71.2
5.48
69.6
69.3
6.04
66.5
66.4
6.63
61.9
61.9
7.22
78
72
92.6
51.2
4.72
90.2
50.6
5.26
87.2
50.2
5.83
83.4
49.0
6.40
78.7
46.9
6.96
74.0
45.4
7.54
67
86.3
67.4
4.58
84.0
67.4
5.12
80.6
65.8
5.66
77.1
64.5
6.22
73.0
63.2
6.80
68.6
61.8
7.41
62
81.0
80.7
4.47
78.8
78.7
4.99
76.2
76.2
5.55
73.2
73.2
6.12
70.1
70.0
6.72
66.4
66.3
7.33
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
17
PERFORMANCE DATA (cont)
COOLING CAPACITIES, STANDARD UNITS (cont)
551B090 (71/2 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
2250/0.095
78
111.9
35.4
5.15
108.8
34.4
5.86
107.4
34.0
6.69
103.4
32.6
7.52
TC
SHC
kW
TC
SHC
kw
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
72
105.5
50.6
5.15
102.5
49.7
5.86
98.9
48.5
6.65
95.3
47.3
7.51
91.0
45.9
8.43
86.2
44.1
9.38
67
96.9
63.6
5.07
93.6
62.4
5.79
90.1
61.2
6.58
86.2
59.6
7.44
82.0
58.0
8.33
77.8
56.4
9.29
62
87.6
75.7
5.04
83.6
73.9
5.73
79.3
71.9
6.49
75.7
70.2
7.31
71.6
68.1
8.20
68.1
66.3
9.14
Temp (F) Air Entering Evaporator — Cfm/BF
3000/0.110
Temp (F) Air Entering Evaporator — Ewb
78
72
67
62
113.3
107.3
99.6
90.7
35.9
53.3
69.2
83.7
5.42
5.16
5.11
5.06
111.9
105.1
96.5
87.5
35.3
52.8
68.4
82.2
6.15
5.89
5.82
5.77
109.3
101.6
92.9
83.5
34.3
51.9
67.2
80.2
6.94
6.69
6.61
6.53
97.6
88.8
79.6
50.7
65.9
78.0
7.55
7.48
7.36
93.2
84.5
75.4
49.3
64.2
75.3
8.46
8.37
8.27
88.3
80.0
71.9
47.5
62.6
71.8
9.43
9.34
9.24
3750/0.135
78
114.7
38.8
5.68
114.1
35.7
6.43
110.8
34.9
7.21
72
110.3
58.0
5.20
107.7
57.3
5.93
103.8
56.2
6.72
100.0
55.3
7.59
95.6
54.2
8.52
90.0
52.1
9.47
67
101.9
76.6
5.13
99.0
75.9
5.86
95.3
74.9
6.64
91.0
73.6
7.50
86.6
72.1
8.42
81.9
70.1
9.38
62
93.8
92.2
5.07
90.6
90.0
5.78
87.4
87.3
6.57
84.1
84.1
7.41
80.7
80.7
8.34
77.2
77.2
9.32
551B102 (81/2 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2550/0.075
78
128.1
37.4
5.92
124.9
36.5
6.78
121.5
35.5
7.75
117.0
33.5
8.78
72
119.5
56.5
5.92
115.5
55.1
6.77
111.3
53.7
7.71
107.2
52.2
8.75
101.9
50.2
8.80
97.3
48.7
11.03
67
105.7
65.7
5.84
101.9
64.3
6.69
97.7
62.8
7.62
93.5
61.3
8.64
89.2
59.5
9.73
84.3
57.7
10.90
62
94.8
77.8
5.77
90.6
76.1
6.61
86.6
74.2
7.52
82.5
72.7
8.54
78.0
70.7
9.64
73.1
68.5
10.70
78
129.8
37.8
6.11
127.1
36.8
6.99
123.5
36.0
7.96
Temp (F) Air Entering Evaporator — Cfm/BF
3000/0.09
3400/0.105
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
123.1 109.1
98.7
130.3 124.8 110.7
60.2
71.7
86.3
37.9
62.2
75.8
5.95
5.88
5.81
6.24
5.96
5.89
119.7 105.4
94.8
128.1 121.4 106.9
58.9
70.5
85.1
36.8
61.3
74.5
6.83
6.74
6.67
7.13
6.85
6.76
115.0 101.2
90.6
124.3 117.2 102.6
57.4
68.9
82.9
36.1
60.0
73.0
7.76
7.68
7.59
8.09
7.80
7.69
110.5
96.7
85.9
112.1
97.9
56.0
67.4
81.2
58.4
71.4
8.80
8.70
8.61
8.82
8.71
104.7
91.8
81.5
106.7
93.1
53.7
65.7
79.5
56.6
69.5
9.86
9.79
9.72
9.90
9.79
100.0
86.8
76.0
101.3
87.9
52.4
63.9
76.0
54.8
67.9
11.08 10.96 10.81
11.11 10.99
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
4250/0.125
62
100.2
92.8
5.83
96.1
90.5
6.67
91.7
88.6
7.58
87.6
86.6
8.62
83.3
83.1
9.71
78.7
78.7
10.88
78
131.3
41.0
6.56
130.1
39.7
7.46
72
126.3
67.8
5.99
124.0
66.2
6.88
120.1
65.0
7.84
114.9
63.5
8.86
109.2
61.5
9.95
102.9
59.1
11.14
67
112.8
83.3
5.91
109.1
82.9
6.79
104.8
81.5
7.74
99.9
79.5
8.75
94.9
77.8
9.84
89.5
75.7
11.03
62
103.4
101.2
5.85
98.7
98.5
6.71
94.5
94.5
7.66
90.5
90.5
8.67
86.3
86.3
9.75
81.9
81.9
10.93
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
18
PERFORMANCE DATA (cont)
COOLING CAPACITIES, STANDARD UNITS (cont)
551B120 (10 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
3000/0.31
78
152.7
46.7
7.34
150.5
44.7
8.28
147.7
43.9
9.33
72
140.3
65.6
7.35
137.7
65.0
8.29
133.8
63.9
9.33
128.7
62.3
10.46
123.2
60.4
11.66
117.5
58.5
12.99
67
129.4
82.2
7.21
125.3
81.2
8.13
120.7
79.6
9.16
115.4
77.6
10.28
109.1
75.1
11.47
101.8
72.5
12.77
62
115.0
97.4
7.12
110.0
95.2
8.02
103.0
92.2
8.98
96.5
89.4
10.00
90.8
86.6
11.20
86.2
84.5
12.50
78
153.1
47.3
7.54
151.5
44.9
8.51
Temp (F) Air Entering Evaporator — Cfm/BF
3200/0.34
4000/0.46
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
141.2 130.4 118.1 154.9 145.2 134.0
66.7
84.4 101.5
49.8
71.3
93.1
7.37
7.23
7.13
7.71
7.46
7.31
138.9 126.6 113.6
142.6 130.6
71.0
92.8
66.3
83.6
99.7
8.32
8.16
8.03
8.40
8.24
135.1 121.9 107.2
138.8 125.8
65.2
82.0
97.0
70.6
91.5
9.35
9.18
9.00
9.44
9.27
129.8 116.6 99.7
133.7 120.3
63.6
80.2 93.5
69.4
89.6
10.47 10.30 10.07
10.57 10.38
124.3 110.3 92.2
127.9 114.4
61.9
77.8 90.0
67.6
87.6
11.68 11.51 11.25
11.77 11.60
118.5 103.0 87.4
121.6 107.1
60.0
75.0 87.3
65.8
85.1
13.02 12.81 12.55
13.10 12.92
5000/0.61
62
122.1
113.5
7.17
117.7
112.0
8.09
112.8
109.7
9.07
107.1
106.8
10.21
100.8
100.7
11.41
96.0
96.0
12.74
78
158.1
51.0
8.10
72
147.5
77.9
7.51
144.6
76.9
8.45
141.7
76.9
9.51
136.7
76.0
10.66
130.9
74.6
11.89
124.1
72.5
13.19
67
136.6
103.7
7.37
133.3
103.1
8.31
128.5
102.5
9.33
122.8
100.6
10.43
116.8
98.7
11.66
110.3
96.9
13.01
62
125.3
124.7
7.22
122.3
122.2
8.16
118.5
118.4
9.19
114.5
114.3
10.31
110.1
109.9
11.58
104.8
104.8
12.91
551B150 (121/2 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
3750/0.08
72
167.1
82.5
9.44
162.3
80.9
10.49
156.5
79.1
11.60
150.0
76.5
12.76
141.8
73.6
13.85
132.5
70.9
15.04
67
154.3
103.5
9.18
149.3
101.4
10.18
143.7
99.5
11.30
136.2
96.7
12.42
122.2
91.2
13.55
108.6
85.7
14.66
62
142.0
123.6
8.95
135.6
120.9
9.97
126.3
116.5
11.01
115.7
111.2
12.09
104.4
104.2
13.22
93.9
93.8
14.44
72
169.8
85.8
9.50
165.1
84.4
10.55
159.6
83.0
11.69
153.0
80.8
12.83
144.3
77.9
13.94
134.8
74.9
15.14
Temp (F) Air Entering Evaporator — Cfm/BF
4300/0.09
5000/0.11
Temp (F) Air Entering Evaporator — Ewb
67
62
72
67
157.7
144.8
173.5
160.6
109.7
132.0
90.3
117.7
9.26
9.01
9.60
9.33
152.5
139.6
168.8
155.3
107.9
129.9
89.6
115.8
10.27
10.02
10.67
10.32
146.8
131.3
162.3
149.8
106.1
126.0
87.6
114.2
11.39
11.10
11.75
11.47
139.3
120.9
155.6
142.5
103.5
120.0
85.7
112.3
12.52
12.20
12.91
12.62
126.1
110.8
147.7
129.4
98.5
110.8
83.4
107.3
13.64
13.35
14.05
13.73
111.4
100.7
137.6
114.4
92.9
100.7
80.2
101.4
14.75
14.55
15.23
14.85
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
6250/0.13
62
148.4
141.9
9.07
143.5
139.8
10.11
136.5
135.8
11.20
128.5
128.4
12.32
118.9
118.4
13.50
106.6
106.5
14.72
72
176.5
98.2
9.68
172.1
97.6
10.75
166.5
95.8
11.87
158.8
93.6
12.96
150.7
91.8
14.14
140.3
89.0
15.29
67
164.5
130.7
9.43
159.2
129.3
10.43
153.2
127.7
11.56
145.9
125.9
12.72
135.2
121.9
13.86
122.9
116.3
14.94
62
153.3
153.1
9.17
149.3
149.1
10.21
144.5
144.4
11.35
138.8
138.7
12.52
130.1
129.9
13.70
120.1
120.1
14.84
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
19
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION
551B036 (3 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kw
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
900/0.14
78
44.9
12.5
2.26
42.1
10.8
2.53
39.2
9.1
2.82
37.1
7.5
3.13
72
41.3
17.5
2.19
38.6
15.2
2.46
35.9
13.0
2.74
33.8
10.9
3.05
31.8
9.0
3.40
28.7
6.9
3.78
67
37.3
22.4
2.14
34.4
20.1
2.40
31.4
17.9
2.68
29.7
15.8
3.00
28.0
13.7
3.36
26.3
12.2
3.73
62
34.3
26.7
2.10
31.6
25.1
2.37
28.8
23.3
2.63
27.4
21.0
2.97
25.5
18.4
3.31
23.4
17.3
3.66
Temp (F) Air Entering Evaporator — CFM/BF
1200/0.17
Temp (F) Air Entering Evaporator — Ewb
78
72
67
62
46.8
43.5
39.2
35.9
13.2
19.6
25.5
31.2
2.28
2.21
2.16
2.14
44.8
41.3
37.5
33.3
11.4
17.1
23.3
29.0
2.55
2.47
2.43
2.40
44.6
39.2
35.9
30.6
14.0
14.5
21.1
26.9
2.83
2.76
2.74
2.67
36.3
32.2
28.7
12.5
18.9
24.6
3.09
3.04
2.99
33.2
28.7
26.5
10.3
16.8
22.3
3.45
3.38
3.32
29.7
25.5
22.9
7.9
14.5
20.6
3.84
3.77
3.71
1500/0.20
78
48.8
13.7
2.31
47.0
12.0
2.58
47.0
14.8
2.54
72
45.5
21.5
2.24
43.5
18.9
2.51
41.3
16.1
2.80
38.1
14.0
3.12
34.9
11.2
3.48
31.3
9.2
3.87
67
41.6
28.5
2.19
38.6
26.3
2.45
35.7
24.2
2.75
32.8
21.7
3.07
30.0
19.3
3.41
27.1
17.3
3.79
62
38.3
35.2
2.16
35.5
32.9
2.42
32.9
30.6
2.71
30.4
28.1
3.03
27.9
25.2
3.37
25.5
22.3
3.75
551B048 (4 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1200/0.17
78
57.5
15.9
2.93
53.1
13.8
3.35
49.0
11.7
3.77
44.4
9.0
4.29
40.0
6.5
4.80
35.1
4.8
5.36
72
52.9
22.7
2.87
49.2
19.8
3.26
45.8
17.2
3.71
41.6
13.5
4.20
37.2
9.9
4.73
32.4
7.2
5.29
67
47.5
28.4
2.86
43.8
25.5
3.25
40.1
22.5
3.68
37.0
19.5
4.17
33.2
16.4
4.68
28.1
12.9
5.23
62
41.5
33.4
2.82
37.1
30.4
3.21
32.8
27.3
3.64
29.7
23.9
4.11
27.1
20.7
4.62
24.9
18.3
5.15
78
59.4
17.6
2.94
55.2
14.8
3.36
51.0
12.2
3.78
45.7
9.6
4.29
40.6
7.2
4.80
Temp (F) Air Entering Evaporator — CFM/BF
1450/0.19
1600/0.21
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
55.7
50.9
47.5
60.5
57.0
51.7
26.1
34.1
38.9
17.2
25.9
33.7
2.89
2.87
2.84
2.94
2.89
2.86
52.1
47.2
43.6
56.4
52.9
47.9
22.2
29.5
35.8
14.9
22.5
30.9
3.28
3.26
3.23
3.37
3.28
3.26
48.2
43.6
39.4
52.3
48.8
44.0
18.4
24.8
32.6
12.5
19.0
28.1
3.72
3.69
3.67
3.80
3.72
3.69
43.2
38.9
35.4
47.1
43.9
39.7
14.7
21.7
29.2
9.8
15.1
23.9
4.20
4.17
4.14
4.31
4.20
4.17
38.4
34.0
30.8
42.1
39.4
35.5
11.3
18.5
25.6
7.0
11.2
19.7
4.74
4.71
4.64
4.82
4.73
4.72
33.8
28.1
27.4
35.3
30.5
8.4
14.5
21.9
16.8
21.1
5.30
5.25
5.19
5.29
5.27
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
2000/0.24
62
48.1
41.6
2.85
43.7
38.8
3.24
39.3
35.9
3.67
34.7
30.7
4.15
30.0
25.4
4.65
26.6
21.2
5.21
78
64.1
18.7
2.96
59.5
15.7
3.39
55.2
12.8
3.82
49.3
10.0
4.32
43.8
7.4
4.82
72
60.5
29.4
2.90
55.4
24.2
3.28
51.7
20.7
3.74
46.5
16.4
4.22
41.3
12.4
4.74
36.1
9.5
5.30
67
55.6
39.1
2.88
51.4
36.0
3.26
47.4
33.0
3.70
41.4
27.8
4.19
35.2
22.4
4.72
32.0
18.3
5.29
62
52.1
47.5
2.85
47.0
44.3
3.24
43.0
41.0
3.68
37.5
35.1
4.16
31.9
28.6
4.69
28.7
24.1
5.25
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
20
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont)
551B060 (5 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1500/0.08
78
79.4
21.8
3.77
75.1
18.9
4.31
75.6
24.1
4.62
72
69.9
29.0
3.61
65.9
25.3
4.05
61.9
21.6
4.53
57.7
18.1
5.05
53.4
14.7
5.60
48.7
10.9
6.26
67
62.7
36.9
3.55
59.1
34.0
3.97
55.2
31.1
4.43
51.1
27.8
4.93
47.2
24.6
5.49
42.0
19.6
6.12
62
56.2
43.9
3.51
51.7
41.9
3.91
47.7
40.0
4.35
44.9
35.7
4.84
42.0
31.5
5.40
36.9
28.0
6.02
78
85.0
23.2
3.81
Temp (F) Air Entering Evaporator — CFM/BF
1750/0.09
2000/0.11
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
74.7
67.3
61.0
90.0
78.5
71.2
31.7
40.5
51.2
24.7
34.5
44.2
3.64
3.58
3.49
3.84
3.65
3.60
70.6
63.2
56.3
75.5
66.8
27.5
37.6
48.0
30.7
41.6
4.07
4.01
3.92
4.11
4.00
66.5
58.8
51.3
70.4
61.9
23.5
34.5
44.6
26.0
38.6
4.55
4.47
4.37
4.56
4.42
61.8
54.5
47.7
65.1
57.2
20.0
31.2
40.1
22.1
34.3
5.09
4.97
4.88
5.11
4.96
56.6
50.0
44.2
59.6
52.5
16.5
27.8
35.7
18.2
30.0
5.64
5.52
5.45
5.69
5.55
51.3
45.0
39.0
54.1
46.8
12.5
22.2
31.5
13.5
24.0
6.28
6.18
6.09
6.33
6.18
2500/0.13
62
64.8
55.4
3.51
60.7
52.0
3.95
55.7
47.9
4.41
50.8
43.5
4.92
46.2
39.0
5.48
40.9
34.0
6.13
78
72
81.7
37.8
3.62
78.1
33.8
4.08
74.2
30.0
4.58
68.4
26.1
5.11
62.6
22.1
5.69
56.9
16.5
6.33
67
75.5
52.0
3.58
70.8
47.4
4.02
65.9
42.8
4.49
60.3
38.9
5.03
54.9
34.9
5.61
49.2
28.0
6.27
62
69.3
62.8
3.51
65.1
58.0
3.96
60.6
52.6
4.44
56.1
48.5
4.98
51.6
44.3
5.57
45.9
38.8
6.22
551B072 (6 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
1800/0.05
78
89.0
25.0
4.80
84.9
21.8
5.40
80.7
18.7
6.01
72
82.6
36.0
4.60
78.2
31.4
5.16
73.8
27.0
5.75
68.4
22.3
6.37
63.4
18.1
7.04
55.5
15.3
7.80
67
75.6
44.8
4.52
71.6
41.2
5.03
67.4
37.6
5.60
62.6
33.5
6.22
57.8
29.5
6.89
49.6
24.0
7.61
62
68.5
55.4
4.36
64.5
41.7
4.89
60.2
47.9
5.44
55.9
43.5
6.06
50.7
38.9
6.68
45.8
35.2
7.38
78
91.1
25.1
4.86
87.0
21.9
5.46
Temp (F) Air Entering Evaporator — CFM/BF
2100/0.06
2400/0.06
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
84.9
78.0
70.9
92.4
85.9
79.5
37.5
49.1
59.7
25.2
38.8
51.1
4.67
4.57
4.46
4.89
4.70
4.57
80.9
73.4
65.8
82.0
74.4
34.7
47.4
33.0
44.7
55.8
5.26
5.09
5.22
5.11
4.96
76.3
68.3
60.5
77.5
69.3
28.2
40.1
51.6
30.2
43.7
5.80
5.66
5.48
5.84
5.68
71.4
64.3
56.2
72.1
64.6
23.4
36.5
48.0
25.4
38.4
6.45
6.27
6.10
6.46
6.29
66.0
60.1
51.5
66.4
59.6
18.8
32.9
44.1
20.7
33.3
7.10
6.91
6.74
7.12
6.95
58.4
52.4
46.1
57.6
52.1
15.7
27.5
39.0
17.5
27.5
7.83
7.67
7.49
7.89
7.72
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
3000/0.08
62
73.5
64.0
4.45
67.9
60.1
4.97
62.3
56.2
5.53
58.3
50.2
6.16
54.5
43.8
6.83
49.5
38.4
7.58
78
72
89.1
41.8
4.77
85.8
37.6
5.32
82.0
33.6
5.90
75.7
29.1
6.53
68.8
24.3
7.16
59.2
20.9
7.92
67
82.7
58.1
4.61
78.2
54.3
5.17
72.8
49.2
5.73
67.0
45.2
6.36
60.8
41.4
7.01
52.8
34.6
7.78
62
77.0
70.2
4.51
72.3
66.7
5.04
67.5
62.9
5.60
62.4
56.2
6.24
57.5
49.7
6.92
53.1
44.4
7.70
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
21
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont)
551B090 (71/2 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kw
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2250/0.095
78
104.4
31.1
5.10
99.9
27.4
5.79
97.6
24.4
6.53
91.7
20.7
7.34
72
98.4
44.5
5.05
94.2
39.7
5.74
89.9
34.8
6.42
84.6
30.0
7.26
79.2
25.2
8.10
72.8
20.1
9.10
67
91.1
55.4
4.96
85.8
51.3
5.65
80.5
47.2
6.33
75.3
42.5
7.16
70.1
37.8
7.99
64.5
33.4
8.94
62
81.1
67.0
4.87
76.9
62.7
5.55
72.6
58.3
6.22
68.0
53.9
7.05
63.3
49.4
7.87
57.2
44.1
8.83
Temp (F) Air Entering Evaporator — CFM/BF
3000/0.110
Temp (F) Air Entering Evaporator — Ewb
78
72
67
62
78
109.5
103.7
97.9
91.8
110.0
34.0
50.4
65.4
80.5
36.5
5.40
5.09
5.04
4.97
5.69
106.8
100.3
92.4
85.2
109.6
30.9
46.2
58.3
75.7
31.5
6.12
5.81
5.75
5.64
6.45
104.2
96.9
86.8
78.6
107.9
27.7
41.9
51.2
71.0
28.9
6.83
6.52
6.45
6.31
7.17
91.6
81.3
73.4
36.9
49.3
66.4
7.36
7.25
7.15
86.2
75.8
68.1
31.9
47.4
61.9
8.20
8.05
7.98
78.0
69.8
62.3
25.4
42.5
56.5
9.23
9.05
8.95
3750/0.135
72
105.8
54.5
5.16
103.5
50.6
5.89
101.1
46.6
6.62
94.5
41.4
7.46
87.9
36.1
8.30
81.6
31.1
9.26
67
101.3
72.4
5.04
96.8
68.2
5.74
92.2
63.9
6.43
86.3
59.2
7.29
80.3
54.4
8.14
73.2
48.9
9.10
62
94.1
89.5
4.99
89.0
84.3
5.70
83.8
79.1
6.40
78.4
73.8
7.23
72.9
68.5
8.05
69.2
64.7
8.99
551B102 (81/2 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
2550/0.075
78
120.5
32.5
6.16
114.2
28.8
6.99
108.0
25.1
7.85
100.2
20.9
8.91
72
112.4
49.1
6.10
105.7
43.6
6.92
98.9
38.0
7.73
91.8
32.6
8.80
84.7
27.2
9.86
77.6
21.8
10.93
67
102.2
62.4
5.96
95.7
57.1
6.78
89.1
51.7
7.59
82.3
46.3
8.64
75.5
40.9
9.69
68.7
35.5
10.74
62
92.6
75.0
5.86
86.5
69.9
6.63
80.4
64.8
7.40
73.8
59.5
8.47
67.3
54.2
9.53
60.7
48.9
10.60
78
121.5
33.2
6.41
116.7
29.9
7.20
112.4
26.8
8.03
Temp (F) Air Entering Evaporator — CFM/BF
3000/0.09
3400/0.105
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
62
115.2 106.4 96.4 124.9 119.6 110.3 101.3
52.9
68.5 82.3
34.2
56.2
73.3
89.5
6.18
6.05
5.95
6.53
6.18
6.05
5.95
110.0 100.6 91.0 120.3 114.0 103.7 94.6
47.8
62.8 76.9
30.4
50.7
67.9 82.8
6.97
6.90
6.75
7.37
7.01
6.85
6.75
104.7 94.8
85.5 115.0 108.4 97.0
87.9
42.7 57.0
71.4
27.2
45.2 62.4
76.2
7.75
7.75
7.56
8.21
7.84
7.65
7.54
97.3
87.6
78.6
100.4 89.8
80.8
37.0
51.9
66.8
39.3 56.7
70.0
8.80
8.76
8.58
8.89
8.69
8.59
89.8
80.5
71.7
82.5
82.5
73.8
31.4
46.9
62.2
33.4
51.0
63.8
9.86
9.77
9.61
9.95
9.74
9.65
82.4
73.3
64.8
84.5
75.3
66.7
25.7
41.8
57.6
27.5
45.3
57.6
10.91 10.78 10.64
11.00 10.78 10.70
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
4250/0.125
78
132.7
38.0
6.83
124.0
44.8
7.68
72
127.6
62.8
6.18
120.3
58.5
7.01
113.0
54.3
7.84
105.1
47.1
8.93
97.2
39.9
10.01
89.3
32.7
11.10
67
117.6
83.3
6.10
110.9
77.7
6.91
104.1
72.0
7.71
95.3
65.5
8.77
86.6
59.1
9.84
77.8
52.6
10.90
62
108.0
101.7
6.00
101.2
98.4
6.80
94.3
87.9
7.60
85.8
80.9
8.67
77.4
73.9
9.75
68.9
66.9
10.82
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
22
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont)
551B120 (10 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
3000/0.025
78
146.2
42.7
7.09
139.5
35.4
8.03
133.5
29.5
8.97
72
134.3
60.0
7.03
127.6
51.5
7.96
120.9
43.0
8.88
112.0
36.1
10.04
103.0
29.2
11.19
94.1
22.3
12.35
67
122.5
76.1
6.84
115.4
68.8
7.86
108.3
61.5
8.87
99.9
54.1
9.96
91.5
46.7
11.06
83.1
39.3
12.15
62
111.4
93.7
6.72
104.6
87.2
7.59
97.8
80.6
8.46
90.4
73.8
9.62
83.1
66.9
10.78
75.7
60.1
11.94
78
147.2
43.5
7.25
140.5
36.5
8.20
Temp (F) Air Entering Evaporator — CFM/BF
3200/0.03
4000/0.035
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
135.8 124.3 113.0 147.6 138.4 129.5
61.3
79.1
97.4
47.5
68.0
89.5
7.01
6.89
6.77
7.42
7.10
6.92
128.9 118.1 107.0
132.5 121.5
61.0
82.7
53.9
72.0
91.2
7.94
7.78
7.51
8.02
7.84
121.9 111.8 101.0
126.5 113.4
46.5
64.8
84.9
53.9
75.9
8.86
8.66
8.26
8.94
8.76
113.1 103.2 93.4
117.2 105.0
38.8
57.8 78.9
45.6
68.2
10.03 9.82
9.48
10.12 9.93
104.3 94.6
85.9
107.8 96.7
31.2 50.7
72.9
37.3 60.6
11.21 10.97 10.70
11.30 11.10
95.5
86.0
78.3
98.5
88.3
23.5
43.7
66.8
29.0
52,8
12.38 12.13 11.92
12.48 12.27
5000/0.04
62
123.5
109.4
6.77
116.6
102.4
7.69
109.7
95.4
8.60
100.7
86.8
9.82
91.7
78.3
11.03
82.7
69.7
12.25
78
153.6
49.2
7.79
72
143.3
75.2
7.15
137.2
68.6
8.02
131.1
62.0
8.89
122.1
53.0
10.10
113.0
44.0
11.30
104.0
35.0
12.53
67
136.5
100.9
7.03
128.0
93.6
7.94
119.4
86.2
8.85
110.5
78.3
10.00
101.6
70.3
11.20
92.7
62.4
12.30
62
130.2
123.3
6.88
122.9
115.9
7.79
115.5
108.4
8.69
105.9
99.7
9.90
96.4
90.9
11.10
86.8
82.2
12.28
551B150 (121/2 TONS)
TEMP (F)
AIR ENT
CONDENSER
(Edb)
75
85
95
105
115
125
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
TC
SHC
kW
3750/0.08
78
172.0
41.4
9.75
164.0
41.9
10.84
155.5
35.1
12.02
72
156.3
66.6
9.28
147.6
58.7
10.29
138.9
50.8
11.29
129.1
42.1
12.59
119.2
33.5
13.90
109.4
24.8
15.20
67
144.2
87.6
8.98
136.2
80.0
9.93
128.2
72.3
10.87
117.8
63.5
12.14
107.3
54.8
13.40
96.9
46.0
14.67
62
132.3
112.1
8.59
123.7
103.8
9.58
115.1
95.5
10.57
105.8
86.5
11.82
96.4
77.5
13.08
87.1
68.5
14.33
78
174.3
43.2
9.78
165.4
43.2
11.13
Temp (F) Air Entering Evaporator — CFM/BF
4300/0.09
5000/0.11
Temp (F) Air Entering Evaporator — Ewb
72
67
62
78
72
67
160.0 148.4 136.2 177.4 162.8 150.6
72.5
94.8 121.3
43.6
76.9
99.6
9.35
9.08
8.80
9.85
9.40
9.18
150.7 140.1 127.2
154.1 140.8
68.7
91.0
63.5
86.5 112.2
10.40 10.34
10.36 10.08 9.77
141.4 131.8 118.3
145.3 131.0
54.4
78.1 103.2
60.5
82.3
11.37 11.08 10.74
11.40 11.50
131.7 121.0 108.7
134.8 119.9
45.4
69.0
93.9
51.2
74.2
12.67 12.34 11.96
12.70 12.67
122.1 110.2 99.0
124.2 108.8
36.4
59.8 84.7
41.9
66.1
13.98 13.59 13.18
14.0 13.83
112.4 99.4
89.3
113.7 97.7
27.4 50.7
75.5
32.6 58.0
15.28 14.85 14.40
15.30 15.00
Do not operate at these conditions.
BF
Edb
Ewb
kW
SHC
TC
—
—
—
—
—
—
6250/0.13
62
138.2
127.5
8.90
127.9
118.1
10.03
117.6
108.7
11.15
107.7
101.3
12.28
97.8
93.8
13.41
87.8
86.4
14.54
78
183.6
65.5
9.87
72
169.0
87.0
9.43
161.1
77.7
10.45
153.1
68.5
11.46
140.9
57.7
12.79
128.7
46.8
14.11
116.5
36.0
15.44
67
157.5
115.5
9.18
148.0
107.8
10.18
138.4
100.0
11.17
126.9
90.2
12.46
115.3
80.5
13.75
103.8
70.7
15.04
62
145.6
142.7
8.93
135.4
133.2
9.88
125.1
123.7
10.83
115.9
113.6
12.08
106.7
103.5
13.33
97.5
93.5
14.58
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
sensible heat capacity (Btuh)
tldb = tedb –
1.1 x cfm
tlwb = wet-bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb –
4.5 x cfm
where hewb = enthalpy of air entering indoor coil
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)
LEGEND
Bypass Factor
Entering Dry Bulb
Entering Wet Bulb
Compressor Motor Power Input
Sensible Heat Capacity (1000 Btuh) Gross
Total Capacity (1000 Btuh) Gross
23
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS
551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.1
Rpm
581
644
687
733
754
810
841
0.2
Bhp
0.12
0.19
0.22
0.26
0.29
0.35
0.42
Rpm
673
709
746
785
826
868
911
Bhp
0.18
0.22
0.26
0.32
0.38
0.45
0.53
External Static Pressure (in. wg)
0.3
0.4
Rpm
Bhp
Rpm
Bhp
805
0.25
736
0.22
782
0.28
835
0.30
806
0.30
867
0.35
843
0.35
903
0.41
891
0.43
942
0.48
937
0.51
984
0.57
985
0.61
1029
0.66
Rpm
865
900
929
960
991
1032
1073
External Static Pressure (in. wg)
0.9
1.0
Rpm
Bhp
Rpm
Bhp
1039
0.45
1061
0.47
1061
0.51
1086
0.55
1090
0.58
1109
0.61
1109
0.64
1156
0.68
1152
0.72
1190
0.76
1181
0.81
1237
0.85
1225
0.90
1271
0.95
Rpm
1083
1111
1127
1203
1228
1293
1317
0.5
0.6
Bhp
0.29
0.35
0.40
0.47
0.53
0.62
0.72
Rpm
911
937
964
994
1047
1067
1109
Bhp
0.53
0.59
0.64
0.71
0.80
0.89
1.00
Rpm
1105
1136
1145
1250
1266
1349
1363
Bhp
0.34
0.38
0.40
0.50
0.60
0.67
0.77
551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.7
Rpm
957
992
1013
1045
1075
1110
1150
0.8
Bhp
0.39
0.44
0.49
0.56
0.64
0.73
0.82
Rpm
988
1039
1068
1090
1122
1160
1190
Bhp
0.43
0.49
0.55
0.64
0.70
0.84
1.00
1.1
1.2
Bhp
0.57
0.63
0.67
0.74
0.84
0.93
1.05
551B036 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.2
Rpm
673
709
746
785
826
868
911
0.4
Bhp
0.18
0.22
0.28
0.32
0.38
0.45
0.53
Rpm
805
836
867
903
942
984
1029
Bhp
0.25
0.30
0.35
0.41
0.48
0.57
0.66
External Static Pressure (in. wg)
0.6
Rpm
Bhp
911
0.34
937
0.38
964
0.40
984
0.50
1047
0.60
1087
0.67
1109
0.77
Rpm
988
1039
1068
1090
1122
1160
1190
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1170
0.68
1203
0.75
1213
0.80
1282
0.88
1341
1.00
1429
1.11
1444
1.25
Rpm
1198
1232
1242
1312
1373
1463
1478
0.8
1.0
Bhp
0.43
0.49
0.55
0.64
0.70
0.84
1.00
Rpm
1061
1086
1109
1156
1190
1237
1271
Bhp
0.73
0.80
0.85
0.94
1.07
1.19
1.34
Rpm
1224
1258
1268
1340
1402
1494
1510
Bhp
0.47
0.55
0.61
0.68
0.76
0.85
0.95
551B036 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
1.2
Rpm
1105
1136
1145
1210
1266
1349
1363
1.4
Bhp
0.57
0.63
0.67
0.74
0.84
0.93
1.05
Rpm
1140
1172
1181
1248
1306
1391
1406
Bhp
0.63
0.69
0.73
0.81
0.92
1.02
1.15
LEGEND
Bhp — Brake Horsepower Input to Fan
3.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 5.)
2. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional
4.
5.
6.
24
1.8
2.0
Bhp
0.77
0.86
0.91
1.01
1.14
1.26
1.43
information on motor performance, refer to Evaporator-Fan Motor Data
tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 760 to 1090 rpm for standard motors; 1075 to 1455 rpm
for high-static motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.1
Rpm
542
576
610
646
681
718
754
791
828
0.2
Bhp
0.16
0.20
0.24
0.28
0.33
0.39
0.45
0.52
0.60
Rpm
616
644
673
704
735
768
801
836
870
0.3
Bhp
0.21
0.25
0.30
0.35
0.40
0.46
0.53
0.60
0.68
Rpm
678
704
732
761
790
836
851
832
864
External Static Pressure (in. wg)
0.4
0.6
Bhp
Rpm
Bhp
Rpm
Bhp
842
0.44
0.27
739
0.32
867
0.50
0.31
764
0.37
889
0.55
0.36
791
0.42
912
0.61
0.42
818
0.48
845
0.54
920
0.68
0.47
873
0.61
965
0.76
0.54
0.61
900
0.69
992
0.84
0.69
828
0.77
1019
0.93
0.77
858
0.86
1046
1.03
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.1
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1008
0.67
1052
0.73
1096
0.78
1134
0.89
1200
1029
0.75
1065
0.81
1101
0.86
1174
1.01
1300
1052
0.83
1087
0.90
1121
0.96
1183
1.09
1400
1208
1.20
1076
0.91
1111
0.99
1145
1.06
1500
1100
1.00
1134
1.08
1168
1.15
1232
1.31
1600
1192
1.25
1255
1.42
1124
1.09
1158
1.17
1700
1182
1.27
1217
1.36
1279
1.54
1147
1.18
1800
1169
1.27
1205
1.37
1240
1.47
1303
1.66
1900
1194
1.38
1228
1.48
1262
1.58
1327
1.78
2000
0.7
Rpm
886
910
933
957
931
1005
1032
1058
1085
1.6
Rpm
1203
1229
1255
1274
1291
1314
1381
1408
1436
0.8
Bhp
0.50
0.56
0.62
0.69
0.76
0.84
0.92
1.02
1.12
Rpm
929
952
976
1001
1023
1045
1071
1097
1124
Bhp
0.56
0.62
0.69
0.76
0.83
0.91
1.00
1.10
1.21
1.8
Bhp
1.00
1.15
1.22
1.33
1.46
1.58
1.71
1.85
1.98
Rpm
—
1277
1305
1337
1350
1370
1393
1417
1440
Bhp
—
1.27
1.38
1.47
1.60
1.77
1.89
2.03
2.18
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.2
Rpm
618
644
673
704
736
768
801
836
870
0.4
Bhp
0.21
0.25
0.30
0.35
0.40
0.46
0.52
0.60
0.68
Rpm
739
764
791
818
845
873
900
928
968
Bhp
0.32
0.37
0.42
0.48
0.54
0.81
0.69
0.77
0.86
External Static Pressure (in. wg)
0.6
Rpm
Bhp
842
0.44
867
0.50
889
0.55
912
0.61
920
0.68
965
0.76
892
0.84
1019
0.93
1046
1.03
Rpm
928
952
976
1001
1023
1045
1071
1097
1124
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1203
1.00
1229
1.15
1255
1.22
1274
1.33
1291
1.46
1314
1.58
1381
1.71
1408
1.85
1436
1.98
Rpm
1232
1277
1305
1337
1350
1370
1383
1417
1440
0.8
1.0
Bhp
0.56
0.62
0.69
0.76
0.83
0.91
1.00
1.10
1.21
Rpm
1008
1029
1052
1076
1100
1124
1147
1169
1194
Bhp
1.07
1.27
1.38
1.47
1.60
1.77
1.89
2.03
2.18
Rpm
1258
1304
1333
1365
1379
1399
1423
1447
1471
Bhp
0.67
0.75
0.83
0.91
1.00
1.09
1.18
1.27
1.38
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
Bhp
FIOP
1.2
Rpm
1096
1101
1121
1145
1168
1192
1217
1240
1262
1.4
Bhp
0.78
0.86
0.96
1.06
1.15
1.25
1.36
1.47
1.58
Rpm
1134
1174
1183
1208
1232
1255
1279
1303
1327
Bhp
0.89
1.01
1.09
1.20
1.31
1.42
1.54
1.66
1.78
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
25
1.8
2.0
Bhp
1.14
1.35
1.47
1.57
1.70
1.89
2.01
2.16
2.32
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 840 to 1185 rpm for standard motors; 1075 to 1455 rpm
for high-static motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B060 (5 TONS) — STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS
External Static Pressure (in. wg)
Airflow
0.1
0.2
0.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1500
711
0.33
769
0.39
878
0.51
1600
751
0.39
806
0.45
906
0.53
1700
791
0.46
846
0.53
941
0.66
1800
852
0.55
905
0.62
1002
0.78
1037
0.88
1900
894
0.64
945
0.72
1072
0.98
2000
936
0.74
984
0.82
1024
0.93
1108
1.10
2100
978
0.85
1021
0.97
1064
1.05
1145
1.22
2200
1064
1.10
1104
1.18
1183
1.36
2300
1107
1.24
1145
1.32
1222
1.52
2400
1150
1.39
1186
1.48
1262
1.68
2500
Rpm
971
1024
1030
1084
1119
1154
1190
1225
1260
1296
1331
551B060 (5 TONS) — STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1134
0.95
1213
1.11
1276
1500
1159
1.02
1231
1.20
1311
1600
1184
1.12
1258
1.30
1322
1700
1235
1.29
1303
1.48
1371
1800
1396
1266
1.40
1330
1.59
1900
1297
1.53
1362
1.73
1422
2000
1393
1.87
1452
1327
1.66
2100
1359
1.81
1423
2.02
1483
2200
1392
1.97
1454
2.18
1515
2300
1426
2.15
1485
2.36
1544
2400
1461
2.34
1518
2.55
1575
2500
Rpm
1331
1395
1403
1433
1460
1485
1510
1538
1569
1601
—
0.6
Rpm
971
1024
1030
1084
1119
1154
1190
1225
1260
1296
1331
551B060 (5 TONS) — STANDARD MOTOR (BELT DRIVE) — THREE-PHASE UNITS (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1134
0.95
1213
1.11
1276
1500
1159
1.02
1231
1.20
1311
1600
1184
1.12
1258
1.30
1322
1700
1235
1.29
1303
1.48
1371
1800
1266
1.40
1330
1.59
1396
1900
1297
1.53
1362
1.73
1422
2000
1327
1.66
1393
1.87
1452
2100
1359
1.81
1423
2.02
1483
2200
1515
1392
1.97
1454
2.18
2300
1544
1426
2.15
1485
2.36
2400
1518
2.55
1575
1461
2.34
2500
Rpm
1331
1395
1403
1433
1460
1485
1510
1538
1569
1601
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.80 for single-phase standard motors; 2.40 for
3-phase standard motors; and 2.90 for high-static motors. Extensive motor
and electrical testing on these units ensures that the full range of the motor
can be utilized with confidence. Using your fan motors up to the ratings
7.
26
Rpm
1052
1087
1112
1163
1194
1226
1259
1294
1330
1365
1400
Bhp
0.78
0.88
0.96
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12
1.6
Bhp
1.38
1.39
1.49
1.69
1.81
1.94
2.08
2.24
2.41
2.59
2.78
551B060 (5 TONS) — STANDARD MOTOR (BELT DRIVE) — THREE-PHASE UNITS
External Static Pressure (in. wg)
Airflow
0.1
0.2
0.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1500
711
0.33
769
0.39
878
0.51
1600
751
0.39
806
0.45
906
0.53
1700
791
0.46
846
0.53
941
0.66
1800
852
0.55
905
0.62
1002
0.78
1900
894
0.64
945
0.72
1037
0.88
2000
936
0.74
984
0.82
1072
0.98
2100
978
0.85
1024
0.93
1108
1.10
1145
1.22
2200
1021
0.97
1064
1.05
1183
1.36
2300
1064
1.10
1104
1.18
1145
1.32
1222
1.52
2400
1107
1.24
1150
1.39
1186
1.48
1262
1.68
2500
Bhp
FIOP
0.8
Bhp
0.64
0.73
0.80
0.93
1.04
1.16
1.29
1.43
1.57
1.73
1.89
Bhp
1.49
1.59
1.69
1.90
2.03
2.16
2.31
2.46
2.64
2.84
—
0.6
0.8
Bhp
0.64
0.73
0.80
0.93
1.04
1.16
1.29
1.43
1.57
1.73
1.89
Rpm
1052
1087
1112
1163
1194
1226
1259
1294
1330
1365
1400
Bhp
0.78
0.88
0.96
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12
1.6
Bhp
1.38
1.39
1.49
1.69
1.81
1.94
2.08
2.24
2.41
2.59
2.78
Bhp
1.49
1.59
1.69
1.90
2.03
2.16
2.31
2.46
2.64
2.84
—
shown will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 1020 to 1460 rpm for single-phase standard motors;
1120 to 1585 for 3-phase standard motors; and 1300 to 1685 for high-static
motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B060 (5 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
0.2
Rpm
789
826
865
905
946
984
1024
1064
1104
1145
1186
0.4
Bhp
0.40
0.46
0.54
0.62
0.72
0.82
0.93
1.05
1.18
1.32
1.48
Rpm
896
931
966
1002
1037
1072
1108
1145
1183
1222
1262
Bhp
0.53
0.61
0.69
0.78
0.88
0.98
1.10
1.22
1.36
1.45
1.68
External Static Pressure (in. wg)
0.6
Rpm
Bhp
990
0.67
1020
0.75
1051
0.84
1084
0.93
1119
1.04
1154
1.16
1192
1.29
1225
1.43
1260
1.57
1296
1.73
1331
1.80
Rpm
1072
1101
1133
1163
1194
1226
1259
1294
1330
1365
1400
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1280
1.32
1340
1.58
1397
1.76
1433
1.90
1460
2.03
1485
2.16
1510
2.31
1538
2.46
1569
2.64
1601
2.84
1631
3.03
Rpm
1320
1380
1424
1480
1517
1544
1569
1595
1622
1652
1684
0.8
1.0
Bhp
0.83
0.91
1.01
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12
Rpm
1153
1178
1206
1235
1266
1297
1327
1359
1392
1426
1461
Bhp
1.22
1.61
1.89
2.09
2.25
2.40
2.55
2.71
2.88
3.07
3.28
Rpm
1360
1421
1467
1524
1562
1590
1616
1643
1671
1701
1734
Bhp
1.00
1.09
1.18
1.29
1.40
1.53
1.66
1.80
1.97
2.15
2.34
551B060 (5 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Bhp
FIOP
1.2
Rpm
1221
1252
1278
1303
1330
1362
1393
1423
1454
1485
1518
1.4
Bhp
1.17
1.27
1.37
1.48
1.59
1.73
1.80
2.02
2.18
2.36
2.55
Rpm
1256
1311
1345
1371
1396
1422
1452
1483
1515
1544
1575
Bhp
1.30
1.45
1.57
1.69
1.80
1.94
2.08
2.24
2.41
2.59
2.78
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.80 for single-phase standard motors; 2.40 for
3-phase standard motors; and 2.90 for high-static motors. Extensive motor
and electrical testing on these units ensures that the full range of the motor
can be utilized with confidence. Using your fan motors up to the ratings
7.
27
1.8
2.0
Bhp
1.33
1.76
2.06
2.28
2.46
2.62
2.79
2.96
3.15
3.35
3.60
shown will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 1020 to 1460 rpm for single-phase standard motors;
1120 to 1585 for 3-phase standard motors; and 1300 to 1685 for high-static
motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B072 (6 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.1
Rpm
852
894
936
978
1021
1064
1107
1150
1193
1237
1280
1324
1368
0.2
Bhp
0.55
0.64
0.74
0.85
0.97
1.10
1.24
1.39
1.56
1.74
1.94
2.15
2.37
Rpm
905
945
984
1024
1064
1104
1145
1186
1228
1269
1311
1354
1396
Bhp
0.62
0.72
0.82
0.93
1.05
1.18
1.32
1.48
1.65
1.83
2.03
2.24
2.46
External Static Pressure (in. wg)
0.4
Rpm
Bhp
1002
0.78
1037
0.88
1072
0.98
1108
1.10
1145
1.22
1183
1.36
1222
1.52
1262
1.68
1301
1.86
1341
2.05
1381
2.25
1420
2.47
1460
2.69
551B072 (6 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1235
1.29
1303
1.48
1371
1800
1266
1.40
1330
1.59
1396
1900
1297
1.53
1362
1.73
1422
2000
1327
1.66
1393
1.87
1452
2100
1359
1.81
1423
2.02
1483
2200
1392
1.97
1454
2.18
1515
2300
1426
2.15
1485
2.36
1544
2400
1461
2.34
1518
2.55
1575
2500
1497
2.54
1552
2.76
—
2600
1532
2.75
—
—
—
2700
—
—
—
—
—
2800
—
—
—
—
—
2900
—
—
—
—
—
3000
0.6
Rpm
1084
1119
1154
1190
1225
1260
1296
1331
1367
1404
1442
1481
1521
0.8
Bhp
0.93
1.04
1.16
1.29
1.43
1.57
1.73
1.89
2.07
2.26
2.47
2.69
2.93
Rpm
1163
1194
1226
1259
1294
1330
1365
1400
1435
1471
1506
1542
—
Bhp
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12
2.31
2.51
2.72
2.94
—
1.6
Bhp
1.69
1.81
1.94
2.08
2.24
2.41
2.59
2.78
—
—
—
—
—
Rpm
1433
1460
1485
1510
1538
1569
1601
—
—
—
—
—
—
Bhp
1.90
2.03
2.16
2.31
2.46
2.64
2.84
—
—
—
—
—
—
551B072 (6 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.2
Rpm
906
945
984
1024
1064
1104
1145
1186
1228
1269
1311
1354
1396
0.4
Bhp
0.62
0.72
0.82
0.93
1.05
1.18
1.32
1.48
1.66
1.83
2.03
2.24
2.46
Rpm
1002
1037
1072
1108
1145
1183
1222
1262
1301
1341
1381
1420
1460
Bhp
0.78
0.88
0.98
1.10
1.22
1.36
1.52
1.68
1.86
2.05
2.25
2.47
2.69
External Static Pressure (in. wg)
0.6
Rpm
Bhp
1084
0.93
1119
1.04
1154
1.16
1190
1.29
1225
1.43
1260
1.57
1296
1.73
1331
1.89
1367
2.07
1404
2.26
1442
2.47
1481
2.69
1521
2.93
0.8
Rpm
1163
1194
1226
1259
1294
1330
1365
1400
1435
1471
1506
1542
1649
1.0
Bhp
1.10
1.21
1.33
1.47
1.62
1.78
1.94
2.12
2.31
2.51
2.72
2.94
3.73
Rpm
1235
1266
1297
1327
1359
1392
1426
1461
1497
1532
1603
1641
1755
Bhp
1.29
1.40
1.63
1.66
1.81
1.97
2.15
2.34
2.54
2.75
3.28
3.55
4.50
551B072 (6 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
1.6
1.8
2.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1303
1.48
1371
1.69
1433
1.90
1481
2.10
1525
2.29
1800
1330
1.59
1396
1.81
1460
2.03
1509
2.24
1554
2.45
1900
1362
1.73
1422
1.94
1485
2.16
1535
2.38
1581
2.61
2000
1393
1.87
1452
2.08
1510
2.31
1561
2.65
1607
2.79
2100
1637
2.97
1423
2.02
1483
2.24
1538
2.46
1590
2.72
2200
1622
2.91
1670
3.18
1454
2.18
1515
2.41
1569
2.64
2300
1655
3.14
1704
3.43
1485
2.36
1544
2.59
1601
2.84
2400
1635
3.11
1690
3.43
1740
3.75
1518
2.55
1575
2.78
2500
1620
3.14
1662
3.51
1739
3.88
1791
4.24
1552
2.76
2600
1612
3.21
1683
3.65
1747
4.08
—
—
—
—
2700
1687
3.82
1761
4.36
—
—
—
—
—
—
2800
1727
4.13
—
—
—
—
—
—
—
—
2900
—
—
—
—
—
—
—
—
—
—
3000
premature motor failure. Unit warranty will not be affected. For additional
LEGEND
information on motor performance, refer to Evaporator-Fan Motor Data
Bhp
— Brake Horsepower Input to Fan
tables on pages 42 and 43.
FIOP — Factory-Installed Option
4. Values include losses for filters, unit casing, and wet coils. See page 43 for
NOTES:
accessory/FIOP static pressure information.
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
5. Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
2.
indicates field-supplied motor and drive are required.
6. Motor drive range: 1120 to 1585 rpm for standard motors; 1300 to 1685 rpm
3. Maximum continuous bhp is 2.40 for standard motors; 2.90 for high-static
for high-static motors. All other rpms require field-supplied drive.
motors. Extensive motor and electrical testing on these units ensures that
7. Interpolation is permissible. Do not extrapolate.
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or
Airflow
(Cfm)
1.2
1.4
28
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
0.2
Rpm
511
518
534
549
557
565
581
597
613
629
646
662
679
696
712
729
746
755
0.4
Bhp
0.52
0.55
0.61
0.67
0.71
0.74
0.81
0.89
0.97
1.06
1.15
1.25
1.35
1.46
1.57
1.69
1.85
1.89
Rpm
592
599
613
627
633
639
652
665
679
694
709
724
740
756
771
787
803
811
Bhp
0.74
0.77
0.84
0.90
0.94
0.97
1.04
1.12
1.20
1.29
1.39
1.50
1.61
1.73
1.85
1.98
2.12
2.20
External Static Pressure (in. wg)
0.6
0.8
Rpm
Bhp
Rpm
Bhp
659
0.95
722
1.19
665
0.98
727
1.22
677
1.06
738
1.30
690
1.14
750
1.38
697
1.18
756
1.42
703
1.22
761
1.46
717
1.31
773
1.55
733
1.40
786
1.66
745
1.50
799
1.76
759
1.59
812
1.88
772
1.70
825
1.99
840
2.11
785
1.80
854
2.24
798
1.91
868
2.37
811
2.02
881
2.50
824
2.14
894
2.64
839
2.21
854
2.42
907
2.78
862
2.49
914
2.85
1.0
Rpm
778
783
794
805
811
816
827
839
850
862
875
887
900
914
928
942
956
963
1.2
Bhp
1.43
1.47
1.55
1.64
1.69
1.74
1.83
1.93
2.04
2.15
2.28
2.41
2.54
2.69
2.84
2.99
3.15
3.23
Rpm
829
834
844
855
861
866
878
889
900
911
923
934
946
959
971
984
997
—
Bhp
1.68
1.72
1.81
1.91
1.96
2.01
2.12
2.23
2.34
2.46
2.58
2.71
2.85
3.00
3.16
3.22
3.49
—
551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
Bhp
FIOP
1.4
Rpm
884
885
892
902
908
913
924
935
946
957
968
980
991
1003
1014
—
—
—
Bhp
1.97
2.00
2.08
2.18
2.24
2.29
2.40
2.52
2.65
2.78
2.91
3.04
3.18
3.32
3.48
—
—
—
External Static Pressure (in. wg)
1.6
1.8
Rpm
Bhp
Rpm
Bhp
937
2.33
947
2.66
939
2.36
979
2.69
944
2.40
987
2.76
949
2.48
1002
2.84
953
2.53
1003
2.87
1004
2.91
957
2.58
967
2.70
1010
3.01
978
2.62
1019
3.13
989
2.96
1030
3.27
1000
3.09
1040
3.41
1011
3.24
—
—
1022
3.38
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
2.0
Rpm
1022
1025
1039
1041
1045
1050
1056
1061
—
—
—
—
—
—
—
—
—
—
5.
indicates a high-static motor and drive is required.
6.
3. Maximum continuous bhp is 2.90 for standard motors; 4.20 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
29
Bhp
3.10
3.12
3.20
3.25
3.28
3.31
3.37
3.47
—
—
—
—
—
—
—
—
—
—
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 840 to 1085 rpm. High-static motor drive range
is 860 to 1080 rpm. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250
0.2
Rpm
557
565
581
597
613
629
646
662
679
696
712
729
746
755
763
780
796
813
830
839
0.4
Bhp
0.71
0.74
0.81
0.89
0.97
1.06
1.15
1.25
1.35
1.46
1.57
1.69
1.82
1.89
1.95
2.09
2.23
2.39
2.55
2.63
Rpm
633
639
652
665
679
694
709
724
740
756
771
787
803
811
819
835
851
867
883
892
Bhp
0.94
0.97
1.04
1.12
1.20
1.29
1.39
1.50
1.61
1.73
1.85
1.98
2.12
2.20
2.27
2.42
2.56
2.74
2.91
3.00
External Static Pressure (in. wg)
0.6
0.8
Rpm
Bhp
Rpm
Bhp
697
1.18
756
1.42
703
1.22
761
1.46
717
1.31
773
1.55
733
1.40
786
1.66
745
1.50
799
1.76
759
1.59
812
1.88
772
1.70
825
1.99
840
2.11
785
1.80
854
2.24
798
1.91
868
2.37
811
2.02
881
2.50
824
2.14
894
2.64
839
2.27
854
2.42
907
2.78
862
2.49
914
2.85
920
2.92
869
2.56
933
3.07
884
2.72
946
3.23
900
2.89
915
3.06
960
3.40
931
3.24
—
—
939
3.34
—
—
551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.4
1.6
1.8
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
908
2.24
953
2.53
1003
2.87
2550
1004
2.91
913
2.29
957
2.58
2600
1010
3.01
924
2.40
967
2.70
2700
935
2.52
978
2.62
1019
3.13
2800
989
2.96
1030
3.27
946
2.65
2900
1000
3.09
1040
3.41
957
2.78
3000
968
2.91
1011
3.24
—
—
3100
980
3.04
1022
3.38
—
—
3200
991
3.18
—
—
—
—
3300
1003
3.52
—
—
—
—
3400
1014
3.48
—
—
—
—
3500
—
—
—
—
—
—
3600
—
—
—
—
—
—
3700
—
—
—
—
—
—
3750
—
—
—
—
—
—
3800
—
—
—
—
—
—
3900
—
—
—
—
—
—
4000
—
—
—
—
—
—
4100
—
—
—
—
—
—
4200
—
—
—
—
—
—
4250
Bhp
FIOP
2.
4.
5.
indicates a high-static motor and drive is required.
6.
3. Maximum continuous bhp is 2.90 for standard motors; 4.20 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
30
1.2
Bhp
1.69
1.74
1.83
1.93
2.04
2.15
2.28
2.41
2.54
2.69
2.84
2.99
3.15
3.23
3.31
3.48
—
—
—
—
Rpm
861
866
878
889
900
911
923
934
946
959
971
984
997
—
—
—
—
—
—
—
Bhp
1.96
2.01
2.12
2.23
2.34
2.46
2.58
2.71
2.85
3.00
3.16
3.32
3.49
—
—
—
—
—
—
—
2.0
Rpm
1045
1050
1056
1061
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
1.0
Rpm
811
816
827
839
850
862
875
887
900
914
928
942
956
963
970
983
—
—
—
—
Bhp
3.28
3.31
3.37
3.41
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 840 to 1085 rpm. High-static motor drive range
is 860 to 1080 rpm. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
External Static Pressure (in. wg)
Airflow
0.2
0.4
0.6
0.8
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
3000
459
0.46
625
0.85
691
1.01
734
1.10
3100
478
0.57
637
0.90
702
1.08
744
1.16
3200
500
0.62
647
0.97
712
1.16
753
1.23
3300
519
0.69
658
1.03
721
1.23
762
1.30
3400
537
0.77
669
1.10
731
1.30
773
1.38
3500
561
0.86
680
1.17
741
1.37
784
1.47
3600
592
0.98
692
1.24
751
1.45
796
1.57
3700
654
1.12
714
1.31
767
1.50
815
1.67
3800
668
1.20
727
1.40
780
1.60
827
1.77
3900
683
1.28
741
1.49
793
1.70
839
1.88
4000
697
1.37
754
1.59
806
1.80
851
1.99
864
2.10
4100
711
1.46
767
1.69
819
1.90
877
2.22
4200
726
1.56
780
1.80
832
2.01
889
2.35
4300
741
1.66
794
1.91
845
2.12
858
2.24
902
2.48
4400
755
1.77
808
2.03
871
2.37
915
2.61
4500
770
1.89
821
2.15
884
2.49
928
2.75
4600
784
2.00
835
2.27
897
2.63
941
2.88
4700
799
2.13
849
2.40
863
2.53
910
2.77
954
3.02
4800
814
2.25
877
2.67
923
2.92
967
3.17
4900
829
2.39
892
2.81
937
3.08
980
3.32
5000
843
2.52
551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.4
1.6
1.8
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
886
1.73
943
1.88
988
1.91
3000
892
1.78
947
2.00
995
2.05
3100
899
1.85
951
2.06
1000
2.17
3200
907
1.93
959
2.10
1004
2.33
3300
915
2.01
966
2.17
1009
2.46
3400
924
2.09
974
2.24
1015
2.51
3500
933
2.18
983
2.32
1023
2.58
3600
950
2.27
991
2.47
1030
2.65
3700
959
2.38
1001
2.58
1040
2.78
3800
969
2.50
1010
2.70
1049
2.91
3900
979
2.62
1020
2.83
1059
3.04
4000
989
2.74
1029
2.96
1068
3.18
4100
1000
2.86
1039
3.10
1077
3.31
4200
1011
2.97
1049
3.23
1087
3.46
4300
1022
3.10
1059
3.37
1097
3.61
4400
1107
3.76
1033
3.23
1070
3.51
4500
1044
3.37
1081
3.64
1117
3.92
4600
1092
3.78
1127
4.07
1056
3.52
4700
1103
3.93
1057
3.69
1138
4.23
4800
1079
3.87
1114
4.09
4900
1149
4.37
1091
4.05
1126
4.25
1160
4.53
5000
Bhp
FIOP
2.
4.
5.
indicates a high-static motor and drive is required.
6.
3. Maximum continuous bhp is 3.70 for standard motors; 5.25 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
31
1.2
Bhp
1.30
1.36
1.43
1.50
1.57
1.65
1.72
1.85
1.95
2.05
2.16
2.28
2.41
2.54
2.68
2.82
2.96
3.11
3.27
3.43
3.60
Rpm
829
837
845
853
862
871
880
906
916
927
938
949
960
971
983
995
1006
1018
1030
1043
1055
Bhp
1.50
1.56
1.63
1.71
1.78
1.86
1.95
2.08
2.18
2.28
2.38
2.49
2.60
2.72
2.86
3.01
3.17
3.32
3.48
3.65
3.82
2.0
Rpm
995
1008
1021
1036
1043
1054
1058
1064
1075
1085
1095
1105
1114
1124
1133
1143
1152
1162
1172
1182
1193
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
1.0
Rpm
787
796
805
814
823
832
841
861
873
884
895
907
919
931
943
955
968
981
993
1006
1019
Bhp
1.95
2.07
2.20
2.36
2.47
2.59
2.70
2.82
2.96
3.11
3.25
3.39
3.54
3.69
3.84
4.00
4.17
4.33
4.50
4.68
4.85
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 860 to 1080 rpm. High-static motor drive range:
830 to 1130. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
551B150 (121/2 TONS) — STANDARD MOTORS (BELT DRIVE)
Airflow
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200
6300
0.2
Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
873
888
903
918
933
948
963
978
993
1008
1023
1038
0.4
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.82
2.97
3.13
3.30
3.47
3.65
3.83
4.00
4.22
4.42
4.63
4.85
Rpm
—
—
—
—
—
—
—
—
—
—
—
863
877
892
906
920
934
949
963
978
992
1006
1021
1035
1050
1065
1079
Bhp
—
—
—
—
—
—
—
—
—
—
—
2.53
2.67
2.81
2.95
3.10
3.26
3.43
3.59
3.77
3.95
4.14
4.34
4.54
4.75
4.96
5.19
External Static Pressure (in. wg)
0.6
0.8
Rpm
Bhp
Rpm
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
864
2.10
—
—
877
2.22
—
—
889
2.35
—
—
902
2.48
915
2.61
871
2.37
928
2.75
884
2.49
941
2.88
897
2.63
910
2.77
954
3.02
923
2.92
967
3.17
937
3.08
980
3.32
950
3.24
993
3.48
963
3.40
1006
3.65
977
3.57
1019
3.82
991
3.75
1032
4.00
1004
3.92
1045
4.18
1018
4.11
1058
4.38
1032
4.30
1072
4.58
1046
4.50
1085
4.79
1060
4.69
1098
5.01
1074
4.91
1112
5.23
1089
5.10
—
—
—
—
—
—
—
—
—
—
1.0
Rpm
861
873
884
895
907
919
931
943
955
968
981
993
1006
1019
1032
1045
1058
1071
1084
1097
1110
1123
—
—
—
—
—
1.2
Bhp
1.85
1.95
2.05
2.16
2.28
2.41
2.54
2.68
2.82
2.96
3.11
3.27
3.43
3.60
3.76
3.93
4.11
4.29
4.47
4.66
4.86
5.07
—
—
—
—
—
Rpm
906
916
927
938
949
960
971
983
995
1006
1018
1030
1043
1055
1068
1081
1094
1106
1119
1132
1145
—
—
—
—
—
—
Bhp
2.08
2.18
2.28
2.38
2.49
2.60
2.72
2.86
3.01
3.17
3.32
3.48
3.65
3.82
4.00
4.19
4.38
4.57
4.77
4.97
5.18
—
—
—
—
—
—
551B150 (121/2 TONS) — STANDARD MOTORS (BELT DRIVE) (cont)
Airflow
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200
6300
Bhp
FIOP
1.4
Rpm
950
959
969
979
989
1000
1011
1022
1033
1044
1056
1057
1079
1091
1103
1115
1127
1139
1152
1165
—
—
—
—
—
—
—
Bhp
2.27
2.38
2.50
2.62
2.74
2.86
2.97
3.10
3.23
3.37
3.52
3.69
3.87
4.05
4.23
4.42
4.62
4.82
5.03
5.24
—
—
—
—
—
—
—
External Static Pressure (in. wg)
1.6
1.8
Rpm
Bhp
Rpm
Bhp
991
2.47
1030
2.65
1001
2.58
1040
2.78
1010
2.70
1049
2.91
1020
2.83
1059
3.04
1029
2.96
1068
3.18
1039
3.10
1077
3.31
1049
3.23
1087
3.46
1059
3.37
1097
3.61
1070
3.51
1107
3.76
1081
3.64
1117
3.92
1092
3.78
1127
4.07
1103
3.93
1138
4.23
1114
4.09
1149
4.37
1126
4.25
1160
4.53
1137
4.45
1171
4.70
1149
4.65
1182
4.91
1161
4.85
1194
5.07
1173
5.06
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
2.0
Rpm
1064
1075
1085
1095
1105
1114
1124
1133
1143
1152
1162
1172
1182
1193
1204
1215
—
—
—
—
—
—
—
—
—
—
—
3.
NOTES:
1. Boldface indicates field-supplied drive is required. (See Note 5.)
2. Maximum continuous bhp is 5.25. Extensive motor and electrical testing on
these units ensures that the full range of the motor can be utilized with confidence. Using your fan motors up to the ratings shown will not result in
4.
5.
6.
32
Bhp
2.82
2.96
3.11
3.25
3.39
3.54
3.69
3.84
4.00
4.17
4.33
4.50
4.68
4.85
5.01
5.18
—
—
—
—
—
—
—
—
—
—
—
nuisance tripping or premature motor failure. Unit warranty will not be
affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify
Standard motor drive range: 900 to 1260 rpm.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS
551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.1
Rpm
526
570
614
658
703
725
755
0.2
Bhp
0.06
0.09
0.13
0.16
0.20
0.29
0.33
Rpm
584
627
670
710
752
776
816
Bhp
0.08
0.13
0.16
0.23
0.27
0.31
0.38
External Static Pressure (in. wg)
0.3
0.4
Rpm
Bhp
Rpm
Bhp
656
0.12
734
0.22
800
0.26
738
0.19
812
0.29
758
0.23
780
0.28
840
0.32
808
0.32
868
0.37
845
0.38
891
0.42
870
0.43
924
0.48
Rpm
818
848
863
889
916
937
969
External Static Pressure (in. wg)
0.9
1.0
Rpm
Bhp
Rpm
Bhp
989
0.38
1028
0.42
1020
0.44
1064
0.48
1052
0.49
1100
0.52
1076
0.53
1136
0.59
1090
0.61
1172
0.65
1108
0.67
1208
0.70
1117
0.70
1245
0.74
Rpm
1074
1124
1163
1201
1239
1278
1315
0.5
0.6
Bhp
0.25
0.29
0.32
0.36
0.41
0.47
0.53
Rpm
875
895
914
938
963
983
1014
Bhp
0.49
0.54
0.59
0.65
0.72
0.79
0.87
Rpm
1120
1185
1225
1266
1306
1347
1385
Bhp
0.27
0.31
0.35
0.40
0.45
0.51
0.58
551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.7
Rpm
924
936
960
960
1012
1027
1056
0.8
Bhp
0.32
0.35
0.39
0.45
0.51
0.56
0.63
Rpm
953
977
1005
1038
1061
1071
1097
Bhp
0.35
0.39
0.43
0.50
0.56
0.60
0.68
1.1
1.2
Bhp
0.54
0.60
0.65
0.72
0.79
0.87
0.96
551B036 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
0.2
Rpm
584
627
670
710
752
776
816
0.4
Bhp
0.08
0.13
0.16
0.23
0.27
0.31
0.38
Rpm
734
800
812
840
868
891
924
Bhp
0.22
0.26
0.29
0.32
0.37
0.42
0.48
External Static Pressure (in. wg)
0.6
Rpm
Bhp
875
0.27
895
0.31
914
0.35
936
0.40
963
0.45
983
0.51
1014
0.58
Rpm
953
977
1005
1038
1061
1071
1097
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1186
0.64
1255
0.71
1298
0.77
1341
0.86
1383
0.94
1427
1.03
1467
1.14
Rpm
1215
1285
1328
1373
1416
1461
1502
0.8
1.0
Bhp
0.35
0.39
0.43
0.50
0.56
0.60
0.68
Rpm
1028
1064
1100
1136
1172
1208
1245
Bhp
0.69
0.77
0.83
0.92
1.01
1.11
1.22
Rpm
1240
1312
1357
1402
1446
1492
1534
Bhp
0.42
0.48
0.52
0.59
0.65
0.70
0.74
551B036 (3 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
900
1000
1100
1200
1300
1400
1500
Bhp
FIOP
1.2
Rpm
1120
1185
1225
1266
1306
1347
1385
1.4
Bhp
0.54
0.60
0.65
0.72
0.79
0.87
0.96
Rpm
1155
1222
1263
1306
1347
1389
1428
Bhp
0.59
0.66
0.71
0.79
0.87
0.95
1.05
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
3.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 4.)
2. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or
4.
5.
6.
33
1.8
2.0
Bhp
0.73
0.82
0.88
0.98
1.07
1.18
1.30
premature motor failure. Unit warranty will not be affected. For additional
information on motor performance, refer to Evaporator-Fan Motor Data
tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Motor drive range: 760 to 1090 rpm for standard motors; 1075 to 1455 rpm
for high-static motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
Use of a field-supplied motor may affect wire sizing. Contact your Bryant
representative to verify.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.1
Rpm
514
545
577
609
642
675
709
743
778
0.2
Bhp
0.15
0.18
0.21
0.26
0.30
0.36
0.41
0.48
0.55
Rpm
590
615
642
670
699
728
759
790
836
0.3
Bhp
0.20
0.23
0.27
0.31
0.36
0.42
0.48
0.55
0.62
Rpm
657
680
704
729
755
782
810
838
875
External Static Pressure (in. wg)
0.4
0.6
Bhp
Rpm
Bhp
Rpm
Bhp
0.25
723
0.30
828
0.42
849
0.47
0.29
744
0.35
870
0.52
0.33
766
0.39
892
0.58
0.38
788
0.44
913
0.64
0.43
811
0.49
935
0.71
0.49
836
0.55
860
0.62
957
0.78
0.55
886
0.69
980
0.86
0.62
0.70
913
0.77
1004
0.94
551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.1
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
999
0.66
1018
0.67
1036
0.68
1073
0.71
1200
1025
0.74
1058
0.79
1090
0.84
1121
0.87
1300
1042
0.81
1080
0.88
1118
0.95
1175
1.06
1400
1060
0.88
1098
0.96
1136
1.04
1500
1205
1.19
1224
1.29
1080
0.95
1117
1.04
1153
1.12
1600
1101
1.03
1137
1.12
1172
1.20
1241
1.38
1700
1192
1.29
1258
1.48
1122
1.11
1157
1.20
1800
1143
1.21
1179
1.30
1214
1.39
1279
1.58
1900
1165
1.31
1200
1.40
1235
1.49
1300
1.69
2000
0.7
Rpm
876
895
915
936
957
979
1001
1023
1046
1.6
Rpm
1109
1159
1206
1258
1287
1307
1323
1341
1361
0.8
Bhp
0.49
0.54
0.59
0.65
0.72
0.79
0.86
0.95
1.03
Rpm
924
940
959
980
1001
1023
1044
1066
1088
Bhp
0.55
0.60
0.66
0.72
0.79
0.86
0.94
1.03
1.12
1.8
Bhp
0.75
0.90
1.09
1.30
1.45
1.56
1.67
1.78
1.90
Rpm
1138
1193
1244
1289
1337
1366
1385
1402
1419
Bhp
0.79
0.95
1.12
1.34
1.56
1.73
1.86
1.98
2.10
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
0.2
Rpm
590
615
642
670
699
728
759
790
836
Bhp
0.30
0.35
0.39
0.44
0.49
0.55
0.62
0.69
0.77
External Static Pressure (in. wg)
0.6
Rpm
Bhp
828
0.42
849
0.47
870
0.52
892
0.58
913
0.64
935
0.71
957
0.78
980
0.86
1004
0.94
Rpm
924
940
959
980
1001
1023
1044
1066
1088
Bhp
0.71
0.87
1.06
1.19
1.29
1.38
1.48
1.58
1.69
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1109
0.75
1159
0.90
1206
1.09
1258
1.30
1287
1.45
1307
1.56
1323
1.67
1341
1.78
1361
1.90
Rpm
1138
1193
1244
1289
1337
1366
1385
1402
1419
0.4
Bhp
0.20
0.23
0.27
0.31
0.36
0.42
0.48
0.55
0.62
Rpm
723
744
766
788
811
836
860
886
913
0.8
1.0
Bhp
0.55
0.60
0.66
0.72
0.79
0.86
0.94
1.03
1.12
Rpm
999
1025
1042
1060
1080
1101
1122
1143
1165
Bhp
0.79
0.95
1.12
1.34
1.56
1.73
1.86
1.98
2.10
Rpm
1162
1218
1270
1316
1365
1395
1414
1432
1449
Bhp
0.66
0.74
0.81
0.88
0.95
1.03
1.11
1.21
1.31
551B048 (4 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
1200
1300
1400
1500
1600
1700
1800
1900
2000
Bhp
FIOP
1.2
Rpm
1036
1090
1118
1136
1153
1172
1192
1214
1235
1.4
Bhp
0.68
0.84
0.95
1.04
1.12
1.20
1.29
1.39
1.49
Rpm
1073
1121
1175
1205
1224
1241
1258
1279
1300
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.20 for standard motors; 2.40 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
34
1.8
2.0
Bhp
0.84
1.01
1.19
1.43
1.66
1.84
1.98
2.11
2.24
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 840 to 1185 rpm for standard motors; 1075 to 1455 rpm
for high-static motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B060 (5 TONS) STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS
External Static Pressure (in. wg)
Airflow
0.1
0.2
0.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1500
665
0.31
729
0.35
843
0.47
1600
703
0.36
763
0.40
872
0.53
1700
741
0.40
801
0.47
902
0.60
1800
765
0.45
821
0.51
923
0.65
1900
802
0.45
854
0.58
953
0.73
2000
840
0.60
888
0.66
984
0.82
2100
878
0.69
923
0.75
1015
0.91
1046
1.01
2200
916
0.78
958
0.85
1079
1.13
2300
954
0.89
993
0.96
1029
1.07
1112
1.25
2400
993
1.00
1031
1.13
1066
1.20
1145
1.39
2500
Rpm
940
965
993
1019
1046
1073
1101
1129
1160
1190
1220
551B060 (5 TONS) STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1108
0.89
1187
1.06
1202
1500
1130
0.97
1206
1.14
1275
1600
1152
1.05
1226
1.23
1298
1700
1178
1.14
1249
1.32
1316
1800
1201
1.23
1274
1.43
1338
1900
1226
1.33
1297
1.53
1363
2000
1388
1252
1.45
1320
1.64
2100
1410
1280
1.58
1345
1.77
2200
1372
1.91
1434
1309
1.71
2300
1336
1.85
1400
2.06
1459
2400
1363
2.00
1428
2.22
1486
2500
Rpm
1079
1281
1359
1382
1402
1424
1448
1473
1496
1519
1543
0.6
Rpm
940
965
993
1019
1046
1073
1101
1129
1160
1190
1220
551B060 (5 TONS) STANDARD MOTOR (BELT DRIVE) — THREE-PHASE UNITS (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1187
1.06
1202
1500
1108
0.89
1130
0.97
1206
1.14
1275
1600
1152
1.05
1226
1.23
1298
1700
1178
1.14
1249
1.32
1316
1800
1201
1.23
1274
1.43
1338
1900
1226
1.33
1297
1.53
1363
2000
1252
1.45
1320
1.64
1388
2100
1280
1.58
1345
1.77
1410
2200
1309
1.71
1372
1.91
1434
2300
1336
1.85
1400
2.06
1459
2400
1486
1363
2.00
1428
2.22
2500
Rpm
1079
1281
1359
1382
1402
1424
1448
1473
1496
1519
1543
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.80 for single-phase standard motors; 2.40 for
3-phase standard motors; and 2.90 for high-static motors. Extensive motor
and electrical testing on these units ensures that the full range of the motor
can be utilized with confidence. Using your fan motors up to the ratings
7.
35
Rpm
1026
1049
1077
1099
1126
1154
1182
1209
1237
1264
1292
Bhp
0.74
0.81
0.89
0.96
1.06
1.16
1.27
1.39
1.51
1.63
1.77
1.6
Bhp
1.18
1.32
1.41
1.52
1.62
1.73
1.85
1.97
2.11
2.26
2.43
551B060 (5 TONS) STANDARD MOTOR (BELT DRIVE) — THREE-PHASE UNITS
External Static Pressure (in. wg)
Airflow
0.1
0.2
0.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1500
665
0.31
729
0.35
843
0.47
1600
703
0.36
763
0.40
872
0.53
1700
741
0.40
801
0.47
902
0.60
1800
765
0.45
821
0.51
923
0.65
1900
802
0.45
854
0.58
953
0.73
2000
840
0.60
888
0.66
984
0.82
2100
878
0.69
923
0.75
1015
0.91
2200
916
0.78
958
0.85
1046
1.01
2300
954
0.89
993
0.96
1079
1.13
2400
993
1.00
1029
1.07
1112
1.25
1145
1.39
2500
1031
1.13
1066
1.20
Bhp
FIOP
0.8
Bhp
0.60
0.66
0.75
0.81
0.90
0.99
1.08
1.19
1.31
1.43
1.57
Bhp
1.10
1.44
1.60
1.72
1.83
1.94
2.07
2.20
2.34
2.48
2.65
0.6
0.8
Bhp
0.60
0.66
0.75
0.81
0.90
0.99
1.08
1.19
1.31
1.43
1.57
Rpm
1026
1049
1077
1099
1126
1154
1182
1209
1237
1264
1292
Bhp
0.74
0.81
0.89
0.96
1.06
1.16
1.27
1.39
1.51
1.63
1.77
1.6
Bhp
1.18
1.32
1.41
1.52
1.62
1.73
1.85
1.97
2.11
2.26
2.43
Bhp
1.10
1.44
1.60
1.72
1.83
1.94
2.07
2.20
2.34
2.48
2.65
shown will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 1020 to 1460 rpm for single-phase standard motors;
1120 to 1585 for 3-phase standard motors; and 1300 to 1685 rpm for highstatic motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B060 (5 TONS) HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
0.2
Rpm
722
754
787
821
854
900
923
958
993
1029
1066
Bhp
0.46
0.52
0.58
0.65
0.73
0.82
0.91
1.01
1.13
1.25
1.39
External Static Pressure (in. wg)
0.6
Rpm
Bhp
937
0.59
963
0.65
991
0.73
1019
0.81
1046
0.90
1073
0.99
1101
1.08
1129
1.19
1160
1.31
1190
1.43
1220
1.57
Rpm
1027
1052
1075
1099
1126
1154
1182
1209
1237
1264
1292
Bhp
1.30
1.35
1.42
1.52
1.62
1.73
1.80
1.97
2.11
2.26
2.43
External Static Pressure (in. wg)
1.6
Rpm
Bhp
1343
1.58
1350
1.61
1364
1.64
1382
1.72
1402
1.80
1424
1.94
1448
2.07
1473
2.20
1496
2.34
1519
2.48
1543
2.65
Rpm
1431
1424
1432
1447
1464
1484
1505
1529
1554
1578
1600
0.4
Bhp
0.33
0.38
0.44
0.51
0.58
0.66
0.75
0.85
0.96
1.07
1.20
Rpm
840
867
895
923
953
984
1015
1046
1079
1112
1145
0.8
1.0
Bhp
0.74
0.81
0.88
0.96
1.06
1.16
1.27
1.39
1.51
1.63
1.77
Rpm
1108
1130
1154
1178
1201
1226
1252
1280
1309
1339
1363
Bhp
1.79
1.80
1.89
1.95
2.05
2.16
2.29
2.43
2.58
2.76
2.89
Rpm
1480
1473
1481
1497
1514
1535
1557
1581
1607
1632
1655
Bhp
0.90
0.97
1.06
1.14
1.23
1.33
1.45
1.58
1.71
1.80
2.00
551B060 (5 TONS) HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Bhp
FIOP
1.2
Rpm
1186
1205
1228
1249
1274
1297
1320
1345
1372
1400
1428
1.4
Bhp
1.08
1.15
1.23
1.32
1.43
1.53
1.64
1.77
1.91
2.06
2.22
Rpm
1263
1278
1296
1316
1338
1363
1388
1410
1434
1459
1486
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 1.80 for single-phase standard motors; 2.40 for
3-phase standard motors; and 2.90 for high-static motors. Extensive motor
and electrical testing on these units ensures that the full range of the motor
can be utilized with confidence. Using your fan motors up to the ratings
7.
36
1.8
2.0
Bhp
1.98
1.99
2.09
2.16
2.27
2.39
2.53
2.69
2.85
3.05
3.20
shown will not result in nuisance tripping or premature motor failure. Unit
warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Motor drive range: 1020 to 1460 rpm for single-phase standard motors;
1120 to 1585 for 3-phase standard motors; and 1300 to 1685 rpm for highstatic motors. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B072 (6 TONS) STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.1
Rpm
765
802
840
878
916
954
993
1031
1070
1109
1148
1188
1227
0.2
Bhp
0.45
0.45
0.60
0.69
0.78
0.89
1.00
1.13
1.26
1.41
1.57
1.74
1.92
Rpm
821
854
888
923
958
993
1029
1066
1103
1140
1177
1215
1253
Bhp
0.51
0.58
0.66
0.75
0.85
0.96
1.07
1.20
1.34
1.48
1.64
1.81
2.00
External Static Pressure (in. wg)
0.4
Rpm
Bhp
923
0.65
953
0.73
984
0.82
1015
0.91
1046
1.01
1079
1.13
1112
1.25
1145
1.39
1179
1.52
1212
1.67
1246
1.83
1281
2.00
1316
2.19
551B072 (6 TONS) STANDARD MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.0
1.2
1.4
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
1178
1.14
1249
1.32
1316
1800
1201
1.23
1274
1.43
1338
1900
1226
1.33
1297
1.53
1363
2000
1252
1.45
1320
1.64
1388
2100
1280
1.58
1345
1.77
1410
2200
1309
1.71
1372
1.91
1434
2300
1336
1.85
1400
2.06
1459
2400
1363
2.00
1428
2.22
1486
2500
1514
1390
2.15
1456
2.38
2600
1483
2.56
1543
1418
2.31
2700
1446
2.48
1510
2.73
—
2800
1476
2.67
1537
2.92
—
2900
1506
2.88
—
—
—
3000
0.6
Rpm
1019
1046
1073
1101
1129
1160
1190
1220
1251
1283
1316
1349
1382
0.8
Bhp
0.81
0.90
0.99
1.08
1.19
1.31
1.43
1.57
1.71
1.87
2.04
2.22
2.42
Rpm
1099
1126
1154
1182
1209
1237
1264
1292
1322
1352
1383
1413
1444
Bhp
0.96
1.06
1.16
1.27
1.39
1.51
1.63
1.77
1.92
2.09
2.26
2.44
2.63
1.6
Bhp
1.52
1.62
1.73
1.85
1.97
2.11
2.26
2.43
2.61
2.80
—
—
—
Rpm
1382
1402
1424
1448
1473
1496
1519
1543
1569
—
—
—
—
Bhp
1.72
1.83
1.94
2.07
2.20
2.34
2.48
2.65
2.83
—
—
—
—
551B072 (6 TONS) HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
0.2
Rpm
821
854
888
923
958
993
1029
1066
1103
1140
1177
1215
1253
0.4
Bhp
0.51
0.58
0.66
0.75
0.85
0.96
1.07
1.20
1.34
1.48
1.64
1.81
2.00
Rpm
923
953
984
1015
1046
1079
1112
1145
1179
1212
1246
1281
1316
Bhp
0.65
0.73
0.82
0.91
1.01
1.13
1.25
1.39
1.52
1.67
1.83
2.00
2.19
External Static Pressure (in. wg)
0.6
Rpm
Bhp
1019
0.81
1046
0.90
1073
0.99
1101
1.08
1129
1.19
1160
1.31
1190
1.43
1220
1.57
1251
1.71
1283
1.87
1316
2.04
1349
2.22
1382
2.42
0.8
Rpm
1099
1126
1154
1182
1209
1237
1264
1292
1322
1352
1383
1413
1444
1.0
Bhp
0.96
1.06
1.16
1.27
1.39
1.51
1.63
1.77
1.92
2.09
2.26
2.44
2.63
Rpm
1178
1201
1226
1252
1280
1309
1336
1363
1390
1418
1446
1476
1506
Bhp
1.14
1.23
1.33
1.45
1.58
1.71
1.85
2.00
2.15
2.31
2.48
2.67
2.88
551B072 (6 TONS) HIGH-STATIC MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
1.6
1.8
2.0
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
1316
1.52
1382
1.72
1427
1.89
1468
2.06
1800
1249
1.32
1338
1.62
1402
1.83
1447
2.01
1489
2.19
1900
1274
1.43
1363
1.73
1424
1.94
1470
2.13
1512
2.32
2000
1297
1.53
1320
1.64
1388
1.85
1448
2.07
1495
2.28
1538
2.48
2100
1345
1.77
1410
1.97
1473
2.20
1621
2.42
1564
2.64
2200
1372
1.91
1434
2.11
1496
2.34
1544
2.57
1589
2.80
2300
1613
2.97
1400
2.06
1459
2.26
1519
2.48
1568
2.73
2400
1593
2.92
1639
3.17
1428
2.22
1486
2.43
1543
2.65
2500
1620
3.11
1666
3.39
1456
2.38
1514
2.61
1569
2.83
2600
1600
3.12
1651
3.43
1699
3.74
1483
2.56
1543
2.80
2700
1574
3.09
1632
3.45
1685
3.79
1733
4.13
1510
2.73
2800
1537
2.92
1602
3.31
1661
3.69
1715
4.06
1764
4.42
2900
1582
3.34
1649
3.78
1710
4.21
1765
4.64
—
—
3000
premature motor failure. Unit warranty will not be affected. For additional
LEGEND
information on motor performance, refer to Evaporator-Fan Motor Data
Bhp
— Brake Horsepower Input to Fan
tables on pages 42 and 43.
FIOP — Factory-Installed Option
4. Values include losses for filters, unit casing, and wet coils. See page 43 for
NOTES:
accessory/FIOP static pressure information.
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
5. Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
2.
indicates field-supplied motor and drive are required.
6. Motor drive range: 1120 to 1585 rpm for standard motors; 1300 to 1685 rpm
3. Maximum continuous bhp is 2.40 for standard motors; 2.90 for high-static
for high-static motors. All other rpms require field-supplied drive.
motors. Extensive motor and electrical testing on these units ensures that
7. Interpolation is permissible. Do not extrapolate.
the full range of the motor can be utilized with confidence. Using your fan
motors up to the ratings shown will not result in nuisance tripping or
Airflow
(Cfm)
1.2
1.4
37
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
2250
2300
2400
2500
2550
2660
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
0.2
Rpm
465
471
482
494
501
507
520
533
546
559
572
585
598
610
623
636
649
655
0.4
Bhp
0.43
0.45
0.50
0.54
0.57
0.59
0.65
0.71
0.77
0.83
0.90
0.96
1.03
1.10
1.17
1.25
1.33
1.37
Rpm
554
559
569
581
587
592
604
615
626
637
648
660
671
682
694
707
720
727
Bhp
0.64
0.66
0.71
0.76
0.79
0.82
0.89
0.95
1.02
1.09
1.17
1.24
1.32
1.41
1.50
1.60
1.71
1.77
External Static Pressure (in. wg)
0.6
Rpm
Bhp
630
0.86
635
0.89
645
0.95
654
1.01
659
1.05
663
1.08
672
1.14
683
1.20
693
1.27
704
1.35
715
1.43
727
1.52
739
1.62
750
1.72
761
1.82
772
1.93
783
2.03
789
2.09
0.8
Rpm
695
699
708
717
722
727
737
747
756
765
775
785
795
806
817
828
840
846
1.0
Bhp
1.09
1.12
1.18
1.25
1.29
1.32
1.40
1.49
1.57
1.66
1.74
1.83
1.91
2.01
2.11
2.23
2.35
2.42
Rpm
757
760
768
776
780
784
793
802
813
823
832
841
851
860
870
880
890
896
Bhp
2.50
2.55
2.64
2.72
2.77
2.82
2.91
3.01
3.12
3.22
3.34
—
—
—
—
—
—
—
Rpm
855
887
935
972
986
999
1019
1034
—
—
—
—
—
—
—
—
—
—
Bhp
1.34
1.37
1.44
1.51
1.55
1.58
1.66
1.75
1.84
1.94
2.05
2.15
2.26
2.36
2.47
2.57
2.69
2.75
551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
2250
2300
2400
2500
2550
2660
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
Bhp
FIOP
1.2
Rpm
810
816
824
832
836
839
846
855
863
872
882
892
902
912
921
930
940
945
1.4
Bhp
1.62
1.65
1.72
1.79
1.83
1.87
1.95
2.04
2.13
2.22
2.33
2.45
2.57
2.69
2.82
2.95
3.07
3.14
Rpm
850
859
872
882
887
891
898
906
913
921
930
939
948
958
968
978
—
—
Bhp
1.91
1.94
2.01
2.09
2.13
2.17
2.26
2.35
2.44
2.54
2.65
2.76
2.88
3.01
3.15
3.29
—
—
External Static Pressure (in. wg)
1.6
Rpm
Bhp
873
2.20
888
2.24
909
2.32
925
2.40
931
2.45
936
2.49
946
2.58
954
2.67
961
2.77
969
2.88
976
2.99
984
3.10
993
3.21
1002
3.34
—
—
—
—
—
—
—
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates a high-static motor and drive are required.
6.
3. Maximum continuous bhp is 2.90 for standard motors; 4.20 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
38
1.8
Rpm
863
897
931
955
964
973
987
997
1006
1014
1021
—
—
—
—
—
—
—
2.0
Bhp
2.78
2.85
2.96
3.06
3.11
3.16
3.26
3.36
—
—
—
—
—
—
—
—
—
—
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 840 to 1085 rpm. High-static motor drive range:
860 to 1060 rpm. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
Airflow
(Cfm)
2550
2660
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250
0.2
Rpm
501
507
520
533
546
559
572
585
598
610
623
636
649
655
661
674
687
699
712
719
0.4
Bhp
0.57
0.59
0.65
0.71
0.77
0.83
0.90
0.96
1.03
1.10
1.17
1.25
1.33
1.37
1.41
1.49
1.57
1.60
1.75
1.80
Rpm
587
592
604
615
626
637
648
660
671
682
694
707
720
727
733
746
759
772
785
792
Bhp
0.79
0.82
0.89
0.95
1.02
1.09
1.17
1.24
1.32
1.41
1.50
1.60
1.71
1.77
1.82
1.93
2.05
2.17
2.30
2.37
External Static Pressure (in. wg)
0.6
Rpm
Bhp
659
1.05
663
1.08
672
1.14
683
1.20
693
1.27
704
1.35
715
1.43
727
1.52
739
1.62
750
1.72
761
1.82
772
1.93
783
2.03
789
2.09
795
2.15
806
2.26
817
2.38
828
2.50
840
2.64
846
2.71
0.8
Rpm
722
727
737
747
756
765
775
785
795
806
817
828
840
846
852
863
874
885
897
903
1.0
Bhp
1.29
1.32
1.40
1.49
1.57
1.66
1.74
1.83
1.91
2.01
2.11
2.23
2.35
2.42
2.48
2.61
2.75
2.88
3.03
3.10
Rpm
780
784
793
802
813
823
832
841
851
860
870
880
890
896
901
912
923
935
947
—
Bhp
2.77
2.82
2.91
3.01
3.12
3.22
3.34
—
—
—
—
—
—
—
—
—
—
—
—
—
Rpm
986
999
1019
1034
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Bhp
1.55
1.58
1.66
1.75
1.84
1.94
2.05
2.15
2.26
2.36
2.47
2.57
2.69
2.75
2.80
2.93
3.08
3.23
3.39
—
551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
2550
2660
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250
Bhp
FIOP
1.2
Rpm
836
839
846
855
863
872
882
892
902
912
921
930
940
945
949
959
—
—
—
—
1.4
Bhp
1.83
1.87
1.95
2.04
2.13
2.22
2.33
2.45
2.57
2.69
2.82
2.95
3.07
3.14
3.20
3.33
—
—
—
—
Rpm
887
891
898
906
913
921
930
939
948
958
968
978
—
—
—
—
—
—
—
—
Bhp
2.13
2.17
2.26
2.35
2.44
2.54
2.65
2.76
2.88
3.01
3.15
3.29
—
—
—
—
—
—
—
—
External Static Pressure (in. wg)
1.6
Rpm
Bhp
931
2.45
936
2.49
946
2.58
954
2.67
961
2.77
969
2.88
976
2.99
984
3.10
993
3.21
1002
3.34
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates a high-static motor and drive are required.
6.
3. Maximum continuous bhp is 2.90 for standard motors; 4.20 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
39
1.8
Rpm
964
973
987
997
1006
1014
1021
—
—
—
—
—
—
—
—
—
—
—
—
—
2.0
Bhp
3.11
3.16
3.26
3.36
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 840 to 1085 rpm. High-static motor drive range:
860 to 1060 rpm. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)
551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE)
External Static Pressure (in. wg)
Airflow
0.2
0.4
0.6
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
3000
459
0.35
595
0.74
657
0.88
3100
478
0.46
605
0.79
667
0.94
3200
500
0.57
615
0.85
679
1.01
3300
519
0.62
625
0.90
691
1.08
3400
537
0.69
637
0.97
702
1.16
3500
561
0.77
647
1.03
712
1.23
3600
592
0.86
658
1.10
721
1.30
3700
607
0.97
670
1.18
732
1.37
3800
621
1.05
681
1.25
742
1.45
3900
636
1.13
693
1.32
751
1.53
4000
650
1.21
705
1.40
761
1.61
4100
665
1.30
717
1.48
772
1.71
4200
680
1.39
728
1.57
783
1.81
4300
696
1.49
739
1.66
794
1.91
4400
711
1.60
750
1.75
805
2.02
4500
727
1.70
762
1.85
817
2.12
4600
742
1.82
774
1.96
828
2.23
4700
758
1.94
786
2.07
840
2.34
4800
773
2.06
799
2.18
852
2.46
863
2.57
4900
789
2.19
812
2.30
875
2.70
5000
805
2.32
826
2.43
Rpm
716
725
734
744
753
762
773
782
795
808
819
830
839
848
857
867
877
888
899
910
921
551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) (cont)
External Static Pressure (in. wg)
Airflow
1.2
1.4
1.6
(Cfm)
Rpm
Bhp
Rpm
Bhp
Rpm
Bhp
872
1.69
919
1.88
3000
822
1.44
882
1.73
932
2.00
3100
829
1.50
837
1.56
886
1.78
943
2.06
3200
845
1.63
892
1.85
947
2.10
3300
853
1.71
899
1.93
951
2.17
3400
862
1.78
907
2.01
959
2.24
3500
871
1.86
915
2.09
965
2.32
3600
879
1.95
927
2.17
973
2.38
3700
889
2.03
934
2.26
980
2.48
3800
898
2.12
942
2.36
987
2.59
3900
908
2.21
950
2.46
994
2.70
4000
917
2.32
960
2.55
1001
2.81
4100
925
2.44
969
2.65
1009
2.92
4200
935
2.56
979
2.77
1018
3.03
4300
945
2.68
988
2.89
1028
3.14
4400
955
2.82
996
3.02
1037
3.25
4500
967
2.96
1005
3.16
1046
3.38
4600
980
3.11
1015
3.30
1056
3.52
4700
992
3.26
1025
3.45
1064
3.67
4800
1073
3.83
1003
3.41
1036
3.61
4900
1049
3.79
1083
4.00
1014
3.56
5000
Rpm
950
965
978
988
995
1000
1005
1013
1022
1030
1037
1045
1051
1058
1066
1074
1084
1093
1103
1112
1121
Bhp
FIOP
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
4.
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 6.)
2.
5.
indicates a field-supplied motor and drive are required.
6.
3. Maximum continuous bhp is 3.70 for standard motors; 5.25 for high-static
motors. Extensive motor and electrical testing on these units ensures that
the full range of the motor can be utilized with confidence. Using your fan
7.
40
0.8
1.0
Bhp
1.05
1.10
1.16
1.23
1.30
1.38
1.47
1.56
1.66
1.76
1.86
1.96
2.05
2.14
2.24
2.35
2.46
2.59
2.72
2.86
2.99
Rpm
770
779
787
796
805
814
823
833
842
851
861
871
883
896
908
919
929
938
947
957
966
Bhp
1.70
1.80
1.91
2.05
2.17
2.33
2.46
2.57
2.69
2.81
2.92
3.04
3.17
3.29
3.41
3.54
3.66
3.79
3.92
4.07
4.23
Rpm
962
971
984
995
1008
1021
1036
1046
1058
1068
1077
1085
1092
1100
1106
1113
1121
1129
1137
1147
1157
1.8
Bhp
1.24
1.30
1.36
1.43
1.50
1.57
1.65
1.73
1.82
1.92
2.02
2.13
2.25
2.38
2.51
2.63
2.75
2.87
2.98
3.11
3.24
2.0
Bhp
1.82
1.95
2.07
2.20
2.32
2.47
2.59
2.73
2.87
3.01
3.14
3.21
3.40
3.53
3.67
3.81
3.95
4.09
4.22
4.36
4.50
motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Evaporator-Fan Motor Data tables on
pages 42 and 43.
Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify.
Standard motor drive range: 860 to 1080 rpm. High-static motor drive range:
830 to 1130 rpm. All other rpms require field-supplied drive.
Interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont))
551B150 (121/2 TONS) — STANDARD MOTOR (BELT DRIVE)
Airflow
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200
6300
0.2
Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
869
885
901
917
933
949
965
981
997
1014
0.4
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.92
3.09
3.26
3.44
3.62
3.81
4.01
4.21
4.42
4.64
Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
868
882
897
911
926
941
956
972
987
1002
1018
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.85
3.01
3.17
3.33
3.50
3.68
3.87
4.06
4.26
4.46
4.68
External Static Pressure (in. wg)
0.6
Rpm
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
863
2.57
875
2.70
887
2.83
898
2.96
909
3.09
920
3.24
932
3.38
943
3.54
956
3.70
968
3.87
981
4.05
995
4.23
1008
4.42
1022
4.62
1036
4.83
Rpm
—
—
—
—
—
—
—
—
867
877
888
899
910
921
932
943
955
967
978
990
1002
1013
1025
1037
1042
1058
1070
External Static Pressure (in. wg)
1.6
Rpm
Bhp
973
2.38
980
2.48
987
2.59
994
2.70
1001
2.81
1009
2.92
1018
3.03
1028
3.14
1037
3.25
1046
3.38
1056
3.52
1064
3.67
1073
3.83
1083
4.00
1093
4.17
1103
4.34
1115
4.53
1128
4.74
1140
4.94
1152
5.14
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Rpm
1013
1022
1030
1037
1045
1051
1058
1066
1074
1084
1093
1103
1112
1121
1129
1138
1148
1158
1168
—
—
—
—
—
—
—
—
0.8
1.0
Bhp
—
—
—
—
—
—
—
—
2.35
2.46
2.59
2.72
2.86
2.99
3.13
3.28
3.42
3.57
3.72
3.87
4.03
4.20
4.37
4.55
4.73
4.91
5.11
Rpm
—
—
—
861
871
883
896
908
919
929
938
947
957
966
976
987
998
1009
1029
1031
1042
1053
1065
1076
1088
—
—
Bhp
2.57
2.69
2.81
2.92
3.04
3.17
3.29
3.41
3.54
3.66
3.79
3.92
4.07
4.23
4.40
4.58
4.76
4.95
5.15
—
—
—
—
—
—
—
—
Rpm
1046
1058
1068
1077
1085
1092
1100
1106
1113
1121
1129
1137
1147
1157
1166
1175
1184
1193
—
—
—
—
—
—
—
—
—
Bhp
—
—
—
2.02
2.13
2.25
2.38
2.51
2.63
2.75
2.87
2.98
3.11
3.24
3.38
3.53
3.69
3.86
4.03
4.20
4.38
4.56
4.74
4.92
5.10
—
—
551B150 (121/2 TONS) — STANDARD MOTOR (BELT DRIVE) (cont)
Airflow
(Cfm)
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000
5100
5200
5300
5400
5500
5600
5700
5800
5900
6000
6100
6200
6300
Bhp
FIOP
1.2
Rpm
879
889
898
908
917
925
935
945
955
967
980
992
1003
1014
1024
1033
1042
1051
1061
1071
1081
1092
1103
1114
—
—
—
1.4
Bhp
1.95
2.03
2.12
2.21
2.32
2.44
2.56
2.68
2.82
2.96
3.11
3.26
3.41
3.56
3.71
3.84
3.98
4.14
4.30
4.46
4.64
4.84
5.04
5.24
—
—
—
Rpm
927
934
942
950
960
969
979
988
996
1005
1015
1025
1036
1049
1061
1073
1084
1095
1105
1114
1123
1132
—
—
—
—
—
Bhp
2.17
2.26
2.36
2.46
2.55
2.65
2.77
2.89
3.02
3.16
3.30
3.45
3.61
3.79
3.96
4.14
4.31
4.49
4.66
4.81
4.98
5.15
—
—
—
—
—
1.8
2.0
Bhp
2.73
2.87
3.01
3.14
3.21
3.40
3.53
3.67
3.81
3.95
4.09
4.22
4.36
4.50
4.66
4.82
5.01
5.20
—
—
—
—
—
—
—
—
—
will not result in nuisance tripping or premature motor failure. Unit warranty
will not be affected.
3. Values include losses for filters, unit casing, and wet coils. See page 43 for
accessory/FIOP static pressure information.
4. Use of a field-supplied motor may affect wire sizing. Contact Bryant representative to verify. For additional information on motor performance, refer to
Evaporator-Fan Motor Data table on pages 42 and 43.
5. Standard motor drive range: 900 to 1260 rpm.
6. Interpolation is permissible. Do not extrapolate.
LEGEND
— Brake Horsepower Input to Fan
— Factory-Installed Option
NOTES:
1. Boldface indicates a field-supplied drive is required. (See Note 5.)
2. Maximum continuous bhp is 5.25 with standard motor. Extensive motor and
electrical testing on these units ensures that the full range of the motor can
be utilized with confidence. Using your fan motors up to the ratings shown
41
PERFORMANCE DATA (cont)
FAN RPM AT MOTOR PULLEY SETTING*; STANDARD MOTOR/DRIVE
UNIT
551B
036
048
060
(single-phase)
060 (3-phase)
and 072
090, 102
120
150
MOTOR PULLEY TURNS OPEN
21 / 2
3
31 / 2
0
1/2
1
11 / 2
2
4
41 / 2
5
51 / 2
6
1090
1185
1055
1150
1025
1115
990
1080
960
1045
925
1015
890
980
860
945
825
910
795
875
760
840
—
—
—
—
1460
1425
1385
1350
1315
1275
1240
1205
1165
1130
1095
1055
1020
1585
1540
1490
1445
1400
1350
1305
1260
1210
1165
1120
—
—
1085
1080
1260
1060
1060
1220
1035
1035
1185
1010
1015
1155
985
990
1130
960
970
1100
935
950
1075
910
925
1045
890
905
1015
865
880
990
840
860
960
—
—
930
—
—
900
*Approximate fan rpm shown.
FAN RPM AT MOTOR PULLEY SETTING*; HIGH-STATIC MOTOR/DRIVE
UNIT
551B
0
1/2
1
11 / 2
2
036
048
060
072
090
102
120
1455
1455
1685
1685
1080
1080
1130
1423
1423
1589
1589
1025
1025
1112
1392
1392
1557
1557
1007
1007
1087
1360
1360
1525
1525
988
988
1062
1328
1328
1493
1493
970
970
1037
MOTOR PULLEY TURNS OPEN
21 / 2
3
31 / 2
1297
1297
1460
1460
952
952
1212
1265
1265
1428
1428
933
933
987
1233
1233
1396
1396
915
915
962
4
41 / 2
5
51 / 2
6
1202
1202
1364
1364
897
897
937
1170
1170
1332
1332
878
878
912
1138
1138
1300
1300
860
860
887
1107
1107
—
—
—
—
862
1075
1075
—
—
—
—
830
*Approximate fan rpm shown.
EVAPORATOR-FAN MOTOR DATA — STANDARD MOTOR
UNIT
551B
UNIT
PHASE
Single
MAXIMUM
CONTINUOUS BHP*
1.20
MAXIMUM
OPERATING WATTS*
1000
Three
1.20
1000
Single
1.20
1000
Three
1.20
1000
Single
1.80
2120
Three
2.40
2120
072
Three
2.40
2120
090, 102
Three
2.90
2615
120
Three
3.70
3775
150
Three
5.25
4400
036
048
060
UNIT VOLTAGE
208/230
208/230
460
575
208/230
208/230
460
575
208/230
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
MAXIMUM
AMP DRAW
4.9
4.9
2.2
2.2
4.9
4.9
2.2
2.2
8.8
6.7
3.0
3.0
6.7
3.0
3.0
8.6
3.9
3.9
12.2
5.5
5.5
17.3
8.5
8.5
*Extensive motor and electrical testing on these units ensures that the
full horsepower and watts range of the motors can be utilized with confidence. Using your fan motors up to the ratings shown in this table will
not result in nuisance tripping or premature motor failure. Unit warranty
will not be affected.
LEGEND
Bhp — Brake Horsepower
42
PERFORMANCE DATA (cont)
EVAPORATOR-FAN MOTOR DATA — HIGH-STATIC MOTORS
UNIT
551B
UNIT
PHASE
MAXIMUM
CONTINUOUS BHP*
MAXIMUM
OPERATING WATTS*
036
Three
2.40
2120
048
Three
2.40
2120
060
Three
2.90
2615
072
Three
2.90
2615
090, 102
Three
4.20
3775
120
Three
5.25
4400
MAXIMUM
AMP DRAW
6.7
3.0
3.0
6.7
3.0
3.0
8.6
3.9
3.9
8.6
3.9
3.9
12.2
5.5
5.5
17.3
8.5
8.5
UNIT VOLTAGE
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575
LEGEND
Bhp — Brake Horsepower
*Extensive motor and electrical testing on these units ensures that the
full horsepower and watts range of the motors can be utilized with
confidence. Using your fan motors up to the ratings shown in this table
will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
ACCESSORY/FIOP ECONOMIZERS AND
ELECTRIC HEATERS STATIC PRESSURE DROP (in. wg)
551B036-072
EVAPORATOR-FAN MOTOR EFFICIENCY
COMPONENT
1 Heater
Module
2 Heater
Modules
Durablade
Economizer
EconoMi$er
MOTOR 551B
036,048
060
072
090,102
120
150
CFM
900 1200 1400 1600 1800 2000 2200 2400 2600
0.05 0.07 0.09 0.09 0.10 0.11 0.11 0.12 0.13
0.15 0.16 0.16 0.16 0.17 0.17 0.17 0.18 0.18
*Single-phase/3-phase.
NOTE: Convert watts to bhp using the following formula:
0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05
0.05 0.09 0.13 0.17 0.22 0.27 0.32 0.39 0.45
bhp =
LEGEND
FIOP — Factory-Installed Option
1 Heater
Module
2 Heater
Modules
Durablade
Economizer
EconoMi$er
watts input x motor efficiency
746
FIOP PERFECT HUMIDITY™ DEHUMIDIFICATION
PACKAGE STATIC PRESSURE DROP (in. wg)
ACCESSORY/FIOP ECONOMIZERS AND
ELECTRIC HEATERS STATIC PRESSURE DROP (in. wg)
551B090-150
COMPONENT
EFFICIENCY
75
74/84*
84
80
85
87
CFM PER TON
UNIT SIZE
551B
UNIT NOMINAL
TONS
300
400
500
036
3
.04
.07
.09
048
4
.07
.12
.15
060
5
.09
.15
.21
072
6
.12
.20
.28
0.02 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09
090
71 / 2
.08
.13
.18
0.07 0.09 0.13 0.18 0.23 0.30 0.36
102
81 / 2
.10
.15
.22
120
10
.08
.13
.18
150
121/2
.11
.18
.26
CFM
2200 2500 3000 3500 4000 4500 5000 5500 6000
0.02 0.03 0.05 0.065 0.08 0.10 0.12 0.14 0.155
0.03 0.05 0.07 0.09 0.12 0.14 0.16 0.19 0.21
—
—
LEGEND
FIOP — Factory-Installed Option
LEGEND
FIOP — Factory-Installed Option
43
PERFORMANCE DATA (cont)
Durablade Economizer Barometric
Relief Damper Characteristics —
551B090-150
Durablade Economizer Barometric
Relief Damper Characteristics —
551B036-072
0.25
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
0.25
0.20
0.15
0.10
0.05
0.20
0.15
0.10
0.05
0.00
600
800
1000
FLOW IN CUBIC FEET PER MINUTE (cfm)
0.00
0
500
3 TO 6 TON
7 1/2 TO 12 1/2 TON
1000
1500
2000
3 to 6 Ton
71/2 to 121/2 Ton
FLOW (CFM)
Horizonal EconoMi$er Barometric Relief
Damper Characteristics
Vertical EconoMi$er Barometric Relief
Damper Characteristics
2500
5000
FLOW (cfm)
FLOW (cfm)
400
200
0
2000
2 FANS
OPERATING
1500
1 FAN
OPERATING
1000
500
4000
3000
2 FANS
OPERATING
2000
1 FAN
OPERATING
1000
0
0
0
0
0.1
0.2
0.3
0.4
0.1
0.2
0.3
0.4
0.5
STATIC PRESSURE (in. wg)
0.5
STATIC PRESSURE (in. wg)
EconoMi$er Power Exhaust Performance
(551B036-072)
EconoMi$er Power Exhaust Performance
(551B090-150)
44
PERFORMANCE DATA (cont)
FLOW IN CUBIC FEET PER MINUTE (cfm)
50
FLOW (CFM)
40
30
20
10
0
0
0.5
0.75
0.25
3 TO 6 TON
STATIC PRESSURE (in. wg)
7 1/2 TO 12 1/2 TON
1
80
60
40
20
0
0.00
0.10
0.20
0.40
0.30
0.50
STATIC PRESSURE (in. wg)
3 to 6 Ton
71/2 to 121/2 Ton
Vertical EconoMi$er Outdoor-Air Leakage
Horizontal EconoMi$er Outdoor Air Leakage
0.40
STATIC PRESSURE (in. wg)
STATIC PRESSURE (in. wg)
0.35
0.30
0.25
0.20
0.15
0.10
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.05
0.00
1200
2000
3 TO 6 TON
7 1/2 TO 12 1/2 TON
0
1000
2000
3000
4000
5000
FLOW IN CUBIC FEET PER MINUTE (cfm)
2800
3600
3 to 6 Ton
71/2 to 121/2 Ton
4400
FLOW (CFM)
Horizontal EconoMi$er Return Air Pressure Drop
Vertical EconoMi$er Return-Air Pressure Drop
OUTDOOR SOUND POWER (TOTAL UNIT)
OCTAVE BANDS
ARI RATING
(dB)
63 125 250 500 1000 2000
76
55.9 66.0 64.0 66.2 68.4 64.5
80
59.1 68.9 68.7 71.9 74.0 68.9
82
62.2 69.3 71.5 74.7 76.2 72.9
84
64.6 71.1 73.3 76.9 77.6 73.7
86
63.7 69.9 72.5 78.2 81.1 77.3
LEGEND
— Air Conditioning and Refrigeration Institute
— Sound Levels (decibels)
UNIT
551B
036,048
060,072
090,102
120
150
ARI
dB
4000
61.7
65.7
68.7
70.6
73.3
8000
57.3
59.0
61.5
63.7
66.8
45
ELECTRIC HEATING CAPACITIES
UNIT
551B
VOLTAGE
(60 Hz)
208/230
(single phase)
208/230
(3 phase)
036
460
(3 phase)
208/230
(single phase)
208/230
(3 phase)
048
460
(3 phase)
208/230
(single phase)
208/230
(3 phase)
060
460
(3 phase)
ACCESSORY
kW
ACCESSORY
HEATER
PART NUMBER
CRHEATER---A00
4.4
6.5
8.7
10.5
13.0*
4.4
6.5
8.7
10.5
16.0
6.0
8.8
11.5
14.0
4.4
8.7
13.0*
17.4*
21.0*
6.5
8.7
16.0
21.0*
6.0
11.5
14.0
23.0*
6.5
8.7
13.0*
17.4*
21.0*
6.5
10.5
16.0
21.0*
26.5*
6.0
11.5
14.0
23.0*
25.5*
101
102
103
104
102*
101
102
103
104
105
106
107
108
109
101
103
102*
103*
104*
102
103
105
104*
106
108
109
108*
102
103
102*
103*
104*
102
104
105
104*
105,104
106
108
109
108*
109,108
ACCESSORY
SINGLE
POINT BOX
PART NO.
CRSINGLE---A00
—
—
—
002
002
—
—
—
—
—
—
—
—
—
—
—
002
002
002
—
—
—
002
—
—
—
—
—
002
002
002
002
—
—
002
002
002
—
—
—
—
—
UNIT
551B
VOLTAGE
(60 Hz)
ACCESSORY
kW
ACCESSORY
HEATER
PART NUMBER
CRHEATER---A00
6.5
10.5
16.0
21.0*
26.5*
6.0
11.5
14.0
23.0*
25.5*
10.5
16.0
24.8
32.0
42.4*
14.0
16.5
27.8
33.0
41.7*
17.0
34.0
10.5
16.0
32.0
42.4*
50.0*
16.5
27.8
33.0
41.7*
50.0*
17.0
34.0
51.0*
102
104
105
104*
105,104
106
108
109
108*
109,108
117
110
111
112
112,117
116
113
114
115
114,116
118
119
117
110
112
112,117
112,110
113
114
115
114,116
115,113
118
119
119,118
208/230
(3 phase)
072
460
(3 phase)
208/230
(3 phase)
090,
102
460
(3 phase)
575
(3 phase)
208/230
(3 phase)
120,
150
460
(3 phase)
575
(3 phase)
ACCESSORY
SINGLE
POINT BOX
PART NO.
CRSINGLE---A00
—
—
002
002
002
—
—
—
—
—
006
006
007
007
007†
006
006
006
006
008
006
006
012
012
012
015
015
011
011
011**
014
014
011
011
014
*Two heater packages required to provide kW indicated.
†009 for 551B102 units.
**On units with factory-installed outlet, use CRSINGLE014A00.
NOTES:
1. The kW ratings shown above are at 240, 480, and 575 v. Use the Multiplication Factors
table below to determine heater capacity for your particular voltage.
MULTIPLICATION FACTORS
HEATER kW
RATING
VOLTAGE DISTRIBUTION
V/3/60
200
208
240
230
240
440
460
480
480
Example: 32.0 kW (at 240 v) heater on 208 v
= 32.0 (.75 mult factor)
= 24.0 kW capacity at 208 v
2.
MULTIPLICATION
FACTOR
.69
.75
.92
1.00
.84
.92
1.00
Heaters are not available for size 036-072 575-v units.
LEGEND AND NOTES FOR ELECTRICAL DATA TABLES
LEGEND
FLA
HACR
IFM
LRA
MCA
MOCP
NEC
OFM
RLA
UL
—
—
—
—
—
—
—
—
—
—
Example: Supply voltage is 460-3-60.
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor (Evaporator) Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor (Condenser) Fan Motor
Rated Load Amps
Underwriters’ Laboratories
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
=
*Used to determine minimum disconnect per NEC.
†Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v or 575 v. If power distribution voltage to unit varies form rated heater voltage, heater kW will vary accordingly.
**Fuse or HACR circuit breaker per NEC.
††Units have 2 condenser-fan motors.
452 + 464 + 455
3
1371
3
= 457
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
NOTES:
Maximum deviation is 7 v.
1. In compliance with NEC requirements for multimotor and combination load equipment (refer
to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or
HACR breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use
the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local
electric utility company immediately.
3.
4.
46
Non-fused disconnect switch cannot be used when rooftop unit electrical ratings exceed
80 amps.
575-v units have UL, Canada approval only. Electric heaters are not available for 036072, 575-v units.
ELECTRICAL DATA
STANDARD MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET
UNIT
551B036
(3 Tons)
551B048
(4 Tons)
551B060
(5 Tons)
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM
IFM
Min
Max
RLA
LRA
FLA
FLA
208/230-1-60
187
254
16.0
88.0
0.7
4.9
208/230-3-60
187
254
10.3
77.0
0.7
4.9
460-3-60
414
508
5.1
39.0
0.4
2.2
575-3-60
518
632
4.2
31.0
0.4
2.2
208/230-1-60
187
254
23.7
129.0
0.7
4.9
208/230-3-60
187
254
13.5
99.0
0.7
4.9
460-3-60
414
508
7.4
49.5
0.4
2.2
575-3-60
518
632
5.8
40.0
0.4
2.2
208/230-1-60
187
254
28.8
169.0
1.5
8.8
208/230-3-60
187
254
17.3
123.0
1.5
5.8
460-3-60
414
508
9.0
62.0
0.8
2.6
575-3-60
518
632
7.1
50.0
0.8
2.6
208/230-3-60
187
254
20.5
156.0
1.4
5.8
460-3-60
414
508
9.6
70.0
0.6
2.6
575-3-60
518
632
7.7
56.0
0.6
2.6
551B072
(6 Tons)
ELECTRIC HEAT
Nominal kW†
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
8.7/13.0
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
12.0/16.0
—
6.0
8.8
11.5
14.0
—
—
3.3/ 4.4
4.9/ 6.5
8.7/13.0
13.0/17.4
15.8/21.0
—
4.9/ 6.5
6.5/ 8.7
12.0/16.0
15.8/21.0
—
6.0
11.5
14.0
23.0
—
—
4.9/ 6.5
6.5/ 8.7
8.7/13.0
13.0/17.4
15.8/21.0
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
NOTE: See legend and notes on page 46.
47
FLA
—
15.9/18.3
23.5/27.1
31.4/36.3
37.9/43.1
46.9/54.2
—
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.5/38.6
—
7.2
10.6
13.8
16.8
—
—
15.9/18.3
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
—
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
—
7.2
13.8
16.6
27.7
—
—
23.5/27.1
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.1
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.7
—
POWER SUPPLY
MCA
MOCP
25.6/25.6
35/35**
26.0/29.0
35/35**
35.5/40.0
40/40**
45.4/51.4
50/60**
53.5/60.0
60/60**
64.8/73.8
70/80
18.5/18.5
25/25**
18.5/19.4
25/25**
23.1/25.7
25/30**
28.8/32.3
30/35**
33.5/37.7
35/40**
47.8/54.2
50/60**
9.0
15**
11.8
15**
16.0
20**
20.0
25**
23.8
25**
7.3
15**
35.2/ 35.2 45/ 45**
35.2/ 35.2 45/ 45**
45.4/ 51.4 50/ 60**
64.8/ 73.8 70/ 80
84.7/ 96.8 90/100
100.9/115.5 110/125
22.5/22.5
30/30**
23.1/25.7
30/30**
28.8/32.3
30/35**
47.8/54.2
50/60**
60.8/69.3
70/80
11.9
15**
11.9
15**
20.0
25**
23.8
25**
37.3
40**
9.3
15**
46.3/ 46.3 60/ 60**
46.3/ 46.3 60/ 60**
50.3/ 56.3 60/ 60**
69.7/ 78.7 70/ 80
89.5/101.6 90/110
105.8/120.4 110/125
28.9/28.9
35/35**
28.9/28.9
35/35**
34.6/38.8
35/40**
48.9/55.4
50/60**
62.0/70.4
70/80
76.3/86.9
80/90
20**
14.7
20**
14.7
25**
20.5
25**
24.3
40**
37.8
45**
40.8
11.6
15**
32.8/32.8
40/40**
32.8/32.8
40/40**
34.6/38.8
40/40**
48.9/55.4
50/60**
62.0/70.4
70/80
76.3/86.9
80/90
15.2
20**
15.2
20**
20.5
25**
24.3
25**
37.8
40**
41.6
45**
12.2
15**
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
25/25
25/27
33/37
42/47 101/101
49/55
60/68
18/18
18/18
21/24
90/90
26/30
31/35
44/50
9
11
15
46
18
22
7
36
34/ 34
34/ 34
42/ 47
60/ 68 142/142
78/ 89
93/106
22/22
22/24
26/30 112/112
44/50
56/64
12
12
18
57
22
34
9
45
45/ 45
45/ 45
46/ 52
216/216
64/ 72
82/ 93
97/111
28/28
28/28
32/36
168/168
45/51
57/65
70/80
14
14
19
84
22
35
38
11
67
32/32
32/32
32/36
45/51 200/200
57/65
70/80
15
15
19
92
22
35
38
13
78
ELECTRICAL DATA (cont)
STANDARD MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET (cont)
UNIT
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE COMPRESSOR OFM IFM
RANGE
(each)
(each)
Min Max
RLA
LRA
FLA
208/230-3-60 187 254
12.4
88.0
1.4
551B090††
(71/2 Tons)
460-3-60
414 508
6.4
44.0
0.7
575-3-60
518 632
4.8
34.0
0.7
208/230-3-60 187 254
15.0
99.0
1.4
551B102††
(81/2 Tons)
551B120††
(10 Tons)
551B150††
(121/2 Tons)
460-3-60
414 508
8.2
49.5
0.7
575-3-60
518 632
5.8
40.0
0.7
208/230-3-60 187 254
17.3
123.0
1.4
460-3-60
414 508
9.0
62.0
0.7
575-3-60
518 632
7.1
50.0
0.7
208/230-3-60 187 254
19.0
156.0
1.4
460-3-60
414 508
9.0
70.0
0.7
575-3-60
518 632
7.4
54.0
0.7
ELECTRIC HEAT
POWER SUPPLY
FLA Nominal kW†
FLA
MCA
MOCP
—
—
38.2/ 38.2
45/ 45**
7.8/10.5
21.7/ 25.0
38.2/ 40.6
45/ 45**
12.0/16.0
33.3/ 38.5
51.1/ 57.5
60/ 60**
7.5
18.6/24.8
51.6/ 57.7
74.0/ 84.0
80/ 90
24.0/32.0
66.7/ 77.0
92.8/105.6 100/110
31.8/42.4
88.5/102.0 119.9/136.9 125/150
—
—
19.2
25**
14.0
16.7
25.1
30**
16.5
19.8
29.1
30**
3.4
27.8
33.4
46.0
50**
33.0
39.7
53.9
60**
41.7
50.2
66.9
70
—
—
14.6
20**
3.4
17.0
17.1
24.7
25**
34.0
34.1
46.1
50**
—
—
44.1/ 44.1
50/ 50**
7.8/10.5
21.7/ 25.0
44.1/ 44.1
50/ 50**
12.0/16.0
33.3/ 38.5
51.1/ 57.5
60/ 60**
7.5
18.6/24.8
51.6/ 59.7
74.0/ 84.0
80/ 90
24.0/32.0
66.6/ 77.0
92.8/105.6 100/110
31.8/42.4
88.3/102.0 119.9/136.9 125/150
—
—
23.3
30**
14.0
16.7
25.1
30**
16.5
19.8
29.1
30**
3.4
27.8
33.4
46.0
50**
33.0
39.7
53.9
60**
41.7
50.2
66.9
70
—
—
16.9
20**
3.4
17.0
17.1
24.7
25**
34.0
34.1
46.1
50**
—
—
52.3/ 52.3
60/ 60**
7.8/10.5
21.7/ 25.0 52.3/ 52.3
60/ 60**
12.0/16.0
33.3/ 38.5 54.9/ 61.4
70/ 70
10.6
24.0/32.0
66.6/ 77.0 96.6/109.5 100/110
31.8/42.4
88.4/102.0 123.7/140.8 125/150
37.5/50.0
104.4/120.3 143.5/133.5 150/150
—
—
26.5
30**
16.5
19.8
30.8
35**
27.8
33.4
47.8
50**
4.8
33.0
39.7
55.6
60**
41.7
50.2
68.7
70
50.0
60.1
66.1
70
—
—
20.9
25**
17.0
17.1
26.1
30**
4.8
34.0
34.1
47.5
50**
51.0
51.2
56.0
60**
70/ 70
60.6/ 60.6
—
—
70/ 70
21.7/ 25.0 60.6/ 60.6
7.8/10.5
90/ 90
33.3/ 38.5 60.6/ 66.9
12.0/16.0
15.0
66.6/ 77.0 102.1/115.0 110/125
24.0/32.0
88.3/102.0 129.2/146.3 150/150
31.8/42.4
104.4/120.3 149.0/139.0 150/150
37.5/50.0
—
—
29.1
35**
16.5
19.8
34.1
40**
27.8
33.4
51.0
60**
7.4
33.0
39.7
58.9
60**
41.7
50.2
71.9
80
50.0
60.1
69.4
80
—
—
23.7
30**
17.0
17.1
28.7
35**
7.4
34.0
34.1
50.1
60**
51.0
51.2
58.6
70
NOTE: See legend and notes on page 46.
48
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
40/ 40
40/ 40
47/ 53
68/ 77 242/242
85/ 97
110/126
20
23
27
121
42
50
62
15
23
95
42
46/ 46
46/ 46
47/ 53 264/264
68/ 77
85/ 97
110/126
24
24
27
132
42
50
62
18
23
107
42
55/ 55
55/ 55
55/ 56
89/101 337/337
114/129
132/151
28
28
44
170
51
63
75
22
24
136
44
63
64/ 64
64/ 64
64/ 64
94/106 426/426
119/135
137/156
31
31
47
197
54
66
78
25
26
154
46
66
ELECTRICAL DATA (cont)
STANDARD MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET
UNIT
551B036
(3 Tons)
551B048
(4 Tons)
551B060
(5 Tons)
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM
IFM
Min
Max
RLA
LRA
FLA
FLA
208/230-1-60
187
254
16.0
88.0
0.7
4.9
208/230-3-60
187
254
10.3
77.0
0.7
4.9
460-3-60
414
508
5.1
39.0
0.4
2.2
575-3-60
518
632
4.2
31.0
0.4
2.2
208/230-1-60
187
254
23.7
129.0
0.7
4.9
208/230-3-60
187
254
13.5
99.0
0.7
4.9
460-3-60
414
508
7.4
49.5
0.4
2.2
575-3-60
518
632
5.8
40.0
0.4
2.2
208/230-1-60
187
254
28.8
169.0
1.5
8.8
208/230-3-60
187
254
17.3
123.0
1.5
5.8
460-3-60
414
508
9.0
62.0
0.8
2.6
575-3-60
518
632
7.1
50.0
0.8
2.6
208/230-3-60
187
254
20.5
156.0
1.4
5.8
460-3-60
414
508
9.6
70.0
0.6
2.6
575-3-60
518
632
7.7
56.0
0.6
2.6
551B072
(6 Tons)
ELECTRIC HEAT
Nominal kW†
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
8.7/13.0
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
12.0/16.0
—
6.0
8.8
11.5
14.0
—
—
3.3/ 4.4
4.9/ 6.5
8.7/13.0
13.0/17.4
15.8/21.0
—
4.9/ 6.5
6.5/ 8.7
12.0/16.0
15.8/21.0
—
6.0
11.5
14.0
23.0
—
—
4.9/ 6.5
6.5/ 8.7
8.7/13.0
13.0/17.4
15.8/21.0
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
NOTE: See legend and notes on page 46.
49
FLA
—
15.9/18.3
23.5/27.1
31.4/36.3
37.9/43.1
46.9/54.2
—
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.5/38.6
—
7.2
10.6
13.8
16.8
—
—
15.9/18.3
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
—
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
—
7.2
13.8
16.6
27.7
—
—
23.5/27.1
31.4/36.3
46.9/54.2
62.8/72.5
75.8/87.5
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.1
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.7
—
POWER SUPPLY
MCA
31.6/31.6
31.6/34.0
40.5/45.0
50.4/56.4
58.5/65.0
69.8/78.8
24.5/24.5
24.5/24.5
28.1/30.7
33.8/37.3
38.5/42.7
52.8/59.2
11.7
14.4
18.7
22.7
26.5
9.5
41.2/ 41.2
41.2/ 41.2
50.4/ 56.4
69.8/ 78.8
89.7/101.8
105.9/120.5
28.5/28.5
28.5/30.7
33.8/37.3
52.8/59.2
65.8/74.3
14.6
15.1
22.7
26.5
40.0
11.5
52.3/ 52.3
52.3/ 52.3
55.3/ 61.3
74.7/ 83.7
94.5/106.6
110.8/125.4
34.9/34.9
34.9/34.9
39.6/43.8
53.9/60.4
67.0/75.4
81.3/91.9
17.4
17.4
23.2
27.0
40.5
43.5
13.8
38.8/38.8
38.8/38.8
39.6/43.8
53.9/60.4
67.0/75.4
81.3/91.9
17.9
17.9
23.2
27.0
40.5
44.3
14.3
MOCP
40/40**
40/40**
45/45**
60/60**
60/70
70/80
30/30**
30/30**
30/35**
35/40**
40/45**
60/60**
15**
15**
20**
25**
30**
15**
50/ 50**
50/ 50**
60/ 60**
80/ 90
100/110
110/125
35/35**
35/35**
35/40**
60/60**
70/80
20**
20**
25**
30**
45**
15**
60/ 60**
60/ 60**
60/ 70
80/ 90
100/110
125/150
40/ 40**
40/ 40**
40/ 45**
60/ 70
70/ 80
90/100
20**
20**
25**
30**
45**
45**
20**
45/ 45**
45/ 45**
45/ 45**
60/ 70
70/ 80
90/100
20**
20**
25**
30**
45**
45**
20**
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
30/30
30/32
38/42
47/53 106/106
55/61
65/73
24/24
24/24
27/29
95/95
32/35
36/40
50/55
11
13
17
48
21
24
9
38
39/ 39
39/ 39
47/ 53
65/ 73 147/147
83/ 95
98/112
27/27
27/29
32/35 117/117
50/55
62/69
14
14
21
59
24
37
11
47
50/ 50
50/ 50
52/ 57
221/221
70/ 78
88/ 99
103/116
34/34
34/34
37/41
173/173
51/56
63/70
76/86
17
17
21
87
25
37
40
13
69
37/37
37/37
37/41
205
51/56
63/70
76/86
17
17
21
94
25
37
41
15
79
ELECTRICAL DATA (cont)
STANDARD MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET (cont)
UNIT
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR OFM IFM
(each)
(each)
ELECTRIC HEAT
Min
Max
RLA
LRA
FLA
FLA
208/230-3-60 187
254
12.4
88.0
1.4
7.5
551B090††
(71/2 Tons)
460-3-60
414
508
6.4
44.0
0.7
3.4
575-3-60
518
632
4.8
34.0
0.7
3.4
208/230-3-60 187
254
15.0
99.0
1.4
7.5
551B102††
(81/2 Tons)
551B120††
(10 Tons)
551B150††
(121/2 Tons)
460-3-60
414
508
8.2
49.5
0.7
3.4
575-3-60
518
632
5.8
40.0
0.7
3.4
208/230-3-60 187
254
17.3
123.0
1.4
10.6
460-3-60
414
508
9.0
62.0
0.7
4.8
575-3-60
518
632
7.1
50.0
0.7
4.8
208/230-3-60 187
254
19.0
156.0
1.4
15.0
460-3-60
414
508
9.0
70.0
0.7
7.4
575-3-60
518
632
7.4
54.0
0.7
7.4
POWER SUPPLY
Nominal kW†
FLA
MCA
MOCP
—
—
44.2/ 44.2 50/ 50**
7.8/10.5
21.7/ 25.0
44.2/ 45.6 50/ 50**
12.0/16.0
33.3/ 38.5
56.1/ 62.5 60/ 70
18.6/24.8
51.6/ 57.7
79.0/ 89.0 80/ 90
24.0/32.0
66.7/ 77.0
97.8/110.6 100/125
31.8/42.4
88.5/102.0 124.9/141.9 125/150
—
—
21.9
25**
14.0
16.7
27.8
30**
16.5
19.8
31.8
35**
27.8
33.4
48.7
50**
33.0
39.7
56.6
60**
41.7
50.2
69.6
70
—
—
16.8
20**
17.0
17.1
27.4
30**
34.0
34.1
48.8
50**
—
—
50.1/ 50.1 60/ 60**
7.8/10.5
21.7/ 25.0
50.1/ 50.1 60/ 60**
12.0/16.0
33.3/ 38.5
56.1/ 62.5 60/ 70**
18.6/24.8
51.6/ 59.7
79.0/ 89.0 80/ 90
24.0/32.0
66.6/ 77.0
97.8/110.6 100/125
31.8/42.4
88.3/102.0 124.9/141.9 125/150
—
—
26.0
30**
14.0
16.7
28.5
30**
16.5
19.8
31.8
35**
27.8
33.4
48.7
50**
33.0
39.7
56.6
60**
41.7
50.2
69.6
70
—
—
19.1
25**
17.0
17.1
28.1
30**
34.0
34.1
48.8
50**
—
—
58.3/ 58.3 70/ 70
7.8/10.5
21.7/ 25.0 58.3/ 58.3 70/ 70
12.0/16.0
33.3/ 38.5 59.9/ 66.4 70/ 70
24.0/32.0
66.6/ 77.0 101.6/114.5 110/125
31.8/42.4
88.4/102.0 128.7/145.8 150/150
37.5/50.0
104.4/120.3 148.5/138.5 150/150
—
—
29.2
35**
16.5
19.8
33.6
35**
27.8
33.4
50.5
60**
33.0
39.7
58.4
60**
41.7
50.2
71.4
80
50.0
60.1
68.9
80
—
—
23.1
25**
17.0
17.1
28.9
30**
34.0
34.1
50.2
60**
51.0
51.2
58.8
70
66.6/ 66.6 70/ 70
—
—
21.7/ 25.0 66.6/ 66.6 70/ 70
7.8/10.5
33.3/ 38.5 66.6/ 71.9 70/ 80
12.0/16.0
66.6/ 77.0 107.1/120.0 110/125
24.0/32.0
88.3/102.0 134.2/151.3 150/175
31.8/42.4
104.4/120.3 155.3/144.0 175/150
37.5/50.0
—
—
31.8
35**
16.5
19.8
37.4
40**
27.8
33.4
53.8
60**
33.0
39.7
61.6
70
41.7
50.2
74.7
80
50.0
60.1
71.6
80
—
—
25.9
30**
17.0
17.1
31.5
35**
34.0
34.1
52.8
60**
51.0
51.2
60.8
70
NOTE: See legend and notes on page 46.
50
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
46/ 46
46/ 46
53/ 58
74/ 83 246/246
91/103
116/131
23
26
29
124
45
52
64
17
25
97
44
52/ 52
52/ 52
53/ 58 268/268
74/ 83
91/103
116/131
27
27
29
135
45
52
64
20
25
109
44
61/ 61
61/ 61
61/ 62
94/106 341/341
119/135
138/156
30
31
46
172
54
66
77
24
26
139
46
65
70/ 70
70/ 70
70/ 70
99/111 430/430
124/140
143/161
33
34
49
200
57
69
80
27
28
156
48
68
ELECTRICAL DATA (cont)
HIGH-STATIC MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET
UNIT
551B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
Min
COMPRESSOR
(each)
Max
RLA
LRA
OFM
IFM
FLA
FLA
208/230-3-60
187
254
10.3
77.0
0.7
5.8
460-3-60
414
508
5.1
39.0
0.4
2.6
575-3-60
518
632
4.2
31.0
0.4
2.6
208/230-3-60
187
254
13.5
99.0
0.7
5.8
460-3-60
414
508
7.4
49.5
0.4
2.6
575-3-60
518
632
5.8
40.0
0.4
2.6
208/230-3-60
187
254
17.3
123.0
1.5
7.5
460-3-60
414
508
9.0
62.0
0.8
3.4
575-3-60
518
632
7.1
50.0
0.8
3.4
208/230-3-60
187
254
20.5
156.0
1.4
7.5
460-3-60
414
508
9.6
70.0
0.6
3.4
575-3-60
518
632
7.7
56.0
0.6
3.4
ELECTRIC HEAT
Nominal
kW†
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
12.0/16.0
—
6.0
8.8
11.5
14.0
—
—
4.9/ 6.5
6.5/ 8.7
12.0/16.0
15.8/21.0
—
6.0
11.5
14.0
23.0
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
036
048
060
072
NOTE: See legend and notes on page 46.
51
POWER SUPPLY
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
MCA
MOCP
FLA
—
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
—
7.2
10.6
13.8
16.8
—
—
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
—
7.2
13.8
16.8
27.7
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.1
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.7
—
19.4/19.4
19.4/20.5
24.2/26.8
29.9/33.4
34.6/38.8
48.9/55.4
9.4
12.3
16.5
20.5
24.3
7.7
23.4/23.4
24.2/26.8
29.9/33.4
48.9/55.4
62.0/70.4
12.3
12.3
20.5
24.3
37.8
9.7
30.6/30.6
30.6/30.6
36.7/40.9
51.1/57.5
64.1/72.5
78.4/89.1
15.5
15.5
21.5
25.3
38.8
41.8
12.2
30.6/30.6
34.5/34.5
36.7/40.9
51.1/57.5
64.1/72.5
78.4/89.1
15.5
16.0
21.5
25.3
38.8
42.6
12.2
25/25
25/25
30/30
35/35
35/40
50/60
15
15
20
25
25
15
30/30
30/30
35/35
50/60
70/80**
15
15
25
25
40
15
35/35
35/35
40/45
60/60
70/80**
80/90**
20
20
25
30
40
45
15
35/35
40/40
45/45
60/60
70/80**
80/90**
20
20
25
30
40
45
15
19/19
19/19
22/25
28/31
32/36
45/51
9
11
15
19
22
8
23/23
23/25
28/31
45/51
57/65
12
12
19
22
35
9
30/30
30/30
34/38
47/53
59/67
72/82
15
15
20
23
36
38
12
30/30
34/34
34/38
47/53
59/67
72/82
15
16
20
23
36
39
12
LRA
120/120
60
52
142/142
70
57
187/187
93
75
219/219
101
76
ELECTRICAL DATA (cont)
HIGH-STATIC MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET (cont)
UNIT
551B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
Min
208/230-3-60 187
Max
COMPRESSOR OFM
(each)
(each)
RLA
LRA
FLA
IFM
FLA
254
12.4
88.0
1.4
10.6
090††
460-3-60
414
508
6.4
44.0
0.7
4.8
575-3-60
518
632
4.8
34.0
0.7
4.8
208/230-3-60 187
254
15.0
99.0
1.4
10.6
102††
460-3-60
414
508
8.2
49.5
0.7
4.8
575-3-60
518
632
5.8
40.0
0.7
4.8
208/230-3-60 187
254
17.3
125.0
1.4
15.0
120††
460-3-60
414
508
9.0
62.0
0.7
7.4
575-3-60
518
632
7.1
50.0
0.7
7.4
NOTE: See legend and notes on page 46.
52
ELECTRIC HEAT
Nominal
kW†
—
7.8/10.5
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
14.0
16.5
27.8
33.0
41.7
—
17.0
34.0
—
7.8/10.5
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
14.0
16.5
27.8
33.0
41.7
—
17.0
34.0
—
7.8/10.5
12.0/16.0
24.0/32.0
31.8/42.4
37.5/50.0
—
16.5
27.8
33.0
41.7
50.0
—
17.0
34.0
51.0
POWER SUPPLY
FLA
MCA
MOCP
—
21.7/ 25.0
33.4/ 38.5
51.7/ 59.7
66.7/ 77.0
88.4/102.0
—
16.7
19.8
33.4
39.7
50.2
—
17.1
34.1
—
21.7/ 25.0
33.4/ 38.5
51.7/ 59.7
66.7/ 77.0
88.4/102.0
—
16.7
19.8
33.4
39.7
50.2
—
17.1
34.1
—
21.7/ 25.0
33.4/ 38.5
66.7/ 77.0
88.4/102.0
104.2/120.3
—
19.8
33.4
39.7
50.2
60.1
—
17.1
34.1
51.2
41.3/ 41.3
41.3/ 44.5
54.9/ 61.4
77.9/ 87.8
96.6/109.5
123.7/140.8
20.6
26.9
30.8
47.8
55.6
68.7
15.8
27.4
48.6
47.2/ 47.2
47.2/ 47.2
54.9/ 61.4
77.9/ 87.8
96.6/109.5
123.7/140.8
24.7
26.9
30.8
47.8
55.6
67.0
18.1
26.1
47.5
56.7/ 56.7
57.4/ 57.4
60.4/ 66.9
102.1/115.0
129.2/146.3
149.0/139.0
29.1
34.1
51.0
58.9
71.9
84.4
23.0
28.7
50.1
58.6
45/ 45
50/ 50
60/ 70**
80/ 90**
100/110**
125/150**
25
30
35
50
60
70**
20
30
50
60/ 60
60/ 60
60/ 70
80/ 90
100/110
125/150
30
30
35
50
60
70
20
30
50
70/ 70**
70/ 70**
70/ 80**
110/125**
150/150**
150/150**
35
40
60**
60**
70**
80**
25
35
60
70**
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
44/ 44
44/ 44
44/ 44
51/ 56 270/270
89/101
114/129
22
25
28
134
44
51
63
17
25
97
45
50/ 50
50/ 50
50/ 50
51/ 56 286/286
89/101
114/129
26
26
28
145
28
51
63
19
24
116
44
61/ 61
61/ 61
61/ 62
94/106 361/361
119/135
137/156
29
31
47
181
54
66
78
23
26
144
46
66
ELECTRICAL DATA (cont)
HIGH-STATIC MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET
UNIT
551B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
Min
COMPRESSOR
Max
RLA
LRA
OFM
IFM
FLA
FLA
208/230-3-60
187
254
10.3
77.0
0.7
5.8
460-3-60
414
508
5.1
39.0
0.4
2.6
575-3-60
518
632
4.2
31.0
0.4
2.6
208/230-3-60
187
254
13.5
99.0
0.7
5.8
460-3-60
414
508
7.4
49.5
0.4
2.6
575-3-60
518
632
5.8
40.0
0.4
2.6
208/230-3-60
187
254
17.3
123.0
1.5
7.5
460-3-60
414
508
9.0
62.0
0.8
3.4
575-3-60
518
632
7.1
50.0
0.8
3.4
208/230-3-60
187
254
20.5
156.0
1.4
7.5
ELECTRIC HEAT
Nominal
kW†
—
3.3/ 4.4
4.9/ 6.5
6.5/ 8.7
7.9/10.5
12.0/16.0
—
6.0
8.8
11.5
14.0
—
—
4.9/ 6.5
6.5/ 8.7
12.0/16.0
15.8/21.0
—
6.0
11.5
14.0
23.0
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
—
4.9/ 6.5
7.9/10.5
12.0/16.0
15.8/21.0
19.9/26.5
—
6.0
11.5
14.0
23.0
25.5
—
036
048
060
072
460-3-60
414
508
9.6
70.0
0.6
3.4
575-3-60
518
632
7.7
56.0
0.6
3.4
NOTE: See legend and notes on page 46.
53
POWER SUPPLY
FLA
MCA
—
9.2/10.6
13.6/15.6
18.1/20.9
21.9/25.3
33.4/38.5
—
6.0
8.8
13.8
16.8
—
—
13.6/15.6
18.1/20.9
33.4/38.5
43.8/50.5
—
7.2
13.8
16.8
27.7
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.1
—
—
13.6/15.6
21.9/25.3
33.4/38.5
43.8/50.5
55.2/63.8
—
7.2
13.8
16.8
27.7
30.7
—
25.4/25.4
25.4/25.5
29.2/31.8
34.9/38.4
39.6/43.8
53.9/60.4
12.1
14.9
19.2
23.2
27.0
9.8
29.4/29.4
29.4/31.8
34.9/38.4
53.9/60.4
67.0/75.4
15.0
15.6
23.2
27.0
40.5
11.8
36.6/36.6
36.6/36.6
41.7/45.9
56.1/62.5
69.1/77.5
83.4/94.1
18.2
18.2
24.2
28.0
41.5
44.5
14.4
40.5/40.5
40.5/40.5
41.7/45.9
56.1/62.5
69.1/77.5
83.4/94.1
18.7
18.7
24.2
28.0
41.5
45.3
15.0
MINIMUM UNIT
DISCONNECT
SIZE*
MOCP
FLA
LRA
30/30
30/30
35/35
40/40
40/45
60/70**
15
20
20
25
30
15
35/35
35/35
40/40
60/70**
70/80**
20
20
25
30
45
15
40/ 40
40/ 40
40/ 50
60/ 70**
70/ 80**
90/100**
20
20
25
30
45
45
20
45/ 45
45/ 45
45/ 50
60/ 70**
70/ 80**
90/100**
25
25
25
30
45
50
20
25/25
25/25
28/30
33/36
37/41
51/56
12
14
18
21
25
11
29/29
29/30
33/36
51/56
63/70
14
14
21
25
37
11
36/36
36/36
39/43
53/58
65/72
78/87
18
18
22
26
38
41
14
39/39
39/39
39/43
53/58
65/72
78/87
18
18
22
26
38
42
15
120/120
124/124
124/124
124/124
124/124
124/124
60
63
63
63
63
52
146/146
73
58
192/192
96
77
224/224
103
104
104
104
104
104
89
ELECTRICAL DATA (cont)
HIGH-STATIC MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET (cont)
UNIT
551B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
Min
208/230-3-60 187
Max
COMPRESSOR OFM
(each)
(each)
RLA
LRA
FLA
IFM
FLA
254
12.4
88.0
1.4
10.6
090††
460-3-60
414
508
6.4
44.0
0.7
4.8
575-3-60
518
632
4.8
34.0
0.7
4.8
208/230-3-60 187
254
15.0
99.0
1.4
10.6
102††
460-3-60
414
508
8.2
49.5
0.7
4.8
575-3-60
518
632
5.8
40.0
0.7
4.8
208/230-3-60 187
254
17.3
125.0
1.4
15.0
120††
460-3-60
414
508
9.0
62.0
0.7
7.4
575-3-60
518
632
7.1
50.0
0.7
7.4
NOTE: See legend and notes on page 46.
54
ELECTRIC HEAT
Nominal
kW†
—
7.8/10.5
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
14.0
16.5
27.8
33.0
41.7
—
17.0
34.0
—
7.8/10.5
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
14.0
16.5
27.8
33.0
41.7
—
17.0
34.0
—
7.8/10.5
12.0/16.0
24.0/32.0
31.8/42.4
37.5/50.0
—
16.5
27.8
33.0
41.7
50.0
—
17.0
34.0
51.0
POWER SUPPLY
FLA
MCA
MOCP
—
21.7/ 25.0
33.4/ 38.5
51.7/ 59.7
66.7/ 77.0
88.4/102.0
—
16.7
19.8
33.4
39.7
50.2
—
17.1
34.1
—
21.7/ 25.0
33.4/ 38.5
51.7/ 59.7
66.7/ 77.0
88.4/102.0
—
16.7
19.8
33.4
39.7
50.2
—
17.1
34.1
—
21.7/ 25.0
33.4/ 38.5
66.7/ 77.0
88.4/102.0
104.2/120.3
—
19.8
33.4
39.7
50.2
60.1
—
17.1
34.1
51.2
47.3/ 47.3
47.3/ 50.0
59.9/ 66.4
82.9/ 92.8
101.6/114.5
128.7/145.8
23.3
29.5
33.5
50.4
58.3
71.3
18.5
27.4
48.6
53.2/ 53.2
53.2/ 53.2
59.9/ 66.4
82.9/ 92.8
101.6/114.5
128.7/145.8
27.4
29.5
33.4
50.4
58.3
67.0
20.7
28.8
50.1
62.7/ 62.7
63.4/ 63.4
65.4/ 71.9
107.1/120.0
134.2/151.3
149.0/144.0
31.8
36.8
53.8
61.6
74.7
84.4
25.7
31.4
52.7
61.1
50/ 50
60/ 60
70/ 70
90/100**
110/125**
150/150**
25
30
35
60
60
80
20
30
50
60/ 60
60/ 60
70/ 70
90/100
110/125
150/150
30
30
35
60
60
80
25
30
60
70/ 70**
70/ 70**
70/ 80**
110/125**
150/175**
175/150**
35
40
60**
70**
70**
80**
30
35
60
70*
MINIMUM UNIT
DISCONNECT
SIZE*
FLA
LRA
49/ 49
49/ 49
56/ 62
77/ 86 270/270
94/106
119/135
24
134
27
136
31
136
46
136
54
136
66
136
20
119
25
119
45
119
55/ 55
55/ 55
56/ 62
290
77/ 86
94/106
119/135
28
28
31
132
46
54
66
21
26
119
46
66/ 66
66/ 66
66/ 67
99/111 365/365
124/140
143/161
32
34
49
181
57
69
80
25
28
147
48
68
TYPICAL PIPING AND WIRING
Vertical Discharge Ducting
LEGEND
NEC — National Electrical Code
*Factory-supplied, internally mounted disconnect available
as an option.
Horizontal Discharge Ducting
55
CONTROLS
modulating the return and outdoor air dampers to maintain a
55 F supply air set point. If the supply-air temperature (SAT) is
greater than 57 F, the EconoMi$er modulates open, allowing a
greater amount of outdoor air to enter the unit. If the SAT drops
below 53 F, the outdoor air damper modulates closed to reduce
the amount of outdoor air. When the SAT is between 53 and
57 F, the EconoMi$er maintains its position.
If outdoor air alone cannot satisfy the cooling requirements of
the conditioned space, and the OAT is above the MECH CLG
LOCKOUT set point, the EconoMi$er integrates free cooling
with mechanical cooling. This is accomplished by the strategies
below.
NOTE: Compressor has a 2-minute Minimum On, Minimum Off,
and Interstage delay timer.
1. If Y1 is energized, and the room thermostat calls for Y2
(2-stage thermostat), the compressor and OFM are energized. The position of the EconoMi$er damper is maintained at its current value.
2. If Y1 is energized for more than 20 minutes, and Y2 is not
energized (whether or not a 2-stage thermostat is used),
the compressor and OFM are energized. The position of the
EconoMi$er damper is maintained at its current value.
3. If Y1 is energized, and the compressor is already energized
(see Step 2) and the room thermostat calls for Y2, the compressor continues to operate.
4. If the compressor is energized and the thermostat is satisfied, the compressor, the OFM, and IFM are deenergized
and the EconoMi$er modulates closed.
When the OAT is below the MECH CLG LOCKOUT set point,
the compressors remain off.
Heating, Units Without Economizer — Upon a call for heating
through W1, indoor (evaporator) fan contactor (IFC) and heater
contactor no. 1 (HC1) are energized. On units equipped for
2 stages of heat, when additional heat is needed, heater contactor no. 2 is energized through W2.
Heating, Units With Economizer — When the room temperature calls for heat through terminal W1, the indoor (evaporator)
fan contactor (IFC) and heater contactor no. 1 (HC1) are energized. On units equipped for 2 stages of heat, when additional
heat is needed, heater contactor no. 2 is energized through W2.
The economizer damper moves to the minimum position. When
the thermostat is satisfied, the damper moves to the fully closed
position.
OPERATING SEQUENCE — 551B090-150 UNITS
Cooling, Units Without Economizer — When the thermostat
calls for cooling, terminals G and Y1 are energized. The indoor
(evaporator) fan contactor (IFC), compressor contactor no. 1
(C1) and outdoor fan contactor (OFC) are energized and the
indoor (evaporator) fan motor (IFM), compressor no. 1, and condenser fans start. The outdoor (condenser) fan motors (OFM)
run continuously while unit is cooling. If the thermostat calls for
a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is energized and compressor no. 2 starts.
Cooling, Units With Durablade Economizer — When the
outdoor-air temperature is above the outdoor-air temperature
(OAT) setting and the room thermostat calls for cooling, the
compressor contactor no. 1 is energized to start compressor
no. 1 and outdoor (condenser) fan motors (OFM). The indoor
(evaporator) fan motor (IFM) is energized and the economizer
damper moves to the minimum position. Upon a further call for
cooling, compressor contactor no. 2 will be energized, starting
compressor no. 2. After the thermostat is satisfied and the IFM
is deenergized, the damper moves to the fully closed position.
OPERATING SEQUENCE — 551B036-072 UNITS
Cooling, Units Without Economizer — When the thermostat
calls for cooling, terminals G and Y1 are energized. The indoor
(evaporator) fan contactor (IFC), and compressor contactor
no. 1 (C1) are energized and the indoor (evaporator) fan motor
(IFM), compressor no. 1, and condenser fan start. The outdoor
(condenser) fan motor (OFM) runs continuously while unit is
cooling.
Cooling, Units With Durablade Economizer — When the
outdoor-air temperature is above the outdoor-air temperature
(OAT) setting and the room thermostat calls for cooling, the
compressor contactor is energized to start the compressor and
outdoor (condenser) fan motor (OFM). The indoor (evaporator)
fan motor (IFM) is energized and the economizer damper
moves to the minimum position. After the thermostat is satisfied, the damper moves to the fully closed position when IFM is
deenergized.
When the outdoor-air temperature is below the OAT setting and
the thermostat calls for Y1 and G (cooling), the economizer
damper moves to the minimum position when the evaporator
fan starts. The first stage of cooling is provided by the economizer. If the supply-air temperature is above 57 F, a switch on
the supply-air thermostat is closed between the T2 terminal and
the 24 vac terminal. This causes the damper to continue to
modulate open until the supply-air temperature falls below 55 F
or the damper reaches the fully open position.
When the supply-air temperature is between 55 F and 52 F, the
supply-air thermostat has open switches between the T2 and
24 vac terminals and between the T1 and 24 vac terminals. This
causes the economizer damper to remain in an intermediate
open position.
If the supply-air temperature falls below 52 F, a switch on the
supply-air thermostat is closed between the T1 terminal and the
24 vac terminal. This causes the damper to modulate closed
until the supply-air temperature rises above 55 F or the damper
reaches the minimum position.
When the supply-air temperature is between 55 F and 57 F, the
supply-air thermostat has open switches between the T2 and
24 vac terminals. This causes the economizer damper to
remain in an intermediate open position.
If the outdoor air alone cannot satisfy the cooling requirements
of the conditioned space, economizer cooling is integrated with
mechanical cooling, providing second stage cooling. The compressor and condenser fan will be energized and the position of
the economizer damper will be determined by the supply-air
temperature.
When the second stage of cooling is satisfied, the compressor
and OFM will be deenergized. The damper position will be
determined by the supply-air temperature.
When the first stage of cooling is satisfied, there is a 30-second
delay before the evaporator fan shuts off on 048-060 units. The
damper will move to fully closed position.
Cooling, Units With EconoMi$er — When the outdoor-air
temperature (OAT) is above the ECON SP set point and the
room thermostat calls for Stage 1 cooling (R to G + Y1), the
indoor (evaporator) fan motor (IFM) is energized and the
EconoMi$er damper modulates to minimum position. The compressor contactor is energized to start the compressor and outdoor (condenser) fan motor (OFM). After the thermostat is
satisfied, the damper modulates to the fully closed position
when the IFM is deenergized.
When the OAT is below the ECON SP setting and the room
thermostat calls for Stage 1 cooling (R to G + Y1), the
EconoMi$er modulates to the minimum position when the IFM
is energized. The EconoMi$er provides Stage 1 of cooling by
56
CONTROLS (cont)
When the outdoor-air temperature is below the OAT setting and
the thermostat calls for Y1 and G (cooling), the economizer
damper moves to the minimum position when the evaporator
fan starts. The first stage of cooling is provided by the economizer. If the supply-air temperature is above 57 F, a switch on
the supply-air thermostat is closed between the T2 terminal and
the 24 vac terminal. This causes the damper to continue to
modulate open until the supply-air temperature falls below 55 F
or the damper reaches the fully open position.
When the supply-air temperature is between 55 F and 52 F, the
supply-air thermostat has open switches between the T2 and
24 vac terminals and between the T1 and 24 vac terminals. This
causes the economizer damper to remain in an intermediate
open position.
If the supply-air temperature falls below 52 F, a switch on the
supply-air thermostat is closed between the T1 terminal and the
24 vac terminal. This causes the damper to modulate closed
until the supply-air temperature rises above 55 F or the damper
reaches the minimum position.
When the supply-air temperature is between 55 F and 57 F, the
supply-air thermostat has open switches between the T2 and
24 vac terminals. This causes the economizer damper to
remain in an intermediate open position.
If the outdoor air alone cannot satisfy the cooling requirements
of the conditioned space, economizer cooling is integrated with
mechanical cooling, providing second stage cooling. Compressor no. 1 and condenser fans will be energized, and the position
of the economizer damper will be determined by the supply-air
temperature. Compressor no. 2 is locked out.
When the second stage of cooling is satisfied, the compressor
and OFMs will be deenergized. The damper position will be
determined by the supply-air temperature.
When the first stage of cooling is satisfied, the IFM shuts off and
the damper will move to fully closed position.
Cooling, Units With EconoMi$er — When the outdoor-air
temperature (OAT) is above the ECON SP set point and the
room thermostat calls for Stage 1 cooling (R to G + Y1), the
indoor (evaporator) fan motor (IFM) is energized and the
EconoMi$er damper modulates to minimum position. The compressor contactor is energized to start the compressor and outdoor (condenser) fan motor (OFM). After the thermostat is
satisfied, the damper modulates to the fully closed position
when the IFM is deenergized.
When the OAT is below the ECON SP setting and the room
thermostat calls for Stage 1 cooling (R to G + Y1), the
EconoMi$er modulates to the minimum position when the IFM
is energized. The EconoMi$er provides Stage 1 of cooling by
modulating the return and outdoor air dampers to maintain a
55 F supply air set point. If the supply-air temperature (SAT) is
greater than 57 F, the EconoMi$er modulates open, allowing a
greater amount of outdoor air to enter the unit. If the SAT drops
below 53 F, the outdoor air damper modulates closed to reduce
the amount of outdoor air. When the SAT is between 53 and
57 F, the EconoMi$er maintains its position.
If outdoor air alone cannot satisfy the cooling requirements of
the conditioned space, and the OAT is above the MECH CLG
LOCKOUT set point, the EconoMi$er integrates free cooling
with mechanical cooling. This is accomplished by the strategies
below.
NOTE: Compressor has a two-minute Minimum On, Minimum
Off, and Interstage delay timer.
1. If Y1 is energized, and the room thermostat calls for Y2
(2-stage thermostat), compressor no. 1 and OFM are energized. The position of the EconoMi$er damper is maintained at its current value.
2. If Y1 is energized for more than 20 minutes, and Y2 is not
energized (whether or not a 2-stage thermostat is used),
compressor no. 1 and OFM are energized. The position of
the EconoMi$er damper is maintained at its current value.
3. If Y1 is energized, and compressor no. 1 is already energized (see Step 2) and the room thermostat calls for Y2, the
compressor continues to operate. If Y2 remains energized
for more than 20 minutes, compressor no. 2 is energized.
NOTE: Compressor no. 2 cannot be energized unless there is a
signal for Y2 from the space thermostat.
4. If compressor no. 2 is energized, and the Y2 signal from the
thermostat is satisfied, compressors 1 and 2 are deenergized. Reasserting Y2 will start compressor no. 1 and (after
a 20-minute interstage delay) compressor no. 2.
5. If compressor no. 1 is energized and the thermostat is satisfied, compressor no. 1, the OFM, and IFM are deenergized
and the EconoMi$er modulates closed.
When the OAT is below the MECH CLG LOCKOUT set point,
the compressors remain off.
Heating, Units Without Economizer — Upon a call heating
through terminal W1, indoor (evaporator) fan contactor (IFC)
and heater contactor no. 1 (HC1) are energized. On units
equipped for 2 stages of heat, when additional heat is needed,
HC2 is energized through W2.
Heating, Units With Economizer — When the room thermostat calls for heat through terminal W1, the indoor (evaporator)
fan contactor (IFC) and heater contactor no. 1 (HC1) are energized. On units equipped for 2 stages of heat, when additional
heat is needed, HC2 is energized through W2. The economizer
damper moves to the minimum position. When the thermostat is
satisfied, the damper moves to the fully closed position.
OPERATING SEQUENCE — UNITS WITH PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE — When thermostat
calls for cooling, terminals G and Y1 and/or Y2 and the compressor contactor(s) C1 (and C2) are energized. The indoor
(evaporator) fan motor (IFM), compressor(s), and outdoor (condenser) fan motor(s) (OFM) start. The OFM(s) runs continuously while the unit is in cooling. As shipped from the factory,
dehumidification circuit is always energized. If Perfect Humidity
circuit modulation is desired, a field-installed, wall-mounted
humidistat or light commercial thermidistat is required.
If the Perfect Humidity humidistat is installed and calls for the Perfect Humidity subcooler coil to operate, the humidistat internal
switch closes. This energizes and closes the liquid line solenoid
valve coil(s) (LLSV) of the Perfect Humidity circuit, forcing the hot
liquid refrigerant of the liquid line to enter the subcooler coil (see
Dehumidification Option diagram on page 58). As the hot liquid
passes through the subcooler coil, it is exposed to the cold supply airflow coming off from the evaporator coil and the liquid is
further cooled to a temperature approaching the evaporator coil
leaving-air temperature. The state of the refrigerant leaving the
subcooler coil is a highly subcooled liquid refrigerant. The liquid
then enters a thermostatic expansion valve (TXV) where the liquid is dropped to a lower pressure. The TXV does not have a
pressure drop great enough to change the liquid to a 2-phase
fluid. The TXV can throttle the pressure drop of the liquid refrigerant and maintain proper conditions at the compressor suction
valve over a wide range of operating conditions. The liquid then
enters a second fixed restrictor expansion device for a second
pressure drop to a 2-phase fluid. The liquid proceeds to the evaporator coil at a temperature lower than normal cooling operation.
This lower temperature is what increases the latent capacity of
the rooftop. The 2-phase refrigerant passes through the evaporator and is changed into a vapor. The air passing over the evaporator coil will become colder than during normal operation as a
result of the colder refrigerant temperatures. However, as it
passes over the subcooler coil, the air will be warmed slightly.
57
CONTROLS (cont)
As the refrigerant leaves the evaporator, the refrigerant passes
a low-pressure switch in the suction line. This low-pressure
switch will de-activate the Perfect Humidity™ package when the
suction pressure reaches 60 psig. The low-pressure switch is
an added safety device to protect against evaporator coil
freeze-up. The low-pressure switch will only de-activate and
open the liquid line solenoid valve in the Perfect Humidity circuit.
The compressors will continue to run as long as there is a call
for cooling, regardless of the position of the low-pressure
switch. The solenoid valve and the Perfect Humidity package
will be re-activated only when the call for cooling has been
satisfied, the low-pressure switch has closed, and a new call for
cooling exists. The crankcase heaters on the scroll compressors provide additional protection for the compressors due to
the additional refrigerant charge in the subcooler.
When the humidistat is satisfied, the humidistat internal switch
opens, cutting power to and opening the LLSV. The refrigerant
is routed back through the evaporator and the subcooler coil is
removed from the refrigerant loop.
When the thermostat is satisfied, C1 (and C2) is deenergized
and the compressor(s) and OFM(s) shut off. After a 30-second
delay, the IFM shuts off. If the thermostat fan selector switch is
in the ON position, the IFM will run continuously.
Perfect Humidity Dehumidification Option
58
TYPICAL WIRING SCHEMATIC (SINGLE FAN UNITS)
59
TYPICAL WIRING SCHEMATIC (TWO-FAN UNITS)
60
TYPICAL WIRING SCHEMATIC (cont)
AHA
AWG
C
CAP
CB
CC
CLO
COMP
D
EC
ECON
EPS
—
—
—
—
—
—
—
—
—
—
—
—
EQUIP
ER
FPT
FSS
FU
GND
HC
HPS
IFC
IFM
IFR
LPS
LSM
MTR
OAT
OFC
OFM
OLR
P
PL
QT
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Adjustable Heat Anticipator
American Wire Gage
Contactor, Compressor
Capacitor
Circuit Breaker
Cooling Compensator
Compressor Lockout
Compressor Motor
Diode
Enthalpy Control
Economizer
Emergency Power Supply
(9-v Battery)
Equipment
Economizer Relay
Freeze Protection Thermostat
Filter Status Switch
Fuse
Ground
Heater Contactor
High-Pressure Switch
Indoor (Evaporator) Fan Contactor
Indoor (Evaporator) Fan Motor
Indoor (Evaporator) Fan Relay
Low-Pressure Switch
Limit Switch (Manual Reset)
Motor
Outdoor-Air Thermostat
Outdoor (Condenser) Fan Contactor
Outdoor (Condenser) Fan Motor
Overload Relay
Plug
Plug Assembly
Quadruple Terminal
R
SAT
SW1
SW2
SW3
SW4
TB
TC
TDR
TH
TRAN
—
—
—
—
—
—
—
—
—
—
—
NOTES:
1. If any of the original wire furnished must be replaced, it
must be replaced with type 90° C wire or its equivalent.
2. Three-phase motors are protected under primary
single-phasing conditions.
3. Thermostat: HH07AT170,172
Subbase: HH93AZ176,177,178, and 179
4. Single-Fan Units:
Set heat anticipator at .8 amp for first stage, and
.3 amp for second stage.
Two-Fan Units:
Set heat anticipator at 1 amp.
5. Use copper conductors only.
6. Single-Fan Units:
TRAN is wired for 230-v unit. If unit is to be run with
208-v power supply, disconnect BLK wire from 230-v
tap (ORN) and connect to 208-v tap (RED). Insulate
end of 230-v tap.
Two-Fan Units:
Use copper, copper-clad aluminum, or aluminum
conductors.
7. Single-Fan Units:
Use copper, copper-clad aluminum, or aluminum
conductors.
Two-Fan Units:
TRAN is wired for 230-v unit. If unit is to be run with
208-v power supply, disconnect BLK wire from 230-v
tap (ORN) and connect to 208-v tap (RED). Insulate
end of 230-v tap.
Relay
Supply-Air Thermostat
Switch Fully Open
Switch Fully Closed
Switch Minimum Vent Position
Switch Maximum Vent Position
Terminal Block
Thermostat-Cooling
Time-Delay Relay
Thermostat-Heating
Transformer
Field Splice
Marked Wire
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only.
Not to represent wiring.
APPLICATION DATA
1. CONDENSATE DRAIN PAN — A sloped condensate drain
pan is supplied on all units. The condensate drain pan must
be externally trapped. Condensate drains are located on
both the bottom and end of the unit. The bottom drain can
be used for thru-the-curb connections.
2. DUCTWORK — All ductwork must be attached to flanges. If
no flanges are present, they must be field supplied. Secure
vertical discharge ductwork to roof curb. For horizontal discharge applications, attach ductwork to flanges. Field supplied flanges can be attached to horizontal discharge
openings and all ductwork attached to flanges.
3. TO CONVERT FROM VERTICAL DISCHARGE TO HORIZONTAL DISCHARGE (DURABLADE ECONOMIZER
ONLY):
a. Remove economizer or two-position damper to gain
access to return duct opening.
b. Move the horizontal-discharge duct opening covers to
the vertical discharge openings.
c. Rotate economizer or two-position damper 90 degrees
(until the motor faces the condenser section).
d. Rotate the barometric relief damper 90 degrees.
e. Install block-off plate over the opening on the access
panel.
4. THRU-THE-BOTTOM SERVICE CONNECTIONS — Thruthe-bottom connections allow field power wires and control
wires to enter through the basepan.
5. THERMOSTAT — Use of 2-stage cooling thermostat is
recommended for all units equipped with economizer.
6. HEATING-TO-COOLING CHANGEOVER — All units are
automatic changeover from heating to cooling when automatic changeover thermostat and subbase are used.
7. AIRFLOW — Units are draw-thru on cooling and blow-thru
on heating.
8. MAXIMUM AIRFLOW — To minimize possibility of condensate blow-off from evaporator, airflow through units should
not exceed 500 cfm/ton.
9. MINIMUM AIRFLOW — Minimum airflow for cooling is
300 cfm/ton. For units with electric heating, required minimum cfm is 900 for 551B036; 1200 for 551B048; 1500 for
551B060; 1800 for 551B072; 2250 for 551B090; 2500 for
551B102; 3000 for 551B120; and 4000 for the 551B150,
with the following exceptions:
UNIT
551B
120
090-150
UNIT
VOLTAGE
208/230
208/230
460
575
HEATER
kW
42.4
50.0
50.0
17.0
34.0
UNIT
CONFIGURATION
Horizontal
Horizontal
Horizontal or Vertical
Horizontal or Vertical
REQUIRED
MINIMUM CFM
3200
3200
3200
2800
2350
10. MINIMUM AMBIENT OPERATING TEMPERATURE — Minimum operating temperature for size 036-150 standard units
is 25 F. With accessory Motormaster® or Motormaster IV
control, units can operate at outdoor temperatures down to
–20 F.
11. MAXIMUM OPERATING OUTDOOR-AIR TEMPERATURE
— Maximum outdoor-air operating temperature for cooling
is 125 F.
12. MOTOR DATA — Due to Bryant’s internal unit design (drawthru over the motor), air path, and specially designed
motors, the full horsepower (maximum continuous bhp)
listed in the Physical Data table and in each Fan Performance table can be utilized with extreme confidence.
Using Bryant motors to the values listed in the Physical
Data, Fan Performance, and Evaporator-Fan Motor Data
tables will not result in nuisance tripping or premature motor
failure. In addition, the unit warranty will not be affected.
61
APPLICATION DATA (cont)
13. PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE
— This option provides greater dehumidification by further
subcooling the hot liquid refrigerant leaving the condenser
coil. The Perfect Humidity package consists of a subcooling
coil located on the leaving-air side of the evaporator coil.
The location of the coil in the indoor airstream enhances the
latent capacity of the 551B rooftop units by up to 40%.
Many buildings suffer damage or have poor indoor-air quality due to overly humid conditions. Building humidity must
be controlled for the following reasons:
a. INDOOR-AIR QUALITY — Humidity is a major factor in
the growth and propagation of mold and mildew in a
building. The mold and mildew can spread quickly and
grow in carpets and ductwork and on walls, and often
causes cases of sick building syndrome. This syndrome
can lead to employee absenteeism due to illness, lower
worker productivity, and increased health care costs. The
American Society of Heating, Refrigeration, and Air
Conditioning Engineers (ASHRAE) recommends that
relative humidity levels in buildings be maintained below
70%.
b. COMFORT LEVELS — High humidity levels cause the
occupied space to become uncomfortable, because
humidity interferes with the body’s natural cooling process (evaporation at the skin surface).
c. HUMIDITY DAMAGE — Humidity causes property
damage, such as stained wallpaper and ceiling tiles.
Humidity can also damage books and artwork, and create strong odors in carpets. In addition, humidity can
contribute to unacceptable product quality in industrial
processes.
d. IMPROPER VENTILATION — Buildings in hot and
humid geographical areas cannot be properly ventilated
due to high humidity levels outdoors, resulting in poor
indoor-air quality.
e. EQUIPMENT INEFFICIENCY — Humidity can cause
inefficient operation of refrigerators and freezers.
f. INCREASED ENERGY COSTS — Because of high
humidity levels and less comfortable conditions, thermostat set points are lowered to force the HVAC (heating,
ventilation, and air conditioning) equipment to run longer
and work harder to lower the humidity levels. Also, in an
attempt to control humidity, system designers typically
oversize HVAC equipment and add reheat capability to
get the desired latent capacity. This results in higher initial equipment costs, as well as increased energy
expenses throughout the life of the unit.
Applications
There are many different rooftop unit applications that are
susceptible to problems caused by high humidity levels.
Some common applications include:
a. RESTAURANTS — The kitchen areas of restaurants
have many humidity-producing activities, such as dish
washing and cooking.
b. SUPERMARKETS — High humidity levels cause inefficiency in operation of refrigeration and freezer systems.
c. MUSEUMS AND LIBRARIES — Humidity can damage
books and artwork.
d. GYMNASIUMS, LOCKER ROOMS, AND HEALTH
CLUBS — Shower areas and human perspiration cause
uncomfortable occupied space conditions.
e. HOT AND HUMID CLIMATES — The southeastern
United States is a good example of this application. The
Perfect Humidity dehumidification package becomes
particularly useful when increased amounts of the hot
and humid outdoor air need to be brought into the building for proper ventilation.
14. PERFECT HUMIDITY DEHUMIDIFICATION PACKAGE
DESIGN EFFECTS — To fully understand the operation of
the Perfect Humidity dehumidification package, refer to the
pressure enthalpy curve, and analyze the Perfect Humidity
package effects on the refrigerant in the rooftop unit. The
pressure enthalpy curve shows the refrigerant cycle for a
551B rooftop unit.
Standard Unit Refrigerant Cycle
At point no. 1 in the pressure enthalpy curve, vapor leaving the
compressor at a high pressure and a high temperature enters
the condenser. The condenser removes heat from the refrigerant, lowers its temperature, and changes it to a liquid. At point
no. 2, the liquid leaves the condenser and enters a fixed expansion device that lowers the pressure of the refrigerant. At point
no. 3, the liquid enters the evaporator coil, where the refrigerant
increases in temperature and changes back to a vapor. At point
no. 4, the vapor leaves the evaporator and reenters the
compressor.
Refrigerant Cycle Using Perfect Humidity Dehumidification
Package
When a subcooler coil is added to the rooftop unit, the refrigerant is affected in such a way that the unit latent capacity is
increased. The refrigerant cycle follows the same path from
point no. 1 to point no. 2 as the standard refrigerant cycle without a subcooler (see the pressure enthalpy curve). However, at
point no. 2, the liquid refrigerant enters the subcooler coil where
the temperature is lowered further. At point no. 2A, this subcooled liquid enters the TXV, which drops the pressure of the
liquid. At point no. 2B, the liquid enters the fixed orifice metering
device. The refrigerant leaves this device as a saturated vapor
and enters the evaporator at point no. 2C. The improved refrigeration effect can now be seen between point no. 2C and point
no. 3. The increase in the total refrigeration effect is the additional enthalpy gained from point no. 2C to point no. 3. However,
the subcooler coil rejects this added refrigeration effect to the
air downstream of the evaporator coil, thus maximizing the overall latent effect. This improved latent effect is a direct result of
the addition of the Perfect Humidity subcooler coil to the refrigerant cycle.
Latent Capacity Effects
Refer to the psychrometric chart to see how the sensible heat
factor decreases when the optional Perfect Humidity dehumidification package is installed. This chart contains data for the
5-ton 551B unit operation, both with and without the Perfect
Humidity package, at 1750 cfm. Point no. 1 on the chart represents the return-air dry bulb (80 F) and wet bulb (67 F) conditions. Point no. 2 represents the supply-air conditions for a
standard 551B rooftop unit without the Perfect Humidity dehumidification package. Point no. 3 represents the supply-air conditions for a 551B rooftop unit with the Perfect Humidity
package. By connecting point no. 1 and point no. 2 on the chart
and finding the intersection on the sensible heat factor scale,
the sensible heat factor is 0.73. Connect point no. 1 and point
no. 3, and see that the sensible heat factor is 0.58. This is a
17.5% increase in latent capacity for the given conditions. This
increase in latent capacity allows the 551B rooftop units to
remove more moisture from the conditioned space; thus lowering the humidity levels.
Dehumidification Effects
Further evidence of dehumidification can be seen by analyzing
the pounds of water per pound of dry air found in the supply air.
At point no. 2 in the psychrometric chart, there are 65 grains
(0.0092 lb) of moisture per pound of dry air. At point no. 3, there
are 58 grains (0.0083 lb) of moisture per pound of dry air. This
is a 12.1% decrease in the amount of water in the supply air.
62
APPLICATION DATA (cont)
• At lower outdoor temperatures, rooftop units with dehumidification devices are subject to low suction pressure conditions.
The Perfect Humidity dehumidification package contains a
low-pressure switch that deactivates the Perfect Humidity
dehumidification package under low suction pressure conditions without deactivating the compressors.
• Improved humidity control allows increased outdoor-air ventilation in hot and humid geographical areas. Humidity control
also helps to improve the indoor-air quality of the building.
• The Perfect Humidity dehumidification package is factory
installed. There are no additional field installation costs. There
is also no need to purchase a roof curb from another manufacturer, as standard Bryant roof curbs will accommodate the
551B rooftop units which have the Perfect Humidity dehumidification package option installed.
• The Perfect Humidity dehumidification package is engineered
and manufactured by Bryant for Bryant rooftop units. All application support, service, and warranty issues can therefore be
handled through one company.
• The slightly lower sensible capacities obtained when using the
Perfect Humidity dehumidification package allow the unit to
operate for an extended period of time. The more the unit
operates, the more air is exposed to the subcooling coil. This
rooftop unit increased latent capacity results in lower relative
humidity levels in the occupied space.
• It is no longer necessary to oversize equipment and add
reheat devices to properly dehumidify your building. In a typical scenario, a building owner may need 39,000 Btuh of sensible capacity and 23,000 Btuh of latent capacity (62,000 total
Btuh). To accomplish this without the Perfect Humidity dehumidification package, a 71/2-ton unit with a reheat device
would be necessary to attain the higher latent capacity
required. This results in a large up-front expense to oversize
the equipment from a standard 5-ton to a 71/2-ton unit.
The building owner can now purchase a 5-ton unit with the
Perfect Humidity dehumidification package for a small additional up-front charge, and no reheat device will be necessary
to satisfy the cooling requirements. This reduces both installation costs and operating costs throughout the life of the
product.
15. PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE
OPERATING PERFORMANCE — Perfect Humidity dehumidification package operation does not affect the electrical
data. The electrical data remains the same either with or
without the Perfect Humidity package.
The operating and shipping weights will be slightly
increased with the addition of the Perfect Humidity subcooler. See the Physical Data table for added base unit
weight with this option.
Refer to cooling performance data, both with and without
the Perfect Humidity dehumidification package. Note the
greatly improved latent capacity with the Perfect Humidity
dehumidification package.
Static pressure is also slightly affected by the addition of the
Perfect Humidity dehumidification package. See Static
Pressure Drop table on page 43 when using this option.
16. PERFECT HUMIDITY DEHUMIDIFICATION PACKAGE
FEATURES AND BENEFITS
• The Perfect Humidity dehumidification package can improve
the humidity control of your rooftop equipment by up to 40%.
This greatly reduces the risk of sick building syndrome by
reducing biological growth in both ductwork and the rest of the
building.
• The Perfect Humidity dehumidification package improves
comfort levels in the building by better controlling the humidity.
This improved comfort level allows building tenants to raise
the cooling set point on the thermostats for accumulated
energy savings.
• Better humidity control lowers the risk of humidity-induced
property damage.
• The Perfect Humidity dehumidification package permits building refrigerators and freezers to operate more efficiently due
to lower relative humidity levels. This is the perfect solution for
supermarket applications.
• The Perfect Humidity subcooling circuit can be operated by a
humidity sensor. If the sensor is used, the Perfect Humidity
circuit will then only operate when needed. If the humidity levels in the occupied space are acceptable (such as in the
spring and fall seasons), the Perfect Humidity circuit will not
operate. The rooftop unit is then able to operate to its full sensible potential, which provides more efficient performance and
energy savings.
63
64
Pressure Enthalpy Curve
NOTE: Numbers 1 through 4 indicate point numbers referred to in Perfect Humidity™ Dehumidification Package Design Effects section.
APPLICATION DATA (cont)
LEGEND
db — Dry Bulb
wb — Wet Bulb
Point 1 — Entering Air (F) 80 db/67 wb
Point 2 — Leaving Air (F) 58.9 db/56.4 wb
(Without Subcooler)
Point 3 — Leaving Air (F) 63.0 db/56.8 wb
(With Subcooler)
Psychrometric Chart (551B072 Shown)
APPLICATION DATA (cont)
65
GUIDE SPECIFICATIONS
PACKAGED ROOFTOP COOLING UNIT WITH ELECTRIC
HEAT OPTION — CONSTANT VOLUME APPLICATION
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 3 to 121/2 TONS, NOMINAL COOLING
BRYANT MODEL NUMBER: 551B
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
Outdoor rooftop- or slab-mounted, electrically controlled
cooling unit with optional heat utilizing a scroll compressor
for cooling duty and electric resistance coils for heating
duty. Unit shall discharge supply air vertically or horizontally as shown on contract drawings.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standards 210/
240 or 360 and 270.
B. Unit shall be designed to conform to ASHRAE 15, latest
revision, and in accordance with UL 1995.
C. Unit shall be UL tested and certified in accordance with
ANSI Z21.47 Standard and UL listed and certified under
Canadian Standards as a total package for safety
requirements.
D. Roof curb shall be designed to conform to NRCA
Standards.
E. Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.
F. Unit casing shall be capable of exceeding Federal Test
Method Standard No. 141 (Method 6061) 500-Hour Salt
Spray Test.
G. Each 551B unit is subjected to completely automated run
testing on the assembly line. Each unit contains a factorysupplied printout indicating tested pressures, amperages,
data, and inspectors; providing certification of the unit
status at the time of manufacture.
1.03 DELIVERY, STORAGE, AND HANDLING
Unit(s) shall be stored and handled per manufacturer’s
recommendations.
PART 2 — PRODUCTS
2.01 EQUIPMENT (STANDARD)
A. General:
Factory-assembled, single-piece cooling unit with
optional heat. Contained within the unit enclosure shall be
all factory wiring, piping, controls, refrigerant charge
(R-22), and special features required prior to field
start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
bonderized and coated with a baked enamel finish
on all externally exposed surfaces, and have primercoated interior panel surfaces.
2. Evaporator fan cabinet interior shall be insulated with
a minimum 1/2-in. thick flexible fiberglass insulation
coated on the air side.
3. Cabinet panels shall be easily removable for
servicing.
4. Holes shall be provided in the base rails for rigging
shackles to facilitate overhead rigging, and forklift
slots shall be provided to facilitate maneuvering.
5. Unit shall have a factory-installed, sloped condensate drain pan made of a non-corrosive material,
providing a minimum 3/4-in. connection with both vertical and horizontal drains and shall comply with
ASHRAE 62.
C.
D.
E.
F.
G.
H.
66
6. Unit shall have factory-installed filter access panel to
provide filter access with tool-less removal.
7. Unit shall have standard thru-the-bottom power connection capability.
Fans:
1. Indoor blower (evaporator fan) shall be of the beltdriven, double inlet, forward-curved centrifugal type.
Belt drive shall include an adjustable-pitch motor
pulley.
2. Indoor blower (evaporator fan) shall be made from
steel with a corrosion-resistant finish and shall be
dynamically balanced.
3. Bearings shall be of the sealed, permanently lubricated, ball-bearing type for longer life and lower
maintenance.
4. Condenser fan shall be of the direct-driven propeller
type and shall discharge air vertically.
5. Condenser fan shall have blades riveted to corrosionresistant steel spiders and shall be dynamically
balanced.
6. Condenser-fan motor shall be totally enclosed.
Compressor(s):
1. Scroll type, internally protected.
2. Factory rubber-shock mounted and internally spring
mounted for vibration isolation.
3. On independent circuits (090-150).
Coils:
1. Evaporator and condenser coils shall have aluminum
plate fins mechanically bonded to enhanced copper
tubes with all joints brazed.
2. Tube sheet openings shall be belled to prevent tube
wear.
3. Evaporator coil shall be of the face-split design
(090-150).
Refrigerant Components:
Refrigerant circuit components shall include:
1. Fixed orifice metering feed system.
2. Refrigeran filter drier.
3. Service gage connections on suction, discharge, and
liquid lines.
4. Ability to route gage hoses through unit top cover or
outdoor panel.
Filter Section:
1. Standard filter section shall consist of factoryinstalled low-velocity, throwaway 2-in. thick fiberglass
filters of commercially available sizes.
2. Filter face velocity shall not exceed 320 fpm at nominal airflows.
3. Filter section shall use only one size filter.
4. Filters shall be accessible through an access panel
with “no-tool” removal.
Controls and Safeties:
1. Unit Controls:
Unit shall be complete with self-contained low-voltage control circuit protected by a fuse on the 24-v
transformer side.
2. Standard Safeties:
a. Unit shall incorporate compressor overtemperature and overcurrent safety devices to shut off
compressor.
GUIDE SPECIFICATIONS (cont)
I.
J.
K.
L.
M.
*
b. Heating section shall be provided with the following minimum protections:
1) High-temperature limit switches.
2) Overcurrent protection.
c. High-pressure switch.
d. Low-pressure switch.
e. Freeze protection thermostat.
Operating Characteristics:
1. Unit shall be capable of starting and running at 125 F
ambient outdoor temperature, meeting maximum
load criteria of ARI Standard 210/240 or 360 at ±10%
voltage.
2. Compressor with standard controls shall be capable
of operation down to 25 F ambient outdoor
temperature.
Electrical Requirements:
All unit power wiring shall enter unit cabinet at a single
factory-predrilled location.
Motors:
1. Compressor motors shall be cooled by refrigerant
passing through motor windings and shall have line
break thermal and current overload protection.
2. Indoor blower (evaporator-fan) motor shall have
permanently lubricated bearings and inherent
automatic-reset thermal overload protection.
3. Totally enclosed condenser-fan motor shall have
permanently lubricated bearings and inherent
automatic-reset thermal overload protection.
Heating Section:
1. May be equipped with field-installed electric resistance heater(s) of the characteristics shown in the
equipment schedule.
2. Heater elements shall be open wire type, adequately
supported and insulated with ceramic bushings.
Special Features:
Certain features are not applicable when the features
designated by * are specified. For assistance in amending
the specifications, contact your local Bryant Sales Office.
1. Roof Curbs:
a. Formed galvanized steel with wood nailer strip
and capable of supporting entire unit weight.
b. Allows for installing and securing ductwork to curb
prior to mounting unit on the curb.
2. Integrated Economizers:
a. Integrated integral-modulating type capable of
simultaneous economizer and compressor
operation.
b. Includes all hardware and controls to provide
cooling with outdoor air.
c. Equipped with low-leakage dampers not to
exceed 3% leakage, at 1 in. wg pressure differential (Durablade economizer).
d. Capable of introducing up to 100% outdoor air in
both minimum and fully open positions.
e. Equipped with a gravity relief sliding plate damper
(Durablade economizer). Damper shall close
upon unit shutoff.
f. EconoMi$er shall be equipped with a barometric
relief damper with up to 100% of return air (036072) or 90% of return air (090-150) relief. The
Durablade economizer is equipped with 30% of
return-air relief (036-150).
3.
*
4.
5.
6.
7.
8.
9.
10.
67
g. Designed to close damper during loss-of-power
situations with emergency power supply (Durablade economizer) or spring return built into
motor (EconoMi$er).
h. Dry bulb outdoor-air thermostat protection shall
be provided as standard.
i. Durablade economizer is a guillotine-style
damper, and the EconoMi$er is a parallel blade
design.
50% Manual Outdoor-Air Damper:
Manual damper package shall consist of damper,
birdscreen, and rainhood which can be preset to
admit up to 50% outdoor air for year-round
ventilation.
25% Manual Outdoor-Air Damper:
Manual damper package shall consist of damper,
birdscreen, and rainhood which can be preset to
admit up to 25% outdoor air for year-round
ventilation.
100% Two-Position Damper:
a. Two-position damper package shall include single
blade damper and motor. Admits up to 100% outdoor air.
b. Damper shall close upon indoor (evaporator) fan
shutoff.
c. Designed to close damper during loss of power
situations.
d. Equipped with 15% barometric relief damper.
25% Two-Position Damper:
a. Two-position damper package shall include single
blade damper and motor. Admits up to 25% outdoor air.
b. Damper shall close upon indoor (evaporator) fan
shutoff.
Solid-State Enthalpy Control:
Capable of sensing outdoor-air enthalpy content
(temperature and humidity) and controlling economizer cut-in point to have minimum heat content air
passing over the evaporator coil for most efficient
system operation.
Differential Enthalpy Sensor:
a. For use with economizer only.
b. Capable of comparing enthalpy content (temperature and humidity) of outdoor and indoor air and
controlling economizer cut-in point at the most
economical level.
Electric Resistance Heaters and Single Point Kits:
a. Open wire nichrome elements with all necessary
safety operating controls.
b. UL listed and indicated on basic unit informative
plate.
c. Available in multiples to match heating
requirements.
d. Single point kits available for each heater when
required.
Low Ambient Control Packages:
Each package consists of condenser-coil temperature sensor to maintain condensing temperature
between 90 F and 110 F at outdoor ambient temperatures down to –20 F by condenser-fan speed modulation or condenser-fan cycling.
GUIDE SPECIFICATIONS (cont)
*
*
*
*
*
*
11. Thermostat and Subbase:
Provides staged cooling and heating automatic (or
manual) changeover, fan control, and indicator light.
12. Thru-The-Bottom Service Connectors:
Kit shall provide connectors to permit electrical connections to be brought to the unit through the
basepan.
13. Electronic Programmable Thermostat:
Capable of using deluxe full-featured electronic thermostat. Shall use built-in compressor cycle delay
control for both heating and cooling duty.
14. Condenser Coil Hail Guard Assembly:
Hail guard shall protect against damage from hail
and flying debris.
15. High-Static Motor and Drive (036-120 only):
High static motor and drive shall be factory-installed
to provide additional performance range.
16. Condenser Coil Grille:
The grille protects the condenser coil from damage
by large objects without increasing unit clearances.
17. Compressor Cycle Delay:
Unit shall be prevented from restarting for a minimum of 5 minutes after shutdown.
18. Fan/Filter Status Switch:
Provides status of evaporator fan (ON/OFF) or
indoor-air filter (CLEAN/DIRTY). Status shall be displayed with an indicator light at the thermostat.
19. Unit-Mounted, Non-Fused Disconnect Switch:
Shall be factory-installed, internally mounted, NEC
and UL approved non-fused switch shall provide unit
power shutoff. Shall be accessible from outside the
unit and shall provide power off lockout capability.
(Cannot be used with units rated over 80 amps.)
20. Convenience Outlet:
Shall be factory-installed and internally mounted with
easily accessible 115-v female receptacle. Shall
include 15 amp GFI receptacle with independent
fuse protection. Voltage required to operate convenience outlet shall be provided by a factory-installed
step-down transformer. Shall be accessible from outside the unit.
21. EconoMi$er and Power Exhaust:
EconoMi$er shall utilize a micro-processor based
control and a gear driven damper system.
EconoMi$er shall provide controls and spring return
on power loss. The system shall exhaust up to 100%
of the return air (vertical applications only).
22. Power Exhaust for Accessory EconoMi$er:
Two two-stage power exhaust shall be used in conjunction with EconoMi$er to provide the system with
the capability to exhaust up to 100% of return air.
The power exhaust is a field-installed accessory for
vertical and horizontal applications.
23. Dehumidification Package:
The dehumidification package is a factory-installed
option that provides increased dehumidification by
24.
25.
*
26.
27.
28.
29.
30.
further subcooling 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
airsteam greatly enhances the latent capacity of the
551B units.
The package shall be equipped with crankcase
heater(s), low pressure switch(es), and TXV(s). Low
pressure switch(es) prevents evaporator coil freeze
up and TXV(s) assure a positive superheat condition. If the operation of the subcooling coil is controlled by a field-installed, wall-mounted humidistat,
the dehumidification circuit will then operate only
when needed. Optional field connections for the
humidistat are made in the low voltage compartment
of the unit control box.
Humidistat:
Field-installed, wall-mounted humidistat is used to
control activation of the dehumidification package.
The humidistat can be set for humidity levels
between 20% and 80% relative humidity.
Light-Commercial Thermidistat:
Field-installed, wall mounted thermidistat is used to
control temperature and activation of Perfect Humidity™ package. The thermidistat can be set for humidity settings from 50% to 90% relative humidity.
Hinged Panel Option:
Shall be equipped with hinged access panels for the
filter, compressor, evaporator fan, and control box
areas. Filter hinged access panels permit tool-less
entry for changing filters. Each hinged access panel
is permanently attached to the rooftop unit.
Outdoor-Air Enthalpy Sensor:
The outdoor air enthalpy sensor shall be used with
the EconoMi$er device to provide single enthalpy
control. When used in conjunction with a return air
enthalpy sensor, the EconoMi$er device will provide
differential enthalpy control. the sensor allows the
EconoMi$er controller to determine if outside air is
suitable for free cooling.
Return-Air Enthalpy Sensor:
The return air enthalpy sensor shall be used with the
EconoMi$er device. When used in conjunction with
an outdoor air enthalpy sensor, the EconoMi$er
device will provide differential enthalpy control.
Return-Air Temperature Sensor:
The return-air temperature sensor shall be used with
the EconoMi$er device. When used in conjunction
with an outdoor-air temperature sensor, the
EconoMi$er device will provide differential temperature control.
Indoor-Air Quality (CO2) Sensor:
Shall have the ability to provide demand ventilation
indoor-air quality (IAQ) control through the
EconoMi$er with an IAQ sensor.
The IAQ sensor shall be available in duct mount, wall
mount and wall mount with LED display. The set
point shall have adjustment capability.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
UNIT MUST BE INSTALLED IN ACCORDANCE
WITH INSTALLATION INSTRUCTIONS
Copyright 2001 Bryant Heating & Cooling Systems
Printed in U.S.A.
2/01
Catalog No. 5255-104
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