Bryant 549C User Manual
COMMERCIAL
548F036-072
549B036-072
549C024-060
548F090-120
549B090-120
542J150,180
50-1219
50-1304
50-1214
Models 542J, 548F, 549B, 549C
SINGLE P ACKAGE ROOFT OP
ST ANDARD AND HIGH EFFICIENCY
HEA T PUMP UNITS
Sizes 024-180
DuraPac and DuraPac Plus
2 to 15 Tons
Standard-Efficiency (548F), and High-Efficiency (549B, 549C,
542J) heat pump units offer:
• Pre-painted galvanized steel cabinet for long life and quality
appearance
• Commercial strength base rails with built-in rigging capability
• Convertible design for vertical or horizontal supply/return
• Non-corrosive, sloped condensate drain pan, meets
ASHRAE 62 (IAQ)
• Two-inch return-air filters
• A wide assortment of factory-installed options available,
including high-static drives that provide additional performance range
• Factory-installed optional gear driven EconoMi$erIV (vertical
return for sizes 024-120 only) for use with standard rooftop
unit controls (includes CO
• Factory-installed optional gear driven EconoMi$er2 (vertical
return only) for use with third party controls (includes 4 to
20 mA actuator for demand control ventilation)
• State-of-the-art defrost system
• Dependable 4-way valve operation
Heat Options
• Field-installed electric heat available
• Glycol hydronic coils
sensor control capability)
2
FEATURES/BENEFITS
Every compact one-piece unit arrives fully assembled,
charged, tested, and ready to run.
QUIET, EFFICIENT OPERATION AND DEPENDABLE PERFORMANCE — Compressors have vibration isolators for quiet
operation. Efficient fan and motor design permits operation at
low sound levels.
Unit sizes 090-180 offer lower utility costs through part-load
operation using 2 stages of cooling.
Quiet and efficient operation is provided by belt-driven indoor
fans (standard on all units over 5 tons). The belt-driven indoor
fan is equipped with variable-pitch pulleys which allow adjustment within the rpm ranges of the factory-supplied pulleys.
Increased operating efficiency is achieved through computerdesigned coils featuring staggered internally enhanced copper
tubes. Fins are ripple-edged for strength, lanced, and double
waved for higher heat transfer.
Form No. PDS548F-36-6
TABLE OF CONTENTS
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Model Number Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . 4,5
ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,6
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
548F
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,15
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,17
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-54
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-64
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . 65-67
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69-72
549B, 549C
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73-75
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 76-78
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 79-80
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82-118
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119-130
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . 131-133
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .134
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 135-139
542J
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
Base Unit Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 142-144
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146-152
Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . 154-156
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .157
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 158-162
Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163,164
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165-168
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169
DURABLE, DEPENDABLE CONSTRUCTION — Designed for
durability in any climate, the weather-resistant cabinets are
constructed of galvanized steel and bonderized, and all exterior
panels are coated with a prepainted baked enamel finish. The
paint finish is non-chalking, and is capable of withstanding
ASTM (American Society for Testing and Materials) B117
500-hour Salt Spray Test. All internal cabinet panels are primed,
permitting longer life and a more attractive appearance for the
entire unit.
In addition, all size 024-120 units are designed with a sing le,
continuous top piece to eliminate any possible leaks. Totally
enclosed outdoor-fan motors and permanently lubricated bearings provide additional unit dependability.
Patented State-of-the-Art Chronotemp™ Defrost System
uses time and temperature to keep the outdoor coil frost-free for
economical, dependable operation. The Chronotemp defrost
board can be easily configured for defrost cycles eve ry 30, 50,
or 90 minutes.
Dependable 4-Way Valve Operation safely and efficiently
accomplishes cycle reversals, defrost, and normal operation.
EASY INST ALLATION AND CONVERSION
All Units are Shipped in the Vertical Duct Configuration for
fit-up to standard roof curbs. (3 different curb sizes fit unit sizes
024-072, 090-120, and 150,180 respectively.) The contractor
can order and install the roof curb early in the construction
stage, before decisions on size requirements are made.
All units feature a base rail design with forklift slots and rigging
holes for easier maneuvering. Durable packaging protects all
units during shipment and storage.
The units can be easily converted from a vertical to a horizontal
duct configuration by relocating the panels supplied with the
unit.
T o Convert 024-120 Units from vertical to horizontal discharge,
simply relocate 2 panels. The same basic unit can be used for a
variety of applications and can be quickly modified at the
jobsite.
To Convert Size 150 and 180 Units from vertical to horizontal
discharge, use the optional horizontal supply/return adapter
roof curb.
Convenient Duct Openings in the unit basepans permit sideby-side or concentric duct connections (see Application Data
section) without requiring internal unit modification (size
150,180 only).
NOTE: On units using horizontal supply and return, the accessory barometric relief or power exhaust MUST be installed on
the return ductwork.
Thru-the-bottom service connection capability comes standard
with the rooftop unit to allow power and control wiring to be
routed through the unit’s basepan, thereby minimizing roof penetrations (to prevent water leaks). Power and control connections are made on the same side of the unit to simplify
installation.
The Non-Corrosive Sloped Condensate Drain Pan permits
either an external horizontal side condensate drain (outside the
roof curb) or an internal vertical bottom drain (inside the roof
curb). Both options require an external, field-supplied P-trap.
Standard 2-in. Throwaway Filters are easily accessed
through a removable panel located above the air intake hood.
No tools are required to change unit filters.
All 024-120 Units are Designed With a Single, Continuous
Top Piece to eliminate leaking at the seams or gasketing.
Belt-Driven Indoor-Fan Motors allow maximum on-site flexi-
bility without changing motors or drives.
Field-Installed Accessory Electric heaters are available in a
wide range of capacities. An available single-point wiring kit
makes installation simple.
Low Voltage Wiring Connections are easily made due to the
large terminal board which is located for quick, convenient
access.
In addition, color-coded wires permit easy tracing and
diagnostics.
PROVEN COMPRESSOR RELIABILITY
Design techniques feature computer-programmed balance
between compressor, condenser , and evaporator. Bryant-specified
hermetic compressors are equipped with compressor overcurrent
and overtemperature protection to ensure dependability.
All units have a fixed orifice metering device which precisely
controls refrigerant flow, preventing slugging and flood-back,
while maintaining optimum unit performance. Refrigerant filter
driers are standard.
Standard Low Ambient Cooling Operation to 25 F; optional
head pressure control kit available for outdoor ambient con ditions to –20 F.
2
INTEGRATED ECONOMIZERS AND OUTDOOR-AIR
DAMPERS
Available as options or accessories, economizers and manual
outdoor-air dampers introduce outdoor air which mixes with the
conditioned air, improving indoor-air quality and often reducing
energy consumption.
During a first stage call for cooling, if the outdoor-air temperature is below the economizer control changeover set point, the
mixed-air sensor modulates the economizer outdoor-air damper
open to take advantage of free cooling provided by the outside
air. When second-stage cooling is called for, the compressor is
energized in addition to the economizer. If the outdoor-air temperature is above the changeover set point, the first stage of
compression is activated and the economizer damper stays at
minimum position.
Accessory upgrade kits allow for control by differential dry-bulb
temperature (outdoor vs return), outdoor air enthalpy
changeover, or more precise differential enthalpy control.
Units can be equipped with different economizer options to
meet specific controls applications. The factory-installed or
field-installed EconoMi$erIV and EconoMi$er2 are available.
The EconoMi$erIV is used with the standard rooftop unit
controls and includes an industry standard, stand-alone, solidstate control. The control can be used with a CO
sensor for
2
DCV (demand control ventilation) operation. For direct digital
control (DDC) applications, the EconoMi$er2 can be operated
using a third party controller. The EconoMi$er2 includes 4 to
20 mA actuator capability for demand control ventilation
applications.
All economizers incorporate a parallel blade, gear driven
damper system for efficient air mixing and reliable control. In
addition, the standard damper actuator includes a spring return
to provide reliable closure on power loss. The economi zers for
sizes 024-120 are equipped with up to 100% barometric relief
capability for high outdoor airflow operations. Economizers for
unit sizes 024-120 are available, factory-installed, for vertical
return only. Economizers for unit sizes 150 and 180 are compatible for vertical or horizontal return. An optional field-installed
barometric relief package is available for 150 and 180 size
units.
In addition, single-stage power exhaust is available as a fieldinstalled accessory for EconoMi$erIV to help maintain proper
building pressure.
For units without economizer, year-round ventilation is
enhanced by a manual outdoor-air damper. On size 024-120
units, a 25% or 50% manual damper is available as a fieldinstalled accessory. Unit sizes 150 and 180 are equipped with a
manual 25% damper.
SERVICE OPTIONS
Servicing a rooftop unit has never been easier with the new
factory-installed service options for these rooftop units. These
options include the following:
• Hinged access panels (549B, 549C and 542J only) are provided for the filter/indoor-fan motor, compressors, indoor fan,
and control box areas. Quick access to major components is
accomplished by simply unlatching and swinging open the
various panels. Each hinged panel is permanently mounted to
the unit, thereby eliminating the concern of a dropped or windblown panel puncturing delicate roof materials. The
4 extended access panels are also equipped with ‘‘tie back’’
retaining devices to hold the door in the open position while
servicing the unit.
• An external, covered, 115-v Ground Fault Interrupt (GFI)
receptacle is provided as a convenient power source for drills,
lights, refrigerant recovery units, or other electrical service
tools. Simply connect the outlet to a field-supplied and properly fused branch circuit power supply.
• An integral non-fused disconnect switch within the rooftop unit
reduces installation time, labor and material costs. Safety is
assured by an interlock which prevents access to the control
box unless the switch is in the OFF position. In addition, the
externally mounted handle incorporates power lockout capability to further protect service personnel.
INDOOR-AIR QUALITY BEGINS WITH BRYANT ROOFTOPS
Sloped condensate pans minimize biological growth in rooftop
units in accordance with ASHRAE Standard 62. Two-inch filters
with optional dirty filter indicator switch provide for greater particle reduction in the return air. The face-split evaporator coils
improve the dehumidification capability of standard units, maximize building humidity control.
Optional proportional reacting CO
sensor is available with the
2
EconoMi$erIV outdoor air damper option/accessory to aid the
IAQ benefits.
3
MODEL NUMBER NOMENCLATURE — 548F UNITS
Voltage Designation
E– 460-3-60
J– 208/230-1-60†
P– 208/230-3-60
T– 575-3-60
548F E X 090 000 AA
548F – Single-Package
Heat Pump
Unit
X–No Heat Installed.
(Field-installed electric heaters available.)
Factory-Installed Options*
Nominal Tons
036 – 3 090 – 7-1/2
048 – 4 120 – 10
060 – 5
072 – 6
Electric Heaters
000 – No factory-installed electric heaters
LEGEND
*Refer to Trade Price Sheets or contact your local representative for specific
information regarding which options are available on which units.
†Single-phase is only available on 036-060 size units.
NOTE: The example model number 548FEX090000AA designates a 71/2 ton
460-3-60 volt electric heat pump unit with factory-installed economizer.
ODS — Order Distribution System
Quality Assurance
Certified to ISO 9001:2000
a50-8038
LEGEND
*Available on 549C units only.
ODS — Order Distribution System
Quality Assurance
Certified to ISO 9001:2000
a50-8039
(ODS Model Number)
MODEL NUMBER NOMENCLATURE — 549B AND 549C UNITS
549B – Single-Packaged High-Efficiency
549C
Voltage Designation
E–460-3-60
J–208/230-1-60
P–208/230-3-60
X– No Heat Installed
Nominal Tons
024
036 – 3
048 – 4
060 – 5
072 – 6
090 – 7-1/2
102
120––
Heat Pump Unit
–
Single-Packaged High-Efficiency
Plus Heat Pump Unit
(Field-installed electric heaters available)
2*
–
8-1/2
10
(ODS Model Number)
549B E X 090 000 AA
Factory-Installed Options
See unit price pages for
factory-installed option codes
Electric Heaters
000 – No factory-installed electric heaters
4
MODEL NUMBER NOMENCLATURE — 542J150,180 UNITS
Nominal Cooling Capacity
150 – 12 Tons
180 – 15 Tons
Factory-Installed Outdoor
Air Upgrade Options
C– Economizer
H– 25% Manual Damper
542J E X 150 000 AB H B
542J – High-Efficiency Rooftop Units
Electric Heat Pumps
Voltage Designation
E–460-3-60
P–T–208/230-3-60
575-3-60
Heat Type
X– No Heat Installed
Electric Heaters
000 – No Factory-Installed Electric Heaters
Accessory Field-Installed Electric Heaters
Available
Fan Drive Position
(Standard Motor)
B– Standard Low-Medium
Fan Drive Static Capability
D– Alternate High Fan
Drive Static Capability
Design Series Code
AB – Economizer Design Change
Quality Assurance
Certified to ISO 9001:2000
a50-8040
UNIT
548F
036 3 35,600 10.20 10.00 34,400 6.7 84
048 4 46,500 10.00 9.70 46,500 7.0 80
060 5 57,000 10.00 9.90 57,000 7.5 82
UNIT
548F
072 6 70,000 9.05 72,400 3.20 42,000 2.14 — 82
090 7
120 10 112,000 9.00 105,000 3.10 59,000 2.00 9.0 84
COP — Coefficient of Performance
db — dry bulb
EER — Energy Efficiency Ratio
HSPF — Heating Seasonal Performance Factor
IPLV — Integrated Part-Load Values
SEER — Seasonal Energy Efficiency Ratio
wb — wet bulb
*Air Conditioning and Refrigeration Institute.
†Applies only to units with capacity of 60,000 Btuh or less.
**The IPLV applies only to 2-stage cooling heat pump units.
NOTES:
1. Rated in accordance with ARI Standards 210/240-95 and 270-95.
2. Ratings are net values, reflecting the effects of circulating fan heat.
3. ALL the 548F036-060 units are in compliance with ASHRAE 90.1
2001 Energy Standard for minimum SEER and EER requirements.
Refer to state and local codes or visit the following website:
http://solstice.crest.org/efficiency/bcap
with this standard pertains to a given geographical area of the United
States.
NOMINAL
TONS
NOMINAL
TONS
1
/
2
LEGEND
ARI* CAPACITY RATINGS
548F036-060
COOLING
Net Capacity
(Btuh)
Belt
Drive
SEER†
Direct
Drive
548F072-120
COOLING
Net Capacity
(Btuh)
86,000 9.00 78,000 3.00 39,000 1.80 9.3 86
EER
HEATING
(High)
Capacity
(Btuh)
COP
4. Ratings are based on:
Capacity
(Btuh)
to determine if compliance
Cooling Standard: 80 F db, 67 F wb indoor entering-air temperature
and 95 F db air entering outdoor unit.
IPLV Standard: 80 F db, 67 F wb indoor entering-air temperature and
80 F db outdoor entering-air temperature.
High-Temp Heating St andard: 70 F db indoor entering-air temperature
and 47 F db, 43 F wb outdoor entering-air temperature.
Low-Temp Heating Standard: 70 F db indoor entering-air temperature
and 17 F db, 15 F wb outdoor entering-air temperature.
5
HEATING
(High Temp)
Capacity
(Btuh)
HEATING
(Low)
HSPF
IPLV**
COP
SOUND
RATING
(decibels)
SOUND
RATING
(decibels)
ARI* CAP ACITY RATINGS (cont)
549C024-060
UNIT
549C
NOMINAL
TONS
Net Cap.
COOLING HEATING (High Temp)
(Btuh)
SEER†
Cap.
(Btuh)
HSPF†
024 2 24,000 14.0 23,600 8.10 76
036 3 37,000 14.0 36,000 8.10 76
048 4 46,000 14.0 46,000 8.00 76
060 5 58,500 14.0 58,000 8.00 80
549B036-060
UNIT
549B
NOMINAL
TONS
Net Cap.
036 3 35,600 13.1 34,800 7.7 76
048 4 45,000 13.0 45,000 7.8 76
060 5 58,000 13.0 55,000 7.7 80
COOLING HEATING (High Temp)
(Btuh)
SEER†
Cap.
(Btuh)
HSPF†
549B072-120
UNIT
549B
NOMINAL
TONS
COOLING
Net Cap.
(Btuh)
EER
HEATING
Cap.
(Btuh)
(High)
COP
072 6 71,000 10.5 69,000 3.4 37,000 2.2 80 —
090 7
102 8
1
/
2
1
/
2
88,000 10.3 85,000 3.3 48,000 2.2 82 10.5
98,000 10.3 96,000 3.3 52,000 2.2 110
120 10 116,000 10.3 103,000 3.3 64,000 2.2 84 10.4
LEGEND
Cap. — Net Capacity (Btuh)
COP — Coefficient of Performance
EER — Energy Efficiency Ratio
HSPF — Heating Seasonal Performance Factor
IPLV — Integrated Part-Load Values
SEER — Seasonal Energy Efficiency Ratio
*Air Conditioning and Refrigeration Institute.
†Applies only to units with capacity of 60,000 Btuh or less.
NOTE: Rated in accordance with ARI Standard 210/240-94 and 270-
95. Ratings are net values, reflecting effects of circulating fan heat.
Supplementary electric heat is not included. Ratings based on:
Cooling Standard: 80 F db (dry bulb), 67 F wb (wet bulb) 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.
High-Temp Heating Standard: 70 F db indoor entering-air te mpe ratu re
and 47 F db, 43 F wb outdoor entering-air temperature.
Low-Temp Heating Standard: 70 F db indoor entering-air temperature
and 17 F db, 15 F wb outdoor entering-air temperature.
ALL the 549B units are in compliance with ASHRAE 90.1 2001 Energy
Standard for minimum SEER and EER requirement s. Refer to state and
local codes or visit the following website: http://solstice.crest.org/
efficiency/bcap to determine if compliance with this standard pertains to
a given geographical area of the United States.
HEATING
Cap.
(Btuh)
(Low)
COP
SOUND
RATING
(decibels)
SOUND
RATING
(decibels)
SOUND
RATING
(decibels)
IPLV
12.7 (100%)
10.4 ( 50%)
542J150,180 UNITS
UNIT
542J
Total
kW
150 14.3 140,000 4500 12.4 9.8 136,000 12.4 3.2 72,000 10.0 2.1 87
180 18.5 172,000 5200 9.7 9.3 172,000 15.3 3.3 90,000 12.5 2.2 88
LEGEND
COP — Coefficient of Performance
db — Dry Bulb
EER — Energy Efficiency Ratio
ESP — External Static Pressure
IPLV — Integrated Part-Load Value
wb — Wet Bulb
*Air-Conditioning and Refrigeration Institute.
NOTE: 50HJQ units are rated in accordance with ARI Standard 340-93.
Cooling ratings are net values, reflecting the effects of circulating fan
heat. Ratings are based on:
ESP: –.35 in. wg
Cooling Standard: 80 F db, 67 wb indoor coil entering-air temperature
and 95 F outdoor entering-air temperature.
High-Temp Heating Standard: 70 F db indoor coil entering-air temperature and 47 F db, 43 F wb outdoor coil entering-air temperature.
Low-Temp Heating Standard: 70 F db indoor coil entering-air temperature and 17 F db, 15 F wb outdoor coil entering-air temperature.
COOLING HEATING-HIGH TEMP HEATING-LOW TEMP
Net
Capacity
(Btuh)
Cfm IPLV EER
Total
Capacity
(Btuh)
Total
kW
IPLV Standard: 80 F db, 67 F wb indoor entering-air temperature and
80 F db outdoor entering-air temperature.
ALL the 542J units are in compliance with ASHRAE 90.1 2001 Energy
Standard for minimum SEER and EER requirement s. Refer to state and
local codes or visit the following website: http://solstice.crest.org/
efficiency/bcap to determine if compliance with this standard pertains to
a given geographical area of the United States.
COP
Total
Capacity
(Btuh)
Total
kW
COP
6
SOUND
RATING
(decibels)
OPTIONS AND ACCESSORIES
548F036-120
ITEM OPTION* ACCESSORY†
100% Open Two-Position Damper X
25% Open Two-Position Damper X
Alternate Motors and Drives XX
Convenience Outlet (Load Side) X
Copper Fins Indoor and Outdoor Coil X
Copper Fins Outdoor Coil X
E-Coat Outdoor Coil (Aluminum) X
E-Coat Outdoor Coil (Copper) X
EconoMi$erIV with Controller XX
EconoMi$er2 (without Controller) XX
Electric Heat X
Electronic Programmable Thermostat X
Emergency Heat Package X
Enthalpy or Differential Enthalpy Sensor X
Fan/Filter Status X
High-Static Motor and Drive X
Hinged Panel Kit for Economizer X
Indoor Air Quality (CO
Louvered Hail Guard X
Manual Outdoor-Air Damper (50% or 100%) X
Motormaster® I, II Head Pressure Control (Low Ambient Kit) X
Outdoor Air Enthalpy Sensor X
Outdoor Air/Return Air Temperature Sensor X
Outdoor Coil Grille X
Outdoor Coil Hail Guard Assembly X
Power Exhaust with Barometric Relief X
Pre-coat Aluminum Fins on Outdoor Coil X
Return Air Enthalpy Sensor X
Return Air Temperature Sensor X
Roof Curbs (Vertical and Horizontal Discharge) X
Thermostats and Subbases X
Thru-the-Bottom Utility Connections X
Time Guard II Control Circuit (Compressor Cycle Delay) X
Unit-Mounted Non-Fused Disconnect X
*Factory-installed.
†Field-installed.
NOTES:
1. Refer to unit guide specifications, price pages, or contact your
local representative for accessory and option package information.
2. Some options may increase product lead times.
) Sensor X
2
7
OPTIONS AND ACCESSORIES (cont)
549B036-120, 549C024-060
ITEM OPTION* ACCESSORY†
100% Open Two-Position Damper X
25% Open Two-Position Damper X
Alternate Motors and Drives XX
Convenience Outlet (Load Side) X
Copper Fins Indoor and Outdoor Coil X
Copper Fins Outdoor Coil X
E-Coat Outdoor Coil (Aluminum) X
E-Coat Outdoor Coil (Copper) X
EconoMi$erIV with Controller XX
EconoMi$er2 (without Controller) XX
Electric Heat X
Electronic Programmable Thermostat X
Emergency Heat Package X
Fan/Filter Status X
Hinged Access Panels X
Hinged Panel Kit for Economizer X
Indoor Air Quality (CO
Louvered Hail Guard X
Manual Outdoor-Air Damper X
Motormaster® I, II Head Pressure Control (Low Ambient Kit) X
Outdoor Air Enthalpy Sensor X
Outdoor Coil Grille X
Outdoor Coil Hail Guard Assembly X
Outdoor Air/Return Air Temperature Sensor X
Power Exhaust with Barometric Relief X
Pre-coat Aluminum Fins on Outdoor Coil X
Return Air Enthalpy Sensor X
Return Air Temperature Sensor X
Roof Curbs (Vertical and Horizontal Discharge) X
Thermostats and Subbases X
Thru-the-Bottom Utility Connections X
Time Guard II Control Circuit (Compressor Cycle Delay) X
Unit-Mounted Non-Fused Disconnect X
*Factory-installed.
†Field-installed.
NOTES:
1. Refer to unit guide specifications, price pages, or contact your
local representative for accessory and option package information.
2. Some options may increase product lead times.
) Sensor X
2
8
OPTIONS AND ACCESSORIES (cont)
542J150,180
ITEM OPTION* ACCESSORY†
25% Open Two-Position Damper X
Alternate Motors and Drives XX
Barometric Relief Damper (Not for use with horizontal roof curb) X
Convenience Outlet (Load Side) X
Copper Fins Indoor and Outdoor Coil X
Copper Fins Outdoor Coil X
E-Coat Outdoor Coil (Aluminum) X
E-Coat Outdoor Coil (Copper) X
EconoMi$erIV with Controller XX
EconoMi$er2 (without Controller) X
Electric Heat X
Electronic Programmable Thermostat X
Emergency Heat Package X
Fan/Filter Status X
Hinged Access Panels X
Horizontal Adapter Curb X
Hydronic Glycol Coil X
Indoor Air Quality (CO
Manual Outdoor-Air Damper X
Motormaster® V Head Pressure Control (Low Ambient Kit) X
Outdoor Air Enthalpy Sensor X
Power Exhaust without Barometric Relief X
Pre-coat Aluminum Fins on Outdoor Coil X
Return Air Enthalpy Sensor X
Return Air Temperature Sensor X
Roof Curbs (Vertical and Horizontal Discharge) X
Thermostats and Subbases X
Time Guard II Control Circuit (Compressor Cycle Delay) X
Winter Start Time Delay X
*Factory-installed.
†Field-installed.
NOTES:
1. Refer to unit price pages or contact your local representative for
accessory and option package information.
2. Some options may increase product lead times.
) Sensor X
2
9
OPTIONS AND ACCESSORIES (cont)
Roof Curbs (Horizontal and Vertical) permit installation and
securing of ductwork to curb prior to mounting unit on the curb.
Both 14-in. and 24-in. roof curbs are available as field-installed
accessories.
EconoMi$erIV is available as a factory-installed option in
vertical supply/return configuration only for unit sizes 036-120.
Vertical or horizontal configuration is available for unit sizes 150
and 180. (EconoMi$erIV is available as a field-installed accessory for horizontal and/or vertical supply return configurations.)
The EconoMi$erIV is provided with an industry standard,
standalone, solid-state controller that is easy to configure and
troubleshoot. The EconoMi$erIV is compatible with non-DDC
applications. EconoMi$erIV is equipped with a barometric relief
damper capable of relieving up to 100% return air. Dry bulb
outdoor-air temperature sensor is provided as standard. The
return air sensor, indoor enthalpy sensor, and outdoor enthalpy
sensor are provided as field-installed accessories to provide
enthalpy control, differential enthalpy control, and differential
dry bulb temperature control.
EconoMi$er2 is available as a factory-installed option in vertical supply/return configuration only. (EconoMi$er2 is available
as a field-installed accessory for horizontal and/or vertical
supply return configurations.) The EconoMi$er2 is provided
without a controller for use with field-installed third-party controls. EconoMi$er2 is equipped with a barometric relief damper
capable of relieving up to 100% return air. Dry bulb outdoor-air
temperature sensor is provided as standard. The enthalpy,
differential temperature (adjustable), and differential enthalpy
control are provided as field-installed accessories. The
EconoMi$er2 is capable of control from a 4 to 20 mA signal
through optional 4 to 20 mA design without microprocessor
control (required for third party control interface).
Manual Outdoor-Air Damper accessory can be preset to
admit up to 50% outdoor air for year round ventilation.
Tw o- Po s it i on Da m pe r package is available as an accessory.
Both 25% or 100% outdoor air dampers are available.
Head Pressure Control (Motormaster) accessory package
maintains 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 and wind baffles.
Electric Resistance Heaters are UL listed and available to
match heating requirements. Single point kits available for each
heater when required. Heaters are field-installed accessories.
Unit-Mounted, Non-Fused Disconnect Switch provides unit
power shutoff. The switch is accessible from outside the unit
and provides power off lockout capability and is available as
factory-installed option .
Convenience Outlet is factory-installed and internally mounted
with easily accessible 115-v female receptacle.
Compressor Cycle Delay (Time Guard II) prevents unit from
restarting for minimum of 5 minutes after shutdown.
Thru-the-Bottom Utility Connectors permit electrical connections to be brought to the unit through the basepan. Connectors
are a field-installed accessory.
Fan/Filter Status Switch accessory provides status of indoor
(evaporator) fan (ON/ OFF) or filter (CLEAN/DIRTY).
Power Exhaust accessory will provide system exhaust of up to
100% of return air (vertical only). The power exhaust is a fieldinstalled accessory (separate vertical and horizontal design).
Ultra-Violet Germicidal Lamps eliminate odor causing mold
and fungus that may develop in the wet area of the evaporator
section of the unit. The high output, low temperature germicidal
lamps are field installed in the evaporator section of the un it,
aimed at the evaporator coil and condensate pan.
Hinged Panel Option provides hinged access panels for the filter, compressor, evaporator fan, and control box areas. Filter
hinged panels permit tool-less entry for changing filters. Each
hinged panel is permanently attached to the rooftop unit and is
a factory-installed option.
Emergency Heat Control Package accessory activates auxiliary heat when necessary if mechanical heating is locked out.
10
TR1
24 Vac
COM
TR
24
Vac
HOT
12
3
4
5
EF
EF1
+
_
P1
T1
P
T
N
EXH
2V 10V
EXH
Set
Set
2V 10V
2V 10V
DCV
DCV
Free
Cool
B
C
A
D
SO+
SR+
SR
SO
AQ1
AQ
DCV
Min
Pos
Open
Max
N1
ECONOMI$ERIV CONTROL
GEAR-DRIVEN ECONOMI$ERIV COMPONENT PARTS
(3 to 6 Ton Unit Shown)
UNIT-MOUNTED DISCONNECT (Sizes 150,180)
UNIT-MOUNTED DISCONNECT (Sizes 024-120)
CONVENIENCE OUTLET
a50-7750
a50-8041
50-1247
50-1246
a48-4181
a48-7445
OPTIONS AND ACCESSORIES (cont)
WIRING
HARNESS
ACTUATOR
ECONOMI$ERIV
CONTROLLER
OUTSIDE AIR
TEMPERATURE SENSOR
LOW AMBIENT
SENSOR
11
OPTIONS AND ACCESSORIES (cont)
CONTROL BOX HINGED PANEL OPTION,
549B036-072 UNITS SHOWN
CONTROL BOX HINGED PANEL OPTION,
549B090-120 UNITS SHOWN
COMPRESSOR HINGED PANEL OPTION,
549B090-120 UNITS SHOWN
COMPRESSOR HINGED PANEL OPTION,
549B036-060 UNITS SHOWN
NOTE: Hinged access panels are not available on 548F units.
a50-8042
50-1298
50-1288
50-1289
12
OPTIONS AND ACCESSORIES (cont)
EVAPORATOR-FAN HINGED PANEL OPTION
FILTER HINGED PANEL OPTION
NOTE: Hinged access panels are not available on 548F units.
LOUVERED HAIL GUARD OPTON
(024-120 only)
50-1290
a50-8043
a50-8059
13
PHYSICAL DATA
548F
548F036-072
UNIT SIZE 548F 036 048 060 072
NOMINAL CAPACITY (tons) 3456
OPERATING WEIGHT (lb)
Unit 500 520 550 590
Economizer
EconoMi$erIV or EconoMi$er2 50 50 50 50
Roof Curb* 115 115 115 115
COMPRESSOR Hermetic
Quantity 1111
Oil (oz) 45 54 50 54
REFRIGERANT TYPE R-22
Operating Charge (lb-oz)
Circuit 1 5-1 6-0 8-0 11-2
Circuit 2 ————
OUTDOOR COIL
Rows...Fins/in. 1...17 1...17 2...17 2...17
Total Face Area (sq ft) 10.31 14.58 12.25 16.53
3
/8-in. OD Enhanced Copper Tubes, Aluminum Lanced Fins, Fixed Orifice Metering Device
OUTDOOR FAN Propeller Type
Nominal Cfm 4000 4000 4000 4000
Quantity...Diameter (in.) 1...22.0 1...22.0 1...22.0 1...22.0
Motor Hp...Rpm
Watts Input (Total) 325 325 325 325
INDOOR COIL
Rows...Fins/in. 2...15 2...15 3...15 3...15
Total Face Area (sq ft) 4.2 4.2 5.5 5.5
1
/4...1100
3
/8-in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Fixed Orifice Metering Device
1
/4...1100
1
/4...1100
1
/4...1100
INDOOR FAN Centrifugal Type
Quantity...Size (in.) Std 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10
Type Drive Std Direct Direct Direct Belt
Nominal Cfm 1200 1600 2000 2400
Maximum Continuous Bhp Std .34 .75 1.20 2.40
Motor Frame Size Std 48 48 48 56
Nominal Rpm High/Low Std 860/800 1075/970 1075/970 —
Fan Rpm Range Std — — — 1070-1460
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std — — — 2.8/3.8
Nominal Motor Shaft Diameter (in.) Std
Fan Pulley Pitch Diameter (in.) Std ———4.5
Belt, Quantity...Type...Length (in.) Std — — — 1...A...40
Pulley Center Line Distance (in.) Std — — — 14.7-15.5
Speed Change per Full Turn of
Movable Pulley Flange (rpm) Std
Movable Pulley Maximum Full Turns
From Closed Position Std
Factory Setting Std ——— 3
Factory Speed Setting (rpm) Std — — — 1225
Fan Shaft Diameter at Pulley (in.)
Alt 1...10 x 10 1...10 x 10 1...10 x 10 —
High-Static 1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10
Alt Belt Belt Belt —
High-Static Belt Belt Belt Belt
Alt 1.00 1.00 1.30/2.40† —
High-Static 2.40 2.40 2.90 2.90
Alt 48 48 56 —
High-Static 56 56 56 56
Alt 1620 1620 1725 —
High-Static 1725 1725 1725 1725
Alt 760-1000 770-1175 878-1192 —
High-Static 1075-1455 1075-1455 1300-1685 1300-1685
Alt 1.9/2.9 1.9/2.9 2.4/3.4 —
High-Static 2.8/3.8 2.8/3.8 3.4/4.4 3.4/4.4
Alt
High-Static
Alt 4.5 4.0 4.5 —
High-Static 4.5 4.5 4.5 4.5
Alt 1...A...34 1...A...34 1...A...39 —
High-Static 1...A...39 1...A...39 1...A...40 1...A...40
Alt 10.0-12.4 10.0-12.4 14.7-15.5 —
High-Static 10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5
1
/
2
1
/
2
5
/
8
1
/
2
1
/
2
5
/
8
1
/
2
5
/
8
5
/
8
5
/
8
—
5
/
8
———80
Alt 48 70 80 —
High-Static 65 65 60 60
——— 5
Alt 556—
High-Static 6655
Alt 333—
High-Static 3
Alt 856 932 1035 —
High-Static 1233 1233 1416 1416
1
/
2
5
/
8
31/
2
5
/
8
31/
2
5
/
8
31/
2
5
/
8
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential) 450 ± 50
Cutout 428
Reset (Auto.) 320
LOSS-OF-CHARGE SWITCH (psig)
Cutout 7 ± 3
Reset (Auto.) 22 ± 7
FREEZE-PROTECTION THERMOSTAT (F)
Opens 30 ± 5
Closes 45 ± 5
OUTDOOR-AIR INLET SCREENS Cleanable. Quantity and size depend on options selected.
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 2...16 x 25 x 2
LEGEND
Bhp — Brake Horsepower
*Weight of 14-in. roof curb.
†Single phase/three phase.
NOTE: The 548F units have a loss-of-charge switch located in the liquid line.
14
548F
PHYSICAL DATA
548F090-120
NOMINAL CAPACITY (tons) 7
UNIT SIZE 548F 090 120
OPERATING WEIGHT (lb)
Unit 940 1015
Economizer
EconoMi$erIV or EconoMi$er2 75 75
Roof Curb* 143 143
COMPRESSOR (Hermetic) Reciprocating Scroll
Quantity 22
Oil (oz) 45 ea 54 ea
REFRIGERANT TYPE R-22
Operating Charge (lb-oz)
Circuit 1 5-14 7-14
Circuit 2 5-13 8- 3
OUTDOOR COIL
Rows...Fins/in. 1...17 2...17
Total Face Area (sq ft) 20.50 18.30
OUTDOOR FAN Propeller Type
Nominal Cfm 6500 6500
Quantity...Diameter (in.) 2...22 2...22
Motor Hp...Rpm
Watts Input (Total) 500 500
INDOOR COIL
Rows...Fins/in. 3...15 3...15
Total Face Area (sq ft) 8.0 11.1
3
INDOOR FAN Centrifugal Type
Quantity...Size (in.) Std 1...15 x 15 1...15 x 15
Type Drive Std Belt Belt
Nominal Cfm 3000 4000
Maximum Continuous Bhp Std 2.40 2.40
Motor Frame Size Std 56 56
Nominal Rpm Std ——
Fan Rpm Range Std 590- 840 685- 935
Motor Bearing Type Ball Ball
Maximum Allowable Rpm 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std 2.4/3.4 2.8/3.8
Nominal Motor Shaft Diameter (in.) Std
Fan Pulley Pitch Diameter (in.) Std 7.0 7.0
Belt, Quantity...Type...Length (in.) Std 1...A...53 1...A...49
Pulley Center Line Distance (in.) Std 16.75-19.25 15.85-17.50
Speed Change per Full Turn of
Moveable Pulley Flange (rpm)
Moveable Pulley Maximum Full Turns
From Closed Position
Factory Setting Std 55
Factory Speed Setting (rpm) Std 590 685
Fan Shaft Diameter at Pulley (in.) 11
Alt 1...15 x 15 1...15 x 15
High-Static 1...15 x 15 1...15 x 15
Alt Belt Belt
High-Static Belt Belt
Alt 2.40 2.90
High-Static 3.70 5.25
Alt 56 56
High-Static 56 56
Alt ——
High-Static 1725 1725
Alt 685- 935 835-1085
High-Static 860-1080 830-1130
Alt 2.8/3.8 3.4/4.4
High-Static 4.0/5.0 2.8/3.8
Alt
High-Static
Alt 7.0 7.0
High-Static 8.0 5.8
Alt 1...A...49 1...A...51
High-Static 1...A...65 1...BX...48
Alt 16.75-19.25 15.85-17.50
High-Static 16.75-19.25 15.85-17.50
Std 50 50
Alt 50 50
High-Static 60 60
Std 55
Alt 55
High-Static 56
Alt 55
High-Static 55
Alt 685 835
High-Static 860 887
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential) 450 ± 50
Cutout 428
Reset (Auto.) 320
LOSS-OF-CHARGE (LOW-PRESSURE) SWITCH (psig)
Cutout 7 ± 3
Reset (Auto.) 22 ± 5
FREEZE PROTECTION THERMOSTAT (F)
Opens 30 ± 5
Closes 45 ± 5
OUTDOOR-AIR INLET SCREENS Cleanable.
RETURN-AIR FILTERS Throwaway
Quantity...Size (in.) 4...16 x 20 x 2 4...20 x 20 x 2
LEGEND
Bhp — Brake Horsepower
*Weight of 14-in. roof curb.
1
/
2
3
/8-in. OD Enhanced Copper Tubes, Aluminum Lanced Fins,
1
/4...1100
/8-in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins,
Fixed Orifice Metering Device
Fixed Orifice Metering Device
5
/
8
5
/
8
7
/
8
10
1
/4...1100
5
7
7
/
8
/
8
/
8
Screen quantity and size vary based on options selected.
15
BASE UNIT DIMENSIONS
548F036-072
a50-8044
548F
16
BASE UNIT DIMENSIONS (cont)
548F090,120
a50-8045
548F
17
ACCESSORY DIMENSIONS
TO ENSURE AIRTIGHT CONNECTION.
PLACE UNIT AS CLOSE TO THIS
END AS POSSIBLE
TO ENSURE AIRTIGHT CONNECTION.
PLACE UNIT AS CLOSE TO THIS
END AS POSSIBLE
ROOF CURB
ACCESSORY
A UNIT SIZE
CRRFCURB001A00
1′-2″
[356]
548F036-072
CRRFCURB002A00
2′-0″
[610]
NOTES:
1. Roof curb accessory is shipped disassembled.
2. In su late d 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
002A00 are for thru-the-curb type gas. Packages
CRBTMPWR003A00 and 004A00 are for thru-thebottom type gas connections.
CONNECTOR
PKG. ACCY.
BC
D ALT
DRAIN HOLE
GAS POWER CONTROL
CRBTMPWR001A00
1′-9
11
/
16
″
[551]
1′-4″
[406]
13/
4
″
[44.5]
3
/
4
″
[19] NPT
3
/4″ [19] NPT
1
/
2
″
[12.7]
CRBTMPWR002A00 1
1
/4″ [31.7]
CRBTMPWR003A00
1
/
2
″
[12.7] NPT
3
/4″ [19] NPT
1
/
2
″
[12.7]
CRBTMPWR004A00
3
/
4
″
[19] NPT
11/4″ [31.7]
548F036-072
a48-5374
548F
18
ACCESSORY DIMENSIONS (cont)
TO ENSURE AN AIRTIGHT CONNECTION,
PLACE UNIT ON CURB AS CLOSE TO
DUCT END AS POSSIBLE.
TO ENSURE AN AIRTIGHT CONNECTION,
PLACE UNIT ON CURB AS CLOSE TO
DUCT END AS POSSIBLE.
CONNECTOR
PKG. ACCY.
BC
D ALT
DRAIN
HOLE
GAS POWER CONTROL
CRBTMPWR001A00
2′-87/
16
″
[827]
1′-1015/
16
″
[583]
13/
4
″
[44.5]
3
/
4
″
[19] NPT
3
/4″ [19] NPT
1
/
2
″
[12.7] NPT
CRBTMPWR002A00 1
1
/4″ [31.7]
CRBTMPWR003A00
1
/
2
″
[12.7] NPT
3
/4″ [19] NPT
1
/
2
″
[12.7] NPT
CRBTMPWR004A00
3
/
4
″
[19] NPT
11/4″ [31.7]
NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels: 1-in. thick polyurethane foam,
1
3
/4 lb density.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: 16-gage steel.
5. Attach ductwork to curb (flanges of duct rest on
curb).
6. Service clearance 4 ft on each side.
7. Direction of airflow.
8. Connector packages CRBTMPWR001A00 and
2A00 are for thru-the-curb gas type. Packages
CRBTMPWR003A00 and 4A00 are for thruthe-bottom type gas connections.
ROOF CURB
ACCESSORY
“A”
UNIT SIZE
548F
CRRFCURB003A00 1′-2″ [356]
090,120
CRRFCURB004A00 2′-0″ [610]
548F090,120
a50-6162
548F
19
SELECTION PROCEDURE (WITH 548F048 EXAMPLE)
548F
I DETERMINE COOLING AND HEATING LOADS AT
DESIGN CONDITIONS.
Given:
Required Cooling Capacity (TC). . . . . . . . . . . 38,000 Btuh
Sensible Heat Capacity (SHC) . . . . . . . . . . . . 24,000 Btuh
Required Heating Capacity. . . . . . . . . . . . . . . 35,000 Btuh
Outdoor Entering-Air Temperature db. . . . . . . . . . . . . 95 F
Outdoor-Air Winter Design Temperature . . . . . . . . . . 0° F
Indoor-Air Winter Design Temperature. . . . . . . . . . . . 70 F
Indoor-Air
Temperature . . . . . . . . .80 F edb (entering air, dry bulb)
67 F ewb (entering air, wet bulb)
Indoor-Air Quantity . . . . . . . . . . . . . . . . . . . . . . . 1600 cfm
External Static Pressure. . . . . . . . . . . . . . . . . . 0.45 in. wg
Electrical Characteristics (V-Ph-Hz) . . . . . . . . . . 230-3-60
II SELECT UNIT BASED ON REQUIRED COOLING
CAPACITY.
Enter Cooling Capacities table at outdoor entering temperature of 95 F, indoor air entering at 1600 cfm and
67 F ewb. The 548F048 unit will provide a total cooling
capacity of 49,900 Btuh and a sensible heat capacity of
33,900 Btuh.
For indoor-air temperature other than 80 F edb, calculate
sensible heat capacity correction, as required, using the
formula found in Note 3 following the cooling capacities
tables.
NOTE: Unit ratings are gross capacities and do not
include the effect of indoor-fan motor heat. To calculate
net capacities, see Step V.
III SELECT ELECTRIC HEAT.
Enter the Instantaneous and Integrated Heating Ratings
table at 1600 cfm. At 70 F return indoor air and 0° F air
entering outdoor coil, the integrated heating capacity is
18,000 Btuh. (Select integrated heating capacity value
since deductions for outdoor-coil frost and defrosting have
already been made. No correction is required.)
The required heating capacity is 35,000 Btuh. Therefore,
17,000 Btuh (35,000 – 18,000) additional electric heat is
required.
Determine additional electric heat capacity in kW.
Enter the Electric Heating Capacities table (page 52) for
548F048 at 208/230, 3 phase. The 6.5-kW heater at 240 v
most closely satisfies the heating required. To calculate
kW at 230 v, use the Multiplication Factors table.
6.5 kW x .92 = 5.98 kW
6.5 kW x .92 x 3413 = 20,410 Btuh
Total unit heating capacity is 38,410 Btuh (18,000 +
20,410).
IV DETERMINE FAN SPEED AND POWER REQUIRE-
MENTS AT DESIGN CONDITIONS.
Before entering Fan Performance tables, calculate the
total static pressure required based on unit components.
From the given and the Pressure Drop tables, find:
External static pressure .45 in. wg
EconoMi$erIV .07 in. wg
Electric heat .09 in. wg
Total static pressure .61 in. wg
Enter the Fan Performance table for 548F048 vertical discharge. At 1600 cfm and 230-v high speed, the standard
motor will deliver 0.76 in. wg static pressure, 723 watts,
and 0.64 brake horsepower (bhp). This will adequately
handle job requirements.
V DETERMINE NET CAPACITIES.
Capacities are gross and do not include the effect of
indoor-fan motor (IFM) heat.
Determine net cooling capacity as follows:
Net capacity = Total capacity – IFM heat
= 49,900 Btuh – (723 Watts x 3.413
Btuh/Watts)
= 49,900 Btuh – 2468 Btuh
= 47,432
Net sensible capacity = 33,900 Btuh – 2468 Btuh
= 31,432 Btuh
Integrated heating capacity is maximum (instantaneous)
capacity less the effect of frost on the outdoor coil and the
heat required to defrost it. Therefore, net capacity is equal
to 38,410 Btuh, the total heating capacity determined in
Step III.
17,000 Btuh
3413 Btuh/kW
= 5.0 kW of heat required.
20
548F
548F036 (3 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
TC 42.4 39.9 36.5 43.0 41.2 38.7 45.1 42.8 40.3
75
SHC 16.7 22.0 26.8 17.5 24.2 30.9 19.3 26.9 34.1
kW 2.77 2.71 2.62 2.78 2.74 2.68 2.85 2.79 2.73
TC 41.5 38.4 34.8 43.3 40.4 37.0 44.0 41.7 38.7
85
SHC 16.6 21.6 26.2 18.2 24.6 30.3 19.3 27.2 33.7
kW 3.01 2.92 2.80 3.07 2.98 2.88 3.09 3.03 2.94
TC 40.0 36.3 33.0 42.3 38.5 35.2 43.4 40.0 36.7
95
SHC 16.2 20.9 25.7 18.2 24.2 29.8 19.7 27.2 32.7
kW 3.24 3.10 2.99 3.32 3.19 3.07 3.36 3.24 3.13
105
115
125
TC 38.4 34.7 31.0 40.0 36.7 33.1 41.2 37.7 35.2
SHC 15.7 20.5 24.8 17.5 23.9 28.8 19.3 26.6 31.7
kW 3.47 3.32 3.16 3.53 3.41 3.26 3.58 3.44 3.35
TC 36.1 32.5 28.9 38.1 34.3 31.1 39.3 35.5 33.2
SHC 15.1 19.8 23.9 17.2 23.2 27.8 19.1 26.2 30.2
kW 3.66 3.50 3.32 3.76 3.59 3.44 3.81 3.65 3.54
TC 34.2 30.5 26.8 35.9 32.0 29.3 36.8 33.0 31.3
SHC 14.6 19.2 22.9 16.7 22.6 26.3 18.5 25.5 28.4
kW 3.88 3.68 3.49 3.97 3.77 3.62 4.02 3.83 3.74
548F048 (4 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
TC 55.5 51.9 47.4 56.9 54.6 50.3 59.3 56.5 52.1
75
SHC 24.5 31.2 37.4 26.0 35.2 43.4 28.4 39.0 47.6
kW 3.80 3.70 3.55 3.84 3.79 3.66 3.93 3.86 3.71
TC 53.4 49.7 45.3 56.3 52.6 47.8 57.5 54.1 49.8
85
SHC 23.8 30.4 36.7 26.3 34.9 42.6 28.3 38.6 46.9
kW 4.10 3.99 3.84 4.23 4.11 3.94 4.27 4.16 4.01
TC 52.0 47.4 43.0 53.7 49.9 45.5 54.5 51.6 47.4
95
SHC 23.4 29.6 35.8 25.5 33.9 41.6 27.3 38.2 45.2
kW 4.47 4.28 4.11 4.53 4.39 4.23 4.56 4.48 4.29
105
TC 49.3 45.0 40.6 51.8 47.2 43.0 52.6 48.7 45.4
SHC 22.5 28.8 34.7 25.3 33.0 40.3 27.1 37.1 43.3
kW 4.77 4.59 4.39 4.90 4.68 4.52 4.92 4.76 4.63
115
TC 46.6 42.4 38.0 48.8 44.6 40.6 50.2 45.8 43.2
SHC 21.7 27.9 33.6 24.3 32.4 38.7 26.8 36.1 41.2
kW 5.08 4.90 4.66 5.21 5.01 4.81 5.29 5.06 4.96
125
TC 44.0 39.6 35.4 45.6 41.6 38.3 47.0 42.9 40.9
SHC 20.9 26.9 32.4 23.3 31.6 36.5 25.9 35.6 39.0
kW 5.45 5.21 4.96 5.51 5.34 5.14 5.60 5.41 5.30
548F060 (5 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
TC 69.3 64.5 59.3 70.8 67.9 62.8 72.9 69.3 65.4
75
SHC 30.9 39.2 47.4 33.1 44.9 55.4 35.8 49.4 61.4
kW 4.28 4.15 4.03 4.32 4.25 4.12 4.38 4.29 4.19
TC 67.7 62.4 56.8 69.1 65.7 60.2 71.1 67.7 63.2
85
SHC 30.4 38.6 46.5 32.8 44.6 54.4 35.8 50.0 59.8
kW 4.76 4.61 4.49 4.79 4.72 4.56 4.86 4.78 4.65
TC 65.2 59.8 54.4 67.7 62.9 57.6 69.1 64.8 60.7
95
SHC 29.6 37.6 45.5 32.8 43.6 53.2 35.6 49.3 57.7
kW 5.27 5.10 4.97 5.35 5.20 5.07 5.39 5.27 5.14
105
TC 62.3 57.2 51.8 65.1 59.6 54.9 66.8 61.7 58.3
SHC 28.6 33.8 44.4 32.1 42.6 51.6 35.4 48.2 55.5
kW 5.79 5.66 5.50 5.90 5.73 5.61 5.97 5.79 5.68
115
TC 59.7 54.2 49.0 61.7 57.0 52.5 63.2 58.4 55.8
SHC 27.6 35.8 43.2 31.1 41.9 49.6 34.3 47.0 53.2
kW 6.37 6.24 6.06 6.47 6.34 6.20 6.53 6.36 6.31
125
TC 56.5 51.0 46.0 58.2 53.5 49.8 59.4 55.1 53.0
SHC 26.8 34.7 41.9 30.0 40.8 47.3 33.0 46.5 50.5
kW 7.03 6.87 6.65 7.07 6.96 6.82 7.13 7.03 6.96
PERFORMANCE DATA — 548F
COOLING CAPACITIES
Indoor Entering Air — Cfm/BF
900/0.10 1200/0.15 1500/0.21
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62
Indoor Entering Air — Cfm/BF
1200/0.11 1600/0.15 2000/0.22
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62
Indoor Entering Air — Cfm/BF
1500/0.05 2000/0.08 2500/0.14
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62
LEGEND
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
Ldb — Leaving Dry-Bulb
Lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity
TC — Total Capacity (1000 Btuh) Gross
NOTES:
(1000 Btuh) Gross
1. Direct interpolation is permissib le. Do
not extrapolate.
2. The following formulas may be used:
t
ldb=tedb
t
= Wet-bulb temperature corre-
lwb
h
= h
lwb
Where: h
ing evaporator coil
3. The SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor
x cfm) from SHC.
Above 80 F edb, add (corr factor x
sensible capacity (Btuh)
–
sponding to enthalpy of air
leaving indoor coil (h
–
ewb
ewb
1.10 x cfm
)
lwb
total capacity (Btuh)
4.5 x cfm
= Enthalpy of air enter-
cfm) to SHC.
21
PERFORMANCE DATA — 548F (cont)
548F
COOLING CAPACITIES (cont)
548F072 (6 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
TC 81.1 77.6 72.1 84.0 80.3 75.2 84.2 81.1 77.8
75
SHC 36.2 46.9 57.0 39.1 52.4 65.4 40.8 56.2 72.2
kW 5.16 5.11 5.01 5.23 5.16 5.06 5.23 5.17 5.11
TC 80.7 75.8 70.0 83.9 79.3 73.4 84.1 80.8 76.2
85
SHC 36.1 46.5 56.4 39.7 52.9 65.2 41.6 58.3 71.9
kW 5.83 5.74 5.65 5.90 5.81 5.69 5.90 5.84 5.76
TC 79.3 73.0 67.3 82.0 76.7 70.8 83.0 79.1 73.5
95
SHC 35.8 45.4 55.3 39.3 52.3 64.3 42.2 58.9 69.7
kW 6.54 6.37 6.28 6.60 6.47 6.37 6.62 6.55 6.40
105
TC 76.0 70.6 64.3 79.6 73.4 67.9 80.7 75.5 71.3
SHC 34.6 44.8 54.1 38.8 51.2 62.9 42.0 57.6 67.8
1800/0.10 2400/0.13 3000/0.19
72 67 62 72 67 62 72 67 62
kW 7.21 7.12 6.94 7.34 7.15 7.06 7.36 7.22 7.14
115
TC 72.7 67.5 61.1 75.8 70.6 64.7 77.9 71.8 68.5
SHC 33.6 43.7 52.7 37.6 50.7 60.9 41.5 56.4 65.2
kW 7.95 7.86 7.63 8.06 7.95 7.77 8.14 7.94 7.90
125
TC 70.1 63.9 57.6 71.8 66.9 61.6 73.5 68.6 65.4
SHC 32.9 42.4 51.2 36.4 49.5 58.4 40.2 56.1 62.3
kW 8.82 8.62 8.37 8.83 8.73 8.54 8.89 8.79 8.69
548F090 (71/2 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
TC 109.8 101.4 92.2 116.2 107.0 98.0 117.6 108.8 100.2 118.8 110.4 102.4
75
SHC 44.2 57.4 69.4 49.6 66.0 82.0 51.8 69.8 87.0 54.0 74.0 92.0
2250/0.04 3000/0.06 3200/0.08 3750/0.11
72 67 62 72 67 62 72 67 62 72 67 62
kW 6.66 6.44 6.18 6.86 6.60 6.36 6.92 6.66 6.42 6.94 6.70 6.48
TC 105.2 96.4 87.0 111.4 102.2 92.6 113.0 104.0 95.0 114.6 105.8 97.6
85
SHC 42.8 55.6 67.6 48.4 65.0 80.0 50.8 69.0 84.4 53.4 73.8 88.8
kW 7.20 6.94 6.64 7.42 7.14 6.82 7.48 7.20 6.90 7.54 7.28 7.00
TC 100.6 91.0 82.0 105.6 96.2 87.4 107.2 98.0 89.8 108.6 99.6 92.8
95
SHC 41.6 54.0 65.8 47.0 63.2 77.8 49.4 67.4 81.4 52.0 72.2 84.6
kW 7.78 7.42 7.08 7.96 7.62 7.30 8.00 7.70 7.40 8.06 7.76 7.50
TC 94.8 85.4 76.8 99.8 90.2 82.2 101.4 91.6 85.0 103.2 93.2 88.0
105
SHC 40.0 52.2 63.8 45.6 61.6 74.6 48.2 65.8 77.6 51.2 70.4 80.4
kW 8.26 7.88 7.50 8.48 8.10 7.76 8.56 8.18 7.88 8.64 8.24 8.02
TC 88.8 79.9 71.4 93.4 84.0 77.6 94.8 85.4 80.0 96.0 86.6 83.0
115
SHC 38.4 50.4 61.6 44.2 59.8 70.6 46.6 64.0 73.2 49.4 68.6 75.8
kW 8.76 8.32 7.90 8.98 8.54 8.22 9.04 8.62 8.36 9.10 8.70 8.50
TC 82.6 73.8 65.8 86.6 77.4 74.4 88.0 78.8 75.0 89.2 80.0 77.6
125
SHC 36.8 48.6 59.2 42.2 57.8 66.2 45.2 62.0 68.6 48.2 66.6 71.0
kW 9.20 8.74 8.30 9.44 8.96 8.68 9.52 9.02 8.82 9.60 9.12 8.98
Indoor Entering Air — Cfm/BF
Indoor Entering Air — Ewb (F)
Indoor Entering Air — Cfm/BF
Indoor Entering Air — Ewb (F)
LEGEND
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
Ldb — Leaving Dry-Bulb
Lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity
TC — Total Capacity (1000 Btuh) Gross
NOTES:
(1000 Btuh) Gross
1. Direct interpola tion is permissible. Do
not extrapolate.
2. The following formulas may be used:
t
ldb=tedb
t
= Wet-bulb temperature corre-
lwb
h
= h
lwb
Where: h
ing evaporator coil
3. The SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor
x cfm) from SHC.
Above 80 F edb, add (corr factor x
sensible capacity (Btuh)
–
sponding to enthalpy of air
leaving indoor coil (h
–
ewb
ewb
1.10 x cfm
)
lwb
total capacity (Btuh)
4.5 x cfm
= Enthalpy of air enter-
cfm) to SHC.
22
PERFORMANCE DATA — 548F (cont)
548F
548F120 (10 TONS)
Temp (F)
Outdoor
Entering Air
(Edb)
75
85
95
105
115
125
TC 127.4 120.4 110.6 134.2 126.2 116.2 135.6 127.4 117.8 137.0 129.0 120.6
SHC 60.0 76.4 91.0 66.2 86.0 104.4 67.8 89.0 108.8 70.2 93.4 115.6
kW 8.30 8.18 7.88 8.54 8.34 8.04 8.60 8.36 8.10 8.64 8.38 8.20
TC 124.6 116.2 106.4 131.0 122.0 112.4 132.4 123.6 114.0 133.8 126.0 116.4
SHC 59.2 74.6 89.4 65.4 84.8 103.6 67.4 88.4 107.4 70.0 94.2 112.8
kW 9.24 9.04 8.74 9.50 9.24 8.98 9.54 9.28 9.02 9.60 9.36 9.08
TC 121.8 112.0 102.2 126.2 117.4 107.4 127.8 119.0 109.4 130.0 121.2 112.6
SHC 58.4 73.2 87.4 63.8 83.4 101.0 66.0 87.2 104.8 69.6 93.4 110.2
kW 10.34 10.04 9.66 10.46 10.18 9.90 10.52 10.26 9.96 10.62 10.36 10.08
TC 116.9 107.2 97.6 122.4 112.4 102.8 123.6 113.8 105.0 124.6 115.6 108.4
SHC 56.6 71.4 85.4 63.0 82.0 98.4 65.0 85.8 101.8 67.8 91.4 106.2
kW 11.38 11.08 10.66 11.64 11.28 10.90 11.68 11.32 11.00 11.68 11.38 11.16
TC 112.0 102.0 92.8 116.6 107.0 98.0 118.0 108.2 100.2 120.0 110.0 103.8
SHC 55.0 69.6 83.2 61.2 80.2 95.2 63.6 84.2 98.0 67.4 90.2 101.8
kW 12.58 12.18 11.74 12.78 11.42 12.00 12.84 12.48 12.12 12.96 12.56 12.30
TC 106.4 96.8 87.8 110.4 101.2 93.6 111.6 102.2 95.8 113.6 103.8 99.0
SHC 53.2 67.4 80.8 59.2 78.4 91.4 61.4 82.2 94.0 65.4 88.0 97.2
kW 13.84 13.36 12.90 13.96 13.62 13.22 14.02 13.68 13.34 14.14 13.76 13.54
LEGEND
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
Ldb — Leaving Dry-Bulb
Lwb — Leaving Wet-Bulb
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC — Total Capacity (1000 Btuh) Gross
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
ldb=tedb
sensible capacity (Btuh)
–
1.10 x cfm
2800/0.11 3750/0.16 4100/0.18 4700/0.21
72 67 62 72 67 62 72 67 62 72 67 62
COOLING CAPACITIES (cont)
Indoor Entering Air — Cfm/BF
Indoor Entering Air — Ewb (F)
t
= Wet-bulb temperature corresponding to enthalpy of air leav-
lwb
ing indoor coil (h
h
= h
lwb
Where: h
3. The SHC is based on 80 F edb temperature of air entering indoor
coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
)
lwb
total capacity (Btuh)
–
ewb
ewb
4.5 x cfm
= Enthalpy of air entering evaporator coil
INSTANTANEOUS AND INTEGRATED HEATING RATINGS
548F036
Return
Air
(F db)
55
70
80
LEGEND NOTES:
Cap. — Heating Capacity (1000 Btuh) (includes indoor-fan motor heat)
db — dry bulb
kW — Total Power Input (includes compressor motor power input,
Cfm
(Standard
Air)
900
1200
1500
900
1200
1500
900
1200
1500
Cap. 15.4
kW 2.25 2.44 2.57 2.86 3.10 3.29 3.38 3.64
Cap. 15.9
kW 2.24 2.40 2.54 2.80 3.02 3.15 3.21 3.35
Cap. 16.2
kW 2.23 2.38 2.52 2.76 2.94 3.03 3.08 3.17
Cap. 13.2
kW 2.29 2.50 2.67 2.98 3.24 3.45 3.55 3.91
Cap. 13.7
kW 2.28 2.49 2.62 2.93 3.17 3.36 3.45 3.72
Cap. 14.0
kW 2.27 2.47 2.60 2.89 3.12 3.30 3.38 3.54
Cap. 11.5
kW 2.30 2.54 2.71 3.04 3.32 3.55 3.65 4.03
Cap. 12.0
kW 2.30 2.52 2.69 2.99 3.26 3.47 3.56 3.91
Cap. 12.3
kW 2.29 2.51 2.68 2.97 3.22 3.41 3.50 3.70
0 10173040475060
13.1 19.2 17.6 21.7 19.8 27.4 24.0 31.9 31.9 35.3 35.3 36.9 36.9 41.4 41.4
13.5 19.4 17.8 22.5 20.5 28.3 24.8 32.9 32.9 35.8 35.8 37.0 37.0 40.1 40.1
13.8 19.8 18.2 22.9 20.9 28.8 25.2 33.1 33.1 35.3 35.3 36.5 36.5 38.6 38.6
11.2 17.1 15.7 20.0 18.2 25.4 22.2 29.8 29.8 33.2 33.2 34.7 34.7 40.1 40.1
11.6 17.7 16.3 20.3 18.5 26.3 23.1 30.8 30.8 34.4 34.4 36.0 36.0 40.9 40.9
11.9 18.1 16.6 20.7 18.9 26.9 23.6 31.6 31.6 35.1 35.1 36.9 36.9 40.2 40.2
9.8 15.5 14.2 18.4 16.8 23.7 20.8 28.1 28.1 31.7 31.7 33.2 33.2 38.5 38.5
10.2 16.2 14.8 19.2 17.5 24.7 21.6 29.3 29.3 33.0 33.0 34.5 34.5 40.2 40.2
10.5 16.6 15.2 19.7 18.0 25.4 22.3 30.1 30.1 33.7 33.7 35.3 35.3 39.2 39.2
outdoor-fan motor input, and indoor-fan motor input)
Air Temperature Entering Outdoor Coil (F)
1. indicates integrated ratings.
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.
23
548F048
548F
Return
Air
(F db)
55
70
80
PERFORMANCE DATA — 548F (cont)
INSTANTANEOUS AND INTEGRATED HEATING RATINGS (cont)
Cfm
(Standard
Air)
Cap. 22.7
1200
kW 2.91 3.14 3.35 3.77 4.12 4.40 4.54 5.04
Cap. 23.1
1600
kW 2.87 3.09 3.28 3.66 3.97 4.23 4.34 4.80
Cap. 23.4
2000
kW 2.85 3.05 3.23 3.59 3.88 4.11 4.23 4.65
Cap. 20.6
1200
kW 3.00 3.33 3.52 4.01 4.39 4.71 4.85 5.40
Cap. 21.2
1600
kW 2.99 3.25 3.47 3.90 4.25 4.54 4.67 5.15
Cap. 21.6
2000
kW 2.97 3.22 3.43 3.84 4.16 4.42 4.55 5.00
Cap. 18.6
1200
kW 3.01 3.40 3.62 4.15 4.56 4.90 5.06 5.63
Cap. 19.4
1600
kW 3.01 3.37 3.58 4.06 4.43 4.74 4.88 5.39
Cap. 19.8
2000
kW 3.01 3.35 3.54 4.00 4.35 4.63 4.76 5.24
0 10173040475060
19.3 26.6 24.4 30.2 27.6 37.4 32.7 43.1 43.1 47.6 47.6 49.8 49.8 57.2 57.2
19.7 27.2 25.0 30.8 28.1 38.2 33.5 44.1 44.1 48.9 48.9 51.1 51.1 59.0 59.0
19.9 27.4 25.2 31.2 28.4 38.7 33.9 44.8 44.8 49.7 49.7 52.0 52.0 60.2 60.2
17.5 25.5 23.4 28.4 25.9 35.6 31.2 41.0 41.0 45.5 45.5 47.5 47.5 54.9 54.9
18.0 25.6 23.5 29.1 26.6 36.3 31.8 42.1 42.1 46.8 46.8 48.9 48.9 56.5 56.5
18.3 25.9 23.8 29.5 26.9 36.9 32.3 42.8 42.8 47.5 47.5 49.7 49.7 57.6 57.6
15.8 23.9 21.9 27.1 24.7 34.2 29.9 39.7 39.7 44.1 44.1 46.1 46.1 53.2 53.2
16.4 24.7 22.6 27.8 25.4 35.1 30.8 40.7 40.7 45.3 45.3 47.3 47.3 54.9 54.9
16.8 25.1 23.1 28.2 25.7 35.7 31.3 41.5 41.5 46.0 46.0 48.2 48.2 55.8 55.8
Air Temperature Entering Outdoor Coil (F)
548F060
Return
Air
(F db)
55
70
80
LEGEND NOTES:
Cap. — Heating Capacity (1000 Btuh) (includes indoor-fan motor heat)
db — dry bulb
kW — Total Power Input (includes compressor motor power input,
Cfm
(Standard
Air)
Cap. 29.7
1500
kW 3.96 4.14 4.30 4.62 4.90 5.14 5.25 5.67
Cap. 29.8
2000
kW 3.83 3.98 4.12 4.38 4.63 4.82 4.91 5.25
Cap. 29.8
2500
kW 3.76 3.89 4.01 4.26 4.47 4.63 4.72 4.99
Cap. 28.7
1500
kW 4.43 4.66 4.84 5.21 5.53 5.79 5.91 6.39
Cap. 29.0
2000
kW 4.30 4.48 4.63 4.94 5.20 5.41 5.52 5.91
Cap. 29.2
2500
kW 4.22 4.38 4.51 4.78 5.01 5.21 5.30 5.63
Cap. 28.1
1500
kW 4.77 5.03 5.23 5.64 5.99 6.27 6.41 6.92
Cap. 28.4
2000
kW 4.63 4.84 5.01 5.34 5.63 5.86 5.97 6.39
Cap. 28.6
2500
kW 4.55 4.73 4.88 5.17 5.42 5.62 5.72 6.09
outdoor-fan motor input, and indoor-fan motor input)
0 10173040475060
25.2 34.5 31.7 38.4 35.0 46.0 40.3 52.4 52.4 57.2 57.2 59.6 59.6 67.9 67.9
25.4 34.7 31.8 38.6 35.2 46.3 40.6 52.9 52.9 57.7 57.7 60.1 60.1 68.7 68.7
25.4 34.8 31.9 38.7 35.3 46.6 40.8 53.1 53.1 58.0 58.0 60.4 60.4 68.4 68.4
24.4 33.8 31.0 37.8 34.4 45.4 39.8 51.5 51.5 56.2 56.2 58.4 58.4 66.5 66.5
24.7 34.0 31.2 38.0 34.7 45.7 40.1 51.9 51.9 56.7 56.7 59.0 59.0 67.4 67.4
24.8 34.2 31.4 38.2 34.8 45.8 40.2 52.2 52.2 57.1 57.1 59.4 59.4 67.9 67.9
23.8 33.1 30.4 37.2 33.9 44.9 39.3 51.0 51.0 55.6 55.6 57.8 57.8 65.7 65.7
24.2 33.5 30.7 37.6 34.2 45.3 39.7 51.4 51.4 56.1 56.1 58.3 58.3 66.5 66.5
24.3 33.7 30.9 37.7 34.4 45.5 39.8 51.6 51.6 56.4 56.4 58.7 58.7 67.0 67.0
Air Temperature Entering Outdoor Coil (F)
1. indicates integrated ratings.
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.
24
548F072
548F
Return
Air
(F db)
55
70
80
Cfm
(Standard
Air)
1800
2400
3000
1800
2400
3000
1800
2400
3000
PERFORMANCE DATA — 548F (cont)
INSTANTANEOUS AND INTEGRATED HEATING RATINGS (cont)
Air Temperature Entering Outdoor Coil (F)
0 10173040475060
Cap. 37.8
kW 4.72 4.97 5.16 5.58 5.96 6.25 6.40 6.95
Cap. 37.9
kW 4.55 4.76 4.92 5.28 5.57 5.81 5.93 6.38
Cap. 38.0
kW 4.46 4.64 4.78 5.09 5.35 5.56 5.67 6.07
Cap. 37.3
kW 5.32 5.61 5.84 6.33 6.75 7.10 7.27 7.91
Cap. 37.5
kW 5.13 5.38 5.57 5.97 6.32 6.61 6.74 7.25
Cap. 37.6
kW 5.03 5.25 5.41 5.76 6.08 6.32 6.44 6.89
Cap. 36.8
kW 5.75 6.09 6.34 6.88 7.35 7.72 7.90 8.58
Cap. 37.0
kW 5.55 5.83 6.04 6.49 6.87 7.18 7.33 7.89
Cap. 37.1
kW 5.44 5.68 5.87 6.26 6.60 6.88 7.01 7.49
32.2 43.9 40.3 48.3 44.1 58.0 50.8 66.2 66.2 72.3 72.3 75.2 75.2 86.0 86.0
32.2 44.0 40.4 48.5 44.2 58.4 51.2 66.6 66.6 72.8 72.8 75.9 75.9 87.0 87.0
32.3 44.0 40.4 48.5 44.3 58.5 51.3 66.9 66.9 73.1 73.1 76.2 76.2 87.5 87.5
31.7 43.6 40.0 48.1 43.9 57.5 50.4 65.2 65.2 71.1 71.1 74.0 74.0 84.6 84.6
31.9 43.8 40.2 48.2 43.9 57.7 50.5 65.6 65.6 71.8 71.8 74.7 74.7 85.4 85.4
32.0 43.9 40.3 48.3 44.0 57.8 50.7 66.0 66.0 72.1 72.1 75.0 75.0 86.0 86.0
31.3 43.1 39.6 47.9 43.7 57.1 50.1 64.8 64.8 70.5 70.5 73.4 73.4 83.6 83.6
31.4 43.4 39.8 48.0 43.8 57.4 50.3 65.1 65.1 71.1 71.1 73.9 73.9 84.5 84.5
31.5 43.5 39.9 48.1 43.9 57.5 50.4 65.3 65.3 71.5 71.5 74.4 74.4 85.0 85.0
548F090
Return
Air
(F db)
55
70
80
LEGEND NOTES:
Cap. — Heating Capacity (1000 Btuh) (includes indoor-fan motor heat)
db — dry bulb
kW — Total Power Input (includes compressor motor power input,
Cfm
(Standard
Air)
2000
2600
3200
2000
2600
3200
2000
2600
3200
outdoor-fan motor input, and indoor-fan motor input)
Cap. 36.6
kW 5.24 5.64 5.94 6.58 7.08 7.50 7.68 8.32
Cap. 37.6
kW 5.18 5.56 5.82 6.40 6.84 7.20 7.36 7.78
Cap. 38.2
kW 5.16 5.50 5.74 6.28 6.70 7.02 7.12 7.40
Cap. 32.4
kW 5.42 5.90 6.22 6.92 7.48 7.94 8.16 8.90
Cap. 33.4
kW 5.38 5.82 6.12 6.76 7.28 7.68 7.86 8.48
Cap. 34.2
kW 5.36 5.76 6.06 6.66 7.14 7.50 7.68 8.16
Cap. 29.2
kW 5.52 6.02 6.40 7.12 7.72 8.22 8.44 9.24
Cap. 30.2
kW 5.48 5.96 6.30 6.98 7.54 7.98 8.18 8.88
Cap. 31.0
kW 5.46 5.92 6.24 6.90 7.42 7.82 8.00 8.58
0 10173040475060
31.2 44.0 40.4 49.8 45.4 61.4 53.8 70.4 70.4 77.4 77.4 80.6 80.6 91.8 91.8
32.0 45.2 41.4 51.2 46.6 63.0 55.2 72.4 72.4 79.6 79.6 83.0 83.0 92.4 92.4
32.4 45.8 42.0 51.8 47.2 63.8 55.8 73.6 73.6 81.0 81.0 83.8 83.8 91.2 91.2
27.6 40.4 37.2 46.0 41.8 57.8 50.6 66.8 66.8 73.6 73.6 76.6 76.6 87.8 87.8
28.4 41.8 38.2 47.4 43.2 59.6 52.2 68.8 68.8 75.8 75.8 79.0 79.0 90.4 90.4
29.0 42.2 38.6 48.4 44.0 60.6 53.0 70.0 70.0 77.2 77.2 80.6 80.6 91.0 91.0
24.8 37.4 34.4 43.4 39.6 54.8 48.0 64.0 64.0 70.8 70.8 73.8 73.8 84.8 84.8
25.8 38.8 35.6 44.6 40.6 56.8 49.8 66.2 66.2 73.2 73.2 76.4 76.4 87.8 87.8
26.4 39.6 36.4 45.4 41.4 58.0 50.8 67.4 67.4 74.6 74.6 78.0 78.0 89.0 89.0
Air Temperature Entering Outdoor Coil (F)
1. indicates integrated ratings.
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.
25
PERFORMANCE DATA — 548F (cont)
548F
INSTANTANEOUS AND INTEGRATED HEATING RATINGS (cont)
548F120
Return
Air
(F db)
55
70
80
LEGEND NOTES:
Cap. — Heating Capacity (1000 Btuh) (includes indoor-fan motor heat)
db — dry bulb
kW — Total Power Input (includes compressor motor power input,
Cfm
(Standard
Air)
Cap. 52.2
2650
kW 7.20 7.58 7.86 8.46 9.00 9.42 9.62 10.38
Cap. 52.7
3500
kW 6.98 7.30 7.52 8.02 8.46 8.80 8.96 9.62
Cap. 53.2
4100
kW 6.88 7.16 7.38 7.82 8.22 8.54 8.68 9.28
Cap. 53.2
4400
kW 6.84 7.12 7.32 7.74 8.14 8.44 8.58 9.14
Cap. 49.8
2650
kW 8.08 8.50 8.86 9.56 10.14 10.62 10.86 11.72
Cap. 50.6
3500
kW 7.86 8.20 8.50 9.04 9.52 9.92 10.10 10.80
Cap. 51.0
4100
kW 7.74 8.06 8.32 8.82 9.26 9.62 9.78 10.40
Cap. 51.0
4400
kW 7.70 8.02 8.26 8.74 9.16 9.50 9.66 10.26
Cap. 47.6
2650
kW 8.72 9.20 9.56 10.36 11.00 11.52 11.76 12.70
Cap. 48.6
3500
kW 8.48 8.88 9.18 9.82 10.34 10.74 10.96 11.70
Cap. 49.0
4100
kW 8.36 8.72 9.02 9.58 10.04 10.42 10.60 11.28
Cap. 49.2
4400
kW 8.32 8.66 8.94 9.48 9.92 10.28 10.46 11.10
outdoor-fan motor input, and indoor-fan motor input)
0 10173040475060
44.4 62.2 57.0 69.6 63.4 84.2 73.8 96.0 96.0 104.6 104.6 108.8 108.8 123.6 123.6
44.8 62.8 57.6 70.2 64.0 85.0 74.4 96.8 96.8 105.8 105.8 109.8 109.8 125.4 125.4
45.2 63.0 58.0 70.4 64.2 85.2 74.8 97.2 97.2 105.8 105.8 110.2 110.2 126.0 126.0
45.2 63.2 58.0 70.6 64.4 85.4 74.8 97.4 97.4 106.0 106.0 110.4 110.4 126.4 126.4
42.2 59.2 54.4 67.0 61.2 82.0 72.0 94.0 94.0 102.6 102.6 106.8 106.8 121.2 121.2
43.0 60.2 55.2 63.2 62.2 83.2 72.8 95.2 95.2 103.8 103.8 108.0 108.0 122.8 122.8
43.2 60.6 55.6 68.6 62.6 83.6 73.2 95.6 95.6 104.2 104.2 108.4 108.4 123.4 123.4
43.4 60.8 55.8 68.8 62.6 83.8 73.4 95.8 95.8 104.4 104.4 108.6 108.6 123.8 123.8
40.6 57.6 52.8 64.6 58.8 80.2 70.4 92.0 92.0 101.0 101.0 105.2 105.2 119.8 119.8
41.4 58.6 53.8 66.0 60.2 81.6 71.4 93.6 93.6 102.4 102.4 106.6 106.6 121.2 121.2
41.8 58.6 53.8 66.6 60.8 82.0 71.8 94.2 94.2 103.0 103.0 107.2 107.2 121.8 121.8
41.8 58.8 54.0 66.8 61.0 82.2 72.2 94.4 94.4 103.2 103.2 107.4 107.4 122.2 122.2
Air Temperature Entering Outdoor Coil (F)
1. indicates integrated ratings.
2. Integrated capacity is maximum (instantaneous) capacity less the
effect of frost on the outdoor coil and the heat required to defrost it.
26
PERFORMANCE DATA — 548F (cont)
548F
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS
548F036 (3 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow
(Cfm)
900 0.67 0.21 253 0.68 0.23 277 0.69 0.26 307 0.69 0.31 363
1000 0.60 0.23 270 0.61 0.25 292 0.61 0.27 321 0.63 0.32 374
1100 0.55 0.24 287 0.56 0.26 307 0.57 0.28 335 0.58 0.33 385
1200 0.51 0.26 304 0.51 0.27 323 0.52 0.29 349 0.53 0.34 397
1300 0.45 0.27 321 0.46 0.29 338 0.46 0.31 364 0.47 0.34 408
1400 0.38 0.29 338 0.41 0.30 354 0.43 0.32 378 — — —
1500 0.34 0.30 355 0.36 0.31 369 0.38 0.33 392 — — —
Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure (in. wg)
Watts — Input Watts to Motor
548F036 (3 TONS) — ALTERNATE MOTOR AND DRIVE*
Airflow
(Cfm)
900 643 0.15 152 768 0.22 222 870 0.30 296 958 0.37 373 1037 0.46 454
1000 683 0.19 191 804 0.27 268 904 0.35 348 991 0.43 430 1069 0.52 517
1100 725 0.24 237 842 0.32 321 939 0.41 407 1025 0.50 496 1102 0.59 588
1200 767 0.29 291 880 0.38 382 976 0.48 474 1060 0.57 570 1136 0.67 668
1300 811 0.35 352 920 0.45 451 1013 0.55 550 1095 0.66 652 1170 0.76 756
1400 855 0.43 423 960 0.53 529 1051 0.64 636 1132 0.75 744 1205 0.86 855
1500 900 0.51 504 1002 0.62 617 1090 0.74 731 1169 0.85 846 1242 0.97 963
ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts
LEGEND See General Fan Performance notes below.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
208 v 230, 460, 575 v 208 v 230, 460, 575 v
0.2 0.4 0.6 0.8 1.0
Low Speed High Speed
External Static Pressure (in. wg)
548F036 (3 TONS) — ALTERNATE MOTOR AND DRIVE* (cont)
Airflow
(Cfm)
900 1110 0.54 538 1177 0.63 627 1239 0.72 718 1298 0.82 813 1355 0.92 911
1000 1141 0.61 607 1207 0.70 700 1269 0.80 796 1328 0.90 895 1384 1.00 998
1100 1173 0.69 683 1238 0.79 781 1300 0.89 883 1358 0.99 987 ———
1200 1205 0.77 768 1270 0.88 872 1332 0.98 979 ——————
1300 1239 0.87 863 1303 0.98 972 —————————
1400 1273 0.97 967 ————————————
1500 ———————————————
LEGEND
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 760 to 1000 rpm. All other rpms require a field-
supplied drive.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1.2 1.4 1.6 1.8 2.0
External Static Pressure (in. wg)
See General Fan Performance notes below.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 1.00.
GENERAL FAN PERFORMANCE NOTES
1. 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 wattage 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
Indoor Fan Motor Performance table on page 54.
2. Values include losses for filters, unit casing, and wet coils. See
Accessory/FIOP Static Pressure tables on page 50 for accessory
static pressure information.
3. Use of a field-supplied motor may affect wire sizing. Contact your
Bryant representative for details.
4. Interpolation is permissible. Do not extrapolate.
27
PERFORMANCE DATA — 548F (cont)
548F
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
548F036 (3 TONS) — HIGH-STATIC MOTOR AND DRIVE*
Airflow
(Cfm)
900 643 0.15 152 768 0.22 222 870 0.30 296 958 0.37 373 1037 0.46 454
1000 683 0.19 191 804 0.27 268 904 0.35 348 991 0.43 430 1069 0.52 517
1100 725 0.24 237 842 0.32 321 939 0.41 407 1025 0.50 496 1102 0.59 588
1200 767 0.29 291 880 0.38 382 976 0.48 474 1060 0.57 570 1136 0.67 668
1300 811 0.35 352 920 0.45 451 1013 0.55 550 1095 0.66 652 1170 0.76 756
1400 855 0.43 423 960 0.53 529 1051 0.64 636 1132 0.75 744 1205 0.86 855
1500 900 0.51 504 1002 0.62 617 1090 0.74 731 1169 0.85 846 1242 0.97 963
548F036 (3 TONS) — HIGH-STATIC MOTOR AND DRIVE* (cont)
Airflow
(Cfm)
900 1110 0.54 538 1177 0.63 627 1239 0.72 718 1298 0.82 813 1355 0.92 911
1000 1141 0.61 607 1207 0.70 700 1269 0.80 796 1328 0.90 895 1384 1.00 998
1100 1173 0.69 683 1238 0.79 781 1300 0.89 883 1358 0.99 987 1414 1.10 1094
1200 1205 0.77 768 1270 0.88 872 1332 0.98 979 1389 1.09 1088 1444 1.21 1200
1300 1239 0.87 863 1303 0.98 972 1364 1.09 1084 1421 1.21 1199 1475 1.32 1316
1400 1273 0.97 967 1337 1.09 1082 1397 1.21 1200 1453 1.33 1320 1507 1.45 1443
1500 1309 1.09 1082 1371 1.21 1204 1430 1.33 1327 1486 1.46 1453 1540 1.59 1581
LEGEND
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 1075 to 1455 rpm. All other rpms require a field-
supplied drive.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
0.2 0.4 0.6 0.8 1.0
1.2 1.4 1.6 1.8 2.0
External Static Pressure (in. wg)
External Static Pressure (in. wg)
See General Fan Performance notes on page 27.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.
548F048 (4 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow
(Cfm)
1200 0.93 0.41 458 0.94 0.45 506 0.94 0.51 572 0.99 0.56 632
1300 0.86 0.42 471 0.87 0.46 521 0.87 0.52 589 0.92 0.58 651
1400 0.78 0.45 503 0.79 0.49 556 0.79 0.54 616 0.87 0.60 681
1500 0.70 0.47 536 0.73 0.52 593 0.73 0.56 631 0.80 0.62 698
1600 0.61 0.49 557 0.64 0.54 616 0.66 0.58 654 0.76 0.64 723
1700 0.51 0.52 584 0.54 0.57 646 0.58 0.60 678 0.68 0.66 750
1800 0.40 0.54 610 0.44 0.60 674 0.51 0.62 698 0.63 0.68 772
1900 0.29 0.56 629 0.37 0.62 696 0.46 0.64 720 0.56 0.70 796
2000 0.25 0.58 651 0.30 0.64 720 0.39 0.66 744 0.50 0.73 823
Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure (in. wg)
Watts — Input Watts to Motor
ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts
LEGEND See General Fan Performance notes on page 27.
208 v 230, 460, 575 v 208 v 230, 460, 575 v
Low Speed High Speed
28
PERFORMANCE DATA — 548F (cont)
548F
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
548F048 (4 TONS) — ALTERNATE MOTOR AND DRIVE*
Airflow
(Cfm)
1200 767 0.29 291 880 0.38 382 976 0.48 474 1060 0.57 570 1136 0.67 668
1300 811 0.35 352 920 0.45 451 1013 0.55 550 1095 0.66 652 1170 0.76 756
1400 855 0.43 423 960 0.53 529 1051 0.64 636 1132 0.75 744 1205 0.86 855
1500 900 0.51 504 1002 0.62 617 1090 0.74 731 1169 0.85 846 1242 0.97 963
1600 945 0.60 594 1044 0.72 716 1130 0.84 837 1207 0.96 959 ———
1700 991 0.70 696 1086 0.83 825 1170 0.96 954 ——————
1800 10380.8181011300.95947—————————
1900 10850.94936————————————
2000 ———————————————
548F048 (4 TONS) — ALTERNATE MOTOR AND DRIVE* (cont)
Airflow
(Cfm)
1200 1205 0.77 768 1270 0.88 872 1332 0.98 979 ——————
1300 1239 0.87 863 1303 0.98 972 —————————
1400 1273 0.97 967 ————————————
1500 ———————————————
1600 ———————————————
1700 ———————————————
1800 ———————————————
1900 ———————————————
2000 ———————————————
LEGEND
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 770 to 1175 rpm. All other rpms require a field-
supplied drive.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
0.2 0.4 0.6 0.8 1.0
1.2 1.4 1.6 1.8 2.0
External Static Pressure (in. wg)
External Static Pressure (in. wg)
See General Fan Performance notes on page 27.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 1.00.
548F048 (4 TONS) — HIGH-STATIC MOTOR AND DRIVE*
Airflow
(Cfm)
1200 767 0.29 291 880 0.38 382 976 0.48 474 1060 0.57 570 1136 0.67 668
1300 811 0.35 352 920 0.45 451 1013 0.55 550 1095 0.66 652 1170 0.76 756
1400 855 0.43 423 960 0.53 529 1051 0.64 636 1132 0.75 744 1205 0.86 855
1500 900 0.51 504 1002 0.62 617 1090 0.74 731 1169 0.85 846 1242 0.97 963
1600 945 0.60 594 1044 0.72 716 1130 0.84 837 1207 0.96 959 1278 1.09 1083
1700 991 0.70 696 1086 0.83 825 1170 0.96 954 1246 1.09 1083 1316 1.22 1214
1800 1038 0.81 810 1130 0.95 947 1211 1.09 1083 1286 1.23 1219 1354 1.36 1357
1900 1085 0.94 936 1174 1.09 1081 1253 1.23 1224 1326 1.38 1368 1393 1.52 1513
2000 1132 1.08 1075 1218 1.23 1228 1296 1.39 1379 1367 1.54 1531 1432 1.69 1682
548F048 (4 TONS) — HIGH-STATIC MOTOR AND DRIVE* (cont)
Airflow
(Cfm)
1200 1205 0.77 768 1270 0.88 872 1332 0.98 979 1389 1.09 1088 1444 1.21 1200
1300 1239 0.87 863 1303 0.98 972 1364 1.09 1084 1421 1.21 1199 1475 1.32 1316
1400 1273 0.97 967 1337 1.09 1082 1397 1.21 1200 1453 1.33 1320 1507 1.45 1443
1500 1309 1.09 1082 1371 1.21 1204 1430 1.33 1327 1486 1.46 1453 1540 1.59 1581
1600 1344 1.21 1208 1406 1.34 1336 1465 1.47 1465 1520 1.61 1597 1573 1.74 1731
1700 1381 1.35 1346 1442 1.49 1480 1500 1.62 1616 1555 1.76 1753 1607 1.90 1893
1800 1418 1.50 1496 1478 1.64 1636 1535 1.79 1778 1589 1.93 1922 1641 2.08 2068
1900 1456 1.67 1658 1515 1.82 1806 1571 1.96 1954 1625 2.12 2104 1676 2.27 2256
2000 1494 1.84 1835 1553 2.00 1989 1608 2.16 2144 1661 2.31 2301 ———
LEGEND
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 1075 to 1455 rpm. All other rpms require a field-
supplied drive.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
0.2 0.4 0.6 0.8 1.0
1.2 1.4 1.6 1.8 2.0
External Static Pressure (in. wg)
External Static Pressure (in. wg)
See General Fan Performance notes on page 27.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.
29
PERFORMANCE DATA — 548F (cont)
548F
FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont)
548F060 (5 TONS) — STANDARD MOTOR (DIRECT DRIVE)
Airflow
(Cfm)
1500 0.88 0.67 750 1.20 0.71 791 1.19 0.70 782 1.36 0.76 845 1.38 0.79 875 1.44 0.85 949
1600 0.68 0.70 780 1.04 0.74 824 1.04 0.74 821 1.22 0.79 883 1.25 0.82 913 1.33 0.89 988
1700 0.51 0.73 810 0.89 0.77 857 0.89 0.77 861 1.09 0.83 921 1.13 0.85 950 1.22 0.92 1027
1800 0.35 0.75 839 0.73 0.80 891 0.74 0.81 900 0.96 0.86 959 1.00 0.89 988 1.11 0.96 1066
1900 0.26 0.78 873 0.58 0.83 924 0.59 0.84 940 0.86 0.90 997 0.88 0.92 1025 1.00 0.99 1105
2000 0.18 0.81 905 0.42 0.86 957 0.44 0.88 979 0.73 0.93 1035 0.78 0.95 1063 0.92 1.03 1144
2100 0.08 0.84 940 0.27 0.89 990 0.29 0.91 1018 0.59 0.96 1073 0.63 0.99 1101 0.81 1.06 1183
2200 — — — 0.19 0.92 1023 0.19 0.93 1035 0.46 1.00 1111 0.49 1.02 1138 0.69 1.10 1222
2300 — — — 0.11 0.95 1056 0.11 0.97 1076 0.34 1.03 1149 0.41 1.06 1176 0.59 1.13 1261
2400 — — — 0.03 0.98 1096 0.04 1.00 1113 0.19 1.07 1187 0.22 1.09 1213 0.43 1.17 1300
2500 — — — — — — — — — 0.09 1.1 0 1225 0.12 1.12 1251 0.34 1.20 1340
Bhp — Brake Horsepower Input to Fan
ESP — External Static Pressure (in. wg)
Watts — Input Watts to Motor
548F060 (5 TONS) — ALTERNATE MOTOR AND BELT DRIVE*
Airflow
(Cfm)
1500 807 0.42 369 913 0.56 489 1011 0.71 621 1103 0.87 766 1188 1.05 923
1600 847 0.49 432 948 0.63 557 1042 0.79 694 1130 0.96 843 1213 1.14 1003
1700 887 0.57 501 983 0.72 632 1073 0.88 774 1158 1.06 928 1239 1.24 1092
1800 928 0.66 579 1020 0.82 715 1106 0.98 863 1188 1.16 1021 1266 1.35 1189
1900 969 0.76 666 1057 0.92 808 1140 1.09 960 1219 1.28 1123 1295 1.48 1296
2000 1010 0.87 761 1095 1.04 909 1175 1.21 1066 1251 1.41 1234 1325 1.61 1411
2100 1052 0.99 866 1133 1.16 1019 1211 1.35 1182 1285 1.54 1355 1355 1.75 1537
2200 1095 1.12 981 1173 1.30 1140 1247 1.49 1308 1319 1.69 1486 1387 1.91 1673
2300 1137 1.26 1105 1212 1.45 1271 1284 1.65 1445 1353 1.85 1628 1420 2.07 1820
2400 1180 1.41 1241 1252 1.61 1412 1322 1.81 1592 1389 2.03 1781 1454 2.25 1977
2500 1223 1.58 1388 1293 1.78 1565 1360 1.99 1751 1425 2.22 1945 ———
ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts
LEGEND See General Fan Performance notes on page 27.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
Low Speed Medium Speed High Speed
208 v 230, 460, 575 v 208 v 230, 460, 575 v 208 v 230, 460, 575 v
External Static Pressure (in. wg)
0.2 0.4 0.6 0.8 1.0
548F060 (5 TONS) — ALTERNATE MOTOR AND BELT DRIVE* (cont)
Airflow
(Cfm)
1500 1270 1.24 1091 1347 1.45 1269 1421 1.66 1458 1492 1.89 1657 1561 2.13 1865
1600 1292 1.34 1174 1367 1.54 1356 1440 1.76 1547 1509 1.99 1748 1576 2.23 1959
1700 1315 1.44 1267 1389 1.65 1451 1459 1.88 1646 1527 2.11 1849 1593 2.35 2062
1800 1341 1.56 1368 1412 1.77 1556 1481 2.00 1753 1547 2.23 1960 ———
1900 1367 1.68 1478 1437 1.90 1670 1504 2.13 1871 1569 2.37 2080 ———
2000 1395 1.82 1598 1463 2.04 1794 1528 2.28 1998 ——————
2100 1424 1.97 1728 1490 2.20 1928 —————————
2200 1454 2.13 1869 1518 2.36 2073 —————————
2300 1485 2.30 2020 ————————————
2400 ———————————————
2500 ———————————————
LEGEND
Bhp — Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 878 to 1192 rpm. All other rpms require a field-
supplied drive.
Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1.2 1.4 1.6 1.8 2.0
External Static Pressure (in. wg)
See General Fan Performance notes on page 27.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 1.30 for single-phase units and 2.40
for three-phase units.
30
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