This product has been design ed and m anufactured to
meet En ergy St ar® criteria for energy effici ency.
However, proper ref rigerant charge an d proper air flow
are critical to achieve rated capacity and efficiency.
Installation of this product should follow all
manufacturer’s refrigerant charging and air flow
instructions. Failure to con firm proper charge an d
air flow may reduc e energy effic iency and shorten
equipment lif e.
C08515
the environmentally sound refrigerant
TABLE OF CONTENTS
PAGE
PAGE
FEATURES AND BENEFITS3....................
MODEL NUMBER NOMENCLA TURE4............
FACTORY OPTIONS & ACCESSORIES5...........
ARI CAPACITY RATING8.......................
SOUND PERFORMANCE9.......................
PHYSICAL DATA10.............................
WEIGHTS & DIMENSIONS18....................
APPLICATION DATA24.........................
548J
COOLING TABLES26...........................
STATIC PRESSURE TABLES35...................
F AN PERFORMANCE36.........................
OUTDOOR AIR INTAKE & EXHAUST PERF46.....
ELECTRICAL INFO47...........................
MCA / MOCP49................................
TYPICAL WIRING DIAGRAMS61................
GUIDE SPECIFICATIONS68......................
Your Bryant Packaged Heat Pump rooftop unit (RTU) was designed by customers for customers. With no--strip screw
collars, handled access panels, and more we’ve made your unit easy to install, easy t o maintain and easy to use.
Easy to install:
All Legacy Linet units are field--convertible to horizontal air flow; no special adapter curbs or kits are necessary.
Convertible airflow design makes it easy to adjust to unexpected job--site complications. Light er units make easy
replacement. Bryant 3--8.5 ton 548J rooftops fit on existing Bryant curbs dating back to 1989. Also, our large control box
gives you room to work and room to mount Bryant accessory controls.
Easy to maintain:
Easy access handles by Bryant provide quick and easy access to all normally serviced components. Our “no--strip” screw
system has superior holding power and guides screws into position while preventing the screw from stripping the unit’s
metal. Take accurate pressure readings by reading condenser pressure with panels on. Simply remove the black, composite
plug, route your gauge line(s) through the hole, and connect them to the refrigeration service valve(s). Now, you can take
refrigeration system pressure readings without affecting the condenser airflow.
Easy to use:
The newly designed, master terminal board by Bryant puts all your connect ions and troubleshooting points in one
convenient place, standard. Most low voltage connections are made to the same board and make it easy to find what you’re
looking for and easy to access it. Bryant rooftops have high and low pressure switches, a filter drier, and 2” (51mm) filters
standard.
2
FEATURES AND BENEFITS
S Up to 28% lighter than similar industry units. Lighter rooftops make easier replacement jobs.
S 3--8. 5 ton units fit on existing Bryant rooftop curbs making the utility connections the same. This saves time and money
on replacement jobs.
S Standardized components a nd layout. Standardized com ponents and controls make service and stocking parts easie r.
S Scroll compressors on all units. This makes service, stocking parts, replacement, and trouble-- shooting easier.
S Crankcase heater on all models (except 04 siz e) provide s added protection in all applications.
S Precession sized suction line accumulator provide high reliability by preventing liquid from entering the compressor
during low ambient conditions and reverse cycle switch over.
S Field convertible airflow (3--8. 5 tons). Being able to convert a unit from vertical airflow to horizontal makes it easy to
overcome job site complications.
S 4--way reversing valve rapidly changes the flow of refrigerant to quickly changeover from cooling to heating and heating
to cooling.
S Easy--adjust, belt--drive motor available on all sizes. Bryant provides a factory solution for most points in the fan
performance table. There’s no need for field--supplied drives or motors.
S 3--5 ton models come standard with an Electric Drive X13, 5 speed/torque motor to provide exact performance in many
applications. Belt drive motor optional.
S Provisions for bottom or side condensate drain.
S Capable of thru--the--base or thru--the--curb electrical routing.
S Dependable time/temperature defrost logic provides a defrost cycle, if needed, every 30, 60, 90 or 120 minutes and is
adjustable.
S Single--point electrical connection.
S Sloped, composite drain pan. Sloped, composite drain pan sheds water; and won’t rust.
548J
S Standardized controls and control box layout. Standardized components and controls make stocking parts and service
easier.
S Clean, easy to use control box.
S Standard coils are copper round tube, aluminum plate fin with optional coil coatings and copper fin design.
S Color--coded wir ing.
S Large, laminated wiring and power wiring drawings which are affixed to unit make troubleshooting easy.
S Single, central terminal board for test and wiring connections.
S Fast--access, handled, panels for easy access to the blower and blower motor, control box, and compressors.
S “No--strip” screw system guides screws into the panel and captures them tightly without stripping the screw, the panel, or
the unit.
S Exclusive, newly--design indoor refrigerant header for easier maintenance and replacement.
S Mechanical cooling (115_Fto25_For46_Cto--4_C) on Electro--Mechanical (E/M) and Direct Digital Controller
(DDC) (RTU--MP controller).
S 2” (51mm) disposable filters on all units.
S High capacity refrigerant filter--drier on each circuit.
S High pressure switch, loss of charge switch and freeze protection adds greater unit reliability.
3
548J
MODEL NUMBER NOMENCLATURE
123456789101112131415161718
548JP 06 A 000A 0 B 0A A --
________________________________
Unit TypeDesign Revision
548J = High Eff. Heat Pump--- = First Revision
VoltagePackaging
E = 4 6 0 --- 3 --- 6 0A=Standard
J = 208/230--- 1-- -60B=LTL
P = 208/230---3--- 60
T = 5 7 5 --- 3 --- 6 0Factory Installed Options
0A = None
Cooling Tons
04=3Ton07=6TonOutdoor Air Options
05 = 4 Ton08 = 7.5 TonA=None
06 = 5 Ton09 = 8.5 TonB=Tempeconow/barorelief
E=Tempeconow/barorelief&CO
Refrig. System OptionsH = Enthalpy econo w/ baro relief
A = One--- Stage Cooling ModelsL = Enthalpy econo w/ baro relief & CO
Heat Level (Field --- installed electric heaters availableIndoor Fan Options
000 = No Heat0 = Electric Drive X13 Motor (04--- 06)
1 = Standard static option --- Belt Drive
Coil Options (Outdoor --- Indoor)2 = Medium static option --- Belt Drive
A = Al/Cu ---Al/Cu3 = High static option --- Belt Drive
B = P r e c o a t A l / C u --- A l / C u
C = E --- c o a t A l / C u --- A l / C u
D = E --- c o a t A l / C u --- E --- c o a t A l / C u
E = C u / C u --- A l / C u
F = Cu/Cu --- Cu/Cu
M = A l / C u --- A l / C u --- L o u v e r e d H a i l g u a r d s
N = P r e c o a t A l / C u --- A l / C u --- L o u v e r e d H a i l G u a r d s
P = E c o a t A l / C u --- A l / C u --- L o u v e r e d H a i l G u a r d s
Q = E c o a t A l / C u --- E co a t A l / C u --- L o u v e r e d H a i l G u a r d s
R = C u / C u --- A l / C u --- L o u v e r e d H a i l G u a r d s
S = C u / C u --- C u / C u --- L o u v e r e d H a i l G u a r d s
This product has been design ed and m anufactured to
meet En ergy St ar® criteria for energy effici ency.
However, proper ref rigerant charge an d proper air flow
are critical to achieve rated capacity and efficiency.
Installation of this product should follow all
manufacturer’s refrigerant charging and air flow
instructions. Failure to con firm proper charge an d
air flow may reduc e energy effic iency and shorten
equipment lif e.
the environmentally sound refrigerant
4
FACTORY OPTIONS AND/OR ACCESSORIES
Table 1 – FACTORY--INSTALLED OPTIONS AND FIELD--INSTALLED ACCESSORIES
FACTORY
CATEGORYITEM
CabinetT h r u --- t h e --- b a s e e l e c t r i c a l c o n n e c t i o n sXX
Low Ambient ControlMotormaster head pressure controller
Power
Options
Roof Curbs
NOTES:
1. Included with economizer.
2. Sensors for optimizing economizer.
3. See application data for assistance.
Pre--- coated outdoor coilsX
Premium, E --- coated outdoor coilsX
Thermostats, temperature sensors, and subbasesX
R T U --- M P M u l t i --- p r o t o c o l c o n t r o l l e rX
Smoke detector (supply and/or return air)X
Time Guard II compressor delay control circuitX
Phase MonitorX
EconoMi$er IV (for electro ---mechanical controlled RTUs)XX
EconoMi$er2 (for DDC controlled RTUs)XX
Motorized 2 position outdoor--- air damperXX
Manual outdoor---air damper (25% and 50%)X
Barometric relief
Power exhaustX
Single dry bulb temperature sensors
Differential dry bulb temperature sensors
Single enthalpy sensors
Differential enthalpy sensors
CO2sensor (wall, duct, or unit mounted)
Electric Resistance HeatersX
Single Point KitX
Multiple motor and belt drive packagesX
Electric Drive, X13, 5 ---speed/torque (3 ---5 ton)X
Economizers save money. They bring in fresh, outside air
for ventilation; and provide cool, outside air to cool your
building. This is the preferred method of low--ambient
cooling. When coupled to CO
provide even more savings by coupling the ventilation air
to only that amount re quired.
Economizers are available, installed and tested by the
factory, with either enthalpy or dry--bulb temperat ure
inputs. There are also models for elect romechanical as
well as direct digital controllers. Additional sensors are
available as accessories to optimize the economizers.
Economizers include gravity controlled, barometric relief
equalizes building pressure and ambient air pressures.
548J
This can be a cast effective solution to prevent building
pressurization.
sensors, Economizers can
2
CO2Sensor
Improves productivity and saves money by working with
the economizer to intake only the correct amount of
outside air for ventilation. As occupants fill your building,
the CO
CO
When the occupants leave, the CO
the sensor appropriately closes the economizer. This
intelligent control of the ventilation air, called Demand
Control Ventilation (DCV) reduces the overall load on the
rooftop, saving money.
sensor detects their presence through increasing
2
levels, and opens the economizer appropriately.
2
levels decrease, and
2
Smoke Detectors
Trust the expe rts. Smoke detectors make your application
safer and your job easier. Bryant smoke detectors
immediately shut down the rooftop unit when smoke is
detected. They are available, installed by the factory, for
supply air, return air, or both.
Louvered Hail Guards
Sleek, louvered panels protect the condenser coil from
hail damage, foreign objects, and incidental contact.
Non--fused Disconnect
This OSHA--compliant, factory--installed, safety switch
allows a service technician to locally secure power to the
rooftop.
Power Exhaust Pressure Relief
Superiorinternalbuildingpressurecontrol.This
field-- installed accessory may eliminate the need for
costly, external pressure control fans.
RTU--MP, Multi--protocol Controller
Connect the rooftop to an existing BAS without needing
complicated translators or adapter modules using the
RTU--MP controller. This new controller speaks the 4
most common building automation system languages
(Bacnet, Modbus, N2, and Lonworks). Use this controller
when you have an existing BAS.
Time Guard II Control Circuit
This accessory protects your compressor by preventing
short--cycling in the event of some other failure, prevents
the compressor from restarting for 30 seconds after
stopping. Not required with RTU--MP or authorized
commercial thermostats.
Filter or Fan Status Switches
Use these differential pressure switches to detect a filter
clog or indoor fan motor failure. When used in
conjunction with a compatible unit controller/thermostat,
the switches will activate an alarm to warn the appropriate
personnel.
Motorized 2--Position Damper
The new Bryant 2--position, motorized outdoor air damper
admits up to 100% outside air. Using reliable, gear --driven
technology, the 2--position damper opens to allow
ventilation air and c loses when the rooftop stops, stopping
unwanted infiltration.
Manual OA Damper
Convenience Outlet (powered or un--powered)
Lower service bills by including a convenience outlet in
your specification. Bryant will install this service feature
at our factory, powered. Provides a convenient, 15 amp,
115V GFCI receptacle.
Manual out door air dampers are an econom ical way to
bring in ventilation air. The dampers are available in 25%
and 50% versions.
6
FACTORY OPTIONS AND/OR ACCESSORIES (cont.)
Motormaster Head Pressure Controller
The Motormaster motor controller is a low ambient, head
pressure controller kit that is designed to maintain the
unit’s condenser head pressure during periods of low
ambient cooling operation. This device should be used as
an alternative to economizer free cooling not when
economizer usage is either not appropriate or desired. The
Motormaster will either cycle the outdoor--fan motors or
operate them at reduced speed to maintain the unit
operation, depending on the model.
Alternate Motors and Drives
Some applications need larger horsepower motors, some
need more airflow, and some need both. Regardless of the
case, yourBryant experthas a factory installed
combination to meet your application. A wide selection of
motors and pulleys (drives) areavailable, factory
installed, to handle nearly any application.
Thru--the--Base Connections
Thru--the--base connections,availableaseitheran
accessory or as a factory option, are necessary to ensure
proper connection and seal when routing wire and piping
through the rooftop’s basepan and curb. T hese couplings
eliminate roof penetration and should be considered for
gas lines, main power lines, as well as control power.
Electric Heaters
Bryant offers a full--line of field--installed accessory
heaters. The heaters are very easy to use, install and are
all pre--engineered and certified.
NOTE:
All AHRI ratings are based on 230, 460 and 575 volt.
**Electric Drive (direct drive) X13 5 speed/torque motor. SEER rating is 13.0 for belt drive.
NA Not applicable
ARI--- Air--- Conditioning, Heating and Refrigeration
Institute
ASHRAE--- American Society of Heating, Refrigerating
and Air Conditioning, Inc.
COP--- Coefficient of Performance
EER--- Energy Efficiency Ratio
HSPF--- Heating Seasonal Performance Factor
IPLV--- Integrated Part Load Value
SEER--- Seasonal Energy Efficiency Ratio
NET COOLING
CAPACITY
(BTUH)
CAPACITY
(BTUH)
TOTAL
POWER
(kW)
HEATING MODE
HEATING, LOWHEATING, HIGH
NOTES:
1. Rated and certified under ARI Standard 210/240 --- 06 or
2. Ratings are based on:
3. All 548J units comply with ASHRAE 90.1 2001, 2004 Energy
4. Where appropriate, 548J units comply with US Energy Policy
SEEREERIPLV
COP
CAPACITY
(BTUH)
COP
340/360--- 07, as appropriate.
Cooling Standard: 80_F(27_C) db, 67_F(19_C) wb indoor air
temp and 95_F db outdoor air temp.
IPLV Standard:80_F(27_C) db, 67_F(19_C) wb indoor air
temp and 80_F(27_C) db outdoor air temp.
Standard for minimum SEER and EER requirements.
Act (2005). Refer to state and local codes or visit the following
website: http://bcap--- energy. org to determine if compliance
with this standard pertains to your state, territory, or
municipality.
This product has been design ed and m anufactured to
meet En ergy St ar® criteria for energy effici ency.
However, proper ref rigerant charge an d proper air flow
are critical to achieve rated capacity and efficiency.
Installation of this product should follow all
manufacturer’s refrigerant charging and air flow
instructions. Failure to con firm proper charge an d
air flow may reduc e energy effic iency and shorten
equipment lif e.
8
Table 3 – MINIMUM -- MAXIMUM AIRFLOWS ELECTRIC HEAT
1. Outdoor sound data is measure in accordance with ARI standard 270 ---95.
2. Measurements are expressed in terms of sound power. Do not
compare these values to sound pressure values because sound
pressure accounts for specific environmental factors which do
not match individual applications. Sound power values are independent of the environment and therefore more accurate.
3. A--- weighted sound ratings filter out very high and very low
frequencies, to better approximate the response of an “average” human ear. A --- weighted measurements for Bryant units
are taken in accordance with 270 --- 95.
Loss of Charge Pressure Trip / Reset (psig)27 / 4427 / 44
Evap. Coil
MaterialCu / AlCu / Al
Coil type3/8” RTPF3/8” RTPF
Rows / FPI3 / 154/15
Total Fa c e Ar e a (ft2)11.111.1
Condensate Drain Conn. Size3/4”3/4”
Evap. Fan and Motor
Motor Qty / Drive Type1/Belt1/Belt
Max BHP1.21.2
RPM Range460--- 652460--- 652
3phase
Standard Static
Fan Diameter x Length (in)15 x 1515 x 15
Motor Frame Size5656
Fan Qty / Type1/Centrifugal1/Centrifugal
548J
3phase
Medium Static
3phase
High Static
Cond. Coil
Cond. fan / motor
Filters
Motor Qty / Drive Type
Max BHP
RPM Range591--- 838591--- 838
Motor Frame Size5656
Fan Qty / Type1/Centrifugal1/Centrifugal
Fan Diameter x Length (in)15 x 1515 x 15
Motor Qty / Drive Type1/Belt1/Belt
Max BHP2.92.9
RPM Range838---1084838--- 1084
Motor Frame Size5656
Fan Qty / Type1/Centrifugal1/Centrifugal
Fan Diameter x Length (in)15 x 1515 x 15
MaterialCu / AlCu / Al
Coil type3/8” RTPF3/8” RTPF
Rows / FPI2 / 172/17
Total Fa c e Ar e a (ft2)25.125.1
Qty / Motor Drive Type2 / direct2/direct
Motor HP / RPM1/4 / 11001/4 / 1100
Fan diameter (in)22.022.0
RAFilter#/Size(in)4/16x20x24/20x20x2
OA inlet screen # / Size (in)1/20x24x11/20x24x1
1/Belt1/Belt
2.92.9
11
Table 7 – ELECTRIC HEAT -- ELECTRICAL DATA3 TONS
SINGLE POINT KIT PART NUMBER
IFM
UNIT
548J
548J*04
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
BD--- Belt drive motor
C.O.--- Convenient outlet
DD--- Electric Drive X13 5 speed/torque motor
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
Table 7 -- (cont.) ELECTRIC HEAT -- ELECTRICAL DATA4 TONS
SINGLE POINT KIT PART NUMBER
IFM
UNIT
548J*05
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
BD--- Belt drive motor
C.O.--- Convenient outlet
DD--- Electric Drive X13 5 speed/torque motor
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
Table 7 -- (cont.) ELECTRIC HEAT -- ELECTRICAL DATA5 TONS
SINGLE POINT KIT PART NUMBER
IFM
UNIT
TYPE
N O M . V --- P H --- H Z
STD
DD
208/230--- 1 --- 60
STD
DD
548J
MED
BD
208/230--- 3 --- 60
HIGH
548J*06
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
BD--- Belt drive motor
C.O.--- Convenient outlet
DD--- Electric Drive X13 5 speed/torque motor
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
Table 7 -- (cont.) ELECTRIC HEAT -- ELECTRICAL DATA6 TONS
SINGLE POINT KIT PART NUMBER
IFM
UNIT
548J*07
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
C.O.--- Convenient outlet
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
Table 7 -- (cont.) ELECTRIC HEAT -- ELECTRICAL DATA7.5 TONS
SINGLE POINT KIT PART NUMBER
IFM
UNIT
TYPE
N O M . V --- P H --- H Z
STD
MED
208/230--- 3 --- 60
548J
HIGH
STD
548J*08 (2---STAGE COOL)
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
C.O.--- Convenient outlet
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
Table 7 -- (cont.) ELECTRIC HEAT -- ELECTRICAL DATA8.5 TONS
SINGLE POINT KIT PART NUMBER
IFM
N O M . V --- P H --- H Z
208/230--- 3--- 60
4 6 0 --- 3 --- 6 0
5 7 5 --- 3 --- 6 0
TYPE
STD
MED
HIGH
STD
MED
HIGH
STD
MED
HIGH
UNIT
548J*09 (2---STAGE COOL)
--- No Single Point Kit required
LEGEND
APP PWR--- 208 / 230V / 460V / 575V
C.O.--- Convenient outlet
FLA- -- Full load amps
IFM--- Indoor fan motor
NOM PWR--- 240V / 480V / 600V
P.E .--- P o w e r e x h a u s t
PWRD--- Powered convenient outlet
UNPWRD--- Unpowered convenient outlet
36” (914 mm)Surface behind servicer is electrically non ---conductive (e.g., wood, fiberglass)
SpecialCheck for sources of flue products within 10--- ft of unit fresh air intake hood
36” (914 mm)Side condensate drain is used
18” (457 mm)Minimum clearance
42” (1067 mm)Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
36” (914 mm)Surface behind servicer is electrically non ---conductive (e.g., wood, fiberglass)
36” (914 mm)Surface behind servicer is electrically non ---conductive (e.g., wood, fiberglass)
SpecialCheck for sources of flue products within 10--- ft of unit fresh air intake hood
36” (914 mm)Side condensate drain is used
18” (457 mm)Minimum clearance
42” (1067 mm)Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
36” (914 mm)Surface behind servicer is electrically non ---conductive (e.g., wood, fiberglass)
D
A
C08337
22
WEIGHTS & DIMENSIONS (cont.)
548J08, 09
ROOFCURB
ACCESSORY
CRRFCURB003A01
CRRFCURB004A01
1’ - 2”
[356]
2’ - 0”
[610]
UNIT SIZE
548J08, 09
548J
Fig. 8 -- Curb Dimensions 548J 08--09
23
C08561
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