Bryant 548J Operation manual

548J
PACKAGED HEAT PUMP
3 TO 8.5 NOMINAL TONS
Product Data
C08515
(Optional hail guard shown.)
This product has been designed and manufactured to
meet Energy Star®criteria for energy efficiency.
However, proper refrigerant charge and 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 confirm proper charge and
air flow may reduce energy efficiency and shorten
equipment life.
the environmentally sound refrigerant

2
TABLE OF CONTENTS
PAGE
FEATURES AND BENEFITS 3....................
MODEL NUMBER NOMENCLATURE 4............
FACTORY OPTIONS & ACCESSORIES 5...........
ARI CAPACITY RATING 8.......................
SOUND PERFORMANCE 9.......................
PHYSICAL DATA 10.............................
WEIGHTS & DIMENSIONS 18....................
APPLICATION DATA 24.........................
PAGE
COOLING TABLES 26...........................
STATIC PRESSURE TABLES 35...................
FAN PERFORMANCE 36.........................
OUTDOOR AIR INTAKE & EXHAUST PERF 46.....
ELECTRICAL INFO 47...........................
MCA / MOCP 49................................
TYPICAL WIRING DIAGRAMS 61................
GUIDE SPECIFICATIONS 68......................
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 to maintain and easy to use.
Easy to install:
All Legacy Linetunits 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. Lighter 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 connections 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.
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FEATURES AND BENEFITS
SUp to 28% lighter than similar industry units. Lighter rooftops make easier replacement jobs.
S3--8.5 ton units fit on existing Bryant rooftop curbs making the utility connections the same. This saves time and money
on replacement jobs.
SStandardized components and layout. Standardized components and controls make service and stocking parts easier.
SScroll compressors on all units. This makes service, stocking parts, replacement, and trouble--shooting easier.
SCrankcase heater on all models (except 04 size) provides added protection in all applications.
SPrecession sized suction line accumulator provide high reliability by preventing liquid from entering the compressor
during low ambient conditions and reverse cycle switch over.
SField 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.
S4--way reversing valve rapidly changes the flow of refrigerant to quickly changeover from cooling to heating and heating
to cooling.
SEasy--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.
S3--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.
SProvisions for bottom or side condensate drain.
SCapable of thru--the--base or thru--the--curb electrical routing.
SDependable time/temperature defrost logic provides a defrost cycle, if needed, every 30, 60, 90 or 120 minutes and is
adjustable.
SSingle--point electrical connection.
SSloped, composite drain pan. Sloped, composite drain pan sheds water; and won’t rust.
SStandardized controls and control box layout. Standardized components and controls make stocking parts and service
easier.
SClean, easy to use control box.
SStandard coils are copper round tube, aluminum plate fin with optional coil coatings and copper fin design.
SColor--coded wiring.
SLarge, laminated wiring and power wiring drawings which are affixed to unit make troubleshooting easy.
SSingle, central terminal board for test and wiring connections.
SFast--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.
SExclusive, newly--design indoor refrigerant header for easier maintenance and replacement.
SMechanical cooling (115_Fto25_For46_Cto--4_C) on Electro--Mechanical (E/M) and Direct Digital Controller
(DDC) (RTU--MP controller).
S2” (51mm) disposable filters on all units.
SHigh capacity refrigerant filter--drier on each circuit.
SHigh pressure switch, loss of charge switch and freeze protection adds greater unit reliability.
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MODEL NUMBER NOMENCLATURE
123456789101112131415161718
5 4 8 J P 0 6 A 0 0 0 A 0 B 0 A A --
____________ ______ ________ ______
Unit Type Design Revision
548J = High Eff. Heat Pump --- = First Revision
Voltage Packaging
E = 4 6 0 --- 3 --- 6 0 A=Standard
J = 208/230---1--- 60 B=LTL
P = 208/230---3--- 60
T = 5 7 5 --- 3 --- 6 0 Factory Installed Options
0A = None
Cooling Tons
04=3Ton 07=6Ton Outdoor Air Options
05 = 4 Ton 08 = 7.5 Ton A=None
06 = 5 Ton 09 = 8.5 Ton B=Tempeconow/barorelief
E=Tempeconow/barorelief&CO
2
Refrig. System Options H = Enthalpy econo w/ baro relief
A = One--- Stage Cooling Models L = Enthalpy econo w/ baro relief & CO2
D = Two---Stage Cooling Models Q = Motorized 2 pos damper
Heat Level (Field---installed electric heaters available Indoor Fan Options
000 = No Heat 0 = 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/Cu 3 = 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 c o 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
the environmentally sound refrigerant
This product has been designed and manufactured to
meet Energy Star®criteria for energy efficiency.
However, proper refrigerant charge and 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 confirm proper charge and
air flow may reduce energy efficiency and shorten
equipment life.
548J

5
FACTORY OPTIONS AND/OR ACCESSORIES
Table 1 – FACTORY--INSTALLED OPTIONS AND FIELD--INSTALLED ACCESSORIES
CATEGORY ITEM
FACTORY
INSTALLED
OPTION
FIELD
INSTALLED
ACCESSORY
Cabinet T 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 s X X
Coil Options
Cu/Cu indoor and/or outdoor coils X
Pre--- coated outdoor coils X
Premium, E---coated outdoor coils X
Condenser Protection Condenser coil hail guard (louvered design) X X
Controls
Thermostats, temperature sensors, and subbases X
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 r X
Smoke detector (supply and/or return air) X
Time Guard II compressor delay control circuit X
Phase Monitor X
Economizers
& Outdoor Air
Dampers
EconoMi$er IV (for electro---mechanical controlled RTUs) X X
EconoMi$er2 (for DDC controlled RTUs) X X
Motorized 2 position outdoor --- air damper X X
Manual outdoor---air damper (25% and 50%) X
Barometric relief1X X
Power exhaust X
Economizer Sensors &
IAQ Devices
Single dry bulb temperature sensors2X X
Differential dry bulb temperature sensors2X
Single enthalpy sensors2X X
Differential enthalpy sensors2X
CO2sensor (wall, duct, or unit mounted)2X X
Electric Heat Electric Resistance Heaters X
Single Point Kit X
Indoor Motor & Drive Multiple motor and belt drive packages X
Electric Drive, X13, 5---speed/torque (3---5 ton) X
Low Ambient Control Motormasterhead pressure controller3X
Power
Options
Convenience outlet (powered) X
Convenience outlet (unpowered) X
Non --- fused disconnect X
Roof Curbs Roof curb 14” (356mm) X
Roof curb 24” (610mm) X
NOTES:
1. Included with economizer.
2. Sensors for optimizing economizer.
3. See application data for assistance.
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FACTORY OPTIONS AND/OR ACCESSORIES (cont.)
Economizer (dry--bulb or enthalpy)
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 CO2sensors, Economizers can
provide even more savings by coupling the ventilation air
to only that amount required.
Economizers are available, installed and tested by the
factory, with either enthalpy or dry--bulb temperature
inputs. There are also models for electromechanical 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.
This can be a cast effective solution to prevent building
pressurization.
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 CO2sensor detects their presence through increasing
CO2levels, and opens the economizer appropriately.
When the occupants leave, the CO2levels decrease, and
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.
Smoke Detectors
Trust the experts. 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.
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.
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
Superior internal building pressure control. 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 closes when the rooftop stops, stopping
unwanted infiltration.
Manual OA Damper
Manual outdoor air dampers are an economical way to
bring in ventilation air. The dampers are available in 25%
and 50% versions.
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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, your Bryant expert has a factory installed
combination to meet your application. A wide selection of
motors and pulleys (drives) are available, factory
installed, to handle nearly any application.
Thru--the--Base Connections
Thru--the--base connections, available as either an
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. These 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.
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Table 2 – ARI COOLING RATING TABLES
COOLING MODE
548J*
NOMINAL
CAPACITY
(TONS)
NET COOLING
CAPACITY
(BTUH)
TOTAL
POWER
(kW)
SEER EER IPLV
04A 337,000 3.3 13.40** 11.00 N/A
05A 447,000 4.1 13.10** 11.20 N/A
06A 561,500 5.5 13.20** 11.15 N/A
07A 670,000 6.3 N/A 11.10 N/A
08D 7.5 88,000 7.8 N/A 11.20 12.40
09D 8.5 99,000 8.8 N/A 11.20 12.40
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
HEATING MODE
548J* HSPF
HEATING, LOW HEATING, HIGH
CAPACITY
(BTUH) COP CAPACITY (BTUH) COP
04A 7.70 18,200 N/A 35,600 N/A
05A 7.70 23,600 N/A 45,500 N/A
06A 7.70 31,200 N/A 58,000 N/A
07A N/A 34,800 2.25 67,000 3.30
08D N/A 48,000 2.25 86,000 3.30
09D N/A 54,500 2.25 96,000 3.30
LEGEND
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
This product has been designed and manufactured to
meet Energy Star®criteria for energy efficiency.
However, proper refrigerant charge and 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 confirm proper charge and
air flow may reduce energy efficiency and shorten
equipment life.
NOTES:
1. Rated and certified under ARI Standard 210/240---06 or
340/360--- 07, as appropriate.
2. Ratings are based on:
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.
3. All 548J units comply with ASHRAE 90.1 2001, 2004 Energy
Standard for minimum SEER and EER requirements.
4. Where appropriate, 548J units comply with US Energy Policy
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.
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Table 3 – MINIMUM -- MAXIMUM AIRFLOWS ELECTRIC HEAT
UNIT COOLING ELECTRIC HEATERS
MINIMUM MAXIMUM MINIMUM MAXIMUM
548J*04 900 1500 900 1500
548J*05 1200 2000 1200 2000
548J*06 1500 2500 1500 2500
548J*07 1800 3000 1800 3000
548J*08 2250 3750 2250** 3750
548J*09 2550 4250 2250** 4250
**Minimum electric heat CFM exceptions :
UNIT UNIT VOLTAGE HEATER kW UNIT
CONFIGURATION
REQUIRED MINIMUM
CFM
548J*08
548J*09 575 17.0 Horizontal or Vertical 2800
34.0 2350
Table 4 – SOUND PERFORMANCE TABLE
548J* OUTDOOR SOUND (DB)
A --- W E I G H T E D 63 125 250 500 1000 2000 4000 8000
04A 77 78.9 81.7 74.9 72.5 70.3 65.6 65.6 62.6
05A 80 90.4 84.6 77.6 77.5 74.8 70.6 68.0 64.2
06A 80 92.7 84.9 79 76.7 73.8 69.6 66.4 62.8
07A 78 88.0 79.5 76.2 75.8 72.5 68.6 65.7 62.4
08D 82 89.7 81.5 80.5 79.2 77.1 73.2 70.2 67.4
09D 84 90.8 85.2 81.6 79.5 78.1 74.0 70.4 66.5
LEGEND
dB --- Decibel
NOTES:
1. Outdoor sound data is measure in accordance with ARI stand-
ard 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 inde-
pendent 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 “aver-
age” human ear. A--- weighted measurements for Bryant units
are taken in accordance with 270---95.
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Table 5 – PHYSICAL DATA (COOLING) 3 -- 6 TONS
548J*04 548J*05 548J*06 548J*07
Refrigeration System
#Circuits/#Comp./Type 1/1/Scroll 1/1/Scroll 1/1/Scroll 1/1/Scroll
Puronrrefrig. (R--- 410A) charge per circuit A/B (lbs---oz) 9 --- 8 / --- 1 0 --- 3 / --- 1 2 --- 1 3 / --- 1 6 --- 1 3 / ---
O i l A / B ( o z ) 4 2 / --- 4 2 / --- 4 2 / --- 5 6 / ---
Metering Device Acutrol Acutrol Acutrol Acutrol
High--- pressure Trip / Reset (psig) 630 / 505 630 / 505 630 / 505 630 / 505
Loss of Charge Pressure Trip / Reset (psig) 27 / 44 27 / 44 27 / 44 27 / 44
Evap. Coil
Material Cu / Al Cu / Al Cu / Al Cu / Al
Coil type 3/8” RTPF 3/8” RTPF 3/8” RTPF 3/8” RTPF
Rows / FPI 3 / 15 3/15 4/ 15 4/ 15
Tot a l Face A r e a ( f t 2)5.5 5.5 7.3 7.3
Condensate Drain Conn. Size 3/4” 3/4” 3/4” 3/4”
Evap. Fan and Motor
Standard Static
1phase
Motor Qty / Drive Type 1/Direct 1/Direct 1/Direct N/A
Max BHP 111
RPM Range 600--- 1200 600--- 1200 600--- 1200
Motor Frame Size 48 48 48
Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal n/Centrifugal
Fan Diameter x Length (in) 10 x 10 10 x 10 11 x 10
Standard Static
3phase
Motor Qty / Drive Type 1/Direct 1/Direct 1/Direct 1/Belt
Max BHP 1111.5
RPM Range 600--- 1200 600--- 1200 600--- 1200 878---1192
Motor Frame Size 48 48 48 56
Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal
Fan Diameter x Length (in) 10 x 10 10 x 10 11 x 10 10 x 10
Medium Static
3phase
Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt
Max BHP 1.5 1.5 22.9
RPM Range 819--- 1251 920--- 1303 1066--- 1380 1066--- 1380
Motor Frame Size 56 56 56 56
Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal
Fan Diameter x Length (in) 10 x 10 10 x 10 10 x 10 10 x 10
High Static
3phase
Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt
Max BHP 2 2 2.9 2.9
RPM Range 1035---1466 1035--- 1466 1208---1639 1208--- 1639
Motor Frame Size 56 56 56 56
Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal
Fan Diameter x Length (in) 10 x 10 10 x 10 10 x 10 10 x 10
Cond. Coil
Material Cu / Al Cu / Al Cu / Al Cu / Al
Coil type 3/8” RTPF 3/8” RTPF 3/8” RTPF 3/8” RTPF
Rows / FPI 2 / 17 2/17 2/17 2/17
Tot a l Face A r e a ( f t 2) 10.7 12.7118055 15 21.25
Cond. fan / motor
Qty / Motor Drive Type 1 / direct 1/direct 1/direct 1/direct
Motor HP / RPM 1/8 / 825 1/4 / 1100 1/4 / 1100 1/4 / 1100
Fan diameter (in) 22 22 22 22
Filters
RAFilter#/Size(in) 2/16x25x2 2/16x25x2 4/16x16x2 4/16x16x2
OA inlet screen # / Size (in) 1/20x24x1 1/20x24x1 1/20x24x1 1/20x24x1
548J