Bryant 548J-D User Manual
548J***D
SINGLE PACKAGE ROOFTOP
HIGH--EFFICIENCY HEAT PUMP UNITS
WITH FIELD--INSTALLED ELECTRIC HEAT
SIZES 17 & 24 WITH PURONR (R--410A) REFRIGERANT
Submittal Data
548J***D units are one--piece, two--stage heat pump units
that are low profile, prewired, tested and charged at the
factory. These are intended for installation on a roof curb
accessory (ordered separately), or for slab mounting (for
horizontal duct connections). Units are designed to accept
field--installed electric heaters. Units may be ordered with
various factory--installed options. Field--installed accessories
are also available.
Certified to ISO
9001:2000
Use of the AHRI Certified
TM Mark indicates a
manufacturer’s
participation in the
program For verification
of certification for individual
products, go to
www.ahridirectory.org.
DESCRIPTION
STANDARD FEATURES
Base Unit
S Puron (R--410A) HFC refrigerant
S EER’s up to 10.8
S IEER’s up to 11.5
S COP’supto3.3
S ASHRAE 90.1 energy compliant
S Rated in accordance with AHRI Standard 340/360
S Designed in accordance with Underwriters’ Laboratories
Standard 1995
S Two--stage cooling capacity control on all models
S Non--corrosive composite sloping design; side or center drain
condensate pan. Meets ASHRAE Standard 62
S Cooling operating range from 30_Fupto115_F
(--1_Cupto46_C).
S Dedicated vertical nd horizontal airflow models available,
ordered as factory option. No special kits required
S Two--inch disposable return air filters
S Thru--the--bottom power entry capability
S Single point electric connections on field--installed electric heat
units
S 24--volt control circuit protected with resettable circuit breaker
and 75--VA transformer
S Belt drive, constant torque, permanently lubricated
evaporator--fan motor on all size units.
S Totally enclosed condenser motors with permanently lubricated
bearings
S State--of--the--art defrost control board, easily configured for
defrost cycles of 30, 60, 90, or 120 minutes.
S Centralized Terminal Board for component and unit wiring
connections.
S Loss of Charge, High--Pressure, and Freeze Protection switches
S Full perimeter base rail with built--in rigging adapters and fork
truck slots.
Cabinet
S Access panels with easy grip handles
S Innovative, easy starting, no strip screw features on unit access
panels.
S Pre--painted exterior panels and primer--coated interior panels
tested to 500 hours salt spray protection
S Fully insulated cabinet
S Tool--less filter access door
Refrigerant System
S Acutrolt refrigerant metering system
S Liquid line filter drier
S Scroll compressors with internal line--break overload protection
S Indoor and outdoor coils constructed of aluminum fins
mechanically bonded to seamless copper tubes.
S Removable gauge line plugs for reading refrigerant pressure
with unit panels in place
S Four--way reversing valve operation
S Suction Line Accumulator standard -- prevents excessive liquid
flood back of refrigerant to the compressor even during the start
of the defrost cycle.
Standard Parts Warranty
S 5--year electric heater (field--installed)
S 5--year compressor
S 1--year parts
Job Name
Architect
Engineer
Contractor
Unit Designation
SUBMITTAL DATA
PERFORMANCE DATA
Unit Operating Weight lb
548J***D
Cooling
Net Total Capacity Btuh
Net Sensible Capacity Btuh
Compressor Power Input kW
at Outdoor Air Temperature _F
Indoor Entering Air db: _Fwb _F
CFM External Static Pressure in wg
EER
IEER
Curb Weight lb
Heating
Power Input to Unit kw
Integrated Capacity Btuh
Indoor Operating Air Temperature _Fdb
Outdoor Air Temperature _F (Winter Design)
Rating at 70% R.H. Outdoors kW Heater Selected
Heat/Cool Ratio
Electrical Capacity Required Btuh
COP High Low
ELECTRICAL DATA
Power Supply to Unit Volts Phase Hz
Minimum Circuit Amps Maximum Overcurrent Protection (Fuse Only)
2
OPTIONS AND ACCESSORIES
FACTORY--INSTALLED OPTIONS (FIOPs)
j Open protocol RTU Direct Digital Control (DDC)
LON, MODBUS, BACNET and Johnson N2 protocols.
j Dedicated vertical discharge and return air units
j Dedicated horizontal discharge and return air units
j Through the base connectors electric conduit
j EconoMi$ert IV with controls and barometric relief
(vertical only)
j EconoMi$er2 with 4--20 mA actuator and barometric
rd
relief only (for RTU--MP/OPEN or 3
party EMS
system control)
j Two--position motorized outdoor air damper
j Non--fused disconnect switch (80 A Max)
j Powered 115--volt convenience outlet
j Non--powered 115--volt convenience outlet
j High static indoor fan motor and drive
j Return Air smoke detector
j Supply Air smoke detector
j Smoke detectors -- return and supply air
j Pre--coated Al/Cu condenser coil
j E--coated Al/Cu condenser coil
j E--coated Al/Cu condenser and evaporator coil
j Cu/Cu condenser coil
j Cu/Cu condenser coil and evaporator coil
j Condenser hail guard — louvered style
j CO
sensor
2
OPTIONAL WARRANTIES
j Complete Unit Parts only up to 5 years
j Complete Unit Parts and Labor up to 5 years
Many other optional warranties are available.
See the Commercial Start--Up and Optional Extended
Warranty Price price pages for further information.
FIELD INSTALLED ACCESSORIES
j EconoMi$er IV with controls and barometric relief
— vertical or horizontal
j EconoMi$er2 with 4--20 mA actuator, barometric
relief, and no microprocessor — vertical or horizontal
j Power Exhaust — vertical or horizontal
j Electric heat
j Single point kit
j Two--position motorized outdoor air damper
j Manual outdoor air damper 25%
j Manual outdoor air damper 50%
j Roofcurb — 14 inch (356mm) tall
j Roofcurb — 24 inch (610mm) tall
j Thru--the--bottom utility connection kit
j Thru--the--curb utility connection kit
j Time Guard II compressor anti--cycle control
j Outdoor coil hail guard — louvered style
j Low ambient head pressure controller, down to --20_F
(--29_C)
j Thermostats and Sensors
j Phase Monitor
j Barometric Relief hood (for horizontal economizers)
Economizer Sensors
j Single Dry bulb control
j Differential Dry bulb control
j Single enthalpy control
j Differential enthalpy control
j CO
j CO
-- wall mounted
2
-- duct mounted
2
548J***D
3
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