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

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.

548J

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.

548J

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

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

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.

548J

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.

548J

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.

548J

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.

548J

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.

548J

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

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