Bryant 548J*14D Series User manual

548J*14D
SINGLE PACKAGE ROOFTOP
HEAT PUMP
SIZE 14 with PURONR(R--410A) REFRIGERANT
Installation Instructions
548J units for installation in the United States contain use of Bryant's 2-speed indoor fan
control system. This complies with the U.S. Department of Energy (DOE) efficiency standard
of 2018.
548J units for installation outside the United States may or may not contain use of the
2-speed indoor fan control system as they are not required to comply with the U.S.
Department of Energy (DOE) efficiency standard of 2018.
For specific details on operation of the Bryant 2-speed indoor fan system refer to the
Variable Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation,
Setup and Troubleshooting manual.
NOTE: Read the entire instruction manual before starting
the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 3....................
Rated Indoor Airflow (cfm) 4.....................
REFRIGERATION SYSTEM COMPONENTS 7.......
INSTALLATION 9...............................
Jobsite Survey 9................................
Step 1 -- Plan for Unit Location 9..................
Roof Mount 9...............................
Step 2 -- Plan for Sequence of Unit Installation 9......
Curb--Mounted Installation 9...................
Pad--Mounted Installation 9....................
Frame--Mounted Installation 9..................
Step 3 -- Inspect Unit 9...........................
Step 4 -- Provide Unit Support 9...................
Roof Curb Mount 9..........................
Slab Mount (Horizontal Units Only) 11..........
Alternate Unit Support
(In Lieu of Curb or Slab Mount) 11.............
Step 5 -- Field Fabricate Ductwork 11...............
For Units with Accessory Electric Heaters 11.....
Step 6 -- Rig and Place Unit 11....................
Positioning on Curb 11.......................
Step 7 -- Convert to Horizontal and Connect
Ductwork 12...........................
Step 8 -- Install Outside Air Hood 12...............
Economizer Hood Removal and Setup --
Factory Option 12...........................
Two Position Damper Hood Removal and Setup --
Factory Option 13...........................
Economizer Hood and Two--Position Hood 13.....
Step 9 -- Install External Condensate Trap and Line 14.
Step 10 -- Make Electrical Connections 15...........
Field Power Supply 15........................
All Units 16................................
Units Without Factory--Installed
Non--Fused Disconnect 19.....................
Units with Factory--Installed
Non--Fused Disconnect 19.....................
Convenience Outlets 19.......................
Factory--Option Thru--Base Connections 21.......
Units Without Thru--Base Connections 21........
Field Control Wiring 21.......................
Thermostat 21...............................
Central Terminal Board 22......................
Commercial Defrost Control 22..................
Unit Without Thru--Base Conversion Kit 24.......
Heat Anticipator Settings 24...................
Electric Heaters 24............................
Single Point Boxes 25........................
Heater and Supplementary Fuses 25.............
Heater Low--Voltage Control Connections 25......
2--Speed Indoor Fan Motor System with Variable
Frequency Drive (Factory--Installed Option) 26......

2
EconoMi$erRX (Factory--Installed Option) 27......
Product Description 27........................
System Components 27.......................
Specifications 27..............................
W7220 Economizer Module 27.................
Electrical 27................................
Inputs 27...................................
Outputs 28.................................
Environmental 28............................
S--Bus Sensor Wiring 28......................
CO2Sensor Wiring 29........................
Interface Overview 29..........................
User Interface 29............................
Keypad 29.................................
Menu Structure 30.............................
Setup and Configuration 30.....................
Time--out and Screensaver 30..................
Sequence of Operation 36.......................
Enthalpy Settings 40...........................
Two--Speed Fan Operation 40....................
Checkout 41.................................
Power Up 41................................
Initial Menu Display 41.......................
Power Loss (Outage or Brownout) 41............
Status 41...................................
Checkout Tests 41...........................
Troubleshooting 41............................
Alarms 41..................................
Clearing Alarms 41..........................
RTU Open Controller System 42...................
Supply Air Temperature (SAT) Sensor 44.........
Outdoor Air Temperature (OAT) Sensor 44.......
EconoMi$er 2 45............................
Field Connections 45..........................
Space Temperature (SPT) Sensors 45............
Indoor Air Quality (CO2)Sensor 46.............
Outdoor Air Quality Sensor 47.................
Space Relative Humidity Sensor 47.............
Smoke Detector/Fire Shutdown (FSD) 47.........
Connecting Discrete Inputs 47..................
Communication Wiring -- Protocols 48............
General 48.................................
Local Access 49..............................
RTU Open Controller Troubleshooting 49........
Outdoor Air Enthalpy Control 50.................
Differential Enthalpy Control 50................
Return Air Enthalpy Sensor 50.................
Smoke Detectors 51.............................
Step 11 -- Adjust Factory--Installed Options 52........
Step 12 -- Install Accessories 52...................
Step 13 -- Check Belt Tension 52...................
UNIT START--UP CHECKLIST 55..................

3
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70,
National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
safety--alert symbol . When you see this symbol on the
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety--alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.
!WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puronr(R--410A) refrigerant systems operate at
higher pressures than standard R--22 systems. Do not
use R--22 service equipment or components on Puron
refrigerant equipment.
!WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal
injury or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
!WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
heat pump units.
CAUTION
!

4
Rated Indoor Airflow (cfm)
The table to the right lists the rated indoor airflow used
for the AHRI efficiency rating for the units covered in this
document.
Model Number Full Load Airflow (cfm)
548J*14D 4500
Model
J - Puron
®
(R-410A) Refrigerant
Unit Type
548 - Packaged Heat Pump with
optional electric heat
Packaging and 2-Speed Indoor Fan Motor
A = Standard Packaging, electro-mechanical
controls, requires W7212 EconoMi$er
®
IV
B = LTL Packaging, electro-mechanical controls,
requires W7212 EconoMi$er IV
C = Standard Packaging, electro-mechanical
controls, requires W7220 EconoMi$er X
D = Standard Packaging and 2-Speed Indoor
Fan Motor (VFD) controller
E = LTL Packaging and 2-Speed Indoor Fan
Motor (VFD) controller
F = LTL Packaging, electro-mechanical controls,
requires W7220 EconoMi$er X
Cooling Tons
14 - 12.5 tons
Heat Level
(Field installed electric heaters available)
000 = No Heat
Indoor Fan Options
1 = Standard Static Option
2 = Medium Static Option
C = High Static Option with High Efficiency Motor
Refrig. System/Gas Heat Options
D = Two-Stage cooling models
Coil Options (Outdoor - Indoor - Hail Guard)
A = Al/Cu - Al/Cu
B = Precoat Al/Cu - Al/Cu
C = E-coat Al/Cu - Al/Cu
D = E-coat Al/Cu - E-coat Al/Cu
E = Cu/Cu - Al/Cu
F = Cu/Cu - Cu/Cu
M = Al/Cu -Al/Cu — Louvered Hail Guard
N = Precoat Al/Cu - Al/Cu — Louvered Hail Guard
P = E-coat Al/Cu - Al/Cu — Louvered Hail Guard
Q = E-coat Al/Cu - E-coat Al/Cu — Louvered Hail Guard
R = Cu/Cu - Al/Cu — Louvered Hail Guard
S = Cu/Cu - Cu/Cu — Louvered Hail Guard
Voltage
E = 460-3-60
P = 208/230-3-60
T = 575-3-60
Example:
Position:
548J 14 00 1B0AA
1234
P
56 7
D
89
10
0
11
A
12 13 14 15 16 17
Factory Installed Options
0A = None
NOTE: See the 548J 6 to 12.5 ton Price Pages for
a complete list of factory installed options.
Outdoor Air Options
A = None
B = Temperature Economizer, Barometric Relief,
Standard Leak (W7212 or W7220)
E = Temperature Economizer, Barometric Relief,
Standard Leak w/CO
2
, (W7212 or W7220)
H =
Enthalpy Economizer, Barometric Relief,
Standard Leak, (W7212 or W7220)
L =
Enthalpy Economizer,Barometric Relief,
Standard Leak w/CO
2
, (W7212 or W7220)
Q = Motorized 2 Position Damper
U = Temperature
Economizer, Barometric Relief,
Ultra Low Leak, (W7220)
W = Enthalpy Economizer, Barometric Relief,
Ultra Low Leak, (W7220)
a548J---010
Fig. 1 -- 548J*14D Model Number Nomenclature (Example)

5
a548J---011
Fig. 2 -- Unit Dimensional Drawing – Size 14 Unit

6
a548J---012
Fig. 2 -- Unit Dimensional Drawing – Size 14 Unit (cont)

7
CD
A
B
C09897B
LOCATION DIMENSION CONDITION
A
48--- in (1219 mm)
18--- in (457 mm)
18--- in (457 mm)
12--- in (305 mm)
Unit disconnect is mounted on panel
No disconnect, convenience outlet option
Recommended service clearance
Minimum clearance
B
42--- in (1067 mm)
36--- in (914 mm)
Special
Surface behind servicer is grounded (e.g., metal, masonry wall)
Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
Check sources of flue products within 10--- ft of unit fresh air intake hood
C36--- in (914 mm)
18--- in (457 mm)
Side condensate drain is used
Minimum clearance
D42--- in (1067 mm)
36--- in (914 mm)
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)
Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass)
NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any application
planning overhead obstruction or for vertical clearances.
Fig. 3 -- Service Clearance Dimensional Drawing
REFRIGERATION SYSTEM
COMPONENTS
Each heat pump refrigeration system includes a
compressor, accumulator, reversing valve, dual--function
outdoor coil with vapor header check valve, cooling liquid
line with a filter drier and a check valve, dual--function
indoor coil with a vapor header check valve, and heating
liquid line with a check valve and a strainer. Size 14 units
have two compressor--circuits. See Fig. 4 for typical unit
piping schematic (4--row indoor coil with two
compressor--circuits is shown).
Dual--function outdoor and indoor coils are designed to
provide parallel coil circuits during evaporator--function
operation and converging coil circuits during the
condenser--function operation.
Reversing Valve and Check Valve Position
See Fig. 4 (on page 8) and Tables 1 -- 3.
Troubleshooting Refrigerant Pressure Problems and
Check Valves
Refer to Fig. 4 and the Cooling Mode and Heating Mode
tables (Tables 1 and 2).
Refrigerant System Pressure Access Ports
There are two access ports in each circuit -- on the suction
tube and the discharge tube near the compressor. These are
brass fittings with black plastic caps. The hose connection
fittings are standard 1/4--inch SAE male flare couplings.
The brass fittings are two--piece High Flow valves, with a
receptacle base brazed to the tubing and an integral
spring--closed check valve core screwed into the base. See
Fig. 5 on page 8. This check valve is permanently
assembled into this core body and cannot be serviced
separately. Replace the entire core body if necessary. Service
tools are available from Replacement Components that
allow the replacement of the check valve core without
having to recover the entire system refrigerant charge. Apply
compressor refrigerant oil to the check valve core’s bottom
O--ring. Install the fitting body and torque to 96 10 in--lbs
(10.9 1 Nm). Do not exceed 106 in--lbs (11.9 Nm) when
tightening.
Table 1 – Cooling Mode (each circuit)
Component Status/Position
Reversing Valve Energized
Check Valve A Closed
Check Valve B Open
Check Valve C Closed
Check Valve D Open

8
Table 2 – Heating Mode (each circuit)
Component Status/Position
Reversing Valve De--- energized
Check Valve A Open
Check Valve B Closed
Check Valve C Open
Check Valve D Closed
Table 3 – Defrost Mode
Component Status/Position
Defrost Thermostat Closed
Outdoor Fan(s) Off
Reversing Valve Energized
Check Valve A Closed
Check Valve B Open
Check Valve C Closed
Check Valve D Open
COMPRESSOR
ACCUMULATOR
HPS
COMPRESSOR
ACCUMULATOR
HPS
Filter
Drier 2B
1B
LPS/LOC
Acutrol DFT 1
Cooling Liquid Lines
DFT 2
2A
1A
1D
2D
Outdoor Coil
Indoor Coil
Comp 2
Comp 1
2C
1C Strainer
Heating Mode Liquid Lines
Acutrol
Reversing
Valve
Reversing
Valve
C160139
Fig. 4 -- Typical Unit Piping Schematic
5/8” HEX 0.47
30°
0.596
1/2-20 UNF RH
1/2” HEX
45°
WASHER
O-RING
7/16-20 UNF RH
DEPRESSOR PER AHRI 720
+.01/-.035
FROM FACE OF BODY
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
SEAT CORE
(Part No. EC39EZ067)
a548J---009
Fig. 5 -- CoreMax* Access Port Assembly
* CoreMax is a registered trademark of Fastest, Inc.

9
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installa-
tion requirements.
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb
or other) that provides for at least the minimum clearances
required for safety. This includes the clearance to
combustible surfaces, unit performance and service access
below, around and above unit as specified in unit
drawings. See Fig. 3.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof--covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents , relief valves, or other sources of
contaminated air.
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
the unit.
Select a unit mounting system that provides adequate
height to allow for removal and disposal of frost and ice
that will form during the heating--defrost mode as well as
allow installation of condensate trap per requirements.
RefertoStep9—InstallExternalCondensate Trap and
Line – for required trap dimensions.
Roof Mount —
Check building codes for weight distribution
requirements. Unit operating weight is shown in Table 4.
Table 4 – Operating Weights
548J*14D UNITS LB (KG)
Base Unit 1370 (620)
Economizer
Vertical 100 (45)
Horizontal 115 (52)
Powered Outlet 32 (15)
Curb
14---in/356 mm 180 (82)
24---in/610 mm 235 (107)
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example,
on curb--mounted units, some accessories must be
installed on the unit before the unit is placed on the curb.
Review the following for recommended sequences for
installation steps.
Curb--Mounted Installation —
Install curb
Install field--fabricated ductwork inside curb
Install accessory thru--base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 9 for
details)
Rig and place unit
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Pad--Mounted Installation —
Prepare pad and unit supports
Check and tighten the bottom condensate drain
connection plug
Rig and place unit
Convert unit to side duct connection arrangement
Install field--fabricated ductwork at unit duct openings
Install outdoor air hood
Install condensate line trap and piping
Make electrical connections
Install other accessories
Frame--Mounted Installation —
Frame--mounted applications generally follow the
sequence for a curb installation. Adapt as required to
suit specific installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim
with transportation agency.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 6. Assemble and install accessory roof curb in
accordance with instructions shipped with the curb.
NOTE: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with
the roof curb as shown in Fig. 5. Improperly applied
gasket can also result in air leaks and poor unit
performance.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 7. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.

10
a548J---013
Fig. 6 -- Roof Curb Details