Bryant 549J Series User manual

1
549J
SINGLE PACKAGE ROOFTOP
HEAT PUMP
SIZES 07 -- 09 with PURONR(R--410A) REFRIGERANT
Installation Instructions
NOTE: Read the entire instruction manual before starting
the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 2....................
Rated Indoor Airflow (cfm) 3.....................
REFRIGERATION SYSTEM COMPONENTS 8.......
INSTALLATION 10..............................
Jobsite Survey 10...............................
Step 1 -- Plan for Unit Location 10.................
Roof Mount 10..............................
Step 2 -- Plan for Sequence of Unit Installation 10.....
Curb--Mounted Installation 10..................
Pad--Mounted Installation 10...................
Frame--Mounted Installation 10.................
Step 3 -- Inspect Unit 10..........................
Step 4 -- Provide Unit Support 10..................
Roof Curb Mount 10.........................
Slab Mount (Horizontal Units Only) 12..........
Alternate Unit Support
(In Lieu of Curb or Slab Mount) 12.............
Step 5 -- Field Fabricate Ductwork 12...............
For Units with Accessory Electric Heaters 12.....
Step 6 -- Rig and Place Unit 12....................
Positioning on Curb 13.......................
Step 7 -- Convert to Horizontal and Connect
Ductwork 13...........................
Step 8 -- Install Outside Air Hood 14...............
Economizer and Two Position Damper Hood
Package Removal and Setup — Factory Option 14..
Economizer Hood and Two--Position Hood 14.....
Step 9 -- Install External Condensate Trap
and Line 15............................
Step 10 -- Make Electrical Connections 15...........
Field Power Supply 15........................
Units with Factory--Installed
Non--Fused Disconnect 16.....................
Units Without Factory--Installed
Non--Fused Disconnect 17.....................
All Units 17................................
Convenience Outlets 17.......................
Factory Option Thru--Base Connections 18.......
Units Without Thru--Base Connections 19........
All Units 19................................
Field Control Wiring 19.......................
Thermostat 19...............................
Central Terminal Board 20......................
Commercial Defrost Control 20..................
Unit Without Thru--Base Connection Kit 22.......
Heat Anticipator Settings 22...................
Electric Heaters 22............................
Single Point Boxes & Supplementary Fuses 23....
Single Point Boxes without Fuses 23............
Low--Voltage Control Connections 23............
Variable Frequency Drive (VFD) 2--Speed
Indoor Fan Motor System (Factory--Installed) 23....
EconoMi$erRX (Factory--Installed Option) 24......
Product Description 24........................
System Components 24.......................
Specifications 24..............................
W7220 Economizer Module 24.................
Electrical 24................................
Inputs 24...................................
Outputs 25.................................
Environmental 25............................
Economizer Module Wiring Details 25...........
S--Bus Sensor Wiring 25......................
CO2Sensor Wiring 26........................
Interface Overview 26..........................
User Interface 26............................
Keypad 26.................................
Menu Structure 27.............................
Setup and Configuration 27.....................
Time--out and Screensaver 27..................
Sequence of Operation 33.......................
Enthalpy Settings 36...........................
Two--Speed Fan Operation 36....................
Checkout 37.................................
Power Up 37................................
Initial Menu Display 37.......................

2
Power Loss (Outage or Brownout) 38............
Status 38...................................
Checkout Tests 38...........................
Troubleshooting 38............................
Alarms 38..................................
Clearing Alarms 38..........................
2--Speed Indoor Fan Control System with Variable
Frequency Drive (Factory--Installed Option) 38.......
RTU Open Controller System 39.................
Supply Air Temperature (SAT) Sensor 41.........
Outdoor Air Temperature (OAT) Sensor 41.......
EconoMi$erR242...........................
Field Connections 42..........................
Space Temperature (SPT) Sensors 42............
Indoor Air Quality (CO2)Sensor 43.............
Outdoor Air Quality Sensor 44.................
Space Relative Humidity Sensor or Humidistat 44..
Smoke Detector/Fire Shutdown (FSD) 44.........
Connecting Discrete Inputs 44..................
Communication Wiring -- Protocols 45............
General 45.................................
Local Access 46.............................
RTU Open Controller Troubleshooting 46........
Outdoor Air Enthalpy Control 47.................
Differential Enthalpy Control 47................
Return Air Enthalpy Sensor 47.................
Smoke Detectors 48...........................
Additional Application Data 48.................
Step 11 -- Adjust Factory--Installed Options 48........
Step 12 -- Install Accessories 49...................
Step 13 -- Check Belt Tension 49...................
UNIT START--UP CHECKLIST 51..................
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

3
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
!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)
549J*07A 2400
549J*07D 2400
549J*08D 3000
549J*09D 3400
Model
J - Puron
®
(R-410A) Refrigerant
Unit Type
549 - High Efficiency
Packaged Heat Pump
with optional electric heat
Packaging & 2-Speed Indoor Fan Motor
A = Standard Packaging, electro-mechanical
controls that require W7212 EconoMi$er
®
IV
B = LTL Packaging, electro-mechanical controls
that require W7212 EconoMi$er IV
C = Standard Packaging, electro-mechanical
controls that require W7220 EconoMi$er X
D = Standard Packaging and 2 speed indoor
fan motor
E = LTL Packaging and 2 speed indoor fan motor
F = LTL Packaging, electro-mechanical controls
that require W7220 EconoMi$er X
Cooling Tons
07 - 6 tons
08 - 7.5 tons
09 - 8.5 tons
Heat Level
(Field installed electric heaters available)
000 = No Heat
Indoor Fan Options
1 = Standard Static Option
2 = Medium Static Option
3 = High Static/ Option
Refrig. System/Gas Heat Options
A = One-Stage cooling models
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:
549JP08D000A1B0AA
123456789
10 11 12 13 14 15 16 17
Factory Installed Options
0A = None
NOTE: See the 549J 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)
a549J---007
Fig. 1 -- 549J 07--09 Model Number Nomenclature (Example)

4
C160144
Fig. 2 -- Unit Dimensional Drawing: 07 — 08 Size Units

5
C160145
Fig. 2 -- Unit Dimensional Drawing: 07 — 08 Size Units (cont.)

6
C10757A
Fig. 3 -- Unit Dimensional Drawing: 09 Size Units

7
C10758A
Fig. 3 -- Unit Dimensional Drawing: 09 Size Unit (cont.)

8
C
D
A
B
C11247
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. 4 -- 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 check a valve and a strainer. Size 07 units
have a single compressor--circuit; unit sizes 08 through 09
have two compressor--circuits. See Fig. 5 for typical unit
piping schematic (unit size 09 (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. 5 (on page 9) and Tables 1, 2, and 3.
Troubleshooting Refrigerant Pressure Problems and
Check Valves
Refer to Fig. 5 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--in. 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. 6 on page 9. 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 RCD 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

9
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
C09228
Fig. 5 -- Typical Unit Piping Schematic (with TXV valves on Indoor Coils)
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. 6 -- CoreMax* Access Port Assembly
* CoreMax is a registered trademark of Fastest, Inc.

10
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 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. 4.
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 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
549J* UNITS LB (KG)
07 08 09
Base Unit 710 (322) 875 (397) 1020 (463)
Economizer
Vertical 80 (36) 80 (36) 80 (36)
Horizontal 105 (48) 105 (48) 105 (48)
Powered Outlet 32 (15) 32 (15) 32 (15)
Curb
14--- in. / 356mm 110 (50) 110 (50) 110 (50)
24--- in. / 610mm 145 (66) 145 (66) 145 (66)
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.
On units with hinged panel option, check to be sure all
latches are snug and in closed position.
Locate the carton containing the outside air hood parts;
see Fig. 12 (on page 14). Do not remove carton until unit
has been rigged and located in final position.
Step 4 — Provide Unit Support
Roof Curb Mount —
Accessory roof curb details and dimensions are shown in
Fig. 7. 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. 7. Improperly applied
gasket can also result in air leaks and poor unit
performance.