Bryant 549J Series Installation Instructions Manual Download Page 9

Page: 9 / 52

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

LPS/LOC

Acutrol

DFT 1

Cooling Liquid Lines

DFT 2

Outdoor Coil

Indoor Coil

Comp 2

Comp 1

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.

Summary of Contents for 549J Series

Page 1: ...all 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 ...

Page 2: ...ly 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 fo...

Page 3: ... 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 Louver...

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

Page 5: ...5 C160145 Fig 2 Unit Dimensional Drawing 07 08 Size Units cont ...

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

Page 7: ...7 C10758A Fig 3 Unit Dimensional Drawing 09 Size Unit cont ...

Page 8: ... 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 Refrigeran...

Page 9: ... 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 provid...

Page 10: ...allation 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 instruct...

Page 11: ...ION OF CARRIER CORPORATION 1 DEC 2 DEC 3 DEC ANG MATERIAL AUTHORIZATION NUMBER TITLE 1029120 CURB ASY ROOF ENGINEERING MANUFACTURING ENGINEERING REQUIREMENTS SIZE DRAWING NUMBER REV T 005 Y 002 DRAFTER CHECKER D 50HJ405012 C WEIGHT MMC 12 16 09 SHEET 5 OF 5 SURFACE FINISH MFG PURCH MODEL INTERNAL USE ONLY NEXT DRAWING SCALE DISTRIBUTION PURCH N A NOTES 1 ROOFCURB ACCESSORY IS SHIPPED DISASSEMBLED ...

Page 12: ...ints and roof openings with counter flashing and mastic in accordance with applicable codes Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier If a plenum return is used on a vertical unit the return should be ducted through the roof deck to comply with applicable fire codes PROPERTY DAMAGE HAZARD Failure to follow this caution may result in damage to roo...

Page 13: ...ance between the roof curb and the base rail inside on the condenser end of the unit being approximately 1 4 in 6 4 mm Although unit is weatherproof guard against water from higher level runoff and overhangs For size 08 and 09 units after unit is in position remove the compressor access panel Holding the blocking between compressors with one hand cut the strapping Carefully remove the blocking wit...

Page 14: ...t the hood assembly with metal tray through the filter access opening and assemble per the steps outlined in Economizer Hood and Two Position Hood Economizer Hood and Two Position Hood NOTE If the power exhaust accessory is to be installed on the unit the hood shipped with the unit will not be used and must be discarded Save the aluminum filter for use in the power exhaust hood assembly 1 The indo...

Page 15: ...l units must have an external trap for condensate drainage Install a trap at least 4 in 102 mm deep and protect against freeze up If drain line is installed downstream from the external trap pitch the line away from the unit at 1 in per 10 ft 25 mm in 3 m of run Do not use a pipe size smaller than the unit connection 3 4 in Step 10 Make Electrical Connections ELECTRICAL SHOCK HAZARD Failure to fol...

Page 16: ...m wire between disconnect switch and furnace Use only copper wire See Fig 19 COPPER WIRE ONLY ELECTRIC DISCONNECT SWITCH ALUMINUM WIRE A93033 Fig 19 Disconnect Switch and Unit Units with Factory Installed Non Fused Disconnect The factory installed option non fused disconnect NFD switch is located in a weatherproof enclosure located under the main control box The manual switch handle and shaft are ...

Page 17: ...gs on the power terminal block or at factory installed option non fused disconnect NOTE Check all factory and field electrical connections for tightness Convenience Outlets ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death Units with convenience outlet circuits may use multiple disconnects Check convenience outlet for power status before opening un...

Page 18: ... disconnect switch or HACR switch is open Other connection methods will result in the convenience outlet circuit being de energized when the unit disconnect or HACR switch is open See Fig 24 Using unit mounted convenience outlets Units with unit mounded convenience outlet circuits will often require that two disconnects be opened to de energize all power to the unit Treat all units as electrically...

Page 19: ...diately Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components Such operation would invalidate any applicable Bryant warranty Field Control Wiring The 549J unit requires an external temperature control device This device can be a thermostat emulation device provided as part of a third party Building Management System or the R...

Page 20: ...ve control Operation of the reversing valves is based on internal logic this application does not use an O or B signal to determine reversing valve position Reversing valves are energized during the cooling stages and the defrost cycle and de energized during heating cycles Once energized at the start of a cooling stage the reversing valve will remain energized until the next heating cycle demand ...

Page 21: ... DFT2 is open Defrost The defrost control mode is a time temperature sequence There are two time components The continuous run period and the test defrost cycle period The temperature component is provided by Defrost Thermostat 1 and 2 DFT1 and DFT2 08 09 only mounted on the outdoor coil The continuous run period is a fixed time period between the end of the last defrost cycle or start of the curr...

Page 22: ...h the indoor access panel Heater modules slide into the compartment on tracks along the bottom of the heater opening See Fig 32 Fig 33 and Fig 34 Not all available heater modules may be used in every unit Use only those heater modules that are UL listed for use in a specific size unit Refer to the label on the unit cabinet for the list of approved heaters Unit heaters are marked with Heater Model ...

Page 23: ...0 A Note that all heaters are qualified for use with a 60 A fuse regardless of actual heater ampacity so only 60 A fuses are necessary Single Point Boxes without Fuses Unit heater applications not requiring supplemental fuses require a special Single Point Box without any fuses The accessory Single Point Boxes contain a set of power taps and pigtails to complete the wiring between the Single Point...

Page 24: ...CV Specifications W7220 Economizer Module The module is designed for use with 2 to 10 Vdc or bus communicating actuator The module includes terminals for CO2 sensor mixed air sensor and an outdoor dry bulb sensor Enthalpy and other options are available with bus sensors User Interface Provides status for normal operation setup parameters checkout tests and alarm and error conditions with a 2 line ...

Page 25: ...r Table 8 Economizer Module Left Hand Terminal Blocks Label Type Description Top Left Terminal Block MAT MAT 20k NTC and COM Supply Air Temperature Sensor polarity insensitive connection OAT OAT 20k NTC and COM Outdoor Air Temperature Sensor polarity insensitive connection S BUS S BUS S Bus Sylk Bus Enthalpy Control Sensor polarity insensitive connection Bottom Left Terminal Block IAQ 2 10 2 10 Vd...

Page 26: ...ble CO2 Sensor Wiring When using a CO2 sensor the black and brown common wires are internally connected and only one is connected to IAQ COM on the W7220 Use the power from the W7220 to power the CO2 sensor OR make sure the ground for the power supplies are common See Fig 40 for CO2 sensor wiring CO2 SENSOR 24V ANALOG OUT L1 HOT L2 RED BLACK YELLOW BROWN ORANGE GREEN POWER SUPPLY PROVIDE DISCONNEC...

Page 27: ...eters appear and only MIN POS will display If you have a CO2 sensor the DCV MIN and DCV MAX will appear AND if you have 2 speed fan DCV MIN high and low speed and DCV MAX high and low speed will appear NOTE Some parameters in the menus use the letters MA or MAT indicating a mixed air temperature sensor location before the cooling coil This unit application has the control sensor located after the ...

Page 28: ...ensor sends invalid value if not connected short or out of range RA HUM _ _ 0 to 100 RETURN AIR RELATIVE HUMIDITY Accessory enthalpy sensor required Displays measured value of return air humidity from RA sensor Displays if sensor sends invalid value if not connected short or out of range IN CO2 _ _ _ ppm 0 to 2000 ppm SPACE RETURN AIR CO2 CO2 sensor required accessory or factory option Displays va...

Page 29: ...fault for MIN POS L is 3 2V and MIN POS H is 2 8V VENTMAX 2 8 V 2 to 10 Vdc DCV MAXIMUM DAMPER POSITION Displays only if a CO2 sensor is connected Used for Vbz ventilation max cfm setpoint VENTMAX is the same setting as MIN POS would be if you did not have the CO2 sensor 100 to 9990 cfm increment by 10 If OA MA RA and CO2 sensors are connected and DCV CAL ENABLE is set to AUTO mode the OA dampers ...

Page 30: ...YES LCD will briefly flash YES and change to NO but all parameters will change to the factory default values NOTE RECHECK AUX2 IN and FANTYPE for required 2 speed values ADVANCED SETUP MA LO SET 45_F 7_C 35 to 65_F 2 to 18_C Incremented by 1_ SUPPLY AIR TEMPERATURE LOW LIMIT Temperature to activate Freeze Protection close damper and alarm if temperature falls below setup value FREEZE POS CLO CLO o...

Page 31: ...for an out of calibration discharge air temperature DAT sensor 2SP FAN DELAY 5 Minutes 0 to 20 minutes in 1 minute increments TIME DELAY ON 2nd STAGE ECONOMIZING When in economizing mode this is the delay for the high speed fan to try to satisfy the call for second stage cooling before the first stage mechanical cooling is enabled CHECKOUT DAMPER MINIMUM POSITION n a n a The checkout for the dampe...

Page 32: ...the alarm will go away Must have OA MA and RA sensors for DCV calibration set up is in the Advanced setup menu DA SENS ALM n a n a DISCHARGE AIR TEMPERATURE SENSOR ALARM Discharge air temperature is out of the range set in the ADVANCED SETUP Menu Check the temperature of the discharge air SYS ALARM n a n a When AUX1 O is set to SYS and there is any alarm e g failed sensors etc the AUX1 O terminal ...

Page 33: ...stage of mechanical cooling Y2 O after the delay if the call for Y1 I and Y2 I have not been satisfied Table 15 Dry Bulb Operation With DCV CO2 Sensor 1 Speed Fan Demand Controlled Ventilation DCV Outside Air Good to economize Y1 I Y2 I Fan Speed Y1 O Y2 O Occupied Unoccupied Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On On High 24 v On ...

Page 34: ...sed On Off High 24 v On 0 v Off VENTMIN Closed On On High 24 v On 24 v On VENTMIN Closed Yes Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 0 v Off 0 v Off VENTMIN to Full Open Closed to Full Open On On High 24 v On 0 v Off VENTMIN to Full Open Closed to Full Open Above set No Off Off High 0 v Off 0 v Off VENTMIN to VENTMAX Closed On Off High 24 v On 0 v Off VENTMIN L to VENTMAX Closed On...

Page 35: ...n DCV Outside Air Good to economize Y1 I Y2 I Fan Speed Y1 O Y2 O Occupied Unoccupied Below set No Off Off Low 0 v Off 0 v Off VENTMIN L Closed On Off Low 24 v On 0 v Off VENTMIN L Closed On On High 24 v On 24 v On VENTMIN H Closed Yes Off Off Low 0 v Off 0 v Off VENTMIN L Closed On Off Low 0 v Off 0 v Off VENTMIN L to Full Open Closed to Full Open On On High 24 v On 0 v Off VENTMIN H to Full Open...

Page 36: ...Open Closed to Full Open With stage 3 delay STG3 DLY in Advanced setup menu can turn on second stage of mechanical cooling Y2 O after the delay if the call for Y1 I and Y2 I have not been satisfied With 2SP FAN DELAY Advanced Setup Menu when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second stage cooling by turning on the fan to high and opening ...

Page 37: ...nd fan on high speed and the call will turn off OR S If the call for additional cooling in the space has not been satisfied then the first stage of mechanical cooling will be enabled through Y1 Out or Y2 Out Checkout Inspect all wiring connections at the economizer module s terminals and verify compliance with the installation wiring diagrams For checkout review the Status of each configured param...

Page 38: ...ge Be sure to allow enough time for compressor startup and shutdown between checkout tests so that you do not short cycle the compressors CAUTION Troubleshooting Alarms The economizer module provides alarm messages that display on the 2 line LCD NOTE Upon power up the module waits 60 minutes before checking for alarms This allows time for all the configured devices e g sensors actuator to become o...

Page 39: ...s of all connections to the RTU Open controller board NOTE The RTU Open controller acts as an intelligent imbedded thermostat A room thermostat cannot be used with the RTU Open controller J4 J2 J1 J5 J5 J22 J17 J19 J14 J11 J22 J3 J13 J12 J15 J20 Network Comm Configurable Input_8 24 VAC Configurable Input_5 24 VAC Configurable Input_3 24 VAC Input_9 Humidistat 24 VAC 24 VAC Input _8 Enthalpy AO 1 E...

Page 40: ...40 a549J 001 Fig 44 Typical RTU Open Controller Wiring Diagram ...

Page 41: ...lay State comp_3 BO Relay 24VAC 1A J11 5 and 6 Binary Output 7 Y3 Heat 1 Relay State heat_1 BO Relay 24VAC 1A J1 6 Binary Output 3 W1 Heat 2 Relay State heat_2 BO Relay 24VAC 1A J1 5 Binary Output 2 W2 Power Exhaust Relay State pexh BO Relay 24VAC 1A J11 2 and 3 N O Binary Output 8 PE Dehumidification Relay dehum BO Relay 24VAC 1A J11 7 and 8 N O Binary Output 6 LEGEND AI Analog Input AO Analog Ou...

Page 42: ...that return air duct sensor be installed to allow stand alone operation for back up Refer to the configuration section for details on controller configurations associated with space sensors S 33ZCT55SPT space temperature sensor with override button S 33ZCT56SPT space temperature sensor with override button and setpoint adjustment S 33ZCT59SPT space temperature sensor with LCD liquid crystal displa...

Page 43: ...locate the sensor near a return air grille if present so it senses the concentration of CO2 leaving the space The sensor should be mounted in a location to avoid direct breath contact Do not mount the IAQ sensor in drafty areas such as near supply ducts open windows fans or over heat sources Allow at least 3 ft 0 9 m between the sensor and any corner Avoid mounting the sensor where it is influence...

Page 44: ...tatus of this input when there is no fire alarm Connecting Discrete Inputs Filter Status The filter status accessory is a field installed accessory This accessory detects plugged filters When installing this accessory the unit must be configured for filter status by setting MENU Config Inputs input 3 5 8 or 9 to Filter Status and normally open N O or normally closed N C Input 8 or 9 is recommended...

Page 45: ... address See Fig 55 and 56 for protocol switch settings and address switches The third party connection to the RTU Open controller is through plug J19 See Fig 57 for wiring NOTE Power must be cycled after changing the SW1 3 switch settings Contact your Bryant applications engineer for more detailed information on protocols third party wiring and networking SW3 Protocol Selection PROTOCOL DS8 DS7 D...

Page 46: ...includes a USB Link Cable The link cable connects a USB port to the J12 local access port See Fig 58 RTU Open Controller Troubleshooting Communication LEDs The LEDs indicate if the controller is speaking to the devices on the network The LEDs should reflect communication traffic based on the baud rate set The higher the baud rate the more solid the LEDs will appear See Table 24 NOTE Refer to the R...

Page 47: ...Enthalpy Control P N 33CSENTHSW The enthalpy control 33CSENTHSW is available as a field installed accessory to be used with the EconoMi er2 damper system The outdoor air enthalpy sensor is part of the enthalpy control The separate field installed accessory return air enthalpy sensor 33CSENTSEN is required for differential enthalpy control See Fig 59 7 CTB ECON RTU Open to J2 6 LOW GND 24V Enthalpy...

Page 48: ... Make sure that the elbow fitting is pointing down See Fig 62 Step 2 3 Screw the sensor and detector plate into its operating position using screws from Step 1 See Fig 62 Step 3 4 Connect the flexible tube on the sampling inlet to the sampling tube on the basepan Additional Application Data Refer to the Application Data sheet titled Factory Installed Smoke Detectors For Small And Medium Rooftop Un...

Page 49: ...4 For example if the belt span length is 32 inches 32 x 1 64 1 2 inch deflection Belt Force Deflection Method Check the belt tension with a spring force belt force deflection gauge 1 Place a straightedge along the belt between the two pulleys Measure the distance between the motor shaft and the blower shaft 2 Set the tension gauge to the desired tension see Table 1 in Fig 64 Place the large O ring...

Page 50: ...NTING BOLTS 4 C11504 Fig 65 Belt Drive Motor Mounting Copyright 2018 Bryant Heating Cooling Systems Edition Date 01 18 Printed in U S A Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No II549J 7 9 04 Replaces II549J 7 9 03 ...

Page 51: ...OOR AIR INLET SCREENS ARE IN PLACE j VERIFY THAT UNIT IS LEVEL j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND VERIFY SETSCREW IS TIGHT j VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED j VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION j VERIFY INSTALLATION OF THERMOSTAT II START UP COOLING CYCLE ELECTRICAL SUPPLY VOLTAGE L1 L2 L2 L3 L...

Page 52: ...RGE USING CHARGING CHARTS GENERAL j ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS IF EQUIPPED j VERIFY SMOKE DETECTOR UNIT SHUTDOWN BY UTILIZING MAGNET TEST REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS Copyright 2018 Bryant Heating Cooling Systems Edition Date 01 18 Printed in U S A Manufacturer reserves the right to change at any time specifications and designs without notice and...

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