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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

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.

Содержание 548J*14D Series

Страница 1: ...n 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...

Страница 2: ...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 Tem...

Страница 3: ...evere 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 produc...

Страница 4: ...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 Hai...

Страница 5: ...5 a548J 011 Fig 2 Unit Dimensional Drawing Size 14 Unit...

Страница 6: ...6 a548J 012 Fig 2 Unit Dimensional Drawing Size 14 Unit cont...

Страница 7: ...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...

Страница 8: ...ter 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 C16...

Страница 9: ...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 I...

Страница 10: ...10 a548J 013 Fig 6 Roof Curb Details...

Страница 11: ...th applicable fire codes For Units with Accessory Electric Heaters All installations require a minimum clearance to combustible surfaces of 1 in 25 mm from duct for first 12 in 305 mm away from unit P...

Страница 12: ...option may be field converted to horizontal ducted configuration using accessory CRDUCTCV001A00 To convert to horizontal configuration remove screws from side duct opening covers and remove covers Di...

Страница 13: ...3 Be careful to not damage any wiring or cut tie wraps securing any wiring 4 Carefully lift the hood assembly with metal tray through the filter access opening and assemble per the steps outlined in E...

Страница 14: ...bottom See Fig 17 Unit airflow configuration does not determine which drain connection to use Either drain connection can be used with vertical or horizontal applications When using the standard side...

Страница 15: ...out through the curb power conduit must be used to route the main power from the condenser end of the unit to either the factory option disconnect the bottom of the control box or the single point box...

Страница 16: ...peration or performance satisfaction Do not connect aluminum wire between disconnect switch and furnace Use only copper wire See Fig 24 WARNING COPPER WIRE ONLY ELECTRIC DISCONNECT SWITCH ALUMINUM WIR...

Страница 17: ...17 a50 9707 Fig 26 Typical 548J Size 14 Control Wiring Diagram...

Страница 18: ...is 230 3 60 AB 224 v BC 231 v AC 226 v Average Voltage 224 231 226 681 227 3 3 Determine maximum deviation from average voltage AB 227 224 3 v BC 231 227 4 v AC 227 226 1 v Maximum deviation is 4 v De...

Страница 19: ...he shaft to the NFD 8 Turn the handle to the OFF position with red arrow pointing at OFF 9 Install the handle on to the painted cover horizontally with the red arrow pointing to the left 10 Secure the...

Страница 20: ...factory disconnect option route the wires through the web bushing located on the bottom of the disconnect box For the load side wiring to the factory option disconnect route the wires through the hole...

Страница 21: ...onduit may be attached to the connectors on the basepan Pull correctly rated high voltage and low voltage wires through appropriate conduits Connect the power conduit to the internal disconnect if uni...

Страница 22: ...5 for details of DFB Inputs and Outputs DIP Switches Speed Up Jumpers C09275 Fig 35 Defrost Control Board Arrangement Reversing valve control The DFB has two outputs for unit reversing valve control O...

Страница 23: ...6 COMP 2 DO 24Vac P3 8 FPT2 REHEAT HP 8 HEAT 2 DO 24Vac E HEAT TB4 1 COM 24Vac P3 3 TB4 3 Configuration Point Name Type of I O Connection Pin Number Unit Connection Note Select Jumper 24Vac P1 1 2 Com...

Страница 24: ...passes into the control box Pull the wires over to the terminal strip at the upper left corner of the Central Terminal Board CTB Use the connector at the control box and the wire tie to ensure that th...

Страница 25: ...ypical Single Point Installation Heater and Supplementary Fuses When the unit MOCP device value exceeds 60 A unit mounted supplementary fuses are required for each heater circuit These fuses are inclu...

Страница 26: ...rd terminals C10354 Fig 41 Accessory Electric Heater Control Connections 2 Speed Indoor Fan Motor System with Variable Frequency Drive Factory Option For details on operating 548J 2 stage cooling unit...

Страница 27: ...ifications 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 s...

Страница 28: ...Table 7 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 NT...

Страница 29: ...e 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 se...

Страница 30: ...ters 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...

Страница 31: ...nsor 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...

Страница 32: ...ault 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 t...

Страница 33: ...ES 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...

Страница 34: ...or 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 de...

Страница 35: ...e 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...

Страница 36: ...tage of mechanical cooling Y2 O after the delay if the call for Y1 I and Y2 I have not been satisfied Table 14 Dry Bulb Operation With DCV CO2 Sensor 1 Speed Fan Demand Controlled Ventilation DCV Outs...

Страница 37: ...ed 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...

Страница 38: ...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...

Страница 39: ...on 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...

Страница 40: ...y the economizer sets the economizing mode to YES economizing is available When all of the OA conditions are above the selected boundary the conditions are not good to economize and the mode is set to...

Страница 41: ...Use the Checkout menu on page 34 to test the damper operation and any configured outputs Only items that are configured are shown in the Checkout menu All settings are stored in non volatile flash mem...

Страница 42: ...of all connections to the RTU Open 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 J...

Страница 43: ...43 a50 9711 Fig 49 RTU Open Controller System Wiring Diagram...

Страница 44: ...elay 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...

Страница 45: ...or zoning system However it is still recommended that return air duct sensor be installed to allow stand alone operation for back up Refer to the configuration section for details on controller config...

Страница 46: ...ce 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...

Страница 47: ...us 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...

Страница 48: ...s network address See Fig 60 and 61 for protocol switch settings and address switches The third party connection to the RTU Open controller is through plug J19 See Fig 62 for wiring NOTE Power must b...

Страница 49: ...am included with the purchase of the Tech Tool Kit USB TKIT This is a field Tech Tool to set up service or download application software to the RTU Open controller and includes a USB Link Cable The li...

Страница 50: ...the RTU Open Multi Protocol Controller Controls Start Up Operation and Troubleshooting manual Contact your Bryant applications engineer for details on configuration and troubleshooting of connected ne...

Страница 51: ...ke detectors require a relocation of the sensor module at unit installation See Fig 66 for the as shipped location Return Air Smoke Detector as shipped C12282 Fig 66 Return Air Smoke Detector Shipping...

Страница 52: ...signal and integrated barometric relief Power exhaust Differential dry bulb sensor EconoMi er IV Outdoor enthalpy sensor Differential enthalpy sensor Time Guard II compressor anti cycle control Outdo...

Страница 53: ...o reduce tension or away from the fan to increase tension Ensure the blower shaft and motor shaft are parallel to each other pulleys aligned Tighten all bolts securely when finished C160146 Fig 69 V B...

Страница 54: ...ght to discontinue or change at any time specifications or designs without notice and without incurring obligations E2017 Bryant Heating Cooling Systems Edition Date 12 17 Printed in U S A Replaces II...

Страница 55: ...OR 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 BE...

Страница 56: ...EFRIGERANT CHARGE 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 Manufac...

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