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2. Set the tension gauge to the desired tension (see Table 1

in Fig. 67). Place the large O--ring at that point.

3. Press the tension checker downward on the belt until

the large O--ring is at the bottom of the straightedge.

4. Adjust the belt tension as needed.

Adjust belt tension by loosing the motor mounting plate

front bolts and rear bolt (see Fig. 68) and slide the plate

towards the fan (to 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. 67 -- V--Belt Force Label

BLOWER PULLEY

V-BELT

MOTOR
PULLEY

MOTOR

MOTOR MOUNTING

PLATE

MOUNTING

BOLTS (4)

C11504

Fig. 68 -- Belt Drive Motor Mounting

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

2018 Bryant Heating & Cooling Systems

Edition Date: 01/18

Printed in U.S.A.

Replaces: II548J--- 17--- 24--- 01

Catalog No. II548J---17---24---02

Содержание 548J*17 D Series

Страница 1: ...me Mounted Installation 12 Step 3 Inspect Unit 12 Step 4 Provide Unit Support 12 Roof Curb Mount 12 Slab Mount Horizontal Units Only 15 Alternate Unit Support In Lieu of Curb or Slab Mount 15 Step 5 Field Fabricate Ductwork 15 Step 6 Rig and Place Unit 15 Positioning on Curb 16 Step 7 Horizontal Duct Connection 16 Step 8 Install Outside Air Hood Factory Option 16 Step 9 Install External Condensate...

Страница 2: ...inguisher 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 ...

Страница 3: ... Efficiency Motor Horizontal Supply Return Air Flow Refrig System Options D Two stage Cooling 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 Guards N Precoat Al Cu Al Cu Louvered Hail Guards P E coat Al Cu Al Cu Louvered Hail Guards Q E coat Al Cu E coat Al Cu Louver...

Страница 4: ...4 a548J 015 Fig 2 Unit Dimensional Drawing Size 17 Units ...

Страница 5: ...5 a548J 016 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...

Страница 6: ...6 a548J 017 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...

Страница 7: ...7 a548J 018 Fig 3 Unit Dimensional Drawing Size 24 Units ...

Страница 8: ...8 a548J 019 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...

Страница 9: ...9 a548J 020 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...

Страница 10: ... 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 5 on page 11 and Tables 1 3 Troubleshooting Refrigerant Pressure Problems and Check V...

Страница 11: ...lter 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 5 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 m...

Страница 12: ...te 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 thru base service connection fittings affects curb and unit ...

Страница 13: ...13 C10139 Fig 7 Roof Curb Details Size 17 Units ...

Страница 14: ...14 C10140 Fig 8 Roof Curb Details Size 24 Units ...

Страница 15: ...rk joints 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 For units with accessory electric heaters minimum clearance is not required ...

Страница 16: ...ontal duct connections Note that there are two different return air duct connection locations one for unit without an economizer on back side of unit and a different one for unit equipped with an economizer on left end under the economizer hood The supply air duct connection is on the back side See Fig 12 for top view depicting typical horizontal duct arrangements Field supplied 3 4 inch flanges s...

Страница 17: ...od see Fig 15 4 Secure side plates to panel using the screws provided 5 Apply seal strip to mating flange of the hood see Fig 15 6 Secure top flange using screws provided in kit 7 Install outdoor air screens by sliding them into the channel formed by the four angles installed in step 2 Make sure that the screens extend across the entire length of the hood 8 Install side filter supports using the s...

Страница 18: ...ed convenience outlet operation is desired connect the source leads to the line side of the unit mounted disconnect Check with local codes to ensure this method is acceptable in your area If a de energize via unit disconnect switch operation of the convenience outlet is desired connect the source leads to the load side of the unit disconnect On a unit without a unit mounted disconnect connect the ...

Страница 19: ...19 a50 9696 Fig 20 548J 17 24 Control Wiring Diagram with VFD Option ...

Страница 20: ...20 a50 9697 Fig 21 Typical 548J 17 24 Power Wiring Diagram 208 230V 3 Phase 60Hz unit shown ...

Страница 21: ...ust comply with NEC and all local code requirements Size wire based on MCA Minimum Circuit Amps on the unit informative plate See Fig 23 for power wiring connections to the unit power terminal block and equipment ground 11 12 13 L1 L2 L3 TB 208 230 3 60 460 3 60 575 3 60 Units Without Disconnect Option Units With Disconnect Option T1 T2 T3 L1 L2 L3 L1 L2 L3 Factory Wiring Disconnect per NEC Option...

Страница 22: ...ence Outlet Location A 20 amp non powered convenience outlet is available as a field installed accessory Non powered type This type requires the field installation of a general purpose 125 volt 15 A circuit powered from a source elsewhere in the building Observe national and local codes when selecting wire size fuse or breaker requirements and disconnect switch size and location Route 125 v power ...

Страница 23: ...three knock outs High voltage is brought through the multi knock out by removing the appropriate size for the size of the fitting required A 7 8 in knock out is provided for low voltage An additional 7 8 in knock out is provided for a 115 volt line which is used when the unit is equipped with the non powered convenience outlet option All required fittings are field supplied Install fittings when a...

Страница 24: ...n wiring terminal configuration Commercial Defrost Control The Commercial Defrost Control Board DFB coordinates thermostat demands for supply fan control 1 or 2 stage cooling 2 stage heating emergency heating and defrost control with unit operating sequences The DFB also provides an indoor fan off delay feature user selectable See Fig 28 for board arrangement DIP Switches Speed Up Jumpers C09275 F...

Страница 25: ...DFT1 DI 24Vac DFT 1 to DFT 1 DFT 2 DI 24Vac DFT 2 to DFT 2 Outputs Point Name Type of I O Connection Pin Number Unit Connection Note IFO Fan On DO 24Vac P3 9 REHEAT HP 2 OF OD Fan On DO 24Vac OF OFR RVS1 DO 24Vac P3 7 to P3 5 Energize in COOL RVS2 DO 24Vac P3 6 to P3 4 Energize in COOL COMP 1 DO 24Vac P3 10 FPT1 REHEAT HP 6 COMP 2 DO 24Vac P3 8 FPT2 REHEAT HP 8 HEAT 2 DO 24Vac E HEAT TB4 1 COM 24V...

Страница 26: ...t cycle limit is reached If the controlling DFT is open when this mode is initiated the Defrost cycle will run for 30 seconds Both modes end at the end of the Defrost cycle Unit Without Thru Base Connection Kit Correctly rated low voltage wire can be routed through the rubber grommet located on the corner post adjacent to the control box access panel Route wire through the grommet and then route t...

Страница 27: ...e list of approved heaters Control Box Access Panel Filter and Indoor Coil Access Panel Indoor Blower Access Panel Electric Heat Access Panel C10631 Fig 32 Typical Access Panel Location Indoor Blower Access Panel Heater Module Filter Area Main Control Box C10632 Fig 33 Typical Component Location Electric Heater Tracks Electric Heater Opening C09142 Fig 34 Electric Heater Compartment Cover Removed ...

Страница 28: ...ations 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 16 characte...

Страница 29: ...r 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 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...

Страница 30: ...le 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 39 for CO2 sensor wiring CO2 SENSOR 24V ANALOG OUT L1 HOT L2 RED BLACK YELLOW BROWN ORANGE GREEN POWER SUPPLY PROVIDE DISCONNECT...

Страница 31: ...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 ...

Страница 32: ...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...

Страница 33: ...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 ...

Страница 34: ...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...

Страница 35: ...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...

Страница 36: ...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 ...

Страница 37: ...stage 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 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 ...

Страница 38: ...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...

Страница 39: ...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...

Страница 40: ...l Open Closed to Full Open On On High DELAY 24 v On 0 v Off VENTMIN H to Full 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 satisf...

Страница 41: ...ions will happen S The Y2 In call will be satisfied with the damper 100 open and 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 instal...

Страница 42: ...ring the operation of the system as a test that the system is operable EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage 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 ...

Страница 43: ...n Controller Inputs and Outputs for locations of all connections to the RTU Open board C14049 Fig 42 548J Control Box Component Locations 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 ECON Gnd OAT Gnd SAT Input_5 SMK Input_4 R BO 5 Y1 ...

Страница 44: ...44 a50 9699 Fig 44 RTU Open System Control Wiring Diagram ...

Страница 45: ...J1 4 Binary Output 1 G Cool 1 Relay State comp_1 BO Relay 24VAC 1A J1 8 Binary Output 5 Y1 Cool 2 Relay State comp_2 BO Relay 24VAC 1A J1 7 Binary Output 4 Y2 Cool 3 Relay 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...

Страница 46: ...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 configurations associated with space sensors S 33ZCT55SPT space temperature sensor with override button T 55 S 33ZCT56SPT space temperature sensor with override button and setpoint adjustment T 56 S 33ZCT59SPT space temperature sensor wi...

Страница 47: ...te 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 influenced by...

Страница 48: ...connected to the unit s CTB input The FSD function is initiated via the smoke detector s Alarm NO contact set The RTU Open controller communicates the smoke detector s tripped status to the BAS building control See Fig 44 RTU Open System Control Wiring Diagram The Fire Shutdown Switch configuration MENU Config Inputs input 5 identifies the normally open status of this input when there is no fire a...

Страница 49: ...en installing this accessory the unit must be configured for remote occupancy by setting MENU Config Inputs input 3 5 8 or 9 to Remote Occupancy and normally open N O or normally closed N C Also set MENU Schedules occupancy source to DI on off Input 8 or 9 is recommended for easy of installation Refer to Fig 43 and Table 22 for wire terminations at J5 Power Exhaust output The relay used by the RTU...

Страница 50: ...h interface to the RTU Open controller J13 local access port There are 2 password protected levels in the display User and Admin See the Equipment Touch Installation and Setup Guide for more information See Appendix A in the guide for navigation and screen content Field Assistant Field Assistant is a computer program included with the purchase of the Tech Tool Kit USB TKIT This is a field Tech Too...

Страница 51: ...wo or more devices on this network have the same MSTP network address 2 flashes per second On Exec halted after frequent system errors or control programs halted 5 flashes per second On Exec start up aborted Boot is running 5 flashes per second Off Firmware transfer in progress Boot is running 7 flashes per second 7 flashes per second alternating with Run LED Ten second recovery period after brown...

Страница 52: ...n the enthalpy controller Smoke Detectors Smoke detectors are available as factory installed options on 548J units Smoke detectors may be specified for Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return Air The unit is factory configured for immediate smoke detector shutdown operation additional wiring or modifications to unit terminal board may...

Страница 53: ...ed OCCUPANCY on CTB Remove or cut jumper JMP 2 to complete the installation Step 12 Install Accessories Available accessories include Roof Curb Thru base connection kit must be installed before unit is set on curb Manual outside air damper Two Position motorized outside air damper EconoMi er IV with control and integrated barometric relief EconoMi er2 without control for external signal and integr...

Страница 54: ... 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 67 V Belt Force Label BLOWER PULLEY V BELT MOTOR PULLEY MOTOR MOTOR MOUNTING PLATE MOUNTING BOLTS 4 C11504 Fig 68 Belt Drive Motor Mounting Manufacturer reserves the right to discontinue or change at any time speci...

Страница 55: ...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...

Страница 56: ...GERANT 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 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations E2018 Bryant Heating Cooling Systems Edition Date 01 18 Printed in ...

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