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Bryant 548J 04-24 581J 04-28, Controls, Start-Up, Operation And Troubleshooting, Page: 24 / 44

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Bryant 548J 04-24 581J 04-28 Controls, Start-Up, Operation And Troubleshooting Download Page 24

24

Table 4 – RTU Open Alarms

POINT NAME

BACnet Object

NAME

ACTION TAKEN BY

CONTROL

RESET METHOD

PROBABLE CAUSE

Safety Chain

safety_alarm

Immediate Shutdown

Automatic

Over load Indoor Fan or Electric Heater

overheat

Fire Shutdown

fire_alarm

Immediate Shutdown

Automatic

Smoke detected by smoke detector or

configuration incorrect

Supply Fan Failure

sfan_fail_alarm

Immediately disable

Operation

Automatic

Tripped Circuit Breaker, Broken belt,

Bad indoor fan motor, Configuration

incorrect, Bad fan status switch.

Supply Fan in Hand

sfan_hand_alarm

Ramp down Operations

Automatic

Bad Fan Status Switch, Configuration

incorrect.

Compressor Safety

comp_alarm

Alert Generated

Automatic

Compressor would not start

Space Temp Sensor

spt_fail

Ramp down Operations

Automatic

Faulty, shorted, or open thermistor

caused by wiring error or loose

connection.

Supply Air Temp Sensor

sat_alarm

Economizer Disabled

Automatic

Faulty, shorted, or open thermistor

caused by wiring error or loose

connection.

Outdoor Air Temp Sensor

Alarm

oat_alarm

Economizer and Low ambient DX

cooling lockout disabled.

Automatic

Faulty, shorted, or open thermistor

caused by wiring error or loose

connection.

Space Relative

Humidity Sensor

sprh_alarm

Dehumidification disabled

Automatic

Sensor reading is out of range. Bad

sensor, bad wiring, or sensor configured

incorrectly.

IAQ Sensor

iaq_alarm

No IAQ Operation

Automatic

Sensor reading is out of range. Bad

sensor, bad wiring, or sensor configured

incorrectly.

OAQ Sensor

oaq_alarm

Set OAQ to 400

Automatic

Sensor reading is out of range. Bad

sensor, bad wiring, or sensor configured

incorrectly.

Space Temperature

spt_alrm_status

Alert Generated

Automatic

Space value is less then the low

allowed value or Space value is greater

then the high allowed value

Alarming

Temperature

spt_alrm_temp

Shows temperature that caused

alarm

N/A

N/A

Alarm Limit

Exceeded

spt_alrm_lmt

Shows the limit that was

exceeded

N/A

N/A

High Supply Air

Temperature

sat_hi_alarm

Alert Generated

Automatic

SAT is greater then the configuration for

more then 5 minutes

Low Supply Air

Temperature

sat_lo_alarm

Alert Generated

Automatic

SAT is less then the configuration for

more then 5 minutes

Setpoint Slider

slidepot_alarm

Set Offset to zero

Automatic

STO sensor is open for more then 5

seconds

Switch Configuration

di_cfg_alarm

Disable only wrong switch

functions

Configure correctly

More then one discrete input is

configured to provide the same

function.

Analog Input

Configuration

ai_cfg_alarm

Disable 4 selectable analog inputs

Configure correctly

More then one analog input is

configured to provide the same

function.

High Space Relative

Humidity

sprh_hi_alarm

Alert Generated

Automatic

IRH is greater then the configuration for

more then 15 minutes

Low Space Relative

Humidity

sprh_lo_alarm

Alert Generated

Automatic

IRH is less then the configuration for

more then 5 minutes

High CO2

co2_alarm

Alert Generated

Automatic

CO2 reading is above the configuration

for 1 minute

Supply Fan Runtime

sfan_rntm_alarm

Alert Generated

zero the timer

Supply fan run time exceeded user

defined limit

Compressor 1 Runtime

comp1_rntm_alarm

Alert Generated

zero the timer

Compressor run time limit is exceeded

Compressor 2 Runtime

comp2_rntm_alarm

Alert Generated

zero the timer

Compressor run time limit is exceeded

Filter

filter_alarm

Alert Generated

Automatic / reset

timer

Dirty Filter, supply fan run time

exceeded, filter switch configuration

wrong.

TS

-

5580

-

01

Summary of Contents for 548J 04-24 581J 04-28

Page 1: ...ation Inspection 13 Perfect Humidityt Control Wiring 13 Power Exhaust Relay Power 13 Service Test 13 Fan Test 13 High Speed Fan Test 13 Compressor 1 and Compressor 2 Test 13 Heat 1 and Heat 2 Test 13 Reversing Valve Test 13 Dehumidification Test 14 Power Exhaust Test 14 Economizer Test 14 Analog Output 2 Test 14 Configuration 14 Setpoint 14 Unit 14 Inputs 15 Service 16 Clockset 17 USERPW 17 OPERAT...

Page 2: ...e RTU Open controller is an integrated component of the Bryant rooftop unit Its internal application programming provides optimum performance and energy efficiency RTU Open enables the unit to run in 100 stand alone control mode or a Third Party Building Automation System BAS On board DIP switches allow you to select your protocol and baud rate of choice among the four most popular protocols in us...

Page 3: ... Y2 DO 3 W1 DO 2 W2 DO 1 G Gnd Input_3 X 24 VAC IN 24 VDC Input_2 CO2 RH Gnd 24 VDC Input_1 CO2 RH Gnd Board Power AO 1 0 10VDC 4 20mA DO 6 H Dehumidification DO 7 Reversing Valve High Speed Fan DO 8 Power Exhaust Lonworks Option Card Port Example set for BACnet MS TP and 76 8K baud 1 2 and 4 ON Protocol Selector SPT temp input BACnet Modbus or N2 LON connection J15 SPT common SPT offset input Rem...

Page 4: ...perature sensor 33ZCSENSAT is factory installed S Space temperature sensor 33ZCT55SPT 33ZCT56SPT or 33ZCT59SPT S Indoor air quality sensor 33ZCSPTCO2 01 33ZCSPTCO2LCD 01 33ZCT55CO2 33ZCT56CO2 required for demand control ventilation S Outdoor air quality sensor 33ZCSPTCO2 01 33ZCSPTCO2LCD 01 S CO2 aspirator box C33ZCCASPCO2 required for CO2 return duct outside air applications S Outdoor air enthalp...

Page 5: ...5 C12745 Fig 2 Typical Factory Option Wiring TS 5580 01 ...

Page 6: ...the BACview6 installation instructions for for details on addressing For Rnet wiring up to 500ft 152m use 18 AWG 4 conductor unshielded plenum rated cable The RTU Open s J13 RNET connection has a 4 pin Phoenix connector wired as described below Fig 6 shows sensor Rnet wiring S RNET 1 Signal ground GND S RNET 2 Signal Rnet S RNET 3 Signal Rnet S RNET 4 Power 12v CO2 Sensor s IAQ and OAQ The indoor ...

Page 7: ...ICATION SPACE TEMPERATURE AVERAGING 9 SENSOR APPLICATION LEGEND Factory Wiring Field Wiring 1 2 C07133 Fig 5 Space Temperature Averaging C10820 Fig 6 Typical Rnet Communication Sensor Wiring To controller 24 Vac Line Dedicated Transformer 24 Vac or Vdc 8 7 6 5 4 2 1 SENSOR LEGEND 1 24 Vac Vdc 2 Gnd 24 Vac Vdc 4 Thermistor 5 Thermistor 6 4 20 mA 7 SIG COM 8 0 5 Vdc C12748 Fig 7 Indoor Outdoor Air Q...

Page 8: ...default control for the Perfect Humidityt option To wire in the field S J5 8 24 VAC source for dry contact S J5 7 Signal input Single Enthalpy Outdoor Enthalpy The outdoor enthalpy switch receiver 33CSENTHSW senses temperature and humidity of the air surrounding the device and calculates the enthalpy when used without an enthalpy sensor The relay is energized when enthalpy is high above 28 BTU lb ...

Page 9: ...NIT SHUTDOWN Smoke Alarm Signal input to RTU Open NOTE Input 5 can also be wired into J5 3 Filter Status The filter status accessory is a field installed accessory This accessory detects plugged filters When installing this accessory the unit must have a free input input 3 5 8 or 9 One of the dedicated functions Humidistat Fire shutdown Enthalpy or Compressor safety must not be in use to configure...

Page 10: ...rks Switch 3 SW3 on the board is used to set protocol and baud rate Switches 1 and 2 SW1 and SW2 are used to set the board s network address See Fig 11 and 12 for protocol switch settings and address switches The 3rd party connection to the RTU Open is through plug J19 See Fig 13 for wiring Contact Bryant applications engineering for more detailed information on protocols 3rd party wiring and netw...

Page 11: ...The speed of a Modbus network can range from 9600 to 76 8K baud Physical Addresses can be set from 01 to 99 Johnson N2 N2 is not a standard protocol but one that was created by Johnson Controls Inc that has been made open and available to the public The speed of N2 network is limited to only 9600 baud Physical Addresses can be set from 01 to 99 LonWorks LonWorks is an open protocol that requires t...

Page 12: ...ere is a 10 minute auto logout if a screen is left idle See Appendix A for navigation and screen content Virtual BACview Virtual BACview is a freeware computer program that functions as the BACview6 Handheld The USB Link interface USB L is required to connect a computer to the RTU Open board The link cable connects a USB port to the J12 local access port This program functions and operates identic...

Page 13: ...s indoor fan power exhaust fans economizer and dehumidification Use of Service Test is recommended at initial system start up and during troubleshooting See Appendix A for Service Test Mode table Service Test mode has the following changes from normal operation S Outdoor air temperature limits for cooling circuits economizer and heating are ignored S Normal compressor time guards and other staging...

Page 14: ... unoccupied period Range 45 99_F Default 90_F Effective Heating Setpoint The current setpoint value heating operation will control to Range 0 120_F Effective Cooling Setpoint The current setpoint value cooling operation will control to Range 0 120_F Optimal Start The earliest time prior to occupancy at which the Optimal Start function may begin to adjust the effective setpoints Setting this to 0 w...

Page 15: ...ut Temperature This defines the minimum outdoor air temperature that cooling mode can be enabled and run If the OAT falls below this number during cooling the compressors will be de energized Range 0 80_F Default 45_F Economizer High OAT Lockout Temp If the outdoor air temperature rises above this value economizer cooling will be disabled and dampers will return and stay at minimum position Range ...

Page 16: ...ng ONLY is desired Factory Default One Stage for 1 compressor units or Two Stages for 2 compressor units Economizer Exists This tells the controller if there is an economizer installed on the unit Factory Default NO if no economizer or YES if there is an economizer installed Reversing Valve Output Sets the heat pump s HP O B Ctrl type reversing valve function O output type refers to a valve that i...

Page 17: ...pancy Source is set to BAS On Off RTU Open follows occupancy based on an On Off command to the BAS ON OFF software point An on command sets the occupancy to occupied and an off command sets it to unoccupied The Building Automation System can be speaking BACnet Modbus N2 or LON and is writing to the BAS On Off point in the open protocol point map Remote Occ Input When Occupancy Source is set to Rem...

Page 18: ...he fan runs continuously regardless of occupancy or calls for heating and cooling Occupancy can be determined by BACnet schedules BAS schedules or in response to a remote occupancy switch A Fan Off Delay allows the supply fan to continue operating after heating or cooling stops If the following alarms are active the fan turns off immediately regardless of the occupancy state or demand S Fire Shutd...

Page 19: ...ergize heat outputs to satisfy the heat demand If the SAT begins to exceed the high supply air setpoint a ramping function will cause the Heat Stages Capacity algorithm to decrease the number of stages until the SAT has dropped below the setpoint There is a fixed one minute minimum on time and a one minute off time for each heat output Heat staging has a 2 minute stage up and 30 second stage down ...

Page 20: ... The Optimal Start recovery period may begin as early as 4 hours prior to occupancy The algorithm works by moving the unoccupied setpoints toward the occupied setpoints The rate at which the setpoints move is based on the outside air temperature design temperatures and capacities The following conditions must be true for unoccupied free cooling to operate S Under SETPOINT Optimal Start Value must ...

Page 21: ...ccuracy use a high quality digital volt ohmmeter Connect the meter to the thermistor leads to obtain a resistance value Use Table 2 to convert that resistance to a temperature Next step is to measure temperature at probe location with an accurate thermocouple type temperature measuring instrument Temperature measured by thermocouple and temperature determined from thermistor voltage reading should...

Page 22: ...22 C10825 Fig 16 Example Modstat TS 5580 01 ...

Page 23: ...al 2 flashes per second 2 flashes alternating with Run LED Five minute auto restart delay after system error 2 flashes per second 3 flashes then off Control module has just been formatted 2 flashes per second 4 flashes then pause Two 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 pro grams halted 5 flas...

Page 24: ...t_alrm_status Alert Generated Automatic Space value is less then the low allowed value or Space value is greater then the high allowed value Alarming Temperature spt_alrm_temp Shows temperature that caused alarm N A N A Alarm Limit Exceeded spt_alrm_lmt Shows the limit that was exceeded N A N A High Supply Air Temperature sat_hi_alarm Alert Generated Automatic SAT is greater then the configuration...

Page 25: ... by Aux Heat Stage 2 The compressor output stays on when the safety alarm is present For cooling the alarm indicates the compressors are down Space Temp Sensor This alarm occurs if the space sensor wired to the RTU Open is disconnected or shorted for more than 10 seconds When this occurs the Unit Status will be Shutdown and the System Mode will be Run Sensor sensor connections wiring board connect...

Page 26: ...ates the space humidity falls below the alarm configuration Low Space Humidity Alarm Limit for 5 minutes This alarm is inhibited until the RTU runs for 5 minutes to allow for system stabilization after startup High CO2 This alarm indicates the space CO2 level exceeds the alarm configuration Occupied High CO2 Alarm Limit for 1 minute This alarm will be inhibited until the RTU has been running for 2...

Page 27: ...are used as an identifier YM These two digits identify the last digit of the year and month in hex A 10 Oct of manufacture 74 would represent a date of manufacture of April 2007 xxxx These four digits represent the sequential number of units produced for a given product for the mentioned manufacturing time period N This final digit represents the decade and toggles between N and M every ten years ...

Page 28: ...2770 BACview Navigation NOTE The Tables in Appendix A describe parameters of each of the menu levels shown below STANDBY HOME SYSTEM ALARM MAINT STATUS CONFIG SETTINGS Login BACnet Keypad UserPw Network ClockSet DST TimeMstr Clockset UNIT SETPOINT Sched ALARMS Weekly schedule Exceptions SETPOINT CALIBRATE INPUT SETPOINT Sched SERVICE TEST Alarm C12771 Modstat screen only reached by FN TS 5580 01 ...

Page 29: ...et BACnet Device Instance xxxxxxx 1610100 Base BACnet Device ID xxxxxxx 1610100 Autogenerate Device ID Y N Y Keypad Keypad Configuration Inactivity Timeout 1 255 minutes 10 BACnet Write Priority 0 16 0 UserPw View Set User Password 0000 NETWORK NETWORK Max Masters this_device 64 1 127 127 Max Info Frames this_device 63 1 999 10 APDU Timeout ms this_device 11 1 10000 3000 APDU Retries this_device 7...

Page 30: ...est 8 Shutdown 9 Unocc Free Cooling NTFC 10 Fire Shutdown 11 IAQ Override 12 Pre occ Purge Supply Fan Status sfan_status Off Running Fan Speed fan_run 1 Off 2 Low 3 Med 4 High 5 On Supply Fan VFD vfd_output 0 100 Space Temperature Prime Variable space_temp xxx F Supply Air Temperature sa_temp xxx F Outdoor Air Temperature oa_temp xxx F Space Relative Humidity space_rh 0 100 Indoor Air CO2 iaq 0 50...

Page 31: ...imer sfan_service_hrs 0 9999 hr 600 Comp 1 Service Alarm Timer comp1_service_hrs 0 9999 hr 0 Comp 2 Service Alarm Timer comp2_service_hrs 0 9999 hr 0 Filter Service Alarm Timer filter_service_hrs 0 9999 hr 600 Pushbutton Override pb_enable Disable Enable Enable Setpoint Adjustment stpt_adj_enable Disable Enable Enable Setpoint Adjustment Range stpt_adj_range 0 5 F 5 Cooling Lockout Temperature oat...

Page 32: ...t 5 Switch Configuration di5_type N O N C N C Input 8 Function di8_function 1 No Function 2 Enthalpy Switch 3 Fan Status 4 Filter Status 5 Remote Occupancy 6 Door Contact 1 No FIOP 2 FIOP Input 8 Switch Configuration di8_type N O N C N O Input 9 Function di9_function 1 No Function 2 Humidistat 3 Fan Status 4 Filter Status 5 Remote Occupancy 6 Door Contact Humidistat Input 9 Switch Configuration di...

Page 33: ...ust Setpoint pexh_stpt 20 90 Open 50 Occ Relative Humidity Setpoint occ_dehum_stpt 0 unocc setpoint rh 60 Unocc Relative Humidity Setpoint unocc_dehum_stpt 30 100 rh 95 HOME CONFIG Sched Schedule BACview only Weekly schedule MON SUN none Exceptions none ALARM CONFIGURATION HOME CONFIG ALARMS SPACE TEMPERATURE ALARM Properties Equipment Configuration Alarm Configuration Occupied Alarm Hysteresis oc...

Page 34: ...r Air Temp Sensor oat_alarm Normal Alarm Space Relative Humidity sprh_hi_alarm Normal Alarm Space Relative Humidity Sensor sprh_sensor_fail Normal Alarm Indoor Air Quality Sensor iaq_sensor_alarm Normal Alarm Outdoor Air Quality Sensor oaq_fail Normal Alarm Space Temperature spt_alrm_status Normal Alarm Alarming Temperature spt_alrm_temp xxx F Alarm Limit Exceeded spt_alrm_lmt xxx F Setpoint Slide...

Page 35: ... 580 558J04 and 08 09 med 580 558J05 09 high heat 3 phase gas units 581 551J04 09 3 phase gas units and All 12 30 gas units Continuous Occupied Exhaust occ_exh No Yes No RH Control rh_enable Disable Enable Disable Enable units with Perfect Humidity option DCV Control dcv_enable Disable Enable Disable Indoor CO2 Sensor Value Min mA iaq_ref_lo_ppm 0 9999ppm 0 Indoor CO2 Sensor Value Max mA iaq_ref_h...

Page 36: ...s Run Enabled Shutdown Compressor Safety Status comp_status Normal Trouble Calculated Min Econ Pos cal_min_econ_pos 0 100 Calculated Min PE Pos cal_pe_stpt 0 100 Active Compressor Stages comp_run 0 2 Active Heat Stages heat_run 0 2 Enthalpy Status enthalpy_status High Low Humidistat Input Status humstat_status High Low Filter Status filter_status Clean Dirty Door Contact Status door_contact_status...

Page 37: ...ckout AV 9008 Economizer Output R econ_output AV 2022 float value 40051 ADF 20 SNVT_lev_percent 81 nvoEconOutput Economizer Purge Min Pos R W econ_purge_min AV 9029 float value 40075 ADF 5 SNVT_lev_percent 81 nviEconPurgeMin Economizer Test R W econ_test AV 81001 float value 40053 ADF 21 SNVT_temp_p 105 Effective Cool Setpoint R eff_cl_stpt AV 3005 float value 40055 ADF 22 SNVT_temp_p 105 nvoEffCo...

Page 38: ..._switch 95 nvoLoSpaceTemp Maximum Heating SAT R W sat_ht_max AV 83004 Minimum Cooling SAT R W sat_cl_min AV 83003 Number Of Heat Stages R W heat_stages MSV 91004 Occ Relative Humidity Setpoint R W occ_dehum_stpt AV 3011 float value 40083 ADF 36 SNVT_lev_percent 81 nviOccRHSP Occupancy Contact R occ_contact_status BV 1007 Occupancy Source R W occ_source MSV 1002 Occupancy Status R occ_status BV 200...

Page 39: ...e Prime Variable R space_temp AV 2007 float value 40107 ADF 48 SNVT_temp_p 105 nvoSpaceTemp Space Temperature Offset Pot R stpt_adj_offset AV 91006 SPT Sensor R spt_sensor_fail BV 7032 discrete in 10038 BI 38 Supply Air Temperature R sa_temp AV 1008 float value 40109 ADF 49 SNVT_temp_p 105 nvoSAT Supply Air Temperature R sat_alarm BV 7004 discrete in 10047 BI 47 SNVT_switch 95 nvoSATSensor Supply ...

Page 40: ...stems D 7310 W Morris St D Indianapolis IN 46231 Edition Date 11 12 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No TS 5580J 01 Replaces New TS 5580 01 ...

Page 41: ... Max Ctrl Setpoint iaq_stpt_max 0 9999 ppm 650 Power Exhaust Setpoint pexh_stpt 20 90 Open 50 Occ Relative Humidity Setpoint occ_dehum_stpt 0 unocc setpoint rh 60 Unocc Relative Humidity Setpoint unocc_dehum_stpt 30 100 rh 95 HOME CONFIG Sched Schedule Weekly schedule MON SUN none Exceptions none ALARM CONFIGURATION HOME CONFIG ALARMS SPACE TEMPERATURE ALARM Occupied Alarm Hysteresis occ_spt_alrm_...

Page 42: ... Alarm Timer comp1_service_hrs 0 9999 hr 0 Comp 2 Service Alarm Timer comp2_service_hrs 0 9999 hr 0 Filter Service Alarm Timer filter_service_hrs 0 9999 hr 600 Pushbutton Override pb_enable Disable Enable Enable Setpoint Adjustment stpt_adj_enable Disable Enable Enable Setpoint Adjustment Range stpt_adj_range 0 5 F 5 Cooling Lockout Temperature oat_cl_lockout 0 80 F 45 Economizer High OAT Lockout ...

Page 43: ...i5_type N O N C N C Input 8 Function di8_function 1 No Function 2 Enthalpy Switch 3 Fan Status 4 Filter Status 5 Remote Occupancy 6 Door Contact 1 No FIOP 2 FIOP Input 8 Switch Configuration di8_type N O N C N O Input 9 Function di9_function 1 No Function 2 Humidistat 3 Fan Status 4 Filter Status 5 Remote Occupancy 6 Door Contact Humidistat Input 9 Switch Configuration di9_type N O N C N O Space s...

Page 44: ...ontrol rh_enable Disable Enable Disable Enable units with Perfect Humidity option DCV Control dcv_enable Disable Enable Disable Indoor CO2 Sensor Value Min mA iaq_ref_lo_ppm 0 9999ppm 0 Indoor CO2 Sensor Value Max mA iaq_ref_hi_ppm 0 9999ppm 2000 Outdoor CO2 Sensor Value Min mA oaq_ref_lo_ppm 0 9999ppm 0 Outdoor CO2 Sensor Value Max mA oaq_ref_hi_ppm 0 9999ppm 2000 Field Assistant Only System Spac...

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