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48/50TC04---28, 50TCQ04---12
48/50HC04---14, 50HCQ04---12
Factory Installed Option
RTU---OPEN
TABLE OF CONTENTS
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Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Controls, Start---Up, Operation
and Troubleshooting Instructions
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Printed in U.S.A.
Edition Date: 08/10
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Catalog No:48---50HCTQ---01T
Replaces: NEW
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Table of Contents
Related Manuals for Carrier 48/50HC04---14
Summary of Contents for Carrier 48/50HC04---14
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Page 1: Table Of Contents
......Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. -
Page 2: Safety Considerations
RTU- - OPEN enables the unit to run in 100% stand- - alone control mode, Carrier’s I- - Vu Open network, or a Third Party Building Automation System (BAS). On- - board DIP switches allow you to select your protocol... - Page 3 C10818 Fig. 1 - - RTU- -OPEN Control Module...
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Page 4: Sensors And Accessories
Space Temperature Sensor (SPT) There are 2 types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. - Page 5 C10819 Fig. 2 - - Typical Factory Option Wiring...
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Page 6: Co 2 Sensor(S) (Iaq And Oaq)
For sensor with setpoint adjustment up to 500 ft (152m), use three-conductor shielded cable 20 gauge wire to connect the sensor to the controller. For non set point adjustment (slidebar) or return air duct sensor, an unshielded, 18 or 20 gauge, two-conductor, twisted pair cable may be used. - Page 7 SENSOR 1 SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION LEGEND Factory Wiring Field Wiring SPACE TEMPERATURE AVERAGING — 9 SENSOR APPLICATION Fig. 6 - - Typical Rnet Communication Sensor Wiring SENSOR 2 SENSOR 1 SENSOR 2 SENSOR 4 SENSOR 5 SENSOR 8 SENSOR 7 Fig.
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Page 8: Relative Humidity Sensors
Mounted) The accessory space humidity sensor or duct humidity sensor is used to measure the relative humidity of the air within the space or return air duct. The RH reading is used to control the Humidi-Mizert option of the rooftop unit. For wiring distances up to 500 ft (152m), use a 3-conductor, 18 or 20 AWG shielded cable. -
Page 9: Fire Shutdown
J4-1 or J4-4 + 24 VDC Supply Voltage J4-2 or J4-5 (-) 4 to 20 mA Current Loop Output to RTU-OPEN Fig. 9 - - Duct Relative Humidity Sensor Typical Wiring To wire return air enthalpy sensor:--MP Connect the 4-20 mA In terminal on the enthalpy switch/ receiver to the 4-20 mA Out terminal on the return air enthalpy sensor. -
Page 10: Communication Wiring- -Protocols
BACnet MS/TP BACnet Master Slave/Token Passing (MS/TP) is used for communicating BACnet- - only controllers. This is the default Carrier communications protocol. Each RTU- - OPEN module acts as an MS/TP Master. The speed of an MS/TP network can range from 9600 to 76.8K baud. Physical Addresses can be set from 01 to 99. -
Page 11: Modbus
PROTOCOL BACnet MS/TP Unused (Master) Modbus Unused (Slave) Unused (Slave) LonWorks Unused NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown Baud Rate Selections BAUD RATE 9600 19,200 38,400 76,800 Fig. 12 - - RTU- -OPEN Address Switches Fig. 13 - - Network Wiring Fig. -
Page 12: Local Access
Local Access BACview Handheld The BACview is a keypad/display interface used to connect to the RTU- - OPEN to access the control information, read sensor values, and test the RTU. (See Fig. 15.) This is an accessory interface that does not come with the RTU- - OPEN controller. -
Page 13: Start- -Up
START- -UP IMPORTANT: Follow the base unit’s start-up sequence documented in its specific instructions. unit’s start-up check list when performing the start-up. At the end of this manual there is an additional RTU-OPEN Start-up Sheet to be completed and included with the base unit check list. -
Page 14: Dehumidification Test
units with factory Reheat dehumidification relay is used to change the output status to operate the circuits in different Reheat modes. Dehumidification relay on by itself puts all circuits running in Hot Gas Reheat dehumidification mode; dehumidification relay (compressor test relays) on puts unit and or individual circuits in subcooling dehumidification mode. -
Page 15: Inputs
position for ventilation during the occupied period Range = 95-150_F Default = 120_F DCV Max Vent Damper Pos – This is the greatest position the economizer can open to while trying to control the indoor air quality levels Range = 10-60%open Default = 50%open S Fan Service Alarm Timer –... -
Page 16: Service
configured to be one of six different functions: No Function, Fire Shutdown, Fan Status, Filter Status, Remote Occupancy, or Door Contact. This input can also be configured to be either a Normally Open (N/O) or a Normally Closed (N/C) switch. Input 5 is factory wired to pin J1-10. -
Page 17: Userpw
This submenu screen allows you to change the user password to a four number password of choice. The User password change screen is only accessible with the Administrator Password (1111). The ADMIN password will always override the user password. Factory Default = 0000 Range = 0000- - 9999 OPERATION The RTU-OPEN will control the compressors, economizer... -
Page 18: Cooling
The compressor outputs are controlled by the Cooling Control PID Loop and Cooling Stages Capacity algorithm. They will be used to calculate the desired number of stages needed to satisfy the space by comparing the Space Temperature (SPT) to the Occupied Cool Setpoint plus the T56 slider offset when occupied and the Unoccupied Cool Setpoint (UCSP) plus the T56 slider offset, if unoccupied. -
Page 19: Indoor Air Quality
PID logic loop to energize or de- - energize 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. -
Page 20: Optimal Start
Compressor Safety may be configured on Binary Input 3. A compressor safety tripped indicator circuit is available on most Carrier rooftop equipment. A Compressor Safety Alarm indicates that the equipment requires attention. Cooling, heating, and supply fan outputs are not interrupted except where the RTU- - OPEN is configured for Heat Pump operation. -
Page 21: Troubleshooting
TROUBLESHOOTING General The RTU- - OPEN controller acts as an intelligent imbedded thermostat to the rooftop unit, but can be monitored and controlled from I- - Vu Open (Linkage) or a 3rd party network. This causes the system as a whole to be troubleshot from three points of view. -
Page 22: Communication Led's
Communication LED’s The LED’s indicate if the controller is speaking to the devices on the network. The LED’s should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LED’s will appear. The LED’s on the RTU- - OPEN show the status of certain functions If this LED is on... - Page 23 BACnet Object POINT NAME NAME Safety Chain safety_alarm Fire Shutdown fire_alarm Supply Fan Failure sfan_fail_alarm Supply Fan in Hand sfan_hand_alarm Compressor Safety comp_alarm Space Temp Sensor spt_fail Supply Air Temp sat_alarm Sensor Outdoor Air Temp oat_alarm Sensor Alarm Space Relative sprh_alarm Humidity Sensor IAQ Sensor...
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Page 24: Alarms
Alarms are provided to indicate a possible problem with the controller or unit. Alarms can be checked through a network and/or the local access device. All alarms are listed in Table 4 with name, object name, action taken by control, reset method, and possible cause. Some alarms can occur based on specific configurations. - Page 25 alarm: Alarming Temperature – This variable displays the value of the space temperature that is in alarm and is only visible when the space temperature is in an alarm state. Alarm Limit Exceeded – This variable displays the value of the alarm setpoint that is exceeded by the alarming space temperature and is only visible when the space temperature is in an alarm state.
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Page 26: Third Party Networking
This alarm indicates that RTU-OPEN was connected to a zoned system called Linkaget communications with its linkage master or if it receives invalid data. When troubleshooting, you may need to know a control module’s manufacture date. Obtain the manufacture date from a... -
Page 27: Appendix A - - User Interface Menus
APPENDIX A - - USER INTERFACE MENUS Properties Equipment STANDBY HOME SYSTEM STATUS SETTINGS BACnet LINKAGE SETPOINT Login Keypad UserPw Network ClockSet TimeMstr Clockset Modstat screen only reached by (FN + .) Field Assistant Navigation Status Configuration Unit Configuration Setpoints Alarm Configuration Service Configuration Maintenance... - Page 28 APPENDIX A - - USER INTERFACE MENUS (CON’T) Standby BACview Screen and Login Screen BACview MENU STANDBY Operating Mode Space Temperature HOME LOGIN/LOGOUT Admin or User Password BACview MENU POINT NAME HOME SYSTEM SETTINGS BACnet Device Instance: BACnet Base BACnet Device ID: Autogenerate Device ID? Keypad Inactivity Timeout:...
- Page 29 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME STATUS System Mode Operating Mode Supply Fan Status Space Temperature --- Prime Vari- able Supply Air Temperature Outdoor Air Temperature Space Relative Humidity Indoor Air CO2 Outdoor Air CO2 Economizer Output LINKAGE Airside Linkage Status...
- Page 30 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME CONFIG SETPOINT Occupied Heating Setpoint Occupied Cooling Setpoint Unoccupied Heating Setpoint Unoccupied Cooling Setpoint Effective Cool Setpoint Effective Heat Setpoint Optimal Start Occ Relative Humidity Setpoint Unocc Relative Humidity Set- point DCV Max Ctrl Setpoint Power Exhaust Setpoint...
- Page 31 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME UNIT Fan Mode Unit Start Delay Fan Off Delay Minimum Cooling SAT Maximum Heating SAT Vent Dmpr Pos / DCV Min Pos DCV Max Vent Damper Pos S Fan Service Alarm Timer Comp 1 Service Alarm Timer Comp 2 Service Alarm Timer...
- Page 32 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME INPUT Input 1 Function Input 2 Function Input 3 Function Input 3 Switch Configuration Input 5 Function Input 5 Switch Configuration Input 8 Function Input 8 Switch Configuration Input 9 Function Input 9 Switch Configuration Space sensor type...
- Page 33 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME SERVICE Unit Type Compressor Stages Economizer Exists Reversing Valve Type Heat Type Number of Heat Stages Continuous Occupied Exhaust Indoor CO2 Sensor Value @ Min mA Indoor CO2 Sensor Value @ Max mA Outdoor CO2 Sensor Value @ Min mA...
- Page 34 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME MAINT Occupancy Status Space Temp Sensor Setpoint Adjustment System Cooling Demand Level System Heating Demand Level Safety Chain Feedback Fire Shutdown Status Compressor Safety Status Active Compressor Stages Active Heat Stages Enthalpy Status Humidistat Input Status...
- Page 35 APPENDIX A - - USER INTERFACE MENUS (CON’T) BACview MENU POINT NAME HOME ALARM Safety Chain Fire Shutdown Supply Fan Failure Supply Fan in Hand Compressor Safety Space Temp Sensor Supply Air Temp Sensor Outdoor Air Temp Sensor Alarm Space Relative Humidity Sensor IAQ Sensor OAQ Sensor Space Temperature...
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Page 36: Appendix B - - Third Party Points List
APPENDIX B - - THIRD PARTY POINTS LIST (IN ALPHABETICAL ORDER) BACnet Read/ BACnet Point Point Name Write Name Active Compressor Stages comp_run Active Heat Stages heat_run Airside Linkage air_link- Alarm age_fail Analog Input Config- uration ai_cfg_alarm BAS On / Off keypad_ovrde Compressor 1 Relay State... - Page 37 APPENDIX B - - THIRD PARTY POINTS LIST (CON’T) (IN ALPHABETICAL ORDER) BACnet Read/ BACnet Point Point Name Write Name Factory Test Relay 1 Control lay1_fac_test Factory Test Relay 2 Control lay2_fac_test Factory Test Relay 3 Control lay3_fac_test Factory Test Relay 4 Control lay4_fac_test Factory Test Relay 5...
- Page 38 APPENDIX B - - THIRD PARTY POINTS LIST (CON’T) (IN ALPHABETICAL ORDER) BACnet Read/ BACnet Point Point Name Write Name Input 1 Function ai1_function Input 2 Function ai2_function Input 3 Function di3_function Input 3 Switch Con- figuration di3_type Input 5 Function di5_function Input 5 Switch Con- figuration...
- Page 39 APPENDIX B - - THIRD PARTY POINTS LIST (CON’T) (IN ALPHABETICAL ORDER) BACnet Read/ BACnet Point Point Name Write Name Override Time Re- maining ovrde_time Password Protected Output Variable Power Exhaust Relay State pexh Power Exhaust Set- point pexh_stpt Power Exhaust Test pexh_test Pushbutton Override pb_status...
- Page 40 APPENDIX B - - THIRD PARTY POINTS LIST (CON’T) (IN ALPHABETICAL ORDER) BACnet Read/ BACnet Point Point Name Write Name Supply Air Temp Sensor sat_alarm Supply Air Temperat- sa_temp sfan_fail_alar Supply Fan Failure sfan_hand_ala Supply Fan in Hand Supply Fan Relay State sfan Supply Fan Runtime...
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Page 41: Rtu- -Open Start- -Up Sheet
RTU- -OPEN START- -UP SHEET RTU Model Number: RTU Serial Number: RTU--- OPEN Software Version: Protocol and Boad Rate: BACview POINT NAME MENU HOME CONFIG SET- POINT Occupied Heating Setpoint Occupied Cooling Setpoint Unoccupied Heating Setpoint Unoccupied Cooling Setpoint Effective Cool Setpoint Effective Heat Setpoint Optimal Start Occ Relative Humidity Setpoint... - Page 42 CONFIGURATION POINTS (CON’T) BACview POINT NAME MENU HOME CONFIG UNIT Fan Mode Unit Start Delay Fan Off Delay Minimum Cooling SAT Maximum Heating SAT Vent Dmpr Pos / DCV Min Pos DCV Max Vent Damper Pos S Fan Service Alarm Timer Comp 1 Service Alarm Timer Comp 2 Service Alarm Timer Filter Service Alarm Timer...
- Page 43 CONFIGURATION POINTS (CON’T) BACview POINT NAME MENU HOME CONFIG INPUT Input 1 Function Input 2 Function Input 3 Function Input 3 Switch Configuration Input 5 Function Input 5 Switch Configuration Input 8 Function Input 8 Switch Configuration Input 9 Function Input 9 Switch Configuration Space sensor type T5x Override Duration...
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Page 44: Edition Date: 08/10
Outdoor CO2 Sensor Value @ Min Outdoor CO2 Sensor Value @ Max Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.