Carrier RTU Open v3 Installation And Startup Manual Download Page 38

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Installing the RTU Open

RTU Open v3

Installation and Start-up Guide

Wiring a Humidistat

Locally Purchased
A humdistat may be used for zone humidity control (dehumidification) when applied to a Carrier rooftop unit

equipped with the Humidi-MiZer™ option. On units not equipped for dehumidification, the humidistat will indicate

a high humidity condition only.

NOTE

The humidistat is NOT an option for LC WeatherExpert™ units with gas heat. You must use the RH sensor

for humidity control.

Wiring specifications

Cable from sensor to controller:

If <100 ft (30.5 meters) 22 AWG, unshielded

If >100 ft (30.5 meters) 22 AWG, shielded

Maximum length:

500 feet (152 meters)

To wire a humidistat to the controller

Strip the outer jacket from the cable for at least 4 inches (10.2 cm). Strip .25 inch (.6 cm) of insulation from

each wire

Wire the humidistat to the controller. See diagram below.

Apply power and verify sensor readings.

NOTE

Humidistat may be return duct or space mounted.

Summary of Contents for RTU Open v3

Page 1: ...v v3 3 I In ns st ta al ll la at ti io on n a an nd d S St ta ar rt t u up p G Gu ui id de e CARRIER CORPORATION 2019 A member of the United Technologies Corporation family Stock symbol UTX Catalog No 11 808 499 01 12 3 2019 ...

Page 2: ...our local Carrier office Important changes are listed in Document revision history at the end of this document CARRIER CORPORATION 2019 All rights reserved throughout the world i Vu is a registered trademark of Carrier Corporation All other trademarks are the property of their respective owners ...

Page 3: ...ire inputs and outputs 16 Wiring sensors and switches to the controller 20 Field supplied sensor hardware 21 Wiring devices to the RTU Open s Rnet port 22 Wiring a Supply Air Temperature sensor 27 Wiring a duct air temperature sensor 28 Wiring an outdoor air temperature sensor 29 Wiring a CO2 sensor 30 Wiring an outdoor air quality sensor 32 Wiring a relative humidity sensor 33 Wiring a Humidistat...

Page 4: ...t 62 Status 62 Unit Configuration 63 Setpoints 70 Alarm Configuration 76 Service Configuration 78 Maintenance 82 Performance 85 Alarms 86 Linkage 88 I O Points 89 Appendix B Single Point Linkage and Device Address Binding 91 Single Point Linkage 91 Device Address Binding 92 Appendix C RTU Open Points Properties on the Equipment Touch 93 Navigation screens 93 Startup Wizard 95 Status Equipment Touc...

Page 5: ...y indicator BACnet and third party protocols On board DIP switches allow you to select the baud rate and choose one of the following protocols BACnet MS TP BACnet ARC156 Modbus Johnson N2 LonWorks Mixed systems Supports CCN air terminals using Linkage to BACnet RTU Open Air Source California Title 24 Includes advanced Fault Detection and Diagnostic Logic for Economizer Operation in accordance with...

Page 7: ...pter Equipment Touch or TruVu ET Display must be powered by an external power source See the specifications in each device s Installation and Start up Guide to determine the power required Network Comm port J19 For communication with the controller network using BACnet ARC156 156 kbps or BACnet MS TP 9600 bps 76 8 kbps Comm Option port For communication with the LonWorks Option Card Inputs 12 inpu...

Page 8: ...ower and digital outputs Environmental operating range 40 to 158 F 40 to 70 C 10 95 relative humidity non condensing NOTE Controllers should be mounted in a protective enclosure Vibration during operation all planes directions 1 5G 20 300 Hz Shock during operation all planes directions 5G peak 11 ms Shock during storage all planes directions 100G peak 11 ms Overall dimensions A B 6 1 2 in 16 5 cm ...

Page 9: ...ire to the BACnet MS TP or BACnet ARC156 network page 12 page 12 6 Wire inputs and outputs page 13 7 Wire sensors to the controller page 20 Field supplied hardware An RTU Open retrofit installation may require the following field supplied components wiring harness Part OPN RTUHRN transformer 24 Vac 20 VA minimum wiring Application dependent components carbon dioxide sensors damper damper actuator ...

Page 10: ...ouch components or leads Handle the board by its edges Isolate from high voltage or electrostatic discharge Ensure that you are properly grounded We highly recommend that you mount the RTU Open in the unit control panel WARNING When you mount the RTU Open Do not locate in an area that is exposed to moisture vibration dust or foreign material Follow NEC and local electrical codes Do not obstruct ac...

Page 11: ...wered by a Class 2 power source Take appropriate isolation measures when mounting it in a control panel where non Class 2 circuits are present Do not power pilot relays from the same transformer that powers the RTU Open Carrier controllers can share a power supply as long as you Maintain the same polarity Use the power supply only for Carrier controllers The RTU Open has an operating range of 21 6...

Page 12: ...be taken to ensure that the auxiliary transformer is in phase with the rooftop equipment s control power transformer See Using an auxiliary control power transformer page 9 To use the rooftop equipment control power transformer 1 Remove power from the 24 Vac transformer 2 Remove connector assembly from RTU Open s J1 connector 3 If the rooftop equipment has thermostat connection terminals connect w...

Page 13: ...uxiliary transformer s secondary hot non grounded legs If the voltage measured is less than 5 volts the transformers are in phase proceed to step 7 If you measure a voltage greater than 24 Vac then the phases are reversed 5 Correct the phase reversal by either of the following methods Remove the ground from the secondary at the auxiliary transformer and connect it to the other secondary Reverse th...

Page 14: ...ved 10 Optional Safety chain devices field installed normally closed Apply 24 Vac to this terminal jumper from J1 1 to J1 9 where no safety devices are installed Fire shutdown device field installed configurable as normally open or closed Enthalpy switch field installed configurable as normally open or closed ...

Page 15: ...he RTU Open s address to 01 point the arrow on the MSB SW1 switch to 0 and the arrow on the LSB SW2 switch to 1 10 s 1 s 1 3 4 5 2 7 8 9 6 0 1 3 4 5 2 7 8 9 6 0 SW1 SW2 MSB LSB 3 Turn on the RTU Open s power CAUTION The factory default setting is 00 and must be changed to successfully install your RTU Open The MAC address of the controller must be unique on its network To set the controller s comm...

Page 16: ...e RTU Open s power terminals 2 Check the communications wiring for shorts and grounds 3 Connect the communications wiring to the Network Comm J19 port s screw terminals labeled Net Net and Shield NOTE Use the same polarity throughout the network segment 4 Set the communication type and baud rate For Set DIP switches 1 and 2 to Set DIP switch 4 to MS TP The appropriate baud rate See the MS TP Baud ...

Page 17: ...ilter Status Remote Occupancy Door Contact Field supplied CRSTATUS005A00 CRSTATUS005A00 Field supplied Field supplied J1 10 J5 3 4 Input 6 AI 10K Thermistor Supply Air Temperature 33ZCSENSAT 33ZCSENDAT J2 1 2 N A Input 7 AI 10K Thermistor Outside Air Temperature 33ZCSENOAT J2 3 4 N A Input 8 BI 24 Vac Enthalpy Fan Status Filter Status Remote Occupancy Door Contact 33SENTHSW CRSTATUS005A00 CRSTATUS...

Page 18: ...vide a jumper from J1 1 to J1 9 if no safeties are used See To wire inputs and outputs page 16 for additional information on the RTU Open wiring harness assembly terminations Default input function Parallel screw terminal at J5 J5 1 J2 6 J5 3 J1 10 J5 5 J1 2 may be used in place of the associated flying leads at the harness Part OPN RTUHRN See To wire inputs and outputs page 16 for additional info...

Page 19: ...U Open has 8 binary outputs You can connect each output to a maximum of 24 Vac Vdc Each output is a dry contact rated at 3 A 24 V maximum and is normally open To size output wiring consider the following Total loop distance from the power supply to the controller and then to the controlled device NOTE Include the total distance of actual wire For 2 conductor wires this is twice the cable length Ac...

Page 20: ...appropriate jumpers on the RTU Open J3 AO 1 0 10 Vdc 4 20 mA W1 Battery Jumper In Do not remove W2 Format Jumper Out W3 Input 11 mA Jumper Out mA not used on this channel W4 Input 11 Thermistor In default position W5 Input 10 mA Jumper Out mA not used on this channel W6 Input 10 Thermistor Jumper In default position Turn off the RTU Open s power Connect the input wiring to the screw terminals on t...

Page 21: ... should only be done under the guidance of Carrier Control Systems Support Optional Safety chain devices field installed normally closed Apply 24 Vac to this terminal jumper from J1 1 to J1 9 where no safety devices are installed Fire shutdown device field installed configurable as normally open or closed Enthalpy switch field installed configurable as normally open or closed ...

Page 22: ... for these two input channels must not exceed 40 mA or a maximum of 25 mA per channel NOTE J4 Analog Inputs 1 and 2 may be set for the following device types IAQ Sensor OAQ Sensor Space RH Sensor J5 Inputs The terminals for Inputs 3 5 and 8 are available for use in place of the flying wire leads at Molex connectors J1 and J2 identified below NOTE J5 binary inputs 3 5 and 8 are the same input chann...

Page 23: ...itional functions 3 Compressor Safety Fan Status Filter Status Remote Occupancy Door Contact 5 Fire Shutdown Fan Status Filter Status Remote Occupancy Door Contact 8 Enthalpy Switch Fan Status Filter Status Remote Occupancy Door Contact 9 HumidiStat ICG Input Fan Status Filter Status Remote Occupancy Door Contact If Unit Type is set to LC Weather Expert and Heat Type is gas Input 9 is automaticall...

Page 24: ...e s Installation and Start up Guide All field control wiring that connects to the RTU Open must be routed through the raceway built into the corner post The raceway provides the UL required clearance between high and low voltage wiring 1 Pass the control wires through the hole provided in the corner post 2 Feed the wires through the raceway to the RTU Open 3 Connect the wires to the removable Phoe...

Page 25: ...e 29 33ZCSENOAT Factory supplied with Economizer CO2 sensor page 30 33ZCSPTCO2 01 33ZCSPTCO2LCD 01 33ZCT55CO2 33ZCT56CO2 Required only for demand control ventilation a dedicated 24 Vac transformer is required Outdoor air quality sensor page 32 33ZCTSENCO2 Optional with demand control ventilation Duct relative humidity sensor page 33 33ZCSENDRH 02 Space relative humidity sensor page 33 33ZCSENSRH 0...

Page 26: ...on 4 conductor shielded or unshielded CMP plenum rated cable Conductor 22 AWG 7x0096 bare copper if Rnet has only sensors Maximum length 500 feet 152 meters Insulation Low smoke PVC or equivalent Color Code Black white green red Shielding If shielded Aluminum Mylar shield 100 coverage with TC drain wire terminated at controller UL temperature rating 32 167 F 0 75 C Voltage 300 Vac power limited Li...

Page 27: ...ply line voltage mains voltage to the Wireless Adapter In order for the RTU Open to receive the signal from a wireless sensor the Wireless Adapter must be mounted inside the building and then connected to the RTU Open s Rnet port strictly adhering to the Rnet wiring specifications page 22 Do NOT mount the Wireless Adapter outdoors The Carrier wireless sensors are available in 868 902 and 928 MHz r...

Page 28: ...en bend and pull off the outer jacket of the Rnet cable s Do not nick the inner insulation Inner insulation Outer jacket Foil shield 25 in 6 cm Shield wire 3 Strip about 0 25 inch 0 6 cm of the inner insulation from each wire 4 Wire the Rnet Rnet and Gnd terminals on the controller s Rnet port to the terminals of the same name on the Wireless Adapter s Rnet connector NOTE If using shielded wire co...

Page 29: ...ring instructions To wire ZS sensors to the RTU Open page 22 The only device on the Rnet you can use a 2 conductor cable instead of the standard 4 conductor Rnet cable and follow the instructions below For complete Equipment Touch installation instructions including wiring diagrams see the Equipment Touch Installation and Setup Guide CAUTION The RTU Open can share a power supply with the Carrier c...

Page 30: ...RNING Do not apply line voltage main 24 Vdc power only Wiring power Wire the TruVu ET Display 24V DC connector to the 24 Vdc power supply using 2 conductor 18 AWG wire Maximum distance 100 feet 30 meters CAUTION The TruVu ET Display can share a power supply with the Carrier controller as long as The power supply is DC power You maintain the same polarity You use the power source only for Carrier c...

Page 31: ...n instructions see the TruVu ET Display Installation and Start up Guide Wiring a Supply Air Temperature sensor Part 33ZCSENSAT The RTU Open requires a temperature sensor installed in the supply air stream The Supply Air Temperature SAT sensor is used to properly control the SAT to the maximum and minimum supply air temperature limits provide integrated economizer operation and control the supply f...

Page 32: ...SENDAT The RTU Open requires a temperature sensor installed in the supply air stream The Duct Temperature DAT sensor is generally used when the rooftop unit is NOT equipped with electric heating Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 feet 152 meters To wire a DAT sensor to the controller...

Page 33: ...SENOAT Outdoor Air Temperature OAT is required to use all of the RTU Open s features OAT may be provided by a local sensor shown below or a linked sensor in another controller See Single Point Linkage page 91 Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 feet 152 meters To wire an OAT sensor to...

Page 34: ...nted in a return air duct Duct installation requires an Aspirator Box Accessory Part 33ZCASPCO2 The sensor has a range of 0 2000 ppm and a linear 4 20 mA output The CO2 sensor s power requirements exceed what is available at J4 1 and 4 Provide a dedicated 24Vac transformer or DC power supply Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 ...

Page 36: ...quires an Aspirator Box Accessory Part 33ZCASPCO2 The sensor has a range of 0 2000 ppm and a linear 4 20 mA output The CO2 sensor s power requirements exceed what is available at J4 1 and 4 Provide a dedicated 24 Vac transformer or DC power supply Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 f...

Page 37: ... monitors humidity but provides no control NOTE You cannot use a relative humidity sensor when using both a CO2 and OAQ sensor on the controller Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 feet 152 meters To wire a separate dedicated RH sensor to the controller 1 Strip the outer jacket from t...

Page 38: ... NOTE The humidistat is NOT an option for LC WeatherExpert units with gas heat You must use the RH sensor for humidity control Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 feet 152 meters To wire a humidistat to the controller 1 Strip the outer jacket from the cable for at least 4 inches 10 2 ...

Page 39: ...as a cooling source based on the heat content of the air Differential enthalpy control requires installing a 33CSENTSEN enthalpy sensor in the rooftop unit s return air duct Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Maximum length 500 feet 152 meters To wire an enthalpy switch outdoor air to the controller An...

Page 40: ...NOTES Factory installed enthalpy switches terminate at J2 wires 6 switch input and 7 24 Vac Input channel must be configured for the enthalpy contact N O or N C that you use Wiring diagram for factory installed enthalpy switch NOTE Factory installed enthalpy switches terminate at J2 wires 6 switch input and 7 24 Vac ...

Page 41: ...e return air for differential enthalpy Wiring a status switch Filter Part CRSTATUS005A00 or field supplied Fan status Part CRSTATUS005A00 or field supplied Filter and or fan status switches may be installed to provide a Dirty Filter indication or Fan Running status Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded If 100 ft 30 5 meters 22 AWG shielded Ma...

Page 42: ...r Door Contacts if they have not already been used for their default functions Follow device manufacturer s installation and operating instructions Wiring a compressor safety This is typically provided by the manufacturer with the rooftop equipment A compressor safety status may be monitored if available Wiring specifications Cable from sensor to controller If 100 ft 30 5 meters 22 AWG unshielded ...

Page 43: ...urer s installation and operating instructions Wiring an occupancy switch or door contact Occupancy switch field supplied Door contact field supplied Occupancy or door contact switches may be installed to provide an alternate means of occupancy determination or heating and cooling lockout See Sequence of Operation page 44 for additional details Wiring specifications Cable from sensor to controller...

Page 44: ...rved 40 To wire an occupancy switch or door contact NOTES Binary Inputs 3 5 8 and 9 are configurable and may be used for Fan Status Filter Status Remote Occupancy or Door Contacts provided they have not been used for their default functions Follow device manufacturer s installation and operating instructions ...

Page 45: ...he wiring polarity use a USB isolator between the computer and the USB Link Purchase a USB isolator online from a third party manufacturer Service Test Navigation i Vu Field Assistant Properties Equipment Configuration Service Configuration Service Test Service Test can be used to verify proper operation of compressors heating stages indoor fan power exhaust fans economizer and dehumidification It...

Page 46: ... Compressor 2 BO 4 output Always test the Compressor 1 output first For all units except the LC WeatherExpert Compressor 1 Test output must be set to Enable for Compressor 2 Test to function Use the Reversing Valve Test to activate and deactivate the reversing valve BO 7 output Applicable to Unit Type HP O B Ctrl only Use the Dehumidification Test to activate and deactivate the Humidi MiZer BO 6 o...

Page 47: ...rties affect the unit operation and or control Review and understand the meaning and purpose of each property before changing it Unit Configuration properties page 63 Setpoint Configuration properties page 70 Service Configuration properties page 78 Linkage properties page 88 Equipment Touch Startup Wizard page 95 See Appendix A page 93 for a complete list of the controller s points properties NOT...

Page 48: ...er using an Equipment Touch or Field Assistant A BACnet schedule configured in the i Vu application networked through an i Vu Open Router A BACnet or local schedule configured for subordinate VVT Zones networked through an i Vu Open Router s and employing Linkage To set up occupancy schedules see the documentation for your user interface NOTE A BACnet schedule downloaded from the i Vu application ...

Page 49: ...chedules 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 Fire Shutdown Safety chain Supply Air Temp Sensor alarm Space Temp Sensor alarm The RTU Open does not include smoke control functions...

Page 50: ...imer functions are available 1 for each stage of compression This function tracks the number of compressor run hours and generates an alarm when the accumulated runtime exceeds the threshold set by the adjustable compressor service alarm timers Economizer The RTU Open provides an analog economizer output for rooftop units with economizer dampers Economizer dampers may be used to provide indoor air...

Page 51: ...er is modulating MUST be above any minimum configured position and between 25 and 100 the FDD logic monitors the current and previous SAT economizer commanded position and the OAT Failed to Open If the FDD logic detects an increase in damper position for example from 50 to 65 it expects to also detect a decrease in SAT If the SAT failed to decrease or no change in SAT is detected the FDD logic gen...

Page 52: ...during unoccupied periods The following conditions must be true for unoccupied free cooling to operate Unocc Free Cool Enable set to Enable The system is unoccupied The outside air temperature is below the Economizer High OAT Lockout Temp setpoint The outside air temperature is less than the space temperature Enthalpy if enabled is Low When the RTU Open schedule is unoccupied and the space tempera...

Page 53: ...perature Compensated Optimal Start is a second start method used for gas or electric heating applications It switches from unoccupied to the occupied setpoints at a calculated time prior to occupancy This minimizes the operation of the unit s fan The Optimal Start recovery period may begin as early as 4 hours prior to occupancy The time at which the setpoints move is based on the difference betwee...

Page 54: ...oor Air CO2 is controlled on rooftop equipment with an economizer Indoor Air CO2 sequence is enabled by installing an air quality CO2 sensor A CO2 sensor may be terminated at the RTU Open or a subordinate zone controller when part of a zoned system An outdoor air quality sensor may also be installed and terminated at the RTU Open but it is not required When an outdoor air quality sensor is not ins...

Page 55: ...cle timers are employed to protect the equipment from short cycling There are fixed one minute minimum on and off times for each heating output During heating operation the RTU Open may reduce the number of active stages if the rooftop Supply Air Temperature exceeds the Maximum Heating SAT setpoint A heat stage turned off in this fashion may be started again after the normal time guard period has ...

Page 56: ...idity falls below the active setpoint by a 5 fixed Hysteresis when a humidity sensor is used or when there is no longer a call for dehumidification where a humidistat is used See the base unit Humidi MiZer operations manual for additional information Demand Limiting The RTU Open may employ a demand limit strategy Demand limiting in the RTU Open works through setpoint expansion The controller s hea...

Page 57: ...uipment A Compressor Safety Alarm is shown on Properties page Control Program tab Alarms and 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 When configured for Heat Pump and in the heating mode a compressor safety fault will cause the available stages of electric heating to b...

Page 58: ...re the RTU Open to monitor the base unit s compressor safety circuit This alarm indicates the base unit s compressor safety circuit is energized Cooling heating and supply fan outputs are not interrupted except when the RTU Open is configured for Heat Pump Normal operation resumes when the compressor safety circuit is de energized If the Heat Pump is a HP O B Ctrl type and is in the heating mode i...

Page 59: ...e Humidity The RTU Open generates a Space Relative Humidity alarm if the space humidity level exceeds the configured low or high alarm limits This alarm is only shown when a valid relative humidity sensor value is available Space Relative Humidity Sensor The RTU Open generates a Space Relative Humidity Sensor alarm if a valid sensor value is no longer available For locally connected sensors the mA...

Page 60: ... Supply Fan Service Timer value to 0 disables the supply fan runtime alarm function Compressor 1 Runtime The RTU Open generates this alarm when the accumulated runtime exceeds the Unit Configuration Compressor 1 Service Alarm Timer value when not set to 0 This alarm is most commonly used to indicate an equipment maintenance interval is due The Compressor 1 Runtime accumulator may be reset by setti...

Page 61: ...The setpoints and zone temperature from the zone with the greatest demand for the requested air source mode heating or cooling This zone is called the reference zone The system occupancy status Most open damper position from any zone RH and CO2 values if applicable The air source responds by sending the air source mode supply air temperature and outside air temperature The air source verifies the ...

Page 62: ...eating SAT Linkage transmits the Linkage Pressurization mode to maximize the amount of airflow through the RTU and prevent any safety limit switches from operating CAUTION It is important to properly set the value for the Maximum Heating SAT to match the value specified from the equipment product data recommendations Many rooftops have heat capacity that will provide a higher heat rise resulting i...

Page 63: ...twork segment DO The binary output is active The Run and Error LED s indicate controller and network status If Run LED shows And Error LED shows Status is 2 flashes per second Off Normal 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 The controller has just been formatted 2 flashes per second On Exec...

Page 64: ...are To obtain a modstat in the i Vu interface 1 Select the RTU Open in the navigation tree 2 Right click and select Module Status To replace the RTU Open s battery To determine when to replace the battery remove power and measure the voltage If the voltage is below 2 9 volts you need to replace the battery CAUTION Power must be ON to the RTU Open when replacing the battery or your date time and tr...

Page 65: ...armful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense CAUTION Changes or modifications not expressly approved by the responsible party for compliance could void the user s authority to operate the equipment CE Compliance WARNING This...

Page 66: ...IAQ Override Pre occ Purge IGC Override Supply Fan Status The current fan status if an input is configured for Fan Status R Off Running Fan Speed The current commanded fan speed if Fan Control is set to Two Speed R Off Low High Supply Fan VFD The current commanded output to the VFD to control the fan s speed if Fan Control is set to Variable Speed R Off Low High Space Temperature Prime Variable Th...

Page 67: ...am Configuration Unit Configuration Point Name Description Range Fan Mode The supply fan s operating mode Options Auto The fan cycles on off in conjunction with heating or cooling Continuous The fan runs continuously during occupancy and intermittently during unoccupied periods with heating or cooling Always On The fan runs continuously regardless of occupancy or calls for heating and cooling D R ...

Page 68: ... Alarm Delay Determines the amount of delay before a door alarm is generated D R 60 seconds 0 to 3600 seconds Pushbutton Override Enables or disables the use of a pushbutton override from a local space temperature sensor D R Enable Disable Enable Setpoint Adjustment Enables or disables the setpoint adjustment mechanism on the local space sensor Not displayed unless ZS or SPT sensor is connected D ...

Page 69: ...n BAS On Off Occupancy is set over the network by another device or a third party BAS Remote Occ Input Occupancy is set by a remote contact D R Always Occupied Always Occupied BACnet Schedule BAS On Off Remote Occ Input Input Configuration Input 1 Function The type of sensor 4 20 mA connected to terminals J4 4 5 and 6 D R No Sensor No Sensor IAQ Sensor OAQ Sensor Space RH Sensor Input 2 Function T...

Page 70: ...hardware contact D R Enthalpy Switch No Function Enthalpy Switch Fan Status Filter Status Remote Occupancy Door Contact Input 8 Switch Configuration The normal de energized state for the set of contacts terminated at Input 8 D R NO NO NC normally open normally closed Input 9 Function The usage of Input 9 You must also set Input 9 Switch Configuration Options No Function The input is not used Humid...

Page 71: ...o use additional ZS Sensors Network Type Set to Rnet Address Enter the DIP switch settings that are on the additional ZS sensors up to 5 total Lock Display Check to make the sensor display only D Index 1 Network Type Rnet Address 1 ZS Zone Temp Configure additional ZS temperature sensors used on the RTU Open Use Check to include ZS sensors value in the Combined Algorithm Average is the default Raw...

Page 72: ...mum Input Smoothing Medium Show on Sensors Calculated Value Display Resolution 1 COV Increment 1 ZS Zone CO2 Configure additional ZS CO2 sensors used on the RTU Open Use Check to include ZS sensors value in the Combined Algorithm Maximum is the default Raw Value Displays sensed CO2 for each ZS CO2 sensor s address Calibration If needed enter value to adjust the Corrected Value from the Raw Value i...

Page 73: ...connected to one of the hardware input channels R 0 to 5000ppm Outdoor AQ Displays the value read from an outdoor CO2 sensor connected to one of the hardware input channels 0 to 5000ppm Supply Air Temperature Displays the current supply air temperature R 56 to 245 F 48 9 to 118 3 C Supply Air Temp Calibration A calibration offset value to allow the supply air temperature sensor to be adjusted to m...

Page 74: ...tegy expands the occupied heating and cooling setpoints when the system reaches one of 3 levels of consumption With the expanded setpoints the equipment works less thereby saving energy By default Demand Level 1 expands the occupied heating and cooling setpoints by 1 F 5 C Demand Level 2 by 2 F 1 1 C and Demand Level 3 by 4 F 2 2 C If the occupied heating or cooling setpoints change the effective ...

Page 75: ...one application the cooling requirement begins as soon as the space temperature exceeds the Occupied Cooling setpoint We recommend that the Occupied Cooling 1 value be set no less than 0 5 F 27 C above the Occupied Cooling setpoint 77 F 25 C 78 F 25 5 C 79 F 26 1 C 81 F 27 2 C Occupied Cooling 2 Orange The space temperature must be greater than the Occupied Cooling 2 setpoint to generate a high sp...

Page 76: ...ling 2 setpoint to generate an unoccupied high space temperature alarm We recommend that this value be set no less than 0 5 F 27 C above the Unoccupied Cooling 1 setpoint D R 93 F 33 9 C 45 to 99 F 7 2 to 37 2 C Point Name Description Default Range Heating Capacity Used for Optimal Start this is the rate at which the zone temperature changes when the heating system runs at full capacity to maintai...

Page 77: ...upied heating setpoint 70 75 5 70 5 Occupied cooling setpoint 76 5 hysteresis 5 hysteresis D R 5 F 27 C 0 to 120 F 0 to 66 6 C Learning Adaptive Optimal Start When the Learning Adaptive Optimal Start algorithm runs the learned heating capacity or learned cooling capacity values are adjusted based on the color that is achieved when occupancy begins The adjustment amounts for each color are displaye...

Page 78: ...ating Occupied or Unoccupied depending on mode The current programmed Heating setpoint adjusted by any offset that may be in effect R 0 to 120 F 17 7 to 48 9 C Cooling Occupied or Unoccupied depending on mode The current programmed Cooling setpoint adjusted by any offset that may be in effect R 0 to 120 F 17 7 to 48 9 C Learned cooling capacity The cooling capacity learned by Learning Adaptive Opt...

Page 79: ...rt Type is Temp Compensated this is the time in minutes per degree that the equipment starts before the occupied period when the space temperature is below the occupied heating setpoint including any setpoint offset D R 15 00 0 to 99 Cool Start K factor min deg If Optimal Start Type is Temp Compensated this is the time in minutes per degree that the equipment starts before the occupied period when...

Page 80: ...occupied High SPT Alarm Limit The value that the space temperature must exceed to generate a Space Temperature Alarm in the unoccupied mode There is a fixed hysteresis of 1 F 5 C for return to normal D R 95 F 35 C 45 to 100 F 7 2 to 37 7 C Supply Air Temperature Alarm Low SAT Alarm Limit The value that the supply air temperature must drop below to generate a Supply Air Temp Alarm There is a fixed ...

Page 81: ...nsors with display if the fire shutdown circuit trips D R Ignore Ignore Display Compressor Safety Chain Alarm If set to display shows the alarm indicator on the communicating zone sensors with display if the safety chain circuit trips D R Ignore Ignore Display Space Temperature High Low Alarm If set to display shows the alarm indicator on the communicating zone sensors with display if the space te...

Page 82: ...t 1 and 2 functions D R Ignore Ignore Display Compressor 1 Runtime Alarm If set to display shows the Maintenance or Fault indicator on the communicating zone sensors with display if the Compressor 1 Runtime exceeds the value of the Compressor 1 Service Alarm Timer D R Ignore Ignore Display Compressor 2 Runtime Alarm If set to display shows the Maintenance or Fault indicator on the communicating zo...

Page 83: ...x VFD Output The maximum output signal the control supplies to the VFD as a percentage of its range The balancer can set this to adjust the unit s maximum airflow Applies to Variable Speed fan control only D R 100 33 to 100 Min VFD Output The minimum output signal the control supplies to the VFD as a percentage of its range The balancer can set this to adjust the unit s minimum airflow Applies to ...

Page 84: ...O2 value that corresponds to a 4 mA input at the appropriate input channel D R 0 ppm 0 to 9999 ppm Outdoor CO2 Sensor Value Max mA The CO2 value that corresponds to a 20 mA input at the appropriate input channel D R 2000 ppm 0 to 9999 ppm System Space Temperature The network space temperature value that the controller is using for control if applicable D R 999 00 N A System Space RH The network re...

Page 85: ...isable Disable Enable Compressor 2 Test Enable to test the controller s compressor 2 output Service Test must be set to Enable D R Disable Disable Enable Heat 1 Test Enable to test the controller s heat 1 output Service Test must be set to Enable D R Disable Disable Enable Heat 2 Test Enable to test the controller s heat 2 output Service Test must be set to Enable D R Disable Disable Enable Revers...

Page 86: ... controller s I O terminals Network A network temperature sensor is bound to the controller s space temperature AV Airside Linkage The space temperature from a linked terminal Locked Value The controller s space temperature input has been manually locked at a value ZS Sensor A ZS sensor is connected to the controller s Rnet port R Sensor Failure SPT Sensor T55 T56 Network Airside Linkage Locked Va...

Page 87: ...es a completed circuit from J1 1 to J1 9 This circuit is typically used for safety devices that immediately stop unit operation when tripped R Off Run Enabled Fire Shutdown Status Shutdown indicates that a fire shutdown is in effect R Run Enabled Shutdown Compressor Safety Status Trouble indicates that the compressor safety device has tripped R Normal Trouble Calculated Min Econ Pos Indicates the ...

Page 88: ...rmines the occupancy state of the controller and can be set over the network by another device or third party BAS Options Inactive Occupancy is determined by a configured schedule Occupied The controller is always in the occupied mode Unoccupied The controller is always in the unoccupied mode NOTE If BAS On Off is set to either Unoccupied or Occupied the Optimal Start routine is automatically disa...

Page 89: ...nce the last reset of Performance Data R 0 to 100 Unocc Free Cool Utilization Percentage of Equipment Runtime hours that are above active Unoccupied Free Cooling since the last reset of Performance Data R 0 to 100 Part Load Cooling Utilization Percentage of Equipment Runtime hours that are above Cooling time in which less than the maximum configured cooling stages were active since the last reset ...

Page 90: ... Part Load Cooling Utilization Percentage of Equipment Runtime hours that the Cooling with less than the maximum configured number of cooling stages was active in the previous period that was prior to the last Performance Data reset R 0 to 100 Full Load Cooling Utilization Percentage of Equipment Runtime hours that the Cooling with all of the configured number of cooling stages was active in the p...

Page 91: ...m limit R Normal Alarm Indoor Air Quality Sensor Indicates that a valid indoor air quality sensor or sensor value is no longer available to the controller R Normal Alarm Space Relative Humidity Indicates that a valid space relative humidity sensor exceeds the configured alarm limits R Normal Alarm Space Relative Humidity Sensor Indicates that a valid space relative humidity sensor or sensor value ...

Page 92: ...e Collector s details Click to see the following properties on the Summary tab of microblock popup Application Type This parameter indicates the type of Linkage application Display only D Airside Linkage Application Instance Should always be 1 for i Vu Field Assistant Systems NOTE If using a CCN and BACnet System i e CCN Air Terminal to BACnet Air Source the Application Instance can be 1 2 3 or 4 ...

Page 93: ...y control program logic i Vu users logged in as Power User and above are able to edit various parameters associated with the input channels and the display names for all channels We strongly recommend that you leave these parameters at their defaults The RTU Open is not a programmable controller I O can only be used for the purpose designed in the equipment control program Modifying these paramete...

Page 94: ...er configurable for No Function Fire Shutdown Fan Status Filter Status Remote Occupancy or Door Contact input 8 Input Channel 8 Dry Contact only User configurable for No Function Enthalpy Fan Status Filter Status Remote Occupancy or Door Contact input 9 Input Channel 9 Dry Contact only User configurable for No Function Humidistat Fan Status Filter Status Remote Occupancy Door Contact or IGC Overri...

Page 95: ...ace on the Properties page Network Points tab The following example involves outside air temperature System Heat Cool Demand Level behaves similarly except that their usage involves a specific application loaded on a Universal Controller Open See UC Open Installation Guide for additional information In either case note that the BACnet type and instance numbers specified in the Address field of the...

Page 96: ...Open or BACnet controllers when they are installed as part of an i Vu Control System The data transfer takes the form of DAB which you must configure Currently the controller implements DAB for the following variables System Outdoor Air Temperature System Occupancy System Leaving Load Water Temp System Control Setpoint System Cool Demand Level System Space RH You can implement DAB on network point...

Page 97: ...Screen Names Display Details Standby Screen displays after the Inactivity Timer expires default is 5 minutes Displays Space temperature Current setpoints Mode Occupancy OAT if available Not an interactive screen Touch anywhere to advance to Home screen Home Displays Space temperature Current setpoints Mode Occupancy OAT if available Allows Pushbutton Override Space Setpoint Offset Adjustment Click...

Page 98: ...avigates to Alarm status Schedules Trends Back to the Home screen click on the left Forward to RTU Properties Menu screen click on the right RTU Open Properties Navigates to Property pages Login with one of the following passwords User level type user Admin level type admin Factory level type Touch NOTE Only the buttons that are authorized for a specific password level are visible Show Hide Config...

Page 99: ...ingle Speed Two Speed Variable Speed Economizer Exists Set to Yes to enable economizer control for units equipped with an economizer damper D R No No Yes Economizer High OAT Lockout Temp The outdoor air temperature above which economizer cooling is inhibited D R 75 F 23 9 C 55 to 80 F 12 7 to 26 6 C Vent Dmpr Pos DCV Min Pos The minimum outdoor air damper position maintained during occupied period...

Page 100: ...sor 4 20 mA connected to terminals J4 4 5 and 6 D R No Sensor No Sensor IAQ Sensor OAQ Sensor Space RH Sensor Input 2 Function The type of sensor 4 20 mA connected to terminals J4 1 2 and 3 D R No Sensor No Sensor IAQ Sensor OAQ Sensor Space RH Sensor Input 3 Function The usage of Input 3 You must also set Input 3 Switch Configuration Options No Function The input is not used Compressor Safety Saf...

Page 101: ...gh humidity condition Fan Status Proves supply fan operation Filter Status Indicates a dirty filter Remote Occupancy Sets occupancy using a hardware contact Door Contact Sets occupancy using a hardware contact IGC Override Monitors the flame output from the Integrated Gas Control board The input detects if a flame is still present after heating has been disabled D R Humidistat No Function Humidist...

Page 102: ...ction is set to IAQ Sensor or a value received through the Network or Linkage R 0 to 5000ppm Outdoor Air Quality CO2 ppm The current outdoor air CO2 concentration if the Configuration Unit Configuration Input 1 or 2 Function is set to OAQ Sensor R 0 to 5000ppm Economizer Output The current economizer output with respect to the outdoor air damper if equipped R 0 to 100 Open Shutdown When Active all...

Page 103: ...ensor D R Enable Disable Enable Setpoint Adjustment Enables or disables the setpoint adjustment mechanism on the local space sensor Not displayed unless ZS or SPT sensor is connected D R Enable Disable Enable Setpoint Adjustment Range The maximum amount that a user can adjust the setpoint on the local ZS or SPT sensor Not displayed unless ZS or SPT sensor is connected D 5 F 2 7 C Cooling Lockout T...

Page 104: ...amp but change immediately from unoccupied to occupied values Temp Compensated Unit changes to occupied setpoints at a variable time prior to the occupied time which is calculated by the current difference between space temperature and the appropriate heating or cooling setpoint At that time the setpoints do not ramp but change immediately from unoccupied to occupied values Learning Adaptive Start...

Page 105: ...ature must exceed before an occupied SPT alarm is generated The alarm returns to normal when the space temperature drops below the high effective setpoint or rises above the low effective setpoint D R 5 F 2 7 C 0 to 20 F 0 to 11 1 C Unoccupied Low SPT Alarm Limit The value that the space temperature must drop below to generate a Space Temperature Alarm in the unoccupied mode There is a fixed hyste...

Page 106: ...eed to generate an IAQ Alarm in the occupied mode There is a fixed hysteresis of 100ppm for return to normal Requires a valid Indoor Air Quality CO2 sensor value and IAQ Control is set to Enable D R 1200ppm 0 to 9999 ppm Maintenance Equipment Touch Navigation Equipment Touch Properties Control Program Maintenance Point Name Description Default Range Unit Occupancy Status The controller s occupancy...

Page 107: ...rmines the occupancy state of the controller and can be set over the network by another device or third party BAS Options Inactive Occupancy is determined by a configured schedule Occupied The controller is always in the occupied mode Unoccupied The controller is always in the unoccupied mode NOTE If BAS On Off is set to either Unoccupied or Occupied the Optimal Start routine is automatically disa...

Page 108: ...he last reset of Performance Data R 0 to 100 Part Load Cooling Utilization Percentage of Equipment Runtime hours that are above Cooling time in which less than the maximum configured cooling stages were active since the last reset of Performance Data R 0 to 100 Full Load Cooling Utilization Percentage of Equipment Runtime hours that are above Cooling time in which all of the configured cooling sta...

Page 109: ...l Alarm Supply Fan in Hand The supply fan is operating when commanded off R Normal Alarm Indoor Air Quality Indicates if the occupied CO2 level exceeds the configured high alarm limit R Normal Alarm Indoor Air Quality Sensor Indicates that a valid indoor air quality sensor or sensor value is no longer available to the controller R Normal Alarm Space Relative Humidity Indicates that a valid space r...

Page 110: ...icate configuration exists at the analog Input 1 2 Functions R Normal Alarm Supply Fan Runtime Indicates if the supply fan runtime exceeds the value of the Supply Fan Service Alarm Timer R Normal Alarm Compressor 1 Runtime Indicates if the compressor 1 runtime exceeds the value of the Compressor 1 Service Alarm Timer R Normal Alarm Compressor 2 Runtime Indicates if the compressor 1 runtime exceeds...

Page 111: ...tions Added surge CAUTION to Protection specification X TS AK E CC 10 29 18 To wire the Wireless Adapter for wireless sensors Added warning that the Wireless Adapter must be mounted on the inside of the building C AE WB E What is the RTU Open Removed SPT sensors C D Field supplied hardware Removed SPT sensors from space temperature sensors C D Wiring inputs and outputs Removed SPT sensor from Inpu...

Page 112: ...s sensors New Topics C D Wiring devices to the RTU Open s Rnet port Added Wireless Adapter for wireless sensors C D Input wiring specifications Added Wireless Adapter for wireless sensors C D To wire the controller to the network Added BACnet ARC156 connection information C D Wiring for communications Changed from Wiring the RTU Open to the MS TP network C D Specifications Added BACnet ARC156 conn...

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Page 114: ...CARRIER CORPORATION 2019 A member of the United Technologies Corporation family Stock symbol UTX Catalog No 11 808 499 01 12 3 2019 ...

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