Carrier 50HCQ04-12 User Manual

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48/50TC04 ---28, 50TCQ04---12 48/50HC04---14, 50HCQ04---12 Factory Installed Option R T U --- O P E N

Controls, Start---Up, Operation

and Troubleshoot ing Instruct io ns

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 2.........................

GENERAL 2.........................................

SENSOR/ACCESSORY INSTALLATION 2................

Sensors and Accessories 4.............................

User Interfaces 4.....................................

Install Analog Sensors 4...............................

Supply Air Sensor (SAT) 4...........................

Outdoor Air Sensor (OAT) 4..........................

Space Temperature Sensor (SPT) 4.....................

Sensor(s) (IAQ and OAQ) 6......................

Relative Humidity Sensors 8..........................

Installing Discrete Inputs 8.............................

Compressor Safety 8................................

Humidistat 8......................................

Single Enthalpy (Outdoor Enthalpy) 8..................

Differential Enthalpy 8..............................

Fire Shutdown 9...................................

Filter Status 9......................................

Fan Status 9.......................................

Remote Occupancy 9................................

Communication Wiring--Protocols 10.....................

General 10........................................

I--Vu OPEN 10....................................

BACnet MS/TP 10.................................

Modbus 11.......................................

Johnson N2 11.....................................

LonWorks 11......................................

Local Access 12....................................

START--UP 13........................................

Additional Installation/Inspection 13.....................

Service Test 13......................................

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 16.......................................

USERPW 17......................................

OPERATION 17......................................

Occupancy 17.......................................

Indoor (Supply) Fan 17...............................

Cooling 18.........................................

Economizer 18......................................

Power Exhaust 18....................................

Heating 18.........................................

Indoor Air Quality 19.................................

Dehumidification 19..................................

Demand Limit 19....................................

Unoccupied Free Cooling 19...........................

Optimal Start 20.....................................

Fire Shutdown 20

Compressor Safety 20.................................

Fan Status 20.......................................

Filter Status 20......................................

Door Switch 20......................................

Linkage 20.........................................

TROUBLESHOOTING 21..............................

General 21.........................................

Thermistor Troubleshooting 21.........................

Software Version 21..................................

Communication LED’s 22.............................

Alarms 24..........................................

Third Party Networking 26.............................

APPENDIX A -- USER INTERFACE MENUS 27............

APPENDIX B -- THIRD PARTY POINTS LIST 36...........

RTU --OPEN START --UP SHEET 41......................

....................................

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

Catalog No:48---50HCTQ ---01T

Replaces: NEW

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform the basic maintenance functions of replacing filters. Trained service personnel should perform all other operations.

When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes. Wear safety glasses and work gloves.

Follow all safety codes. Wear safety glasses and work gloves. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and National Electrical Code (NEC) for special requirements.

Recognize safety information. This is the safety--alert symbol

instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Disconnect all power to the unit before performing maintenance or service. Unit may automatically start if power is disconnected.

. When you see this symbol on the unit and in

WARNING

GENERAL

The RTU--OPEN controller is an integrated component of the Carrier 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, Carrier’s I--Vu Open network, 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 use today: BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 1.)

Carrier’s diagnostic display tools such as Field Assistant BACview6 Handheld or Virtual BACview can be used with the RTU--OPEN controller. Access is available via a 5--pin J12 access port.

SENSOR/ACCESSORY

INSTALLATION

There are a variety of sensors and accessories available for the RTU-OPEN. Some of these can be factory or field installed, while others are only field installable. The RTU-OPEN controller may also require connection to a building network system or building zoning system. All field control wiring that connects to the RTU-OPEN must be routed through the raceway built into the corner post of the unit or secured to the unit control box with electrical conduit. The unit raceway provides the UL required clearance between high and low-voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU-OPEN. Connect the wires to the removable Phoenix connectors and then reconnect the connectors to the board. See Fig. 1 and Table 1 for board connections and Fig. 2 for Typical Factory RTU-OPEN wiring.

IMPORTANT: Refer to the specific sensor or accessory instructions for its proper installation and for rooftop unit installation refer to base unit installation instructions and the unit’s wiring diagrams.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury, death and/or equipment damage.

Disconnect electrical power and use lock--out tags before wiring the RTU--OPEN controller.

Fig. 1 -- RTU--OPEN Control Module

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Table 1 – RTU--OPEN Inputs and Outputs

POINT NAME

Space Temp / Zone Temp zone_temp AI (10K Thermistor) J 2 0 --- 1 , 2 Supply Air Temperature sa_temp AI (10K Thermistor) J 2 --- 1 , 2 Outdoor Air Temperature oa_temp AI (10K Thermistor) J2 --- 3 , 4 Space Temperature Offset Pot stpt_adj_offset AI (100K Potentiometer) J 2 0 --- 3 Safety Chain Feedback safety_status DI (24 VAC) J 1 --- 9 Compressor Safety Status comp_status DI (24 VAC) J 1 --- 2 Fire Shutdown Status firedown_status DI (24 VAC) J 1 --- 1 0 Enthalpy Status enthalpy_status DI (24 VAC) J 2 --- 6 Humidistat Input Status humstat_status DI (24 VAC) J 5 --- 7

Indoor Air CO2 iaq A I ( 4 --- 2 0 m a ) Outdoor Air CO2 oaq A I ( 4 --- 2 0 m a ) Space Relative Humidity space_rh A I ( 4 --- 2 0 m a ) Supply Fan Status* sfan_status DI (24 VAC) Filter Status* filter_status DI (24 VAC) Door Contact Input* door_contact_status DI (24 VAC) Occupancy Contact* occ_contact_status DI (24 VAC)

Economizer Output econ_output A O ( 4 --- 2 0 m a ) J 2 --- 5 SupplyFanRelayState sfan DO Relay (24VAC , 1A) J 1 --- 4 Compressor 1 Relay State comp_1 DO Relay (24VAC , 1A) J 1 --- 8 Compressor 2 Relay State comp_2 DO Relay (24VAC , 1A) J 1 --- 7 Heat Stage 1 Relay State heat_1 DO Relay (24VAC , 1A) J 1 --- 6 Heat Stage 2 Relay State heat_2 DO Relay (24VAC , 1A) J 1 --- 5 Power Exhaust Relay State pexh DO Relay (24VAC , 1A) J 1 1 --- 3 Dehumidification Relay State dehum DO Relay (24VAC, 1A) J 1 1 --- 7 , 8

* These inputs (if installed) take the place of the default input on the specific channel

Pa r a l l e l pin s J 5 --- 1 = J 2 --- 6 , J 5 --- 3 = J 1 --- 1 0 , J 5 --- 5 = J 1 --- 2 a r e u s e d f o r f i l e d in s t a l l a t i o n .

Refer to the input configuration and accessory sections for more detail.

BACnet OBJECT

NAME

DEDICATED INPUTS

CONFIGURABLE INPUTS

TYPE OF I/O

OUTPUTS

CONNECTION PIN

NUMBER(S)

J 4 --- 2 o r J 4 --- 5

J 5 --- 1 o r J 5 --- 3 o r

J55orJ5---7

Sensors and Accessories

The RTU-OPEN controller is configurable with the following field-supplied sensors:

NOTE: Supply air temperature sensor (33ZCSENSAT) is factory-installed.

S Space temperature sensor (SPS, SPPL, SPP, SPPF,

33ZCT55SPT, 33ZCT56SPT, or 33ZCT59SPT

S Indoor air quality sensor (33ZCSENCO2,

33ZCT55CO2, 33ZCT56CO2) required for demand control ventilation.

S Outdoor air quality sensor (33ZCTSENCO2)

aspirator box (C33ZCCASPCO2) required for CO

S CO

return duct/outside air applications

S Outdoor air enthalpy switch (33CSENTHSW) S Return air enthalpy sensor (33CSENTSEN) required for

differential enthalpy control

S Space relative humidity sensor (33ZCSENSRH-01) S Duct relative humidity (33ZCSENDRH-01) S Humidistat (--HL--38MG-029) S Smoke Detectors (CRSMKSEN002A00,

CRSMKKIT002A00)

S Fan and/or Filter Status (CRSTATUS001A00,

CRSTATUS005A00)

User Interfaces

S BACview 6 Handheld (BV6H)

S Virtual BACview (USB-L or USB-TKIT required) S Field Assistant (USB-TKIT required)

Install Analog Sensors

Supply Air Sensor (SAT)

The factory supplies the discharge (supply) air sensor with the unit and is pre--wired. On 04-16 size units, the SAT is secured to the unit’s supply duct opening. This sensor must be relocated into the supply duct during unit installation. On 17-30 size units, the SAT is mounted through the side of the heat chamber below the fan deck, and does NOT require relocation.

OutdoorAirSensor(OAT)

The OAT is supplied with the economizer option or accessory. It is wired through the 12-pin plug (PL6) in the return air section of the unit and is mounted on the economizer assembly.

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. Each type has a variety of options consisting of: timed override button, set point adjustment, a LCD screen, and communication tie in. Space temperature can be also be written to from a building network or zoning system. However, it is still recommended that return air duct sensor be installed to allow stand-alone operation for back-up. Refer to the configuration section for details on controller configurations associated with space sensors.

Fig. 2 -- Typical Factory Option Wiring

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Resistive Non--Communicating Sensor Wiring

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. Below is the list of the connections of the SPT to the RTU-OPEN, refer to Fig. 3 and 4 for typical connections at the sensor.

S J20-1 = temperature sensor input (SEN) S J20-2 = sensor common S J20-3 = Setpoint adjustment input (SET)

NOTE: See Fig. 5 for space temperature sensor averaging. T55/56 Override button will no longer function when sensors are averaged. Only Sensor 1 T56 STO input can be used.

SEN

SW1

Cool Warm

Fig. 3 -- Space Temperature Sensor

Typical Wiring (33ZCT56SPT)

OR SET SEN

OPB COM- PW R+

BRN (COM)

BLK (STO)

BLU (SPT)

SET

BLK (T56)

BRN (GND) BLU (SPT)

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

SENSOR

WIRING

C07131

Rnet Communicating Sensor Wiring

The Rnet bus allows local communication with the RTU-OPEN, including communicating sensors. The Rnet bus can hold up to 6 devices in the following combinations wired in daisy-chain or hybrid configuration:

S 1-4 SPS sensor(s) S 1 SPPL, SPP, or SPPF sensor S 1-4 SPS sensor(s), and 1 SPPL, SPP, or SPPF sensor S Any of the above combinations, plus up to 2

BACview

NOTE: Additional SPS sensors and BACview

must be

addressed. Use the jumpers on the SPS sensor’s circuit

6’

board and refer to the BACview

s installation instructions

for 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)

CO2Sensor(s) (IAQ and OAQ)

The indoor air quality (IAQ) and outdoor air quality

Sensor

) levels. This

(IAQ) sensor

sensor

(OAQ) sensors monitor carbon dioxide (CO information is used to monitor the quality of air in terms of parts per million (PPM). The same sensor is used for inside, outside, and duct monitoring, except an aspirator box is required for outside and duct mounting. The CO sensor is preset for a range of 0 to 2000 ppm and a linear mA output of 4 to 20. The rooftop unit may have a factory installed CO

sensor on the side of the economizer

assembly in the return air section of the unit and is pre-wired and pre-configured at the factory. For field installed sensors, a field supplied transformer must be used to power the sensor. Refer to the instructions supplied with the CO

sensor for electrical requirements

and terminal locations. RTU-OPEN configurations must be changed after adding a CO 7 for typical CO

sensor wiring.

sensor. See below and Fig.

S J4--2 or J4--5 = 4--20mA signal input S J4--3 or J4--6 = signal common

NOTE: The factory used J4-2&3 for CO inputs.

Combination Temperature and CO

If using a combination temperature and CO (33ZCT55CO2 or 33ZCT56CO2), refer to the installation instructions provided with the sensor.

24 VAC

NOTE: Must use a separate isolated transformer.

Fig. 4 -- Space Temperature Sensor

Typical Wiring (33ZCT59SPT)

POWER WIRING

RED

BLK

RED

BLK

J20

RED

BLK

LEGEND

Factory Wiring

Field Wiring

RED

BLK

RED

BLK

SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4

RED

BLK

SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION

BLK

SENSOR 1

RED

SENSOR 4

RED

BLK

SENSOR 2

RED

BLK

SENSOR 5

RED

BLK

RED

BLK

SENSOR 3

RED

BLK

SENSOR 6

RED

BLK

SENSOR 7

SENSOR 8

SPACE TEMPERATURE AVERAGING — 9 SENSOR APPLICATION

Fig. 5 -- Space Temperature Averaging

24 VAC

24 VDC

SENSOR 9

C07133

0-10VDC

SIG COM (J4-6)

4-20mA (J4-5)

ALARM

NC COM

RELAY

}

CONTACTS

Fig. 6 -- Typical Rnet Communication Sensor Wiring

C07134

Fig. 7 -- Indoor/Outdoor Air Quality (CO2)Sensor

33ZCSENC02) -- Typical Wiring Diagram

C10820

Relative Humidity Sensors (Space or Duct 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. The shield must be removed from the sensor end of the cable and grounded at the unit end. The current loop power for the sensor is provided by the RTU-OPEN controller as 24vdc. Refer to the instructions supplied with the RH sensor for electrical requirements and terminal locations. RTU-OPEN configurations must be changed after adding a RH sensor. See below and Fig. 8 and 9 for typical RH sensor wiring.

S J4--1 or J4--4 = 24vdc loop power S J4--2 or J4--5 = 4--20mA signal input

NOTE: The factory default for dehumidification control is a normally open humidistat.

Installing Discrete Inputs

Compressor Safety

The compressor safety input provides the RTU-OPEN with feedback to when the compressor is not running and should be. This feedback is usually provided by a Compressor Lock-Out (CLO) device. Compressor safety is a dedicated input on the configurable input 3 and tells the RTU-OPEN when the compressor is locked out. The normal condition for compressor safety is good operation. A normally open compressor safety is the factory default for all units. Follow specific accessory instructions if installing a CLO device. The CLO should wire into the unit’s Low Voltage terminal Board (LVTB).

NOTE: Input 3 can also be wired into J--5.

MOUNTING HOLES

Gnd

Vin

SW2

123456

a33-9141

Vin - J4 -1 or J4 -4 24Vdc Io - J4 -2 or J4 -5 4 -20mA output

Fig. 8 -- Space Relative Humidity Sensor Typical Wiring

WIRING OPENING

C07201

Humidistat

The accessory humidistat provides the RTU-OPEN insight to the relative humidity in the space. The humidistat reads the RH level in the space and compares it to its setpoint to operate a dry contact. The humidistat is a dedicated input on the configurable input 9 and tells the RTU-OPEN when the RH level is HIGH or LOW. The normal condition for humidity is LOW. A normally open humidistat is the factory default control for the Humidi-MiZert 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 OR dry bulb temperature is above 75_F) and de-energized when enthalpy is low (below 27 BTU/lb AND dry bulb temperature is below

74.5_F). The enthalpy input is dedicated to input 8 and tells the RTU-OPEN when the outside air enthalpy is HIGH or LOW. The normal condition for the enthalpy input is HIGH. Enthalpy is configured on input 8 in the factory when it is added as an option.

NOTE: The enthalpy calculation is done using an average altitude of 1000 ft above sea level.

For field installation, refer to the enthalpy accessory instructions. For wiring see below and Fig. 10. The RTU-OPEN board provides 24vac on one of the two loose grey wires in the return air section of the rooftop near the 12-pin economizer plug. To determine the correct grey, measure the voltage on the wires with power applied to the unit. If 24-vac is sensed, then that is the grey wire that is connected to the RTU-OPEN board at J2-7. The other is the signal for input 8, connect it to the LOW Enthalpy terminal on the enthalpy switch/receiver. Tie into the 12-pin economizer plug on pin 4 or the black wire connected to the actuator for the enthalpy’s GND connection. Power can also be provided direct from the unit transformer and J5 terminal on the RTU-OPEN.

S J2--7orJ5--2=24VACforenthalpyswitchpower S J2--6 or J5--1 = input signal

Differential Enthalpy

Differential enthalpy control requires both an enthalpy switch/receiver (33CSENTHSW) and an enthalpy sensor (33CSENTSEN). The enthalpy sensor must be installed in the field as the factory can only provide single enthalpy. The enthalpy sensor must be mounted in the return airstream and calculates the enthalpy of the indoor air. The relay is energized when the enthalpy detected by the return air enthalpy sensor is less than the enthalpy at the enthalpy switch/receiver. The relay is de-energized when the enthalpy detected by the return air enthalpy sensor is greater than the enthalpy at the enthalpy switch/receiver (differential enthalpy control).

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

4-20 VAC GND 0-5V mA or or VDC 0-10V

SPAN

Relative Humidity Sensor (Polarized Male Connector)

ZERO

C10839

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. Connect the 24-36 VDC Out terminal on the enthalpy switch/receiver to the 24-36 VDC In terminal on the return air enthalpy sensor. (See Fig 10.)

Fire Shutdown

The fire shutdown input is provided for unit shutdown in response to a fire alarm or smoke detector. The fire shutdown input is dedicated to input 5 and tells the RTU-OPEN when to shutdown due to smoke detection or fire alarm system. The normal condition for fire shutdown is there is no fire alarm. The unit may have factory installed smoke detector(s); refer to the base unit installation instructions for details on any adjustments required during unit installation. Fire shutdown is always factory configured for a normally open smoke detector.

For field installation of a smoke detector see instructions for that specific accessory. See below and the troubleshooting section for wiring at the unit’s Low Voltage Terminal Board (LVTB).

S LVTB -- UNIT SHUTDOWN -- 24v OUT = 24 VAC

source

S LVTB -- UNIT 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 Filter Status. Refer to the configuration section for details on configuring inputs for specific functions and state. Refer to Fig. 1 for wire terminations at J5.

Fan Status

The fan status accessory is a field-installed accessory. This accessory detects when the indoor fan is moving air. 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 Fan Status. Refer to the configuration section for details on configuring inputs for specific functions and state. Refer to Fig. 1 for wire terminations at J5.

Remote Occupancy

The remote occupancy accessory is a field-installed accessory. This accessory provides an input to change the units occupancy status. 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 remote occupancy. Refer to the configuration section for details on configuring inputs for specific functions and state. Refer to Fig. 1 for wire terminations at J5.

Fig. 10 -- Enthalpy Switch and Sensor Wiring

C10821

Communication Wiring--Protocols

General

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU--OPEN can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. 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. Refer to the RTU--OPEN 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

NOTE: Power must be cycled after changing the SW1--3 switch settings.

I--Vu OPEN

I-Vu OPEN is a Carrier front-end and Building Automation System (BAS). It is a web based network system that uses a native BACnet over MS/TP communication protocol. The speed of the network can range from 9600 to 76,800 baud. OPEN devices communicate with a proprietary language called Linkage on I-Vu OPEN. Linkage is established automatically and allows the flow of specific data across OPEN devices. Refer to I-Vu OPEN literature for more information on I-Vu.

BACnet MS/TP

BACnet Master Slave/Token Passing (MS/TP) is used for communicating BACnet over a sub--network of 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.

SW3 Protocol Selection

PROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 BACnet MS/TP

(Master) Modbus

(Slave) N2

(Slave) LonWorks Unused ON ON OFF ON OFF OFF ON

NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown

BAUD RATE DS2 DS1

9600 OFF OFF 19,200 ON OFF 38,400 OFF ON 76,800 ON ON

Unused OFF OFF OFF ON OFF Select Baud Select Baud

Unused OFF OFF ON ON OFF Select Baud Select Baud

Unused OFF OFF OFF ON ON OFF OFF

Baud Rate Selections

Fig. 11 -- RTU--OPEN SW3 Dip Switch Settings

Fig. 12 -- RTU--OPEN Address Switches

C10815

C07166

Modbus

The RTU--OPEN module can speak the Modicon Modbus RTU Protocol as described in the Modicon Modbus Protocol Reference Guide, PI----MBUS----300 Rev. J. 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 the use of Echelon’s Neuron microprocessor to encode and decode the LonWorks packets. In order to reduce the cost of adding that hardware on every module, a separate LonWorks Option Card (LON--OC) was designed to connect to the RTU--OPEN.

This accessory card is needed for LonWorks and has to be ordered and connected using the ribbon cable to plug J15. The RTU--OPEN’s baud rate must be set to 38.4k to communicate with the LON--OC. The address switches (SW1 & SW2) are not used with LonWorks.

Fig. 13 -- Network Wiring

C10816

Fig. 14 -- LON--OC and LON Network Wiring

C10817

Local Access

BACview6Handheld

The BACview 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. You connect the BACview

one of the communicating space sensor’s access port. There are 2 password protected levels in the display (User and Admin). The user password is defaulted to 0000, but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is left idle. See Appendix A for navigation and screen content.

is a keypad/display interface used to

to the RTU--OPEN’s J12 local access port or

Virtual BACview

Virtual BACview is a freeware computer program that

functions as the BACview

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 identical to the handheld.

Field Assistant

Field Assistant is a computer program included with the purchase of the USB Link Tech Kit (USB-TKIT). This is a field Tech Tool to set-up, service, or download the RTU-OPEN controller. The link cable connects a USB port to the J12 local access port. The menu structure is similar to the BACview, but accessed and functions the same as I-Vu.

Fig. 15 -- BACview6Handheld Connections

C07170

START--UP

IMPORTANT: Follow the base unit’s start-up sequence

documented in its specific instructions. Use the base 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.

Besides the base unit start-up, there are a few steps to take to properly start-up the controls. RTU-OPEN’s Service Test function should be used to assist in the base unit start-up and also allows verification of output operation. Controller configuration is also part of start-up. This is especially important when field accessories have been added to the unit. The factory pre-configures options installed at the factory. There may also be additional installation steps or inspection required during the start-up process.

Additional Installation/Inspection

Inspect the field installed accessories for proper installation, making note of which ones do or do not require configuration changes. Inspect the RTU-OPEN’s Alarms for initial insight to any potential issues. See troubleshooting section for alarms. Inspect the SAT sensor for relocation as intended during installation. Inspect special wiring as directed below.

Humidi--MiZert Control Wiring

In units equipped with the optional Humidi-MiZer option there are 2 pink wires loose in the control box used to control the dehumidification function of the unit. These pink wires are meant to be ties to a space humidistat or thermidistat on an electromechanical unit. On RTU-OPEN equipped units these pink wires must be connected to J11-7 & 8 to allow the OPEN board to operate the dehumidification function or the unit. Disconnect the J11 Phoenix style connector form the board and use the plug screws to secure the pink wires in pins 7 and 8, reconnect the plug to the board at J11.

Power Exhaust Relay Power

The relay used by the RTU-OPEN board to control power exhaust is a dry contact which means it does not have 24vac. This 24vac must be connected to the relay to allow it operate the power exhaust relay in the PE accessory. A 24vac source should be provided to the J11-2 pin on the RTU-OPEN. This can be provided by the unit’s transformer from various sources. The “R” terminal on the unit’s low voltage terminal board (LVTB) is a logical source.

Service Test

The Service Test function can be used to verify proper operation of compressors, heating stages, 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

delays are ignored.

S The status of Alarms (except Fire and Safety chain) is

ignored, but all alerts and alarms are still broadcasted on the network.

Service Test can be turned ON/OFF at the unit display or from the network. Once turned ON, other entries may be made with the display or through the network. To turn Service Test on, change the value of Test Mode to ON, to turn Service Test off, change the value of Test Mode to OFF.

NOTE: Service Test mode is password protected when accessing from the display. Depending on the unit model, factory--installed options, and field--installed accessories, some of the Service Test functions may not apply.

Fan Test

This point allows the board’s fan output to be manually turned On (Enable) and Off (Disable). Other test points that require the fan for operation will automatically turn the fan on and this point will still show “Disable.” Fan test can operate simultaneously with other Service Test Points.

Compressor 1 and Compressor 2 Test

The compressor test points are used to change output status for the individual compressors. Compressor starts are not staggered. The fan and heating service test outputs are reset to “Disable” for the compressor service tests. The Indoor fan and outdoor fans are controlled normally to maintain proper unit operation. All normal cooling alarms and alerts are functional.

NOTE: Compressor 1 is always operated with Compressor 2 due to outdoor fan control on Compressor

1. Always test Compressor 1 first, and leave it on to test Compressor 2.

Heat 1 and Heat 2 Test

The heat test points are used to change output status for the individual heat stages, gas or electric. The fans and cooling service test outputs are reset to “Disable” for the heat service tests. Indoor and outdoor fans are controlled normally to maintain proper unit operation. All normal heating alarms and alerts are functional.

Reversing Valve Test

This test point activates the DO7 relay at J11. These rooftop units do not use reversing valve control for heat pumps, therefore this test is not used.

Dehumidification Test

For units with the factory Reheat option, the 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 on and the cooling test (compressor test relays) on puts unit and or individual circuits in subcooling dehumidification mode. The fans and heating service test outputs are reset to “Disable” for the dehumidification service test. Indoor and outdoor fans are controlled normally to maintain proper unit operation. All normal cooling/dehum alarms and alerts are functional.

Power Exhaust Test

This point allows the board’s power exhaust (PE) output to be manually turned On (Enable) and Off (Disable). Power Exhaust test can operate simultaneously with other Service Test Points.

Economizer Test

This point allows the board’s economizer output to be manually controlled from 0 to 100 % Open. Economizer test can operate simultaneously with other Service Test Points.

Analog Output 2 Test

This test point activates the AO2 0-10vdc analog output at J22. These rooftops do not use this output, therefore this test is not used.

NOTE: Service Test Mode does not timeout. Be sure to turn off test mode or cycle power to the RTU to return to normal operation.

Configuration

The RTU-OPEN controller’s configuration points effect the unit’s inputs and operation. Review and understand the meaning and purpose of each configuration point before changing it from the factory default value. Use the RTU-OPEN Start-up Sheet during configuration; fill in changed values if changed from factory default. There are three main configurations menus: SETPOINT, UNIT, and SERVICE. Each configuration point is described below under its according menu. See Appendix A for BACview menu structure.

Setpoint

Occupied Heating Setpoint -- The heating setpoint the

controller maintains during the occupied period.

Range = 40-90_F

Occupied Cooling Setpoint – The cooling setpoint the controller maintains during the occupied period.

Range = 55-99_F

Unoccupied Heating Setpoint – The heating setpoint the controller maintains during the unoccupied period.

Range = 40-90_F

Unoccupied Cooling Setpoint – The cooling setpoint the controller maintains during the unoccupied period.

Range = 55-99_F

Effective Heating Setpoint – The current setpoint value heating operation will control to.

Effective Cooling Setpoint – The current setpoint value cooling operation will control to.

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 will disable optimal start.

Range = 0-4 hours Default = 4 hours

Occ Relative Humidity Setpoint – The space RH setpoint the controller maintains during the occupied period.

Range = 0 to the Unocc RH setpoint Default 60%

Unocc Relative Humidity Setpoint – The space RH setpoint the controller will maintain during the unoccupied period.

Range = 30-100% Default = 90%

DCV Max Ctrl Setpoint – The difference between indoor and outdoor CO ventilation damper position.

Range = 0-9999ppm Default = 650ppm

Power Exhaust Setpoint – When the economizer damper position opens above this point the power exhaust operation will begin. When the damper position falls below this point and 5% lower the power exhaust will shutdown.

Range = 20-90% Default = 50%

NOTE: This point is only used when Continuous Occupied Exhaust = NO

level which results in maximum

Unit

Fan Mode – Sets the operation of the indoor fan when not

in cooling or heating mode. Refer to fan operation for details on each operation.

Range = Auto, Continuous, or Always On Default = Continuous

Unit Start Delay – Refers to the time delay the unit will wait after power up or when transitioning from unoccupied to occupied before it pursues any specific operation.

Range = 0-30 sec Default = 5 sec

Fan Off Delay – Time delay in which the fan will continue run after being commanded off.

Range = 0-180sec Default = 90sec

Minimum Cooling SAT – The supply air temperature must remain above this value to allow cooling with the economizer and/or compressors. There is 5_Fplusand minus deadband to this point. If the SAT falls below this value during cooling a compressor stage will be removed and/or the economizer will return to minimum position.

Range = 45-70_F Default = 50_F

Maximum Heating SAT – The supply air temperature must remain below this value to allow heating. There is 5_F plus and minus deadband to this point. If the SAT falls below this value during heating the heat stages will begin to decrease until the SAT has dropped below this value.

Range = 95-150_F Default = 120_F

Vent Dmpr Pos / DCV Min Pos – Minimum damper 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 – The timer set for the Supply Fan Runtime Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared in the maintenance menu after the maintenance has been completed. The timer will then begin counting its runtime again for the next due maintenance.

NOTE: Default = 0 hours, if set = 0 hr this point is disabled and its alarm will never be generated.

Comp 1 Service Alarm Timer – The timer set for the Compressor 1 Runtime Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared in the maintenance menu after the maintenance has been completed. The timer will then begin counting its runtime again for the next due maintenance.

NOTE: Default = 0 hours, if set = 0 hr this point is disabled and its alarm will never be generated.

Comp 2 Service Alarm Timer – The timer set for the Compressor 2 Runtime Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared in the maintenance menu after the maintenance has been completed. The timer will then begin counting its runtime again for the next due maintenance.

NOTE: Default = 0 hours, if set = 0 hr this point is disabled and its alarm will never be generated.

Filter Service Alarm Timer – The timer set for the Dirty Filter Alarm. After the number of hours set on this point is exceeded the corresponding alarm will be generated, and must be manually cleared in the maintenance menu after the maintenance has been completed. The timer will then begin counting its runtime again for the next due maintenance.

NOTE: Default = 600 hours, if set = 0 hr this point is disabled and its alarm will never be generated.

Pushbutton Override – Set to enable or disable the pushbutton override function of the locally installed space sensor. Default = Enable

Setpoint Adjustment – Set to enable or disable the setpoint adjustment function of the locally installed space sensor. Default = Enable

Setpoint Adjustment Range -- Sets the slider range of a space sensor (with built in function). The slider is used to offset the control setpoint.

Range = +/-0-5n_F Default = 5n_F

Cooling Lockout 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 = 55-80_F Default = 75_F

HP Rev Cycle Lockout Temp – If the outdoor air temperature falls below this value, the compressors will not be allowed to run for heating. Unit Type must be set to Heat pump for this to be active.

Range = -20-30_F Default = -3_F

Heating Lockout Temperature – This defines the maximum outdoor air temperature that heating mode can be enabled and run. If the OAT rises above this number during heating the heat stages will be de-energized.

Range = 35-150_F Default = 65_F

Unocc Free Cool Enable – Set to enable or disable the economizer for night time free cooling (NTFC) operation. Default = Disable

Setpoint Separation – Sets the minimum separation gap in which setpoints can be set.

Range = 2-10_F Default = 5_F

Occupancy Source – Tells the controller which method of occupancy control to use in determining occupancy of the rooftop. Refer to Occupancy in the operation section for detail on each specific operation function.

Range = Always Occupied, BACnet Schedule, BAS On/Off, or Remote Occ Input Default = Always occupied

Inputs

Input 1 Function – This input is an analog input and can

be configured to be one of four different inputs: No Sensor, IAQ Sensor, OAQ Sensor, or Space RH Sensor. Input 1 is wired to pin J4-5. Default = No Sensor

Input 2 Function – This input is an analog input and can be configured to be one of four different inputs: No Sensor, IAQ Sensor, OAQ Sensor, or Space RH Sensor. Input 2 is wired to pin J4-2. Software Default = No Sensor Factory Default = IAQ Sensor with factory installed CO sensor

Input 3 -- This input is a discrete input and can be configured to be one of six different functions: No Function, Compressor Safety, 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 3 is factory wired to pin J1-2. Field accessories can be wired to its parallel pin J5-5. Factory Default = Compressor Safety and N/O

Input 5 -- This input is a discrete input and can be 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. Field accessories can be wired to its parallel pin J5-3. Software Default = Fire Shutdown and N/C Factory Default = Fire Shutdown and N/O

Input 8 -- This input is a discrete input and can be configured to be one of six different functions: No Function, Enthalpy Switch, 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 8 is factory wired to pin J2-6. Field accessories can be wired to its parallel pin J5-1. Software Default = Enthalpy Switch and N/O Factory Default = No Function and N/O without

factory

installed enthalpy sensor Input 9 -- This input is a discrete input and can be

configured to be one of six different functions: No Function, Humidistat, 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 9 is factory and field wired to pin J5-7. Factory Default = Humidistat and N/O

Space Sensor Type – This tells the controller what type of space sensor is installed to run the unit. The three types that can be used are: a standard 10k Type II thermistor (T55), sensor with a setpoint offset slider bar (T56), or a communicating sensor (SPT Sensor).

Range = T55, T56, or SPT Sensor Default = T55

T5x Override Duration – Sets the override time duration the unit will change from unoccupied to occupied when the override button is pushed on the space sensor.

Range = 0-24 hours Default = 1 hour

Service

Unit Type – This tells the control what type of unit it is

controlling. Heat/Cool refers to gas and electric heat units. HP O/B Ctrl refers to a heat pump unit which requires reversing valve control. HP Y1/W1 Ctrl refers to a heat pump unit whose reversing valve is built in to the cooling or heating call.

Factory Default = Heat/Cool for non-heat pump units, or HP Y1/W1 Ctrl for heat pump units.

Compressor Stages – This refers to the number of mechanical cooling stages available on a specific unit. Set this point to “One Stage” if there is one compressor in the specific unit, set to “Two Stage” if there are two compressors in the unit, and set to “None” if economizer cooling 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 Type – Sets the heat pump’s (HP O/B Ctrl type) reversing valve function. O output type refers to a valve that is energized for cooling, and B output type refers to a valve that is energized for heating.

Default = O output type

Heat Type – Tells the controller which type of heat the unit is capable of. Electric is any unit without gas and a Gas unit is one which requires gas input for heating.

Factory Default = Electric for cooling only units and heat pumps, or Gas for gas units.

Number of Heat Stages – Tells the controller how many heat stages outputs are available for use. See configuration in Appendix A for details on specific unit configuration.

Factory Default = 1 for single heat stage units, 2 for duel stage units, or 0 for cooling only units.

Continuous Occupied Exhaust – This point tells the controller when to run the power exhaust if equipped on the unit. If set to YES, the power exhaust will be on all the time when in occupied mode and will be off when in unoccupied mode. If set to NO the power exhaust will be controlled by the Power Exhaust Setpoint.

Default = NO

Indoor CO

value when the board reads 4 mA at input 1 or 2.

Sensor Value @ Min mA – Sets the indoor

Default 0 ppm

Indoor CO

value when the board reads 20 mA at input 1 or 2.

Sensor Value @ Max mA – Sets the indoor

Default 2000 ppm

Outdoor CO

outdoor CO

Sensor Value @ Min mA –Setsthe

value when the board reads 4 mA at input 1

or 2.

Default 0 ppm

Outdoor CO

outdoor CO

Sensor Value @ Max mA –Setsthe

value when the board reads 20 mA at input 1

or 2.

Default 2000 ppm

NOTE: The indoor and outdoor min and max mA setting are used to set the linear curve of mA vs. PPM.

Clockset

This submenu screen allows you to set the date and time manually. The Daylight Savings Time (DST) can also be changed here. The date and time is automatically set whenever software is downloaded. The clock is a 24 hour clock and not am/pm. The time should be verified (and maybe changed) according to unit location and time zone.

Factory Default = Eastern Standard Time

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 and heating outputs based on its space temperature input and setpoints. It can also be controlled by a building control system or zoning system. An optional CO sensor mounted in the space can influence the economizer minimum position. The RTU-OPEN has a hardware clock that can allow scheduling for stand-alone operation. The RTU-OPEN’s default is to control to occupied setpoints all the time, until a type of occupancy control is set. The following sections describe the operation for the functions of the RTU-OPEN.

Occupancy

Occupancy is the fundamental overall control of equipment. The unit can be in one of two states: Occupied or Unoccupied. These are usually referred to as periods because they represent periods of any given day. Before RTU-OPEN can operate specific functions of the equipment it is installed on, occupancy must be determined. There are four different ways RTU-OPEN can determine occupancy. These are described below and selected by the configuration point Occupancy Source.

Always Occupied (Default)

The unit will not determine occupancy and continuously run in the occupied state or period. RTU-OPEN ships from the factory with this setting to allow immediate operation.

BACnet Schedule

When Occupancy Source is set to BACnet Schedule, RTU-OPEN will use a schedule to change occupancy based upon a day of week and a time period. Local time and date should be set in the RTU-OPEN for this function to operate properly. This function applies if setting a local schedule in the RTU-OPEN or if applying the unit to an I-Vu Open network or an OPEN zoning system. An OPEN network schedule can override a local schedule within the unit. A space sensor push button override is only available when running a local or OPEN schedule. The push button will override an unoccupied period to occupied for the specified time duration.

IAQ

BAS On/Off

When Occupancy 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 Remote Occ Input, RTU-OPEN follows occupancy based on the remote occupancy switch input. Inputs 3, 5, 8, and 9 on plug J5 can be hard-wired to command the unit’s occupancy. The Occupancy Contact point show the status as on or off, on is occupied and off is unoccupied.

Indoor (Supply) Fan

The indoor fan can be configured to operate in three different manors. The configuration point Fan Mode determines how the fan will run. The fan will always be disabled if a fire shutdown or safety chain alarm is active. A valid space temperature and supply air temperature must be available for the fan to operate. There is a unit start delay in effect when the unit is transitioning from unoccupied to occupied. The following describes specific fan operation based on the Fan Mode configuration value.

Auto

When Fan Mode is set to Auto, RTU-OPEN will cycle the fan on and off based on the demand for heating, cooling, and dehumidification. There is a configurable fan off delay that is upheld before shutting the fan off after conditioning has ended.

Continuous

When Fan Mode is set to Continuous, RTU-OPEN will cycle the fan based on occupancy. The fan will run the whole occupied period and operate in the auto mode during the unoccupied period.

Always On

When Fan Mode is set to Always On, RTU-OPEN will run the fan all the time regardless of occupancy or demand.

The RTU-OPEN has an optional Supply Fan Status input to provide proof of airflow. If this is enabled, the point will look for a contact change whenever the Supply Fan Relay is on. If it is not enabled then it will always be the same state as the Supply Fan Relay. The cooling, economizer, heating, dehumidification, CO exhaust routines will use this input point for fan status.

and power

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. The economizer, if available, will be used for cooling in addition to the compressors. The following conditions must be true in order for this algorithm to run:

S Indoor Fan has been ON for at least 30 seconds. S Heat mode is not active and the time guard between

modes equals zero.

S If occupied and the SPT > (occupied cool setpoint plus

the T56 slider offset).

S Space Temperature and supply air temperature values

are available.

S If it is unoccupied and the SPT > (unoccupied cool

setpoint plus the T56 slider offset). The indoor fan will be turned on by the staging algorithm.

S If economizer is available and active and economizer

open > 85% and SAT > (SAT low limit + 5_F) and SPT > effective set point + 0.5_F.

Economizer is available, but not active

Economizer is not available

S OAT > DX Lockout temperature

If all of the above conditions are met, the controller uses a PID logic loop to energize or de--energize compressors to satisfy the cooling demand.

There is a fixed 3--minute minimum on time and a 5--minute off time for each compressor output and a 3--minute minimum time delay between staging up or down.

Any time the compressors are running the RTU--OPEN will stage down the compressors if the SAT becomes less than the cooling low supply air setpoint. After a compressor is staged off, it may be started again after a normal time--guard period and the supply air temperature has increased above the low supply air setpoint.

Economizer

The Economizer dampers are used to provide free cooling and Indoor Air Quality, if optional CO when the outside conditions are suitable.

sensor is installed,

The following conditions must be true for economizer operation:

S Indoor Fan has been on for at least 30 seconds. S Enthalpy is Low if the Enthalpy input is enabled. S SAT reading is available. S OAT reading is available. S SPT reading is available. S OAT <= High OAT economizer lockout configuration

(default = 75).

S OAT <= SPT

If any of the mentioned conditions are not true, the economizer will be set to its configured minimum position. The minimum damper position can be overridden by the IAQ routine described later in this section.

If the above conditions are true, the Economizer control will calculate a damper position starting with a minimum vent position and based on current space temperature and a setpoint that is halfway between the effective cool and heat setpoints. If the SAT drops below the cooling low supply air setpoint (+ 5_F), the economizer will ramp down to minimum position.

Power Exhaust

If RTU--OPEN is also controlling an exhaust fan, it can be enabled based on damper position or by occupancy. If configured for continuous occupied operation, it will be energized whenever the controller is in the occupied mode and disabled when in the unoccupied mode. If configured for damper position control, it will be energized whenever the economizer exceeds the power exhaust setpoint and disabled when the economizer drops below the setpoint by a fixed hysteresis of 10%.

Heating

The heat outputs are controlled by the Heating Control PID Loop and Heating Stages Capacity algorithm. They will be used to calculate the desired number of stages needed to satisfy the space by comparing the SPT to the Occupied Heat Setpoint the T56 slider offset when occupied and the Unoccupied Heat Setpoint plus the T56 slider offset if unoccupied. The following conditions must be true in order for this algorithm to run:

S Indoor Fan has been ON for at least 30 seconds. S Cool mode is not active and the time guard between

modes equals zero.

S If occupied and SPT <(occupied heat setpoint plus T56

slider offset)

S SPT and supply air temperature values are available S If it is unoccupied and the SPT < (unoccupied heat

setpoint plus T56 slider offset). The indoor fan will be turned on by the staging algorithm.

S OAT < High OAT lockout temperature.

If all of the above conditions are met, the controller uses a 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. 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 delay.

Heat pump operation is the same as above except for what is explained below. There is a fixed 3 minute on and 5 minute off time for the first heat stage output, and a one minute on and one minute off time for the second heat stage output. There is a 10 minute minimum stage up delay if the heat demand is <= 3_F, and a 2 minute minimum stage up delay if heat demand is > 3_F. T he stage down delay is still 30 seconds. If the Compressor Safety Alarm is active, the second heat stage will come on with the first stage with no delay.

Indoor Air Quality

If the optional indoor air quality sensor is installed, the RTU--OPEN will maintain indoor air quality within the space at the user configured differential set point. The set point is the difference between the indoor air quality and an optional outdoor air quality sensor. If the outdoor air quality is not present then a fixed value of 400ppm is used. The following conditions must be true in order for this algorithm to run:

S The mode is occupied. S Indoor Fan has been ON for at least 30 seconds. S Indoor Air Quality sensor has a valid reading.

As air quality within the space changes, the minimum position of the economizer damper will be changed thus allowing more or less outdoor air into the space depending on the relationship of the indoor air quality to the differential setpoint. If all the above conditions are true, the IAQ algorithm will run and calculates an IAQ minimum position value using a PID loop. The IAQ minimum damper position is then compared against the user configured economizer minimum position and the greatest value becomes the final minimum damper position of the economizer output.

If the calculated IAQ minimum position is greater than the DCV Max Vent Damper Pos configuration, then it will be clamped to the configured value.

Dehumidification

The RTU--OPEN will provide occupied and unoccupied dehumidification only on units that are equipped with the Humidi--MiZert option from the factory. This function requires a space relative humidity sensor or a humidistat for control. The space relative humidity senor can be installed and configured as one of the two analog input channels (inputs 1 or 2 on J4), or a humidistat can be installed and configured as switch input 9 on J5. When using a relative humidity sensor to control dehumidification, occupied or unoccupied dehumidification setpoints are use accordingly. When using a humidistat, setpoints are not used and the dehumidification call comes when the humidistat indicates high humidity.

When the indoor relative humidity becomes greater then the dehumidification setpoint (or switches from low to high), a dehumidification demand will acknowledged. Compressor state is monitored and time guards are honored. If a compressor was just turned off prior to the dehum call the dehumidification output will be delayed the 5 minute minimum off time of the compressor. When ok to dehumidify, the dehumidification output (J11--7, 8) will be energized. This will bring on the supply fan, all compressors, and the dehumidification relay placing the unit in Hot Gas Reheat dehumidification mode. If dehumidification is called for during cooling or cooling is called for during dehumidification, the unit will run in Subcooling dehumidification mode. Individual unit circuits can be in different dehumidification modes based on the demand. Refer to the base units operation for additional information.

NOTE: There is a fixed 5% hysteresis that the indoor relative humidity must drop below the active setpoint to end the dehumidification mode and de--energize the dehumidification output. The output will also de--energize if the fan relay is de--energized.

Demand Limit

If the RTU--OPEN receives a level 1 (one degree offset), 2 (two degree offset), or a 3 (4 degree offset) to the BACnet demand limit variable, the controller will outwardly expand the heating and cooling setpoints by the configured demand limit setpoint value and remain in effect until the BACnet demand limit variable receives a 0 value.

Unoccupied Free Cooling

When the unit is equipped with an economizer, the control can run a night time free cooling (NTFC) mode called Unocc Free Cooling. In this mode the damper is utilized to bring in outdoor air for free cooling during unoccupied periods. The following conditions must be true for unoccupied free cooling to operate:

S Unocc Free Cool Enable set to Enable S The system is unoccupied S The outside air temperature is below the Economizer

High OAT Lockout Temp

S The outside air temperature is less than the space

temperature

S Enthalpy (if enabled) is Low

When the RTU--OPEN schedule is unoccupied and the space temperature rises at least 1 degree above the Occupied Cooling Setpoint, the supply fan starts. The economizer damper opens as necessary to cool the space. The RTU--OPEN continues to operate in this mode until the space is satisfied or the outside air conditions are no longer suitable for free cooling.

Optimal Start

The RTU--OPEN may utilize Optimal Start, which adjusts the effective setpoints to achieve the occupied setpoints by the time scheduled occupancy begins. 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 be set

greater than zero and less than or equal to four (0 disables Optimal Start.)

S The system is unoccupied S The RTU--OPEN has a valid outside air temperature S The RTU--OPEN is running occupancy based on a

schedule, were next time occupied is known.

Fire Shutdown

Fire Shutdown may be configured on Binary Input 5. A typical application involves a smoke detector or fire shutdown contact, which, when active, immediately shuts down equipment operation.

Compressor Safety

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. When configured for Heat Pump, and in the heating mode, a compressor safety fault will cause the available stages of electric heating to be enabled in place of mechanical heating. Normal operation resumes when the compressor safety circuit is de--energized.

Fan Status

Fan Status may be configured on any unused binary input channel. A typical application would be an airflow switch, current sensing relay, or other device that provides a supply fan running verification. Enabling this function displays the supply fan’s status on the equipment graphic. If the controller loses fan status during operation, heating and cooling are disabled, the economizer damper (if available) is closed, and an alarm for loss of status is indicated. If the fan status is on when the controller is commanding the fan off, the unit remains in the off state. An alarm is generated indicating that the fan is running when it should be off.

Filter Status

Filter status may be configured on any unused binary input channel. A typical application is a differential pressure switch that senses the pressure drop across a filter bank. When the pressure across the filter bank exceeds the setpoint of the differential pressure switch, the Filter status is displayed as Dirty on the controller graphic. An alarm indicates a dirty filter.

Door Switch

A Door Contact may be configured on any unused binary input. A typical application is an occupancy sensor mounted within the space served by a single zone rooftop. Door Contact disables mechanical cooling and electric or gas heating, when active. Economizer cooling, if available, continues to operate.

Linkage

The RTU--OPEN may serve as an air source to an OPEN Variable Volume Terminal (VVT) system. When the RTU--OPEN is part of a VVT system and the controllers are wired together to form a network, the controllers may use a method of communication known as Linkaget. Linkage is a method by which an air source and its subordinate zone terminals exchange data to form a coordinated HVAC system. The system’s air source controller, zone controllers, and bypass controller are linked so that their data exchange can be managed by one zone controller configured as the VVT Master. The VVT Master gathers the following information from the slave zone controllers:

S occupancy status S setpoints S zone temperature S relative humidity

level

S CO

S damper position S optimal start data

The VVT Master performs mathematical calculations and algorithms on the data and then sends the composite information to the air source. The VVT Master receives information from the air source such as mode, supply air temperature, and outside air temperature, and passes that information to all linked controllers.

Linkage Air Source Modes

In a linked system, the air source determines its operating mode and qualifies that mode based on its own Supply Air Temperature (SAT). The following modes can be sent by the air source depending on its configuration:

S Off – Air source fan is off S Fan Only – Air source fan is on and providing

ventilation (neutral SAT) without heating or cooling

S Economizer Cooling – Air source fan is on and

providing cooling, using economizer only

S Cooling – Air source fan is on and cooling is provided

by economizer and mechanical cooling

S Heating – Air source fan is on and heating is provided

(gas or electric)

S Dehumidification – Air source fan is on and

Humidi--MiZer] is active

S Test – The RTU Open Service Test mode is active S Shutdown – Air source fan is off due to Safety Chain,

Fire Shutdown, or invalid SAT sensor

S Unocc Free Cooling – Air source fan is on, with the

economizer providing cooling while unoccupied

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. The three parts to the system are the rooftop unit, the OPEN controller, and the network connected. Determining which part needs to be troubleshot is the first step.

The OPEN controller can be used to troubleshoot the rooftop unit and/or itself with service test, communicating LED’s, and built in alarms. Disconnecting the RTU--OPEN from the network may also help troubleshooting the controller and rooftop unit. Third Party Network troubleshooting may also be required. For base unit troubleshooting, refer to specific base unit Service Maintenance manual.

There is an on--board battery that is used for RAM and clock back--up. It is a 3--volt lithium battery (CR2032). The average life is 7 years with a minimum of 10,000 hours of back--up. When the RTU--OPEN board is powered up, the battery is not being used. If power is lost, the battery backs up the time clock. Battery replacement should be done with the board powered up.

Thermistor Troubleshooting

RTU-OPEN uses thermistors to sense temperatures for control operation of the unit. Resistances at various temperatures are listed in Table 2. Thermistor pin connections are shown in Table 1. Thermistors are used for supply air temperature (SAT), outdoor air temperature (OAT), and space temperature (SPT) and all must be a 10 kilo-ohm type II sensor.

To check accuracy, 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 be close, within 5_F if care was taken in applying thermocouple and taking readings. If a sensor must be corrected, use the RTU-OPEN’s calibration function to offset the temperature reading.

Table 2 – Thermistor Resistance vs Temperature

Values for Space Temperature Sensor, Supply Air

Temperature Sensor, and Outdoor Air Temperature

Sensor

TEMP

(C)

--- 40 --- 4 0 335,651

--- 35 --- 3 1 242,195

--- 30 --- 2 2 176,683

--- 25 --- 1 3 130,243

--- 20 --- 4 96,974

--- 15 5 72,895

--- 10 14 55,298

--- 5 23 42,315 0 32 32,651 5 41 25,395

10 50 19,903 15 59 15,714 20 68 12,494 25 77 10,000 30 86 8,056 35 95 6,530 40 104 5,325 45 113 4,367 50 122 3,601 55 131 2,985 60 140 2,487 65 149 2,082 70 158 1,752

TEMP

(F)

RESISTANCE

(Ohms)

Software Version

During Start-up and throughout the life of the equipment, it may be necessary to obtain the RTU-OPEN’s software version. To do this a Modstat must be run on the controller. This can be done from the BACview user interface by holding the function (FN) key and pressing the period (.) key. An example of the beginning lines of a Modstat is shown in Fig. 16. The application software version shows the current running software of the board. In this case the rtu_open-20100409 refers to RTU-OPEN software version 20100409. This 8 digit number refers to a date (YYYYMMDD). The first 4 digits are the year (2010) and the month and day (0409), so this version is

April 9

2010.

C10825

Fig. 16 -- Example Modstat

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.

Table 3 – LED’s

The LED’s on the RTU--OPEN show the status of certain functions

If this LED is on... Status is...

Power The RTU --- OPEN has power

Rx The RTU --- OPEN is receiving data from the network segment

Tx The RTU---OPEN is transmitting data over the network segment

DO# The digital output is active

The Run and Error LED’s indicate control module 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 3flashes,thenoff Control module has just been formatted

2 flashes per second 4 flashes, then pause Two or more devices on this network have the same

2 flashes per second On Exec halted after frequent system errors or control pro-

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

14 flashes per second 14 flashes per second, alternating with

Run LED

On On Failure. Try the following solutions:

ARC156 network address

grams halted

Ten second recovery period after brownout

Brownout

--- T u r n t h e R T U --- O P E N o f f , t h e n o n .

--- F o r m a t t h e R T U --- O P E N .

--- D o w n l o a d m e m o r y t o t h e R T U --- O P E N .

--- R e p l a c e t h e R T U --- O P E N .

Table 4 – RTU--OPEN Alarms

POINT NAME

Safety Chain safety_alarm Immediate Shutdown Automatic

Fire Shutdown fire_alarm Immediate Shutdown Automatic

Supply Fan Failure sfan_fail_alarm

Supply Fan in Hand sfan_hand_alarm Ramp down Operations Automatic

Compressor Safety comp_alarm Alert Generated Automatic Compressor would not start

Space Temp Sensor spt_fail Ramp down Operations Automatic

Supply Air Temp Sensor

Outdoor Air Temp Sensor Alarm

Space Relative Humidity Sensor

IAQ Sensor iaq_alarm No IAQ Operation Automatic

OAQ Sensor oaq_alarm Set OAQ to 400 Automatic

Space Temperature spt_alrm_status Alert Gen erated Automatic

Alarming

Tem p e r at u r e

Alarm Limit

Exceeded High Supply Air Tem p e r at u r e Low Supply Air Tem p e r at u r e

Setpoint Slider slidepot_alarm Set Offset to zero Automatic

Switch Configuration di_cfg_alarm

Analog Input Configuration

High Space Relative Humidity Low Space Relative Humidity

High CO2 co2_alarm Alert Generated Automatic

Supply Fan Runtime sfan_rntm_alarm Alert Generated zero the timer

Compressor 1 Runtime

Compressor 2 Runtime

Filter filter_alarm Alert Generated

Airside Linkage Alarm air_linkage_fail Alert Generated Automatic Linkage communication failed

BACnet Object

NAME

sat_alarm Economizer Disabled Automatic

oat_alarm

sprh_alarm Dehumidification disabled Automatic

spt_alrm_temp

spt_alrm_lmt

sat_hi_alarm Alert Generated Automatic

sat_lo_alarm Alert Generated Automatic

ai_cfg_alarm

sprh_hi_alarm Alert Generated Automatic

sprh_lo_alarm Alert Generated Automatic

comp1_rntm_alar m comp2_rntm_alar m

ACTION TAKEN BY

CONTROL

Immediately disable Operation

Economizer and Low ambient DX cooling lockout disabled.

Shows temperature that caused alarm Shows the limit that was exceeded

Disable only wrong switch functions

Disable 4 selectable analog inputs

Alert Generated zero the timer

RESET METHOD PROBABLE CAUSE

Automatic

N/A N/A

Configure correctly

Automatic / reset timer

Over load Indoor Fan or Electric Heater overheat Smoke detected by smoke detector or configuration incorrect Tripped Circuit Breaker, Broken belt, Bad indoor fan motor, Configuration incorrect, Bad fan status switch. Bad Fan Status Switch, Configuration incorrect.

Faulty, shorted, or open thermistor caused by wiring error or loose connection. Faulty, shorted, or open thermistor caused by wiring error or loose connection. Faulty, shorted, or open thermistor caused by wiring error or loose connection. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. Space value is less then the low allowed value or Space value is greater then the high allowed value

SAT is greater then the configuration for more then 5 minutes SAT is less then the configuration for more then 5 minutes STO sensor is open for more then 5seconds More then one discrete input is configured to provide the same function. More then one analog input is configured to provide the same function. IRH is greater then the configuration for more then 15 minutes IRH is less then the configuration for more then 5 minutes CO2 reading is above the configuration for 1 minute Supply fan run time exceeded user defined limit Compressor run time limit is exceeded Compressor run time limit is exceeded DirtyFilter,supplyfanruntimeexceeded, filter switch configuration wrong.

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.

Safety Chain Alarm

This alarm occurs immediately if the supply-fan internal overload trips or if an electric-heat limit switch trips. The Unit Status will be Shutdown and the System Mode will be Disable. All unit operations stop immediately and will not restart until the alarm automatically clears. There are no configurations for this alarm; it is all based on internal wiring. This alarm will not occur if Fire Shutdown Alarm is active. Normal operation resumes when the safety chain circuit is complete.

Fire Shutdown Alarm

This alarm occurs immediately when the smoke detector senses smoke. The Unit Status will be Shutdown and the System Mode will be Disable. All unit operations stop immediately and will not restart until the alarm automatically clears. If there is not a smoke detector installed or the smoke detector did not trip, check input configurations. NOTE: The default function for input 5 is a normally open Fire Shutdown input.

Supply Fan Failure

This alarm occurs when the indoor fan is being command on and the fan status switch feedback is showing the fan off. This will end current operating mode and disable unit operation. This alarm requires a fan status switch to be configured on one of the inputs.

Supply Fan in Hand

This alarm occurs when the indoor fan is being commanded off and the fan status switch feedback is showing the fan is on. This will prevent any operating mode and disable unit operation. This alarm requires a fan status switch to be configured on one of the inputs.

Compressor Safety

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 in the heating mode, it will automatically replace the compressor stage(s) with the equivalent number of auxiliary heat stages, as available.

For Heat Pump’s with O/B, when configured for two stages of aux heat and two compressors, Compressor 1 is replaced by Aux Heat Stage 1 and Compressor 2 is replaced 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 connection, and configurations should be checked for faults or errors. Alarm will reset automatically when cause is fixed.

Supply Air Temp Sensor

This alarm occurs immediately when the supply air temperature sensor wired to the RTU-OPEN is disconnected or shorted. When this occurs the Unit Status will be Shutdown and the System Mode will be Run. Sensor, sensor connections, wiring, board connection, and configurations should be checked for faults or errors. Alarm will reset automatically when cause is fixed.

Outdoor Air Temp Sensor Alarm

This alarm indicates a shorted or open circuit in the OAT input. Cooling, heating, and supply fan operation continues. OAT lockouts will not operate while the sensor is in alarm. Economizer cooling and optimal start functions are disabled. Normal operation resumes when the controller detects a valid sensor.

Space Relative Humidity Sensor

This alarm indicates the mA input at the associated channel falls below 3.5 mA or rises above 21 mA. Cooling, heating, and supply fan operation continues, however, the controller’s Humidi-MiZert binary output is disabled until the fault condition is corrected.

IAQ Sensor

This alarm indicates the mA input at the associated channel falls below 3.5 mA or rises above 21 mA. Cooling, heating, and supply fan operation continues. However, the controller’s IAQ control function is disabled until the fault condition is corrected.

OAQ Sensor

This alarm indicates the mA input at the associated channel falls below 3.5 mA or rises above 21 mA. Cooling, heating, and supply fan operation continues. However, the controller’s IAQ control function uses 400ppm as the fixed outdoor air CO2 level until the fault condition is corrected.

Space Temperature

When Occupied, a Low Space Temperature alarm is generated if the space temperature falls below the lower limit or a High Space Temperature alarm is generated if the space temperature rises above the upper limit. When Unoccupied, an unoccupied low space temperature alarm is generated when the space temperature falls below the alarm configuration Unoccupied Low SPT Alarm Limit or an unoccupied high space temperature alarm is generated when the space temperature rises above the alarm configuration Unoccupied High SPT Alarm Limit.

The following values are related to the Space Temperature 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.

High Supply Air Temperature

This alarm indicates the supply air temperature exceeds the alarm configuration High SAT Alarm Limit for 5 minutes. This alarm is inhibited until the RTU has been running for 30 minutes to allow for system stabilization after startup.

Low Supply Air Temperature

This alarm indicates the supply air temperature falls below the alarm configuration Low SAT Alarm Limit for 5 minutes. This alarm is inhibited until the RTU has been running for 30 minutes to allow for system stabilization after startup.

Setpoint Slider

This alarm indicates an open circuit is detected at the setpoint adjustment input. This can only occur if the Space Sensor Type is set to T56. Note that only an open circuit results in an alarm. A short across this input offsets the setpoints negatively by the amount configured by configuration Setpoint Adjustment Range.

Switch Configuration

This occurs if more than one binary input (inputs 3, 5, 8, and 9) is configured for the same function. When this happens the two inputs (or more) configured wrong will be disabled as an inputs. This alarm will automatically be cleared when configuration is corrected. An example of this would be: Input 3 = Compressor Safety, input 5 = Fan Status, input 8 = Fan Status, and input 9 = Humidistat; the alarm would be active, unit would run, compressor safety and humidistat would function normally, and Fan Status (inputs 5 & 8) will be interpreted as “No Function.”

Analog Input Configuration

This occurs if more than one analog input (inputs 1 & 2) is configured for the same sensor. When this happens the two inputs will be disabled as inputs. This alarm will automatically be cleared when configuration is corrected. An example of this would be: Input 1 = IAQ Sensor, input 2 = IAQ Sensor; the alarm would be active, unit would run, but the IAQ Sensor (inputs 1 & 2) will be interpreted as “No Function.”

High Space Relative Humidity

This alarm indicates the space humidity exceeds the alarm configuration High Space Humidity Alarm Limit for 10 minutes. This alarm is inhibited until the RTU runs for 15 minutes to allow for system stabilization after startup.

Low Space Relative Humidity

This alarm indicates 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 CO

This alarm indicates the space CO2level exceeds the alarm configuration Occupied High CO 1-minute. This alarm will be inhibited until the RTU has been running for 2-minutes to allow for system stabilization after startup.

Alarm Limit for

Supply Fan Runtime

This alarm indicates the accumulated runtime exceeds the unit configuration Supply Fan Service Alarm Timer value (when not set to 0). This alarm is most commonly used to indicate an equipment maintenance interval is due. The supply fan runtime accumulator may be reset by setting the maintenance point Reset Supply Fan Runtime Alarm to Clear, and then back to Run – acknowledging each selection by clicking the OK button when it appears. Setting unit configuration Supply Fan Service Timer value to 0 disables the supply fan runtime alarm function.

Compressor 1 Runtime

This alarm indicates 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 setting the maintenance point Reset Comp 1 Runtime Alarm to Clear, and then back to Run – acknowledging each selection by clicking the OK button when it appears. Setting unit configuration Compressor 1 Service Timer value to 0 disables the Compressor 1 Runtime alarm function.

Compressor 2 Runtime

This alarm indicates the accumulated runtime exceeds the unit configuration Compressor 2 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 2 runtime accumulator may be reset by setting the maintenance point Reset Comp 2 Runtime Alarm to Clear, and then back to Run – acknowledging each selection by clicking the OK button when it appears. Setting unit configuration Compressor 2 Service Timer value to 0 disables the Compressor 2 runtime alarm function. Note that this function is unavailable if the service configuration Compressor Stages value is not set to Two Stages.

Filter

This alarm indicates the accumulated runtime exceeds the unit configuration Filter Service Alarm Timer value (when not set to 0). This alarm is most commonly used to indicate a filter replacement is due. Reset the filter service runtime accumulator by setting the maintenance point Reset Filter Runtime Alarm to On, back to Off, and clicking the OK button after each setting. Setting unit configuration Filter Service Alarm Timer value to 0 disables the filter service alarm function.

Airside Linkage Alarm

This alarm indicates that RTU-OPEN was connected to a zoned system called Linkaget and it lost communications with its linkage master or if it receives invalid data.

Table 5 – Manufacture Date

When troubleshooting, you may need to know a control module’s manufacture date.

Third Party Networking

Third party communication and networking troubleshooting should be done by or with assistance from the front end 3rd party technician. A Module Status Report (Modstat) can be run from the BACview6 or Virtual BACview (see Table 5 to perform). This lists information about the board status and networking state. For basic troubleshooting, see Table 6. Refer to the RTU--OPEN 3rd Party Integration Guide for additional information.

Obtain the manufacture date from a...

Module status report (modstat) To obtain a modstat with BACview6:

Sticker on the control board “Serial No: ORTYMxxxxN” (Bar Coded & Typed Number)

Notes

1. Press Function (FN) key and hold.

2. Then press period (.)

3. Release both buttons. ThereportshowsthedateunderMain board hardware.

The serial numbers are unique and contain embedded information:

“ORT” --- These first three digits are unique to RTU-- -OPEN and 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.

Table 6 – Basic Protocol Troubleshooting

Problem Possible cause Corrective action

No communication with 3rd party vendor

Incorrect settings on SW1, SW2 and SW3 Verify and correct switch settings. Cycle

RS485 Port has no voltage output Verify RTU--- OPEN has correct power

(check with RTU --- OPEN disconnected from RS485 communication bus):

• Bacnet @ 9600/19.2K --- .01 to .045vdc Check RS485 bus f or external voltage

• Bacnet @ 38.4K --- .06 to .09vdc

• Bacnet @ 76.8K --- .1vdc

• Modbus @ 9600 --- 76.8K --- .124vdc

• N2 @ 9600 --- .124vdc

Verify devices are daisy chained and repeaters and bias terminators are correctly installed.

powertoRTU---OPENafterchanging switch settings.

supply.

Possible bad driver on board.

before reconnecting to the bus.

Check 3rd party vendor RS485 communication wiring guidelines and troubleshooting procedures.

APPENDIX A -- USER INTERFACE MENUS

Properties

Equipment

Field Assistant Navigation

Status

Configuration

Unit Configuration

Setpoints

Alarm Configuration

Service Configuration

Maintenance

Alarms

Linkage

BACview Navigation

STANDBY

HOME

SYSTEM

STAT US MAINT ALARM

SETTINGS

BACnet LINKAGE SETPOINT Alarm Keypad Sched

UserPw Weekly schedule Network Exceptions Cloc kSet ALAR MS

DST LINKAGE

TimeMstr UNIT

Clockset SETPOINT

SERVICE

CONFIG

CALIBRATE INPUT

SETPOINT Sched

LINKAGE TEST

Modstat screen only reached by (FN + .)

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Standby BACview Screen and Login Screen

BACview MENU POINT NAME BACnet OBJECT VALUE

STANDBY R T U --- O P E N

1=Off 2=Fan Only 3=Economizer 4=Cooling 5=Heating 6=Dehumidification 7=Test 8=Shutdown

9=Unocc Free Cooling Operating Mode run_status Space Temperature space_temp xxx ° F

Press any key to activate

HOME Select function below

Password user: 0000 Admin:1111

System Settings Menu

BACview MENU POINT NAME BACnet OBJECT RANGE DEFAULT

HOME Select function below

SYSTEM SETTINGS SYSTEM SETTINGS

BACnet Device Instance: xxxxxxx 1610100

BACnet

Keypad

UserPw

Network

ClockSet

DST

TimeMstr

Base BACnet Device ID: xxxxxxx 1610100 Autogenerate Device ID? Y/N Y

Keypad Configuration Inactivity Timeout: 1 --- 2 5 5 m i n u t e s 10 BACnet Write Priority: 0 --- 1 6 0 View/Set User Password: xxxx 0000

NETWORK Max Masters this_device/64 1 --- 1 2 7 127 Max Info Frames this_device/63 1 --- 9 9 9 10 APDU Timeout (ms) this_device/11 1 --- 10000 3000 APDU Retries this_device/73 1 --- 1 0 3 MS/TP Baud Rate this_device/4161(1) 9600---76800 76800

Set Current Time/Date (24 hr clock) Time (hh:mm:ss): D a t e ( d d --- m m m --- y y ) :

DST Start Time: Amount: Entry # B e g ( m m --- d d --- y y ) E n d ( m m --- d d --- y y )

BACnet Time Master

No Broadcast

Time Sync Mode

Time Sync Interval 1--- 9999 minutes 5

Local Broadcast Global Broadcast

(NTFC)

No Broadcast

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Status Menus

BACview MENU POINT NAME BACnet OBJECT RANGE

HOME Select function below Properties/Equipment

STATUS STATUS Status

System Mode mode_status

Operating Mode run_status

Supply Fan Status sfan_status Off/Running Space Temperature --- Prime Vari-

able Supply Air Temperature sa_temp xxx ° F Outdoor Air Temperature oa_temp xxx ° F Space Relative Humidity space_rh 0 --- 1 0 0 % Indoor Air CO2 iaq 0 --- 5000 ppm Outdoor Air CO2 oaq 0--- 5000 ppm Economizer Output econ_output 0 --- 1 0 0 % o p e n

LINKAGE AIR LINKAGE Linkage

Airside Linkage Status a_link_status Not Active/Active Number of Providers link_collector/4602 xx Occupancy Status link_occ Unoccupied/Occupied Space Temperature link_spt xxx ° F Occupied Cooling Setpoint link_occ_cl_stpt 55--- 80 ° F Occupied Heating Setpoint link_occ_ht_stpt 55--- 80 ° F Unoccupied Cooling Setpoint link_unocc_cl_stpt 75--- 130 ° F Unoccupied Heating Setpoint link_unocc_ht_stpt 55--- 85 ° F Indoor Air CO2 (ppm) link_iaq xxxx ppm Space Relative Humidity link_sprh xxx %

space_temp xxx ° F

1=Disabled 2=Test 3=Run

1=Off 2=Fan Only 3=Economizer 4=Cooling 5=Heating 6=Dehumidification 7=Test 8=Shutdown 9=Unocc Free Cooling (NTFC)

FIELD AS SISTANT

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Configuration Menus

BACview MENU POINT NAME

HOME Select function below Properties/Equipment

CONFIG CONFIGURATION Configuration

SETPOINT

Sched

ALARMS

Occupied Heating Setpoint occ_ht_stpt 40 ---90 ° F 70 Occupied Cooling Setpoint occ_cl_stpt 55 ---99 ° F 74 Unoccupied Heating Setpoint unocc_ht_stpt 40---90 ° F 55 Unoccupied Cooling Setpoint unocc_cl_stpt 55---99 ° F 90 Effective Cool Setpoint eff_cl_stpt xx ° F Effective Heat Setpoint eff_ht_stpt xx ° F Optimal Start optm_start 0 --- 4 h r 4 Occ Relative Humidity Setpoint occ_dehum_stpt 0 --- u n o c c s e t -

Unocc Relative Humidity Setpoint

DCV Max Ctrl Setpoint iaq_stpt_max 0---9999 ppm 650 Powe r Ex ha ust S et poi nt pexh_stpt 20---90 %Open 50 Weekly schedule M O N --- S U N none Exceptions none

Occupied Alarm Hysteresis occ_spt_alrm_hyst2 --- 2 0 ° F 3

Alarm Delay (min/deg) spt_alrm_delay 0 --- 3 0 m i n u t e s 10 Unoccupied Low SPT Alarm

Limit Unoccupied High SPT Alarm

Limit

SUPPLY AIR TEMPERATURE ALARM Low SAT Alarm Limit sat_lo_alrm_lim 15---90 ° F 35 High SAT Alarm Limit sat_hi_alrm_lim 90 ---175 ° F 160

BACnet

OBJECT

SETPOINTS

unocc_dehum_stpt

ALARM CONFIGURATION

SPACE TEMPERATURE ALARM

uno_spt_alrm_lo_lmt35--- 90 ° F 45

uno_spt_alrm_hi_lmt45--- 100 ° F 95

RANGE DEFAULT FIELD ASSISTANT MENU

point %rh 30--- 100 %rh 95

Setpoints

(BACview Only)

Alarm Configuration

Low Space Humidity Alarm Limit

High Space Humidity Alarm Limit

Occ High CO2 Alarm Limit (ppm)

SPACE HUMIDITY ALARM sprh_lo_alrm_lim 0 --- 9 9 % r h 30

sprh_hi_alrm_lim 0 --- 9 9 % r h 70

IAQ / VENTILATION ALARM

iaq_occ_hi_lmt 0--- 9999 ppm 1200

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Configuration Menus (con’t)

BACview MENU POINT NAME

HOME Select function below Properties/Equipment

UNIT

Fan Mode fan_mode 1=Auto

DCV Max Vent Damper Pos iaq_dpr_max 10---60

S Fan Service Alarm Timer sfan_service_hrs 0--- 9999 hr 0 Comp 1 Service Alarm Timer comp1_ser-

Comp 2 Service Alarm Timer comp2_ser-

Filter Service Alarm Timer filter_service_hrs 0--- 9999 hr 600 Pushbutton Override pb_enable Disable/En-

Setpoint Adjustment stpt_adj_enable Disable/En-

Setpoint Adjustment Range stpt_adj_range + / --- 0 --- 5

Cooling Lockout Temperature oat_cl_lockout 0 --- 8 0 ° F 45 Economizer High OAT L ockout

Tem p HP Rev Cycle Lockout Temp hp_rev_cycle_loc

Heating Lockout Temperature oat_ht_lockout 35---150° F 65 Unocc Free Cool Enable ntfc_ena Disable/En-

Setpoint Separation min_stpt_sep 2 --- 1 0 ° F 5 Occupancy Source occ_source 1=Always

CALIBRATE

Space Temperature lcl_space_temp Space Temp Calibration spt_offset --- 9 . 9 --- 1 0 ° F 0 Supply Air Temperature lcl_sa_temp Supply Air Temp Calibration sat_offset --- 9 . 9 --- 1 0 ° F 0 Outdoor Air Temperature lc_oa_temp Outdoor Air Temp Calibration oat_offset --- 9 . 9 --- 1 0 ° F 0

BACnet

OBJECT

UNIT CONFIGURATION

vice_hrs

oat_ec_lockout 55 ---80° F 75

kout

SENSOR CALIBRATION

RANGE DEFAULT FIELD ASSISTANT MENU

2=Continuous 3=Always On

%Open

0--- 9999 hr 0

able

°F

--- 2 0 --- 3 0 ° F --- 3

able

occupied 2=BACnet Schedule 3=BAS On/ Off 4=Remote Occ Input

Continuous

Unit Configuration

Enable

Disable

Always Occupied

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Configuration Menus (con’t)

BACview MENU POINT NAME

HOME Select function below Properties/Equipment

INPUT

Input 1 Function ai1_function 1=No Se nsor

Input 2 Function ai2_function 1=No Se nsor

Input 3 Function di3_function 1=No Function

Input 3 Switch Configuration di3_type N/O

Input 5 Function di5_function 1=No Function

Input 5 Switch Configuration di5_type N/O

Input 8 Function di8_function 1=No Function

Input 8 Switch Configuration di8_type N/O

Input 9 Function di9_function 1=No Function

Input 9 Switch Configuration di9_type N/O

Space sensor type spt_type 1=T55

T5x Override Duration ovr _dur 0---24 hours 1

BACnet

OBJECT

INPUT CONFIGURATION

2=IAO Sensor 3=OAQ Sensor 4=Space RH Sensor

2=Compressor Safety 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Fire Shutdown 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Enthalpy Switch 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Humidistat 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=T56 (use for T59) 3=SPT Sensor

RANGE DEFAULT FIELD ASSISTANT MENU

No Sensor

1(NoFIOP) 2(FIOP)

Compressor Safety

N/O

Fire Shutdown

Unit Configuration

N/O

1(NoFIOP) 2(FIOP)

N/O

Humidistat

N/O

T55

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Configuration Menus (con’t)

BACview MENU POINT NAME

HOME Select function below Properties/Equipment

SERVICE

(Field Assistant Only)

TEST

Unit Type unit_type 1=Heat/Cool

Compressor Stages comp_stages On e stage/ Two

Economizer Exists econ_exist No/Yes No (No FIOP)

Reversing Valve Type rev_vlv_type Ooutputtype/B

Heat Type heat_type Electric/Gas Gas (48 Series

Number of Heat Stages heat_stages 1/2/0(no

Continuous Occupied Exhaust occ_exh No/Yes No Indoor CO2 S en sor Value @

Min mA Indoor CO2 S en sor Value @

Max mA Outdoor CO2 Sen sor Value @

Min mA Outdoor CO2 Sen sor Value @

Max mA System Space Temperature system_spt System Cooling Demand Level cool_de-

System Heating Demand Level heat_de-

System Outdoor Air Temperature

Service Test test_enable Disable/Enable Disable Fan Test fan_test Disable/Enable Disable Compressor 1 Test comp1_test Disable/Enable Disable Compressor 2 Test comp2_test Disable/Enable Disable Heat 1 Test heat1_test Disable/Enable Disable Heat 2 Test heat2_test Disable/Enable Disable Reversing Valve Test rev_vlv_test Disable/Enable Disable Dehumidification T est dehum_test Disable/Enable Disable Power Exhaust Test pexh_test Disable/Enable Disable Economizer Test econ_test 0 --- 1 0 0 % O p e n 0 Analog Output 2 Test ao2_test 0 --- 1 0 0 % 0

BACnet

OBJECT

SERVICE CONFIGURATION

iaq_ref_lo_ppm 0--- 9999ppm 0

iaq_ref_hi_ppm 0---9999ppm 2000

oaq_ref_lo_ppm 0---9999ppm 0

oaq_ref_hi_ppm 0 ---9999ppm 2000

mand_level

mand_level system_oat

SERVICE TEST

RANGE DEFAULT FIELD ASSISTANT MENU

2=HP O/B Ctrl 3=HP Y1/W1 Ctrl

Stage

output type

heat)

0 --- 3 0

Heat/Cool (TC and HC models) HP Y1/W1 Ctrl (TCQ and HCQ models)

One Stage (sizes 04--- 07, and A 0 8 --- A 1 2 ) Two St a ges (s ize s 08--- 30)

Ye s ( F I O P ) Ooutputtype

Units) Electric (50 Series Units)

0 (50 series cooling only units) 1(AllTCQsand HCQs, Low Nox units, single phase gas units, TC04 ---09 low and TC05 ---07 med heat 3 phase gas units) 2(TC04and 08--- 09 med, TC05 ---09 high heat 3 phase gas units, HC04 ---09 3 phase gas units and All 12---30 gas units)

Service Configuration

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Maintenance Menu

BACview MENU POINT NAME BACnet OBJECT RANGE

HOME Select function below Properties/Equipment

MAINT UNIT MAINTENANCE Maintenance

Occupancy Status occ_status Occupied/Unoccupied Space Temp Sensor spt_status

Setpoint Adjustment stpt_adj x°F System Cooling Demand Level cool_demand_level x System Heating Demand Level heat_demand_level x Safety Chain Feedback safety_status Off/Run Enabled

Fire Shutdown Status firedown_status Compressor Safety Status comp_status Normal/Trouble Active Compressor Stages comp_run x Active Heat Stages heat_run x Enthalpy Status enthalpy_status High/Low Humidistat Input Status humstat_status Low/High Filter Status filter_status Clean/Dirty Door Contact Status door_contact_status Off/On Reset Supply Fan Runtime Alarm sfan_rntm_clr Run/Clear Reset Comp 1 Runtime Alarm comp1_rntm_clr Run/Clear Reset Comp 2 Runtime Alarm comp2_rntm_clr Run/Clear Reset Filter Runtime Alarm filter_rntm_clr Off/On

1=Sensor Failure 2=SPT Sensor 3=T55/T56 4=Network 5=Airside Linkage 6=Locked Value

Run Enabled/Shutdown

FIELD AS SISTANT

OCCUPANCY MAINTENANCE

BAS On / Off keypad_ovrde

Schedule schedule Unoccupied/Occupied Pushbutton Override pb_status Off/Active Occupancy Contact occ_contact_status Off/On Override Time Remaining ovrde_time xxx min

RUNTIME Supply Fan Runtime sfan_rntm xxxxx Compressor 1 Runtime comp1_rntm xxxxx Compressor 2 Runtime comp2_rntm xxxxx Filter Runtime filter_rntm xxxxx

1=Inactive 2=Occupied 3=Unoccupied

APPENDIX A -- USER INTERFACE MENUS (CON’T)

Alarm Menus

BACview MENU POINT NAME BACnet OBJECT RANGE

HOME Select function below Properties/Equipment

ALARM CURRENT ALARMS Alarms

Safety Chain safety_alarm Normal/Alarm Fire Shutdown fire_alarm Normal/Alarm Supply Fan Failure sfan_fail_alarm Normal/Alarm Supply Fan in Hand sfan_hand_alarm Normal/Alarm Compressor Safety comp_alarm Normal/Alarm Space Temp Sensor spt_fail Normal/Alarm Supply Air Temp Sensor sat_alarm Normal/Alarm Outdoor Air Temp Sensor Alarm oat_alarm Normal/Alarm Space Relative Humidity Sensor sprh_alarm Normal/Alarm IAQ Sensor iaq_alarm Normal/Alarm OAQ Sensor oaq_alarm Normal/Alarm Space Temperature spt_alrm_status Normal/Alarm

Alarming Temperature spt_alrm_temp xxx ° F

Alarm Limit Exceeded spt_alrm_lmt xxx ° F High Supply Air Temperature sat_hi_alarm Normal/Alarm Low Supply Air Temperature sat_lo_alarm Normal/Alarm Setpoint Slider slidepot_alarm Normal/Alarm Switch Configuration di_cfg_alarm Normal/Alarm Analog Input Configuration ai_cfg_alarm Normal/Alarm High Space Relative Humidity sprh_hi_alarm Normal/Alarm Low Space Relative Humidity sprh_lo_alarm Normal/Alarm High CO2 co2_alarm Normal/Alarm Supply Fan Runtime sfan_rntm_alarm Normal/Alarm Compressor 1 Runtime comp1_rntm_alarm Normal/Alarm Compressor 2 Runtime comp2_rntm_alarm Normal/Alarm Filter filter_alarm Clean/Dirty Airside Linkage Alarm air_linkage_fail Normal/Alarm

Alarm Module Event History (100 most recent) (BACview only)

Active Alarms Buffer Active Faults Buffer R e t u r n e d --- To --- N o r m a l ( R T N ) Buffer Manually Cleared (CLR) Buffer

FIELD AS SISTANT

APPENDIX B -- THIRD PARTY POINTS LIST

(IN ALPHABETICAL ORDER)

BACnet Modbus N2 LON Works

Point Name

Active Compressor Stages

Active Heat Stages Airside Linkage Alarm Analog Input Con f iguration

BAS On / Off Compressor 1 Relay State Compressor 1 Runtime Compressor 1 Runtime Compressor 1 Service Alarm Timer Compressor 1 Test R/W comp1_test BV:81005 Compressor 2 Relay State Compressor 2 Runtime Compressor 2 Runtime Compressor 2 Service Alarm Timer Compressor 2 Test R/W comp2_test BV:81004

Compressor Safety Compressor Safety Status Continuous Occupied Exhaust Cooling Lockout Tem p e ratu r e DCV Max Ctrl Setpoint DCV Max Vent Damper Pos Dehumidification Relay State Dehumidification T est R/W dehum_test BV:81006

Door Contact Status Economizer Exists R/W econ_exist BV:99001 Economizer High OAT Lockout Temp

Economizer Output Economizer Test R/W econ_test AV:81001 Effective Cool Setpoint Effective Heat Setpoint Enthalpy (BACnet) R/W oae BV:1901

Enthalpy Status

Facto ry Test Facto ry Test Analog 1 Control Facto ry Test Analog 2 Control

Read/

Write

R/W

BACnet Point

Name

comp_run AV:2020

heat_run AV:2003 air_linkage_fail

ai_cfg_alarm BV:7026

keypad_ovrde MSV:1001

comp_1 BV:2005

comp1_rntm AV:2017 comp1_rntm_ alarm comp1_service_hrs

comp_2 BV:2004

comp2_rntm AV:2018 comp2_rntm_ alarm comp2_service_hrs

comp_alarm BV:7013

comp_status BV:1008

occ_exh BV:9002

oat_cl_lockout AV:9002

iaq_stpt_max AV:3013

iaq_dpr_max AV:9011

dehum BV:2006

door_contact_status

oat_ec_lockout

econ_output AV:2001

eff_cl_stpt AV:3005

eff_ht_stpt AV:3006

enthalpy_status

fac_test_enable

ao1_fac_test AV:91001

ao2_fac_test AV:91002

OBJECTIDRegister

BV:7030

BV:7014

AV:83006

BV:7015

AV:83007

BV:1010

AV:9008

BV:1002

BV:91000

Typ e

float value

unsigned int

discrete in

float value

discrete in

float value

40031 ADF 10

40033 ADF 11

40133 ADI 1

10030 BI 30

40043 ADF 16

40045 ADF 17 SNVT_ppm (29)

40047 ADF 18

10009 BI 9

40051 ADF 20

40055 ADF 22

40057 ADF 23

Network

Point

Typ e

Network

Point

Address

SNVT Type SNVT Name

SNVT_count_inc (9)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_lev_percent (81)

SNVT_switch (95)

SNVT_lev_percent (81)

SNVT_temp_p (105)

nvoCompStages

nvoHeat Stages

nviBASOnOff

nvoCompSafety

nviCoolLckTem p

nviDCVMaxPPM

nviDCVMaxPos

nvoDehumRelay

nvoEconOutput

nvoEffCoolSP

nvoEffHeatSP

APPENDIX B -- THIRD PARTY POINTS LIST (CON’T)

(IN ALPHABETICAL ORDER)

BACnet Modbus N2 LON Works

Point Name

Facto ry Test Relay 1 Control

Facto ry Test Relay 2 Control

Facto ry Test Relay 3 Control

Facto ry Test Relay 4 Control

Facto ry Test Relay 5 Control

Facto ry Test Relay 6 Control

Facto ry Test Relay 7 Control

Facto ry Test Relay 8 Control

Fan Off Delay R/W fan_delay_off AV:9024

Filter Filter Runtime R filter_rntm AV:2015

Filter Service Alarm Timer

Filter Status R filter_status BV:1004

Fire Shutdown Fire Shutdown Status Heat Stage 1 Relay State Heat Stage 2 Relay State Heating Lockout Tem p e ratu r e

High CO2 High Space Relative Humidity High Space Temp Alarm High Supply Air Temperature HP Rev Cycle Lockout Temp Humidistat Input Status

IAQ Sensor

Indoor Air CO2 Indoor CO2 Sensor Value @ Max m A Indoor CO2 Sensor Value @ Min mA

Read/

Write

R/W

BACnet Point

Name

relay1_fac_test

relay2_fac_test

relay3_fac_test

relay4_fac_test

relay5_fac_test

relay6_fac_test

relay7_fac_test

relay8_fac_test

filter_alarm BV:7017

filter_service_hrs

fire_alarm BV:7007 firedown_status

heat_1 BV:2003

heat_2 BV:2002 oat_ht_lockout

co2_alarm BV:7016

sprh_hi_alarm BV:7018

spt_hi_alarm BV:7011

sat_hi_alarm BV:7020 hp_rev_cycle_ lockout humstat_status

iaq_alarm BV:7005

iaq AV:1009 iaq_ref_hi_ pp m iaq_ref_lo_pp m

OBJECTIDRegister

BV:91001

BV:91002

BV:91003

BV:91004

BV:91005

BV:91006

BV:91007

BV:91008

AV:2019

BV:1005

AV:9003

AV:9004

BV:1006

AV:9010

AV:9009

Typ e

discrete in

float value

discrete in

float value

discrete in

float value

discrete in

float value

10031 BI 31

40067 ADF 28

10032 BI 32

40069 ADF 29

10033 BI 33

10034 BI 34

10035 BI 35

10036 BI 36

40071 ADF 30

10037 BI 37

40073 ADF 31 SNVT_ppm (29) nvoIAQ

Network

Point

Typ e

Network

Point

Address

SNVT Type SNVT Name

SNVT_switch (95)

SNVT_time_hour (124)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_switch (95)

nvoFilter

nviFilterAlmTime

nvoFireShutdown

nviHeatLckTem p

nvoHiCO2Alm nvoHiSPRHAlm nvoHiSpaceTemp

nvoHiSATAlm nviPRevClckTem p

nvoIAQSensor

APPENDIX B -- THIRD PARTY POINTS LIST (CON’T)

(IN ALPHABETICAL ORDER)

BACnet Modbus N2 LON Works

Point Name

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 input_1 R ai_1 AI:1001 input_10 R ai_10 AI:1010 input_11 R ai_11 AI:1011 input_2 R ai_2 AI:1002 input_3 R di_3 BI:1003 input_4 R di_4 BI:1004 input_5 R di_5 BI:1005 input_7 R ai_7 AI:1007 input_8 R di_8 BI:1008 input_9 R di_9 BI:1009 Low Space Relative Humidity Low Space Temp Alarm Low Supply Air Temperature Maximum Heating SAT Min Setpoint Separation Minimum Cooling SAT

OAQ Sensor Occ Relative Humidity Setpoint

Occupancy Contact Occupancy Source R/W occ_source MSV:1002

Occupancy Status

Operating Mode

Optimal Start

Outdoor Air CO2 Outdoor Air Temp Sensor Alarm Outdoor Air Temperature Outdoor CO2 S ensor Value @ Max m A Outdoor CO2 S ensor Value @ Min mA

Read/

Write

R/W

BACnet Point

Name

ai1_function

ai2_function

di3_function

di3_type

di5_function

di5_type

di8_function

di8_type

di9_function

di9_type

sprh_lo_alarm BV:7019

spt_lo_alarm BV:7012

sat_lo_alarm BV:7021

sat_ht_max AV:83004

min_stpt_sep AV:63

sat_cl_min AV:83003

oaq_alarm BV:7006 occ_dehum_stpt occ_contact_status

occ_status BV:2008

run_status MSV:2002

optm_start AV:9026

oaq AV:1010

oat_alarm BV:7003

oa_temp AV:1003 oaq_ref_hi_pp m oaq_ref_lo_pp m

OBJECTIDRegister

MSV:8100 1

MSV:8100 2

MSV:8100 3

MSV:8101 3

MSV:8100 5

MSV:8101 5

MSV:8100 8

MSV:8101 8

MSV:8100 9

MSV:8101 9

AV:3011

BV:1007

AV:9014

AV:9013

Typ e

discrete in

float value

discrete in

unsigned int

float value

10038 BI 38

10039 BI 39

10040 BI 40

10041 BI 41

40083 ADF 36

10018 BI 18

30001 ADI 13

40147 ADF 61

40085 ADF 37 SNVT_ppm (29) nvoOAQ

40087 ADF 38

Network

Point

Typ e

Network

Point

Address

SNVT Type SNVT Name

SNVT_switch (95)

SNVT_lev_percent (81)

SNVT_switch (95)

SNVT_count_inc (9)

SNVT_time_hour (124)

SNVT_temp_p (105)

nvoLoSPRHAlm

nvoLoSpaceTemp

nvoLoSATAlm

nvoOAQSens or

nviOccRHSP

nvoOccStatus

nvoOperatingMode

nviOptimalStart

nvoOAT

APPENDIX B -- THIRD PARTY POINTS LIST (CON’T)

(IN ALPHABETICAL ORDER)

BACnet Modbus N2 LON Works

Point Name

Override Time Remaining

Password Protected Output Variable

Powe r Ex ha ust R el ay State

Powe r Ex ha ust S et point

Power Exhaust Test R/W pexh_test BV:81008 Pushbutton Override R pb_status BV: 31 Reset Comp 1 Runtime Alarm Reset Comp 2 Runtime Alarm Reset Filter Runtime Alarm Reset Supply Fan Runtime Alarm Safety Chain R safety_alarm BV:7024 Safety Chain Feedback Schedule R/W schedule BV:8000 Service Test R/W test_enable BV:81000 Setpoint / C ool ing Occupied Setpoint Setpoint / C ool ing Setpoint Adjust Setpoint / C ool ing Unoccupied Setpoint Setpoint / Effective Cooling Setpoint Setpoint / Effective Heating Setpoint Setpoint / Heating Occupied Setpoint Setpoint / Heating Setpoint Adjust Setpoint / Heating Unoccupied Setpoint

Setpoint Adjust

Setpoint Adjustment Setpoint Adjustment Range Setpoint Slider R slidepot_alarm BV:7002 Shutdown R/W shutdown BV:9001 Space Relative Humidity Space Relative Humidity Sensor Space sensor type R/W spt_type MSV:9001

Space Temp / Override Time Remaining

Space Temp / Zone Tem p

Space Temp Sen sor Space Temp Sen sor R spt_status MSV:2003

Space Temperature Space Temperature

--- Prime Variable

Space Temperature Offset Pot

Read/

Write

R/W

BACnet Point

Name

ovrde_time AV:2016

ppo AV:90000

pexh BV:2010

pexh_stpt AV:3010

comp1_rntm_ clr

comp2_rntm_ clr

filter_rntm_clr BV:7517

sfan_rntm_clr BV:7510

safety_status BV:1009

occ_cl_stpt AV:3001

cl_stpt_adj AV:2

unocc_cl_stpt AV:3003

eff_cl_stpt AV: 4

eff_ht_stpt AV:5

occ_ht_stpt AV:3002

ht_stpt_adj AV:3

unocc_ht_stpt AV:3004 stpt_adj_enable

stpt_adj AV:1006 stpt_adj_rang e

space_rh AV:1011

sprh_alarm BV:7022

override_time_remaining

zone_temp AI:1

spt_fail BV:7001

spt_alrm_statu s

space_temp AV:2007

stpt_adj_offset AV:91006

OBJECTIDRegister

BV:7514

BV:7515

BV:1013

AV:9015

AV:1

BV:37

Typ e

float value

discrete out

float value

discrete out

float value

discrete in

float value

40093 ADF 41

40097 ADF 43

22 BO 22

40009 ADF 4

40015 ADF 7

40019 ADF 9

40017 ADF 8

26 BO 26

40099 ADF 44

40101 ADF 45

40103 ADF 46

10045 BI 45

10046 BI 46

40107 ADF 48

Network

Point

Typ e

Network

Point

Address

SNVT Type SNVT Name

SNVT_time_min (123)

SNVT_lev_percent (81)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_lev_percent (81)

SNVT_switch (95)

SNVT_temp_p (105)

nvoOvrTimeR emain

nviPwrExhSp

nvoSafetyChain

nviOccCoolSP

nviUnoccCoolSP

nviOccHeatSP

nviUnoccHeatSP

nviSPAdjEnable

nvoSPAdjust nviSPAd jRa n ge

nvoSpaceRH nvoSpaceRHSensor

nvoSPTempSensor

nvoSpaceTem p

APPENDIX B -- THIRD PARTY POINTS LIST (CON’T)

(IN ALPHABETICAL ORDER)

BACnet Modbus N2 LON Works

Point Name

Supply Air Temp Sensor

Supply Air Temperature

Supply Fan Failure

Supply Fan in Hand Supply Fan Relay State Supply Fan Runtime R sfan_rntm AV:2014

Supply Fan Runtime Supply Fan Service Alarm Timer

Supply Fan Status Switch Configuration R di_cfg_alarm BV:7025 System Cooling Demand Level System Heating Demand Level

System is sh ut down System Mode R mode_status MSV:2001 System OAT Master R mstr_oa_temp AV:80001 System Outdoor Air Tem p e ratu r e System Space Temperature T5x Override Duration

Unit Start Del ay Unit Type R/W unit_type MSV:9018 Unocc Free Cool Enable Unocc Relative Humidity Setpoint Vent Dmpr Pos / DCV Min Pos

Read/

Write

R/W

BACnet Point

Name

sat_alarm BV:7004

sa_temp AV:1008 sfan_fail_alar m sfan_hand_ala rm

sfan BV:2001

sfan_rntm_ala rm

sfan_service_hrs

sfan_status BV:1003

cool_demand_level

heat_demand_level

shutdown_status

system_oat AV:1901

system_spt AV:1902

ovr_dur AV:9023

start_delay AV:9007

ntfc_ena BV:80001 unocc_dehum_stpt

econ_min AV:9005

OBJECTIDRegister

BV:7008

BV:7009

BV:7010

AV:83005

AV:9006

AV:9036

BV:2011

AV:3012

Typ e

discrete in

float value

discrete in

float value

10047 BI 47

40109 ADF 49

10023 BI 23

10024 BI 24

40119 ADF 54

40123 ADF 56

40127 ADF 58

40129 ADF 59

40131 ADF 60

Network

Point

Typ e

Network

Point

Address

SNVT Type SNVT Name

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_switch (95)

SNVT_temp_p (105)

SNVT_time_sec (107)

SNVT_lev_percent (81)

nvoSATSensor

nvoSAT

nvoSFRelay

nvoFanStatus

nviSysOAT nviSysSpaceT emp

nviUnitStartDly

nviUnoccRHSP

nviDCVMinPos

RTU--OPEN START--UP SHEET

RTU Model Number: Date: RTU Serial Number: RTU--- OPEN Software Version: Company:

Protocol and Boad Rate: Network Address:

Performed by:

CONFIGURATION POINTS

BACview

HOME Select function below

CONFIG CONFIGURATION

SET-

POINT

ALARMS

Occupied Heating Setpoint occ_ht_stpt 40--- 90 ° F 70 Occupied Cooling Setpoint occ_cl_stpt 55 - --99 ° F 74 Unoccupied Heating Setpoint unocc_ht_stpt 40--- 90 ° F 55 Unoccupied Cooling Setpoint unocc_cl_stpt 55 --- 99 ° F 90 Effective Cool Setpoint eff_cl_stpt xx ° F Effective Heat Setpoint eff_ht_stpt xx ° F Optimal Start optm_start 0 --- 4 h r 4 Occ Relative Humidity Setpoint occ_dehum_stpt 0--- unocc setpoint

Unocc Relative Humidity Setpoint unocc_de-

DCV Max Ctrl Setpoint iaq_stpt_max 0 ---9999 ppm 650 Power Exhaust Setpoint pexh_stpt 20 --- 90 %Open 50

Occupied Alarm Hysteresis occ_spt_alrm_hyst 2 --- 2 0 ° F 3 Alarm Delay (min/deg) spt_alrm_delay 0 --- 3 0 m i n u t e s 10 Unoccupied Low SPT Alarm Limit uno_spt_alrm_lo_lmt35--- 90 ° F 45

Unoccupied High SPT Alarm Limit uno_spt_alrm_hi_lmt45--- 100 ° F 95

Low SAT Alarm Limit sat_lo_alrm_lim 15---90 ° F 35 High SAT Alarm Limit sat_hi_alrm_lim 90--- 175 ° F 160

POINT NAME

SUPPLY AIR TEMPERATURE ALARM

BACnet

OBJECT

SETPOINTS

%rh 30--- 100 %rh 95

hum_stpt

ALARM CONFIGURATION

SPACE TEMPERATURE ALARM

RANGE DEFAULT ENTRY

SPACE HUMIDITY ALARM Low Space Humidity Alarm Limit sprh_lo_alrm_lim 0 --- 9 9 % r h 30 High Space Humidity Alarm Limit sprh_hi_alrm_lim 0 --- 9 9 % r h 70

IAQ / VENTILATION ALARM

Occ High CO2 Alarm Limit (ppm) iaq_occ_hi_lmt 0 --- 9999 ppm 1200

CONFIGURATION POINTS (CON’T)

BACview

HOME Select function below

CONFIG CONFIGURATION

UNIT

Fan Mode fan_mode 1=Auto

Unit Start Delay start_delay 0 --- 3 0 s e c 5 Fan Off Delay fan_delay_off 0 --- 1 8 0 s e c 90 Minimum Cooling SAT sat_cl_min 45 ---75 ° F 50 Maximum Heating SAT sat_ht_max 95 --- 150° F 120 Vent Dmpr Pos / DCV Min Pos econ_min 0 --- 1 0 0 % O p e n 20 DCV Max Vent Damper Pos iaq_dpr_max 10 ---60 %Open 50 S Fan Service Alarm Timer sfan_service_hrs 0 --- 9999 hr 0 Comp 1 Service Alarm Timer comp1_ser-

Comp 2 Service Alarm Timer comp2_ser-

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 --- 8 0 ° F 45 Economizer High OAT Lockout Temp oat_ec_lockout 55 ---80° F 75 HP Rev Cycle Lockout Temp hp_rev_cycle_lock-

Heating L ockout Temperature oat_ht_lockout 35 --- 150° F 65 Unocc Free Cool Enable ntfc_ena Disable/Enable Disable Setpoint Separation min_stpt_sep 2 --- 1 0 ° F 5 Occupancy Source occ_source 1=Always occupied

CAL-

IBRATE

Space Temp Calibration spt_offset --- 9 . 9 --- 1 0 ° F 0 Supply Air Temp Calibration sat_offset --- 9 . 9 --- 1 0 ° F 0 Outdoor Air Temp Calibration oat_offset --- 9 . 9 --- 1 0 ° F 0

POINT NAME

BACnet

OBJECT

UNIT CONFIGURATION

2=Continuous 3=Always On

0--- 9999 hr 0

vice_hrs

0--- 9999 hr 0

vice_hrs

--- 2 0 --- 3 0 ° F --- 3

out

2=BACnet Schedule 3=BAS On/Off 4=Remote Occ Input

SENSOR CALIBRATION

RANGE DEFAULT ENTRY

Continuous

Always Occupied

CONFIGURATION POINTS (CON’T)

BACview

HOME Select function below

CONFIG CONFIGURATION

INPUT

Input 1 Function ai1_function 1=No Sensor

Input 2 Function ai2_function 1=No Sensor

Input 3 Function di3_function 1=No Function

Input 3 Switch Configuration di3_type N/O

Input 5 Function di5_function 1=No Function

Input 5 Switch Configuration di5_type N/O

Input 8 Function di8_function 1=No Function

Input 8 Switch Configuration di8_type N/O

Input 9 Function di9_function 1=No Function

Input 9 Switch Configuration di9_type N/O

Space sensor type spt_type 1=T55

T5x Override Duration ovr_dur 0 --- 24 hours 1

POINT NAME

BACnet

OBJECT

INPUT CONFIGURATION

2=IAO Sensor 3=OAQ Sensor 4=Space RH Sensor

2=Compressor Safety 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Fire Shutdown 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Enthalpy Switch 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=Humidistat 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact

N/C

2=T56 (use for T59) 3=SPT Sensor

RANGE DEFAULT ENTRY

No Sensor

1(NoFIOP)

2(FIOP)

Compressor Safety

N/O

Fire Shutdown

N/O

1(NoFIOP)

2(FIOP)

N/O

Humidistat

N/O

T55

CONFIGURATION POINTS (CON’T)

BACview

HOME Select function below

CONFIG CONFIGURATION

SERVICE

Unit Type unit_type 1=Heat/Cool

Compressor Stages comp_stages One stage/ Two

Economizer Exists econ_exist No/Yes No (No FIOP)

Reversing Valve Type rev_vlv_type Ooutputtype/B

Heat Type heat_type Electric/Gas Gas (48 Series Units)

Number of Heat Stages heat_stages 1/2/0(noheat) 0 (50 series cooling

Continuous Occupied Exhaust occ_exh No/Yes No 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 Outdoor C O2 Sensor Value @ Max

POINT NAME

BACnet

OBJECT

SERVICE CONFIGURATION

2=HP O/B Ctrl 3=HP Y1/W1 Ctrl

Stage

output type

oaq_ref_lo_ppm 0---9999ppm 0

oaq_ref_hi_ppm 0 ---9999ppm 2000

RANGE DE FAULT ENTRY

Heat/Cool (TC and HC models) HP Y1/W1 Ctrl (TCQ and HCQ models)

One Stage (sizes 04--- 07, and A08---A12) Two Stage s (si z es 08--- 30)

Yes ( FIO P ) Ooutputtype

Electric (50 Series Units)

only units) 1(AllTCQsandHCQs, Low Nox units, single phase gas units, TC04--- 09 low and TC05---07 med heat 3 phase gas units) 2 (TC04 and 08---09 med, TC05-- -09 high heat 3 phase gas units, H C 0 4 --- 0 9 3 p h a s e g a s units and All 12 ---30 gas units)

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

Catalog No:48---50HCTQ ---01T

Replaces: NEW

Carrier 50HCQ04-12 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual