VariTrac II Central Control Panel

A/C Unit Type: Input

Binary

The type of unit the CCP is configured to control. Determined by the state of setting seven on DIP switch three (S3).
0=2 Heat / 2 Cool, 1=Heat Pump

Alarm Event Class [1-3]

Numeric

This is a three element array containing entries for alarm classes Informational, Auto Reset, and Manual Reset diagnostics. Each entry contains an index into the event action table. The event action table contains both a set of instructions for alarm routing and a list of referencer objects (the potential receivers).

Auxiliary Heat Control: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Auxiliary Heat Control: Tracer" property.
0=Disabled, 1=Auto

Auxiliary Heat Control: Tracer

Binary

The value that is communicated by Tracer Summit to the VariTrac II Central Control Panel and is used to disable auxiliary heat on units configured as heat pumps.
0=Disabled, 1=Auto

This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Binary Out [1-6]

Binary

This arrayed property indicates the current state of each of the six binary outputs.
0=Off, 1=On

Bypass Control Method: Input

Binary

Reflects the state of setting six on DIP switch two (S2) and indicates if the Central Control Panel’s bypass control is based on velocity pressure or static pressure.
0=Velocity, 1=Static

Bypass Damper Position

Numeric

The current position of the system bypass damper. Range: 0 to 100%

Callers: Cool

Numeric

Indicates the number of UCMs that are cool callers. Range: 0 to 16

Callers: Heat

Numeric

Indicates the number of UCMs that are heat callers. Range: 0 to 16

Callers: Strong Cool

Numeric

Indicates the number of UCMs that are strong cool callers. Range: 0 to 16

Callers: Strong Heat

Numeric

Indicates the number of UCMs that are strong heat callers. Range: 0 to 16

Changeover Timer

Numeric

The number of minutes remaining before the VariTrac II Central Control Panel system is allowed to change its heat/cool mode. Range: 0 to 60 minutes

Communication Address

Numeric

The UCM’s communications address.

Communication Bad Message Count

Numeric

The number of message errors that have occurred while attempting to communicate with the UCM.

Communication Channel

Numeric

The number of the BCU channel to which the UCM has been assigned.

Communication Error Count

Numeric

The number of communication errors that have occurred while attempting to communicate with the UCM.

Communication No Answer Count

Numeric

The number of unanswered communication attempts with the UCM.

Communication Retry

Binary

This property is True when an attempt to send control data fails and False when communications are successful.
0=False, 1=True

Communication State

Binary

The communication status between the BCU and the UCM.
0=Down, 1=Up

Compressor 1 Status

Binary

The active status of compressor number 1.
0=Off, 1=On

Note: This is a Voyager property.

Compressor 2 Exists

Binary

Indicates if compressor 2 exists on the unit.
0=No, 1=Yes

Note: This is a Voyager property.

Compressor 2 Status

Binary

The active status of compressor 2.
0=Off, 1=On

Note: This is a Voyager property.

Compressor Control: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Compressor Control: Tracer" property.
0=Disabled, 1=Auto

Compressor Control: Tracer

Binary

The value communicated by Tracer Summit to the VariTrac II Central Control Panel and used to disable compressor operation.
0=Disabled, 1=Auto

Note: This disables all compressor operation, whether the unit is 2 heat/2 cool or heat pump. This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Compressor Lockout: Input

Binary

Indicates if setting eight on DIP switch three (S3) is set to lockout (disable) all compressors.
0=No, 1=Yes

Condenser Fan A Contactor

Binary

The active status of condenser fan A.
0=Off, 1=On

Note: This is a Voyager property.

Condenser Fan B Contactor

Binary

The active status of condenser fan B.
0=Off, 1=On

Note: This is a Voyager property.

Config: Unit Type

Multi-State

The unit type of Voyager Rooftop.
0=Gas Heat
1=Electric Heat
2=Undefined
3=Heat Pump

Note: This is a Voyager property.

Configuration: Economizer

Binary

Indicates if the unit is configured with an optional economizer.
0=Not Installed, 1=Installed

Note: This is a Voyager property.

Control Mode: Active

Binary

The current control mode of the Central Control Panel.
0=Occupied, 1=Unoccupied.

Control Mode: Input

Binary

Reflects the state of binary input #1 on the CCP and will determine the CCP’s control mode if "Unit Control Source: Tracer" is Local or if the CCP loses communication with the BCU.
0=Occupy, 1=Unoccupy

Cooling Stages Enabled: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Cooling Stages Enabled: Tracer" property. Range: 0 to 2

Cooling Stages Enabled: Tracer

Numeric

The value communicated by Tracer Summit to the VariTrac II Central Control Panel limiting the actual number of cooling stages allowed. Range: 0 to 2 This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Diag: Automatic Reset

Binary

Indicates if an automatic reset diagnostic has occurred. This diagnostic type is cleared when the diagnostic condition no longer exists.
0=No, 1=Yes

Diag: CCP SA Temp Sensor Fail

Binary

Indicates if the VariTrac II Central Control Panel is receiving a valid input from its supply air temperature sensor.
0=Normal, 1=Failed

Diag: Comp 1 High Press Cutout

Binary

Indicates if any of the following apply to compressor 1: a high pressure condition exists, the winding temperature limit switch is open, or the compressor circuit breaker has tripped.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Comp 1 Locked Out

Binary

Indicates if compressor 1 is locked out due to a device in the compressor’s contactor coil circuit being open or low pressure control being open four consecutive times without more than three continuous minutes of compressor operation. This is a manual reset diagnostic.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Comp 1 LPC Input Open

Binary

Indicates if the low pressure control has opened in the compressor 1 disable input circuit, or if a field-installed device has opened. This is an auto reset diagnostic.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Comp 2 High Press Cutout

Binary

Indicates if any of the following apply to compressor 2: a high pressure condition exists, the winding temperature limit switch is open, or the compressor circuit breaker has tripped.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Comp 2 Locked Out

Binary

Indicates if compressor 2 is locked out due to a device in the compressor’s contactor coil circuit being open or low pressure control being open four consecutive times without more than three continuous minutes of compressor operation. This is a manual reset diagnostic.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Comp 2 LPC Input Open

Binary

Indicates if the low pressure control has opened in the compressor 2 disable input circuit, or if a field-installed device has opened. This is an auto reset diagnostic.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Control Request

Binary

Indicates if the CCP is requesting the BCU to send the latest control data.
0=No, 1=Yes

This property is "Yes" if power has been cycled on the CCP or if communications with the CCP are reestablished after they had been down for over 15 minutes.

Diag: Dirty Filter

Binary

Indicates if the Voyager has determined that a dirty filter condition exists.
0=No, 1=Yes

Note: This is a Voyager property.

Diag: Econ Min Position Fail

Binary

Indicates if the minimum position setpoint input on the economizer module is reading an open or short condition. This is valid only on units with economizers. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: Flow Sensor Fail

Binary

Indicates if the VariTrac II Central Control Panel is receiving a valid input from its velocity/pressure sensor.
0=Normal, 1=Failed

Diag: Heat Fail

Binary

Indicates if either of the high temperature limit switches on a gas heat unit are open. When these limit switches open, a high temperature condition exists. This input is valid on all units with gas heat. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: High Temp Input

Binary

Indicates if an open circuit on the TCI high temp input (TB2) exists. A field-installed device is normally wired to this input. This is an auto reset diagnostic.
0=Normal, 1=High Temp

Note: This is a Voyager property.

Diag: Information Warning

Binary

Indicates if an information only diagnostic has occurred. An information only diagnostic does not inhibit any unit operation.
0=No, 1=Yes

Diag: Manual Reset Required

Binary

Indicates if a manual reset diagnostic has occurred. The manual reset diagnostic requires that the unit be reset either from the Tracer or the unit (by cycling the Voyager’s power).
0=No, 1=Yes

Diag: OA Rel Humid Fail

Binary

Indicates if the outdoor air relative humidity sensor input on the economizer board is reading an open or short condition. This diagnostic is valid only on units with economizers. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: OA Temp Sensor Fail

Binary

Indicates if the outdoor air temperature sensor input on the Voyager is reading an open or short condition. This diagnostic is valid on all Voyager units. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: RA Rel Humid Fail

Binary

Indicates if the return air relative humidity sensor input on the economizer board is reading an open or short condition. This diagnostic is valid only on units with economizers. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: RA Temp Sensor Fail

Binary

Indicates if the return air temperature sensor input on the economizer board is reading an open or short condition. This diagnostic is valid only on units with economizers. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: Reference Enthalpy Fail

Binary

Indicates if the reference enthalpy setpoint input on the economizer board is reading an invalid value. This diagnostic is valid only on units with economizers which are also set up for reference enthalpy control. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: Supply Fan Fail

Binary

Indicates if the supply air flow cooling input on the Voyager has been open for five seconds while the supply fan output was on. This is a manual reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Diag: Voyager Comm Fail

Binary

The communication statu between the CCP and the Voyager.
0=Normal, 1=Failed

Note: This property is Normal if a Voyager is communicating or if a Voyager has not communicated with the CCP since power was cycled to the CCP.

Diag: Voyager SA Temp Sens Fail

Binary

Indicates if the supply air temperature sensor input on the unit is reading an out-of-range value. This diagnostic is valid on all units with supply air temperature sensors. This is an auto reset diagnostic.
0=Normal, 1=Failed

Note: This is a Voyager property.

Econ Calibration in Process

Binary

Indicates if the economizer is currently being calibrated. This occurs at initial power up and when the economizer exits the economizing mode. This property is valid only for units with economizers.
0=No, 1=Yes

Note: This is a Voyager property.

Econ Min Pos Mult Enable: Setup

Binary

Determines if the "Econ Min Pos Multiplier: Ref" property is enabled.
0=Auto, 1=Enabled

If the referencer is not enabled, the "Econ Min Pos Multiplier: Tracer " property is set equal to 1.0.

Econ Min Pos Multiplier: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Econ Min Pos Multiplier: Tracer" property. Range: 0.0 to 10.0This referencer has no effect on the "Econ Min Pos Multiplier: Tracer" property if the "Econ Min Pos Mult Enable: Setup" property is "Auto".

Econ Min Pos Multiplier: Tracer

Numeric

The value communicated by Tracer Summit to the VariTrac II Central Control Panel and iused to adjust the Voyager’s active economizer minimum position. Range: 0.0 to 10.0This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local or when a communicating Voyager is not present.

Economizer Damper Position

Numeric

The current position of the outdoor air damper. This property is valid only for units with economizers. Range: 0 to 100%

Note: This is a Voyager property.

Economizer Min Position

Numeric

The minimum position that the outdoor air damper is controlled to if outside air conditions are not OK to economize. This property is valid only for units with economizers. Range: 0 to 50%

Note: This is a Voyager property.

Economizer Min Position: Input

Numeric

The minimum position set via the economizer damper minimum position potentiometer on the economizer module. This property is valid only on units with economizers. Range: 0 to 50 %

Note: This is a Voyager property.

Economizer Min Position: Local

Numeric

This property indicates the edited economizer minimum damper position. This value can be edited at the VariTrac II Central Control Panel or on the Tracer Summit system. Range: 0 to 50%

Note: This value does not show the effect of the minimum position multiplier.

Economizer: OK to Economize?

Binary

Indicates if the outdoor air can be used for free cooling.
0=No, 1=Yes

Note: This is a Voyager property.

Economizer: Use Local Min Pos

Binary

This value determines if the Voyager’s local minimum position potentiometer (i.e., "Economizer Min Position: Input") is used to determine the economizer minimum position.
0=No, 1=Yes

If this property is "No", the economizer minimum position is determined using the "Economizer Min Position: Local" property.

Exhaust Fan Status

Binary

The status of the exhaust fan output.
0=Off, 1=On

Note: This is a Voyager property.

Groups[1-4]

Object ID

An array consisting of the VariTrac II CCP Group object ID’s associated with this CCP.

Heat Stage 1 Status

Binary

The status of heating stage 1.
0=Off, 1=On

Note: This is a Voyager property.

Heat Stage 2 Status

Binary

The status of heating stage 2.
0=Off, 1=On

Note: This is a Voyager property.

Heat/Cool Changeover: Input

Binary

Reflects the state of binary input #3 on the CCP and determines the CCP’s heat/cool changeover mode if "Unit Control Source: Tracer" is Local or if the CCP loses communication with the BCU.
0=Auto, 1=Manual

Heat/Cool Changeover: Setup

Binary

Determines the value of the "Heat/Cool Changeover: Tracer" property.
0=Auto, 1=Tracer

Heat/Cool Changeover: Tracer

Binary

If this property is "Auto", the CCP automatically determines the heat/cool mode. If this property is set to "Tracer", the "Heat/Cool Mode: Tracer" property determines the actual heat/cool mode.
0=Auto, 1=Tracer

This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Heat/Cool Mode: Active

Binary

The current heat/cool mode of the of the VariTrac II Central Panel.
0=Heating, 1=Cooling

Heat/Cool Mode: Input

Binary

Reflects the state of binary input #2 on the CCP and determines the heat/cool mode of the CCP when the "Heat/Cool Changeover: Input" is being used to determine the changeover mode and is in the manual state.
0=Heating, 1=Cooling

Heat/Cool Mode: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Heat/Cool Mode: Tracer" property.
0=Heating, 1=Cooling

Heat/Cool Mode: Tracer

Binary

The value, which is communicated by Tracer Summit to the VariTrac II Central Control Panel, that determines the heat cool mode when the "Heat/Cool Changeover: Tracer" property is set to Tracer.
0=Heating, 1=Cooling

This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Heating Stages Enabled: Ref

Property Reference

Specifies the property or constant used to determine the value of the "Heating Stages Enabled: Tracer" property. Range: 0 to 2

Heating Stages Enabled: Tracer

Numeric

The value, communicated by Tracer Summit to the VariTrac II Central Control Panel, limiting the actual number of heating stages that are allowed. Range: 0 to 2

This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Min Calls to Changeover

Numeric

This property indicates the edited minimum opposite calls to changeover. This value can be edited at the VariTrac II Central Control Panel or on the Tracer Summit system. Range: 1 to 4

Min Strong Calls to Changeover

Numeric

This property indicates the edited minimum opposite strong calls to changeover. This value can be edited at the VariTrac II Central Control Panel or on the Tracer Summit system. Range: 1 to 4

Min Time to Changeover

Numeric

This property indicates the edited minimum time to changeover. This value can be edited at the VariTrac II Central Control Panel or on the Tracer Summit system. Range: 10 to 60 minutes

Minimum Supply Flow

Numeric

This is the CCP’s velocity pressure setpoint. It is expressed as a percentage of the air flow measurement taken during calibration. Range is 10% to 95%

Note: This property only applies if "Bypass Control Method: Input" is "Velocity."

Mode: Calibration Active

Binary

Indicates if the CCP is in the process of calibrating its bypass damper and its air flow sensor.
0=No, 1=Yes

Mode: Morning Warmup

Binary

This property indicates if the VariTrac II Central Control Panel is in the morning warmup mode.
0=No, 1=Yes

Mode: Priority Shutdown

Binary

Indicates if the VariTrac II Central Control Panel is in priority shutdown.
0=No, 1=Yes

Note: This property is Yes if: shutdown is sent from the BCU, the Voyager’s high temp input has tripped, the CCP SA Temp input is shorted, or the CCP SA Temp input is open and there’s no Voyager SA temp available.

Mode: Test Mode Active

Binary

This property indicates whether setting eight on DIP switch two (S2) is set to test.
0=No, 1=Yes

Object Identifier

Object ID

Unique hexadecimal identifier of this particular object. This ID is used internally to identify an object.

Object Name

Character

Allows the assignment of a unique printable name to the object for user identification.

Object Type

Object Type

This property designates the object’s type (e.g., VariTrac II CCP System).

Outdoor Air Humidity: Input

Numeric

The value reported by the outdoor air relative humidity input on the economizer module. This property is valid only on units with economizers. Range: 0 to 100% RH

Note: This is a Voyager property.

Outdoor Air Temperature: Input

Numeric

The value reported by the outdoor air temperature sensor on the unit. Range: -40.0 to 150.0°F

Note: This is a Voyager property.

Priority Shutdown: Tracer

Binary

This property indicates the value communicated by Tracer Summit to the VariTrac II Central Control Panel and used to shut down the system. Auto allows the CCP to operate normally. Shutdown instructs the CCP to shut down all mechanical operation immediately.
0=Auto, 1=Shutdown

This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Reference Enthalpy

Numeric

Set by dip switches on the economizer controller and may be used to determine if it is OK to Economize. This property is valid only on units with economizers. Possible values: 19, 22, 25, 28 BTU/lbm

Note: This is a Voyager property.

Return Air Humidity: Input

Numeric

The value reported by the return air relative humidity input on the economizer. This property is valid only on units with economizers. Range: 0 to 100% RH

Note: This is a Voyager property.

Return Air Temperature: Input

Numeric

The value reported by the return air temperature input on the economizer module. This property is valid only on units with economizers. Range: -40.0 to 150.0°F

Note: This is a Voyager property.

SA Flow: Input

Numeric

This property indicates the flow (velocity pressure) measured by the velocity sensor. Range: 0 to 100% of system capacity

Note: This property only applies if "Bypass Control Method: Input" is "Velocity."

SA Pressure Control Band: Local

Numeric

This property indicates the control band the CCP uses when controlling static pressure. Range: 5 to 100% of the system design pressure

Note: This property only applies if "Bypass Control Method: Input" is "Static".

SA Pressure Setpoint: Active

Numeric

This property indicates the actual static pressure setpoint the CCP is using during operation. Units are Inches of Water Column and are determined by multiplying "SA Pressure: Design" by "SA Pressure Setpoint: Local." Range: 90 to 250% of design pressure

Note: This property only applies if "Bypass Control Method: Input" is "Static".

SA Pressure Setpoint: Local

Numeric

This property indicates the locally edited Static Pressure Setpoint and is given in a percentage of design air flow. Range: 90 to 250%The CCP multiplies this number by the design supply air pressure measured during calibration to determine the active supply air pressure setpoint.

Note: This property only applies if "Bypass Control Method: Input" is "Static".

SA Pressure: Design

Numeric

This property indicates the supply air pressure measured during system calibration. Units: Inches of Water Column. Design pressure represents system static pressure with all VAV dampers at Max.

Note: This property only applies if "Bypass Control Method: Input" is "Static".

SA Pressure: Input

Numeric

This property indicates the static pressure measured by the static pressure sensor.Units: Inches of Water Column.

Note: This property only applies if "Bypass Control Method: Input" is "Static".

SA Temperature: Active

Numeric

The supply air temperature currently in use. It is equal to the "SA Temperature: CCP Input" if it has not failed. If this input has failed, it is equal to "SA Temperature: Voyager Input". If both the CCP and Voyager supply air temp inputs have failed, the active supply air temperature is 0.

SA Temperature: CCP Input

Numeric

The temperature being measured by the supply air temperature sensor connected to the CCP.

SA Temperature: Voyager Input

Numeric

The value reported by the supply air temperature sensor connected to the Voyager unit. This sensor value is only available on units with an economizer. Range: -40.0 to 150.0°F

Note: This is a Voyager property.

Security Class

Numeric

Identifies the security class used for access privileges to the given object.

Slave State

Multi-State

The state to which the CCP is controlling the Voyager. The slave states allow the CCP to make the heat/cool and staging decisions for the Voyager unit. The possible slave states are:
0 = Off
1 = Fan on/econ closed
2 = Fan on/econ min
3 = Fan on/econ modulating
4 = Cool 1
5 = Cool 2
6 = Heat 1
7 = Heat 2
8 = Heat 3
9 = NULL
10 = Emergency heat
20 = Fan On

Note: This is a Voyager property.

Software Revision

Numeric

This is the version of the VariTrac II Central Control Panel software.

Spare Output: Tracer

Binary

The state to which the Tracer is controlling the spare binary output.
0=Off, 1=On

Note: This property only influences the state of the spare output if the "Spare Output Control" parameter has been set to ICS at the Central Control Panel. This property is not valid when the CCP System property "Unit Control Source: Tracer" is set to Local.

Supply Fan Status

Binary

If a Voyager is communicating with the CCP, this property indicates the state of the Voyager’s fan. If the Voyager is not communicating, this property indicates the state of binary output 1 on the CCP.
0=Off, 1=On

UCMs[1-16]

Object ID

An array consisting of the VariTrac II CCP VAV UCM object ID’s that are associated with this CCP.

Unit Control Source: Setup

Binary

Determines the value of the "Unit Control Source: Tracer" property.
0=Local, 1=Tracer

Unit Control Source: Tracer

Binary

The value communicated by Tracer Summit to the VariTrac II Central Control Panel that determines whether the Central Control Panel is being controlled locally or by the Tracer Summit system.
0=Local, 1=Tracer

Update Tag

Numeric

Used to indicate that the nonvolatile memory resident data within the particular instance has changed.

Voyager Exists

Binary

Indicates if a Voyager has communicated with the CCP since power was last cycled on the CCP.
0=No, 1=Yes