| Property | Type | Description |
| Abs / Cond Water Temp: Delta | Numeric | This is the cooling water temperature increase from heat transfer in the absorber/condenser section of the chiller. This property only applies to Dragon/Navigator chillers. Range: -255.9 to 255.9 °F (-159.9 to 124.4 °C) |
| Abs / Cond Water Temp: Entering | Numeric | This is the temperature of the cooling water entering the absorber/condenser. This property only applies to Dragon/Navigator chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Abs / Cond Water Temp: Leaving | Numeric | This is the temperature of the cooling water leaving the absorber/condenser. This property only applies to Dragon/Navigator chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Absorber Water Flow Rate | Numeric | This is the rate of cooling water flow through the absorber. This property only applies to Horizon chillers. Range: 0 to 65535 GPM (0 to 4134.6 L/s) |
| Absorber Water Press: Delta | Numeric | This is the total water pressure drop across the absorber and the condenser, which are piped in series. This property only applies to Horizon chillers. Range: 0.0 to 256.0 psid (0.0 to 1765.1 kPad) |
| Absorber Water Temp: Delta | Numeric | This is the temperature change across the absorber of the fluid (usually water) flowing through the absorber. This property only applies to Horizon chillers. Range: -255.9 to 255.9 °F (-159.9 to 124.4 °C) |
| Absorber Water Temp: Entering | Numeric | This is the temperature of the fluid (usually water) entering the absorber. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Absorber Water Temp: Leaving | Numeric | This is the temperature of the fluid (usually water) leaving the absorber. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Alarm Event Class [1-3] | Numeric | This is a three element array containing entries for alarm classes: Informational Warning, Machine Automatic Reset, and Machine Manual Reset. 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 stretchy list of referencer objects (the potential receivers). |
| Alarm Output | Binary | This is the status of the binary output for alarms on the chiller. 0 = Off, 1 = On |
| Aux Heating Valve Position | Numeric | This is the position of the valve controlling the leaving hot water temperature. This property only applies to direct-fired Horizon chillers. Range: -3276.8 to 3276.7% |
| Average Line Voltage | Numeric | This is the average line voltage. This property only applies to Horizon chillers. Range: 0 to 65535 volts |
| Base Load Ch Wtr Setpt: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the base load chilled water setpoint. (This property feeds the "Base Load Ch Wtr Setpt: Tracer" property.) Range: 38.0 to 60.0 °F (3.3 to 15.6 °C) |
| Base Load Ch Wtr Setpt: Tracer | Numeric | This is the base load chilled water setpoint. It will be used as the chilled water setpoint by the chiller when it is in the base loading mode. To relinquish control of this setpoint, a null referencer must be assigned. Range: 38.0 to 60.0 °F (3.3 to 15.6 °C) Default: null referencer |
| Base Loading Request: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the base loading request. (This property feeds the "Base Loading Request: Tracer" property.) 0 = Off, 1 = Auto |
| Base Loading Request: Tracer | Binary | This is used to control the base loading mode of the chiller to auto or off from the Tracer. 0 = Off, 1 = Auto Default: Off |
| Base Loading Status | Binary | This is the active operating status of the base loading mode. 0 = Off, 1 = On |
| Burner Exhaust Temp | Numeric | This is the temperature of the exhaust gas in the exhaust stack. This property only applies to direct-fired chillers. Range: 0.0 to 4095.9 °F (-17.8 to 2257.7 °C) |
| Chilled Water Flow Rate | Numeric | This is the rate of fluid flow through the evaporator. This property only applies to Horizon chillers. Range: 0 to 65,535 GPM (0 to 4134.6 L/s) |
| Chilled Water Flow Status | Binary | This is the active status of the chilled water flow switch input on the chiller. 0 = No, 1 = Yes |
| Chilled Water Pressure: Delta | Numeric | This is the pressure drop across the evaporator of the fluid flowing through the evaporator. This property only applies to Horizon chillers. Range: 0.0 to 256.0 psid (0.0 to 1765.1 kPad) |
| Chilled Water Pump Output | Binary | This is the status of the binary output used to enable and disable the chilled water pump. 0 = Off, 1 = On |
| Chilled Water Reset Type | Multi-State | This is the method the control algorithm in the Horizon chiller uses to reset the leaving chilled water temperature. The algorithm can be calculated based on: 0 = Disabled 1 = Return Chilled Water Temperature 2 = Constant Return Temperature 3 = Outdoor Air Temperature This property only applies to Horizon chillers. |
| Chilled Water Setpoint: Active | Numeric | This is the value to which the chiller is actively controlling the leaving water temperature when it is in the chilled water control mode. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C); 3276.7 °F or °C if not making chilled water. |
| Chilled Water Setpoint: External | Numeric | An optional external analog input can be wired to the Horizon chiller and used for the chilled water setpoint. If the Horizon chiller has this option installed, this is the value being received from that external analog input. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Chilled Water Setpoint: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the chilled water setpoint. (This property feeds the "Chilled Water Setpoint: Tracer" property.) Range: 38.0 to 60.0 °F (3.3 to 15.6 °C) |
| Chilled Water Setpoint: Source | Multi-State | This is where "Chilled Water Setpoint: Active" is being generated. 0 = Front Panel 1 = External Input 2 = Tracer |
| Chilled Water Setpoint: Tracer | Numeric | This is the chilled water temperature setpoint. It will be used as the leaving evaporator water setpoint by the chiller. To relinquish control of this setpoint, a null referencer must be assigned. Range: 38.0 to 60.0 °F (3.3 to 15.6 °C) Default: 44.0 °F (6.7 °C) |
| Chilled Water Temp: Delta | Numeric | This is the temperature change of the fluid flowing through the evaporator. This value is calculated by subtracting the Chilled Water Temp: Leaving value from the Chilled Water Temp: Entering value. Range: -255.9 to 255.9 °F (-159.9 to 124.4 °C) |
| Chilled Water Temp: Entering | Numeric | This is the temperature of the fluid entering the evaporator. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Chilled Water Temp: Leaving | Numeric | This is the temperature of the fluid leaving the evaporator. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Chilled Wtr Pump Request: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the chilled water pump request. (This property feeds the "Chilled Wtr Pump Request: Tracer" property.) 0 = Auto, 1 = On |
| Chilled Wtr Pump Request: Tracer | Binary | This is used to turn the chilled water pump output of the chiller on or place it in the auto mode from the Tracer. 0 = Auto, 1 = On Default: Auto |
| Chiller Enable/Disable: External | Binary | This is the active status of a binary input on the chiller for an external device (typically not a BCU) used to enable and disable the chiller. 0 = Stop, 1 = Auto |
| Chiller Enable/Disable: Tracer | Binary | This is used to place the chiller in auto or stop from the Tracer. 0 = Stop, 1 = Auto Default: (priority arbitrated by Present Value) |
| Chiller Mode | Binary | This is the active operating status of the chiller mode. 0 = Off, 1 = Auto |
| Chiller Run Status | Binary | This is the status of a binary output on the chiller that controls the solution pump. 0 = Off, 1 = On |
| Chiller Run Time | Numeric | This is the accumulated run time of the solution pump since the chiller was installed. Range: 0 to 1,193,046 hours |
| Chiller Starts | Numeric | This is the accumulated number of times the solution pump has been started since the chiller was installed. Range: 0 to 65,535 starts |
| Chiller Type | Multi-State | This is the type of chiller. 0 = Horizon Chiller 1 = Dragon/Navigator Chiller |
| Communication Address | Numeric | This is the assigned communication address of the UCM. |
| Communication Bad Message Count | Numeric | This is the number of message errors that occur when attempting to communicate with the UCM. |
| Communication Channel | Numeric | This is access to the assigned communication channel of the UCM. |
| Communication Error Count | Numeric | This is the number of communication errors that occur when attempting to communicate with the UCM. |
| Communication No Answer Count | Numeric | This is for counts the number of unanswered communications with the UCM. |
| Communication State | Binary | This property indicates the chiller’s communication state. 0 = Down, 1 = Up |
| Cond Water Pump Request: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the condenser water pump request. (This property feeds the Cond Water Pump Request: Tracer property.) 0 = Auto, 1 = On |
| Cond Water Pump Request: Tracer | Binary | This is used to turn the condenser water pump output of the chiller on or place it in the auto mode from the Tracer. To prevent freezing of the chiller, the UCM will not energize the condenser water pump until the chilled water pump is also on. 0 = Auto, 1 = On Default: Auto |
| Condenser Saturated Refrig Temp | Numeric | This is the active status of the condenser refrigerant temperature input on the chiller. Range: -39.9 to 216.0 °F (-39.9 to 102.2 °C) |
| Condenser Water Flow Status | Binary | This is the active status of the water flow switch input on the chiller. 0 = No, 1 = Yes |
| Condenser Water Pump Output | Binary | This property indicates the status of the binary output on the chiller used to control the absorber/condenser water pump. 0 = Off, 1 = On |
| Condenser Water Temp: Delta | Numeric | This is the temperature change across the condenser of the fluid (usually water) flowing through the condenser. This property only applies to Horizon chillers. Range: -255.9 to 255.9 °F (-159.9 to 124.4 °C) |
| Condenser Water Temp: Leaving | Numeric | This pis the temperature of the fluid (usually water) leaving the condenser. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Config: Auxiliary Heating Option | Binary | This is whether the auxiliary heating option is installed. This property only applies to Horizon chillers. 0 = Not Installed, 1 = Installed |
| Config: Unit Type | Multi-State | This is the chiller unit type. 0 = direct-fired 1 = 2-Stage Steam 2 = 2-Stage Hot Water 3 = 1-Stage Steam 4 = 1-Stage Hot Water |
| Control Event Class | Numeric | This determines where control messages are routed when the object’s present value is controlled. |
| Current Draw | Numeric | This is the percent of the maximum rated load amps (%RLA) the Horizon chiller is actively drawing. This property only applies to Horizon chillers. Range: 0.0 to 4095.9% |
| Current Imbalance | Numeric | This is the current imbalance based on calculations using the three values for the Phase Current Draw property. This property only applies to Horizon chillers. Range: 0.0 to 6553.5% |
| Diag: Automatic Reset | Binary | This is when a diagnostic exists which takes part or all of the chiller off-line. When the condition causing this diagnostic is fixed, the diagnostic will automatically be reset. 0 = None Detected, 1 = Yes |
| Diag: Information Warning | Binary | This is when a diagnostic exists which informs or warns but does not cause the chiller to stop running. 0 = None Detected, 1 = Yes |
| Diag: Manual Reset Required | Binary | This is when a diagnostic exists which causes the chiller to shut down. The chiller remains off-line until a reset is initiated. Reset can be initiated at the chiller front panel or in the Tracer Summit Horizon Absorption Chiller editor using the clear diagnostic function. The following list of diagnostics may not be remotely reset: Phase Loss (E4) Phase Reversal (E5) High Pressure Cutout Compressor A (F5) Low Evaporator Refrigerant Temperature (FB) Emergency Stop (FD) High Direct Fired Generator Temperature Cutout (3BE) Burner Alarm (3C7) Low Temp Solution Pump AFD Fault (598) Absorber Pump AFD Fault (599) 0 = None Detected, 1 = Yes |
| Diagnostic Condition | Multi-State | This is the diagnostic which is active on the chiller. |
| Diagnostic Condition: History[1-20] | Multi-State | This is an array of the last twenty diagnostics to occur. |
| Diagnostic Date/Time Stamp Hist [1-20] | Date/Time Numeric | This is an array of the date and time of each of the last twenty diagnostics to occur. Range: 0 to 4,294,967,295 seconds, seconds since midnight 01/01/1980 |
| Dilute Soln Temp Lvg Absorber | Numeric | This is the active temperature of the water/lithium-bromide solution leaving the absorber. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Emergency Stop: External | Binary | This is the active status of a binary input to the chiller, which allows an external device to completely shut down the chiller on an immediate/emergency basis. 0 = Auto, 1 = Stop |
| Energy Valve Commanded Position | Numeric | This is the command being sent to the energy valve actuator. Range: 0.0 to 6553.5% |
| Energy Valve Motor Position | Numeric | This is the active status (in % open) of the motor that controls the valve in line to the generator (hot water or steam). Range: 0.0 to 6553.5% |
| Evaporator Saturated Refrg Temp | Numeric | This is the refrigerant temperature measured on the discharge side of the evaporator. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Generator Hot Water Temp: Ent | Numeric | This is the temperature of the hot water entering the generator when the Horizon chiller energy source is hot water. This property only applies to 1-stage hot water and 2-stage hot water Horizon chillers. Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Generator Hot Water Temp: Lvg | Numeric | This is the temperature of the hot water leaving the generator when the Horizon chiller energy source is hot water. This property only applies to 1-stage hot water and 2-stage hot water Horizon chillers. Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Hot Water Control Status | Binary | This is the active operating status of the hot water control mode. 0 = Off, 1 = On |
| Hot Water Setpoint: Active | Numeric | This is the value to which the chiller is actively controlling the water temperature leaving the heating bundle when the chiller is in the hot water control mode. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C); 3,276.7 °F or °C if not making hot water |
| Hot Water Setpoint: External | Numeric | This is the value of an analog input to the Horizon chiller from an external device that can define the hot water setpoint. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Hot Water Setpoint: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the hot water setpoint. (This property feeds the "Hot Water Setpoint: Tracer" property.) This property only applies to direct-fired chillers. Range: 140.0 to 180.0 °F (60.0 to 82.2 °C) |
| Hot Water Setpoint: Source | Multi-State | This is where Hot Water Setpoint: Active is being generated. 0 = Front Panel 1 = External Input 2 = Tracer |
| Hot Water Setpoint: Tracer | Numeric | This is the hot water temperature setpoint. It will be used in the hot water control mode. To relinquish control of this setpoint, a null referencer must be assigned. This property only applies to direct-fired chillers. Range: 140.0 to 180.0 °F (60.0 to 82.2 °C)Default: null referencer |
| Hot Water Temp: Delta | Numeric | This is the difference between the hot water temperature entering and leaving the auxiliary heat exchanger. This value is calculated by subtracting the Hot Water Temp: Entering value from the Hot Water Temp: Leaving value. This property only applies to direct-fired Horizon chillers. Range: -255.9 to 255.9 °F (-159.9 to 124.4 °C) |
| Hot Water Temp: Entering | Numeric | This is the temperature of the hot water entering the auxiliary heat exchanger. This property only applies to direct-fired Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Hot Water Temp: Leaving | Numeric | This is the temperature of the hot water leaving the auxiliary heat exchanger. This property only applies to direct-fired Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| ICS Operating Mode: Active | Multi-State | This is the Tracer Summit active control mode. 0 = Unoccupied 1 = Optimal Start 2 = Occupied 3 = Optimal Stop 4 = Demand Limit 5 = Duty Cycle 6 = Priority Shutdown 7 = Night Economize 8 = Night Heat Cool |
| Interstage Pressure Relief Req | Binary | This is the status of the binary output on the chiller which indicates a request for interstage pressure relief. This property only applies to 2-stage hot water, 2-stage steam, and direct-fired Horizon chillers, and 2-stage steam and direct-fired Dragon/Navigator chillers. 0 = Off, 1 = On |
| Interstage Solution Temp Ent LTG | Numeric | This is the active temperature of the interstage water / lithium-bromide solution as it enters the low temperature generator (LTG). Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Interstage Solution Temp Lvg HTG | Numeric | This is the temperature of the interstage water / lithium-bromide solution as it leaves the high temperature generator (HTG). Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Interstage Vapor Pressure | Numeric | This is the pressure of the water vapor driving the second stage. Range: -14.9 to 241.0 psig (-102.7 to 1661.6 kPa) |
| Interstage Vapor Temp | Numeric | This is the saturation temperature of the refrigerant leaving the high temperature generator (HTG). Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Intmd Temp At Absorber Spray | Numeric | This is the temperature of the intermediate water / lithium-bromide solution at the absorber spray tree. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Last Control Date Time | Date/Time Numeric | This is the date and time recorded at the last control of the present value. Its value is updated when an attempt to control occurs and 1] a priority change occurs (up or down), OR 2] a change in the commandable property value occurs (e.g., OCCUPIED to UNOCCUPIED), OR, 3] a change in the priority owner occurs and the priority level stays the same. |
| LiBr Crystallization Margin | Numeric | This is the margin of safety between normal operation and sensing detecting and recovery (SDR). Range: -128.0 to 127.0 °F (-88.9 to 52.8 °C) |
| Limit Warning Output | Binary | This is the status of a binary output on the chiller which is typically wired to an external device (i.e., an alarm) that lets an operator know when the chiller is in the limit mode. 0 = Off, 1 = On |
| Minimum Off Time | Numeric | This is the minimum off time assigned to the UCM. This value serves to protect the hardware from cycle times that might harm it. Range: 0 to 120 minutes |
| Minimum On Time | Numeric | This is the minimum on time assigned to the UCM. This value serves to protect the hardware from cycle times that might harm it. Range: 0 to 120 minutes |
| Minimum Time Remaining | Numeric | This is the minimum time remaining (if any) of a minimum On/Off time control action for the UCM. Range: 0 to 120 minutes |
| Object Identifier | Object ID | This uniquely identifies a particular object. |
| Object Name | Character | This allows the assignment of a unique printable name to the object for user identification. |
| Object Type | Object Type | This designates the object’s type (i.e., analog input, binary input, TCM, PCM, etc.). |
| Operating Mode During Diagnostic | Multi-State | This is the operating mode of the chiller when the last diagnostic was recorded. |
| Operating Mode: Unit | Multi-State | This is the active operating mode of the chiller (or last operating mode if a diagnostic is active). |
| Outdoor Air Temperature: Active | Numeric | This is the active outdoor air temperature. This property only applies to Horizon chillers. Range: -39.9 to 216.0 °F (-39.9 to 102.2 °C) |
| Outdoor Air Temperature: Input | Numeric | This is the value of an analog input on the Horizon chiller which is wired to an optional outdoor air temperature sensor. This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Outdoor Air Temperature: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the outdoor air temperature. (This property feeds the "Outdoor Air Temperature: Tracer" property.) This property only applies to Horizon chillers. Range: -39.9 to 125.0 °F (-39.9 to 51.7 °C) |
| Outdoor Air Temperature: Tracer | Numeric | This is an outdoor air temperature to the chiller. The chiller will display this value on the human interface and could use it for chilled water reset. A null referencer must be assigned if the chiller is to use its local sensor for these functions. This property only applies to Horizon chillers. Range: -39.9 to 125.0 °F (-39.9 to 51.7 °C) Default: null referencer |
| Phase Current Draw [1-3] | Numeric | This property is the percent of the maximum rated load amps (%RLA) each of the three phases is actively drawing. This property only applies to Horizon chillers. Range: 0.0 to 4095.9% |
| Phase Voltage [1-3] | Numeric | This arrayed property is the voltage for each of the three phases of the power input. This property only applies to Horizon chillers. Range: 0 to 65535 volts |
| Present Value | Multi-State | This is used to control the chiller to one of nine standard operation modes. These modes are defined as Unoccupied, Optimal Start, Occupied, Optimal Stop, Demand Limit, Duty Cycle, Priority Shutdown, Night Economize, and Night Heat-Cool. A translation (within the BCU) takes place to map these modes into a simpler mode set. |
| Product ID | Multi-State | This is the product specific to the implementation. For the Horizon and Dragon/Navigator chillers the product ID will be "Absorption Chiller." |
| Purge Mode | Multi-State | This is the purge operating mode of the chiller UCM. 0 = Stop 1 = On 2 = Auto 4 = Service |
| Purge Pump Running Time | Numeric | This is the accumulated running time of the purge pump over the lifetime of the Horizon chiller. This property only applies to Horizon chillers. Range: 0 to 1,193,046 hours |
| Purge Status | Multi-State | This is the active operating mode of the purge unit: 0 = Standby 1 = Ready to Pump Out 2 = Pumping Out of Condenser 3 = Inhibited by Low Condenser Temp 4 = Service Pumpout 6 = Inhibited by High Condenser Temp 10 = Diagnostic Alarm 11 = Pumping Out of Absorber This property only applies to Horizon chillers. |
| Purge: Pumpout Rate | Numeric | This is the total pumpout time for the previous 24 hours. This property only applies to Horizon chillers. Range: 0.0 to 1440.0 minutes/24 hours |
| Purge: Pumpout Rate, Maximum | Numeric | This is the purge pumpout rate at which an information warning (IFW) alarm will be initiated. This property only applies to Horizon chillers. Range: 0 to 255 minutes/24 hours |
| Purge: Total Pumpout Time | Numeric | This is the total accumulated pumpout time for the purge unit over its lifetime. This property only applies to Horizon chillers. Range: 0 to 71,582,760 minutes |
| SDR Temperature | Numeric | This is the sensing detecting and recovery temperature. This temperature is used to indicate the presence of a crystallization blockage in the low temperature heat exchanger (LTHX). Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| SDR Trip Temperature | Numeric | This is the temperature at which the SDR Temperature will cause a sensing detecting and recovery (SDR) event. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Setpoint Source Override | Multi-State | This is if the chilled water setpoint source selection is being overridden at the front panel. This property only applies to Horizon chillers. 0 = No Override 1 = Front Panel Only 2 = Use Default Setpoint Source |
| Soln Concentration Entering Abs | Numeric | This is the concentration of the lithium-bromide (LiBr) solution leaving the heat exchanger and entering the absorber. This property only applies to 2-stage chillers. Range: 0.00 to 655.35% |
| Soln Concentration Leaving HTG | Numeric | This is the concentration of the lithium-bromide (LiBr) solution leaving the high temperature generator (HTG). This property only applies to 2-stage chillers. Range: 0.00 to 655.35% |
| Soln Concentration Leaving LTG | Numeric | This is the concentration of the lithium-bromide (LiBr) solution leaving the low temperature generator (LTG). Range: 0.0 to 655.35% |
| Solution Pump Speed | Numeric | This is the solution pump speed. Range: -327.68 to 327.67% |
| Solution Temp Ent Level Control | Numeric | This is the temperature of the concentrated solution leaving the high temperature heat exchanger (HTHX). This property only applies to Horizon chillers. Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Solution Temp Ent LTHX, Mixed | Numeric | This is the temperature of the mixture of concentrated solution and intermediate solution entering the low temperature heat exchanger (LTHX). This property only applies to Horizon chillers. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Solution Temp Entering Absorber | Numeric | This is the temperature of the water/lithium-bromide solution entering the absorber. Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Solution Valve Position | Numeric | This is the position of the solution valve (in % open). This property only applies to Dragon/Navigator chillers. Range: -3276.8 to 3276.7% |
| Steam Condensate Temp Lvg LTG | Numeric | This is the temperature of the steam condensate leaving the low temperature generator (LTG). This property only applies to 1-stage steam and 2-stage steam Horizon chillers. Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Steam Pressure: Generator | Numeric | This is the steam pressure downstream of the energy valve. This property only applies to 1-stage steam and 2-stage steam absorption chillers. Range: -14.9 to 241.0 psig (-102.7 to 1661.6 kPa) |
| Steam Pressure: Supply | Numeric | This is the steam pressure upstream of the energy valve. This property only applies to 1-stage steam and 2-stage steam chillers. Range: -14.9 to 241.0 psig (-102.7 to 1661.6 kPa) |
| Steam Temp Entering Generator | Numeric | This is the steam supply temperature. This property only applies to 2-stage steam chillers. Range: 0.0 to 512.0 °F (-17.7 to 266.7 °C) |
| Strong Soln Temp Lvg LTG | Numeric | This is the active temperature of the strong water / lithium-bromide solution leaving the low temperature generator (LTG). Range: 0.0 to 256.0 °F (-17.8 to 124.4 °C) |
| Tons: Active | Numeric | This is the approximate active cooling capacity in tons being produced by the Horizon chiller (calculated by the Horizon chiller). This property only applies to Horizon chillers. Range: 0 to 65,535 tons |
| Tracer Comm Packet Revision | Numeric | This is the current communication packet revision. |
| Tracer Controlled Relay: Ref | Referencer | This is the value used by the BCU to determine which value to communicate to the chiller as the Tracer controlled relay request. (This property feeds the "Tracer Controlled Relay: Tracer" property.) 0 = Off, 1 = On |
| Tracer Controlled Relay: Tracer | Binary | This is used to turn the Tracer controlled relay of the Horizon chiller on or off from the Tracer. This property only applies to Horizon chillers. 0 = Off, 1 = On Default: Off |
| Tracer Temperature Sensor | Numeric | This is the value of an analog input on the Horizon chiller which can be used to measure any miscellaneous temperature. This property only applies to Horizon chillers. Range: -39.9 to 216.0 °F (-39.9 to 102.2 °C) |
| Unit Function | Multi-State | This is the operating mode of the chiller. This property only applies to direct-fired chillers. 0 = Cooling 1 = Heating 2 = Cooling Priority 3 = Heating Priority |
| Unit Function: Ref | Multi-State | This is the value used by the BCU to determine which value to communicate to the chiller as the operating mode of a direct-fired Horizon chiller with the optional auxiliary heating bundle. (This property feeds the "Unit Function: Tracer" property.) This property only applies to direct-fired Horizon chillers. 0 = Cooling 1 = Heating 2 = Cooling Priority 3 = Heating Priority |
| Unit Function: Tracer | Multi-State | This is the operating mode of a direct-fired Horizon chiller with the optional auxiliary heating bundle. This property only applies to direct-fired Horizon chillers. 0 = Cooling 1 = Heating 2 = Cooling Priority 3 = Heating Priority Default: Cooling |
| Update Tag | Numeric | This is the upload/download tag property. Its purpose is to keep the PC Workstation and BCU copies of the object instance in synchronization. |
| Voltage Imbalance | Numeric | This is the percentage of voltage imbalance among the three phases serving the unit based on calculations using the three values for the Phase Voltage property. This property only applies to Horizon chillers. Range: 0.0 to 6553.5% |