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GRAMMABLEup to 3-heat& 2-coolHEATCOOLControl up to 3 Heat &2 Cool Stages3 Configurable OutputsAdjustable 2nd & 3rd StageTimers & DeadbandsBacklit Display & ButtonLegendsAux Heat IndicatorSet Point LimitingHEATPUMPOutdoor Sensor Ready withHigh/Low Readouts for the DayAccepts EZ ProgrammerAccepts Optional HumidityModule: Controls Humidificationand DehumidificationAccepts Optional IRRemote ControlAccepts Comfort CallPhone Control AccessoryMeets Commercial California Title 24Use with most Air Conditioning & Heating Systems including: 1 or 2 StageElectric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.OWNER’SMANUALVenstar Inc. 08/07
CAUTIONFollow the Installation Instructions before proceeding.Set the thermostat mode to “OFF” prior to changingsettings in setup or restoring Factory Defaults.CAUTIONNEVER PUT MORE THAN ONEJUMPER ON THE SAME MISCJUMPER BLOCK!THIS MAY DAMAGE YOURTHERMOSTAT.MISC3MISC3OKNOTE: Due to variations in environmental conditions, it is notalways possible to achieve the desired humidification ordehumidification setpoint.This device complies with Part 15 of the FCC Rules. Operation issubject to the following two conditions: (1) this device may not causeharmful interference, and (2) this device must accept any interferencereceived, including interference that may cause undesired operation.ThermostatT2800cFCTested to Complywith FCC StandardsFOR HOME OR OFFICE USEPage i
How to Use This ManualThe Table of Contents divides the thermostat features into sectionsmaking it easier to quickly find information.The first page of each section contains a more detailed list of the contentswithing that section, such as the example page shown below.SECTION 14Timers and DeadbandsHeader shows section #and title of sectionSection 14 Contents:Adjusting the Heat/CoolDifferential.14.2Adjusting the CyclesPer Hour.14.3Adjusting the Deadband.14.4Adjusting the Minutes ofRun-Time Before the14Next Stage.14.6Selecting 2nd Stage TurnOff Temperature.14.7Section contentsVisible section tabon the side of thepageSection and page #Page 14.1In addition, this manual also has an Index to help you find any informationregarding this thermostat quickly.Page ii
Glossary of TermsAuto-Changeover: A mode in which the thermostat will turn onthe heating or cooling based on room temperature demand.Configurable Output Jumper: Using jumpers on the thermostatyou can configure the MISC1, MISC2, and MISC3 terminals tocontrol humidification, dehumidification, 2nd stage cooling, and3rd stage heating.Cool Setpoint: The warmest temperature that the space shouldrise to before cooling is turned on (without regards todeadband).Deadband: The number of degrees the thermostat will wait, oncesetpoint has been reached, before energizing heating or cooling.Dehumidify: To reduce the amount of moisture in the air.Differential: The forced temperature difference between theheat setpoint and the cool setpoint.Heat Setpoint: The coolest temperature that the space shoulddrop to before heating is turned on (without regards todeadband).Humidify: To increase the amount of moisture in the air.Icon: The word or symbol that appears on the thermostatdisplay.Mode: The current operating condition of the thermostat (i.e. Off,Heat, Cool, Auto, Program On).Non-Programmable Thermostat: A thermostat that does nothave the capability of running the Time Period Programming.Programmable Thermostat: A thermostat that has the capabilityof running the Time Period Programming.Temperature Swing: Same as Deadband.Time Period Programming: A program that allows thethermostat to automatically adjust the heat setpoint and/or thecool setpoint based on the time of day.Page iii
Table of Contents123Basic Operation4Viewing Temperatureand Humidity Sensors 5Programming the6Daily ScheduleProgramming the7Fan OperationThermostat ewing Equipment11Run-TimesElectric Heat and12Heat Pump OperationTimers and Deadbands 13Energy Save14OperationProgramming the Run15Time AlertsProgramming the16Holiday ModeConfiguring the MISC17OutputsFactory Defaults,Calibration, and Sensors 18Accessories19Advanced Setup Table 20Quick StartGetting to Know YourThermostatSetting Clock and DayPage iv
SECTION 1Quick Start1Section 1 Contents:Setting the Clock and Day.1.2Selecting the Heat or CoolMode.1.3Selecting Your DesiredTemperature.1.4Using the Fan Button.1.4Note: Following the instructions in this section will allow you tooperate your thermostat using the factory default settings. Thesesettings are depicted in the illustrations throughout this manual.Page 1.1
MODE1HUMIDITYSET CLOCKPress the MODE andHUMIDITY buttonsat the same timeSetting the ClockI2:00AmSetupDuring Setup & Programming:Pressing the UP or DOWNbuttons will modify the flashingselection.ITo adjust theClock or Day usePressSetting the DayMODESetupSuPress the MODEand HUMIDITYbuttons at thesame time toreturn to normaloperation.MODE2HUMIDITYSET CLOCKPage 1.2Buttons.To adjust the time byhours press and holdthe FAN button whilepressing the UP orDOWN buttons.
1Selecting the Heat or Cool ModeSelect Mode by Pressing the MODE ButtonHeating OnlyThe HEAT setting indicates thetemperature the room has toreach before the furnace willturn on to heat the room.Cooling OnlyThe COOL setting indicates thetemperature the room has toreach before the air conditionerwill turn on to cool the room.Heating or CoolingAUTO will automatically selectheat or cool based on roomtemperature demand.Time Schedule forHeating or CoolingProgram On will activate thestored timer operation for theheating and coolingsetpoints. (occupied orunoccupied periods)OffOFF indicates both heatingand air conditioningsystems are turned off.I2:00Su70 687670 7670 687670 COOLAUTOHEATI2:00SuPmProgram OnPressMODECOOLoccupiedI2:00SuOFFPmPage 1.3HEATPressMODE
Selecting Your Desired Temperature1(adjusting the setpoints)AUTO OR PROGRAM MODEPressing the UP or DOWN buttons in Auto or Program modewill adjust both the heat and cool set temperaturessimultaneously.I2:00SuAdjust the desiredset temperature with the7670 68PmCOOLAUTOHEATbuttons.HEAT OR COOL MODEPressing the UP or DOWN buttons in Heat or Cool mode willadjust only the heat or cool set temperature.I2:00Su70PmAdjust the desiredset temperature with the76COOLbuttons.Using the Fan ButtonI2:00SuPress7670 68PmCOOLAUTOHEATFanOnFANFan On indicates constant fan operation.If Fan On is selected the fan will runcontinuously at all times, except in Off,and will only run if there is a heating orcooling demand in Unoccupied periods.Pressing the FAN button toggles thisfeature on or off.Page 1.4
SECTION 2Getting to Know Your Thermostat2Section 2 Contents:Front Panel Buttons.2.2Display Features.2.3Page 2.1
Front PanelWarmer Button(glows red)Backlit LCD DisplayI2:00PmSu2[]sometimes referredto as the UP button74COOLAUTO72HEATCooler Button(glows blue)Heat or Cool Demand Indicator OverrideButtonRed Heat, Green CoolPLATINUM[eriesCOMMERCIAL PROGRAMMABLE PROGRAM HOLIDAY OVERRIDESET CLOCKOUTDOORQUICK RELEASE FORACCESSORY PORT(pg. 19.1)MODEHUMIDITYFANPROGRAM HOLIDAYOUTDOORSET CLOCKPage 2.2]sometimes referred to as theDOWN button
1 Display Features2I8:8888I88 88Am Program On SetupPm StartStopHISuMoTuWeThFrSa DeHumidifyService FilterUV XHEATLOMode Indicators - Section 4Selects the operational mode of the equipment.HEAT - Indicates the heating mode.COOL - Indicates the air conditioning mode.AUTO - Indicates the system will automatically changeoverbetween heat and cool modes as the temperature varies.OFF - Indicates heating and cooling is turned off.PROGRAM ON - Indicates the time period program is enabled torun.Clock with Day of the Week - Section 3Indicates the current time and day. This clock is also used to programthe time period schedule.Room Temperature Display - Section 5Indicates the current room temperature and displays the outdoortemperature when selected.Desired Set Temperature - Section 4/5Indicates desired room temperature(s). Also displays the dailyhighest and lowest outdoor temperatures.Outside icon - Section 5Indicates the temperature displayed is from the optional outdoorsensor.Page 2.3
Display Features2288I8:88I88 88Am Program On SetupPm StartStopHISuMoTuWeThFrSa DeHumidifyService FilterUV deFanOnOccupied & Unoccupied icons - Section 6Indicates the program number: Occupied 1,2,3,or Unoccupied.Override icon - Section 6Indicates the program is currently being overridden for up to 4 hours.Setup icon - Sections 7-15Indicates the thermostat is in the setup mode.Fan On icon - Section 7Indicates constant, continuous fan operation. When Fan On is notlit - indicates the fan will only operate when necessary to heat or tocool.Service Filter icon - Section 15Appears when the filter should be serviced under normal conditions.Adjustable from 0 - 1950 hours of blower operation.icon - Section 8Indicates keypad has been locked.StartStop icon - Section 6Appears when programming occupied time periods.Page 2.4
Display Features2UV Light icon - Section 11/15Appears when the UV bulb should be serviced under normalconditions. Adjustable from 0 - 1950 days of operation.AuxHeat icon - Section 12Indicates 2nd stage electric strip heat is being used when the thermostat is programmed for Heat Pump operation. Only the Aux iconwill appear during Cool to Dehumidify to indicate Reheat operation.Humidify/DeHumidify icon - Sections 9-10Indicates the system is currently humidifying/dehumidifying the air.Lo icon - Section 5Indicates the lowest recorded outdoor temperature for the day.Hi icon - Section 5Indicates the highest recorded outdoor temperature for the day.Page 2.5
SECTION 3Setting the Clock and Day3Section 3 Contents:Setting the Clock.3.2Setting the Day.3.2Note: During setup & programming pressing the UP or DOWNbuttons will modify the flashing selection.Page 3.1
MODEHUMIDITYSET CLOCKPress the MODE andHUMIDITY buttonsat the same time3Setting the ClockI2:00AmSetupDuring Setup & Programming:Pressing the UP or DOWNbuttons will modify the flashingselection.ITo adjust theClock or Day usePressSetting the DayMODESetupSuPress the MODEand HUMIDITYbuttons at thesame time toreturn to normaloperation.MODE2HUMIDITYSET CLOCKPage 3.2Buttons.To adjust the time byhours press and holdthe FAN button whilepressing the UP orDOWN buttons.
SECTION 4Basic Operation4Section 4 Contents:Programming for Auto orProgram Operation.4.2Selecting the ProperOperating Mode.4.3Selecting Your DesiredTemperature.4.8Note: During setup & programming pressing the UP or DOWNbuttons will modify the flashing selection.Page 4.1
Programmable or Non-ProgrammableThermostat4When the very simplest operation is desired, this thermostatmay be configured to be non-programmable, with or withoutAuto-Changeover. Follow the step below.If ‘NO’ is selected, the thermostat will lockout the Program On screen;only the Off, Heat, Cool, and Auto screens may be accessed bypressing the MODE button.Select ‘YES’ if you would like your thermostat to be programmable,then the Program mode will be accessible through the use of theMODE button.MODEPROGRAMPress the MODE button. While holdingthe MODE, press the PROGRAMbutton to enter Setup screens.Program On SetupYESSelect Yes if you would likethe thermostat to be programmable or No for non-programmable.Note: Press the MODEbutton momentarilyto move through thesetup screens. Pressand hold the MODEbutton to move backwards through thesetup screens.iPressNOPROGRAMPress the PROGRAM button to leave the Setup screens. If no buttons arepressed, the display will leave the setup screens after 30 seconds.Page 4.2
Manual or Auto-ChangeoverThermostatWhen the very simplest operation is desired, this thermostat maybe configured to be a manual heat and cool thermostat, with orwithout time period programmability. Follow the step below.4The thermostat may be programmed to function as a Heat Only orCool Only thermostat by selecting ‘NO’ in the setup screen below.This will lockout the Auto-Changeover screen and only allow the Off,Heat, Cool, and Program On screens to be accessed.MODEPROGRAMMODEPress the MODE button. While holdingthe MODE, press the PROGRAMbutton to enter Setup screens.Note: Press the MODEbutton momentarilyto move through thesetup screens. Pressand hold the MODEbutton to move backwards through thesetup screens.Press the MODE button repeatedlyuntil this setup screen appears.SetupYESSelect Yes if you wouldlike the thermostat tobe Auto-Changeover orNo for a Heat Only andCool Only Thermostat.2AUTOPressNOPROGRAMPress the PROGRAM button to leave the Setup screens. If no buttons arepressed, the display will leave the setup screens after 30 seconds.Page 4.3
Operating Mode when the Thermostatis Configured to be:4NON-PROGRAMMABLE WITH MANUAL-CHANGEOVER - If thethermostat is configured to be a non-programmable thermostat withManual-Changeover, the following screens will be available bypressing the MODE button.Select the Mode by Pressing the MODE ButtonHeating OnlyThe HEAT setting indicates thetemperature the room has toreach before the furnace willturn on to heat the room.Cooling OnlyThe COOL setting indicates thetemperature the room has toreach before the air conditionerwill turn on to cool the room.OffOFF indicates both heatingand air conditioningsystems are turned off.I2:00Su70 ge 4.4PressMODE
Operating Mode when the Thermostatis Configured to be:NON-PROGRAMMABLE WITH AUTO-CHANGEOVER - If thethermostat is configured to be a non-programmable thermostatwith Auto-Changeover, the following screens will be available bypressing the MODE button4Select the Mode by Pressing the MODE ButtonHeating OnlyThe HEAT setting indicates thetemperature the room has toreach before the furnace willturn on to heat the room.Cooling OnlyThe COOL setting indicates thetemperature the room has toreach before the air conditionerwill turn on to cool the room.Heating or CoolingAUTO will automatically selectheat or cool based on roomtemperature demand.OffOFF indicates both heatingand air conditioningsystems are turned off.I2:00Su70 6876707670 COOLAUTOHEATI2:00SuOFFPmPage 4.5PressMODE
Operating Mode when the Thermostatis Configured to be:PROGRAMMABLE WITH MANUAL-CHANGEOVER - If the thermostat isconfigured to be a programmable thermostat with Manual-Changeover, the4 following screens will be available by pressing the MODE button.Select the Mode by Pressing the MODE ButtonHeating OnlyThe HEAT setting indicates thetemperature the room has toreach before the furnace willturn on to heat the room.Cooling OnlyThe COOL setting indicates thetemperature the room has toreach before the air conditionerwill turn on to cool the room.I2:00SuHEATI2:00SuPressMODEPmCOOLTime Schedule forHeating OnlyThe HEAT Program On settingwill activate the time periodprogram for the heatingsetpoint ONLY (occupied orunoccupied periods).I2:00SuTime Schedule forCooling OnlyThe COOL Program On settingwill activate the time periodprogram for the coolingsetpoint ONLY (occupied orunoccupied periods).I2:00SuOffOFF indicates both heatingand air conditioningsystems are turned off.70 68767070 68767070PmPmoccupiedPmPressMODEProgram OnHEATPressMODEProgram OnCOOLoccupiedI2:00SuOFFPmPage 4.6PressMODE
Operating Mode when the Thermostatis Configured to be:PROGRAMMABLE WITH AUTO-CHANGEOVER - If the thermostat isconfigured to be a programmable thermostat with Auto-Changeover,the following screens will be available by pressing the MODE button.4Select the Mode by Pressing the MODE ButtonHeating OnlyThe HEAT setting indicates thetemperature the room has toreach before the furnace willturn on to heat the room.Cooling OnlyThe COOL setting indicates thetemperature the room has toreach before the air conditionerwill turn on to cool the room.Heating or CoolingAUTO will automatically selectheat or cool based on roomtemperature demand.Time Schedule forHeating or CoolingProgram On will activate thetime period program for theheating and coolingsetpoints. (occupied orunoccupied periods)OffOFF indicates both heatingand air conditioningsystems are turned off.I2:00Su70 687670 7670 687670 COOLAUTOHEATI2:00SuPmProgram OnPressMODECOOLoccupiedI2:00SuOFFHEATPressPmPage 4.7MODE
Selecting Your Desired Temperature (adjusting setpoints)4AUTO OR PROGRAM MODEPressing the UP or DOWN buttons in Auto or Programmodes will adjust both the heat and cool set temperaturessimultaneously. For more information on this see page 13.2.I2:00Su7670 68PmAdjust the desiredset temperature with theCOOLAUTOHEATbuttons.HEAT OR COOL MODEPressing the UP or DOWN buttons in Heat or Cool modes willadjust only the heat or cool set temperature.I2:00Su70Pm76Adjust the desiredset temperature with theCOOLbuttons.Note: Due to the Random Start feature there will be a 2 to 30 second delaybefore heating or cooling may be energized. This delay helps to keepmultiple thermostats from energizing their outputs at the same timeafter a power outage.Page 4.8
SECTION 5Viewing the Temperature and Humidity Sensors5Section 5 Contents:Viewing the OutdoorTemperature.5.2Viewing the IndoorHumidity.5.3Page 5.1
Viewing the Outdoor TemperatureRequires an outdoor sensor (optional accessory) to be installed. Toread the temperature from the outdoor sensor, press the PROGRAMand HOLIDAY buttons. The display will then show the current outdoortemperature along with the highest and lowest temperatures for the day.5PROGRAM HOLIDAYOUTDOORThe highest and lowesttemperatures for the daywill be displayed alongwith the current outdoortemperature.This reading is from thesensor connected to RS2.Press the PROGRAMbutton. While holdingPROGRAM, press theHOLIDAY button to viewthe Outdoor temperature.92High temperaturefor the day.OutsideCurrent outdoortemperature.83 68HILOLow temperaturefor the day.Press the PROGRAMPROGRAM HOLIDAYbutton. While holdingOUTDOORPROGRAM, press theHOLIDAY button to leavethe Outdoor temperaturescreen.Note: If no sensors are connected 2 dashes [- -] will appear on the display.One wired or wireless Outdoor sensor can be installed to read the outdoortemperature (RS2).The Outdoor Sensor measures outdoor air temperature and sends this informationto the thermostat; it measures temperature with a range of -40 to 127 F.The Outdoor Sensor should be connected to the thermostat using solid conductorCAT 5, CAT 5e, or CAT 6 type network communication cable. This is an unshieldedcable with four twisted pairs of 24 gauge solid wire; DO NOT use stranded cable.The cable length should not exceed 250 feet. If less than 75 feet of cable isrequired to connect the thermostat to the Outdoor Sensor, a three conductorthermostat cable (18-24 gauge) may be used; this cable is NOT suitable for anylength greater than 75 feet.IMPORTANT: Do no use shielded wire. Do not run run sensor wiring in the sameconduit as the 24VAC thermostat wiring. Electrical interference may cause thesensor to give incorrect temperature readings. See the Outdoor Sensorinstructions for further details.Page 5.2
Viewing the Indoor HumidityRequires the Humidity Module (optional accessory) to be installed.To display the current humidity at t
reach before the air conditioner will turn on to cool the room. Cooling Only OFF indicates both heating and air conditioning systems are turned off. Off AUTO w i lau tom cy s e heat or cool ba
