Trane LS-90 User's Manual
Contents
1.2. stage HEAT or heat pump auxiliary heat W3 W3 3rd stage HEAT or 2nd stage of 2 stage auxiliary heat A 3rd wire for zoned hot water heat see zoned systems pg14 Y Y COOL control or 1st stage compression for heat pump Y2 Y2 2nd stage COOL control or 2nd stage compression for a heat pump GorF G FAN control C Common 24VAC power to power thermostat NOTE TRANE uses B for this connection n a Emergency heat do not connect tape off n a System monitor do not connect tape off n a Outdoor sensor do not connect tape off External Humidifier DH External De Humidifier EX External fresh air baffle B or B Heat pump changeover cool to heat powered in heat oO O Heat pump changeover heat to cool powered in cool B and O A IMPORTANT If there are both B and O wires Trane pump products DO NOT CONNECT B to B terminal connect B to C terminal If not a Trane product tape off B Lennox Heat Pump VorVRorR RH Power for HEAT M or Y Y Y or W or W2 W2 ForG G RorO OX or X2 or C Trane Products American Standard B C W or W1 or X2 W2 14 Zoned Systems Reference Your Wires Radio Thermostat Terminal 2 wire Zoned Hot Water R RH W W 3 Wire Zoned Hot Water Motor Driven Valves Ror5 RH power Wor4 W heat ON YorGor6 the 3rd wire A heat OFF 3 Wire Zoned Hot Water Solenoid Valves R RH power W heat ON A Y or G the 3rd wire W heat OFF Notes on your system Customer support 877 602 5028 or www radiothermostat com
3. 16 W09 D9UU0Da L SYIOT MMM 10 GZ9G PSZ 2Zg8 40ddns jsawojsnD wia sAs InoA uo S ON LS 90 Installation Guide Connect Caution e Your thermostat is a precise instrument handle it with care e Turn off electricity to the HVAC system before installing or servicing thermostat or any part of the system Do not turn electricity back on until work is completed e Do not short jumper across electric terminals at the control on the furnace or air conditioner to test the system This may damage the thermostat All wiring must conform to local codes and ordinances e This thermostat is designed for use with 24 volt AC and millivolt systems with a separate 24VAC power adapter e The thermostat relay load should be limited to 1 0 amp higher amperage may cause damage to the thermostat A Caution To avoid electrical shock and to prevent damage to the furnace air conditioner and thermostat disconnect the power supply before beginning work This can be done at the circuit breaker or at the HVAC system ENGLISH TOOLS You will need a small Phillips screwdriver and a drill with 3 16 in 4 8mm bit for wall mounts LOCATION Replacement installations mount the LS 90 in place of the thermostat You must have a C wire or other 24VAC power available at the LS 90 location A new location will require moving your wiring New installations and for re locating the LS 90 follow the guidelines listed below e Locate th
4. age the labels for each wire in handling Screw terminal e Fan wires out as illustrated with LS 90 below the wall opening As in the example fan out the wires so that the C wire is above the C terminal the W above the W This allows the LS 90 to tt snug to the wall e Wires will position behind the LS 90 and up over the terminal area e Do not bunch wires behind LS 90 Feed any slack back into the wall opening Connect your wires e Connect labeled wires only to a terminal with the same letter label e Insert the wire in the terminal well and tighten the screw securely e Do not over tighten this will cut the wire e If a 24VAC transformer Radio Shack PN273 1690 is used connect to the C and RH terminals no polarity Mount the LS 90 to wall 1 Hold the LS 90 against the wall with the wires coming over the top above terminal block The LS 90 will cover the hole in the wall 2 Position LS 90 for best appearance Use the optional stand offs if more space for wires is needed behind the LS 90 3 Attach the LS 90 to the wall with the screws provided 4 If you are mounting the LS 90 to sheet rock or if you are using the old mounting holes use the plastic anchors provided 5 Mark rst and drill a 3 16 in 4 8mm hole for the insert at each screw location then mount the LS 90 anchor HVAC Set up on screen menu With all the wires connected including the C wire it is time to turn the AC power
5. back on Do this at the breaker you used to switch it off The LS 90 will power up in the control OFF mode Your LS 90 is not con gured to operate your HVAC system yet You must now use the menu driven HVAC SET UP function A IMPORTANT Make sure the LS 90 is powered up and is in the OFF mode before set up To turn your thermostat off press the Power button in the middle of the control bar to the right of the display and touch OFF Heating and cooling systems must be con_gured separately SET UP for NORMAL systems not a heat pump 1 Press the purple MENU button on the control bar and then touch HVAC SET UP 2 Touch to highlight HEAT in the upper left corner of the display 3 Touch to highlight NORMAL 4 Select the appropriate number of stages for your heating system from 1 to 3 by touching the number of STAGES in brackets to highlight and using the buttons to increase or decrease 5 Touch the appropriate FAN CONTROL setting Select HVAC if your heating system controls the fan appropriate for most gas oil propane and similar furnaces Select TSTAT if you want the thermostat to control the fan for most electric heating systems 6 Go on to con_gure COOL or press HOME to return to the Home screen SET UP for NORMAL A C cooling systems 1 Press MENU and then touch HVAC SET UP 2 Touch and highlight COOL in the upper left corner of the display 3 Select the number of stages of compression for your co
6. e thermostat on an inside wall about 5 ft 1 5m above the floor and in a room that is used often e Do not install it where there are unusual heating conditions such as in direct sunlight near a lamp radio television radiator register fireplace near hot water pipes in a wall or near a stove on the other side of a wall e Do not locate in unusual cooling conditions such as on a wall separating an unheated room or in a draft from a stairwell door or window Do not locate in a damp area This can lead to corrosion that will shorten thermostat life Do not locate where air circulation is poor such as in a corner an alcove behind an open door e Do not install the LS 90 until all construction and painting has been completed e This thermostat does not require leveling REMOVE OLD UNIT A Switch OFF electricity to the furnace and air conditioner then follow these steps e Remove cover from old thermostat Most are snap on types and simply pull off Some have locking screws on the side or front These must be loosened DO NOT remove wires Note the letters printed near the terminals Attach labels enclosed to each wire for identification Caution Read instructions carefully before removing any wiring from existing thermostat Wires must be labeled before they are removed THERE IS NO STANDARD COLOR CODE When remov ing wires from their terminals ignore the color of the wires and LABEL THEM by the terminal where the
7. es can easily be set on the large touch screen with the buttons A minimum 4 minute off time protects heating and cooling compressors from damage This thermostat uses a new technique called sequential staging for more comfort with faster reaction to requested temperature changes 24VAC is Required This thermostat must be run on the HVAC systems 24VAC C wire or external 24VAC transformer connected to the C and RH terminals The 24VAC C wire is the other side of the 24VAC heating transformer and can be found where the other thermostat wires connect at the wall or at the furnace Do not use the common or ground side of the line voltage Calibration Calibrate controls Your thermostat was accurately calibrated at the factory to 1 F of actual ambient temperature You do have the option however to change the CALIBRATE 12 30pmWED 5 display temperature to match that of a previous thermostat or to match another thermostat DELTA already in your home from 1 9 F i To change your Thermostat Calibration 1 Press MENU and then touch CALIBRATE ACTUAL 2 Use the buttons to adjust the displayed TEMP DISPLAYED TEMP temperature up or down as desired TI 3 The DELTA FACTOR that appears on the SCOMIRADI a BAUR screen will also automatically increase or decrease for each 1 adjustment The large display will show the modiCed temperature reading that will be displayed on the HOME screen in normal operation 4 Pres
8. oling system 1 or 2 by touching the number of STAGES and using buttons to increase or decrease 4 Touch to select the appropriate FAN CONTROL setting HVAC or TSTAT NOTE Most cooling systems require that the thermostat TSTAT control the fan 5 Press HOME to return to the Home screen HVAC SET UP 12 30pm WED 77 HEAT or COOL SET UP for HEAT PUMP systems NORMAL ii 1 Press MENU and then touch HVAC SET UP Sny NONE 2 Touch HEAT in the upper left corner of the display AUX ELECT or GAS OIL 3 Touch HEAT PUMP FAN CTRL TSTAT 4 Select the number of stages of compression for your heat pump system 1 or 2 by touching the number of STAGES and using the buttons to increase or decrease NOTE Most heat pump systems have one stage of compression 5 If you have AUXILIARY heat touch the number of stages default is NONE use the buttons to select 1 2 stages NOTE The LS 90 controls a maximum of 3 stages total between pump and AUX 6 If you have AUX Select the type of auxiliary heat that you have Electric or Gas Oil NOTE Most heat pump systems have electric heat strips for auxiliary heat 7 Fan Control is set by the LS 90 tstat for heat pumps 8 Press HOME button to return to the Home screen NOTE For heat pump system your cooling is already con_gured since the heat pump unit provides both heating and cooling STAGES BACK gt Check HVAC system Temperature Buttons Follow these procedure
9. s HOME to return to the Home screen LCD Screen CONTRAST can be adjusted To change LCD Screen CONTRAST From the CALIBRATE screen 1 Select CONTRAST and adjust by touching the on screen lt and gt controls for best viewing 2 Press HOME to return to the Home screen 12 Humidifier FOR EXTERNAL HUMIDIFIER To use the internal humidistat to control an external or DEHUMIDIFIER USING humidifier unit connect it as shown Connect the H HVAC SYSTEM s 24vac terminal to the control leg of the humidifier relay This 0 allows H to turn the humidifier ON and Off RH Hor DH De Humidifier To HUMIDIFIER To use the internal humidistat to control an external or De humidifier unit connect it as shown Connect the DH DEHUMIDIFIER terminal to the control leg of the dehumidifier relay This allows DH to turn the dehumidifier ON and Off Fresh Air FOR EXTERNAL HUMIDIFIER The Fresh Air feature uses the EX relay to control a baffle or DEHUMIDIFIER USING on a fresh external air source Connect the 24VAC baffle USING 24VAC ADAPTER to C and EX terminals 0 H or DH FOR FRESH AIR BAFFLE FURNACE R To HUMIDIFIER RH EX POWER JC or o DEHUMIDIFIER FURNACE R POWER Jc BAFFLE WIRE REFERENCE CHART Your Wires LS 90 Terminal RorVorVR RH and RC Single power for HEAT and COOL RH or 4 RH Power for HEAT RH not connected to RC jumper clip removed RC RC Power for COOL RH not connected to RC jumper clip removed Ww W Heat control W2 W2 2nd
10. s to verify you have correctly installed the LS 90 To check Fan If you connected the G wire fan relay 1 Touch the FAN icon on the HOME screen and select ON 2 Verify that air is blowing from the system Return fan to AUTO selection for normal operation Press HOME To check HEAT mode 1 Press the mode control 0 and select HEAT 2 Press the button to raise the target temp to 90 F Allow the control system 2 minutes to respond 3 Verify that heat is blowing from the system l 4 Return mode control O to OFF leave OFF for 4 minutes before checking COOL To check COOL mode do not operate AC if outside temp is below 65 F 1 Press the 0 mode control and select COOL 2 Press the blue button to lower the cool target temperature to 50 Allow the system 5 minutes to respond 3 Verify that cool air is blowing from the system 4 Return mode to OFF 10 Congratulations you have successfully installed your unit Please proceed to the OPERATING Guide to initialize the LS 90 A IMPORTANT After you have labeled and connected your wires and followed the correct HVAC set up if these check procedures do not operate your system call support at 1 877 602 5028 8am 12am EST LS 90 Features This thermostat can be used with all 24VAC and millivolt 24VAC external power heating and cooling systems It cannot be used with line voltage systems This thermostat is digital and your desired heat or cool temperatur
11. y were screwed e Label the wires one at a time You must label all the wires before you proceed With all wires labeled remove them from the old unit e Make sure the wires do not fall back inside the wall You can wind them around a pencil to keep them from falling e Loosen all screws on the old thermostat and remove it from the wall What wires do you have Make sure your wires are labeled This may require you to nd the other end connection for each wire on your heating or air conditioning equipment and read the label there Refer to the Wire Reference page 13 for better understanding of wire labels from different HVAC system makers A IMPORTANT C wire or 24VAC power is required for the LS 90 to operate If you do not have a C wire you can run a new wire from the HVAC to the LS 90 or provide 24VAC power to operate the LS 90 using a standard 24VAC wall transformer A IMPORTANT If you have both RH and RC you need to remove the metal jumper clip between these 2 terminals A IMPORTANT If you have both O and B you must check Prepare wires page 13 for wiring info Please follow these guidelines for safe and secure wire connections e You will need at least 2 6 of wire for each of your connections to the LS 90 e If you do not have enough wire splice additional wire to allow enough slack e Fan out wires below the hole as shown e Remove insulation 1 8 from the tip of each wire e Take care not to dam
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