Honeywell Thermostat T8411R User's Manual
Contents
1. CAUTION Equipment Damage Hazard Operating at too low of an outdoor temperature may cause compressor damage Do not operate cooling if outdoor temperature is below 50 F 10 C Refer to manufacturer s recommendations For compressor protection allow the compressor to remain off for five minutes before restarting 1 Slide the SYSTEM switch to Cool and the FAN switch to Auto 2 Press the W key to lower the temperature setting several degrees below the room temperature After approximately five minutes the cooling equipment and fan should start 3 Press the A key to raise the temperature setting above the room temperature Cooling system should shut down Fan 1 Slide the SYSTEM switch to Off and the FAN switch to On The fan should run continuously 2 Slide the FAN switch to Auto The system turns the fan on and off with the equipment Make certain all equipment responds properly to the thermostat Honeywell Automation and Control Solutions Honeywell Honeywell Limited Honeywell Limit e 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario MIV 4Z9 69 1486 1 G H Rev 2 02 Printed in Mexico www honeywell com yourhome2. m me a pm M14680 3 To increase the temperature setpoint press the A key Each press changes the setpoint one degree press and hold to change the setpoint several degrees rire pa M14681 4 To decrease the temperature setpoint press the Y key Each press changes the setpoint one degree press and hold to change the setpoint several degrees IiI M14682 T Setting F C Indication and Heat Cycle Rate NOTE To save changes to the F C indication and the heat cycle rate all seven steps must be com pleted In installer setup mode steps 2 through 5 each press of the A key momentarily displays 01 and each press of the W key momentarily displays 02 When the keys are released these two digit codes are no longer displayed To set the F C indication and heat cycle rate 1 If the temperature is displayed in F set the tem perature setpoint to 52 F If the room temperature is displayed in C set the temperature setpoint to 11 C M14683 2 Press the AW keys simultaneously for more than one second to light all segments on display and to enter installer setup mode When the keys are released a two digit software revision code is dis played Pat at ba Pat ob M18426 OPTIONAL SYSTEM CHECKOUT When the heat or cool outputs are turned on the five minute off timer safety feature is bypassed When in steps 2 and 3 only the W key can be used to tur
3. Honeywell T8411R Electronic Heat Pump Thermostat The T8411R Heat Pump Thermostat provides 24V control of two stage heating and one stage cooling heat pump system with manual changeover from heat to cool First stage heating and cooling cycle rates are fixed at 3 cph Second stage heating cycle rate is selectable at 3 4 5 6 9 or 12 cph Temperature indication can be set for F or C The T8411R Heat Pump Thermostat is powered directly from the system transformer Batteries are not required because setpoints are held permanently by non volatile memory The T8411R includes a thermostat wallplate for wiring and mounting thermostat and owner s guide A 7 3 8 in x 5 3 4 in 188mm x146 mm decorator cover plate for covering wall marks is available separately Order Honeywell part no 209649A taupe color MERCURY NOTICE If this control is replacing a control that contains mercury in a sealed tube do not place your old control in the trash Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control containing mercury in a sealed tube INSTALLATION ee Installing this Product Read these instructions carefully Failure to follow them could damage the product or cause a hazard ous condition 2 Check the ratings given in the instructions and on the product to make sure the product is suitable for your application 3 Installer must be a t
4. SHADED AREA WIRING ENTRANCE MOUNTING A NOT ALL MODELS HAVE BOTH O AND B TERMINALS Fig 4 Restrict wiring to shaded area Refer to Fig 5 for typical wiring hookups A letter code is located near each terminal for identification 1 2 3 4 Loosen the terminal screws on the wallplate and connect the system wires See Fig 5 Securely tighten each terminal screw Push the excess wire back into the hole Plug the hole with nonflammable insulation to pre vent drafts from affecting the thermostat Mounting Thermostat to Wallplate THERMISTOR SENSOR THERMOSTAT LOGIC 1 Engage the tabs at the top of the thermostat and wallplate 2 Swing down the thermostat and press the lower edge of the thermostat onto the wallplate to latch See Fig 6 MOUNTING SCREW HOLE M11331A L1 R HOT STAGE 2 RELAY L2 AUXILARY 7 oo HEAT RELAY SYSTEM A 2 SWITCH EM HT 4 RELAY ae HEAT CHANGEOVER OFF C a VALVE HEAT gjg xe __ COOL _ a i A CHANGEOVER re o VALVE COOL gls EH COMPRESSOR STAGE 1 RELAY fan rer CONTACTOR ii 2 Enq I I of o 172 COMPRESSOR rat HEAT oy Beh EMERGENCY HEAT RELAY FAN SWITCH Ca cats 1 FAN RELAY N AUTO POWER SUPPLY ACH A PO
5. WER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A REMOVE JUMPER WHEN SUPPLIED FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR W1 SEPARATE FROM Y Anor ALL MODELS HAVE BOTH O AND B TERMINALS M11333A Fig 5 T8411R two stage heat and one stage cool wiring diagram with manual changeover 69 1486 1 T8411R ELECTRONIC HEAT PUMP THERMOSTAT DASHED LINES INDICATE TABS ON BACK OF THERMOSTAT B PRESS LOWER EDGE OF CASE TO LATCH M18541 Fig 6 Mounting thermostat wallplate OPERATION Setting FAN and SYSTEM Switches Fan and system settings are controlled manually by using the switches located at the bottom of the thermostat case See Fig 7 69 1486 1 FAN Switch Fan switch settings are On The fan runs continuously Use for improved air circulation and air quality Auto Normal setting for most homes The fan starts and stops with the equipment Slide the FAN switch in the bottom left corner of the thermostat to select the desired fan setting SYSTEM Switch System switch settings control thermostat operation as follows Cool The thermostat controls the cooling system Off Both heating and cooling are off Heat The thermostat controls the heating system Em Ht Thermostat cycles auxiliary heat W2 and emergency heat relay E as needed to maintain setpoint Terminal L is energized continuously Fault heat relay is on continuously Cooling system is off Compressor is de ener
6. e the heat cycle rate press the W key to scroll between 3 4 5 6 9 and 12 Stop scrolling when the desired rate is displayed m M14690 Table 1 Heat Cycle Rates System Cycle Per Hour Hydronic heat condensing gas 3 furnace Gas or oil forced air 6 Electric heat 9 Special applications 4 5 12 aHigh efficiency furnace Refer to equipment manufacturer s instructions 7 Press the A key to display cooling algorithm con figuration default O forf J M18421 8 Press the A key again to change cooling algorithm to C1 or C3 C1 Standard cooling algorithm C3 Aggressive cooling algorithm can cause overshooting 9 Press the A key again Current configuration CC is displayed A typical example is shown but CC varies by model This information is for factory use only M18420 10 Press the A key to save all changes exit installer setup mode and return to normal operation NOTE After exiting installer setup mode change the setpoint to the desired room temperature CHECKOUT Heating 1 Slide the SYSTEM switch to Heat and the FAN switch to Auto 2 Press and hold the A key to raise the temperature setting several degrees above the room tempera ture After approximately five minutes the heating equipment should start 3 Press the W key to lower the temperature setting below the room temperature Heating equipment should stop Cooling
7. gized Slide the SYSTEM switch in the bottom right corner of the thermostat to select the desired system setting TEMPERATURE DISPLAY INCREASE SETTING DECREASE SETTING L FAN SWITCH SYSTEM SWITCH f M18542 Fig 7 Digital display and system switches FAN and SYSTEM Em Ht and Aux Ht Indications The A indicator points to either Emergency Heat Em Ht or Auxiliary Heat Aux Ht when these modes are active Em Ht The A indicator points to Em Ht when the SYSTEM switch is set at Em Ht Aux Ht The A indicator points to Aux Ht when the auxiliary backup heat is needed to help handle the heating load INDICATOR T8411R ELECTRONIC HEAT PUMP THERMOSTAT Set Temperature Setpoint NOTE Temperature setpoint range is 40 to 99 F 4 to 39 C The temperature setpoint and the room temperature are shown separately on the digital display The W indicator points to Set when the temperature setpoint is displayed and to Room when the room temperature is displayed INDICATOR Sal Room ROOM TEMPERATURE SETPOINT TEMPERATURE M14679 To set temperature setpoint 1 Select Heat or Cool by sliding the SYSTEM switch in the lower right corner of the thermostat to the desired mode See Fig 7 2 To display the temperature setpoint on the digital display press either the A or W key once The temperature setpoint is displayed for approxi mately five seconds as the indicator points to Set and flashes
8. ided into the holes until flush with the wall 5 Position the wallplate over the holes 6 Pull the thermostat wire through the wallplate entrance hole 7 Fasten the wallplate to the wall using the anchors and screws provided 69 1486 1 T8411R ELECTRONIC HEAT PUMP THERMOSTAT 5 FEET 1 5 METERS M11338 Fig 1 Typical location of thermostat WALL WALL ANCHORS 2 AO MOUNTING SCREWS 2 N A WHEN USING WALL ANCHORS DRILL 3 16 INCH HOLES FOR DRYWALL 7 32 INCH HOLES FOR PLASTER OR WOOD Mtz2024 Fig 2 Mounting wallplate to wall Wiring IMPORTANT Use an 18 gauge maximum wire for wiring the T8411R Thermostat All wiring must comply with local electrical codes and ordinances A CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation 69 1486 1 The shape of the terminals permits insertion of straight or wraparound wiring connections either method is acceptable See Fig 3 FOR STRAIGHT INSERTION TERMINAL STRIP 5 16 IN 8 MM SCREW FOR WRAPAROUND STRIP 7 16 IN 11 MM G A NOT ALL MODELS HAVE BOTH O AND B TERMINALS M11334A Fig 3 Wiring connections NOTE To ensure proper mounting of thermostat restrict all wiring to the shaded area See Fig 4 T8411R ELECTRONIC HEAT PUMP THERMOSTAT KEEP WIRING IN
9. n heat or cool outputs on and off Change the SYSTEM switch setting to test heat or cool outputs No action takes place If the system switch is in the Off position The following examples of system settings show a two digit software code on the display The code shown is only an example codes may vary System setting at Heat To turn heat on press the W key M18431 To turn auxiliary heat on press the W key Aux Ht m S 1 a M18432 To turn auxiliary heat off press the W key a third time M18433 To turn heat off press the W key a fourth time mt Li 5 M18434 System setting at Cool To turn cool on press the W key i LI a M18435 To turn cool off press the W key M18434 3 Press the A key Factory information is displayed A typical example is shown but information dis played varies by model This information is for fac tory use only 4 Press the A key again to display C or F Z M14688 5 69 1486 1 T8411R ELECTRONIC HEAT PUMP THERMOSTAT 5 Press the W key to change the C or F indication r L M14689 NOTE Stage one heat and cool cycle rates are fixed at 3 cph Only stage two heat cycle rates are selectable 6 Press the A key to display the heat cycle rate of 3 4 5 6 9 or 12 If the desired cycle is displayed see Table 1 press the A key to exit the installer setup mode To chang
10. rained experienced service technician 4 After installation is complete check out product operation as provided in these instructions U S Registered Trademark Copyright 2002 Honeywell All Rights Reserved INSTALLATION INSTRUCTIONS CAUTION Electrical Shock or Equipment Damage Hazard Can shock individuals or short equipment circuitry Disconnect power supply before installation Location Install the thermostat about 5 ft 1 5m above the floor in an area with good air circulation at average temperature See Fig 1 Do not install the thermostat where it can be affected by drafts or dead spots behind doors and in corners hot or cold air from ducts radiant heat from the sun or appliances concealed pipes and chimneys unheated uncooled areas such as an outside wall behind the thermostat This thermostat is a precision instrument and was carefully adjusted at the factory Handle it carefully Mounting Wallplate to Wall IMPORTANT Level only for appearance The thermostat func tions normally even when not level Mount wallplate T8411R and the screws provided see z 2 as follows Place the wallplate at the desired location on the wall 2 Use a pencil to mark the mounting holes 3 Remove the wallplate from the wall and drill two 3 16 in holes in the wall if drywall or two 7 32 in holes for firmer material such as plaster or wood 4 Gently tap the anchors prov
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