Honeywell T8501D User's Manual
Contents
1. Honeywell Tro aeme T8501D Deluxe Zone Thermostat APPLICATION INSTALLATION INSTRUCTIONS The T8501 Deluxe Zone Thermostat provides electronic control of 24 Vac single stage zoned heating and cooling systems Refer to Table 1 for a general description of the thermostat Table 1 Description of T8501 Thermostat Model Application Powering Method System Selection Fan Selection T8501D Zone 1 on MABS Il or Requires common wire to Automatic or Heat Off Cool Auto On Auto TotalZone system power supply Manual RECYCLING 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 the old thermostat INSTALLATION When Installing this Product 1 Read these instructions carefully Failure to follow the instructions can damage the product or cause a hazardous 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 trained experienced service technician 4 After completing installation use these instructions to check out the product operation 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 U S Registered Trademark Copyright 192. Installer Self Test Options Continued Key to Test Press Number Description Key Operation System Test IMPORTANT Test numbers will only be displayed when the system is configured for the selected function EXAMPLE Numbers 60 61 and 62 are the only numbers that will be displayed when a system is configured for heat only System Key System Test PT f e orange from eooingortaniokeyoperaionsystemten Fan Key System Test Fan e Fano TestNumeris played ran oo Fan offTestNumberis displayed NOTE Press and hold the increase A and decrease W keys together for three seconds to exit the system test The system test will time out after ten minutes without any key presses THERMOSTAT INFORMATION 3 Press the increase A key again to display the software identification code 1 Press the Information i key to access the thermo stat information M4866 4 Press the increase A key again to display the Mares software revision number Example 001 Revision A number 1 2 Press the increase A key to display the production date code The first two large digits are the month and the third digit is the last digit of the year Example 027 February 1997 M6791 M10444 7 69 1049 1 T8501D DELUXE ZONE THERMOSTAT 5 Press the increase A key again to display the CHECKOUT EEPROM identification code Outdoor Temperature Sensor Where Applicable Allow the outdoor temperature se
3. system test CAUTION The minimum off time for compressors is bypassed during the Installer System Test Equipment damage can occur if the compressor is cycled too quickly Press and hold the increase A and decrease W keys at the same time until two zeros appear All segments of the LCD will be displayed before the two zeros appear See M6792 Fig 11 and 12 TEST MODE NUMBER Fig 12 Display of test number Table 3 Tests Available In The Installer System Test Test Number Self Test Description 10 19 Heating equipment can be turned on and off NOTE Press and hold the increase A and decrease Y keys together for three seconds to exit the 30 39 ane equipment can be turned on system test The system test will time out after anao ten minutes without any key presses 40 49 Fan equipment can be turned on and off 60 69 Keyboard keys test 70 79 Thermostat information including date code and software versions are displayed Table 4 Installer System Test Options E tn Press Number Description Heating Equipment System Test 2 m Heat comes on When instaler Setup number 021501 ine system fan 1s alsoenergized Py o Heatandsystemiantumof 1 Refer to Table 4 for the directions and results of the specific tests m a i 40 Change rom cooing to an equipment yenes a n memes OOOO Co o mm Continued 69 1049 1 6 T8501D DELUXE ZONE THERMOSTAT Table 4
4. 97 Honeywell Inc All Rights Reserved 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 sun or appliances concealed pipes and chimneys unheated uncooled areas such as an outside wall behind the thermostat Wallplate Installation The thermostat can be mounted horizontally on the wall or on a 2 in x 4 in wiring box Position wallplate horizontally on the wall or on a 2 in x 4 in wiring box 1 Position and level the wallplate for appearance only The thermostat will function properly even when not level 2 Use a pencil to mark the mounting holes See Fig 2 3 Remove the wallplate from the wall and drill two 3 16 inch holes in the wall if drywall as marked For firmer material such as plaster drill two 7 32 inch holes Gently tap anchors provided into the drilled holes until flush with the wall 4 Position the wallplate over the holes pulling wires through the wiring opening 5 Loosely insert the mounting screws into the holes 6 Tighten mounting screws 69 1049 1 T8501D DELUXE ZONE THERMOSTAT 5 FEET R 1 5 METERS M10106 Fig 1 Typical location of thermostat Wiring WALL All wiring must comply with local electrical codes and ordinances Refer to Fig 3 and 4 for typical hookups A WIRES letter code is located near each terminal for identificatio
5. ay returns to normal approximately three seconds The display will scroll the numbers backwards to get to the normal display The Installer Setup is automatically exited if no key presses are made for ten minutes Remote O Room Em Ht Temporary Setting Aux at ya TOI Humid pa Rep I I DR IE outdoor Batt Q Waite Heat Cool A xw y Em HeatOffCool Auto Only 11 Oi M4844 Fig 9 Display of all the segments of the LCD INSTALLER SETUP MODE NUMBER DISPLAY COLUMN 2 OF TABLE 2 FACTORY SETTING OR OTHER CHOICE DISPLAY COLUMN 3 OR 5 OF TABLE 2 M10105A Fig 10 Display of Installer Setup number and setting IMPORTANT Only configurable numbers are shown on the device Example If thermostat does not have outdoor temperature capability Installer Setup Number 24 will not be displayed Review Table 2 factory settings and mark any desired changes in the Actual Settings column When Installer Setup is complete review the settings to confirm that they match the system T8501D DELUXE ZONE THERMOSTAT Table 2 Thermostat Installer Setup Options Installer Setup Number Other Choices Press i key A Setting Er Aor VW key to change to change Conventional applica tions where equipment pr Im a _ controls fan operation Fan operation in heat mode Mouse o IS 2 Heating cycle Mu 6 cph used for rate conventional systems Gm al a e Act
6. ermostat on wallplate Using Thermostat Keys The thermostat keys are used to e set temperature display present setting configure Installer Setup check System Test display outdoor temperature select models set the system operation set the fan operation See Fig 7 for the location of the keys INCREASE TEMPERATURE SETTING eae DECREASE TEMPERATURE SETTING DISPLAY PRESENT SETTINGS AND SCROLL THROUGH INSTALLER SETUP MODES INFORMATION KEY M6801 Fig 7 Key locations and descriptions 69 1049 1 T8501D DELUXE ZONE THERMOSTAT SETTINGS System and Fan Settings System settings control the thermostat operation as follows Heat The thermostat controls the heating Off Both the heating and cooling are off Cool The thermostat controls the cooling Auto The thermostat automatically changes between heating and cooling operation depending on the indoor temperature Fan settings control the system fan as follows On Fan operates continuously Auto Fan operates with equipment The system default setting is Heat and the fan default setting is Auto Use the keyboard to change to the desired settings See Fig 8 A CHECK LIGHT ON SELECT MODELS M10147 Fig 8 Thermostat System and Fan key location NOTE Always press the keys with your fingertip or similar blunt tool Sharp instruments like a pen or pencil point can damage the keyboard Temperature S
7. ettings The default setpoint for heat is 70 F 21 C and for cool is 78 F 25 5 C Press the increase A or decrease W key to change the present setting to change between heat and cool press the Information i key until the setting to be changed appears Press the increase A or decrease Y key to adjust the setting INSTALLER SETUP NOTE For most applications the thermostat factory settings will not need to be changed Review the factory settings in Table 2 and if no changes are necessary go to the Installer System Test section 69 1049 1 The Installer Setup is used to customize the thermostat to specific systems Some of the options include temperature display changeover and outdoor temperature display Installer Setup numbers are listed in Table 2 The table includes all the configuration options and the factory settings for the T8501 A combination of key presses are required to use the Installer Setup feature To enter the Installer Setup press and hold the Information i key with the increase A and decrease Y keys until the first number is displayed All display segments appear for approximately three seconds before the number is displayed See Fig 9 and 10 To advance to the next Installer Setup press the Information i key To change a setting use the increase A and de crease W keys To exit the Installer Setup press and hold the Information i key until the displ
8. n AN CAUTION Disconnect power before wiring to prevent electrical shock or equipment damage 1 Loosen the terminal screws on the wallplate and connect the system wires See Fig 5 0 IMPORTANT Use 18 gauge color coded thermostat cable for proper wiring Securely tighten each terminal screw Push excess wire back into the hole Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat MOUNTING HOLES ON p N MOUNTING SCREWS M6530 Fig 2 Mounting the wallplate 69 1049 1 2 OUTDOOR a i OPTIONAL E e e CHANGEOVER CONTROL M12187 Fig 3 Typical wiring diagram for T8501D with zone 1 MABS II control panel OUTDOOR THERMOSTAT SENSOR OPTIONAL OOOVOUYOOM TotalZone PANEL THERMOSTAT CONNECTIONS minted Fig 4 Typical wiring diagram for T8501D with zone 1 TotalZone control panel 5 N N pl STRAIGHT INSERTION STRIP FOR WRAPAROUND INSERTION STRIP 5 16 IN 8 MM 7 16 IN 11 MM M4826 Fig 5 Proper wiring technique T8501D DELUXE ZONE THERMOSTAT Mounting Thermostat 1 Engage tabs at the top of the thermostat and wallplate See Fig 6 2 Press lower edge of case to close and latch NOTE Toremove the thermostat from the wall first pull out at the bottom of the thermostat remove top last A ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE M6798A Fig 6 Mounting th
9. nfigure to 00 is not displayed but heating or cooling system is operating Outdoor Option not activated Enter Installer Setup number 24 and set to 01 Thermostat must temperature have OT terminals and a C7089B1000 installed not displayed Outdoor Outdoor sensor is connected Refer to C7089B1000 installation instructions and check wiring temperature incorrectly between the thermostat and sensor display is incorrecta Replace sensor with C7089B1000 sensor 4 Available on select models 9 69 1049 1 69 1049 1 10 11 69 1049 1 Honeywell Honeywell Trol A Temp 57 Bushes Lane Elmwood Park NJ 07407 3204 201 794 8004 800 828 8367 Fax 201 794 1359 a 69 1049 1 J H Rev 6 97 Printed in Taiwan R O C ao Helping You Control Your World www honeywell com yourhome
10. nsor to soak in the outdoor air for a minimum of five minutes before taking a reading With an accurate thermometer 1 F 0 5 C measure the temperature at the sensor location allowing time for the thermometer to stabilize before reading Match the thermometer reading to the outdoor temperature M4867 display at the thermostat 6 Press and hold the increase A and decrease Y keys together until the room temperature is displayed to exit the system test The system test times out after ten minutes without any key presses TROUBLESHOOTING GUIDE Symptom _ Possiiecause Ja Display will not Thermostat is not being e Check that C terminal is connected to the system transformer come on powered Check for 24 Vac between C and R terminals If missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the power switch on the HVAC equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat microprocessor is Remove the thermostat from the wallplate for 2 minutes After locked up 2 minutes replace the thermostat on the wallplate Temperature Room temperature display Enter Installer Setup number 37 and reconfigure the display display is incorrect has been reconfigu
11. red Thermostat is configured for Enter Installer Setup number 14 and reconfigure the display F or C display 2 Bad thermostat location Relocate the thermostat Temperature The upper or lower Check the temperature setpoints settings will not temperature limits were e Heating limits are 40 to 90 F 4 5 to 32 C change Example reached Cooling limits are 48 to 99 F 7 to 35 C Cannot set the heating higher or The setpoint temperature Check Installer Setup numbers 34 and 35 and reconfigure the the cooling lower range stops were configured setpoint stops a Available on select models Continued 69 1049 1 8 T8501D DELUXE ZONE THERMOSTAT Troubleshooting Guide Continued Heating will not No power to the thermostat fe Check that C terminal is connected to the system transformer come on e Check for 24 Vac between C and R and between R and W terminals If missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the system switch at the equipment is in the Off position set to On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off time Wait up to five minutes for the system to respond is activated System selection is not set to Set system selection to Hea
12. t Heat Cooling will not No power to the thermostat Check that C terminal is connected to the system transformer come on Check for 24 Vac between C and R and between R and Y terminals If missing 24 Vac check if the circuit breaker is tripped reset the circuit breaker check if the system fuse is blown replace the fuse check if the system switch at the equipment is in the Off position set to the On position check wiring between thermostat and HVAC equipment replace any broken wires and tighten any loose connections If 24 Vac is present proceed with troubleshooting Thermostat minimum off time Wait up to five minutes for the system to respond is activated Enter Installer Setup number 33 Reconfigure minimum off time if required System selection is not set to Set system selection to Cool Cool System on indicator Fan operation set for 00 Enter Installer Setup number 02 and reconfigure the fan flame heat conventional heat when it operation snowflake cool is Should be set for 01 electric displayed but no heat warm or cool airis Conventional heating Wait a minute after seeing the On indicator and then check the coming from the equipment turns on the fan registers registers when the furnace has warmed up to a setpoint Heating equipment is not Verify operation of heating equipment in self test operating System on indicator Option not activated Enter Installer Setup number 36 and reco
13. tion is extended 90 seconds after the call for rr ends _ aE temperature is displayed Needs a C7089B1 Outdoor Sensor to operate Minimum number of minutes 0 thru 5 the compressor will be or 04 off between calls for the compressor Number can be set anywhere between 40 and 90 in 1 F increments Number can be set anywhere between 48 and 99 in 1 F increments Display is disabled 3 an 01 Display adjusts to 1 F higher than actual room temperature 02 Display adjusts to 2 F higher than actual room temperature 03 Display adjusts to 3 F higher than actual room temperature 1 Display adjusts to 1 F lower than actual room temperature 2 Display adjusts to 2 F lower than actual room temperature 3 Display adjusts to 3 F lower than actual room temperature 69 1049 1 T8501D DELUXE ZONE THERMOSTAT IMPORTANT Review the settings to confirm that they match Em Ht Temporary Setting Remote the system To exit the Installer Setup press and Aux Ht NM O Room hold the Information i key until the display E Be gt a 9 Humid returns to normal approximately three seconds u Fam epp 8 Repl Ol It U It Outdoor Batt Q Wait W Heat Cool A ppp INSTALLER SYSTEM TEST En one ool Ans CAN Orto Use the Installer System Test to check the thermostat MOM operation Refer to Table 3 for a list ofthe available Fig 11 Display of all the segments of the LCD system tests To start the
14. ual Setting a ER EA Heat pump and electric heat applications where thermostat controls fan operation in heat iH 01 03 01 1 cph used naar radiant floor or 09 heat gravity systems 03 3 cph used for hot water systems or high efficiency furnaces 09 9 cph used for electric heat Changeover 12 Manual changeover or 00 Manual N 02 Auto AAA Degree temperature Temperature is displayed in F display Extended fan operation in heating Extended fan operation in cooling Outdoor temperature display EE Minimum off time for the compressor Heating setpoint range stop Cooling setpoint range stop indicator flame heat snowflake cool is displayed Temperature display adjustment em 15thrut8 u 18 a extended fan operation after the call for heat ends No extended fan operation after the call e cool ends 21 u 21thru23 a outdoor temperature is displayed 5 minute minimum off time for the compressor Heating setpoint can be set no higher than 90 F Cooling setpoint can be set no lower than LCD On symbol is displayed when system is energized No difference in displayed temperature and actual room temperature Number 02 must be set to 01 to extend fan operation Available on select models ia cama Temperature is displayed in C 01 OT nar operation is extended 90 seconds after the call for heat ends Fan opera
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