Instruction/ maintenance manual of the product T8611M Honeywell
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1 68-0076—1 CONTENTS Specifications ................................................. 2 Ordering Information ..................................... 2 Selection/Application ..................................... 5 Installation .........................
2 T8611M SPECIFICATIONS • ORDERING INFORMATION Specif ications Ordering Inf ormation When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE Catalog or price sheets for complete ordering number, or specify— 1.
3 68-0076—1 T8611M SPECIFICATIONS Fig. 1—T8611 Subbase mounting dimensions in in. [mm]. 4 [121] 3 4 3 [83] 5 16 7 [179] 1 [46] 13 16 5 [135] 5 16 M5181A 4 3 32 [104] 1 31 32 [50] Fig. 2—202905AA Remote Sensor dimensions in in. [mm]. 4 3 32 [104] FRONT 1 31 32 [50] SIDE M5244 2 [51] 1 31 32 [50] 41 64 [16] 3 8 1 19 64 9 64 1 2 [8] [4] DIA.
4 T8611M SPECIFICATIONS Fig. 3—Typical thermostat keypad. SYSTEM RUN PROGRAM PERIOD TIME TEMPERATURE PRESENT SETTING SKIP NEXT PERIOD CHANGE TO LAST PERIOD SET PRESENT DAY/TIME HOLD TEMP DAY SET HEA.
5 68-0076—1 T8611M SELECTION/APPLICATION Selection/A pplica tion The T8611 Thermostat uses the latest microelectronic design and control technology to provide home and build- ing owners with the highest level of comfort available and optimal energy savings in a package that is easy to use and easy to live with.
6 Table 2 lists features and wiring terminal functions of the TRADELINE T8611M thermostat. TABLE 2—T8611M FEATURES AND TERMINALS. T8611M FEATURES COMMENTS Heating Stages 3 May be applied to 2-stage heat pump systems; see wiring Cooling Stages 2 diagrams Figs.
7 68-0076—1 (continued) TABLE 3—T8611 GUIDE FOR REPLACING POPULAR T874 AND T872 THERMOSTATS, BY EQUIPMENT MANUFACTURER. (NOTE : Also see form 70-6627, Heat Pump Thermostat Cross Reference Guide, for wiring hookup illustrations.
8 (continued) TABLE 3—T8611 GUIDE FOR REPLACING POPULAR T874 AND T872 THERMOSTATS, BY EQUIPMENT MANUFACTURER (Continued) . (NOTE: Also see form 70-6627, Heat Pump Thermostat Cross Reference Guide, for wiring hookup illustrations.
9 68-0076—1 (continued) TABLE 3—T8611 GUIDE FOR REPLACING POPULAR T874 AND T872 THERMOSTATS, BY EQUIPMENT MANUFACTURER (Continued) . (NOTE : Also see form 70-6627, Heat Pump Thermostat Cross Reference Guide, for wiring hookup illustrations.
10 TABLE 3—T8611 GUIDE FOR REPLACING POPULAR T874 AND T872 THERMOSTATS, BY EQUIPMENT MANUFACTURER (Continued) . (NOTE: Also see form 70-6627, Heat Pump Thermostat Cross Reference Guide, for wiring hookup illustrations.
11 68-0076—1 TABLE 3—T8611 GUIDE FOR REPLACING POPULAR T874 AND T872 THERMOSTATS, BY EQUIPMENT MANUFACTURER (Continued) . (NOTE : Also see form 70-6627, Heat Pump Thermostat Cross Reference Guide, for wiring hookup illustrations.
12 Installation COMPATIBILITY The T8611 Thermostats will replace most heat pump system thermostats. As long as ac power is continuously available to the thermostat, the thermostat will be compat- ible with almost any low-volt control system. WHEN INSTALLING THIS PRODUCT… 1.
13 68-0076—1 Fig. 4—Removing thermostat from subbase. The subbase mounts directly onto the wall with the screws and anchors included. Instead, the subbase can be mounted on a vertical or horizontal outlet box. If you must mount the subbase on a vertical outlet box, order 193121A Adapter Assembly.
14 STAGE 2 COMPRESSOR CONTACTOR POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. POSSIBLE CHECK LED CIRCUITS: SOME OLDER HEAT PUMP THERMOSTATS USE X FOR COMMON TERMINAL. NOMINAL 24 Vac POWER MUST BE PRESENT BETWEEN R AND C TERMINALS FOR THERMOSTAT OPERATION.
15 68-0076—1 Fig. 7—Restrict wiring to recessed area surrounding terminals. T8611M INSTALLATION DENOTES THERMOSTAT TO SUBBASE INTERCONNECT. APPLICABLE ONLY ON MODEL WITH REMOTE SENSOR. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
16 Fig. 8—T8611M Thermostat with EM.HT.-HEAT-OFF-AUTO-COOL system and ON-AUTO fan switching; EM.HT., CHECK, and AUX. HT. LEDS. Applied to 3-stage heat/2-stage cool system. Fig. 9—T8611M Thermostat with EM.HT.-HEAT-OFF-AUTO-COOL system and ON-AUTO fan switching, POWER SUPPLY.
17 68-0076—1 EM.HT. and CHECK LEDs. Applies to 2-stage heat/2-stage cool system in which both heating stages are compressorized. Fig.10—T8611M Thermostat with EM.HT.-HEAT- OFF-AUTO-COOL system and ON-AUTO fan switching; EM.HT., CHECK, and AUX. HT.
18 Fig. 13—Mounting thermostat on subbase. Check out ! CA UTION During cold weather, some heat pumps will re- quire that crankcase heater be energized several hours before operating heat pump.
19 68-0076—1 System Press Look For This Response Switch This Key Position Key Down Key Released OFF 03 Blank 07 Blank 15 Blank COOL or 15 1st stage cooling, fan and AUTO SYSTEM LED on. (with fan 15 2nd stage cooling also on. in AUTO) 15 2nd stage cooling off.
20 M5346 Third System Switch Sensor Digit Position Location 0 COOL, AUTO or OFF Local 1 HEAT or EM.HT. Local 4 COOL, AUTO or COOL Remote 5 HEAT or EM. HT. Remote Nominal Cycle Rate Fourth (cph at 50% load Digit for 3rd stage heat) 46 53 First Digit Degrees Clock (Hrs.
21 68-0076—1 Press and hold until the display shows the time that the temperature should be at the comfort setting. Press and hold until the display shows the desired heating temperature. If the display flashes while holding down TEMPERATURE WARMER or COOLER, the setting limit has been reached.
22 Press and release. The display shows NIGHT and the preprogrammed time and temp-erature. Press and hold until the display shows the time to start the energy saving period. Press and hold until the display shows the desired heating temperature. Program the NIGHT time and tem- perature, if desired.
23 68-0076—1 STEP 3 COPYING THE PROGRAM TO THE DESIRED DAYS It is possible to copy the program for one day to any other day or combina- tion of days. The new program will replace any program already set in the day selected. If necessary, press and release to enter the programming mode.
24 Press and release so COOL shows on the display. Press and release the PERIOD key to step through the time periods, and use the WARMER/COOLER keys to set the cooling temperature for each period. This completes the time and temperature program for another day.
25 68-0076—1 Then set the system switch. (contin- ued) AUTO (select models only): The ther- mostat controls either the heating or cool- ing system, depending on room tempera- ture. COOL: The thermostat controls the cool- ing system. This completes the programming of the thermostat.
26 REPROGRAMMING THE THERMOSTAT If schedule changes or a different tem- perature is desired, update any setting without affecting the rest of the pro- gram. Press and hold until the desired time period shows on the display. Press and hold until the desired schedule day shows on the display.
27 68-0076—1 Press and release to return to normal operation. CHECKING THE PROGRAM TIMES AND TEMPERATURES If desired, check all the stored settings without affecting the permanent program. Press and hold until the desired period shows on the display.
28 the auxiliary heat even when the T8611 is calling for it. (Balance point is the outdoor temperature below which the heat pump must call on auxiliary heat to help handle the load.) The resulting unnecessarily long recovery times reduce building energy savings.
29 68-0076—1 T r oub leshooting HEAT PUMP OR AUXILIAR Y HEAT WO N' T O PER ATE NO a c P OWE R TO THE RMOS TAT CH ECK POWER TO HEAT PUMP OR AUXILIAR Y HEATI NG S YS TEM – ON -OFF S WITC H –F.
30 conditioning equipment to return the building from the energy saving temperature to the comfort temperature. The thermostat starts the recovery period early so the building will be at the comfort setting by the time the owner has chosen. Setback Reducing the temperature in the building for a set period in heating for energy savings.
31 68-0076—1 T8611M TABLE OF CONTENTS T able of Contents Page Specifications ................................................................................................................. ................................................... 2 Ordering Information .
32 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 Printed in U.S.
An important point after buying a device Honeywell T8611M (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell T8611M yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell T8611M - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell T8611M you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell T8611M will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell T8611M, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell T8611M.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell T8611M. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell T8611M along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
