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T8611M
(7-Day Programming)
Chronotherm III™
Heat Pump Thermostats
The T8611M Chronotherm III Programmable
Thermostat provides automatic control of multi-
stage heat pump systems and offers users the
highest standard of comfort and convenience
available with energy savings.
n Full seven-day program capability; different sched-
stat indicates system is energized.
ules may be selected for every day.
n AUX. HT., EM. HT., CHECK LEDs available on
n Can be programmed in hand (with batteries in- select
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T8611M SPECIFICATIONS • ORDERING INFORMATION Specifications TRADELINE MODELS TRADELINE models are selected and packaged to replacement value. provide ease of stocking and handling and also maximum TRADELINE models available are listed in Table 1. TABLE 1—TRADELINE MODELS AVAILABLE. Stages Changeover Switching Thermostat Heat Cool Type System Fan Application Program T8611M* 3 2 Automatic EM. HT.-HEAT-OFF- ON-AUTO Heat Pump 7-Day AUTO-COOL *Model available with separate sensor for remote temperatu
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T8611M SPECIFICATIONS Fig. 1—T8611 Subbase mounting dimensions in in. [mm]. 31 1 32 [50] 13 1 16 [46] 3 4 32 [104] 5 5 16 [135] 5 3 [83] 16 3 4 [121] 4 7 [179] M5181A Fig. 2—202905AA Remote Sensor dimensions in in. [mm]. FRONT SIDE BACK 2 31 1 [51] 32 [50] 31 1 [50] 32 19 [8] 64 3 4 32 41 [16] 64 9 [104] [4] 3 64 1 [35] 8 1 DIA. 2 [13] [25] 1 M5244 3 68-0076—1
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T8611M SPECIFICATIONS Fig. 3—Typical thermostat keypad. SYSTEM AM ROOM WED HEAT ON MIDDAY TEMPERATURE PRESENT RUN SETTING PROGRAM TIME SET SKIP COPY PRESENT NEXT DAY PERIOD AHEAD WARMER FROM DAY/TIME PERIOD CHANGE SET BACK COOLER HOLD CANCEL COPY TO LAST TEMP HEAT/COOL PERIOD TO PERIOD FAN COOL HEAT OFF ON AUTO M5360 4
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T8611M SELECTION/APPLICATION Selection/Application The T8611 Thermostat uses the latest microelectronic IF RETROFIT/REPLACEMENT APPLICATION, design and control technology to provide home and build- CONSIDER ing owners with the highest level of comfort available and • equipment requirements optimal energy savings in a package that is easy to use and — system switching (manual: EM. HT.-HEAT-OFF- easy to live with. COOL, automatic: EM. HT.-HEAT-OFF-AUTO- The following section is a guide to selectio
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T8611M SELECTION/APPLICATION 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. 6 and 7. Changeover Auto Programming 7-day SYSTEM LED Yes Lights on call for heat or cool. EM. HEAT LED (red) Yes Lights continuously in EM. HEAT mode. AUX. HEAT LED (green) Yes Lights during call for final auxili
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T8611M SELECTION/APPLICATION 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.) Thermostat (Subbase Included) Auto Manual Changeover Changeover Weekday, Weekday, Sat, Sun Sat, Sun Auto T8611G1004 T8611R1000 Changeover T8611G1012 (° C) T8611R1042 (° C) 7-day T8611G1103 T8611R1141 T8611M7008 c (Premier White) (Premier White) T8611M7040 Thermostat
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T8611M SELECTION/APPLICATION 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.) Thermostat (Subbase Included) Auto Manual Changeover Changeover Weekday, Weekday, Sat, Sun Sat, Sun Auto T8611G1004 T8611R1000 Changeover T8611G1012 (° C) T8611R1042 (° C) 7-day T8611G1103 T8611R1141 T8611M7008 c (Premier White) (Premier White) T8611M7040
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T8611M SELECTION/APPLICATION 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.) Thermostat (Subbase Included) Auto Manual Changeover Changeover Weekday, Weekday, Sat, Sun Sat, Sun Auto T8611G1004 T8611R1000 Changeover T8611G1012 (° C) T8611R1042 (° C) 7-day T8611G1103 T8611R1141 T8611M7008 c (Premier White) (Premier White) T8611M7040
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T8611M SELECTION/APPLICATION 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.) Thermostat (Subbase Included) Auto Manual Changeover Changeover Weekday, Weekday, Sat, Sun Sat, Sun Auto T8611G1004 T8611R1000 Changeover T8611G1012 (° C) T8611R1042 (° C) 7-day T8611G1103 T8611R1141 T8611M7008 c (Premier White) (Premier White) T8611M7040
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T8611M SELECTION/APPLICATION 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.) Thermostat (Subbase Included) Auto Manual Changeover Changeover Weekday, Weekday, Sat, Sun Sat, Sun Auto T8611G1004 T8611R1000 Changeover T8611G1012 (° C) T8611R1042 (° C) 7-day T8611G1103 T8611R1141 T8611M7008 c (Premier White) (Premier White) T8611M7040
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T8611M INSTALLATION Installation COMPATIBILITY This thermostat requires a single transformer. A two- The T8611 Thermostats will replace most heat pump transformer system may require turning off two switches system thermostats. As long as ac power is continuously or disconnects, and rewiring to run the thermostat from a available to the thermostat, the thermostat will be compat- single transformer. Make sure the transformer has ad- ible with almost any low-volt control system. equate power (VA) f
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T8611M INSTALLATION Fig. 4—Removing thermostat from subbase. Use a 3/16 in. bit to drill the required holes. Gently tap The subbase mounts directly onto the wall with the anchors into holes until they are flush with the wall WALL screws and anchors included. Instead, the subbase can be REMOTE SENSOR mounted on a vertical or horizontal outlet box. If you must COVER WIRES mount the subbase on a vertical outlet box, order 193121A THROUGH Adapter Assembly. The assembly includes an adapter WALL O
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T8611M INSTALLATION terminals (Fig. 7) to assure thermostat/subbase contact. 7 1 L1 R (HOT) 4 POWER HIGH L2 SUPPLY LIMIT 3 C FAN AUX. HEAT SWITCH LED (GRN) MONITOR EM. HEAT ON LED (RED) L AUTO AUXILIARY HEAT RELAY W3 HEAT 3 STAGE 2 HEAT RELAY W2 HEAT 2 EMERGENCY HEAT RELAY SUBBASE THERMOSTAT LOGIC/ E LOGIC CONTROL CIRCUIT CIRCUIT FAN RELAY SYSTEM G SWITCH CHANGEOVER EM. HT. RELAY (COOL) HEAT O C.O. CHANGEOVER OFF RELAY (HEAT) AUTO B COOL COOL 1 C.O. STAGE 1 COMPRESSOR CONTACTOR Y HE
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T8611M INSTALLATION Fig. 7—Restrict wiring to recessed area surrounding terminals. 1 6 L1 R (HOT) 4 POWER HIGH L2 SUPPLY LIMIT 3 C FAN EM. HEAT AUX. HEAT MONITOR SWITCH LED (RED) LED (GRN) L ON AUTO W3 HEAT 3 STAGE 2 HEAT RELAY W2 HEAT 2 EMERGENCY HEAT RELAY SUBBASE THERMOSTAT LOGIC/ E LOGIC CONTROL CIRCUIT CIRCUIT FAN RELAY SYSTEM G SWITCH CHANGEOVER EM. HT. RELAY (COOL) O HEAT C.O. OFF CHANGEOVER RELAY (HEAT) AUTO B COOL COOL 1 C.O. STAGE 1 COMPRESSOR CONTACTOR Y HEAT 1 STAGE 2 COMP
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T8611M INSTALLATION 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, 1 7 L1 R (HOT) 4 HIGH POWER L2 LIMIT SUPPLY 3 C FAN AUX. HEAT SWITCH LED (GRN) MONITOR EM. HEAT LED (RED) ON L AUXILIARY AUTO HEAT RELAY W3 HEAT 3 W2 HEAT 2 EMERGENCY HEAT RELAY SUBBASE E THERMOSTAT LOGIC/ LOGIC C
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T8611M INSTALLATION EM.HT. and CHECK LEDs. Applies to 2-stage The Stage 1 cycle rate of this thermostat is factory-set heat/2-stage cool system in which both heating for heat pumps and cannot be adjusted. The auxiliary heat stages are compressorized. cycle rate can be adjusted by turning the cycle rate adjust- Fig.10—T8611M Thermostat with EM.HT.-HEAT- ment screw on the back of the thermostat. See Fig. 11. OFF-AUTO-COOL system and ON-AUTO fan Increasing the cycle rate will reduce room temperatur
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T8611M INSTALLATION • CHECKOUT Fig. 13—Mounting thermostat on subbase. Checkout COOLING CAUTION ! CAUTION ! During cold weather, some heat pumps will re- Do not operate cooling if outdoor temperature is quire that crankcase heater be energized several below 50° F [10° C]. Refer to manufacturer’s hours before operating heat pump. Refer to recommendations. manufacturer’s recommendations. NOTE: When cooling setting is changed, thermostat will HEATING wait up to five minutes before turning on the co
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T8611M CHECKOUT FAN System Press Look For This Response Move the system switch to OFF, and the fan switch to Switch This Key ON. The fan should run continuously. When the fan switch Position Key Down Key Released is in the AUTO position, fan cycles with the heating or CHANGE OFF 03 Blank TO LAST cooling system. PERIOD SKIP 07 Blank NEXT INSTALLER SELF-TEST (OPTIONAL) PERIOD PRESENT 15 Blank SETTING IMPORTANT: • Thermostat must have ac power to perform self-test. COOL or PRESENT 15 1st stage cool
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T8611M CHECKOUT • PROGRAMMING THE THERMOSTAT First Digit Degrees Clock (Hrs.) Third System Switch Sensor Digit Position Location 0F 12 0 COOL, AUTO or OFF Local 1F 24 1 HEAT or EM.HT. Local 2C 12 4 COOL, AUTO or COOL Remote 3C 24 5 HEAT or EM. HT. Remote M5346 Second Digit System Switch Position Nominal Cycle Rate Fourth (cph at 50% load 0 EM. HT., HEAT or OFF Digit for 3rd stage heat) 1 AUTO 46 2 COOL 53 Programming The Thermostat STEP 1 SET Press and release. The display shows PRESENT PM SETTI
