Honeywell T8611G Thermostat User Manual

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TRADELINE  
T8611G,R  
Chronotherm III  
Fuel Saver Thermostats  
The AUX. HT., EM. HT., and CHECK LEDS are located  
Application  
nearthebottomcenterofthesubbase.SeeTable1.TheAUX.  
HT. LED lights whenever the thermostat is calling for  
operation of the backup or auxiliary heater. Backup (auxil-  
iary)heatismoreexpensivetooperatethantheheatpumpand  
typically is used only when the heat pump is unable to handle  
the load. The EM. HT. LED lights whenever the thermostat  
system switch is in the EM. HT. position. The CHECK LED  
lights when something needs to be checked to maintain  
efficient operation of the system. Consult heat pump equip-  
ment literature to determine specific meaning of this LED.  
Heat and cool anticipation is fixed in all models; no  
adjustment is necessary. Cycle rates are adjustable for auxil-  
iary heating stage.  
These thermostats provide energy saving control for a 24  
Vac multistage heat pump heating/cooling system as indi-  
cated in Table 1 and are powered directly from the control  
transformer. All models have 5-1-1 programming.  
As long as AC power is continuously available to trans-  
former, the thermostat will be compatible with most control  
systems.  
The T8611G,R models include SYSTEM and ENRG  
SAV LEDs near the top front of the thermostat. The SYS-  
TEMLEDlightswhenthethermostatissignalingforheating  
or air conditioning. The ENGR SAV LED lights during the  
LEAVE and SLEEP periods.  
TABLE 1—Thermostat Models.  
Thermostat  
T8611G  
Stages  
Switching  
System  
EM.HEAT-  
HEAT-OFF-  
AUTO-COOL  
EM.HEAT-  
HEAT-OFF-  
COOL  
LEDs  
Changeover  
Terminals  
R, C/X, L,  
Comments  
See Fig.  
4
Heat Cool  
Fan  
ON-  
AUTO  
2
2
2
1
1
1
EM.HT,  
AUX.HT.  
Auto  
W ,E,G,O,  
2
B,Y,X2,X1  
R,C/X,L,  
T8611R  
ON-  
AUTO  
EM.HT.,  
AUX.HT.  
Manual  
Manual  
5
6
W ,E,W ,G,  
2 1  
O,B,Y,P  
R,B,X,W ,  
EM.HEAT-  
HEAT-OFF-  
COOL  
ON-  
AUTO  
EM.HT.  
Exact  
2
E,W ,G,O,  
replacement  
for York  
model no.  
1
1
H,Y  
2ET11700224.  
Installation  
CAUTION  
1. Disconnect power supply to prevent electri-  
cal shock or equipment damage.  
2. After wiring is complete, push excess wire  
back into the hole, and plug hole with  
nonhardening caulk, putty or insulation to  
prevent drafts from affecting thermostat op-  
eration.  
!
WHEN INSTALLING THIS PRODUCT...  
. Read these instructions carefully. Failure to allow  
1
them could damage the product or cause a hazardous condi-  
tion.  
2
. Check the ratings on the product to make sure the  
product is suitable for your application.  
. Installermustbeatrained, experiencedservicetechni-  
cian.  
3
4
. Allow thermostat to warm to room temperature before  
LOCATION  
operating.  
Installthermostatandsubbaseabout5ft.[1.5m]abovethe  
floorinanareawithgoodaircirculationatroomtemperature.  
Do not install the thermostat where it may be affected  
5
. After installation is complete, check out product op-  
eration as provided in these instructions.  
J.H. • 3-92 • © Honeywell Inc. 1992 • Form Number 69-0348—1  
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by—  
drafts or dead spots behind doors, in corners or under  
cabinets.  
Fig. 2—Mounting subbase on wall.  
hot or cold air from ducts.  
WALL  
radiant heat from sun or appliances  
concealed pipes and chimneys.  
unheated (uncooled) areas behind the thermostat, such  
as an outside wall.  
WIRES THROUGH  
WALL OPENING  
WALL  
ANCHORS  
(2)  
IF REPLACING AN EXISTING THERMOSTAT  
Turn off power to thermostat at furnace or heat pump. A  
two-transformersystemmayrequireturningofftwoswitches  
or disconnects. Remove any existing wallplate or subbase  
from the wall. Label or write down each wire color with the  
letterornumberonthewiringterminalasthewireisremoved,  
to avoid miswiring later.  
MOUNTING  
HOLES  
IF NEW INSTALLATION  
Run acabletoa holeattheselectedwall location, andpull  
about 3 in. [76 mm] of wire through the opening. Color-  
coded, 8-gaugethermostatcablewithoneconductorforeach  
wiring terminal is recommended. Good service practice  
recommends selecting cable with one or two more conduc-  
tors than the immediate application requires.  
MOUNTING  
SCREWS (2)  
SUBBASE  
M5175  
MOUNTING SUBBASE  
The subbase does not require leveling for proper opera-  
tion, but for appearance only.  
WIRING  
All wiring must comply with local electrical codes and  
ordinances.  
Remove thermostat from subbase, see Fig. 1.  
Thesubbasemountsdirectlyontothewallwiththescrews  
included in the package. Use the subbase as a template, and  
with a pencil, mark the two mounting screw positions, see  
Fig. 2. Use 3/16 in. bit to drill holes for anchors. Gently tap  
anchors into holes until they are flush with the wall surface.  
Threadwiresthroughthecenteropeningofthesubbase.Then  
mountthesubbaseusingtwoscrewsprovided.Gentlytighten  
screws level top surface of subbase, then securely tighten  
screws.  
Disconnect power before wiring to prevent electrical  
shock or equipment damage.  
The shape of the terminal barrier permits insertion of  
straight or conventional wraparound wiring connections.  
Either method is acceptable.  
Refer to Figs. 4-6 for typical hookups of subbase and  
thermostat.  
NOTE: Keep all wiring restricted to ribbed area surround-  
ing terminals to assure thermostat/subbase contact, see  
Fig. 3.  
Fig. 1—Removing thermostat from subbase.  
Fig. 3—Keep wiring restricted to ribbed area  
surrounding terminals.  
FOR STRAIGHT INSERTION –  
STRIP 5/16 in. [8 mm]  
SYSTEM  
RESTRICT  
WIRING TO  
THIS AREA  
FOR WRAPAROUND –  
STRIP 7/16 in. [11 mm]  
FRONT VIEW OF  
TERMINAL AREA  
EM. HT. HEAT OFF AUTO COOL  
FAN  
WIRING TO BE BELOW  
THIS SURFACE  
TOP SURFACE  
OF SUBBASE  
ON  
AUTO  
AUX. HEAT  
CHECK  
M5179A  
CROSS-SECTIONAL VIEW OF  
TERMINAL AREA  
M3062  
2
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Fig. 4—T8611G 2-stage heat/1-stage cool thermostat.  
1
L1  
L2  
(
HOT)  
2
R
POWER  
SUPPLY  
HIGH  
LIMIT  
C/X  
EM. HEAT  
LED (RED)  
AUX. HEAT  
LED (GRN)  
FAN  
L
SWITCH  
MONITOR  
ON  
W2  
E
SUBBASE  
AUTO  
THERMOSTAT  
LOGIC  
LOGIC/  
HEAT 2  
AUXILIARY  
CONTROL  
CIRCUIT  
HEAT RELAY  
CIRCUIT  
EMERGENCY  
HEAT RELAY  
SYSTEM  
SWITCH  
EM. HT.  
HEAT  
G
O
FAN RELAY  
OFF  
C.O.  
C.O.  
AUTO  
CHANGEOVER  
RELAY (COOL)  
COOL  
B
HIGH  
LIMIT  
COOL  
CHANGEOVER  
RELAY (HEAT)  
HEAT 1  
Y
COMPRESSOR  
CONTACTOR  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
DENOTES THERMOSTAT TO SUBBASE INTERCONNECT.  
X1  
CHECK LED  
3
(
YELLOW)  
POSSIBLE CHECK LED CIRCUITS:  
X2  
X1  
TO R  
X1  
TO R  
X1  
L1  
CHECK  
LED  
CHECK  
LED  
CHECK  
LED  
(HOT)  
FAULT DETECTION  
SWITCH  
SWITCHING  
DEVICE  
FAULT DETECTION  
(
YELLOW)  
(YELLOW) SWITCH  
X2  
(YELLOW)  
X2  
1
24 Vac  
X2  
TO C/X  
TO C/X  
L2  
SWITCH TO R (POWER) SIDE OF  
SYSTEM TRANSFORMER  
SWITCH IN SECONDARY OF  
SEPARATE TRANSFORMER  
M 6020  
SWITCH TO C (COMMON) SIDE  
OF SYSTEM TRANSFORMER  
3
69-0348—1  
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Fig. 5—T8611R 2-stage heat/1-stage cool thermostat.  
1
L1  
L2  
(
HOT)  
3
R
POWER  
SUPPLY  
HIGH  
LIMIT  
C/X  
EM. HEAT  
LED (RED)  
AUX. HEAT  
LED (GRN)  
FAN  
L
SWITCH  
MONITOR  
ON  
W2  
E
SUBBASE  
LOGIC/  
AUTO  
THERMOSTAT  
LOGIC  
AUXILIARY  
HEAT 2  
CONTROL  
CIRCUIT  
HEAT RELAY  
CIRCUIT  
EMERGENCY  
HEAT RELAY  
SYSTEM  
W1  
G
SWITCH  
EM. HT.  
HEAT  
STAGE 1  
HEAT RELAY  
FAN RELAY  
OFF  
2
O
COOL  
CHANGEOVER  
RELAY (COOL)  
B
HIGH  
LIMIT  
CHANGEOVER  
RELAY (HEAT)  
HEAT 1  
Y1  
P
COOL  
COMPRESSOR  
CONTACTOR  
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
REMOVE JUMPER FOR SYSTEM WITH ISOLATED STAGE 1 HEATING AND COOLING CONNECTIONS.  
DENOTES THERMOSTAT TO SUBBASE INTERCONNECT.  
DEFROST  
CONTROL  
M 6019  
4
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Fig. 6—T8611R 2-stage heat/1-stage cool thermostat. Exact replacement for York model no. 2ET11700224.  
R
L1  
POWER  
SUPPLY  
(HOT)  
HIGH  
LIMIT  
1
L2  
5
B
TRANSFORMER  
3
EM. HEAT  
LED (RED)  
X
FAN  
MONITOR  
SWITCH  
ON  
W2  
SUBBASE  
LOGIC/  
THERMOSTAT  
LOGIC  
4
AUXILIARY  
AUTO  
CONTROL  
CIRCUIT  
HEAT 2  
HEAT RELAY  
CIRCUIT  
E
EMERGENCY  
HEAT RELAY  
SYSTEM  
W1  
G
SWITCH  
EM. HT.  
HEAT  
STAGE 1  
HEAT RELAY  
FAN RELAY  
OFF  
2
AUTO  
O
CHANGEOVER  
RELAY (COOL)  
H
HIGH  
LIMIT  
CHANGEOVER  
RELAY (HEAT)  
COOL  
HEAT 1  
Y1  
COMPRESSOR  
CONTACTOR  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD  
PROTECTION AS REQUIRED.  
NOTE: THIS DIAGRAM IS FOR USE WHEN REPLACING ONLY YORK  
THERMOSTAT MODEL NO. 2ET11700224. USING THIS  
DRAWING FOR OTHER INSTALLATIONS CAN RESULT IN  
DAMAGE TO THERMOSTAT.  
REMOVE JUMPER FOR SYSTEM WITH ISOLATED STAGE 1 HEATING  
AND COOLING CONNECTIONS.  
3
4
5
DENOTES THERMOSTAT TO SUBBASE INTERCONNECT.  
REMOVE JUMPER FOR SYSTEM WITH ISOLATED EMERGENCY HEAT.  
TRANSFORMER COMMON IS CONNECTED TO B TERMINAL.  
M3206  
Fig. 7—Cycle rate adjustment.  
Fig. 8—Battery placement.  
BATTERY PLACEMENT  
NOTE CORRECT PLUS  
AND MINUS DIRECTION) M372A  
(
The cycle rate of this thermostat is factory-set for heat  
pumps.Theheatpumpcompressorcycleratecanbeadjusted  
byturningthecyclerateadjustmentscrewlocatedontheback  
of the thermostat, see Fig. 7.  
CYCLE RATE ADJUSTMENT  
To custom-tailor the thermostat’s cycling performance to  
different types of heating equipment, a cycle rate adjustment  
screw is provided on the back of the thermostat. Correct  
setting of this screw will provide optimum savings.  
INSTALLING BATTERIES  
Three AAA alkaline batteries are provided as backup to  
prevent program loss in event of power outage. Batteries are  
included with thermostat. Install batteries in back of thermo-  
stat as shown in Fig. 8.  
NOTE: Most applications will not require a change in  
cycle rate.  
Withoutbatterybackup,theprogramwillremainabout20  
seconds in event of power loss. When batteries are first  
installed, the display will flash 1:00 PM and 32°.  
Theroomairtemperaturewillnormallyvaryslightlyfrom  
the comfort temperature setting with the cycling of the heat  
pump or auxiliary heater.  
5
69-0348—1  
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When the batteries are low, the display will flash REPL  
BAT. Homeownerwillhave20-30secondstoreplacebatter-  
ies after removing batteries from thermostat. After 20-30  
seconds, it will be necessary to reprogram. REPL BAT  
indication will be disappear when thermostat is mounted  
back on the powered subbase.  
Fig. 9—Mounting the thermostat on subbase.  
MOUNTING THE THERMOSTAT  
WithsystemswitchsettoOFF,hangthethermostatonthe  
tabsatthetopofthesubbase(Fig.9A).Swingdownandpress  
on lower edge until thermostat snaps in place  
(Fig. 9B). Open cover and tighten the captive mounting  
screws (Fig. 9C).  
SETTING DAY AND TIME  
Restore 24V power to the thermostat. When power is  
applied to the thermostat, the display will read 1:00 PM and  
roomtemperature. Itwillgooffforafewseconds, thenbegin  
to flash on and off. Set present day and time.  
SET  
PRESENT  
DAY/TIME  
Press  
.
Press  
DAY  
to set the current day. Each press of the  
DAY key advances the display one day.  
BACK  
Press TIME AHEAD  
or  
to set the current time.  
If the display will not come on.  
check mounting of thermostat to subbase. If loose or  
misaligned, remove thermostat and reinstall on the  
subbase, making sure it is firmly attached.  
check to see that system power is on.  
checkvoltagebetweenRandC/X;itshouldbe20to30  
Vac.  
Checkout  
CAUTION  
!
Duringcoldweather, someheatpumpswillrequire  
that crankcase heater be energized several hours  
beforeoperatingheatpump.Refertomanufacturer’s  
recommendations.  
NOTE: When cooling setting is changed, thermostat will  
wait up to 5 minutes before turning on the cooling equip-  
ment. This delay protects the compressor.  
HEATING  
When heating setting is changed, thermostat will wait up  
to 5 minutes before turning on the heating equipment. This  
delay protects the compressor.  
Move the system switch to HEAT and the fan switch to  
AUTO. Press WARMER key until the setting is about  
Move the system switch to COOL and the fan switch to  
AUTO. Press COOLER key until the setting is about  
10° F [6° C] below room temperature. The cooling equip-  
ment and fan should start. Press WARMER key until the  
setting is about 10° F [6° C] above room temperature. The  
cooling equipment and fan should stop.  
1
0° F [6° C] above room temperature. Heating should start  
and the fan should run (there may be a delay of  
-10minutesbeforeheatturnson). PressCOOLERkeyuntil  
5
NOTE: On an AUTO changeover thermostat, the heating  
temperature must be set at least 3° F [1.7° C] below the  
cooling temperature, or display will flash.  
thesettingisabout10°F[6°C]belowroomtemperature.The  
heating equipment and fan should shut off.  
NOTE: On an AUTO changeover thermostat, the cooling  
temperature must be set at least 3° F [1.7° C] above the  
heating temperature, or display will flash.  
FAN  
MovethesystemswitchtoOFF,andthefanswitchtoON.  
The fan should run continuously. When the fan switch is in  
the AUTO position, fan cycles with the heating or cooling  
system.  
COOLING  
CAUTION  
!
INSTALLER SELF-TEST (OPTIONAL)  
Do not operate cooling if outdoor temperature is  
below 50° F [10° C]. Refer to manufacturer’s  
recommendations.  
NOTE: Thermostat must have AC power to perform self-  
test.  
6
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Perform the following test as a check of all thermostat  
functions. If thermostat does not respond as indicated, ther-  
mostat must be replaced.  
System  
Switch  
Position  
Press  
This  
Key  
Look for this  
Response  
1. Press AHEAD and BACK keys at the same time.  
Key Down  
Key Released  
While holding keys down, all segments of the display should  
be on, see Fig. 10.  
OFF  
CHANGE  
TO LAST  
PERIOD  
03  
07  
15  
Blank  
Blank  
Blank  
2
. SetsystemswitchtoOFF.PressAHEADandBACK  
SKIP  
NEXT  
PERIOD  
and PRESENT SETTING keys at the same time to enter  
self-test.  
PRESENT  
SETTING  
3
. Press each key as listed below, and look for response  
listed, as key is held down and released.  
COOL or  
AUTO (with  
fan in AUTO)  
PRESENT  
SETTING  
15  
15  
Cooling, fan and  
SYSTEM LED on.  
Fig. 10—All segments on display.  
REPL  
PRESENT  
SETTING  
Cooling, fan and  
SYSTEM LED off.  
AM  
SET  
PT  
PM BAT  
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON  
WAKE LEAVE RETURN SLEEP TEMPORARY  
OFF  
06  
02  
Blank  
Blank  
Blank  
Blank  
Blank  
Blank  
WARMER  
COOLER  
M410C  
0
5
AHEAD  
BACK  
04  
0
0
1
1
0
2
LEAVE  
RETURN  
WAKE  
(CHECK  
See note  
Blank  
A
EACH  
POSITION)  
OFF  
08  
SLEEP  
1
3
Microprocessor  
mask no. and  
revision no.  
DAY  
SET  
HEAT/COOL  
09  
14  
14  
14  
14  
14  
10  
11  
Blank  
SET  
PRESENT  
DAY/TIME  
Blank  
1
st stage heating,  
HEAT or  
AUTO  
SET  
PRESENT  
DAY/TIME  
fan and SYSTEM  
LED on.  
(with fan  
2
nd stage heating  
SET  
PRESENT  
DAY/TIME  
in AUTO)  
and AUX. HEAT  
LED also on.  
2
nd stage heating  
SET  
PRESENT  
DAY/TIME  
and AUX. HEAT  
LED off.  
1
st stage heating,  
SET  
PRESENT  
DAY/TIME  
fan and SYSTEM  
LED off.  
OFF  
HOLD  
TEMP  
Blank  
Normal operating  
display.  
RUN  
PROGRAM  
END SELF-TEST  
A
HEAT displayed when system switch is in HEAT, COOL  
when in COOL, HEAT or COOL when in AUTO, neither  
when in OFF. Also, a four-digit code is displayed, with each  
digit explained on the next page.  
7
69-0348—1  
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4
-DIGIT CODE EXPLANATION  
Second  
Digit  
Clock  
(Hrs.)  
Degrees  
Cycle Rate Setting  
(CPH at 50% on time,  
2nd stage heat)  
0
1
4
5
12  
12  
24  
24  
F
C
F
First  
Digit  
0
4
or 2  
or 6  
6
3
C
M 524  
Third  
Digit  
System  
Switch Position  
System  
Switch  
Position  
Fourth  
Digit  
Thermostat  
Type No.  
0
2
4
HEAT, EM.HT, or OFF  
AUTO  
COOL  
0
1
R
G
COOL, OFF  
COOL,  
AUTO or  
OFF  
2
3
R
G
EM.HT.  
or HEAT  
AUTO,  
EM.HT. or  
HEAT  
Refer to Owner’s Manual for programming instructions and  
homeowner troubleshooting.  
This equipment is a Class B digital apparatus which complies with Canadian Radio Interference Regulations, CRCc. 1374.  
Home and Building Control  
Honeywell Inc.  
Home and Building Control  
Honeywell Limited—Honeywell Limitée  
740 Ellesmere Road  
Helping You Control Your World  
1
985 Douglas Drive North  
Golden Valley, Minnesota 55422  
Scarborough, Ontario  
M1P 2V9  
QUALITY IS KEY  
Printed in TAIWAN, R.O.C.  

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