Honeywell 191108AC Thermostat User Manual

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T8095A/191108AJ/Q682B  
Heating, Cooling and Heating/Cooling  
Thermostat, Wallplate, and Subbase;  
TS8095A/191108AC Heating-Only  
Thermostat and Wallplate  
Installation Instructions for the Trained Service Technician.  
NOTE: Order Q682B Subbase separately.  
Preparation  
Check thermostat and subbase (if used) suitability for the  
heating, cooling, or heating/cooling system. Refer to Table 1.  
Assemble tools required: flat bladed screwdriver, hand or  
power drill with 3/16-in. drill bit, wire cutter/stripper or  
sharp knife, bubble level or plumb bob and line.  
Assure power is off to the heating, cooling, or heating/  
cooling system at the main fuse panel. Most buildings have  
a separate switch box or circuit breaker for disconnecting  
power to the heating and cooling (if applicable) equipment.  
This thermostat is compatible with most heating, cooling  
or heating/cooling systems. Refer to Table 1 for thermostat  
and system compatibility information.  
Recycling Notice  
This control contains mercury in a sealed tube. Do not  
place control in the trash at the end of its useful life.  
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 in-  
structions regarding recycling and the proper disposal of this  
control, or of an old control containing mercury in a sealed  
tube.  
If you have questions, call Honeywell Inc. at 1-800-  
4
68-1502.  
TABLE 1—SYSTEM COMPATIBILITY.  
Type of Heating System  
to be Controlled  
Conditions/Compatibility  
Electric (Line Voltage)—  
typical baseboard and radiant  
• The R8239D1015 Isolating Relay or R841 Silent Switching Center must be  
installed in the thermostat control circuit.  
a
Fan Coil Unit  
• Compatible. Assure correct subbase identity is selected for fan control.  
Gas—Direct Spark Ignition  
• Compatible. If not using battery backup, assure that 24V control transformer  
DSI), Intermittent Pilot (IP), common is accessible for connection to thermostat cable conductor and power to  
the transformer is not regularly interrupted by high temperature or limit operation.  
(
and Standing Pilot (SP)  
Heat Pump  
• Compatible. Assure correct subbase identity is selected for fan control and  
changeover control (O terminal for cool and B terminal for heat).  
Hot Water Zone  
• Honeywell 2-wire valves are compatible.  
Some non-Honeywell 2-wire valves require an R8239D1015 Isolating Relay in  
the thermostat control circuit.  
a
Some 3-wire valves require an R8239A1052 Isolating Relay in the thermostat  
control circuit.  
a, b  
Oil  
• If not using battery backup, assure that the 24V control transformer common is  
accessible for connection to thermostat cable conductor and power to transformer  
is not regularly interrupted by high temperature, purge cycle, or limit operation.  
Vent Damper  
Warm Air Zone  
• Honeywell damper motors are compatible.  
Some non-Honeywell damper motors require an R8239D1015 Isolating Relay in  
the thermostat control circuit. Check control amperage requirement.  
a
• Most are compatible.  
a
If thermostat is not compatible with the system being controlled, the system will not operate. No hazard exists. The thermo-  
stat will not be damaged unless it is used to directly control a line voltage system. For proper system operation, a Honeywell  
R841 or R8239D1015 Isolating Relay must be added to the thermostat control circuit.  
Consult manufacturer for installation requirements.  
b
D.F. • Rev. 11-94 • ©Honeywell Inc. 1994 • Form Number6 9-06381  
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Installation  
Fig. 1—Unpack thermostat.  
WHEN INSTALLING THIS PRODUCT…  
. Read these instructions carefully. Failure to follow  
them could cause a hazardous condition.  
. Installer must be a trained experienced service technician.  
. After installation is complete, check out product op-  
THERMOSTAT  
COVER  
1
80  
60 70  
50  
2
3
1
2
3
eration as provided in these instructions.  
9
6
LIFT  
COVER  
IMPORTANT: An incorrectly leveled subbase will cause  
the temperature control to deviate from setpoint. It is  
not a calibration problem.  
CAPTIVE  
MOUNTING  
SCREWS  
THERMOSTAT  
BASE  
M1518  
CAUTION  
1
. Disconnect power supply to prevent electrical  
shock or equipment damage.  
2
. To prevent interference with the thermostat  
linkage, keep wire length to a minimum and run  
wires as close as possible to the subbase.  
. Do not overtighten thermostat captive mount-  
ing screws because damage to subbase threads  
can result.  
Pullwiresthroughthelargewiringholeinthewallplateor  
subbase.  
Loosely fasten the wallplate or subbase to the wall with  
the three screws. Do not completely tighten the screws.  
Carefully level the wallplate or subbase (Fig. 3), and  
firmly tighten the screws.  
3
4
. Do not short across coil terminals on relay. This  
can burn out the thermostat heat anticipator.  
Fig. 2—Mounting wallplate or subbase to wall.  
LOCATION  
Locate thermostat about 5 ft [1.5m] above the floor in an  
area with good air circulation at average temperature.  
Do not mount the thermostat where it may be affected by:  
3
SCREW HOLES  
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.  
WITH PLASTIC  
ANCHORS  
O
Run wires from the heating, cooling or heating/cooling  
equipment to the new thermostat location.  
Refer to the Typical Wiring Diagrams section to deter-  
mine the number of wires required for your application.  
B
R
G
W
Y
FAN  
OFF COOL  
ON  
AUTO  
HEAT  
UNPACK THERMOSTAT  
HEATING/COOLING SUBBASE  
Handle your new thermostat carefully; rough handling  
may interfere with its accuracy. Before unpacking, refer to  
Fig. 1.  
M1552A  
Remove and discard the shipping wrap.  
3
SCREW HOLES  
IMPORTANT: Save package of screws and instructions  
WITH PLASTIC  
ANCHORS  
for the homeowner.  
Remove the thermostat cover by lifting from the bottom.  
Set aside cover until needed later.  
WALLPLATE  
Carefully remove the material protecting the mercury  
switch bulb.  
Loosen two captive mounting screws and separate wall-  
plate (if provided) from the back of the thermostat base.  
MOUNT WALLPLATE OR SUBBASE  
Wall Mounting (Fig. 2)  
Hold wallplate or subbase in position on the wall (Fig. 2).  
Mark holes on the wall for anchors. Use spirit level to  
make sure the wallplate or subbase is level.  
Drill 3/16-in. holes, and gently tap anchors into holes  
until flush with the wall.  
M1815  
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WIRE WALLPLATE OR SUBBASE  
Fig. 3—Leveling methods for wallplate or  
subbase.  
Follow the instructions provided by the heating, cooling,  
or heating/cooling equipment manufacturer. If not avail-  
able, refer to the Typical Wiring Diagrams section at the end  
of this publication.  
Disconnect the power supply before making wiring con-  
nections to prevent electrical shock or equipment damage.  
SPIRIT LEVEL  
NOTE: All wiring must comply with local electrical codes  
and ordinances.  
PLUMB  
LINE  
O
This thermostat clock can be powered by a 24-Vac trans-  
former with battery backup. Refer to Figs. 15 and 16 for  
hookup diagrams of typical powering applications.  
B
R
G
W
Y
Wallplate (Heating or Cooling Systems)  
Refer to Fig. 5 and strip the thermostat wire insulation as  
necessary.  
PLUMB  
BOB OR  
WEIGHT  
FAN  
COOL  
ON  
AUTO  
HEAT  
OFF  
M1555  
For heating-only systems, connect wires to R, W, and C  
if applicable) terminals. See Fig. 17. For cooling-only sys-  
(
tems, connect wires R, Y, and C (if applicable) terminals.  
Firmly tighten the screws.  
Outlet Box Mounting (Fig. 4)  
Use a horizontally mounted outlet box if possible. If a  
vertical outlet box is used, mount the wallplate or subbase on  
a 193121A Cover Plate Assembly (ordered separately). Fol-  
low the instructions provided with the cover plate assembly.  
Align the wallplate or subbase mounting holes on the  
outlet box and loosely fasten with two screws.  
Push excess wire back into the wall.  
Plug the hole in the wall with nonhardening caulk, putty,  
or nonflammable insulation to prevent drafts from affecting  
thermostat operation.  
Subbase (Heating/Cooling Systems)  
Refer to Fig. 5 and strip the thermostat wire insulation as  
necessary.  
Carefully level the wallplate or subbase (Fig. 3), and  
firmly tighten the screws.  
Fig. 4—Mounting wallplate or subbase on horizontal outlet box.  
EXISTING  
EXISTING  
HORIZONTAL  
OUTLET BOX  
HORIZONTAL  
OUTLET BOX  
O
R
B
R
W
W
HEATING/  
G
COOLING  
SUBBASE  
WALLPLATE  
Y
FAN  
OFF COOL  
ON  
AUTO  
HEAT  
M1816  
M1553A  
VERTICAL  
OUTLET  
BOX  
1
2
COVER  
PLATE  
ADAPTER  
RING  
2
R
W
G
SUBBASE OR  
WALLPLATE  
MOUNTING  
SCREWS (2)  
1
2
NOT INCLUDED WITH UNIT.  
M1554A  
ACCESSORY PARTS AVAILABLE.  
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Connect the wires to the corresponding terminals on the  
subbase(orderedseparately). Iflabelsdonotagreewithyour  
newsubbase, refertoTable2andtheinstallationinstructions  
furnished with the subbase.  
Hang the thermostat base on the wallplate or subbase.  
Insert the two captive mounting screws located in the bot-  
tom corners of the base (Fig. 6).  
Firmly tighten the screws.  
NOTE: If wiring a dual transformer system, only the O or  
the B terminal may be used.  
INSERT CLOCK BATTERIES  
Power is supplied to the clock by the 24-Vac transformer.  
Backup batteries (not included) may be installed to supply  
power to the clock if power is interrupted.  
Push excess wire back into the wall.  
Plug the hole in wall with nonhardening caulk, putty, or  
nonflammable insulation to prevent drafts from affecting  
thermostat operation.  
Install the batteries in the thermostat (Fig. 7).  
Once a year or when batteries are dead, replace with two  
new AAA alkaline batteries. Properly dispose of old batter-  
ies. We recommend Energizer® batteries.  
Fig. 5—Methods of connecting terminals.  
Fig. 6—Thermostat mounting.  
FOR STRAIGHT  
CONNECTION—  
STRIP 5/16 in. [8 mm]  
FOR WRAPAROUND  
CONNECTION—  
STRIP 7/16 in. [11 mm]  
BARRIER  
TAB (2)  
MOUNTING SLOT (2)  
M1556B  
1
TABLE 2—TERMINAL DESIGNATIONS.  
Subbase  
Terminal  
Control  
Function  
35  
30  
2
20  
10  
5
R
Control transformer power.  
Rc  
Line side of 24V power supply;  
cooling side, 2 transformer heat-cool  
system.  
Rh  
Line side of 24V power supply;  
heating side, 2 transformer heat-cool  
system.  
THERMOSTAT  
BASE  
WALLPLATE  
OR SUBBASE  
CAPTIVE  
MOUNTING SCREWS  
M8584  
W
Y
Heating control circuit.  
Fig. 7—Insert clock batteries.  
Cooling control circuit; jumper to W  
for heat pump compressor control if  
no P terminal on subbase.  
BATTERY LOCATION FOR  
(2) AAA BATTERIES;  
INSTALL WITH POSITIVE  
ENDS UP  
G
C
O
Fan control circuit.  
Clock control (transformer common).  
Cooling damper or changeover/  
reversing valve, makes continuously  
in cool.  
B
P
Heating damper or changeover/  
reversing valve, makes continuously  
in heat.  
Heat pump contactor; P terminal on  
some models only.  
M7188  
MOUNT THE THERMOSTAT  
Note the tabs on the top inside edge of the thermostat  
base. These tabs fit the slots molded into the top of the wall-  
plate or subbase.  
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SET HEAT ANTICIPATOR  
Fig. 8—Set clock.  
Adjust the heat anticipator lever to match the current  
ratingoftheprimarycontrolforthepropercyclerate(Fig. 9).  
Adjustable anticipation must be set for total current of  
heat and fan control.  
PROGRAM DIAL  
The current rating is usually stamped on the control or  
valve (Fig. 10), or a setting may be given in the device  
instructions.  
MINUTE  
HAND  
If no current rating or heat anticipator setting is given,  
measure the current with an ammeter. Proceed with the fol-  
lowing steps.  
Remove the thermostat from the wallplate or subbase.  
Connect an ac ammeter of appropriate range (about 0A to  
A) between the R and W terminals on the wallplate or sub-  
TIME  
INDICATOR  
ARROW  
2
base except for electric heat and heat pump systems.  
Let the system operate for one minute.  
Adjust the heat anticipator lever to match the number that  
reads on the ammeter.  
M1813A  
ATTACH THERMOSTAT COVER  
Make sure the packing inserts in the thermostat base are  
removed.  
Place the two tabs on the upper edge of the cover into the  
mounting slots in the thermostat base (Fig. 11).  
Swing the cover downward until it catches at the bottom  
of the base.  
SET CLOCK  
Adjust the clock by moving the minute hand in a clock-  
wise  
direction. Do not reverse the minute hand.  
When time is correctly set, the time indicator arrow (tri-  
angle shape) points to the correct time and the corresponding  
daytime(light)ornighttime(dark)portionoftheprogramdial.  
Fig. 11—Attach cover.  
Fig. 9—Adjust heat anticipator.  
12  
9
3
50 60  
7
0
80  
6
ANTICIPATOR  
SCALEPLATE  
M1519  
ANTICIPATOR  
SETTING LEVER  
M7317  
Fig. 10—Current rating of primary control.  
OIL BURNER CONTROL  
SHOWS  
CURRENT  
DRAW  
SHOWS  
VOLTAGE  
RATING  
SHOWS LOW  
VOLTAGE  
30 VAC  
V8043E 1004 4  
0.2 AMP  
2
4V 50/60CY  
SHOWS  
ANTICIPATOR  
SETTING  
.32 AMP @ 60CY  
SHOWS  
VOLTAGE  
RATING  
T
T
TO  
BURNER  
F
F
24 Vac 50/60 Hz  
0.4 AMP  
FROM MAIN  
SHOWS  
FUEL SUPPLY  
ANTICIPATOR  
SETTING  
ZONE VALVE  
M6116A  
TYPICAL GAS VALVE  
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SET TEMPERATURE CONTROL LEVERS  
The two levers on top of the thermostat control the low  
and high temperatures for energy savings and comfort con-  
trol (Fig. 12). The lever on the left (blue mark) controls the  
lower temperature. The lever on the right (red mark) controls  
the higher temperature.  
Operate the entire heating system at least one complete  
cycle.  
If thermostat fails any test, refer to the Troubleshooting  
Guide in the Owner’s Manual.  
Reset both the temperature setting levers to the desired  
temperatures.  
We recommend pushing the levers together at an appro-  
priate temperature for either heat or cool until the occupant  
programs the thermostat and makes the final temperature  
selections.  
COOLING-ONLY SYSTEM (T8095A ONLY)  
Turn on power to the cooling equipment.  
Push both temperature setting levers together at least 5° F  
[
3° C] below the room temperature. The cooling equipment  
will operate, and the fan will start. Allow for any time delay  
that may be built into the compressor control circuit.  
Fig. 12—Temperature control levers.  
LOW TEMPERATURE  
BLUE MARK)  
SET LEVER  
HIGH TEMPERATURE  
(RED MARK)  
SET LEVER  
NOTE: To avoid compressor damage, do not operate the  
system when outdoor temperature is below 50°F [10°C].  
Refer to manufacturer recommendations.  
(
Move both levers 5° F [3° C] above room temperature.  
The cooling equipment and the fan should shut off.  
Operate the entire cooling system at least one complete  
cycle.  
50  
60 70  
80  
If thermostat fails any test, refer to the Troubleshooting  
Guide in the Owner’s Manual.  
M859  
Reset both the temperature setting levers to the desired  
temperatures.  
SET SUBBASE SWITCHES (IF APPLICABLE)  
The subbase system switch controls system operation as  
follows:  
HEAT: Heating system is controlled by the thermostat.  
Cooling system is off.  
HEATING/COOLING SYSTEM  
Turn on power to the furnace and cooling system.  
Place the system switch lever to HEAT and fan switch  
lever to AUTO.  
COOL: Cooling system is controlled by the thermostat.  
Heating system is off.  
OFF: Both the heating and cooling systems are off. If the  
fan switch is in the AUTO position, the fan is also off.  
The subbase fan switch controls fan operation as follows:  
ON: Fan operates continuously.  
AUTO: Fan operates with the cooling equipment as con-  
trolled by the thermostat or with the heating equip-  
ment as controlled by the plenum switch. In electric  
heat, heat pump and fan coil systems, the fan is con-  
trolled by the thermostat in heating and cooling.  
To switch positions, use thumb or index finger to slide  
lever to the desired position. For proper circuit operation,  
switch lever must stop in detent over the desired function  
indicator mark.  
Push both temperature setting levers together at least 5° F  
[3° C] above room temperature. The main burner should  
come on. The fan will start when the furnace heats up. (If  
central electric heat, fan coil or heat pump system, fan starts  
immediately.)  
Move both levers 5° F [3° C] below room temperature.  
The burner should shut off.  
PlacethesystemswitchlevertoCOOLandthefanswitch  
lever to AUTO. The cooling equipment will operate, and the  
fan will start. Allow for any time delay that may be built into  
the compressor control circuit.  
NOTE: To avoid compressor damage, do not operate the  
system when outdoor temperature is below 50°F [10°C].  
Refer to manufacturer recommendations.  
Move both temperature setting levers together at least 5° F  
3° C] above the room temperature. The cooling equipment  
should shut off.  
[
Checkout  
Place the fan switch to ON. The fan should run continu-  
ously with the system switch in any position.  
Place the system switch to OFF. Move both temperature  
setting levers to various positions. The heating and cooling  
systems should not operate.  
Operate the entire system for at least one complete cycle  
with the system switch at COOL and one complete cycle  
with the switch at HEAT.  
If thermostat fails any test, refer to the Troubleshooting  
Guide in the Owner’s Manual.  
Reset both the temperature setting levers to the desired  
temperatures.  
Leave Owner’s Manual and Assistance Information in a  
convenient place for the building occupant or provide with  
other appliance manuals.  
CAUTION  
Do not check operation by shorting across termi-  
nals of system controls. This will damage the heat  
anticipator.  
HEATING-ONLY SYSTEM  
Turn on power to the furnace.  
Push both temperature setting levers together at least 5° F  
3° C] above the room temperature. The main burner should  
come on. The fan will start when the furnace heats up.  
Move both levers 5° F [3° C] below the room tempera-  
ture. The burner should shut off.  
[
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To check thermostat calibration, allow several hours of  
operation after installation. Then read thermometer and re-  
move cover. Push temperature levers together to a setting  
below room temperature. Slowly move them up the scale  
together until the mercury slides across the tube. If the  
thermometer reading and the high temperature lever posi-  
tion are approximately the same at the instant the mercury  
moves to the other end, no recalibration is needed.  
Calibration  
NOTE: Select models can be calibrated.  
THERMOMETER  
The thermometer in your thermostat was accurately cali-  
brated at the factory. The thermometer should need adjust-  
ment only if it has been dropped or shifted due to mishandling.  
If the setpoint lever and the thermometer reading do not  
agree:  
. Remove the thermostat cover by pulling up from the  
bottom of cover until it clears the mounting slots.  
. Set the thermostat cover on a table near an accurate  
thermometer.  
If calibration is necessary, proceed as follows:  
1
. Remove the cover.  
2. Place open-end calibration wrench, part no. 104994A  
1
(
ordered separately), on the hex nut under the bimetallic coil  
controlled by the red lever (Fig. 14). Hold lever so it does not  
2
move, and gently turn the wrench clockwise  
until the  
mercury rests securely in the right end of the tube.  
3
. Allow five minutes for cover thermometer to sense  
area temperature; compare the readings. Be careful not to  
3
. Put the thermostat cover on and wait 10 minutes.  
4. Read the thermometer. Then remove the cover. Mov-  
touch thermometer or breathe on it.  
4
ing both levers, place the HIGH lever at the thermometer  
reading. Hold lever so it does not move, and gently turn the  
. If the readings are the same, replace cover and put the  
system into operation.  
. If the readings are different, insert a small screwdriver  
in the thermometer and turn it until the thermometers have  
the same reading (Fig. 13).  
wrench counterclockwise  
until the mercury just slides  
5
to the left end of the tube but no farther. Try to do this quickly  
so the heat from your hands does not affect the thermostat.  
5. Repeat this procedure for the blue lever.  
6
. Replace thermostat cover and put the system into  
operation.  
Fig. 14—Use of 104994A calibration wrench.  
NOTE: Radiant heat from your hands will offset the ther-  
mometer reading. After making each adjustment, wait 5  
or 10 minutes for the thermometer to stabilize before  
comparing.  
CALIBRATION  
WRENCH  
Fig. 13—Thermometer calibration.  
ANTICIPATOR  
SETTING  
LEVER  
.
35  
.
30  
ANTICIPATOR  
SCALEPLATE  
.
20  
.10  
INCREASE  
M8583  
Typical Wiring Diagrams  
The clock for the T8095 and TS8095 must be powered by  
a 24V transformer for the T8095. A separate transformer  
may be connected (Fig. 15), or the system transformer may  
be connected (Fig. 16).  
M5128  
THERMOSTAT  
This thermostat was calibrated at the factory and should  
not need recalibration in the field. If recalibration seems  
necessary, first be sure wallplate or subbase is accurately  
leveled. Then check thermometer calibration.  
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Fig. 15—Typical hookup for clock powered by  
separate 24-Vac transformer.  
Fig. 16—Typical hookup for clock powered by  
system transformer. Clock powered by battery  
when system is not powered (e.g., power to  
system is off or interrupted).  
CLOCK  
2
BATTERY  
THERMOSTAT  
CLOCK  
BATTERY  
THERMOSTAT  
SUBBASE  
C
C
R
W
L1  
HOT)  
(
1
SUBBASE  
C
C
R
W
L2  
HEAT  
RELAY  
L1  
HOT)  
(
1
L1  
HOT)  
HEAT  
RELAY  
L2  
(
1
L2  
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS  
AND OVERLOAD PROTECTION AS REQUIRED.  
M1513A  
BATTERY BACKUP MAY BE USED IF POWER TO  
CLOCK IS INTERRUPTED.  
M1512B  
Fig. 17—Internal schematic and typical hookup for TS8095A Thermostat/191108AC Wallplate in heating-  
only system.  
CLOCK  
FALL  
FALL  
THERMOSTAT  
BIMETAL FIXED  
ANTICIPATOR  
BIMETAL FIXED  
ANTICIPATOR  
WALLPLATE  
C
C
R
W
7
50 mV  
L1  
HOT)  
SYSTEM  
(
1
L2  
M1808A  
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.  
Automation and Control Solutions  
Honeywell International Inc.  
Honeywell Limited—Honeywell Limitée  
35 Dynamic Drive  
1
985 Douglas Drive North  
Golden Valley, MN 55422  
Scarborough, Ontario M1V 4Z9  

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