T8095A/191108AJ/Q682B
Heating, Cooling and Heating/Cooling
Thermostat,Wallplate, and Subbase;
TS8095A/191108AC Heating-Only
Thermostat andWallplate
Installation Instructions for the Trained Service Technician.
Preparation
Check thermostat and subbase (if used) suitability for the heating, cooling, or heating/cooling system. Refer to Table 1.
Assembletoolsrequired:flatbladedscrewdriver,handor 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.
NOTE: Order Q682B Subbase separately.
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 instructions 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- 468-1502.
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TABLE 1—SYSTEM COMPATIBILITY. |
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Type of Heating System |
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to be Controlled |
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Conditions/Compatibility |
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Electric (Line Voltage)— |
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The R8239D1015 Isolating Relay or R841 Silent Switching Center must be |
typical baseboard and radiant |
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installed in the thermostat control circuit.a |
Fan Coil Unit |
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Compatible. Assure correct subbase identity is selected for fan control. |
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Gas—Direct Spark Ignition |
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Compatible. If not using battery backup, assure that 24V control transformer |
(DSI), Intermittent Pilot (IP), |
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common is accessible for connection to thermostat cable conductor and power to |
and Standing Pilot (SP) |
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the transformer is not regularly interrupted by high temperature or limit operation. |
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Heat Pump |
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Compatible. Assure correct subbase identity is selected for fan control and |
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changeover control (O terminal for cool and B terminal for heat). |
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Hot Water Zone |
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Honeywell 2-wire valves are compatible. |
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Some non-Honeywell 2-wire valves require an R8239D1015 Isolating Relay in |
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the thermostat control circuit.a |
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Some 3-wire valves require an R8239A1052 Isolating Relay in the thermostat |
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control circuit.a, b |
Oil |
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If not using battery backup, assure that the 24V control transformer common is |
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accessible for connection to thermostat cable conductor and power to transformer |
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is not regularly interrupted by high temperature, purge cycle, or limit operation. |
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Vent Damper |
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Honeywell damper motors are compatible. |
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Some non-Honeywell damper motors require an R8239D1015 Isolating Relay in |
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the thermostat control circuit.a Check control amperage requirement. |
Warm Air Zone |
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Most are compatible. |
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aIf thermostat is not compatible with the system being controlled, the system will not operate. No hazard exists. The thermostat 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. b Consult manufacturer for installation requirements.
D.F. • Rev. 11-94 •1
• ©Honeywell Inc. 1994 • Form Number69--0638—1
Installation
WHEN INSTALLING THIS PRODUCT…
1.Read these instructions carefully. Failure to follow them could cause a hazardous condition.
2.Installermustbeatrainedexperiencedservicetechnician.
3.After installation is complete, check out product operation as provided in these instructions.
IMPORTANT: An incorrectly leveled subbase will cause the temperature control to deviate from setpoint. It is not a calibration problem.
CAUTION
1.Disconnect power supply to prevent electrical shock or equipment damage.
2.To prevent interference with the thermostat linkage,keepwirelengthtoaminimumandrun wires as close as possible to the subbase.
3.Do not overtighten thermostat captive mounting screws because damage to subbase threads can result.
4.Do not short across coil terminals on relay. This can burn out the thermostat heat anticipator.
LOCATION
Locate thermostat about 5 ft [1.5m] above the floor in an area with good air circulation at average temperature.
Donotmountthethermostatwhereitmaybeaffectedby:
—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.
Run wires from the heating, cooling or heating/cooling equipment to the new thermostat location.
Refer to the Typical Wiring Diagrams section to determine the number of wires required for your application.
UNPACK THERMOSTAT
Handle your new thermostat carefully; rough handling may interfere with its accuracy. Before unpacking, refer to Fig. 1.
Remove and discard the shipping wrap.
IMPORTANT: Save package of screws and instructions for the homeowner.
Remove the thermostat cover by lifting from the bottom. Set aside cover until needed later.
Carefully remove the material protecting the mercury switch bulb.
Loosen two captive mounting screws and separate wallplate (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.
Fig. 1—Unpack thermostat.
THERMOSTAT
COVER
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70 |
80 |
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60 |
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50 |
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12 |
3 |
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9 |
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LIFT
COVER
CAPTIVE
MOUNTING
SCREWS
THERMOSTAT
BASE |
M1518 |
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.
Fig. 2—Mounting wallplate or subbase to wall.
3 SCREW HOLES WITH PLASTIC ANCHORS
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O |
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B |
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R |
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W |
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G |
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Y |
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FAN |
AUTO |
HEAT |
COOL |
ON |
OFF |
HEATING/COOLING SUBBASE
M1552A
3 SCREW HOLES WITH PLASTIC ANCHORS
WALLPLATE
M1815
69-0638—1 |
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Fig. 3—Leveling methods for wallplate or subbase.
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SPIRIT LEVEL |
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PLUMB |
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LINE |
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O |
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B |
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R |
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W |
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G |
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Y |
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PLUMB |
FAN |
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BOB OR |
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COOL |
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ON |
AUTO |
HEAT |
OFF |
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WEIGHT |
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M1555
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). Follow 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.
Carefully level the wallplate or subbase (Fig. 3), and firmly tighten the screws.
WIRE WALLPLATE OR SUBBASE
Follow the instructions provided by the heating, cooling, or heating/cooling equipment manufacturer. If not available, refer to the Typical Wiring Diagrams section at the end of this publication.
Disconnect the power supply before making wiring connections to prevent electrical shock or equipment damage.
NOTE: All wiring must comply with local electrical codes and ordinances.
This thermostat clock can be powered by a 24-Vac transformer with battery backup. Refer to Figs. 15 and 16 for hookup diagrams of typical powering applications.
Wallplate (Heating or Cooling Systems)
Refer to Fig. 5 and strip the thermostat wire insulation as necessary.
For heating-only systems, connect wires to R, W, and C (if applicable) terminals. See Fig. 17. For cooling-only systems, connect wires R, Y, and C (if applicable) terminals. Firmly tighten the 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.
Fig. 4—Mounting wallplate or subbase on horizontal outlet box.
EXISTING |
EXISTING |
HORIZONTAL |
HORIZONTAL |
OUTLET BOX |
OUTLET BOX |
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O |
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R |
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B |
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R |
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W |
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W |
HEATING/ |
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G |
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COOLING |
WALLPLATE |
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SUBBASE |
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Y |
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FAN |
AUTO |
HEAT |
COOL |
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ON |
OFF |
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M1816 |
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M1553A |
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VERTICAL
OUTLET
BOX 1
2
COVER ADAPTER PLATE RING
2
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SUBBASE OR |
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WALLPLATE |
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1 |
NOT INCLUDED WITH UNIT. |
MOUNTING |
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SCREWS (2) |
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2 |
ACCESSORY PARTS AVAILABLE. |
M1554A |
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3 |
69-0638—1 |
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