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Heating or Cooling and Heating/Cooling
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.
Type of Heating System
to be Controlled
Electric (Line Voltage)—typical
baseboard and radiant
Fan Coil Unit
Gas—Direct Spark Ignition
(DSI), Intermittent Pilot (IP), and
Standing Pilot (SP)
Heat Pump
Hot Water Zone
Oil
Vent Damper
Warm Air Zone
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.
b
Consult manufacturer for installation requirements.
T8195B/Q682B,C, Y8224A
New Construction Thermostat,
Installation Instructions for the Trained Service Technician.
Preparation
TABLE 1—THERMOSTAT AND SYSTEM COMPATIBILITY.
• The R8239D1015 Isolating Relay or R841 Silent Switching Center must be
installed in the thermostat control circuit.
• Compatible. Assure correct subbase identity is selected for fan control.
• Compatible. Assure that 24V control transformer common is accessible for
connection to thermostat cable conductor and power to the transformer is not
regularly interrupted by high temperature or limit operation.
• Compatible. Assure correct subbase identity is selected for fan control and
changeover control (O terminal for cool and B terminal for heat). Jumper Y
to W for heat pump compressor control.
• Honeywell 2-wire valves are compatible.
• Some non-Honeywell 2-wire valves require an R8239D1015 Isolating Relay
in the thermostat control circuit.
• Some 3-wire valves require an R8239A1052 Isolating Relay in the
thermostat control circuit.
• Assure that the 24V control transformer common is accessible for connection
to thermostat cable conductor and power to the transformer is not regularly
interrupted by high temperature, purge cycle, or limit operation.
• Honeywell damper motors are compatible.
• Some non-Honeywell damper motors require an R8239D1015 Isolating
Relay in the thermostat control circuit.
requirement.
• Most are compatible.
D.F. • Rev. 11-94 •
Wallplate and Subbase
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-
468-1502.
Conditions/Compatibility
a
a, b
1
• ©Honeywell Inc. 1994 • Form Number 69-0564—3
M3375
Recycling Notice
M3375
a
a
Check control amperage
69-0564—3
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Table of Contents
Related Manuals for Honeywell T8195B
Summary of Contents for Honeywell T8195B
- Page 1 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.
-
Page 2: Installation
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. Do not mount the thermostat where it may be affected by: —... -
Page 3: Wire Wallplate Or Subbase
Follow the instructions provided by the heating, cooling Disconnect the power supply before making wiring con- and ordinances. Refer to Fig. 5 and strip the thermostat wire insulation as For heating-only systems, connect wires to R, W, and C Push excess wire back into the wall. -
Page 4: Mounting
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 wallplate or subbase. Hang the thermostat base on the wallplate or subbase. - Page 5 Fig. 8—Set timer. SET TEMPERATURE CONTROL LEVERS The two levers on the top of the thermostat control the low and high temperatures for energy savings and comfort control (Fig. 10). The lever on the left (blue mark) controls the lower temperature. The lever on the right (red mark) controls the higher temperature.
- Page 6 If not available, use Figs. 11 through 13 as a guide. REMEMBER: Your wiring must follow local electrical codes and ordinances. Fig. 11—Typical hookup for T8195B Thermo- stat and Q682C Wallplate in gas heating control system. TIMER...
- Page 7 Fig. 12—Typical hookup for T8195B Thermostat and Q682B Subbase in conventional heating/ cooling system. TIMER THERMOSTAT SUBBASE HEATING DAMPER (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. REMOTE INDICATION FOR FILTER OPTIONAL. TIMER THERMOSTAT SUBBASE (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
- Page 8 Automation and Control Solutions Honeywell International Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9...
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Questions and answers
Are Honeywell T8195B 1009 thermostats still available for retail customers or maybe only in HVAC supplier locations like Biard & Crockett or Ferguson in Orange, CA? I'm a homeowner & the home we bought new in 1993 has 2 T8195B thermostats. The one upstairs that controls the gas furnace & A/C has started short-cycling the exhaust fan ½ way thru every night after running the A/C fine until then (trying to start it for 5 seconds, then stopping for 5 seconds, and just doing this repeatedly). Nothing will stop the short-cycling except flipping off the breaker outside in the panel. And I mean NOTHING. No thermostat switch or temp settings, not even OFF instead of Heat or A/C. If they're no longer sold, what's a newer compatibly sized & priced unit? I don't anything fancy. Digital is OK but I'd hope that it covers the same or bigger area to avoid painting. The base against the wall on these T8195B thermostats are 4-1/8” x 6-3/4”, so it would be nice if another was at least both of those dimensions at a minimum. BTW in case you might want to fix this site, this Support submission page won’t let normal iPhone photos to be Uploaded with these Questions, not even after sending it to my PC and reducing the image to 25% of the original for it to be Submitted. This page just puts an X on it that can be clicked on to close it and not attach it to the Submission, signifying that it didn’t like it.
@Jeff Davis Help anyone?
Are Honeywell t8195b 1009 thermostats still available for retail customers or maybe only in HVAC supplier locations like Biard & Crockett or Ferguson in Orange, CA? I'm a homeowner & the home we bought new in 1993 has 2 t8195b thermostats. The one upstairs that controls the gas furnace & A/C has started short-cycling tthe exhaust fan ½ way thru every night after running the A/C fine until then. Nothing will stop the short-cycling except flipping off the breaker outside in the panel. And I mean NOTHING. No thermostat switch or temp settings, not even OFF instead of Heat or A/C. If they're no longer sold, what's a newer compatibly sized & priced unit? I don't anything fancy. Digital is OK but I'd hope that it covers the same or bigger area to avoid painting.
@Jeff Davis Isn't anyone following this thread or motivated enough to help little ol' Jeff? I could really use some basic help.