Honeywell T8195B Support Question
Honeywell T8195B Support Question
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Question posted by kjtriantafilo on January 2nd, 2012
Replacement For Honeywell Thermostat T8195b 1009
I am looking for replacement for honeywell thermostat t8195b 1009. The voltage to the thermostat is 28.3 VAC, and most new thermosats are rated at 24 VAC. Can these new thermostats perform with 28.3 VAC? Can you recommend a replacement?
Current Answers
Answer #1: Posted by BusterDoogen on January 2nd, 2012 3:35 PM
BusterDoogen
Member since:
October 30th, 2011 Points: 28,565,447
Member since:
October 30th, 2011 Points: 28,565,447
Are you reading the voltage with a meter. The unit you are trying to replace is 24 vac transformer to the timer. Any 24 vac thermostat should work.
Voltage trouble shooting chart:
Voltage at Timer Terminals
Ac Voltage at
C-R Terminals Possible Cause Check Action
0 Vac 1. System power is Off. 1. Restore power.
2. Short in timer power supply wiring. 2. Replace wiring.
3. Limit switch contacts stuck open. 3. Free or replace limit switch.
4. Transformer supplying power is
burned out.
4. Replace transformer.
Up to 15 Vac. 1. System transformer used to power
the timer is inadequate.
1. Use additional (separate)
transformer.
2. Additional (separate) transformer
used to power the timer has
inadequate voltage.
2. Install transformer with proper
secondary voltage.
15 to 30 Vac. 1. Spring fingers on thermostat not
making proper contact with
subbase terminals.
1. Rebend spring fingers to a
45 degree angle to ensure
proper contact.
2. Timer has failed. 2. Replace thermostat.
Hope this helps!
Related Honeywell T8195B Manual Pages
Owner's Manual - Page 1
Heating/Cooling Thermostat and Subbase or Heating or Cooling Thermostat
and Wallplate
T8195A,B/Q682
OWNER'S MANUAL
69-0563-2
Owner's Manual - Page 2
... lower and raise the temperature in your home one or more times every 24 hours. Read this control, or an old control containing mercury in a sealed tube.
This thermostat meets California Title 24 requirements-mandatory installation of energy savings with your new Honeywell thermostat. If this control is your
old control in the trash at 1-800...
Owner's Manual - Page 3
Table Of Contents
PAGE Features Of Your Thermostat ...4 Setting The Temperature ...7 Setting Subbase Switches ...8 Inserting Timer Backup Batteries ...9 Setting The Timer ...10 Programming ...11 Troubleshooting ...14 Servicing The Thermostat ...21 Warranty ...23
3
69-0563-2
Owner's Manual - Page 4
...) controls the low temperature, right (red mark) controls the high temperature.
5 TIMER. Arrow head indicates time for energy savings and comfort temperature periods.
2 THERMOSTAT COVER. Must be inserted into 24-hour timer dial slots to the time indicator.
7 TIME INDICATOR. or p.m. time to control program index wheel.
4
1
2
3
M8723
4
69-0563-2 This timer...
Owner's Manual - Page 5
5
6
9
11
12 M8744
10
8
7
M8745
10 PIN SLOTS. Provide automatic temperature control by switching the heating or cooling system on 24-hour dial at 10-minute intervals for heating or cooling thermostat without system or fan switching.
5
69-0563-2 Provides mounting base and wiring connections for program pin insertion.
11 MERCURY BULB AND...
Owner's Manual - Page 6
13 Q682 SUBBASE. Provides mounting base, wiring connections and manual switching control for heating/cooling thermostat.
13
R
G
FAN ON
AUTO
O B W
Y
HEAT
COOL OFF
M1551
6
69-0563-2
Owner's Manual - Page 8
...If the fan switch is at the AUTO position, the fan is controlled by the thermostat in the detent over desired function indicator mark for proper circuit operation.
8
69-0563-2... The subbase fan switch controls fan operation as controlled by the
thermostat. OFF- Setting Subbase Switches
(if applicable)
The subbase system switch controls system operation as ...
Owner's Manual - Page 9
... a year or when batteries are dead, replace with two new AAA alkaline batteries. Inserting Timer Batteries
(Optional)
Power is interrupted due to the timer by the 24 Vac transformer. INSTALL WITH POSITIVE ENDS UP
M8585
Fig. 2-Inserting timer backup batteries.
9
69-0563-2 Install the batteries in the thermostat as shown in Fig. 2.
Two AAA alkaline...
Owner's Manual - Page 10
Setting The Timer
Lift thermostat flip-up cover and you will point to the current time by carefully turning the knob clockwise Do ...arrow will point to light band on dial. When time is correctly set, the Time Indicator Arrow (See Fig. 3) will find the 24-hour program dial, slotted in 10-minute increments.
M821A
Fig. 3-Setting the timer. Do not reverse
the knob or damage to dark ...
Owner's Manual - Page 14
.... 1
- Check for correct terminal hookups. If blown or tripped, replace fuse or reset breaker.
- pilot flame.
furnace power switch. fuse or circuit breaker.
R and W thermostat connections. Repair any frayed or broken wires. Move system switch to ON... can generally be Move switch to HEAT position. Troubleshooting
Your Honeywell thermostat requires little or no attention.
Owner's Manual - Page 17
....
- other
Timer is On. Repair any frayed or broken wires. Make sure power is losing time. - Make sure power is blown or breaker tripped, replace or reset. Y and R thermostat connections.
- Reset clock.
(continued)
17
69-0563-2 condenser switch position.
Move to cooling system. May be interrupted. If fuse is Off. Firmly tighten...
Owner's Manual - Page 18
... clock and equipment may cut off power to system.
- Remove the thermostat from the wallplate or subbase, and measure the voltage. filter. May be Off on equipment may be clogged.
Wire separate ... time (continued). high limit control. voltage across the C and R terminals.
Timer does not run.
- Safety limit on safety. Replace filter and reset clock. Refer to power clock.
Owner's Manual - Page 19
... heat. If this Troubleshooting section has not solved the problem, call a qualified service technician or Honeywell Customer Assistance Center, Honeywell Inc., P.O., Box 524, Minneapolis, MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. reading disagree.
-
Action
Reinstall thermostat subbase. to 5:30 p.m., Central time.
19
69-0563-2
Troubleshooting (continued)
Problem
Check...
Owner's Manual - Page 20
Up to ensure proper contact.
2. Additional (separate) transformer used to 30 Vac.
1. Spring fingers on thermostat not making proper contact with proper secondary voltage.
1.
Free or replace limit switch. 4. Replace transformer.
1. Rebend spring fingers to a 45 degree angle to 15 Vac.
1. Transformer supplying power is Off. 2. System transformer used to power the timer has ...
Owner's Manual - Page 21
... if it until both thermometers read the same.
If the setpoint lever and the thermostat reading do not agree, follow the procedure below.
If the readings are the same, replace cover and put the system into operation.
Set the thermostat cover on it. If the readings are different, insert a small screwdriver in the...
Owner's Manual - Page 23
... workmanship or materials, under normal use and service, for a period of one (1) year from state to you . Limited One-Year Warranty
Honeywell warrants this product to be to repair or replace the product within a reasonable period of time.
Some states do not allow limitations on how long an implied warranty lasts, so...
Installation Instructions - Page 1
... 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
Fan Coil Unit
• Compatible. T8195B/Q682B,C, Y8224A Heating or Cooling and Heating/Cooling
New Construction Thermostat, Wallplate and Subbase
Installation...
Installation Instructions - Page 4
... edge of the cover into the
mounting slots in the thermostat base (Fig. 9). C
Clock control (transformer common).
B
Heating damper or changeover/
reversing valve, makes continuously
in . [11 mm]
BARRIER
M1556B
TABLE 2-TERMINAL DESIGNATIONS. The timer is powered by the system low-voltage transformer. 24 Vac must be installed to supply power to the timer...
Installation Instructions - Page 6
...the Owner's Manual. Leave Owner's Manual and Assistance Information in a convenient place for T8195B Thermostat and Q682C Wallplate in the Owner's Manual.
Operate the entire cooling system at least ...switch at HEAT. Place the system switch lever to HEAT and fan switch
lever to manufacturer recommendations. Push both levers 5° F [3° C] below the room temperature.
Reset both ...
Installation Instructions - Page 7
M573B
7
69-0564-3
TIMER THERMOSTAT
HEAT/COOL ANTICIPATOR
H
C
FALL
H
C
FALL
SUBBASE
SYSTEM SWITCH
FAN SWITCH
2
FILTER... 2 REMOTE INDICATION FOR FILTER OPTIONAL. Fig. 12-Typical hookup for T8195B Thermostat and Q682B Subbase in conventional heating/ cooling system. SWITCH M8606
TIMER
THERMOSTAT
HEAT ANTICIPATORS
SUBBASE
SYSTEM SWITCH
H
C
FALL
H
C FALL
COOL ...
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