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Mounting; Insert Timer Batteries; Set Timer; Attach Thermostat Cover - Honeywell T8195B Installation Instructions Manual

Heating or cooling and heating/cooling new construction thermostat, wallplate and subbase
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Fig. 5—Methods of connecting terminals.
FOR STRAIGHT
CONNECTION—
STRIP 5/16 in. [8 mm]
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 in. [11 mm]
TABLE 2—TERMINAL DESIGNATIONS.
Subbase
Terminal
R
Control transformer power.
W
Heating control circuit.
Y
Cooling control circuit; jumper to W
for heat pump compressor control if
no P terminal on subbase.
G
Fan control circuit.
C
Clock control (transformer common).
O
Cooling damper or changeover/
reversing valve, makes continuously
in cool.
B
Heating damper or changeover/
reversing valve, makes continuously
in heat.
The timer is powered by the system low-voltage trans-
former. 24 Vac must be maintained across terminals R and C.
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.

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.
Insert the two captive mounting screws located in the
bottom corners of the base (Fig. 6).
Firmly tighten the screws.
INSERT TIMER BATTERIES (OPTIONAL)
Power is supplied to the clock by the 24-Vac transformer.
Two AAA alkaline backup batteries (not included) may be
installed to supply power to the timer if power is interrupted
due to power failure.
Install the batteries in the thermostat (Fig. 7).
Once a year or when batteries are dead, replace with two
new AAA alkaline batteries. We recommend Energizer
batteries.
69-0564—3
BARRIER
M1556B
Control
Function
Fig. 6—Thermostat mounting.
1
THERMOSTAT
BASE
Fig. 7—Insert timer backup batteries.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP

SET TIMER

Adjust the clock by moving the knob clockwise
not reverse the knob.
When time is correctly set, the time indicator arrow
(triangle shape) points to the corresponding daytime (light)
or nighttime (dark) portion of the program dial.

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. 9).
Swing the cover downward until it catches at the bot-
tom of the base.
®
4
TAB (2)
MOUNTING SLOT (2)
CAPTIVE
WALLPLATE
MOUNTING SCREWS
OR SUBBASE
M8603
M8585
. Do

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