Honeywell Y460A2003 Benutzerhandbuch

® U.S. Registered Trademark
Copyright © 1999 Honeywell Inc. •                •All Rights Reserved 

69- 1358

®

The Y460A2003 Thermostat is for 15 to 30 Vac control 
of gas- or oil-fueled warm air, steam or hot water 
heating/electric cooling systems.

❑

Follow these instructions step-by-step for proper 
installation of your Honeywell thermostat. It is 
recommended that as you read, understand and 
complete each step, you check  

√

  it off with a pencil 

or pen.

❑

Assemble the following required tools:
Flat-bladed screwdriver; hand or power drill with 
3/16 in. (4.8 mm) drill bit; wire cutter/stripper or sharp 
knife; bubble level or plumb bob and line.

For cooling systems, do not operate cooling if 
outdoor temperature is below 50

°

F (10

°

C).

❑

Test your heating and/or cooling systems to be sure 
they are working, especially if they have been 
inoperative for any length of time. If either system 
does not work, contact your local heating/air 
conditioning dealer for assistance.

Turn off power to the system at the main fuse 
or circuit breaker panel. Most buildings have a 
separate switch box or circuit breaker for dis-
connecting power to the furnace. 

❑

Carefully unpack your new thermostat.

❑

Remove and discard the shipping wrap; be sure to 
save the screws and the instructions.

❑

Remove the thermostat cover and set it aside to use 
later. 

❑

Remove the red plastic insert that holds the mercury 
switch in place.

❑

Remove the cover of the old thermostat. If the cover 
does not snap off when pulled firmly from the 
bottom, look for screw(s) to loosen to unlock the 
cover.

❑

Before removing 
the old thermostat 
from the wall, look 
at it carefully to 
locate the heat 
anticipator 
adjustment 
mechanism. Look 
at the illustration to 
help you recognize 
the heat 
anticipator. Make a 
note here ______________ of that anticipator 
setting for use in Step 7. The heat anticipator pointer, 
if adjustable, will be set at one of a series of numbers 
representing the electrical current rating of the 
primary control in your furnace: .2, .4, .8, etc or 0.2, 
0.4, 0.8, etc. If no heat anticipator/indication is 
showing, go on to the next step.

❑

Loosen screw(s) holding the thermostat base to the 
subbase or wall and lift it away.

FLAT BLADE
SCREWDRIVER

HAND OR POWER
DRILL WITH 1/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL

WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES

MASKING TAPE, IF NEEDED
TO LABEL WIRES AS THEY
ARE DISCONNECTED FROM
OLD THERMOSTAT

SPIRIT LEVEL OR PLUMB BOB AND LINE TO LEVEL 
THERMOSTAT FOR ACCURATE OPERATION

M 835

M6115

BULB
SWITCH

ANTICIPATOR
SCALE

ANTICIPATOR
SETTING LEVER