69-1358
The Round® Creative Series
M6115
BULB
SWITCH
ANTICIPATOR
SCALE
ANTICIPATOR
Y460A2003 Thermostat
INSTALLATION MANUAL
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.
Your Y460A Thermostat
Follow these instructions step-by-step for proper
❑
installation of your Honeywell t hermostat. It is
recommended that as you read, understa nd and
complete each step, you check √ it off with a pencil
or pen.
1 PREPARE FOR INSTALLATION
Assemble the following required tools:
❑
Flat-bladed screwdrive r; hand or power drill with
3/16 in. (4.8 mm) dril l bit; wi re cutte r/stripper or shar p
knife; bubble level or plumb bob and line.
FLAT BLADE
SCREWDRIVER
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
SPIRIT LEVEL OR PLUMB BOB AND LINE TO LEVEL
THERMOSTAT FOR ACCURATE OPERATION
IMPORTANT:
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.
HAND OR POWER
DRILL WITH 1/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
MASKING TAPE, IF NEEDED
TO LABEL WIRES AS THEY
ARE DISCONNECTED FROM
OLD THERMOSTAT
M 835
IMPORTANT:
Turn off power to the system at the main fuse
or circuit breaker panel. Most buildings have a
separate switch box or circuit br eaker for disconnecting power to the furnace.
2 UNPACK YOUR THERMOSTAT
Carefully unpack your new thermostat.
❑
Remove and discard the shipping wrap; be sure to
❑
save the screws and the instructions.
Remove the thermostat co ver and set it aside to use
❑
later.
Remove the red plastic insert that holds t he mercury
❑
switch in place.
3 REMOVE YOUR OLD THERMOSTAT
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 removi n g
❑
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 St ep 7. Th e heat ant icipator po inter,
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 thermost at base to the
❑
subbase or wall and lift it away.
® U.S. Registered Trade m ark
Copyright © 1999 Honeywell Inc. • •All Rights Reserved
THE ROUND® CREATIVE SERIES Y460A2003 THERMOSTAT
Disconnect wires from
❑
the old thermostat
subbase. Wrap the
wires around a pencil or
other object, as shown,
to prevent them from
falling back into the wall
opening.
NOTE: As you disconnect each wire, use masking
tape to tape the end and label with the letter of
the terminal designation to allow easier reconnection to the new subbase.
Keep the old thermostat for reference until your new
❑
thermostat is functioning correctly.
RECYCLING NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of it properly.
Contact your local waste management authority for
instructions regardi ng recy cl ing and th e prop er disp osal
of the old thermostat. If you have questions, call the
Honeywell Customer Response Center at 1-800-468-
1502.
or
WIRES THROUGH
WALL OPENING
M5136
❑
MOLDED
POST (2)
4 MOUNT THE SUBBASE
IMPORTANT:
Install your thermostat about 5 ft (1.5m) a bove
the floor in an area with good air circul ation at
average temperature. Do not instal l i t wher e it
may be affected by:
— drafts, or dead spots behind doors and in
corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) are as s uch as a n outsi de
wall behind the thermostat.
Bring the thermostat cable through the subbase
❑
entrance hole.
Fasten the subbase to the wall or outl et box with the
❑
mounting screws as shown in the illustrat ion.
OPENING FOR
THERMOSTAT
WIRING (PLUG)
(WITH INSULATION)
5 WIRE THE SUBBASE
❑
NOTE: All wiring must comply with local electrical
OUTLET BOX
1
Q539
SUBBASE
Y460
THERMOSTAT
CABLE
CAPTIVE
MOUNTING
USE Q539 SUBBASE FOR HEAT AND/OR COOL
1
APPLICATIONS WITH SWITCHING.
Tighten the screws aft er using a spirit level or plumb
line to accurately level the subbase. It must be level
to maintain accurate calibration.
PLUMB LINE
MARKERS
Follow the instructions provided by the heating or
heating/cooling equipment manufacturer. If not
available, refer to the thermostat wiring diagram.
SCREWS (3)
ENTRANCE
HOLE
MOUNTING
HOLE (3)
M13417
SPIRIT
LEVEL
MOUNTING
SLOT (3)
M13415
codes and ordinances.
1
Q539
SUBBASE
Y460
CAPTIVE
MOUNTING
USE Q539 SUBBASE FOR HEAT AND/OR COOL
1
APPLICATIONS WITH SWITCHING.
69-1358 2
SCREWS (3)
WALL
THERMOSTAT
CABLE
ENTRANCE
HOLE
M13416
Wire the Subbase
Refer to the illustration to str ip the thermostat wire
❑
insulation from the wire where it connects to the
terminal, as necessary.
Refer to the labels you placed on the wires when you
❑
removed the old thermostat. Match the letter of your
old thermostat wire with the corresponding terminal
letter on your new thermostat.
Connect the wires to the matching terminals on the
❑
subbase. If your old thermostat had an R terminal,
and your new one has RC and RH terminals,
connect the old wire R to terminal RH, and add a
small piece of wire to use as a jumper t o c onnect RC
to RH. The drawing shows how to jumper RC to RH.
THE ROUND® CREATIVE SERIES Y460A2003 THERMOSTAT
G
R
H
R
C
W
Firmly tighten the screws.
❑
Push the excess wire back into the wall.
❑
Plug the hole with nonflammable insulation to
❑
prevent drafts from affecti ng the thermostat
operation.
Y460A for heating/cooling system using separate RCRH terminals. If old thermostat has single R terminal,
refer to jumper drawing in Subbase Wiring procedure.
HEAT
F
F
O
COOL
R
H
R
C
2
FAN
RELAY
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
IN HEATING, THE FAN IS CONTROLLED BY ANOTHER CONTROLLER,
2
SUCH AS A HONEYWELL L4064 FAN AND LIMIT CONTROLLER OR
FAN TIMER.
SHOWS
VOLTAGE
RATING
SHOWS
ANTICIPATOR
SETTING
8406
V8043E 1004 4
24V 50/60CY
.32 AMP
ZONE VALVE
If the current rating is still unavailable:
❑
— Remove the W wire from the subbase.
G
Y
W
HEATING
RELAY OR
VALVE COIL
@ 60CY
Y
EXAMPLE: FOR RC TO RH
JUMPER, STRIP WIRE
END LONG ENOUGH TO
JOIN BOTH TERMINALS.
M1277A
FAN
ON
AUTO
COOLING
CONTACTOR
COIL
1
SHOWS
VOLTAGE
RATING
FROM MAIN
FUEL SUPPLY
M13418
TYPICAL GAS VALVE
6 MOUNT YOUR THERMOSTAT
Set the heat anticipator indicator to 1.2 before
❑
mounting to prevent the anticipator from burning out
during installation.
1.0
.8
.6
.5
.4
.3
SCALE
HOLE SUITABLE FOR
PENCIL POINT
TO MOVE INDICATOR
Align the thermostat over the subbase and tighten
❑
the three captive mounting screws (see Step 4).
These captive mounting screws complete th e
electrical connections to the ther mostat.
.2
.12
.15
LONGER
7 SET HEAT ANTICIPATOR INDICATOR
Be sure the thermostat adjustable heat anticipator is
❑
set correctly to accuratel y control the temperature.
An incorrect setting (if too high) can result in wide
room temperature swings or (if too low) burn out the
anticipator, which voids the thermostat warranty.
Make sure you have the current draw (anticipator
❑
setting) for your system. This is the number you
wrote in the box in Step 3. If you were unable to find
the current draw for Step 3, this information can be
found printed on the p rimary co ntrol at t he fur nac e or
boiler. The primary control is usually a gas valve, a
relay or burner control box, Aquastat® Controller or
zone valve with the thermostat wires connected to it.
These controls are usually located behind the
furnace cover; see the illustration.
OIL BURNER CONTROL
SHOWS
CURRENT
DRAW
TO
24 Vac 50/60 Hz
0.4 AMP
— Connect one probe of an ac ammeter (0 to 2.0A,
for example) to the W wire and connect the other
probe to the W terminal.
BURNER
SHOWS
ANTICIPATOR
SETTING
HEAT
ANTICIPATOR
INDICATOR
M1368
SHOWS
VOLTAGE
30 VAC
RATING
0
.2
A
M
P
T
T
F
F
M6116B
3 69-1358
THE ROUND® CREATIVE SERIES Y460A2003 THERMOSTAT
— Let the system operate through the ammet e r for
at least one minute before taking a reading.
Record the reading here ______________ .
— Reconnect the W wire to the W terminal.
Move the heat anticipator indicator to match the
❑
number you recorded in Step 3 or in Step 7.
NOTE: Hot water and steam systems require you to
multiply the current rating times 1.3. For electric heat systems, add the fan relay current,
usually 0.2A to 0.4A.
Snap the cover ring over the thermostat dial.
❑
8 SET THE TEMPERATURE
Turn the transparent dial until the desired point on
❑
the setting scale is aligned with the point er , as shown
in the illustration.
IMPORTANT:
During a call for heat or cool, an electrical
spark can be seen through the colored
decorator cover ring. Do not be alarmed;
this is normal operation for a mercury
switch.
Set Subbase Switch
CAUTION
Equipment Damage Hazard.
Can cause permanent damage to the
compressor.
Do not rotate the thermostat dial back and forth
just to observe the electrical spark; observe the
compressor five-minute minimal-off period.
To operate the heating system, set the subbase
❑
System switch to Heat. To operate the cooling
system, set the subbase System switch to Cool. Set
it to Off if you want neither heating or coo li ng.
Set the Fan switch to On for continuous fan
❑
operation or to Auto for fan opera ti on during heating
or cooling cycles.
TEMPERATURE
SETTING
7
0
0
6
8
0
0
5
5
0
0
8
6
0
0
7
THERMOMETER
M13419
9 CHECK OUT THE SYSTEM
Heating
Turn down the temperature setting to the lowest
❑
point. Move the System switch to Heat. Raise the
temperature setting above room temperature; the
heating equipment should start. Lower the
temperature setting below room temperature; the
heating system should stop.
Cooling
CAUTION
Equipment Damage Hazard.
Can cause permanent damage to the
compressor or other equipment.
To avoid possible compressor damage, allow
the compressor to re main off for fi ve minutes
before restarting.
To avoid possible equipment damage, do not
operate cooling when the outs ide temperat ure is
below 50°F (10°C).
See equipment manufacturer instructi ons.
CAUTION
Equipment Damage Hazard.
Can cause permanent damage to the
compressor.
Do not rotate the thermostat dial back and forth
just to observe the electrical spark; observe the
compressor five-minute minimal-off period.
Turn up the temperature set ti ng to the highest point.
❑
Move the subbase System switch to Cool. Lower the
temperature setting below the r oom temperat ure; the
cooling equipment should start. Raise the temperature setting above the room t emperatur e; th e cooli ng
system should stop.
WARRANTY
Honeywell warrants this product, excluding battery, to be free
from defects in the workmanship or ma terials, under normal
use and service, f or a period of one (1) year from the date of
purchase by the c onsumer. If, at any time during the warranty
period, the product is defective or malfunctions, Honeywe l l
shall repair or replace it (at Honeywel l ’s option) within a reasonable period of time.
If the product is defective,
i. return it, with a bill of sale or other dated proof of pur-
chase, to the retail er from which you purchased it, or
ii. package it carefully, along with proof of purchase
(including date of purchase) and a short description of
the malfunction, and mail it, postage prepaid, to the following address:
Honeywell Inc .
Return Goods Depa rtment
1050 Berkshire Lane
Plymouth, MN 55441-4437
This warranty do es not cover removal o r rei nstallation cost s.
This warranty shal l not apply if it is shown by Honeywell that
the defect or malfunction was caused by damage which
occurred while the product was in the possession of a
consumer.
69-1358 4
THE ROUND® CREATIVE SERIES Y460A2003 THERMOSTAT
Honeywell’s sole responsibility shall be to repair or replace the
product within the terms stated above. HONEYWELL SHALL
NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY
KIND, INCLUDING ANY INCIDENTAL OR CON SE Q UENT IAL
DAMAGES RESUL TIN G, DIRECTLY OR INDIRECTLY, FROM
ANY BREACH OF ANY WARRANTY, EXPRESS OR
IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.
Some states do not al l ow the exclusion or lim itation of incidental or consequential damages, so this li m i ta tion may not apply
to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY
HONEYWELL MAKES ON THIS PRODUCT. THE DURATION
OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE
ONE YEAR DURATION OF THIS WARRANTY. Some states
do not allow limit ations on how long an implied warranty lasts ,
so the above lim i tation may not app l y t o yo u.
This warranty gives you specific legal rights, and you may have
other rights which vary from state to state.
If you have any questions concerning this warranty , pl e ase
write our Customer Assistance Center, Honeywell Inc., P.O.
Box 524, Minneap ol i s, MN 55440-0524 or c al l 1-800-4681502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In
Canada, write Retail Product s ON15-02H, Hone ywell Limited/
Honeywell Limi t ée, 155 Gordon Baker Road, North York,
Ontario M2H 3N7.
5 69-1358
Home and Building Control Home and Building Control
Honeywell Inc. Honeywell Limited-Honeywell Limitée
Honeywell Plaza 155 Gordon Baker Road
P.O. Box 524 North York, Ontario
Minneapolis, MN 55408-0524 M2H 3N7
69-1358 G.H. 12-99 Printed in Mexico www.honeywell.com
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