HONEYWELL Controls And HVAC Accessories Manual L0712581

User Manual: HONEYWELL HONEYWELL Controls and HVAC Accessories Manual HONEYWELL Controls and HVAC Accessories Owner's Manual, HONEYWELL Controls and HVAC Accessories installation guides

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Honeywell
THE T8600, T8601, T8602, T8603 CHRONOTHERM III PROGRAMMABLE
FUEL SAVER THERMOSTATS
PROVIDE
AUTOMATIC CONTROL OF SINGLE STAGE HEATING OR
HEATING/COOLING
SYSTEMS AND OFFER USERS THE
HIGHEST STANDARD OF COMFORT AND CONVENIENCE
AVAILABLE WITH ENERGY SAVINGS.
[] T8600 thermostats are powered through the heating/ccoling
system controls; ideal for replacement application.
[] T8601 thermostats are powered direct from transformer,
requiring two wires to system transformer; ideal for new construction installation,
[] T8602 thermostats are powered by three AA alkaline batteries; suitable for 100 percent control compatibility.
[] T8603 thermostats are powered direct from transformer,
and include additional terminals for one, two or three transformer systems.
[]

Thermostats

include a wiring wallplate.

1-1 Digital clock (liquid crystal display) indicates continuous
time, day, current period, and room temperature. Upon inquiry,
provides program times and program set points.
[1 All thermostats provide 4 different temperature settings per
daily schedule to optimize user comfort and energy savings.
[] Different daily schedules
Saturday and Sunday.

may be selected for weekdays,

IJ ENRG. SAV. and SYSTEM light-emitting
included on T8600, T8601, T8603 models.

diodes

(LEDs)

C3 Models available with automatic heatJcool changeover.
[] Batteries packed with devices provide power to maintain
clock and memory during power failures in T8600, T8601,
T8603 and supply power for operation in T8602.
[] Thermostat can be programmedin hand or after mounted on
wall (batteries must be installed).
E3 Temporary program override available by using---WARMER and COOLER keys.
--SKIP next program key.
--CHANGE to last program key.
[] HOLD TEMP key provided
(vacation_oliday).

for indefinite program override

[] Adaptive Intelligent Recovery TM function brings room temperature to programmed temperature at programmed time,
maximizing comfort and energy savings.

E3 AdaptiveIntelligent Recovery_tconventional recoveryse~
lection screw includedon backof thermostat.
E3 Fan operation switch included on back of SUPER TRADELINE models to select either independent or direct thermostat
control of fan in heating.

S.M.
Rev. 4-90

Form Number 68-0056--1
©Honeywell Inc. 1990

IMPORTANT
THE SPECIFICATIONS
GIVEN IN THIS PUBLICATION DO NOT INCLUDE NORMAL MANUFACTURING TOLERANCES. THEREFORE, THIS UNIT MAY NOT MATCH THE LISTED SPECIFICATIONS
EXACTLY. ALSO,
THIS PRODUCT IS TESTED UNDER CLOSELY CONTROLLED CONDITIONS, AND SOME MINOR DIFFERENCES IN PERFORMANCE CAN BE EXPECTED IF THOSE CONDITIONS ARE CHANGED.

SUPER

TRADELINE

MODELS

SUPER TRADELINE controls offer features on available on TRADELINE models, and are designed to replace a wide
range of Honeywell and competitive controls.
TRADELINE models are selected and packaged to provide ease of stocking, ease of handling, and maximum
replacement value. Specifications of SUPER TRADELINE and TRADELINE controls are the same except as noted below.

TABLE I---SUPER TRADELINE MODELS.
THERMOSTAT
MODEL
NUMBER
T8600C a,b

STAGES
HEAT COOL
1
1

SWITCHING
SYSTEM
FAN
HEAT-OFFCOOL

ON-AUTO

T8602C c

HEAT-OFFCOOL

ON-AUTO

T8603C

HEAT-OFFCOOL

ON-AUTO

APPLICATION

POWER METHOD

Gas, oil or electric
24 V systems
with option of independent or
thermostatcontrol(ed fan in
heat.

Powered through the heating or
cooling system controls; backup
batteries included.
Powered by three AA alkaline
batteries,
Powered
includes
one, two
systems;
included.

direct from transformer:
additional terminals for
or three transformer
backup batteries

aTypical single-stage heat pump (with external fan control) applications; jumper W and Y.
blncludes 250 ohm, 10 W resistor for low current draw (below 0.08 A) system compatibility.
CTypicatolder and commercial electric heat, and water coil applications.
SUPER TRADELINE FEATURE:
Fan operation switch on back of thermostat to select either independent or direct thermostat control of fan in heating.

WHEN PURCHASING
REPLACEMENT
AND MODERNIZATION
PRODUCTS FROM YOUR TRADELINE
WHOLESALER OR YOUR DISTRIBUTOR, REFER TO THE TRADELNE CATALOG OR PRICE SHEETS FOR
COMPLETE ORDERING NUMBER, OR SPECIFY-1.
2.
3.
4.

Model number; SUPER TRADELINE, If desired.
Number of heat and cool stages desired.
System, fan switching desired.
Application.

IF YOU HAVE ADDITIONAL QUESTIONS, NEED FURTHER INFORMATION,
ON OUR PRODUCTS OR SERVICES, PLEASE WRITE OR PHONE:
1. YOUR LOCAL HONEYWELL
DIRECTORY).

RESIDENTIAL

OR WOULD LIKE TO COMMENT

SALES OFFICE (CHECK WHITE PAGES OF YOUR PHONE

2. RESIDENTIAL DIVISION CUSTOMER SERVICE
HONEYWELL INC,, 1885 DOUGLAS DRIVE NORTH
MINNEAPOLIS, MINNESOTA 55422-4386 (612) 542-7500
IN CANADA--HONEYWELL
LIMITED/HONEYWELL
LIMITEE, 740 ELLESMERE
OUGH, ONTARIO MIP 2V9. INTERNATIONAL SALES AND SERVICE OFFICES
CITIES OF THE WORLD.

ROAD, SCARBORIN ALL PRINCIPAL

TRADELINE

MODELS

TRADELINE models
replacement value.

are selected

and packaged

to provide ease of stocking, ease of handling

TABLE II--TRADELINE
THERMOSTAT
MODEL
NUMBER

STAGES
HEAT C_0OL

and maximum

MODELS.

SWITCHING
FAN

SYSTEM

APPLICATION

T8600A

T8600B a

T8600B b

T8600C c

HEAT-OFF-COOL

ON-AUTO

T8600C c'd

HEAT-OFF-COOL

ON-AUTO

24 V systems with
thermostat-controlled fan
on heat and cool.

T8600D e

HEAT-OFFCOOL-AUTO

ON-AUTO

Gas, oil or electric 24V
systems with independently controlled fan in heat.

T8601A

HEAT-OFF
ON-AUTO

T8601B

ON-AUTO

T8601C c

HEAT-OFF-COOL

ON-AUTO

T8601D e

HEAT-OFFCOOL-AUTO

ON-AUTO

T8602A

T8602B b

ON-AUTO

T8602C

HEAT-OFF-COOL

ON-AUTO

T8603A

T8603B

ON-AUTO

Gas, oil or electric 24 V
systems with independently controlled fan in
heat.

POWER METHOD
Powered through
heating or cooling
system controls;
backup batteries
included.

Gas, oil or electric
24 V systems with
independently
controlled
fan in heat; ideal for new
construction installation.

Powered direct from
transformer, requires
two wires to system
transformer; backup
batteries included.

Gas, oil or electric 24 V
systems with independently controlled fan in
heat.

Powered from a
separate transformer,
requiring extra wire(s)
to thermostat; backup
batteries included.

aWith positive OFF.
bHeat only with fan control.
CTypical single-stage heat pump (with external fan
control) applications; jumper W and Y.

dTypical older and commercial electric heat, and water
coil applications.
eln freezing climates, be sure the cooling compressor
has adequate cold start protection.

LIGHT-EMITTING
DIODES (LEDs): Two included on
T8600, T8601, T8603 models. SYSTEM LED lights up
during thermostat ON cycle, and ENRG. SAV. LED
lights up during the LEAVE and SLEEP time periods.
VOLTAGE RATING: 15 to 30 Vac.
CURRENT RATING:
For T8600:0.08 A minimum to 1.2 A maximum. Current
draw must be 0.08 A to 1.2 A in the W or Y circuit
when the fan switch is in the ON position, or 0.08 A
to 1.2 A total in the Y plus G circuits when the fan
switch is in the AUTO position.
For T8601, T8602, T8603:1.6 A maximum.
OPERATING HUMIDITY RANGE: 5 to 90 percent relative
humidity.
OPERATIVE AMBIENT TEMPERATURE RANGE: 40 ° F
to 110° F [4" C to 43 ° C].
SET POINT RANGE: 45 ° F to 88 ° F [7° C to 31 ° C].
CALIBRATION:
Self-calibrating
thermostat
and thermometer to + 1° F.
SHIPPING TEMPERATURE: minus 20 ° Fto plus 120° F
[minus 29 ° C to plus 49 ° C].
CYCLES PER HOUR ADJUSTMENT:
Heating--factory-set
at 6 cph (adjustable to 1, 3, or 9
cph for special systems).
Cooling--factory-set
at 3 cph (not field adjustable).
FINISH: Beige matte over decorative brushed metal
faceplate.

DIMENSIONS: Thermostat (mounted on wallplate)--7 in.
[178 mm] long, 4-1/16 in. [103 mm] high, 1-3/4 in. [44
mm] deep. See Fig. 1 for wallplate dimensions.

IZ._S7

FIG. 1--T8600,
T8601, T8602, T8603 WALLPLATE
MOUNTING
DIMENSIONS
IN in. [mm IN
BRACKETS].

68-0056--1

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ACCESSORIES:
193121A Cover Plate Assembly includes cover plate,
adapter ring and screws. Covers marks left by old
thermostat. Allows mounting on vertical or horizontal
outlet box. 6-9/10 in. x 4-3/4 in. [175 mm x 121 mm].

TG586A Locking Cover.
202384B Resistor for T8600.
REPLACEMENT PART:
220529A Replacement Door Assembly.

:.Jj

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COMPATIBILITY
The T8600 Thermostats will replace most heating or
heating/cooling system thermostats, and are designed to
be part of a Honeywell control system. They can be used
with other control systems, but an isolating relay may be
needed in the thermostat control circuit. See Table II1.
IMPORTANT
If your system needs an isolating relay and one is not
installed, no hazard will exist, but the system will not
operate. The thermostat will not be damaged unless
you connect it directly to 120 Vac.
If the current draw of the primary control is below O.08A,
a 202394B Resistor should be installed on the furnace
terminal strip to increase the current draw of the primary
control to 0.08A or greater. This would alleviate any
compatibility problem between the T8600 Thermostat and
the system due to a low current draw. For installation
details, refer to instructions packed with the resistor.
The T8601, T8602 and T8603 Thermostats are compatible with other control systems without the need for an
isolating relay.
WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Checkthe ratings given on the product to make sure
the product is suitable for your application.
3. Installer must be a trained, experienced service
technician.
4. Allow thermostat to warm to room temperature before programming.
5. After installation is complete, check out product
operation as provided in these instructions.

i!!i

tiple transformer system may require turning off multiple
switches or disconnects. Remove any existing wallplate or
subbase from wall. Label each wire with, or write down, the
letter or number on the wiring terminal as the wire is
removed, to avoid miswiring later.
If New Installation
Run cable to a hole at the selected wall location, and pull
about 3 in. [76 mini of wire through the opening. Colorcoded 18 gauge thermostat cable with at least one conductor for each wiring terminal is recommended. Good service
practice recommends selection of cable with one or two
more conductors than the immediate application requires.
MOUNTING WALLPLATE
Remove thermostat from wallplate (Fig. 2).

1_,179

FIG. 2NREMOVING
PLATE.

THERMOSTAT

FROM

WALL-

WALL

Disconnect power supply to prevent electrical shock
or equipment damage.
LOCATION
Install thermostat and wallplate about 5 ft. [1.5 m] above
the floor in an area with good air circulation at room
temperature.
Do not install the thermostat where it may be affected
by- drafts or dead spots behind doors, in corners or
under cabinets.
-- hot or cold air from ducts.
-- radiant heat from sun or appliances.
-- concealed pipes and chimneys.
-- unheated (uncooled) areas behind the thermostat,
such as an outside wall.

ANCHORS

/,_J_

If Replacing An Existing Thermostat
Turn thermostat power off at furnace or boiler. A mul-

•

;

i,, _'
!

' _:i,

(2)

USE TWO

MOUNTING

HOLES

FIG. 3--MOUNTING

:;i
_'

THAT

BEST

WALLPLATE

] i: i/i iiiiiiiii
'

, 'l

FIT APPLICATION,

::
i;

ON WALL.

)
,'

12,134

: ":!:?
21

TABLE III--T8600 THERMOSTAT AND SYSTEM COMPATIBILITY
(not applicable to T8601, T8602, T8603)
Manufacturer

ELECTRIC

Model No.

Compatible

Solution1

HEAT RELAYS

Honeywell R841C
Klixon 51172

lyosl

Honeywell (all)

Honeywell R8404A

yes

Robertshaw SJ4001-2001

yes l
lyes I

IR823°o1°1

White-Rodgers 669-430
Constant Ignition

! :°

Fenwa105-21

I R8239D1015

Intermittent Pilot Module (non 100% shutoff)

Honeywell R8184G
Robertshaw SJ4007-204

Honeywell $86A

yes

White-Rodgers

I yes
yneO

668-430

Honeywell $86C

yes

VENT DAMPERS

Honeywell $86D

ye s

Honeywell D80B,D

Robertshaw SP 710-929

yes

Rebertshaw SP 730-929

yes

Robertshaw
AVD-E-780-90

Robertshaw SP 712 series

yes

Johnson (Penn Base)
M15AC-1

White-Rodgers
36C84/50A22

yes

Flair SPG 5-21

Camstat SIG-24

yes

ZONE CONTROL
Hot Water Valves

Spect rol 990-195

yes

R8239D1015

yes I
no
! yes

I R8239D1015
I
i

Johnson (Penn Base)
G6ORHL

R8239D1015

Johnson (Penn Base)
CSA42A/Y79

rio

R8239D1015

Johnson (Penn Base)
CSA42A

yes

Powerplle (self-powered,
All Models

lYesI

Honeywell R8185E

yes

Honeywell $87B
Fenwa105-162426

Solution

OIL SYSTEMS
Interrupted Ignition

GAS SYSTEMS
Direct Spark Ignition Module

Honeywell $825D

CornDatble

Model No.

Standing Pilot
yes
yes

Honeywell $825C

Manufacturer

yes

Honeywell V8043F
Taco 571-2
Flair VJ 100

no
ii s

R8239A1052
R8239A1052
R8239D1015

Electro Zone RB-4
HEAT/COOL INTERLOCK
Lennox GCSI Series
millivolt)
I no

] R8239D1015

]

R8239with
RC-R
thermostat

The wallplate does not require leveling for operation,
but for appearance only.
The wallplate mounts directly onto the wall with the
screws and anchors included in the package. Use the
wallplate as a template, and with a pencil, mark two of the
three mounting holes inthe wallplate (Fig. 3). Ifdrywall construction, plastic anchors must be used; use 3/16 in. bit to
drill holes for anchors. Gently tap anchors into holes until
they are flush to the wall surface. Thread wires through the
center opening of the wallplate. Then, mount the wallplate
using two screws provided. Gently tighten screws, level
top surface of wallplate, then securely tighten screws.

Disconnect power before wiring to prevent electrical
shock or equipment damage.
The shape of the terminal barrier permits insertion of
straight or conventional wraparound wiring connections.
Either method is acceptable (Fig. 5).
Push excess wire back into the hole, and plug hole with
nonhardening caulk, putty, or insulation to prevent drafts
from affecting thermostat operation.
Refer to Figs. 6-49 for typical hookups of wallplate and
thermostat. For T8600 single transformer system using
wallplate with RC, R terminals, jumper RC and R as shown
in Fig. 4.

WIRING
All wiring must comply with local electrical codes and
ordinances.

NOTE: Keep all wiring restricted to ribbed area surrounding terminals (Fig. 5) to assure thermostat/wallplate
contact.

68-0056--1

il rl i !iiiiiii
illiii i!i
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_1 _

, r

,.,

i/
_

FOR
ooooe®ooo

oo0ooo

STRAIGHT

INSERTION

FOR

STRIP

5/16

in, [8 mint

WRAPAROUND--

STRIP

7/16

in. II 1 mmJ

WIRING
1"O
THIS AREA

-I0

RESTRICT

FRONT VIEW OF
TERMINAL AREA

CROSS-SECTIONAL
VIEW OF
TERMINAL AREA

Iz.132_-

_2,t6_

FIG. 5mKEEP
WIRING RESTRICTED
TO RIBBED
AREA SURROUNDING TERMINALS.

FIG. 4--JUMPER
RC AND R FOR SINGLE TRANSFORMER. STRIP WIRE 3/4 in [19 mm].
List of Wiring Diagrams

I Fig. No.

I Fig. No.
T8600A, B (heat only)
gas or central electric
oil
Intermittent Pilot
isolating relay

zone valves, incompatible or 3-wire
valves,
Honeywell or
I zone
electric,
decentralized
compatible 2-wire

14
13
15

thermostat-controlled fan
electric cool
only
I electric
heat/electric
cool,
single-stage electric heat pump

I
I

19
20

I isolating
oil heat/electric
cool
switching
center

T8600C (heat!cool)
gas heat/electric cool,
oil heat/electric cool
electric
cool
isolating heat/electric
relay

10
11
12

7
8
6
9

16
17
18

T8600C, D (heat/cool)
gas heat/electric cool, single transformer
gas heat/electric cool, two transformer

22
21

T8601A,B (heat only)
gas or central electric
oil
Intermittent Pilot

26
27
I

23
24
25

II zone
3-wire
zone valves,
valves, incompatible
Honeywell or or
compatible
2-wire

28
29

electric heat/electric cool
I
ingle-stage electric heat pump

I oil heat/electric cool

35
8
4
36

zone valves, Honeywell or
compatible 2-wire
I one valves, incompatible or 3-wire

1"8601C (heat/cool)
gas heat/electric cool,
electric heat/electric cool
oil heat/electric cool

30
31

T8601D (heat/cool)
gas heat/electric cool

T8602A,B (heat only)
gas or central electric
oil
Intermittent Pilot
electric, decentralized

T86020 (heat/cool)
gas heat/electric cool, two transformer
with fan operation switch

12
37

List of Diagrams (continued)

I Fig. No.

T8602C (heat/cool)
gas heat/electric cool, two transformer
gas heatlelectric cool,
electric heat/electric cool

39
40

oil heat/electric cool

43
42
44

zone valves, Honeywell or
onecompatible
valves, incompatible
or 3-wire
2-wire

T8603A,B (heat only)
gas
oil
Intermittent Pilot
T8603C (heat/cool)
gas heat/electric cool,
electric heat/electric cool
oil heat/electric cool

electric heat/electric cool,
gas heat/electric cool,
thermostat-controlled fan

7
48

HEATING-ONLY WALLPLATE
HEATING-ONLY

WALLPLATE

GAS VALVE
OR HEAT

A
L2 .---,qJJ
A

POWER

24V

SUPPLY.

OVERLOAD

PROVIDE

DISCONNECT

PROTECTION

MEANS

AND

A AND

t.2

OIL PRIMARY

REQUIRED.
/_

CURRENT

DRAW

MUST

BETWEEN

0,08

POWER SUPPLY.
PROTECTION
AS

PROVIDE
REQUIRED+

CURRENT

MUST

DISCONNECT

MEANS

AND

OVERLOAD

A.
DRAW

BE BETWEEN

0.08

A AND

1.2 A.
t2,14S

MODELS

WITH

ON-AUTO

FAN

SWITCH.

M1381

FIG. 6--T8600A,B HEATING-ONLY CIRCUIT IN CONTINUOUS PILOT GAS OR CENTRAL ELECTRIC SYSTEM.

CONNECTION

SE6

FIG. 7--T8600A, B HEATING-ONLY
SYSTEM.

VR8440

MAIN
VALVE
COMMON

$86

0
PILOT

CIRCUIT IN AN OIL

MODULE

_/_

V R8440 VALVE
"_*. TERMINALS

25 Vac

VALVE

WALLPLATE

L-

G"--N6_

LIMIT
CONTROLLER

A
L_

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.
MAXIMUM
t0.8

PILOT

BURNER

MEANS

IGNITER-SENSOR

AND

CABLE

OVERLOAD

LENGTH:

30 In.

m].

L/_

FACTORY-INSTALLED

CONTROLS

WIRES.

IN TRANSFORMER

DO NOT
CIRCUIT

TO VR8440
PILOT OUTLET

REMOVE,
MUST

NOT

BE IN GROUNDED

LEG,
MODELS

12,_398
WITH

OH-AUTO

FAN

SWITCH.

FIG. 8--T8600A, B; T8602A,B HEATING-ONLY CIRCUIT IN A HONEYWELL INTERMI'FrENT PILOT GAS BURNING
IGNITION SYSTEM.

68-0056--1

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HEATING-ONLY

WALLPLATE

BLA

R8239D1015

®
®
SYSTEM
TRANSFORMER
RED
_

V
HEATER
PRIMARY
EONTROL

POWER SUPPLY•
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.

PRIMARY

CONTROL

SUCH

AS GAS

VALVE

MEANS

AND

ELECTRIC

RESISTANCE

OVERLOAD

HEAT

ONLY

ZONE 2
HEATING

WALLPLATE

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.

MEANS

AND

OVERLOAD
12,138A

PRIMARY.
t2,146A

FIG. 9--T8600A,B
HEATING-ONLY
CIRCUIT USING
AN R8239D ISOLATING RELAY. SEE TABLE
III FOR USAGE.

ZONE I
HEATING

ONLY

=IG. 10--T8600A,B
HEATING-ONLY
ELECTRIC
BASEBOARD
CABLE SYSTEM.

WALLPLATE

ZONE 3
HEATING

ONLY

WALLPLATE

ZONE 4
HEATING

CIRCUIT IN AN
OR CEILING

ONLY

WALLPLATE

RB239A1052

®®

I
I
I
I

zonE2 Iz°NE
VALVE

DAMPER
MOTOR

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED¸
USE ONE

R8239

USE FOR

3_WIRE

FOR

EVERY

ZONE

VALVE

FOUR
OR

MEANS

AND

VALVE

) (

_,.PER
MOTOR

OVERLOAD

ZONES¸
DAMPERS¸

FIG. 11--T8600A,B
CIRCUIT FOR CONTROLLING INCOMPATIBLE
OR 3-WIRE ZONE VALVES OR DAMPERS.
HEATING OR COOLING EQUIPMENT IS OPERATED BY AN END SWITCH ON THE ZONE VALVE OR
MOTOR, OR BY A THERMOSTAT IN A MASTER ZONE.

:,,_:/,i_:__,_i_ ' ', _ qi,_

j!_,

,:::, _ ,.,,i_ _,_ : _.....

_/,

ZONE

ZONE 2

ZONE

HEATING-ONLY

NEATING.ONLY

HEATING-ONLY

WALLPLATE

'
1

VALVE

DAMPER
POWER

MOTOR

SUPPLY.

PROTECTION
L_

ZONE 4

ZONE

ZONE 2

ZONE 3

VALVE OR

DAMPER

PROVIDE

DISCONNECT

MEANS

MOTOR

AND OVERLOAD

AS REQUIRED.

USE ONE 38 VA TRANSFORMER
(HONEYWELL

MOTOR

ZONE 4

FOR EVEnY

FOUR ZONES

AT72D OR EQUIVALENT).

M1376

FIG. 12mT8600A,B;
T8602A,B CIRCUIT FOR CONTROLLING HONEYWELL OR COMPATIBLE 2-WIRE ZONF
VALVES OR DAMPERS, HEATING OR COOLING EQUIPMENT IS OPERATED BY AN END SWITCH ON
THE ZONE VALVE OR MOTOR, OR BY A THERMOSTAT IN A MASTER ZONE.

HEATING-COOLING

HEATING

COOLING

WALLPLATE

DAMPEN/

FAI

CO L!G

COOLING

CHANGEOVER

HEATING
DAMPE_
HEATING
CHANGEOVER

LI
_

POWER SUPPLY
PROVIDE
DISCONNECT
PROTECTION
AS REG_LJIRED

/_,

CURRENT
W OR

DRAW

(Y PLUS

FOR

G) MUST

W OH

Y MUST

BE 1.2

A OR

MEANS

AND

OVERLOAD

IBE 0_(18 A OR GREATER;
LESS¸

tz,l_

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.

MEANS

CURRENT
DRAW FOR W OR Y MUST BE 0.08
W OR (Y PLUS G) MUST BE 1.2 A OR LESS.

FIG. 13--T8600C
HEATING/COOLING
CIRCUIT IN A
SINGLE TRANSFORMER
SYSTEM WITH
GAS HEAT/ELECTRIC COOLING OR ELECTRIC HEAT/ELECTRIC
COOLING
AND
CHANGEOVER
TERMINALS
(O,B).
THERMOSTAT
CONTROLS FAN IN COOLING ONLY (TYPICAL
MULTISPEED
FAN
APPLICATIONS).

A OR

AND

OVERLOAD

GREATER;
12,148 B

FIG. 14_T8600C
HEATING/COOLING
CIRCUIT IN AN
OIL HEATING/ELECTRIC COOLING SYSTEM
WITH CHANGEOVER
TERMINALS
(O,B).
HEATING TRANSFORMER
IS IN OIL PRIMARY. ALSO SEE RG. 21 (RC, R TERMINALS).

68-0056--1

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' ¸¸¸¸ '¸:

HEATING-COOLING

WALLPLATE

HEATING-COOLING

WALLPLATE

AIR
COND,
EQUIP.

_POWER

SUPPLY.

OVERLOAD
t.2

Zt2'kSYSTEM

PREVENT

POWER SUPPLY, PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
A//_

PRIMARY CONTROL, SUCH AS GAS VALVE OR ELECTRONIC
IGNITION MODULE.

CURRENT DRAW FOR W OR Y MUST BE 0.08 A OR
W

PLUS

MUST

1.2

A OR

Z_,ON

COOLING

DISCONNECT

AND

ON BATTERIES.

COOLING-ONLY

APPLICATION,

EQUIPMENT

MUST

YEAR-ROUND.

DRAW FOR Y MUST BE 0.08 A OR GREATER;

Y PLUS G MUST BE LESS THAN

1,2 A.

M2079B

12_149B

FIG. 17--T8600C
COOLING CIRCUIT IN SINGLE
TRANSFORMER SYSTEM WITH ELECTRIC
COOLING.

WALLPLATE

HEATING-COOLING

ADD JUMPER

WALLPLATE

DAMPER/
COOLING
COOLING
CHANGEOVER

MEANS

AS REQUIRED.

MUST BE IN COOL POSITION

DRAIN

CURRENT

FIG. 15--T8600C HEATING/COOLING CIRCUIT USING
AN ISOLATING RELAY WITH CHANGEOVER
TERMINALS (O,B). SEE TABLE III FOR USAGE.

HEATING

SWITCH

BE POWERED

GREATER;

LESS.

PROVIDE

PROTECTION

AY_

DAMPER/
HEATING
CHANGEOVER

"--1

HEAT,NG
"
,&

_24V
- (L10 T)'41_
L2
/_

PROVIDE
POWER SUPPLY,
PROTECTION
AS REQUIRED,

DISCONNECT

MEANS

AND

OVERLOAD

,,_POWER

CURRENT
DRAW
FOR W OR Y MUST BE 0.08A OR GREATER;
{W PLUS G) OR (Y Pt US G) MUST BE 1.2 A OR LESS
)2,I37B

:IG.

SUPPLY.

OVERLOAD

16--T8600C
SUPER TRADELINE
HEATING/
COOLING CIRCUIT IN A SINGLE TRANSFORMER SYSTEM WITH ELECTRIC HEAT/
ELECTRIC COOLING AND CHANGEOVER
TERMINALS
(O,B). THERMOSTAT
CONTROLS FAN IN HEAT AND COOL (TYPICAL
SINGLE-SPEED FAN APPLICATIONS). SEE
TABLE
IV TO SET FAN OPERATION
SWITCH.

PROVIDE

PROTECTION

DISCONNECT

MEANS AND

AS REQUIRED.

CONNECT VALVE TO 0 FOR CHANGEOVER
OR B FOR CHANGEOVER
ON HEATING.

CURRENT

ON COOLING,

DRAW FOR W PLUg G MUST BE BETWEEN

AND 1.2 A.

0.080 A

M1377

FIG. 18--T8600C HEATING/COOLING CIRCUIT FOR A
SINGLE-STAGE
ELECTRIC
HEAT PUMP
WITH CHANGEOVER TERMINALS (O,B).

;:i_I,',: :

iii

'_ _ =

i i '_t¸

i'i

i I I

HEATING-COOLING
WALLPLATE

HEATING-COOLING

WALLPLATE

&A
L1

FAN
AIR

RELAY

COND.
EQUIP.

p..

/1\ POWER SUPPLY.
PROVIDE DISCONNECT
OVERLOAD
PROTECTION
AS REQUIRED,
PRIMARY
IGNITION

CONTROL,
MODULE.

MEANS

_1_ POWER SUPPLY,
PROVIDE DISCONNECT
OVERLOAD PROTECTION
AS REQUIRED,

AND

CURRENT DRAW
AND 1,2 A,

._UCN AS GAS VALVE OR ELECTRONIC

CURRENT
DRAW FOR W OR Y PLUS G MUST 8E BETWEEN
AND 1.2 A.
Z/_ ON TB60OD, HEATING

SYSTEM

POWER

0,08 A

MEANS AND

FOR W OR Y PLUS G MUST BE BE]BNEEN

ON T860OD, HEATING

SYSTEM

POWER

0.08 A

MUST BE ON YEAR-ROUND.
M1380

MUST BE ON YEAR-ROUND.
M1382

FIG. 19--T8600C, D HEATING/COOLING CIRCUITIN A
SINGLE TRANSFORMER
SYSTEM WITH
GAS HEAWELECTRIC COOLING, RCAND R
TERMINALS.

HEATING-COOLING

FIG. 21mT8600C, D HEATINGICOOLING
CIRCUIT IN
AN OIL HEATING/ELECTRIC
COOLING
SYSTEM. HEATING TRANSFORMER
IS IN
OIL PRIMARY, RC AND R TERMINALS.

WALLPLATE

HEATING-COOLING

WALL.PLATE

_1_ POWER SUPPLY•
PROVIDE DISCONNECT
OVERLOAD
PROTECTION
AS REQUIRED
PRIMARY
IGNITION

CONTROL,
MODUL E.

MEANS

AND

SUCH AS GAS VALVE OR ELECTRONIC

POWER SUPPLY. PROVIIDE OISCONNECT
PROTECTION
AS RE_tJlREO.
Z_

,_\

CURRENT

DRAW

FOR W OR Y MUST BE 0.08 A OR GREATER;

W OR (Y PLUS G) MUST BE 1,2 A OR LESS.
._ON

T6600D,

HEATING

SYSTEM

POWER

PRIMARY
MODULE,

CONTROL

SUCH AS GAS VALVE

MEANS AND OVERLOAD

OR ELECTRONIC

IGNIT_OR

CURRENT DRAW FOR Y MUST BE O.O8 A OR G REATER_
Y PLUS G MUST BE LESS THAN t .2 A.
L_

MUST BE ON YEAR-ROUND,

HEATING

SYSTEM POWER MUST BE ON YEAI_ROUND

FOR T8600D

M1378

FIG. 20_T8600C, D HEATING/COOLING CIRCUIT IN A
TWO-TRANSFORMER (ONE FOR HEATING,
ONE FOR COOLING) SYSTEM WITH GAS
HEAT/ELECTRIC COOLING, RC AND R
TERMINALS.

FIG. 22--T8600C, D HEATING/COOLING CIRCUIT USING AN R8239D ISOLATING SWITCHING
CENTER.

68-0056--1

,
i

G¸

:•

HEATING-ONLY

WALLPLATE

1÷ ÷91

R8239DIO15

POWER
SUPPLY•
PROVIDE
PROTECTION
AS REQUIRED.

DISCONNECT

AND

MEANS

24 Mac TRANSFORMER
SLJPPLIEB THERMOSTAT
ADDITIONAL
WIRE {C) CANNOT
BE BROUGHT
LOCATION,
USE T8600A
OR B.
=//_\

FOR

MODELS

WITH

AUTO

FAN

OVERLOAD

POWER,
IF ONE
TO THERMOSTAT

SWITCH.

12,155B
POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.
_._

CONNECTION

$86

VR844C

MAIN

VALVE

COMMON

MV/PV

AND

OVERLOAD

24 VAC TRANSFORMER
FOR THERMOSTAT
POWER. IF ONE
ADDITIONAL
WIRE (C) CANNOT
BE BROUGHT
TO THERMOSTAT
LOCATION,
USE T6600A OR B_
FOR

FIG. 23--T8601A,B
HEATING-ONLY CIRCUIT IN CONTINUOUS PILOT GAS OR CENTRAL ELECTRIC SYSTEM.

MEANS

MODELS

WITH

FAN SWITCH

ONLY.

FIG. 24--T8601A,B
HEATING-ONLY
OIL SYSTEM.

_2,1_2B

CIRCUIT IN AN

]

PILOT

VALVE

TH-TR
$88 MODULE

__VE
\

25 Vat
MV/PV

PV
GNO

-d

CONTROLLER

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.
/_

MAXIMUM
PILOT
30 in. IO.B m I .
FACTORY-INS
CONTROLS
LEG.

Li_

FOR

MObELS

BURNER

rALLED

IGNITER-SENSOR

WIRES,

IN TRANSFORMER

WITH

MEANS

ON-AUTO

FIG. 25_T8601A,B
HEATING-ONLY
SYSTEM.

NOT

CIRCUIT

FAN

AND

CABLE

OVERLOAD
TO VR84/_0
PILOT OUTLET

LENGTH:

REMOVE.
MUST

_OT

BE IN GROUNDED

SWITCH.

t2,154C

CIRCUIT IN A HONEYWELL

INTERMITTENT

PILOT GAS BURNING IGNITION

•

iiii!iii!;ill
iii!il
i il :
•

_i_/iii ii_!:i=i!
_¸:I,
i_ii_iiii•_i_i!ii_:iil)i;;

ZONE 1
HEATING-ONLY

ZONE 2
HEATING_ONLY

WALLPLATE

ZONE €
HEATING-ONLY

WALLPLATE

i
R8239A1052_

®®(

POWER

SUPPLY.

PROVIDE

PROTECTION

USE

ONE

RB239

FIG. 26--TB601A,B
HEATING
MOTOR,
VALVES,

DISCONNECT

MEANS

AND

OVERLOAD

USE FOR

3-WIRE

ZONE

VALVE

DAMPERS.

RECURRED.

FOR

EVERY

FOUR

ZONES,

CIRCUIT FOR CONTROLLING INCOMPATIBLE OR 3-WIRE ZONE VALVES OR DAMPERS.
OR COOLING EQUIPMENT IS OPERATED BY AN END SWITCH ON THE ZONE VALVE OR
OR BY A THERMOSTAT IN A MASTER ZONE. FOR HONEYWELL OR COMPATIBLE 2-WIRE
SEE FIG. 27.

7ONE

ZONE

HEATING-ONLY

HEAT]NG

WALLPLATE

ZONE
ONLY

ZONE4

HEATING-ONLY

WALLPLATE

WALLPLATE
i

®@@

®@@®1

L
ZONE

VALVE

ZONE

DAMPER

1_,

VALVE
MOTOR

POWER
SUPPLY.
PROTECTION
AS

PROVIDE
REQUIRED.

DAMPER

ZONE
OR

VALVE
MOTOR

DISCONNECT

USE ONE 38 VA TRANSFORMER
(}tONEYWELL

ZONE 4

3
OR

DAMPER

MEAN_;

FOR EVERY

AND

VALVE
MOTOR

OFI

DAMPER

MOTOR

OVERLOAD

FOUR ZONES

AT72D OR EQUIVALENT).

M1362

FIG. 27--T8601A,B
CIRCUIT FOR CONTROLLING HONEYWELL OR COMPATIBLE TWO-WIRE ZONE VALVES OR
DAMPERS. HEATING OR COOLING EQUIPMENT IS OPERATED BY AN END SWITCH ON THE ZONE
VALVE OR MOTOR, OR BY A THERMOSTAT IN A MASTER ZONE.

68-0056--1

.
'l

_i_

'.'_!,

_ ,

HEATiNG-COOLING

WALLPLATE

/_\

......

POWER

SUPPLV.

PROTECTION
pR)MARy

SUCH

MODULE

B TERMINALS

DISCONNECT

MEANS

AN D OVERLOAD

REQUIRED,

(_ONTROL

IGNITION
O,

PROVIDE
AS

OR
ON

HEATING

SOME

GAS

VALVE,

ELECTRONIC

CONTACTOR

MODELS.

12,15_B

FIG. 28--T8601C HEATING/COOLING
CIRCUIT IN A SINGLE TRANSFORMER SYSTEM WITH GAS HEAT/ELECTRIC COOLING, OR ELECTRIC HEAT/ELECTRIC
COOLING AND CHANGEOVER TERMINALS (O,B).
THERMOSTAT CONTROLS FAN IN COOLING ONLY (TYPICAL MULTISPEED FAN APPLICATIONS).
HEAT{NG-COO

LING

WALLPLATE

COOLING
CAMPER/
COOLING
CHANGEOVER

AIR
COND,
EQUIP.

_-H_L_Q
_

OIL

PRIMARY

POWER SUPPLY.
PROTECXION
AS

PROVIDE
REQUIRED,

DISCONNECT

MODELS.

D TERMINALS

SOME

MEAINS

AND

OVERLOAb

_2,156A

FIG. 29--T8601C HEATING/COOLING
CIRCUIT IN AN OIL HEATING/ELECTRIC
HAS ITS OWN TRANSFORMER.
HEATING-COOLING

WALLPLATE

COOLING SYSTEM. OIL PRIMARY

HEATING.COOLING

WALLPL_,TE

/
A
DAMPER/
COOLING
CHANGEOVER

COOLING
CONTACT{:

_!RESSOR
RELAyRE_S_ OR

FAI

HEAT{NO
DAMPER/
HEATING
CHANGEOVER

I
24 V
/|\
z/'l_

POWER SUPPLY.
PROVIDE
PROTECTION
AS REQUIREC,
CONNECT

VALVE

CHANGEOVER

TO O FOR
HEATING.

blSCONNECT

MEANS

AND

OVERLOAD

POWER SUPPLY.
PROTECTION
AS

PROVIDE
REQUIRED.

CISCONNECT

MEANS

AND

OVERLOAD
1_,1S9A

CHANGEOVER

ON COOLING,

B FOR
t _,1SB_,

FIG. 31--T8601 C HEATING/COOLIPIG CIRCUIT FOR A
CENTRAL ELECTRIC FURNACE/ELECTRIC
COOLING. (TYPICAL SINGLE-SPEED
FAN
APPLICATIONS).

FIG. 30--T8601C HEATING/COOLING CIRCUIT FOR A
SINGLE-STAGE
ELECTRIC HEAT PUMP.
FAN CONTROLLED BY THERMOSTAT.

:_!i!_i:
_ _ _!_ _ '_ .'/_;/,ii'_.:_i
_I_>/_:_ii_
_
_ii_

_i/.i:_:>!_.
,,_L_
_'__:_

HEATINGJONLY

WALLPLATE
ii

HEATING-COOLING

WALLPLATE

(

I
COOLING

Rill
A

ALl

SUPPLY.

PROVIDE

OVERLOAD

PROTECTION

MODELS

WITH ON-AUTO

DISCONNECT
AS

MEANS

AND

REQUIRED.

I1,v
,ll,..---

POWER

Lz--.-LL

FAN SWITCH.

M1379

POWER SUPPLY,
PROVIDE
PROTECTION
AS RE{_UIRED.

DISCONNECT

PRIMARY
IGNITION

A5 GAS

CONTROL
MODULE.

SUCH

MEANS

VALVE

AND

FIG. 34--T8602A,B
TINUOUS

OVERLOAD

HEATING-ONLY CIRCUIT IN CONPILOT GAS SYSTEM.

ELECTRONIC
I Z,160A

HEATING-ONLY

WALLPLATE

FIG. 32--T8601D
HEATING/COOLING
CIRCUIT IN A
SINGLE TRANSFORMER
SYSTEM WITH
GAS HEAT/ELECTRIC COOLING.
LI

OIL

PRIMARY

POWER SUPPLY,
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED.

MEANS

AND

OVERLOAD
12,173A

HEATING-COOLING

FIG. 35--T8602A,B

WALLPLATE

HEATING-ONLY

CIRCUIT IN AN

OIL SYSTEM.

HEATING-ONLY

ELA
LI

_AN
RELAY

AIF
COl

A÷,NOT,.
_-_-- @_L._3
OIL

WALLPLAT
iiiiiii

EO,

ql{,_L 1

PRIMARY

/L_

BLACK

(HOT)

I
//_

POWER

SUPPLY.

PROTEDTION

PROVIDE

AS REQUIRED,

DISCONNECT

MEANS

AND

OVERLOAD

RED

iZ,151A
BIME'
SWtT(

RESISTANCE
HEATER

SWITCH
HEATER
II

POWER

SUPPLY=

PROTECTION

FIG. 33--T8601D HEATING/COOLING
CIRCUIT IN AN
OIL HEATING/ELECTRIC
COOLING SYSTEM. OIL PRIMARY HAS ITS OWN TRANSFORMER.

PROVIDE

DISCONNECT

IIIIIII

MEANS

AS REQUIRED¸

FIG. 36_T8602A,B
HEATING-ONLY
ELECTRIC
BASEBOARD
CABLE SYSTEM.

AND

OVERLOAD
IZ.1 _A

CIRCUIT IN AN
OR CEILING

68-0056--1

ZONE1
HEATING

ONLY

ZONE 2
HEATING

WALLPLATE

ONLY

ZONE 3
HEATING

WALLPLATE

ONLY

ZONE 4
HEATING

WALLPLATE

ONLY

WALLPLATE

I **1
®®

.,III_L 1
=
(HOT)

'll

II
ZONEI

,,
I

ZONE

DAMPER
MOTOR

MOTOR
_l_

POWER SUPPLY.
PROVIDE
DISCONNECT
PROTECTION
AS REQUIRED,

MEANS

AND

OVERLOAD

USE ONE

RBZ39

FOR

EVERY

FOUR

ZONES.

USEFOR3-WIREZONEVALVEOROAMPERS.
12,150A

FIG. 37--T8602A,B
CIRCUIT FOR CONTROLLING INCOMPATIBLE
OR 3-WIRE ZONE VALVES OR DAMPERS.
HEATING OR COOLING EQUIPMENT IS OPERATED BY AN END SWITCH ON THE ZONE VALVE OR
MOTOR, OR BY A THERMOSTAT IN A MASTER ZONE. FOR HONEYWELL OR COMPATIBLE 2-WIRE
VALVES, SEE FIG. 12.
HEATING

- COOLING

WALLPLATE

COOLING

HEATING

WALLPLATE

HEATING
PRIMARY
CONTROL

A
L2

L1
(HOT)

POWER

SUPPLY,

OVERLOAD
L_

FOR SYSTEMS
DIRECTLY

PROVIDE

PROTECTION
WHERE

IN HEA'IING,

ELEC POSITION.
JUMPER
R AND
FOR SINGLE

DISCONNECT

MEANS

AND

POWER SUPPLY. PROVIDE
TECTION
AS REQUIRED.

PRIMARY
MODULE,

_ONTROL.

CURRENT

DRAW

DISCONNECT

SUCH AS GAS

MEANS

VALVE

AND

OVERLOAD

ELECTRONIC

PRO-

IGNITION

AS REQUIRED,
THERMOS]AT

MUST CONTROL

SET FAN OPERATION

SWITCH

USE ONLY ONE TRANSFORMER
RC.

] RANSFORMER

SYSTEM

JUMPER

FOR

W OR Y PLUS

G MUST

BE LESS THAN

! ,6 A.
IZ,142B

FAN
TO

AND

R AND

RC,

M3_9A

FIG.

FIG. 39--T8602C
HEATING/COOLING
CIRCUIT IN A
TWO-TRANSFORMER
(ONE FOR HEATING,
ONE FOR COOLING) SYSTEM WITH GAS
HEAT/ELECTRIC
COOLING,
RC AND R
TERMINALS.

38--T8602C
SUPER TRADELINE
HEATING/
COOLING
CIRCUIT
IN A TWO-TRANSFORMER SYSTEM (GAS HEATING/ELECTRIC COOLING). SEE TABLE IV TO SET
FAN OPERATION SWITCH.

H EATING-COOLING

WALLPLATE

HEATING-ONLY

WALLPLATE

_"-.::_:_"-_'-'-_"_'_'-_" •.:_;,,,,,:_-.v.: -. :+.- _:::._,...,._.,-...;.....; :-....;:

:_;::::::_.::_::_::!:!:!Si:!:i::;;;;;;_;;::;;;: _;

TEMPORARILY CHANGING THE
PROGRAM
These features allow the program to
be custom-tailored for those times
when someone comes home early,
or stays up late, or plans to be out
for the evening.
To keep the current temperature
through the next program period:

To go back to the temperature
the previous program period:

To temporarily raise or lower the
temperature for the current period
only:

Press and release. The name of the
period to be skipped will flash in the
display until the next regularly
scheduled period starts.

IPaPOPA_¥

Press and release. The display will
show the name of the previous
period and flash "temporary" until
the next regularly scheduled period
starts.

I _.u_

7n_I

Press and hold until the desired
temperature is reached. The display
will flash "temporary" until the next
programmed time period starts.

[

-, _1

the
temporary
settings.
Press
and release
to cancel any of

{

_EU_

_e_T J

To change back:

PERMANENTLY
PROGRAM

CHANGING THE

If schedule changes or a different
temperature is desired, it is possible
to update any soiling without
affecting the rest of the program•

_,,_,_
_;___pM

]_o}

Press and release the desired
period key.

Press and hold until the desired
schedule day shows on the display.

Press and held the Time or
Temperature keys until the display
shows the desired new program.

Press and release to return to
normal operation.

OPERATING
MANUALLY

THE THERMOSTAT

This feature is particularly useful
when going on vacation or other
extended absence. It does not
cancel the program.

Press

and release.

Press and hold to change the
temperature setting. After a few
seconds the display will show the
current temperature.

"_n° I

Press and release to check the
temperature setting.

Press and release to cancel manual
control.
NOTE: Moving the system switch
also cancels hold.

CANCELING
SE'nINGS

PROGRAM

The thermostat requires time and
temperature settings in the WAKE
period, but any of the others can be
canceled. Weekday, Saturday and
Sunday settings are canceled
separately.

Press and hold the desired period
key until the time and temperature
clear from the display (about 3
seconds).

[

Press and release to return to
normal operation.

M_ _u_WE_r_u_
L_

HF_

°]

8,-°,
°]

CHECKING THE PROGRAM
TIMES AND TEMPERATURES
It is possible to check all the stored
settings without affecting the
permanent program.

Press and release the desired
period key. The start time and
temperature setting will appear on
the display.

"-'
..........22;'
I I_1",.._

Press and release to display the
next daily time and temperature for
that period.

UPM

.E',_ J

I'LJ UPMs_ '
SL_

Press and release to return to
normal operation.

CHECKING THE CURRENT
TEMPERATURE SETTING
Press a single key to compare
current room temperature to the
settings at any time.

Press and release. The display will
show the current temperature
setting for several seconds, then
revert to the room temperature.

[

Applicable if thermostat is set for
Adaptive Intelligent Recovery_:
During recovery from energy
savings, the setting displayed will
not match the programmed setting.
This is because the thermostat
gradually changes the temperature
setting during recovery to provide
most efficient use of the heating or
cooling equipment.

68-0056--1

Startthesystem
bysetting
thethermostat
andobserving
system
response.
Ifproblem
occurs,
establish
symptom
and
usethefollowing
troubleshooting
charttocheckforpossible
causeandaction.
SYMPTOM
POSSIBLE CAUSE
ACTION
NO
[ROOM
IS -AC

TEMPE
(T8600,

RATU
DISPLAY
TB601, RET8609)

ac POWER

TO THERMOSTAT

i__ _

- ON-OFF
SWITCH
POWERCIRCUIT
TO
-CHECK
FUSE OR

FURNACE
BREAKER

- AT THERMOSTAT
- AT FURNACE/AIR
--

CONDITIONER
Ft_tNO

ac POWER

THERMOSTATi_-

[

AIR CONDITION

ER"

CONDITIONER

iNCORRECT
WIRING
OOSE 24 V CONNECTION
- CHECK
WIRING
DIAGRAM

CHECK

[_ ON'T OPERATE
FURNACE
OR AIR

POWER

FURNACE

ON OFF SWITH
] FUSE
OR ClRcCuIT

AIR CONDITIONER
"

BREAKER

- AT THERMOSTAT
- AT FURNACEJAIR

CONDITIONER

J-- INCORRECT
LOOSE
24 V WIRING
CONNECTION
- CHECK
WIRING
DIAGRAM

[ THERMOSTAT
PRESENT

INOPERATIVE

SETTING

t_I_[CONOtJ

TOO

LO_,HIGH

CT SELF-TEST;

_[ADJUST

BBE CI4ECKOUT.

]EMPERATLIRE

_Y PUSHING

" I*EYS"

WARMER/COOLER

I SWITCN'STAT
SYSTEMIN WRONG
SWITCh4

POSITION
ON THE RMO-

RESET

THERMOSTAT

SYSTEM

Ii
MINIMUM-OFF

TIMES

THERMOSTAT
ON COOLING

iN OPERATION

WAIT

5-10

MIN. OR

USE SELF

TEST

IN THERMOSTAT,

SEE CHECKOUT.

I_-_/
/£

[ INCORRECT WIRING

_[CHECK

CIRCUIT

DIAGRAM,

J SYSTEM
(T8600) NOT COMPATIBLE
L
J CONDITIONER
FURNACE OR AIR
INOPERATIVE

IPART,AL
DISPLAY

{NOOISPLAY

i-- NO OWERTOT.E.MOSTAT
i---* C.EOKT.AT.EATOROOOLSYBTEMPOW
|
RISO.

INOPERATIVE

THE RMOSTA-T--_I--_

RE'PLACE

ITNHcEoRRMROE%TTAL_
%_L _NATsE
?

NyOoORVERY

SHORT

IPR%Sc%NRTAST_tT INS

EXPECTED

NEEDS

REGULAR

F URNACE

A P PE A R S

"'bJ

_{"

WEEKENDS

BE ADJUSTED

BASIS

[LELOA%BIANqTERYINDICATOR

......

SYSTEM
(T8600,

NOT COMPATIBL

_[SEEI "L

MOUNTING'INSTALLATION INSTRUCTION_

FOR

CORRECT

r 'E%T . : ON:
'NSTALLAT
i

TMI4rl)F_ OS TA T I_ IN R EC 0 M E RY _'l

N ENAO[
_)i_?G
'RNM_tL
IE/ICT_)iC
O;t
ta_TIEaNRT:
iii
yi_s=D ED
_%%OESE'
T ,BMyEpSUS
TA; HETMUpRENRaON
[N G
RE

THERMOSTAT

REPI_OGRAM

USED

NOT

TO ADJUST

CHANGE

TEMPERATURE

FOR

WEEKENDS

IN PROGRAM.

TEMPORARY

UNLESS

PER

INSTRUCTIONS

WARMER/COOLER
PERIOD

KEYS

KEY IS PRESSED

ARE
FIRST.

/'1'NsTALLEDi_IIJRATTERIESAREINO°RREOTLY_
RE_OVEANDREPLACEPERMARKtN_SONT.ER_OSTA_I

BATTERIES

ARE

DEAD

ARE

INCORRECTLY

INSTALL_
POwERPROGRAM
TOOUTAGE
IS LOB]
ORDUE
DISPLAY
GOESBLANK
WHEN
POWER

THERMOSTAT.

_BATTER_FS

HE AT[NG

i_"

"
1-"

RIP'LACE

-_-I1_
I

I REMOVE

BATTERIES.

AND

REPLACE

COOLING

P_R

MARKINGS

ON THERMOSTAT

TEMPERATURE
CAN NOT
AU TQMATIC
THE RMOSTAT
SET CLOSER
THAN 3 ° F

BE
I _

REPLACE

BATTERIES"

Mt353

Adaptive Intelligent Recovery TM
Recovery automatically starts early enough so house is at
the comfort setting by the time chosen.

Set point
The temperature set on the thermostat. The thermostat
turns the heating or cooling equipment on and off to
maintain this temperature at the thermostat location until
another temperature setting goes into effect.

Comlort temperature
The temperature wanted in the morning and evening when
people are home.

Setup
Raising the temperature in the house for a set period every
day in summer for energy savings. The higher temperature
is the energy saving temperature.

Conventional Recovery
Recovery starts at the time programmed into the thermostat; house reaches comfort temperature shortly thereafter.

Status lights---Lights on some models that show system
operating mode.

Energy-saving
temperature
The lower (heating) or higher (cooling) temperature that
allows savings on heating and cooling costs when asleep
or away. Also called the setback (heating) or setup (cooling) temperature.

ENRG SAV light--This
and SLEEP periods.

SYSTEM light--This light glows whenever the thermostat is calling for heating or air conditioning.

Period key
One of the four keys--WAKE,
LEAVE, RETURN, or
SLEEP--to check or program the start time and temperature for a time period.

Sunday program schedule
The schedule of WAKE, LEAVE, RETURN and SLEEP
period start times and temperatures that homeowner programs to run on Sundays.

Preprogrammed schedule
This is the schedule programmed into your thermostat at
the factory. It sets a night program that provides energy
savings if homeowner doesn't set program, or if personal
program is lost for any reason. The program, which is the
same for all days of the week, is:

Period
WAKE
LEAVE
RETURN
SLEEP

Start
Time
6:00 AM
......
No
......
No
10:00 PM

light glows during the LEAVE

Time period
One of four program periods; WAKE, LEAVE, RETURN
and SLEEP available with the thermostat. One period
begins when the previous period ends.
WA KE_For conventional recovery, the time the recovery to the comfortable temperature begins; for Adaptive
Intelligent Recovery TM, the time period when homeowner wants the house at a comfortable temperature
while the family gets up and gets ready to leave for work
or school. This is the only period that must contain a
time and temperature.

Temperature
Heating
Cooling
70 ° F
78 ° F
program ........
program ........
60 ° F
780 F

Program
The times and temperatures set to define the comfort and
energy savings periods for each schedule (weekdays,
Saturday, Sunday).

LEAVE--The
time period when you can set back
(winter) or up (summer) the temperature for energy
savings because the family is usually away from home.
RETURN--For conventional recovery, the time the recovery to the comfortable temperature begins; for
Adaptive Intelligent Recovery TM, the time period when
homeowner wants the house at a comfortable temperature for family activities in the evening before bedtime.

Recovery
The time when the thermostat operates the heating or air
conditioning equipment to return the house from the onorgy savings to the comfort temperature. If thermostat is
set for Adaptive Intelligent Recovery TM, the thermostat
starts the recovery period early so the house will be at the
comfort setting by the time chosen.

SLEEP--The
time period when homeowner can set
back (winter) or up (summer) the temperature for energy savings because the family is sleeping. Set it to
start at your family's normal bedtime.

Saturday program schedule
The schedule of WAKE, LEAVE, RETURN and SLEEP
period start times and temperatures that homeowner programs to run on Saturdays.

Often the SLEEP program is set only for the heating
season so family members can sleep cool in summer.

Setback
Reducing the temperature in the house for a set period
every day in winter lor energy savings. The lower temperature is the energy savings temperature.

Weekday program schedule
The schedule of WAKE, LEAVE, RETURN and SLEEP
period start times and temperatures that homeowner programs to run Monday through Friday.

68-0056--1

1. Why do some
lights?

models

of this thermostat

have

rary setting will last until the next scheduled program
begins.

Battery-operated thermostats do not have indicator
tights to conserve battery power, Others may have one
ortwo indicator lights, depending upon the exact model
and application.

How can this thermostat save energy when it
comes on and off so many times early in the morning hours?
Two ways. First, it savesenergy (and money) by setting
back the temperature for blocks of time during the day
or night. Second, it conserves energy by recovering
gradually to the desired temperature. This prevents
overshooting your comfort set point (and wasting energy) or undershooting the comfort set point (and forcing you to change the thermostat setting, also wasting
energy).

2. The temperature
displayed
on the thermostat
doesn't always match the room temperature on another thermostat located right next to it. Why?
The thermostat is a very accurate instrument designed
to sense both air temperature and wall temperature,
much as your body does. It gives an average reading
over a period of time.
7.

3. Can I control when the turnace comes on in the
morning?
When the thermostat is set for Adaptive Intelligent Recovery TM, it will turn on the furnace as early as necessary to reach your desired comfort temperature at the
programmed time. The earliest it will be is 24 minutes
per degree setback ahead of your WAKE time, but it will
vary depending on your system, the weather and hew
much the temperature dropped in the house at night.

My thermostat has ENRG SAM and SYSTEM lights.
Why do they both go on at the same time? (For
example: during the sleep period.)
During Adaptive Intelligent Recovery TM, when you
recover graduallyto a next set point, you will stay in the
energy-saving mode until the next programmed time is
reached. But the system will operate intermittently to
gradually raise the temperature to your desired comfort
level before the time you've set as your WAKE time.
You will always be saving energy until the next period's
actual set point is reached.

If you want to control the start time yourself, just switch
the thermostat to conventional recovery following the
directions on page 25. This way, the furnace won't
come on until your programmed WAKE time, but of
course it will take a little while for your house to heat up
to the comfort temperature.

8°

Why don't all thermostat models have AUTO (automatic) changeover from heating to cooling?
Most parts of the country don't have wide temperature
swings during a 24-hour period, so it is not necessary.
Desert climates, such as Phoenix, are the exception,
because of wide variations in temperature which may
require both the air conditioner and furnace to run
during different times within a given 24-hour period.

Remember, whichever way you set your thermostat, if
it is so cold outside that your house drops to your sfeep
temperature, the furnace will turn on and off at night to
control the temperature at that setting.

4. What does the HOLD key do?

Sometimes my Chronotherm III thermostat doesn't
allow the house temperature to drop to my SLEEP
setting before it starts bringing the furnace on.
Why?

It bypasses allprogram settings and holdsthe temperature at the present setting. To increase or decrease the
temperature
while on HOLD, use the WARMERCOOLER keys. Touching RUN PROGRAM will return
the device to programmed operations.

When you start your SLEEP period, the thermostat will
turn off your furnace, and your house temperature will
start to fall. After that, the thermostat is out of the picture
until the house temperature falls all the way to your
SLEEP temperature setting or until recovery starts.

5. How long does the HOLD key hold?
Forever! The HOLD key will hold the temperature indefinitely. The only way to release it is to push the RUN
PROGRAM key or change the system switch positions
if applicable. For a temporary temperature change,
simply press WARMER or COOLER key. This tempo-

In mild weather or with good insulation, you r house temperature may not fall all the way to your SLEEP temperature setting and the thermostat won't turn on your
furnace until the time to recover back up to your comfort
setting.

page
SPECIFICATIONS

............................................................................................................................................................

ORDERING INFORMATION

............................................................................................................................................

INSTALLATION ................................................................................................................................................................4
Compatibility ............................................................................................................................................................... 4
Location....................................................................................................................................................................... 4
Mounting Wallplate ....................................................................................................................................................4
Wiring ..........................................................................................................................................................................5
Cycle Rate AdJustment ............................................................................................................................................20
Adaptive Intelligent RecoveryT_/ConventionalRecovery Conversion ................................................................20
Time/Temperature Conversion (Some Models) ..................................................................................................... 20
Fan Operation Switch............................................................................................................................................... 20
Installing Batteries ................................................................................................................................................... 21
Mounting the Thermostat ........................................................................................................................................ 21
Setting Day end Time ............................................................................................................................................... 21
CHECKOUT ....................................................................................................................................................................
Heating ......................................................................................................................................................................
Cooling ......................................................................................................................................................................
Fan .............................................................................................................................................................................
Installer Self-Test (optional) ....................................................................................................................................

22
22
22
23
23

ABOUT ADAPTIVE

RECOVERY

INTELLIGENT

RECOVERY

.......................................................................................................

SETTING PROCEDURE ............................................................................................................................

PROGRAMMING THE THERMOSTAT ..........................................................................................................................
Set the Current Day and Time .................................................................................................................................
Set the Program Schedule and Heating Temperatures ........................................................................................
Set the Cooling Temperatures ................................................................................................................................
Set the System and Fan Switches ..........................................................................................................................

25
25
25
27
29

OPERATING THE THERMOSTAT .................................................................................................................................
Temporarily Changing the Program .......................................................................................................................
Permanently Changing the Program ......................................................................................................................
Operating the Thermostat Manually .......................................................................................................................
Canceling Program Settings ...................................................................................................................................
Checking the Program Times and Temperatures .................................................................................................
Checking the Current Temperature Setting ...........................................................................................................

30
30
30
30
31
31
31

TROUBLESHOOTING

....................................................................................................................................................

GLOSSARY ....................................................................................................................................................................

TYPICAL HOMEOWNER

QUESTIONS .........................................................................................................................

This equipment is a Class B digital apparatus which corn plies with Canadian Radio Interference Regulations,

CRC c. 1374.

68-0056--1

Honeywell Inc.
1885 Douglas Drive N.
Golden Valley, MN 55422-4386

International Sales Offices in all principal cities of the world. Manufacturing in
Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands,
Spain, Taiwan, United Kingdom, U.S.A.
PRINTED IN U.S.A,

]

QUALITY

IS KEY

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HONEYWELL Controls And HVAC Accessories Manual L0712581

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