Honeywell Thermostat T87F Users Manual 60 2222 Family

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PRODUCT DATA

60-2222-3

® U.S. Registered Trademark

Copyright © 2002 Honeywell • All Rights Reserved

T87F Thermostats

APPLICATION

T87F Thermostats provide temperature control for residential

heating, cooling, or heating-cooling systems. The T87F is

designed with a dustproof spdt mercury switch, an adjustable

heat anticipator and a concealed wallplate for 2-wire heating

hookups. The Tradeline® T87F wallplate is designed for 2-

wire heating or cooling, 3-wire spdt heating (series 20), or 3-

wire spdt heating-cooling with remote switching. The wallplate

also provides cooling anticipation.

The Q539 Subbase may be added for system and fan

switching. The Q539 Subbase also provides cooling

anticipation.

FEATURES

• For 24 Vac to 30 Vac control of heating or cooling

systems.

• Thermostat cover ring may be painted to match room

decor.

• Knurled dial provides easy setpoint adjustment.

• Separate temperature setting and thermometer scale

located on face of thermostat.

• T87F distinctive style makes an attractive addition to

almost any decor.

• Enhanced setpoint visibility model available for the

visually impaired.

T87F Easy-to-

See™ Round

Model

T87F Designer

Model

T87F Standard

Model

Contents

Application.........................................................................1

Features ............................................................................1

Specifications ....................................................................2

Ordering Information .........................................................2

Installation .........................................................................3

Wiring ................................................................................4

Settings and Checkout ......................................................7

Operation...........................................................................8

Recalibration .....................................................................8

T87F THERMOSTATS

60-2222—3 2

SPECIFICATIONS

IMPORTANT

This product is tested and calibrated under closely

controlled conditions and some minor differences in

performance can be expected if those conditions are

changed. The specifications in this publication do not

include normal manufacturing tolerances; therefore,

an individual unit may not exactly match the listed

specifications.

Tradeline® Models:

For use in series 80 heating, cooling, or heating-cooling

circuit, or for use in series 20 (spdt) heating only circuit.

Tradeline® specifications are the same as those of standard

models, except as follows:

T87F Heating, Cooling, or Heating-Cooling Thermostat.

T87F Enhanced Setpoint Visibility Model for the visually

impaired.

T87F models that meet Department of Defense (DoD) Manual

4270.1-M specifications.

Model for heating. control. Locking cover, without thermome-

ter, 72°F (22°C) maximum heat.

Model for cooling control, locking cover, without thermometer,

78°F 26°C) minimum cool.

T87F with locking cover, range stops 35°F to 65°F (2°C to

18°C) range.

Temperature Ratings:

Setting Range:

Most models: 40°F to 90°F (4°C to 32°C).

Models with positive Off: 50°F to 90°F (10°C to 32°C).

Mounting:

T87F (without positive Off) furnished with 137421A Wallplate.

T87F (with positive Off) furnished with 137421B Wallplate.

Both wallplates suitable for controlling 2-wire spst heating or

cooling, 3-wire spdt heating-cooling, or 3-wire spdt series

20 heating systems.

Additional Tradeline® Features:

Cover ring included for covering old thermostat marks or for

mounting T87F on outlet box.

137421 Wallplate extends beyond thermostat for trim appear-

ance (198170A Wallplate for Designer Models).

Tradeline® pack with cross reference label and special

instruction sheet.

Standard Models:

T87F Heating, Cooling, or Heating-Cooling Thermostat. Ther-

mostat includes 104456B Wallplate for heating only sys-

tems. Order Q539 Subbase for heating-cooling.

Electrical Ratings: 1.5A at 30 Vac.

Heat Anticipator: Adjustable 0.1 to 1.2A.

Cooling Anticipator: 0 to 1.5A, 24 Vac to 30 Vac.

Temperature Ratings: 50°F to 100°F (10°C to 38°C).

Switching Action: Dust-free spdt mercury switch.

Temperature Sensing: Coiled bimetal.

Dimensions:

T87F: 3-1/4 in. (82.5 mm) diameter, 1-1/2 in. (38 mm) deep.

With 137421 Wallplate: 3-11/16 in. (93.5 mm) diameter, 1-3/4

in. (44.5 mm) deep.

With Q539 Subbase: 3-11/16 in. (93.5 mm) diameter, 1-3/4 in.

(44.5 mm) deep.

Mounting: Thermostat mounts on furnished wallplate, or sub-

base (order separately).

Finish: Premier White® or taupe.

Optional Specifications:

Positive Off Models (specify heating or cooling):

60°F to 100°F (16°C to 38°C) or 50°F to 90°F (10°C to

32°C) range.

Locking Cover and Range Stop Models:

60°F to 90°F (16°C to 32°C).

45°F to 75°F (7°C to 24°C) range, 68°F marked on scale.

Scale Range Models:

40°F to 90°F (4°C to 32°C).

45°F to 75°F (7°C to 24°C).

5°C to 30°C (67°F to 112°F).

10°C to 30°C (67°F to 86°F).

10°C to 35°C (67°F to 95°F).

T87F THERMOSTATS

3 60-2222—3

Accessories:

Q539 Subbases—provide system and fan switching and cool-

ing anticipation (unless otherwise specified) for T87F heat-

ing, cooling and heating-cooling thermostats.

TG587F1008 Thermostat Guard Key Lock Cover with window.

TG587F1016 Thermostat Guard Key Lock cover without

window.

104456B Two terminal heat only T87 Wallplate.

137421AE-T87 Taupe Wallplate with positive Off.

137421K-T87 Taupe Wallplate without positive Off.

137421R-T87 White Wallplate.

198170A Designer Beige Adapter Kit.

198172 Cover Ring for T87 Designer Beige models.

199933 Cover Ring for Taupe T87 models.

114855-00029 Cover Ring for Gold T87 models.

137421A-T87 Gold Wallplate without positive Off.

137421B-T87 Gold Wallplate with positive Off.

221886A Easy-to-Use™ Clear Ring. Durable plastic ring

snaps on Easy-to-See models.

202687A Premier White® Adapter Kit includes 6 in. cover

assembly and adapter ring to mount on outlet box or cover

marks from old thermostats.

32005439-001 Taupe Adapter Kit includes 6 in. cover assem-

bly and adapter ring to mount on outlet box or cover marks

from old thermostat.

MERCURY 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 properly.

Contact your local waste management authority for

instructions regarding recycling and the proper

disposal of an old control.

INSTALLATION

CAUTION

Voltage Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before beginning installation.

CAUTION

Equipment Damage Hazard.

Improper installation can burn out thermostat heat

anticipator.

On systems using a low voltage gas valve, do not

apply a jumper across the valve coil terminals.

When Installing this Product. . .

1. Read these instructions carefully. Failure to follow them

could cause a hazardous condition.

2. Check the ratings given in the instructions and on the

product to make sure the product is suitable for your

application.

3. Installer must be a trained experienced service techni-

cian.

4. After installation is complete, check out product opera-

tion as provided in these instructions.

Location

Locate the thermostat about 5 ft (1.5m) above the floor in an

area with good air circulation at average temperature.

Do not install the thermostat where it can 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) areas such as an outside wall behind

the thermostat.

This thermostat is a precision instrument and was carefully

adjusted at the factory. Handle it carefully.

Mount Wallplate or Subbase

IMPORTANT

Use a spirit level to accurately level the wallplate or

subbase as shown in Fig. 1. Inaccurate leveling may

cause the thermostat to deviate from setpoint.

When using the T87F with a Q539 Subbase, follow

the mounting and wiring instructions for the subbase.

Use the cover ring (if desired), adapter plate (if needed),

wallplate or subbase, T87F and screws as shown in Fig. 2 and

3.

IMPORTANT

Before mounting the thermostat, see Setting and

Checkout section, Heat Anticipator Adjustment sub-

section.

1. Place the cover ring on the wall at the desired location

with the cable entrance holes to the left.

NOTE: If an outlet box is used, place the cable entrance

holes toward the bottom. The side showing MADE IN

U.S.A. must be against the wall.

2. Pull the thermostat cable through the entrance hole of

the cover ring and the entrance hole of the wallplate or

subbase and adapter plate (if used).

3. Fasten the cover ring, adapter plate (if used), and the

wallplate or subbase.

4. Level the wallplate as shown in Fig. 1 and tighten the

screws.

5. After wiring the subbase or wallplate, plug the hole to

prevent interior wall drafts from affecting the thermostat.

6. Align the thermostat over the wallplate and tighten the

three captive mounting screws.

T87F THERMOSTATS

60-2222—3 4

Fig. 1. Level 104456B, 137421A,B,D Wallplates.

Fig. 2. Mount T87F, 104456B Wallplate.

Fig. 3. Mount T87F, Q539 Subbase or 137421 Wallplate to

outlet box.

WIRING

CAUTION

Voltage Hazard.

Can cause electrical shock or equipment damage.

Disconnect power before beginning installation.

IMPORTANT

All wiring must comply with local electrical codes and

ordinances.

The T87F may be used in most 2- or 3-wire, spst or spdt, 24

Vac to 30 Vac heating systems controlled by a low voltage

thermostat. The following wiring diagrams represent typical

applications.

SPIRIT

LEVEL LEVELING

POSTS (2)

MOUNTING

SLOTS

SPIRIT LEVEL

104456B WALLPLATE

1

37421A,B,D WALLPLATE

MOUNTING

SLOTS

BE SURE WAL

L

HOLE IS

PLUGGED

MOUNTING

SLOTS

TERMINAL

SCREWS

M20772

OPENING FOR

THERMOSTAT

WIRING

T87F

THERMOSTAT

COVER RING

M2077

3

THERMOSTA

T

COVER RING

MOUNTING

SLOTS (4)

THERMOSTAT

CABLE OPENING

104456B WALLPLATE

OUTLET BOX

127293

COVER RING

Q539 SUBBASE

M2077

4

THERMOSTAT

CABLE

ENTRANCE

HOLES

137421

WALLPLATE

CAPTIVE

MOUNTING

SCREWS (3)

T87F

1

1

2

2

IF OUTLET BOX IS HORIZONTAL, MOUNT COVER RING IN POSITIO

N

SHOWN, BUT FASTEN WITH SCREWS THROUGH "A".

USE 137421A,B WALLPLATE FOR HEAT OR COOL APPLICATIONS

WITHOUT SWITCHING. USE Q539 SUBBASE FOR HEAT OR COOL

APPLICATIONS WITH SWITCHING.

T87F THERMOSTATS

5 60-2222—3

Fig. 4. Internal wiring for T87F Heating Only Thermostat.

Fig. 5. Internal wiring for T87F Cooling Only Thermostat.

Fig. 6. Internal wiring for Tradeline® T87F Thermostat.

Fig. 7. Typical wiring for T87F used as a Cooling Only

Thermostat.

TEMPERATURE FALL

ADJUSTABLE

HEAT

ANTICIPATOR

R1

R

Y1

W1

W

1

3

2

1

2

3

T87F

THERMOSTA

T

104456B

WALLPLATE

TO SYSTEM CONNECTIONS

HEATING ONLY THERMOSTAT

MODEL WITH POSITIVE OFF SWITCH OPENS THE THERMOSTAT CIRCUIT

WHEN SETPOINT DIAL IS MOVED TO THE OFF POSITION.

MAKE SYSTEM WIRING CONNECTIONS TO TERMINALS ON 104456B

WALLPLATE.

R1, W1 TERMINALS ON THERMOSTAT ARE DIRECTLY CONNECTED TO

R, W TERMINALS ON WALLPLATE WHEN THERMOSTAT IS MOUNTED

ON WALLPLATE.

M18011

TEMPERATURE RISE

R1

R

Y1

W1

Y

1

3

2

1

2

3

T87F

THERMOSTA

T

137421D

WALLPLATE

COOLING

ANTICIPATOR

TO SYSTEM CONNECTIONS

COOLING ONLY THERMOSTAT

MODEL WITH POSITIVE OFF SWITCH OPENS THE THERMOSTAT

CIRCUIT WHEN SETPOINT DIAL IS MOVED TO THE OFF POSITION.

MAKE SYSTEM WIRING CONNECTIONS TO TERMINALS ON 137421D

WALLPLATE.

R1, W1 TERMINALS ON THERMOSTAT ARE DIRECTLY CONNECTED TO

R, Y TERMINALS ON WALLPLATE WHEN THERMOSTAT IS MOUNTED

ON WALLPLATE. M20775

TEMPERATURE FALL

ADJUSTABLE

HEAT

ANTICIPATOR

COOLING

ANTICIPATOR

R1

R

Y1

W1

W

1

3

2

1

2

3

T87F

THERMOSTAT

137421A,B

WALLPLATE

TO SYSTEM CONNECTIONS

TRADELINE THERMOSTAT

MODEL WITH POSITIVE OFF SWITCH OPENS THE THERMOSTAT

CIRCUIT WHEN SETPOINT DIAL IS MOVED TO THE OFF POSITION.

MAKE SYSTEM WIRING CONNECTIONS TO TERMINALS ON 137421A,B

WALLPLATE.

R1, W1, Y1 TERMINALS ON THERMOSTAT ARE DIRECTLY CONNECTED T

O

R, W, Y TERMINALS ON WALLPLATE WHEN THERMOSTAT IS MOUNTED

ON WALLPLATE.

Y

M20776

1

L1

(HOT

)

L2

1

THERMOSTAT

COOLING

CONTACTOR COIL

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED. M610

1

RY

T87F THERMOSTATS

60-2222—3 6

Fig. 8. T87F in typical oil heating system.

Fig. 9. T87F in typical gas heating system.

Fig. 10. T87F in heating-cooling application with remote

mounted system changeover switch. (Use Q539 Subbase

for switching at thermostat location.)

To Replace a Series 10 Thermostat

To adapt the T87F to a series 10 three-wire heating system:

1. Connect the wires from the thermostat (R and W) to the

terminals on the three-wire primary (B and W). See Fig.

11 and 12.

NOTES:

— Some three-wire controls manufactured by other

companies cannot be satisfactorily operated by a

two-wire thermostat.

— Before connecting the T87F to a three-wire con-

trol, consult the manufacturer.

— Some Honeywell series 10 relays require an R-B

jumper (see Fig. 11). These relays are:

R114A,B R125 R117 R187A1,A4

R116 R126 R178 R190B1,B8

R117 R161 R180

— Relays or valves that do not require a jumper may

retain a three-wire, low limit control as shown in

Fig. 11. If the jumper is required, a two-wire con-

trol must be used.

— A three-wire, open contact, high-limit control

requires a jumper as shown in Fig. 12.

Fig. 11. T87F (replacing a series 10 thermostat) connected

to a 2- or 3-wire low limit control.

L2

COMBINATION FAN

AND LIMIT CONTROL

FAN

MOTOR

BURNER

MOTOR

THERMOSTAT

Y

RW

CAD CELL

1

2

3

R8184G

WHITE

ORANGE

BLACK

IGNITION

OIL VALVE

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

R8184 PROTECTORELAY OIL PRIMARY CONTAINS

INTERNAL TRANSFORMER

CONNECT OIL VALVE, IF APPLICABLE.

2

1

T

F

M6105

A

T

F

L1

(HOT)

3

R

W

1

L1

(HOT

)

L2

FAN

MOTOR

COMBINATION FAN AND

LIGHT CONTROLLER

LIMIT FAN

TRANSFORMER

GAS VALVE

THERMOSTAT

TH

TH TR

TR

M6103

1POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

L1

(HOT

)

L2

TRANSFORMER

THERMOSTAT

M6104A

1

1

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

RY

WCOOLING

CONTACTOR COIL

ISOLATING

RELAY

HEAT

POSITION

REMOTE

CHANGEOVER

SWITCH

OIL PRIMARY

COOL

POSITION

2-WIRE LOW LIMIT

OPERATING CONTROL

JUMPER

MAY BE

REQUIRED

T87F

SERIES 10

RELAY OR VALVE

3-WIRE LOW-LIMIT OPERATING

CONTROL MAY BE RETAINED

ONLY IF R-B JUMPER IS NOT

REQUIRED ON RELAY OR VALVE

M2077

7

Y

R

W

R

R

B

B

W

W

W

B

R

T87F THERMOSTATS

7 60-2222—3

Fig. 12. T87F (replacing a series 10 thermostat) connected

to a 3-wire open contact, high-limit control.

To Replace a Series 20 Thermostat

Tradeline® T87F Thermostats directly replace series 20 spdt

thermostats, or thermostats in heating installations that

require contact on both a rise and fall in temperature (see Fig.

13).

Fig. 13. Tradeline® T87F in Series 20 Heating Circuit.

To wire a series 20 thermostat:

SETTINGS AND CHECKOUT

Temperature Selection

To select the desired temperature, turn the transparent dial

until the desired point on the setting scale (top scale) is in line

with the pointer.

On models with range stops the temperature range may be

limited at either extreme. The left stop is for the low extreme,

the right stop for the high extreme (see Fig. 14).

Heat Anticipator Adjustment

The thermostat has an adjustable heat anticipator that must

be set on the number that corresponds to the current rating of

the primary control of the system (for example; gas valve, oil

primary).

Fig. 14. T87F interior detail.

Fig. 15. Adjust heat anticipator to match current rating of

primary control.

Series 20 Thermostat T87F Thermostat

RR

BW

WY

LOW LIMIT

OPERATING CONTROL

T87F

SERIES 10 OPEN

CIRCUIT HIGH LIMIT

JUMPER

TO THERMOSTAT

CONNECTIONS ON

SERIES 10 VALVE

AT BURNER

M6102

B

W

R

Y

R

W

B

W

R

137421A

WALLPLATE

SERIES 20

MOTOR OR VALVE

LEVEL LEVEL

TRANSFORMER

L1

(HOT)

L2

M2077

8

R B W

Y

R

W

TR TR

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

MAKE CONNECTIONS AS SHOWN: R TO R, W TO B, Y TO W.

1

2

1

2

CAPTIVE

MOUNTING

SCREW (3)

HEAT ANTICIPATOR INDICATOR

ROOM TEMPERATURE SCAL

E

M19049

CALIBRATION NUT

SETTING SCALE

ADJUSTABLE RANGE

STOPS ON SOME MODELS

.15 .12

.2

.6

.8

1.0

.5

.4

.3

HOLE SUITABLE FOR

PENCIL POINT

TO MOVE INDICATOR

HEAT

ANTICIPATOR

INDICATOR

S

CALE

M1368

A

T87F THERMOSTATS

60-2222—3 G.H. Rev. 8-02 www.honeywell.com/yourhome

Automation and Control Solutions

Honeywell Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

IMPORTANT

When the T87F is used in a series 20 heating circuit

(requires contact on both a rise and fall in tempera-

ture), set the anticipator indicator to 1.2.

If the current rating is not known, proceed as follows:

1. Connect an ac ammeter of appropriate range (for exam-

ple; 0 to 2A) between the R and W terminals on the

wallplate, or between R and W on the subbase.

2. Let the system operate through the ammeter for at least

one minute before taking the reading.

3. Set the heat anticipator to correspond to the ammeter

reading (see Fig. 15).

4. A slightly higher setting to obtain longer burner-on times

(and fewer cycles per hour) may be desirable in sys-

tems such as a one-pipe steam system. For example:

• if burner on-time is too short with a heater setting of

0.4, adjust to the 0.45 setting and check the system

operation, then

• adjust to the 0.5 setting and recheck until the desired

burner-on time is obtained.

OPERATION

CAUTION

Equipment Damage Hazard.

Improper installation can burn out thermostat heat

anticipator.

On systems using a low voltage gas valve, do not

apply a jumper across the valve coil terminals.

To check thermostat operation:

1. Turn down the temperature setting to the lowest point.

2. If the subbase is used, move the system switch to the

HEAT position.

3. Raise the temperature setting until the burner starts.

4. Slowly turn the dial back. (The burner should stop when

the dial has been turned down below the room tempera-

ture.)

5. If the T87F controls cooling, move the subbase system

switch (if used) to COOL and lower the setting until the

cooling equipment starts.

6. Raise the setting above the room temperature and the

cooling system should shut down.

7. Make certain that the equipment functions properly in

response to the thermostat.

RECALIBRATION

IMPORTANT

— If the thermostat scaleplate moves (pointer is station-

ary) when setting the temperature, the thermostat is

a Group I model.

— If the scaleplate is stationary and the pointer moves,

the thermostat is a Group II model.

The T87F is accurately calibrated at the factory under

controlled conditions and no recalibration should be

necessary. If it appears that the thermostat is out of

calibration, make sure that it is level and is not subjected to

radiant heat from the sun, radiators, or appliances.

Remove the thermostat cover ring so you can observe the

mercury switch action. After a five- or ten-minute off-period

(with thermostat setting below the room temperature), slowly

raise the setting until the switch just makes contact. If the

thermometer pointer and setting indicator read the same the

instant you see the switch make, no recalibration is

necessary. If recalibration is necessary, proceed as follows:

1. Turn the setting dial a few degrees above the room tem-

perature and remove the cover.

2. Slip the 104994 Calibration Wrench (available on

request) onto the hex under the bimetal coil (see Fig.

14).

3. Hold the dial firmly, and turn the hex counterclockwise

for Group I models and clockwise for Group II models,

until the mercury breaks contact.

4. Turn the dial to a low setting so that the thermostat

loses the heat it has gained from your hands and its

own operation.

5. Wait at least five minutes.

6. Slowly turn the dial until the pointers read the same.

7. Firmly hold the dial—carefully turning the hex clockwise

for Group I models, counterclockwise for Group II mod-

els—until the mercury switch slips to the heating contact

end of the tube.

8. Recheck the calibration, select the desired temperature

and replace the cover.

NOTE: When the T87F provides cooling control, calibration

for heating automatically calibrates for cooling.