Honeywell T87F Manuel utilisateur

CAUTION

1. Disconnect power supply to prevent electri-

cal shock or equipment damage.

2. To prevent interference with the thermostat

linkage, keep wire length to a minimum and

run wires as close as possible to the subbase.

3. Do not overtighten thermostat captive mount-

ing screws because damage to subbase threads

can result.

4. Do not short across coil terminals on relay.

This can burn out the thermostat heat antici-

pator.

IMPORTANT: An incorrectly leveled thermostat will

cause the temperature control to deviate from set

point.

LOCATION

Install 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 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) 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.

MOUNTING WALLPLATE OR SUBBASE (Fig. 2)

IMPORTANT:

1. Use a spirit level to accurately level the wallplate

or subbase as in Fig. 1. Inaccurate leveling may

cause thermostat control deviation.

2. When using the T87F with a Q539 Subbase, follow

the mounting and wiring instructions included with

the subbase.

1. Place the wallplate on the wall at the desired loca-

tion. Pull the thermostat cable through the entrance hole.

2. Fasten wallplate. Do not tighten the screws.

3. Level according to Fig. 1 then tighten screws.

4. After wiring wallplate, plug hole to prevent drafts

from affecting thermostat.

NOTE: To mount T87 Thermostat on an outlet box,

order 129044A Adapter Ring Assembly.

T87F

Universal Thermostat

Installation Instructions for the Trained Service Technician.

Application

The T87F Universal Thermostat provides tempera-

ture control for 24 to 30 Vac residential heating, cooling

or heating-cooling systems. For heating systems, the

T87F mounts on the wallplate provided. For cooling

only, or heating-cooling, order the 137421A (198170A

if textured designer model) Heating-Cooling Wallplate

with remote switching, or the Q539 Subbase, which

provides switching at the thermostat location.

The spdt switch makes one set of contacts on a tem-

perature fall to operate the heating system. The other set

of contacts make on a temperature rise to operate the

cooling system when the T87F is used to control cool-

ing.

Heat anticipation is adjustable, 0.1 to 1.2A.

Mercury Notice

This control contains mercury in a sealed tube. Do not

place control in the trash at the end of its useful life.

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old control in

the trash.

Contact your local waste management authority for

instructions regarding recycling and the proper disposal

of this control, or of an old control containing mercury in

a sealed tube.

If you have questions, call Honeywell Inc. at 1-

800-468-1502.

Installation and Setting

WHEN INSTALLING THIS PRODUCT…

1. Read these instructions carefully. Failure to fol-

low 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

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

M3375

TRADELINE

®U.S. Registered Trademark

60-0830-4

60-0830—4 2

Fig. 1—Leveling wallplate or subbase with

spirit level or plumb line.

SPIRIT

LEVEL LEVELING

POSTS (2)

MOUNTING

SLOTS

M3319A

OPENING FOR

THERMOSTAT

WIRING

Fig. 2—Mounting wallplate or subbase to wall.

M5324

WALLPLATE

SHOWN

THERMOSTAT CABLE

ENTRANCE HOLES

COVER RING

MOLDED

LEVELING

POST

NO. 4 X 1 INCH

SHEET METAL SCREWS (2) ADD T87F AS

SHOWN ON OUTLET

BOX MOUNTING

WIRING

All wiring must comply with local electrical codes

and ordinances. Disconnect power supply before con-

necting wiring to prevent electrical shock or equipment

damage.

The T87F is adaptable to most 2-wire, 24 to 30 volt

heating systems, and to most 3-wire, 24 to 30 volt

heating systems controlled by a Series 10 Thermostat.

The following hookups are typical applications. See

Figs. 3 through 7. When using the T87F for cooling

control, refer to the hookups in the Q539 Subbase in-

structions.

For variations of these systems, refer to the installa-

tion instructions for the controlled equipment.

After wiring the wallplate, plug the hole to prevent

drafts that may affect the thermostat.

Fig. 3—T87F used for 2-wire, spst control of

heating only in a typical oil system. Low

voltage power for the control circuit is supplied

by a transformer in the oil primary control.

L1 (HOT)

COMBINATION

FAN AND LIMIT

CONTROL

FAN

MOTOR

BURNER

MOTOR

THERMOSTAT

CAD

CELL

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.

M6105

Fig. 4—T87F used for 2-wire, spst control of

heating only in a typical gas system.

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

M5318

137421A

WALLPLATE

COMBINATION

FAN AND LIMIT

CONTROL

(HOT)

FAN

MOTOR

TRANSFORMER

GAS VALVE

TH TR

TRTH

LIMIT FAN

Fig. 5—T87F replacing a Series 10 Thermostat

connected to a 3-wire, open-contact, high-limit

control.

LOW LIMIT

OPERATING CONTROL

T87F

SERIES 10 OPEN

CIRCUIT HIGH LIMIT

JUMPER

TO THERMOSTAT

CONNECTIONS ON

SERIES 10 VALVE

AT BURNER

M6102

360-0830—4

Fig. 6—T87F used for Series 20, 3-wire, spdt

control of low-voltage motors and electric

radiator valves. Used in applications where

thermostat makes contact on both a rise and

fall in room temperature.

RED

WHITE

BLUE

137421A

WALLPLATE

RTR

(HOT)

THREE-WIRE SPDT

VALVE OR MOTOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED.

M5319

Fig. 7—T87F used in cooling-only system.

2. Let the system operate for one minute before read-

ing the ammeter.

3. Move the anticipator indicator to match the amme-

ter reading.

A slightly higher setting to obtain longer burner-on

times (fewer cycles per hour) may be desirable for some

systems.

RECALIBRATION

The T87F is calibrated at the factory and no recali-

bration should be necessary. If the thermostat is accu-

rately leveled and still appears to be out of calibration,

order 104994A Calibration Wrench. Instructions for

recalibrat-ing are furnished with the wrench.

Fig. 8—Setting heat anticipator current rating.

LONGER

.15 .12

1.0

HOLE SUITABLE FOR

PENCIL POINT

TO MOVE INDICATOR HEAT

ANTICIPATOR

INDICATOR

SCALE

M1368

Checkout

HEATING

Turn down temperature setting to the lowest point. If

subbase or remote switching is used, move system switch

to HEAT position. Raise temperature setting until heat-

ing equipment starts. This point should be at room tem-

perature as indicated on the thermometer. Slowly turn

back dial. Heating equipment should stop when dial has

been turned below room temperature.

COOLING

CAUTION

1. Do not operate cooling if outdoor tempera-

ture is below 50°F [10°C]. Refer to manu-

facturer recommendations.

2. Allow five-minute off-time after compres-

sor has been run to avoid compressor dam-

age.

If T87F controls cooling, move system switch (if

used) to call for COOL and lower setting until cooling

equipment starts. Raise setting above room temperature

and cooling system should shut down. Make certain all

equipment properly responds to the thermostat.

MOUNTING THERMOSTAT TO WALLPLATE

OR SUBBASE

To remove standard cover, pull ring outward with

fingertips, pressing lightly on dial with thumbs.

To remove locking cover, loosen the three screws

along the cover edge with the Allen wrench supplied.

Remove the cover as indicated above.

Remove and discard the plastic insert protecting the

mercury switch.

Align the thermostat over the wallplate and tighten

the three captive mounting screws. These captive screws

complete the electrical connections to the thermostat.

Adjust heat anticipator to match current rating of pri-

mary control. See Fig. 8.

HEAT ANTICIPATOR SETTING

If the T87F is used for 3-wire, spdt, heating-only

(Series 20) control (Fig. 6), set the heat anticipator for

1.2 (far left end of scale). A fixed resistor-type heater is

provided in the 137421A or 198170A Wallplate for this

application. For other control applications, proceed as

follows.

Adjust anticipator to match current rating of primary

control. Rating is usually stamped on the control name-

plate. Move the indicator to the marking that matches

this rating. Indicator may be moved with fingers or

pencil point through the hole shown in Fig. 8. If the

current rating is not given, proceed as follows before

mounting the thermostat:

1. Connect an ac ammeter of appropriate range (0 to

2.0A, for example) between the R and W terminals on

the wallplate or subbase.

THERMOSTAT WALLPLATE

OR SUBBASE

COOLING

CONTACTOR COIL

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

ONLY R AND Y TERMINALS ARE USED FOR COOLING ONLY.

M3516

Automation and Control Solutions

HoneywellInternational Inc. Honeywell Limited—Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9

60-0830—4 G.H. Rev. 8-02 www.honeywell.com/yourhome

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