Honeywell T87F Bedienungsanleitung

® U.S. Registered Trademark

INSTALLATION INSTRUCTIONS

95-6731-6

T87F Universal Thermostat

APPLICATION

The T87F Universal Thermostat provides temperature

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 for

textured designer model) Heating-Cooling Wallplate with

remote switching, or the Q539 Subbase that provides

switching at the thermostat location.

The spdt switch makes one set of contacts on a

temperature fall to operate the heating system. The other

set of contacts makes on a temperature rise to operate

the cooling system when the T87F is used to control

cooling.

Models with positive Off feature break the electrical

circuit to prevent system operation when the switch is

moved to the Off position. These models use the

137421B Wallplate for cooling or heating/cooling

systems.

Heat anticipation is adjustable, 0.1 to 1.2A.

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.

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.

INSTALLATION AND SETTING

When installing this Product…

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous 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.

IMPORTANT

The T87F was carefully adjusted at the factory.

Handle the thermostat carefully; rough handling

can decrease its accuracy.

CAUTION

Electrical Hazard.

Electrical shock can cause personal injury or

equipment damage.

Disconnect power supply before beginning

installation.

CAUTION

Equipment Damage Hazard.

Causing terminal shorts can burn out heat

anticipator.

Do not short across relay coil terminals.

Location

Select a location about 1.5m (5 ft) above the floor in an

area with good air circulation at average temperature.

Do not mount 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 the sun or appliances.

— concealed pipes and chimneys.

— unheated (uncooled) areas behind the thermostat.

Mounting subbase wallplate (Fig. 2)

IMPORTANT

1. Use spirit level to accurately level the wallplate

or subbase; see Fig. 1. Inaccurate leveling can

cause thermostat control deviation.

2. When using the T87F with a Q539 Subbase, fol-

low the mounting and wiring instructions

included with the subbase.

1. Place wallplate on wall at desired location. Pull

thermostat cable through entrance hole.

2. Fasten wallplate but do not tighten screws.

T87F UNIVERSAL THERMOSTAT

95-6731—6 2

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.

Fig. 1. Leveling wallplate or subbase with spirit level.

Fig. 2. Mounting wallplate or subbase to wall.

WIRING

All wiring must comply with local electrical codes and

ordinances.

CAUTION

Electrical Hazard.

Electrical shock can cause personal injury or

equipment damage.

Disconnect power supply before beginning

installation.

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 with a Series 10 Thermostat.

See Fig. 3-7 for typical application hookups. When using

the T87F for cooling control, refer to the hookups in the

Q539 Subbase instructions.

For variations of these systems, refer to the installation

instructions for the controlled equipment.

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

only in a typical oil system. Low voltage power for

control circuit is supplied by transformer in oil

primary control.

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

only in a typical gas system.

Fig. 5. T87F replacing Series 10 Thermostat

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

PIRIT

EVEL LEVELIN

POSTS (2

)

MOUNTING

SLOTS

M3319A

PENING FOR

HERMOSTAT

IRING

M5324

ALLPLATE

HOWN

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

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

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED. M5318

T87F

COMBINATION

FAN AND LIMIT

CONTROL

(HOT

)

FAN

MOTOR

TRANSFORMER

GAS VALVE

TH TR

TRTH

LIMIT FAN

LOW LIMIT

OPERATING CONTROL

T87F

SERIES 10 OPEN

CIRCUIT HIGH LIMIT

JUMPER

TO THERMOSTAT

CONNECTIONS ON

SERIES 10 VALVE

AT BURNER

M6102

T87F UNIVERSAL THERMOSTAT

3 95-6731—6

Fig. 6. T87F used for series 203-wire, spst control of

low-voltage motors and electric radiator valves. Used

in applications where thermostat makes contact on

both rise and fall in room temperature.

Fig. 7. T87F used in cooling only system.

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 primary

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

nameplate. Move the indicator to the marking that

matches this rating. Indicator may be moved with fingers

or pencil point through 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.

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

reading the ammeter.

3. Move the anticipator indicator to match the amme-

ter reading.

NOTE: A slightly higher setting to obtain longer burner-

on times (fewer cycles per hour) may be desir-

able for some systems.

RECALIBRATION

The T87F is calibrated at the factory; recalibration should

not be necessary. If the thermostat is accurately leveled

but continues to be out of calibration, order 104994A

Calibration Wrench. Instructions for recalibrating are

included with wrench.

Fig. 8. Setting heat anticipator current rating.

CHECKOUT

Heating

1. Turn down temperature setting to lowest point. If

subbase or remote switching is used, move

System switch to Heat position.

2. Raise temperature setting until heating equipment

starts.

3. Lower temperature setting below room tempera-

ture and heating system should shut down.

4. Make certain all equipment responds properly to

the thermostat.

5. Heating equipment should stop when dial is turned

below room temperature.

Cooling

CAUTION

Equipment Damage Hazard.

Operating cooling equipment within

guidelines can prevent compressor damage.

Do not operate cooling when outdoor

temperature is below 10°C (50°F).

Allow five-minute off-time after compressor has

run before restarting.

1. If T87F controls cooling, move System switch (if

used) to Cool postition.

2. Lower temperature setting until cooling equipment

starts.

3. Raise setting above room temperature and cooling

system should shut down.

4. Make certain all equipment responds properly to

the thermostat.

RED

WHITE

BLUE

T87F

RTR

(HOT

)

THREE-WIRE SPDT

VALVE OR MOTOR

POWER SUPPLY. PROVIDE DISCONNECT MEANS

AND OVERLOAD PROTECTION AS REQUIRED. M5319

HERMOSTAT WALLPLATE

R 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

M351

.15 .12

1.0

HOLE SUITABLE FOR

PENCIL POINT

TO MOVE INDICATOR HEAT

ANTICIPATOR

INDICATOR

CALE

M1368

95-6731—6 G.H. Rev. 8-02 www.honeywell.com/yourhome

T87F UNIVERSAL THERMOSTAT

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

Automation and Control Solutions

Honeywell Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

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