Honeywell T87F Manual de usuario
® U.S. Registered Trademark
Copyright © 2002 Honeywell • • All Rights Reserved
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.
S
PIRIT
L
EVEL LEVELIN
G
POSTS (2
)
MOUNTING
SLOTS
M3319A
O
PENING FOR
T
HERMOSTAT
W
IRING
M5324
W
ALLPLATE
S
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
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
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED. M5318
T87F
COMBINATION
FAN AND LIMIT
CONTROL
L1
(HOT
)
L2
FAN
MOTOR
TRANSFORMER
GAS VALVE
RY
W
TH TR
TRTH
LIMIT FAN
1
1
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
RW
B
W
R
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
W
Y
R
B
W
RTR
L1
(HOT
)
L2
THREE-WIRE SPDT
VALVE OR MOTOR
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED. M5319
1
1
Y
R
T
HERMOSTAT WALLPLATE
O
R SUBBASE
COOLING
CONTACTOR COIL
L1
(HOT
)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
ONLY R AND Y TERMINALS ARE USED FOR COOLING ONLY
.
1
2
1
2
M351
6
.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
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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