Honeywell T87F User Manual page 2

Fig. 2—Mounting wallplate or subbase to wall.
MOLDED
LEVELING
POST
WALL PLATE
SHOWN
NO. 4 X 1 INCH
SHEET METAL SCREWS (2)
WIRING
All wiring must comply with local electrical codes and
ordinances. Disconnect power supply before connecting
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 follow-
ing hookups are typical applications. See Figs. 3-6. 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 of 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)
1
L2
BURNER
MOTOR
THERMOSTAT
Y
R8184G
T
R
2
W
T
F
F
CAD CELL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
R8184 PROTECTORELAY OIL PRIMARY CONTAINS
2
INTERNAL TRANSFORMER.
60-1175—3
COVER RING
THERMOSTAT CABLE
ENTRANCE HOLES
ADD T87F AS
SHOWN ON OUTLET
BOX MOUNTING
COMBINATION FAN
LIMIT
AND LIMIT CONTROL
FAN
FAN
MOTOR
OIL VALVE
IGNITION
WHITE
ORANGE
BLACK
Fig. 4—T87F used for 2-wire, spst control of
heating only in a typical gas system.
R
W
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
Fig. 5—T87F replacing a series 10 thermostat
connected to a 3-wire, open-contact, high-limit
control.
LOW LIMIT
OPERATING CONTROL
THERMOSTAT
Y
R
W
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.
Y
R
T87F
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
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.
M6105
Adjust heat anticipator to match current rating of primary
control. See Fig. 7.
2
T87F
Y
GAS VALVE
TRANSFORMER
TR
TH
TH TR
B
W
R
SERIES 10 OPEN
CIRCUIT HIGH LIMIT
RED
R
TR
WHITE
W
BLUE
W
B
3-WIRE SPDT
VALUE OR MOTOR
COMBINATION
FAN AND LIGHT
CONTROL
FAN
LIMIT
1
L1
(HOT)
L2
FAN
MOTOR
M5318
JUMPER
B
TO THERMOSTAT
CONNECTIONS ON
W
SERIES 10 VALVE
AT BURNER
R
M6102
L1
(HOT)
L2
1
POWER
SUPPLY
M5319