Fig. 1—Leveling wallplate or subbase with
spirit level or plumb line.
SPIRIT
LEVEL
OPENING FOR
THERMOSTAT
WIRING
Fig. 2—Mounting wallplate or subbase to wall.
MOLDED
LEVELING
POST
WALLPLATE
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 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.
60-0830—4
LEVELING
POSTS (2)
MOUNTING
SLOTS
M3319A
COVER RING
THERMOSTAT CABLE
ENTRANCE HOLES
ADD T87F AS
SHOWN ON OUTLET
BOX MOUNTING
M5324
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
T
R W
T
F
F
CAD
CELL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
R8184 PROTECTORELAY OIL PRIMARY CONTAINS
INTERNAL TRANSFORMER.
3
CONNECT OIL VALVE, IF APPLICABLE.
Fig. 4—T87F used for 2-wire, spst control of
heating only in a typical gas system.
Y
R
137421A
WALLPLATE
W
GAS VALVE
TH
TR
TH
TR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
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
T87F
Y
R
W
SERIES 10 OPEN
CIRCUIT HIGH LIMIT
2
COMBINATION
FAN AND LIMIT
CONTROL
FAN
MOTOR
OIL VALVE
IGNITION
R8184G
WHITE
2
ORANGE
BLACK
COMBINATION
FAN AND LIMIT
CONTROL
FAN
LIMIT
TRANSFORMER
JUMPER
B
B
TO THERMOSTAT
CONNECTIONS ON
W
W
SERIES 10 VALVE
AT BURNER
R
R
3
M6105
1
L1
(HOT)
L2
FAN
MOTOR
M5318
M6102