Honeywell Q682B Application Manual page 2

A letter code is located near each terminal for easy
identification.
The shape of the terminal barrier permits insertion of
straight or conventional wraparound wiring connections.
Either method is acceptable. When making wiring connec-
tions, strip wire to length specified in Fig. 2.
Fig. 2—Barrier configuration.
FOR STRAIGHT
CONNECTION—
STRIP 5/16 in. [8 mm]
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 in. [11 mm]
The Q682B or D Subbase allows the T8082A or
T8085A,B,C Thermostat clock to be powered by the sys-
tem transformer or separate 24 Vac transformer. The Q682B
also allows the T8090A Thermostat clock to be powered by
the system transformer, separate 24 Vac transformer, bat-
teries, or through the control system. Refer to Figs. 3 and 4
for hookup diagrams of a T8090A powered through the
control system.
The Q682L Subbase uses a separate clock transformer.
Ensure 24V exists between the R and X terminals. Wire the
X terminal to transformer common to operate the LEDs and
24V clock.
Follow the equipment manufacturer wiring instructions,
if available. If not available, refer to typical system hook-
ups in Figs. 5 through 12.
Push any excess wire back into wall and plug the hole
carefully to prevent drafts from affecting the thermostat. To
mount and adjust thermostat, see the instructions included
with the thermostat.
60-1179—7
Fig. 3—Typical hookup for T8090A Thermo-
stat clock powered through the control
system. Clock powered by battery when
heating or cooling equipment is on; clock
steals power from system when heating
equipment is off.
BARRIER
M1556B
Fig. 4—Typical hookup for T8090A Thermo-
stat clock powered through the control
system. Clock powered by battery when
heating or cooling equipment is on; clock
steals power from system when cooling
equipment is off.
SUBBASE
2
THERMOSTAT
CLOCK
BATTERY
3
C C RH
SUBBASE
L1
(HOT)
1
L2
L1
(HOT)
1
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 JUMPER RH-RC TERMINALS WHEN ONE TRANSFORMER
POWERS BOTH HEATING AND COOLING.
3 FOR POWER STEALING ON HEATING, JUMPER
C-RH AND C-W TERMINALS.
THERMOSTAT
CLOCK
BATTERY
3
C C RH
L1
(HOT)
1
L2
L1
(HOT)
1
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 JUMPER R H-RC TERMINALS WHEN ONE TRANSFORMER
POWERS BOTH HEATING AND COOLING.
3 FOR POWER STEALING ON HEATING, JUMPER
C-RC AND C-Y TERMINALS.
RC
W Y
2
HEAT
RELAY
COMPRESSOR
CONTACTOR
M1514B
RC
W Y
2
HEAT
RELAY
COMPRESSOR
CONTACTOR
M720