Honeywell Q682B Manual page 11

Fig. 22—Internal schematic and typical hookup for T8090A Thermostat/Q682B Subbase with R
terminals jumpered for single transformer system; O and B terminals connected for control of dampers
or changeover valves.
CLOCK
T8090A
THERMOSTAT
Q682B
SUBBASE
C
L2
1
L1
(HOT)
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 ON SINGLE TRANSFORMER SYSTEMS (RH-RC JUMPERED) WITH O TERMINAL LOAD, SET THERMOSTAT HEAT
ANTICIPATOR TO ITS MAXIMUM SETTING AS COOLING ANTICIPATOR IN SERIES WITH O TERMINAL LOAD
PROVIDES HEAT ANTICIPATION IN THE HEATING CYCLE. (LIMIT THE THERMOSTAT HEATING LOAD CURRENT
TO 0.8 AMPS TO ASSURE GOOD PERFORMANCE.)
3 FIELD INSTALLED JUMPER.
C
H
FALL
HEAT
ANTICIPATOR
SYSTEM SWITCH
3
C
RH R RC
HEAT
DAMPER
C
H
FALL
HEAT
ANTICIPATOR
COOL
ANTICIPATOR
FAN
SWITCH
O
G
2
COOL FAN
DAMPER RELAY
11
c
W
Y
HEAT COMPRESSOR
RELAY CONTACTOR
and R
h
M1517A
69-0431—2