Honeywell C, L, L7224A, L7248A L7224, TH9421C R7184/R7284

L7224A,C; L7248A,C,L OIL AND ELECTRIC BOILER ELECTRONIC AQUASTAT® CONTROLLERS
68-0281—16 12
Fig. 10. L7224A,C single zone system with circulator and indirect water tank with EnviraCOM™ thermos tat.
M32025B
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
OPTIONAL FEATURE ON SELECT MODELS.
REFER TO DEVICE LABEL FOR WIRE COLOR CODE.
VALVE IS OPTIONAL ON SPECIFIED MODELS.
1
2
3
C1
B1
ZC
L2
LINE
C2
ZR
L1
B2
T
T3
3
3
2
2
2
1
1
1
SENSOR
LINE
VOLTAGE
CIRCULATOR
L7224
3
4
3
3
5
BURNER
MOTOR
IGNITER
VALVE
BURNER
MOTOR
IGNITER
VALVE
CAD
CELL
JUNCTION
BOX
TO REMOTE
ALARM
CIRCUIT
ENVIRACOM™
TERMINAL
TH9421C
R7184/R7284
LIMIT
L1
L2
2
CAD
CELL
T
T3
2
1
L1
(HOT)L2
1
LEGEND SCREW TERMINAL 1/4 IN. (6 MM) QUICK CONNECT TERMINAL
SOLDERLESS WIRE CONNECTION
ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR.
W8735S1000 WIRED OUTDOOR RESET MODULE SHOWN.
DUU MUST BE SET TO “ON” ON THE AQUASTAT.
5
6
1 2 3 OT OT
C7089U1006
OUTDOOR
SENSOR
6
W8735Y1000 OR
W8735S1000
7
INDIRECT
TANK
CIRCULATOR
LINE VOLTAGE
INDIRECT
TANK AQUASTAT
L2
7
4