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Honeywell L7224A Installation Instructions Manual page 12

Oil and electric boiler
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L7224A,C; L7248A,C,L OIL AND ELECTRIC BOILER ELECTRONIC AQUASTAT
R7184/R7284
5
ENVIRACOM™
TERMINAL
TO REMOTE
ALARM
2
CIRCUIT
LEGEND
SCREW TERMINAL
SOLDERLESS WIRE CONNECTION
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
OPTIONAL FEATURE ON SELECT MODELS.
3
REFER TO DEVICE LABEL FOR WIRE COLOR CODE.
4
VALVE IS OPTIONAL ON SPECIFIED MODELS.
Fig. 10. L7224A,C single zone system with circulator and indirect water tank with EnviraCOM™ thermostat.
68-0281EFS—07
3
2
TH9421C
T
LIMIT
T 3
L1
L2
2
1
3
BURNER
BURNER
MOTOR
MOTOR
3
IGNITER
IGNITER
3
VALVE
VALVE
CAD
CAD
CELL
CELL
JUNCTION
BOX
1/4 IN. (6 MM) QUICK CONNECT TERMINAL
W8735Y1000 OR
W8735S1000
1
1 2 3 OT OT
C7089U1006
6
OUTDOOR
SENSOR
L1
3
2
1
(HOT) L2
1
L7224
SENSOR
7
ZR
L1
LINE
VOLTAGE
L2
CIRCULATOR
4
C2
B2
C1
B1
ZC
5
ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.
6
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR.
W8735S1000 WIRED OUTDOOR RESET MODULE SHOWN.
DUU MUST BE SET TO "ON" ON THE AQUASTAT.
7
12
®
CONTROLLERS
LINE VOLTAGE
INDIRECT
TANK AQUASTAT
INDIRECT
TANK
CIRCULATOR
L2
T
T 3
2
1
M32025B

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L7224cL7248aL7248cL7248l