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L7224A,C; L7248A,C,L OIL ELECTRONIC AQUASTAT
®
CONTROLLERS
68-0281EFS—05 14
Fig. 12. L7224/L7248 multizone system with Outdoor Reset and Domestic Hot Water Modules (indirect tank
applications).
M32024
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.
ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.
1
2
3
C1
B1
ZC
L2
LINE
C2
ZR
L1
B2
T
T
3
2
1
SENSOR
LINE
VOLTAGE
CIRCULATOR
L7224
3
4
3
3
5
BURNER
MOTOR
IGNITOR
VALVE
BURNER
MOTOR
IGNITOR
VALVE
CAD
CELL
JUNCTION
BOX
TO REMOTE
ALARM
CIRCUIT
ENVIRACOM™
TERMINAL
R7184
LIMIT
L1
L2
2
CAD
CELL
T
T
3
2
1
L1
(HOT)
L2
1
LEGEND SCREW TERMINAL 1/4 IN. (6 MM) QUICK CONNECT TERMINAL
SOLDERLESS WIRE CONNECTION
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR.
OPTIONAL DOMESTIC HOT WATER MODULE.
WIRE ONLY THE ENVIRACOM TERMINALS (1, 2, 3) ON OIL PRIMARY
IF CONNECTING TO REMOTE DIAGNOSTICS, OTHERWISE CONNECT
A JUMPER BETWEEN THE TT TERMINALS.
ZONE PANEL TERMINALS MAY HAVE DIFFERENT LABEL. CHECK
PANEL MANUFACTURER SPECIFICATIONS FOR WIRING INSTRUCTIONS.
6
7
8
1 2 3 TS TS
32003971-003
TEMPERATURE
SENSOR
7
50022037-002
DOMESTIC HOT
WATER MODULE
9
MULTI-ZONE
RELAY PANEL
T T
4
5
1 2 3 OT OT
C7089U
OUTDOOR
SENSOR
6
50022037-002
OUTDOOR
RESET MODULE
8
9