Honeywell L7224U - L7224 U Multizone System with Circulator Connections and Enviracom Thermostat

L7224U OIL ELECTRONIC AQUASTAT
®
CONTROLLER
69-1720—03 12
Fig. 11. L7224U multizone system with circulator connections and EnviraCOM™ thermostat.
M29686
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
OPTIONAL FEATURE ON SELECT MODELS.
REFER TO DEVICE LABEL FOR WIRE COLOR CODE.
1
2
3
C1
B1
ZC
L2
LINE
C2
ZR
L1
B2
T
T
3
3
3
2
2
2
1
1
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
TH9421C
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
VALVE IS OPTIONAL ON SPECIFIED MODELS.
ENVIRACOM™ TERMINAL 3 IS ALSO THE FIRST THERMOSTAT TERMINAL.
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR.
4
5
6
1 2 3 OT OT
C7089U
OUTDOOR
SENSOR
6
50022037-002
OUTDOOR
RESET MODULE