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Idiomas disponibles
L7224U OIL AND ELECTRIC BOILER ELECTRONIC AQUASTAT
TROUBLESHOOTING
When attempting to diagnose system performance,
reference to the LED display can help to identify
specific areas not working properly. The LED display
will scroll Err, followed by a digit (1-8). Refer to Table 9
for a description of each error and suggested actions
and Table 10 for a troubleshooting guide.
L1
(HOT)
SENSOR
ZR
L1
LINE
L2
VOLTAGE
CIRCULATOR
C2
B2
C1
LINE
VOLTAGE
B1
OIL BURNER
RELAY
ZC
1
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR.
W8735S1000 WIRED OUTDOOR RESET MODULE SHOWN.
Fig. 8. L7224U single zone connections.
69-1720EFS—11
W8735Y1000 OR
W8735S1000
1 2 3 OT OT
L2
C7089U1006
OUTDOOR
SENSOR
T
T 3
2
1
®
CONTROLLER
W8735Y1000 OR
W8735S1000
1 2 3 OT OT
C7089U
OUTDOOR
SENSOR
1
SENSOR
LINE
VOLTAGE
CIRCULATOR
LINE
VOLTAGE
OIL BURNER
RELAY
1
OPTIONAL OUTDOOR RESET MODULE AND OUTDOOR SENSOR. W8735S1000 WIRED
OUTDOOR RESET MODULE SHOWN.
Fig. 9. L7224U single heat zone with indirect water
tank and circulators. Optional outdoor reset
M32022B
8
LINE VOLTAGE INDIRECT
TANK AQUASTAT
L1
(HOT)
L1
(HOT)
L2
1
T
T 3
ZR
L1
L2
C2
B2
C1
B1
ZC
module.
INDIRECT
TANK CIRCULATOR
L2
2
1
M34962
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