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5600 332 v1.3
Vitodens 100-W, WB1B Installation & Service
Boiler Connection
(continued)
Troubleshooting
Check outdoor temperature sensor
1.
Disconnect cables from outdoor sensor.
2.
Measure resistance of the outdoor sensor and
compare with resistance / outdoor sensor curve
shown below.
3.
If the value measured differs significantly, replace
the sensor.
In weather-compensated mode (optional), the boiler
water temperature is regulated subject to the outside
temperature.
Frost protection function
Built-in automatic frost protection allows the boiler to be
shut off for an extended period of time while protecting it
against freeze-up. Frost protection is continually active. The
burner is switched ON when the boiler water temperature
reaches 41º F (5º C) and is switched OFF again when the
boiler water temperature reaches at least 59º F (15º C)
[but not more than 68º F (20º C)].
For details on the control, please refer to the
Vitodens 100-W Operating Instructions.
Resistance in K
W
Temperature