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5712 717 v1.0
Vitotronic 100, KW10B Installation, Start-up and Service
Altering Settings
Fixed High Limit
CAUTION
If adjusting the fixed high limit to 212° F (100° C),
DO NOT set adjustable high limit higher than 167° F
(75° C).
The FHL deactivates the burner control circuit if abnormally
high temperatures occur.
If tripped, it may be reset by pushing in the pin, labelled
with a “E” (using a ballpoint pen). If a “click” can be
heard, the limit was tripped.
Adjustment to 212° F (100° C)
1. Turn indicator screw at rear of FHL to 212° F
(100° C) position using a flat-head screwdriver
(readjustment to previous position is not possible).
2. Please complete Protocol on page 34.
Note: the default setting of the fixed high limit (FHL) is
230° F (110° C).
Changing the Setting of the Fixed High Limit Safety Cut-out
Adjustment to 100° C for side scales
Turn the screw until the indicator points to 100° C.
g Safety feature: if capillary is not liquid tight (leaks),
switch deactivates
Due to the expansion characteristics of the liquid
contained in the capillary, the switch also deactivates
(opens) at 14° F (-10° C) thereby shutting down the
heating system.
g Sets a maximum limit for boiler water temperature
where after the switch deactivates and locks
(factory setting 230° F (110° C)
g Adjustable to 212° F (100° C) via slot screw on rear
side (readjustment to previous position is not possible)
WARNING
If adjusting to 212° F (100° C), AHL must not be set
higher than 167° F (75° C).
IMPORTANT
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