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7.2 New adjustment
Adjusting the temperature limit starting from
an unknown setting:
Note
To adjust the limit properly, the ambient tem-
perature must be at least 15 K above the
temperature limit to be adjusted. Wait at
least 90 minutes after operation.
1. Unscrew the cap (3.1).
2. Undo the lock nut (3.2).
3. Turn the limit adjuster (3) counterclock-
wise until no resistance can no longer be
felt. Turn the adjuster one half turn more
(regulator fully closed).
4. Calculate the temperature difference be-
tween prevailing ambient temperature
and required temperature to be adjusted
(T
).
limit
5. Divide the calculated temperature differ-
ence by 11 to determine how many times
the limit screw must be turned to adjust
the temperature limit (see Fig. 7-1).
6. Turn the limit adjuster (3) clockwise until
resistance can be felt. Turn the limit ad-
juster clockwise by the calculated num-
ber of turns.
EB 2090 EN
For example:
Ambient temperature:
Required limit:
ΔT = (29 °C) – (–15 °C) =
Turns = 44 °C/11 =
7. Secure limit adjuster (3) with the lock nut
(3.2).
8. Screw cap (3.1) back on.
9. If necessary, secure the setting by insert-
ing a wire for lead sealing through the
holes in the cap and body.
7.3 Adjustment based on limit
marking
In a special version, the limit adjuster has a
marking ring indicating a temperature differ-
ence of approx. 10 K (10 °C) from one end
to the other.
Operation
+29 °C
–15 °C
44 °C
4
7-3
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