EN2R-9005 0406R3-NE
16
PERFORMANCE
Fixed switch differential
On controls and recycling limits a fixed differential of:
4 ± 1.5°C, 8 ± 3°C or
12 ± 3°C is supllied as a standard.
Optional are:
7 ± 2.7°F,
14 ± 5.4°F
15 ± 5.4°F
Adjustable switch differential
On controllers and recycling limiters an adjustable differential
of:
4 ± 1.5°C ... 10 ± 3°C or
7 ± 2.7°F ... 18 ± 5.4°F can be supllied.
Manual or tool reset switch differential
On the thermal cut-out versions (manual or tool reset) of the
panel mounted, the single direct mounted and the dual direct
mounted Aquastats the maximum reset differential might be
30°C
NOTE:
The differential (thermal) is dependant on the rate of
change of the temperature in the heating system.
The given differential datas are valid for a rate of 1°C
per minute.
Ambient temperature error
Example:
An ambient error ratio of 1 : 6 means that an ambient
change of 6°C will cause a setpoint shift of the Aquastat of
1°C.
Time constant
•
With well
τ
≤
30 s for panel mounted, single direct mounted, dual
direct mounted and triple direct mounted Aquastats.
•
Without well
τ
≤
4 s
•
With sensor assy (Surface mounted Aquastat)
τ
±
50 s
Setpoint accuracy
+
0/
-
8°C for thermal cut-outs
Ratio of ambient error
Max. setting
Min. setting
With capilliary lenth of 1000 mm
1 : 5.5
1 : 8.5
With capilliary lenth of 50 mm
1 : 12
1 : 25
