TECHNICAL MANUAL
Speedster page 49
Steam/hot water boiler temperature controller
The controller can process 2 sensors, “AL1” is not used in the Speedster (value for °C
and °F: 127.2), “AL2” is connected to the sensor in the steam/hot water boiler.
The factory set value of “AL1” is 127.2 (both °C and °F).
The factory set value of “AL2” is 135 °C (or 275 °F).
The factory set value of “dF” is 0.1 (both °C and °F).
The controller is locked such that you can only change the operating temperature (AL2)
and the filter time constant (dF).
Unlocking the controller is done by pressing P and ˅ simultaneously for about 5
seconds. The display will read “COdE” alternating with the value “001”. With the ˅ key
you change the value into “000”, the controller is now unlocked, press P to confirm and
return to operating temperature.
Locking is done similarly, change the value for “COdE” back to “001” with the ˅ key.
Now you may enter a “deeper” level in the controller, which is essential when you want
to change from degrees Celsius to degrees Fahrenheit or vice versa.
When parameter “dF” is shown in the display, you enter a “deeper” level of the controller
by pressing and holding the P key until the display shows “C111”. Table 3 shows the
scrolling sequence and factory value settings of the individual parameters in degrees
Celsius.
Leaving all buttons untouched for more than approximately 20 seconds will return the
controller to normal operation in which the set value of the boiler temperature is shown
(not alternating).
Table 3 lists the parameter values set for your Speedster with display in degrees Celsius.
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