Fema Regelgeräte
Honeywell AG
Böblinger Straße 17
D-71101 Schönaich
Setting the Switching Point
The interrelation between air speed and resistance change is not linear. In the lower range (low rates of flow) the change of resistance is very large. In the upper range, the change of resistance at identical changes in the rate of flow becomes increasingly smaller. When setting the switching point, it must first be determined what change is to be monitored, since some settings result in certain disadvantages. The following requirements must be taken into consideration:
Low change in the rate of flow in the high flow speed range: the switching point must be chosen very close to the measuring value of the normal flow, since the change of measuring values is very small when the rate of flow changes. Since the temperature compensation exhibits a certain amount of delay in comparison to the actual change of temperature, such a setting of the switching point is possible only with slow changes of temperature.
Low change in the rate of flow in the low flow speed range: the switching point may be selected at a greater distance from the measuring value of the normal rate of flow, since the changes of the measuring values are larger when the rate of flow changes. A change in temperature has no effect on the switching behavior.
Large change in the rate of flow: in most cases like this a simple yes/no statement is desired (e.g. ventilator running or ventilator stopped). Therefore, a larger safety margin may be selected, so that neither temperature changes nor turbulence have any influence on the switching behavior.
Commissioning of KSL.. |
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Start-up bypass |
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Jumper set |
= start-up bypass active for approx. 60 sec. Yellow LED „Time“ is on |
Jumper not set |
= start-up bypass inactive |
Connection and commissioning must be performed by properly authorized and qualified personnel!
When commissioning and adjusting the devices, the following procedure is recommended:
•Install and connect the flow controller in accordance with installation instructions and conditions.
•Set jumper for start-up bypass, if required.
•Set trimmer „Sensitivity“ to minimum sensitivity (left limit stop).
•Connect mains voltage. The green LED lights up. If the jumper has been set, the start-up bypass procedure will be executed (approx. 60 sec.).
•Set nominal rate of flow.
•Slowly turn trimmer „Sensitivity“ clockwise until the yellow LED lights up and the signal output switches. In order to avoid erroneous switching at low changes of flow, turn the potentiometer slightly past the switching point.
•To check the function of the flow controller, reduce or stop the flow.
•The yellow LED will go off (output relay at RLSW4R is released).
The device is now set to function.
Trouble shooting
Problem |
Possible Cause |
Corrective Action |
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KSL... does not function at all |
None or wrong mains voltage |
Check mains voltage and connection |
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connected |
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KSL... does not detect flow |
Sensor not installed correctly |
Check installation conditions |
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KSL... exhibits changed tripping behavior |
Sensor heavily contaminated by the |
Carefully clean sensor with water |
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medium |
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KSL... switches at rapid temperature increase |
Temperature gradient is outside of |
Turn potentiometer „Sensitivity“ slightly |
of the medium |
technical specifications |
further clockwise. |
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Check temperature gradient of the |
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system. |
Should you have any further questions, please contact
TELEFON: 0 70 31 / 637-02 y FAX: 0 70 31 / 637-850 y INTERNET: http://www.honeywell.de/fema
BANKEN: Deutsche Bank AG Böblingen 05 / 89 200 (BLZ 600 700 70) y Volksbank Schönbuch eG 784 001 (BLZ 603 628 04) VORSTAND: Horst Bellwied, Regine Blickwede, Joachim Frosch, Wolfgang Fuchs, Horst Wild, Michael Löffler (stellv.)
VORSITZENDER DES AUFSICHTSRATES: Arnold Günther y SITZ: Offenbach am Main, Amtsgericht Offenbach am Main 5 HRB 6225
22.08.2001
Fema Regelgeräte
Honeywell AG
Böblinger Straße 17
D-71101 Schönaich
Airflow Controller
Operating Instructions for Airflow Controller
KSL..
TELEFON: 0 70 31 / 637-02 y FAX: 0 70 31 / 637-850 y INTERNET: http://www.honeywell.de/fema
BANKEN: Deutsche Bank AG Böblingen 05 / 89 200 (BLZ 600 700 70) y Volksbank Schönbuch eG 784 001 (BLZ 603 628 04) VORSTAND: Horst Bellwied, Regine Blickwede, Joachim Frosch, Wolfgang Fuchs, Horst Wild, Michael Löffler (stellv.)
VORSITZENDER DES AUFSICHTSRATES: Arnold Günther y SITZ: Offenbach am Main, Amtsgericht Offenbach am Main 5 HRB 6225
22.08.2001
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