9. Schaltgerät - Kessel

6. Initial operation6.4.1 Operating the switch unit (up to model year 12/09)6.4.1 "Automatic" operating modela) Single systemThe basic function is carried out when the operating modeswitch is set to "auto" and there is no indication of a malfunction(see chapter 9, Switch unit). As the (soiled water) levelrises in the tank, the level switch "on" closes. After the "on"switched has closed, the switch-on delay time begins (seesection 5.7, Configuration of switch unit), after which thepump is switched on. The level in the tank decreases throughthe pump operation so that the "on" level switch opens again.After the "on" switched has opened, the run-on time begins(see section 5.7, Configuration of switch unit), after which thepump is switched off.If the current pump running time exceeds the configuredvalue of the maximum running time limit, the pump is switchedoff. At the same time, a malfunction message is issuedby the red LED "run time" lighting up permanently and via the"malfunction" relay output. The malfunction message (LEDand relay) remain stored until the "alarm reset" key is actuated,and the pump can only be restarted once this has takenplace.b) Twin systemThe basic function is carried out when both operating modeswitches are set to "auto" and there is no indication of a malfunction(see chapter 9, Switch unit).Alternating operationAs the (soiled water) level rises in the tank, the level switch"on 1" closes. After the "on 1" switched has closed, theswitch-on delay time begins (see section 5.7, Configurationof switch unit), after which one pump is switched on. Thelevel in the tank decreases through the pump operation sothat the "on 1" level switch opens again. After the "on 1" switchedhas opened, the run-on time begins (see section 5.7,Configuration of switch unit), after which this pump is switchedoff. Next time the "on 1" level is reached, the otherpump is switched on.When the maximum running time limit has been exceeded,the malfunction message and switch-off of the respectivepump take place as with the single system. The respectivepump can only return to operation when the "alarm reset" keyhas been actuated.In as far as one pump leaves "auto" control (on account ofthe running time limit being exceeded, a malfunction, throughrespective position of the operating mode switch), the remainingsecond pump is operated analogue to the "auto"control of a single system, independently of the other pump.6.4.2 Operating mode "0" (up to model year 12/09)When the operating mode switch is in the "0" position, the(respective) pump is switched off, independently of all inputsignals. The display elements remain ready for operation.6.4.3 Operating mode "manual" (up to model year 12/09)In the "manual" operating mode the (respective) pump is orremains switched on, independently of the existing waterlevel in the tank, until this operating mode is switched offagain.CAUTION:Running the pump(s) without water will lead to reducedcooling and increased wear of the pump motor.Excessive dry running of the pump(s) longer than 5minutes can thus lead to irreparable damage to thepump. Such damage is not covered by the warranty.6.5 Functional testThe different functions of the overall system depending onthe water level in the tank must be checked in a one-off testusing the corresponding water filling levels in the tank. Thetank must be filled via the connected inlet pipe.Parallel operationAs the (soiled water) level rises in the tank, the level switch"on 1" closes. After the "on 1" switched has closed, theswitch-on delay time begins (see section 5.7, Configurationof switch unit), after which one pump is switched on. If thewater level continues to rise, the second pump is switchedon (after the delay time) in addition if the "on 2" level is exceeded.This parallel pump operation continues until the "on1" level switch opens again and the run-on time has expired.63