INSTALLATION AND OPERATION MANUAL
Contents
1. INSTALLATION AND OPERATION MANUAL Electronic pressure switch with protection against dry running ZD 15 Please read these manuals carefully before installation and application of the device Both the installer and the end user must respect the manuals in detail also concerning the valid local regulations rules and laws The device complies with the valid regulations the EU The manufacturer assumes no liability for damages resulting from an incorrect application or an application under conditions different from those indicated on the type plate or within this manual Cut off the power supply before opening the cover if you want to remove the device or the switching cabinet RANGE OF APPLICATION AND SERVICES Device for automatic control of electronic pumps in water units e Replaces the traditional system with expansion tank id Switches the pump on or off depending on opening or closing of the extraction points e Keeps the pressure constant during the extraction e Switches the pump off is case of water deficiency and ensures a protection against dry running e Prevents hydraulic shock effects e Requires no maintenance TECHNICAL DATA Voltage single phase 230 V Protection class IP 55 Permissible voltage fluctuations 10 Device ZD 15 Frequency 50 60 Hz Maximum operating pressure 8 bar 0 8 MPa Current rating 16 6 A Maximum operating temperature 65 Maximum output 1 1 kW 1 5 HP External thread G1 AG Non adjustable standa2. should be connected to the pump using a flexible hose fig 1 B Before commissioning the device make sure the pump is properly bled POWER CONNECTION fig 4 The device may be connected to mains by qualified staff only and in accordance with the valid legal requirements An all phase switch with a terminal distance of minimum 3 mm must always be connected head of the device One phase pumps 230 V with a motor output of up to 1 1 kW 1 5 HP fig 4 A may be connected directly to the device while one phase pumps with an output of more than 1 1 kW 1 5 HP fig 4 B must connected via a contactor to the device Check the mains voltage at the data indicated on the type plate of the pump motor e Connect the electrical power as indicated in the graphs of fig 4 e Use cables of type HOS or HO7 with a cross section of 3x1 mm2 e Make sure the device is connected to the earthing system COMMISSIONING AND OPERATION fig 3 The green lamp power on on the front side of the device shows that voltage is connected while the yellow lamp pump on shows that the pump in operation If the device will be connected to the mains the green and the yellow lamp light up The latter shows that the pump is started fig 3 A it rests in operation for some seconds in order that the unit may be pressured If this time should not suffice push and hold the red button restart and wait until water leaves from an opened extraction point After clos
3. ing the extraction point the device deactivated the pump and rests in stand by mode in doing so the green lamp remains switched on and the device is ready to execute all further command and control processes completely independent fig 3 B When opening an extraction point the device activates the pump it rests in operation until the extraction point is closed again fig 3 A After closing the extraction point the device recovers the maximum pressure in the unit switches the pump off and changes again to stand by mode fig 3 B If there is a water deficiency during the intake process the device switches the pump fig 3 C off in order to protect it against dry running As soon as the disturbance which caused the blockage is removed it is sufficient to push the red restart button in order to retake the normal operation In case of a temporary disturbance of the power supply the device starts again automatically as soon as the power is reconnected DISTURBANCES CHIEF CAUSE e The pump does not start Faulty power supply e The pump does not switch on The water column is too high e The pump operates with disruptions Water removal of the unit is lower than the minimum flow e The pump does not switch off Loss of water in the unit is higher than the minimum flow e The pump is blocked Intake difficulties A defective switching cabinet may be replaced without removal of the device The switching cabinet is replaceable and can be del
4. ivered on request Further disturbances and causes different to the above mentioned may be prevented or removed by carefully checking the characteristics of the device the pump and the unit considering the instructions in the section on installation FIGURES N P min 3 5 bar SS ee EV Attention roar fa The pressure switch may only moot CE goreesl be assembled in vertical position arrow points upwards 230V 50 60 Hz Connection via a contactor to one phase 230 V motors with a power input of more than 1 1 kW Direct connection to one phase 230 V motors with a maximum power input of 1 1 kW
5. rd start up pressure between min 1 5 bar and max 2 bar INSTALLATION fig 1 and 2 Attention Before installation ensure that the technical characteristics of the device the pump and the unit are compatible The pressure of then pump must amount to minimum 3 5 bar 0 35 MPa and maximum 8 bar 0 8 MPa The water column between the device and the highest extraction point must not exceed 15 m If the pressure of the pump does not reach the above mentioned values the pump blocks or does not switch off The pump starts but does not switch on or it does not switch off if the height of the water column exceeds the above mentioned values In order to eliminate this disturbance install the device at a higher position The device may be directly installed onto the pump or between the pump and the first extraction point fig 1 Install a pressure reducer between the pump and the device if the inlet pressure at the device exceeds 8 bar 0 8 MPa No extraction point must be installed between the pump and the device fig 1 The device must be installed in such a manner that the arrows indicating the flow direction point upwards fig 1 A It is recommended to install a ball valve and a manometer at the outlet of the device in order to check the functionality of the pump and the device when they are separated from the unit using the valve and in order to determine the actual discharge height of the pump using the manometer The output of the device
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