DEHOUST AQF 570/5 Operating And Installation Manual Download Page 15

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DEHOUST GMBH – GUTENBERGSTR. 5-7 – D-69181 LEIMEN – www.dehoust.com

7.2.1. Slide ring seal/bearing of immersion pressure pump

An exchange of the slide ring seal is recommended after 10,000 hours of operation or after 10 years whichever is sooner. In case
of early wear and tear, the slide ring seal should also be replaced.

7.2.2. Removal of the immersion pressure pump

The immersion pressure pump is connected in the inside of the tank through an electrical plug connection. When it is necessary

to remove the immersion pressure pump, the electrical plug connection can be disconnected and the immersion pressure pump

can be removed. The pressure hose must be removed by disconnecting the hose clip from the hose socket.

Electrical plug connector - PIN assignment of immersion pressure pump: 1; 3; PE

Summary of Contents for AQF 570/5

Page 1: ...Break tank system AQF For protection of drinking water from process water in hazard class 5 in accordance with DIN EN 1717 Operating and installation guide Current as of October 2015 ...

Page 2: ... 2 Legal warranty obligation excerpt 3 3 Description 4 3 1 Functional description 4 3 2 Technical specifications 4 3 3 Scope of delivery 5 3 4 Structure 6 3 5 Intended use 6 3 6 Unauthorised use 7 4 Transport 7 5 Installation 7 5 1 Assembly area 7 5 2 Immersion pressure pump in the storage tank 7 5 3 Connection to water pipes 8 5 4 Emergency overflow connection 9 5 5 Emergency overflow vent type A...

Page 3: ... the present manual Information attached directly to the system must be followed and must be kept in legible condition This applies for example for Safety information Labels for connections Type plate Before installation and commissioning the manual must be read by the operator and by the assigned technician operator and must be available at all times at the usage location of the break tank system...

Page 4: ...onnel is regularly trained in all relevant matters concerning occupational safety and environmental protection and has understood the manual and in particular has read and understood the safety instructions contained in it safety and warning signs on the break tank system are not removed and all remain legible any other hazards that arise from the specific working conditions at the operation site ...

Page 5: ...s and size the most important operational data and the serial number To uphold any warranty claims in the event of damage the authorised dealer must be immediately notified with the installation site and serial number of the machine 2 1 Warranty and liability The general delivery conditions and terms of sale of DEHOUST shall apply Any warranty and liability claims for personal or material damage a...

Page 6: ...istered by the automatic switch and the immersion pressure pump is switched on until the switch off pressure is reached again The immersion pressure pump will continue running for approx 10 seconds after reaching the switch off pressure To reduce the switching frequency of the pressure booster the installation of a membrane pressure expansion vessel of at least 50 litres in volume is recommended i...

Page 7: ...break tank system consisting of Storage tank 570 litre type Aquaform Emergency overflow connection DN 70 on storage tank Type AB drinking water feed according to DIN EN 1717 Mechanical float valve for regulation of fill level quantity Immersion pressure pump HDPE pressure pipe with quick close Connection line of break tank system incl 2 m connecting cable User guide ...

Page 8: ...ibed in the documentation of the relevant version Never operate the break tank system without pumping medium The minimum volumetric flow cannot exceed 2 l min 0 12 m A lower volumetric flow of the consumers will result in unusually frequent switching on and off of the immersion pump In this case an appropriately dimensioned expansion vessel must additionally be placed in the pressure line Do not r...

Page 9: ... to DEHOUST in writing 5 Assembly 5 1 Assembly area The break tank system must be set up in a frost proof dry and well ventilated room on ground level and on a level surface The load bearing capacity must be equal at a minimum to the total weight of the break tank system in filled operating condition see 3 2 The room temperature must not exceed the maximum permissible temperature see 3 2 to minimi...

Page 10: ...tank system and seal Connect the connection line in de energised state There should not be any forces applied to the connection sockets and system Install a pressure reducer in front of the system if necessary to ensure that no more than 5 bar of primary pressure is fed from the drinking water network We recommend installing a shut off valve a detachable screw and an external fine water filter The...

Page 11: ...ff valve and a detachable screw Figure 5 Connection of the process water line 5 4 Emergency overflow connection Connect the emergency overflow connection DN 70 see 3 2 of the break tank system with the channel interface or a suitable pump system For this purpose insert a DN 70 HT pipe of approx 2 3 cm into the provided DN 70 green lip seal and install the pipe according to the intended connection ...

Page 12: ... Connection of the overflow connection 5 5 Emergency overflow vent type AB If a backflow occurs due to a drain blockage defect of the pumping station extending into the process water storage tank of the break tank system the water is drained through the tank s side emergency overflow vent into the installation room This free overflow is required to protect the mains water back up line in accordanc...

Page 13: ...ed is connected to the drinking water network Process water connection is connected to the process water line System is correctly connected electrically 6 1 Fill container and start immersion pressure pump 1 Open the shut off valve on the drinking water connection and the tank will automatically fill with drinking water 2 As soon as the vessel if filled the mechanical float valve switches the drin...

Page 14: ... seal Time interval half yearly 7 1 3 Mechanical float valve Check the mechanical float valves for functioning Open the process water consumer and wait until the fill level in the break tank system has fallen so that the ball valve is open Close the process water consumer again and wait until the ball valve closes again Time interval half yearly 7 1 4 Functioning of immersion pressure pump Check p...

Page 15: ... should also be replaced 7 2 2 Removal of the immersion pressure pump The immersion pressure pump is connected in the inside of the tank through an electrical plug connection When it is necessary to remove the immersion pressure pump the electrical plug connection can be disconnected and the immersion pressure pump can be removed The pressure hose must be removed by disconnecting the hose clip fro...

Page 16: ...closed Open line Float switch switches Check float switch Service Not correct reposition if necessary replace Dry run immersion pressure Drinking water feed volume Pressure reducer or shut off valve pump Not sufficient check and adjust Service Dry run protection is automatically reset after 3 min After 4 unsuccessful starts reset time interval is increased to 1 hour After 4 more unsuccessful start...

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