Operating instructions for the domestic waterworks

When commissioning a domestic waterworks you should always follow the manufacturer's operating instructions. Not always this is still available. Therefore we offer below a general operating manual for the domestic waterworks.

A general user manual can not fulfill all requirements

Please note that a general operating manual, a specific operating manual for a specific domestic water boiler model of a manufacturer can never be completely replaced. Here completely different and partly also individual circumstances play a big role:

  • Length of the delivery line
  • Type of water reservoir (cistern, wells, at the well of its validity)
  • possibly existing filter and filter type (cartridge or sand filter)
  • used pump (even this can be different for the same pressure vessel)
  • Size of the pressure vessel
  • technical structure of the pressure vessel (air or gas such as nitrogen in the air chamber, etc.)

Construction of the domestic water plant

First, the length of the delivery line must be taken into account. From the pump, a total of up to 40 and 50 m high can be pumped. In front of the pump, however, only in the range that reaches from the atmospheric pressure to the pressure of 0 (under which begins the vacuum.) This pressure can be given as a water column of about 10 M. The best pumps achieve an efficiency of about 80 percent, so one Water column of 8 m.

Operation and use of various pumps

For a suction pump or jet pump this must be taken into account, because it comes only after the delivery line. In contrast, a submersible pump is used in the water reservoir (well shaft or cistern) in front of the delivery line. Once these questions have been clarified, the pump can be installed.

The pressure vessel from the house waterworks

Now, above all, the decisive pressures and pressure values ​​in the pressure vessel must be checked or adjusted. On the one hand, this is the admission pressure in the air chamber, but also the switch-on pressure and the cut-off pressure for the pump. The switch-off pressure is usually indicated as "pressure difference" (to switch-on pressure). Here we show you how to adjust these two pressures at the domestic waterworks.

Form and working pressures

However, the admission pressure in the air chamber must be taken into account. If it is too low, the membrane (also rubber bubble, water bubble, water bag) can expand too much and tear. How to set the form at the waterworks, we show you here. However, there are different "air systems". Some work with a gas such as nitrogen; many pressure vessels are filled on the air side with conventional air.

The filling of the air chamber

So you either need a nitrogen bottle, a small compressor or a hand pump. Please note that it is forbidden by law to connect a pressure bottle to the pressure vessel during operation! We will show you how to set this form at the waterworks if you follow this link.

The connection sizes

After all this work has been done, you can put the system into operation. Now the leak tests are still done. Incidentally, before purchasing the domestic waterworks, you still have to worry about the pipe connection sizes. These are conventionally between 1 and 1.5 inches. Under certain circumstances, you may also need a pressure reducer to the already laid distribution pipe (after the domestic waterworks).

Maintenance tasks in the user manual

While the house water works are now doing its job, you still have to wait. On the one hand, these are leak tests, which are to be carried out once a month. Two to three times a year you must check the form and also the switching pressures. In addition, depending on the circumstances, the filter must be cleaned at regular intervals from the domestic waterworks.

Tips & Tricks

Please note, however, that we can not replace a specific manufacturer's manual. In addition the product variety and also the use of the variety of the pump types is simply too big. Not to forget the peculiarities of the individual water supply (type of water reservoir, length of the delivery and distribution lines, degree of contamination of the pumped medium).

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