installation of an apartment meter set without a cabinet step by step

We are still preparing products.

But you can look at other categories.

Installation of an apartment metering assembly without a cabinet is a key step in modernizing older apartment systems or in the construction of new single-family homes, where accurate heat consumption measurement is required. This type of assembly allows installation in free space in the boiler room or technical room and requires strict adherence to hydraulic principles for the proper functioning of the entire heating system.

Site preparation and verification of the hydraulic diagram

Before actual installation, it is essential to precisely determine the location of the assembly so that it is accessible for maintenance and calibration, while respecting minimum distances from the boiler and distributors. We recommend drawing a simple sketch of the piping before starting the work, clearly marking the hot water supply from the boiler and the return supply to the radiators to avoid incorrect connections.

Most errors occur precisely because the installer underestimates the need for equal lengths of the supply and return piping before and after the measuring assembly, which leads to unstable pressure in the system. When selecting components, always verify that the chosen assembly, for example an apartment metering assembly without a cabinet with Kv 2.75, meets the requirements of your heat pump or boiler for maximum flow.

Step-by-step mounting and securing of components

The assembly is mounted on a solid structural base using special brackets, which are often part of the packaging, while it is necessary to ensure that all connections are perfectly horizontal and vertical. It is crucial to correctly install the ball valves and heat meter so that the direction of water flow is in accordance with the arrows on the valve body and on the measuring element.

First, mount the support rails on the wall according to the pre-marked points and check their level with a spirit level.
Mount individual segments of the assembly on the support rails, starting from the supply side from the boiler to the return supply.
Tighten all connecting nuts thoroughly using the appropriate wrenches, without over-tightening to avoid damaging the seals.
Install the heat meter and flow meter in a vertical position if required by the manufacturer, or in a horizontal position according to the instructions.

Hydraulic connection and flow setting

After physically mounting the assembly, the piping connection follows, which must be carried out with consideration for the minimum straight sections before and after the measuring element to ensure accurate measurement. If you are using a non-mixed system, as is the case with the boiler module HEAT BLOC K31 without a pump, it is critical to correctly set the balancing valve on the return pipe to achieve optimal flow.

When setting the flow, it is advisable to use a pressure gauge to check the pressure difference between the supply and return supply, which should correspond to the design values given by the designer. In the case where you also have a circulation pump in the system, such as a boiler module with DAB EVOSTA3 60/180, you must set its performance so that it does not exceed the maximum allowable pressure in the measuring assembly.

Sealing and pressure test of the system

Before putting the system into operation, it is absolutely essential to perform a pressure test, which verifies the tightness of all connections and the tightness of the measuring element against high pressure. The pressure test is usually carried out with water under 1.5 times the operating pressure for at least 15 minutes, during which there must be no pressure drop or leakage of liquid.

Check the condition of the seals on all ball valves and on the heat meter body before closing the cover.
During the pressure test, monitor the pressure gauge readings on the supply and return supply to identify any leaks.
If a leak is detected, immediately shut off the water supply and tighten the connection, or replace the damaged seal.
Only after the successful completion of the pressure test can you open the main valves and start the circulation pump.

Commissioning process and calibration

The actual commissioning requires gradual opening of the valves and subsequent checking of the temperature and pressure in the entire system to prevent hydraulic shock. Calibration of the measuring element is performed automatically on first power-up if the device is equipped with a digital display, or manually according to the manufacturer's instructions for analog models.

After starting the circulation pump, it is necessary to bleed all radiators and check for air blockages in the system that could affect the accuracy of the measurement. If you used a boiler set with a pressure relief valve, make sure the valve responds correctly to pressure changes and does not leak water into the sewer system.

Hydraulic balancing and pressure difference

For accurate operation of the measuring set, it is critical to maintain a stable pressure difference between the supply and return pipe, which ensures that the heat meter receives water at a constant speed regardless of the load on other sections of the system.

Frequently asked questions

How often should a residential measuring set be calibrated?

Calibration is carried out once every two years or according to current legislation as part of the regular inspection of heat meters, which is performed by authorized personnel.

Can I install the set myself without professional authorization?

Physical installation is possible for regular owners, but pressure testing and commissioning should be carried out by qualified plumbers to maintain the warranty.

What should I do if the heat meter is not displaying correctly?

Check the correct connection of the temperature sensors on the supply and return lines and make sure they are not damaged or improperly attached to the pipes.

Proper installation of a residential measuring set without a cabinet is the foundation for the long-term and trouble-free operation of the entire heating system, which also allows you to accurately manage your energy costs. Adhering to the steps mentioned above and using high-quality components from our range guarantees that your investment will pay off in the form of lower heating bills and minimized malfunctions.

Do you have a question about this topic?

Not sure or dealing with a specific situation in your household? Write to us - we are happy to help.