5.1 The diameter of the water meter should be selected according to the water consumption to be close to the usual flow rate.

5.2 Rated working conditions: a) Flow range Q1～Q3; b) Ambient temperature: 5°C～55°C; c) Water temperature: cold water meter is less than or equal to 30°C, hot water meter is less than or equal to 90°C; d) Ambient humidity is 40°C Time is (0 ~ 100) RH; e) water pressure: 0.03 ~ 1.0MPa.

5.3 The installation of the water meter shall be based on the indication on the dial of the water meter or on the cover. The “H” mark is installed horizontally, the “V” mark is installed vertically, the water meter dial is facing upward, the case arrow and the pipe flow direction Consistently, the upstream of the water meter should be equipped with a control valve to facilitate the replacement and maintenance of the water meter.

5.4 Water meter installation location should avoid exposure, freezing, pollution and flooding. In high-cold areas, it should be avoided to be installed outdoors. It is necessary to install outdoor water meters. Sun protection and anti-freezing measures should be taken to avoid exposure to water and cracks, which may affect normal use.

5.5 In order for the water meter to work normally for a long time, the water meter should always be filled with water. If air is likely to enter the water meter, install a bleed valve upstream of the water meter.

5.6 The water meter should be prevented from being damaged by the impact or vibration of the environment around the installation site. The water meter should also be protected from excessive stress caused by the pipe and fittings. If necessary, the water meter should be installed on the base or bracket.

5.7 Extreme water temperature and extreme temperature should be prevented from damaging the water meter and preventing the external environment from corroding the water meter.

5.8 Measures should be taken to prevent unfavorable hydraulic conditions (cavitation, surge, water hammer).

5.9 The upper and lower water pipes shall be properly fixed to ensure that no part will be displaced by the thrust of the water when the water meter is removed or the connection is disconnected.

5.10 If the water meter is installed at the water inlet of the boiler, a check valve should be installed at the water outlet end of the water meter, and the water meter should be kept away from the check valve to prevent the heat conduction of the metal pipeline and the return of the hot water to the hot water meter.

5.11 Before the water meter is installed, the debris in the pipeline must be removed. When installing the water meter, pay attention to the connection length of the water meter. When the distance between the two ends of the pipeline exceeds the connection length of the water meter, the pipeline spacing should be corrected to meet the connection length of the water meter. Otherwise, the excessive installation will force the screw connection or joint or connection of the water meter. If the nut and the connecting flange are broken and damaged, the water meter will not be installed if the spacing is too small. If the pipelines at both ends of the water meter are not on the same axis, the pipeline should be corrected on the same axis by other means to meet the installation requirements of the water meter.

5.12 During the long-term use of water meters, if there are debris, rust and other deposits in the pipeline, it will inevitably block the water filter network and affect the water supply and accurate metering. If the above situation should be obtained and solved by the local water company, it shall not be dismantled and disassembled. .

5.13 If the water meter is not used, if the pointer rotates slightly, it is caused by the water pressure in the pipeline is not stable enough or other reasons. It is recommended to close the control valve upstream of the water meter when the water meter is not in use or install the check valve at the inlet end of the water meter. .

5.14 The installation of the water meter or its accessories is not carried out in strict accordance with the installation precautions, and all losses shall be borne by the installer.

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