Chapter Ⅱ Installation（5. Installation and Heat Insulation for Pipelines of Water System）
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circulating flow reaches its closed flow, it is used to output closed loop circuit; when water flow is
smaller than a certain flow, water flow switch will send out a break-off signal to stop the units and
thus protect compressor, water pump and other important components.
1）Water flow switch of water heater should be installed in the circulating inlet water pipe; it
should not be installed in the hot water outlet pipe; installation size of water flow switch is G1.
2）Usually water flow switch contains detachable paddles that are 45mm, 65mm, 75mm or
85mm‟s long and 16mm‟s wide. The paddle can be trimmed conditionally during installation.
Please make sure the rear part forms an arc that matches the pipe and the bottom of the paddle
should be 10%-20% above the pipe central line, thus avoiding collision between the paddle and
the inner surface of pipes as well as other objects inside.
water flow switch
other valve
fluid direction
3）Please make sure that the flow direction is consistent with the marks on the water flow
switch box cover;
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