(4).Selection circulation pipeline.
Circulation pipeline of inverter heat pump can not be smaller than the inlet and outlet pipeline,
circulation pipe should use the same diameter as inlet and outlet pipes.
(5).Connection of pipeline
◆Don't let the dust and other debris into piping system.
◆Doing the plumbing work after fixing the unit firmly.
◆A removable filter （40～60mesh）must be installed at the water inlet and please regular clean the
valve depend on your local water quality.
◆Install a drain valve in the lowest point of the pipe, for convenient cleaning, Ensure smooth access
level, Can not alternately up and down, for discharge the air and draining the water in the pipe out.
◆Install the union valve at the water inlet/outlet, for convenient maintaining. Should fix the valve on
water pipe of the unit. Rotating the water pipe, water connecting can’t withstand rotation torsion
directly.
◆Outlet and inlet water pipes should do thermal insulation well, the distance of outlet and inlet need
to apart, for first time to use, should add the appropriate amount of antifreeze and anti corrosive into
the warming water pipes, the input water pipe and water tank can do water replenishment according
to the actual situation.
◆Do not shut off the power in winter. If do not use for a long time, should drain off the water in the
unit and water pipes, to prevent heat exchanger or water pipe freeze and crack.
◆Select pipe material, can choose stainless steel, copper, aluminum hot water pipes, hot water PPR
pipes, etc., with pipes in national health and safety standards, heat-resistant, rust-proof, not easy to
scale.
◆Reasonable pipe layout, to minimize bending and reduce the pressure loss of the water system.
◆After the circulating water system connected, must do pipeline connection rigidity and add water
pressure inspection, and sewage, to ensure the system clean. Past the inspection,no leakage, then pack
insulation for pipeline and valves.
◆Metal pipe must use with more than 50mm thick glass fiber or high density, fire-retardant insulation
sponge. (PPR hot water pipes can be used 30mm thickness of glass fiber or high density fire-retardant
sponge rubber insulation.)
◆Must install thermometer and water pressure gauge on Inlet and outlet water pipes,to inspect
during operation.
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