R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01
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4) The flexible pipe should be used on water pump side. (The bending angle should not exceed 90°. The
bending part is preferably in the middle of the pipe, the bigger the bending radius, the better it is. Do not
bend the pipe more than 3 times.)
5) Bending the connecting pipe of thin wall.
● Cut out a desired concave at the bending part of the insulating pipe.
● To avoid distortion or damage, please bend the pipe at its biggest radius.
● Use bender to get a pipe with small radius.
Note: Make sure to use insulation material for the copper tube which you purchase by yourself.
18.5 Hydraulic connection
The choice and installation of components is the responsibility of the installer who should follow good
working practice and current legislation. Before connecting the pipes, make sure they do not contain stones,
sand, rust, dross or other foreign bodies which might damage the unit. Construction of a bypass is
recommended to enable the pipes to be washed through without having to disconnect the unit (see drain
valves). The connection piping should be supported in such a way as to avoid it weighing on the unit. It is
recommended that the following devices are installed in the water circuit of the evaporator: A hydraulic
safety valve shall be mounted in water system, which should open constantly.
1. Two pressure gauges with a suitable scale (inlet and outlet).
2. Two vibration damper joints (inlet and outlet).
3. Two gate valves (normal inlet and calibrating in outlet)
4. A flow switch (inlet) or a differential pressure switch (inlet-outlet).
5. Two thermometers (inlet and outlet).
6. An inlet filter as close as possible to the evaporator and positioned to allow easy access for routine
maintenance.
7. An energy-saving water tank.
8. Additional pump.
1) The chillers must be provided with a filling/top-up system connected to the return line and a drain cock in
the lowest part of the installation. Installations containing anti-freeze or covered by specific legislation
must be fitted with hydraulic disconnections.
2) The manufacturer is not liable for obstruction, breakage or noise resulting from the failure to install filters
or vibration dampers. Particular types of water used for filling or topping up must be treated with
appropriate treatment systems. For reference values, see the table.
less than 200 mV/cm (25°C )
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