Piping Work; General Notes Before Performing Piping Work - Hisense Hi-Therma Series Service Handbook

4 Complete hanging.
8.2.7.3.4 Position of the service windows
Unscrew the
port of expansion vessel.
2 Unscrew the 2 screws to
port of expansion vessel.
screw

8.2.8 PIPING WORK

Make sure that refrigerant piping installation complies with
the legislation EN378 and local legislation.
8.2.8.1 GENERAL NOTES BEFORE PERFORMING
PIPING WORK
● Prepare locally-supplied copper pipes.
● Select the piping size with the correct thickness and
correct material able to withstand sufficient pressure.
● Select clean copper pipes. Make sure that there is no
dust or moisture inside the pipes. Blow the inside of the
pipes with oxygen free nitrogen to remove any dust and
foreign materials before connecting them.
A system with no moisture or oil contamination will give maximum
performance and life cycle compared to that of a poorly prepared
system. Take particular care to ensure that all copper piping is clean
and dry internally.
● Cap the end of the pipe when pipe is to be inserted
through a wall hole.
● Do not put pipes on the ground directly without a cap or
vinyl tape at the end of the pipe.
● If piping installation is not completed until next day or
over a longer period of time, braze off the ends of the
piping and charge with oxygen free nitrogen through a
Schrader valve type access fitting to prevent moisture
and particle contamination.
● It is advisable to insulate the water pipes, joints and
connections in order to avoid heat loss and dew
condensation on the surface of the pipes or accidental
injures due to excessive heat on piping surfaces.
● Do not use insulation material that contains NH3, as it
can damage copper pipe material and become a source
of future leakage.
● It is recommended to use flexible joints for the water
piping inlet and outlet in order to avoid vibration
transmission.
● Refrigerant circuit and water circuit must be performed
and inspected by a licensed technician and must comply
with all relevant European and national regulations.
● Proper water pipe inspection should be performed after
piping work to assure there is no water leakage in the
water circuit.
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Installation