Samsung AM CNB C AA Series Technical Data Book page 52

13. Installation
11) Water scale may occur on the plate type heat exchanger depending on the water quality and the type of plate
heat exchanger so regular chemical cleaning is necessary. When installing water pipes, install a heat source
water shut-off valve and also install the flushing pipe with a ball valves (for chemical cleaning) on the pipe
installed between the shut-off valve and the outdoor unit.
12) Before trial operation, connect the cleaning pipes installed on inlet and outlet as shown in above illustration.
Then, take appropriate measures (such as blind flange etc) to stop the circulation water from entering the
outdoor unit plate type heat exchanger, and use circulating pump to remove foreign substance within the
water pipes and clean the strainer. If you do not clean the strainer, foreign substances may accumulates on
plate type heat exchanger and may break the heat exchanger or cause problem to it.
13) Make sure that water quality within the water pipe meets the standard of cooling water quality for
refrigerating and air conditioning equipment.
− Water containing high level of foreign substances can cause water heat exchanger and pipe corrosion or
creation of water scale. (Use the appropriate heat source water according to the below table)
− If the make-up water is provided from any other source than local water supply, make sure to check the
quality of water.
− Strainer (which needs to be purchased separately) must be installed to the 'Water IN' pipes of the water
pipe. If sand, dust or rust debris enters to water system, it may cause corrosion on metallic materials or
blockage of the water heat exchanger and damage the heat exchanger.
− If the existing thermal storage tank or pipes are used, foreign substances may block the plate type heat
exchanger of the DVM Hydro unit / Hydro unit HT so, water quality and foreign substances must be
managed.
14) Check that the total water volume in the installation, excluding the internal water volume of DVM Hydro unit /
Hydro unit HT, is 20 L (5.3 gal) minimum.