Midea Aqua Tempo Super II Series Technical & Service Manual page 51

Aqua Tempo Super II Series DC Inverter Air-cooled chiller unit (50Hz)
15.2.2 Connection drawing of pipeline system
unit
unit
15.2.3 Water quality
※Water quality control
When industrial water is used as chilled water, little furring may occur; however, well water or river water,
used as chilled water, may cause much sediment, such as furring, sand, and so on. Therefore, well water or
river water must be filtered and softened in softening water equipment before flowing into chilled water
system. If sand and clay settle in the evaporator, circulation of chilled water may be blocked, and thus
leading to freezing accidents; if hardness of chilled water is too high, furring may occur easily, and the
devices may be corroded. Therefore, the quality of chilled water should be analyzed before being used, such
as PH value, conductivity, concentration of chloride ion, concentration of sulfide ion, and so on.
※ Applicable standard of water quality for the unit
PH Total Conductivity
value hardness
<50ppm
7～ <20μV/cm(25℃)
8.5
Differential pressure by-pass valve
Auxiliary electric heater
Sulfide Chloride Ammonia
ion ion ion
No <50ppm No
49
Expansion tank
Water replenishing
Dirt discharge valve
Drain valve
Sulfate Silicon
ion
<50ppm <30ppm
MCAC-ATSM-201704
Terminal
Two-way valve
Three-way valve
Iron Sodium ion
content
<0.3ppm No
requirement
Calcium
ion
<50ppm