8
AIR COOLED WATER CHILLERS
– AXIAL FANS
EKWXA/EKWXBA
11.15 207443 Rev104
6. Expansion devices
The unit is equipped with thermostatic expansion valves with MOP on in the inlet of plate heat exchanger
for functioning in refrigeration mode. The expansion in the outdoor coil, when necessary (functioning in
heating mode), is done through orifice (nozzle).
7. High pressure pressostat
Security pressostat connected to the compressor output (maximum pressure point) manual reset. Shut off
is calibrated to a pressure of 42 bars.
8. Dehydrator filter
Bidirectional type filters are mounted in the liquid line. It has a desiccant solid core that minimizes vibration
and friction during operation, as well as absorbing the excess moisture and filter possible impurities.
9. Liquid container
It is, basically, a tank to hold the difference of refrigerant charge required by the unit to operate between
Cooling/Heating.
10. Check valves
Only in heat pump units to carry out the bypass to the expansion system of the secondary exchanger
block. In cooling mode it carries out the bypass to the coil, in heating mode, to the expansion valves.
11. Sheet structure
The
unit’s structure is weather resistant and it consists of galvanized steel sheet applying an oven-cured
painting process by polymerizing paint providing excellent coating to whole set and, especially, in edges
and corners. The freestanding base is built with high stiffness steel and the rest of the structure is made of
galvanized steel. The design is intended for easy maintenance. The color of the finished set is RAL 1013.
