KAPPA V ECHOS AC IOM.pdf - Industrial Air

6.14 OPERATION WITH LOW TEMPERATURE CHILLED WATER AT EVAPORATOR
With temperatures lower than 6 °C, the hydraulic circuit should be filled with a suitable water and antifreeze
solution. In such cases the service thermostat and the freeze protection thermostat must be reset:
These calibrations are normally factory set.
Units from the normal production range are not designed to operate
with chilled water temperatures lower than 6 °C, at the evaporator
outlet. To operate outside this limit the unit may require structural
modifications. If this is necessary contact Bluebox.
The ethylene glycol percentage must be selected in relation to the required chilled water temperature.
See table 1.
TABLE 1 - FREEZING POINT FOR WATER-ANTIFREEZE MIXTURES
LIQUID OUTLET TEMPERATURE
OR MINIMUM AMBIENT TEMPERATURE (°C)
FREEZING POINT (°C) -5° -10° -15° -20° -25° -30° -35° -40° -45°
ANTIFREEZE
ETHYLENE GLYCOL 6 22 30 36 41 46 50 53 56
PROPYLENE GLYCOL 15 25 33 39 44 48 51 54 57
METHANOL 8 14 20 26 30 34 38 41 45
CALCIUM CHLORIDE 9 14 18 21 24 26 27 28 30
TEMPER -20
T -20°C
---
TEMPER -40 T -40°C
---
TEMPER -60
+0° -5° -10° -15° -20° -25°
-30° -35° -40°
TIFOXITE 40
50 60 63 69 73 ---
FREEZIUM 10 20 25 30 34 37 40 43 45
PEKASOL 50 50 59 68 75 81 86 90 ---
If ambient temperatures lower than the freezing point of water can
be expected, antifreeze mixtures in the above indicated percentage
must be utilized.
In the case of ST versions with a glycol content greater than 30% pumps
with special seals must be specified at the time of the order.
Blue Box 33
% BY WEIGHT
T -60°C