Blue Box KAPPA V SR, Installation, Operating And Maintenance Manual

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Blue Box 30
4.14 OPERATION WITH LOW TEMPERATURE CHILLED WATER AT EVAPORATOR
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.
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.
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
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.
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
TEMPER -40
---
TEMPER -60
TIFOXITE
50 60 63 69 73 ---
FREEZIUM 10 20 25 30 34 37 40 43 45
PEKASOL 50 59 68 75 81 86 90 ---
-30° -35° +0° -5° -10° -15° -40°
% BY WEIGHT
40
50
T -20°C
T -40°C
T -60°C
---
-20° -25°