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CF Series Portable Chiller : Air & Water-Cooled : 5 - 40 Tons
Page: 78
TEMPTEK, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-6352 Fax: 317-881-1277
Email: [email protected]
8.1 OPERATIONS BELOW 48°F FLUID OR 38°F AMBIENT
A.
The chiller is never to be operated below 48°F leaving water temperature without several
precautionary measures. All controls are factory adjusted for 48°F and above operations.
B.
Before readjusting the protective devices, a satisfactory antifreeze solution must be
substituted for the recirculating chilled water. This mixture will consist of inhibited
propylene glycol and water. Do not substitute an inhibited propylene glycol and water
solution with common automotive type antifreeze. The “Cut-In Cut-Out Settings for High
and Log Pressure Switches chart below outlines the glycol percentages at various water
temperatures.
C.
Fluid must be tested with a refractometer to verify proper glycol percentages for freeze
protection. The ratio shall be according to the chart below. Too much glycol can cause
capacity and control problems.
D.
DO NOT USE AUTOMOTIVE TYPE ANTI-FREEZE.
E.
Once a satisfactory antifreeze solution is in place the protective devices may be
adjusted and the control instrument can be unlocked to allow operation below
48°F.
Operating
or Ambient
Temperature
48° - 70°F
25° - 47°F
10° - 24°F
Glycol
0%
30%
40%
Freeze
Point
32°F
10°F
-5°F
Cut Out
Temp
32°F
10°F
-5°F
Cut In
Temp
36°F - 39°F
15°F - 18°F
0°F - 7°F
Cut-Out
58#
33#
20#
Cut-In
63#
38#
25#
Refrigerant
R22
R134A
R407C
R410A
R404A
Air-Cooled
380#
260#
405#
610#
405#
Water-Cooled
360#
260#
360#
550#
360#
R22
Cut-Out
28#
12#
4#
Cut-In
33#
17#
9#
Operating
or Ambient
Temperature
48° - 70°F
25° - 47°F
10° - 24°F
Glycol
0%
30%
40%
Freeze
Point
32°F
10°F
-5°F
Cut Out
Temp
32°F
10°F
-5°F
Cut In
Temp
36°F - 39°F
15°F - 18°F
0°F - 7°F
Cut-Out & Cut-In Settings For High and Low Pressure Switches
Low Pressure Switch
High Pressure Switch (maximum)
R134A
Cut-Out
72#
44#
29#
Cut-In
79#
49#
34#
R404A
Cut-Out
52#
28#
16#
Cut-In
58#
34#
22#
R407C
Cut-Out
102#
63#
43#
Cut-In
111#
72#
52#
R410A
Содержание CF Series
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