10/6/10 888-2629-200 B-7
WARNING: Disconnect primary power prior to servicing.
Maxiva ULX COFDM Series
B.3.3 Operating Environment
Ambient air temperatures near the heat exchanger dry cooler should not rise above
45°C for typical installations.
B.3.4 Measuring Specific Gravity
Specific gravity can be measured with a conventional float hydrometer and jar or a
MISCO DFR 200 (or equivalent) digital refractometer to verify the 50/50 mixture. The
hydrometer should be capable of measuring specific gravity in the 1.02 to 1.08 range.
Extract a sample of the coolant being used and cool it to 60
o
F (Note: this is the
temperature to which your hydrometer has been calibrated.)
Read the specific gravity as accurately as possible. With this number the concentration
or per cent of glycol in the solution can be determined. Let us assume the S.G. reads
1.060 on the hydrometer scale.
NOTE:
The specific heat and specific gravity of water is not always equal to 1.0, see
Tables B-2 and B-3 on page B-8.
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