Bird Technologies 8640B Series - Manual (Page 18)

Installation
7
Coolant
Distilled water is the primary coolant for the Bird 8640. Ethylene
glycol should be added to prevent bacterial growth and freezing; 10%
to 35% ethylene glycol is recommended. Using at least 10% will
prevent bacterial growth and at least 35% will protect against
freezing to – 20°C.
NOTE: When using both ethylene glycol and distilled water, add
the water first, then the ethylene glycol, to ensure proper mixing.
Figure 3 on page 8 shows the coolant’s freezing point for a given
percentage of ethylene glycol in the mix. The following example shows
the weights to make a 65% distilled water to 35% ethylene glycol
mixture in 5 and 55 gallon quantities.
WARNING
Ethylene glycol is toxic. Do not take internally.
Avoid contact with eyes, skin, and clothing. Avoid breathing vapor.
Wash thoroughly after handling.
CAUTION
Use only distilled water or ethylene glycol as coolant. Do not use
tap water, automotive antifreeze, sealants, or leak stopping
material. Use of these materials will damage the instrument and
void all warranties.
5 Gal. (18.9 L) 55 Gal. (208.2 L)
Distilled Water 28.0 lb (12.7 kg) 310 lb (140.6 kg)
Ethylene Glycol 15.2 lb (6.9 kg) 167 lb (75.7 kg)