Bird Technologies 8650B Series - Manual (Page 21)

Installation
9
Figure 6 Freezing Point of Ethylene Glycol /Water Mixture °C
Coolant
Before shipment, the Moduload is drained of coolant to avoid possible damage
from freezing in transit. The system must be refilled with coolant before it can
be put into operation. The unit operates with 17 quarts (16.1 liters) of coolant.
The load’s electrical and thermal performance can become impaired by impu-
rities or additives in the coolant. Impurities which accumulate as scale on the
resistor surface are especially damaging.
The coolant must be either; distilled water or a mixture of distilled water and
ethylene glycol. Distilled water is the primary coolant for the Bird 8650. Eth-
ylene glycol should be added to prevent bacterial growth and freezing.
Note: 10% – 35% ethylene glycol is recommended. Using at least
10% will prevent bacteria growth and 35% will protect against freezing
to –20°C. Table 5 and Table 6 show the coolant’s freezing point for a
given percentage of ethylene glycol in the mix.
To ensure proper mixing add the water first, then the ethylene glycol
The following example shows the weights to make a 65% distilled water to 35%
ethylene glycol mixture in 5 and 55 gallon quantities:
-60
-50
-40
-30
-20
-10
0
Te
m
per
at
ur
e,
D
egr
ee
s
C
el
si
u
s
10 20 30 40 50 60
% Ethylene Glycol
Specifications for ethylene glycol
having: specific gravity 1.125 @
32°F; specific heat .575 @ 68°F
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 the supplied 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)