General Information
RTAF-SVX001K-EN 13
Free-Cooling System
Glycol Volumes
Note: Volumes listed in table below are in addition to the
fluid volume for standard unit configuration.
Free-Cooling Fluid Management
The direct free cooling option circuit consists of copper,
carbon steel, cast iron, zinc, EPDM rubber, brass, and
Aluminum AA3102, AA3003, AA4045 in addition to other
materials that may be in the building loop connected to the
chiller. The inhibited glycol solution should be selected at
desired concentration to insure adequate inhibitor
content. It is not advised to dilute a stronger concentrate
due to inhibitor dilution. Glycol fluid should be free from
foreign solid particles. A maintenance schedule should be
selected per the glycol manufacturer’s requirements to
insure adequate protection during product usage.
Table 3. Free-cooling system glycol volume
Unit Size Total Glycol Volume
tons gal L
115 59.25 224.27
130 59.25 224.27
150 75.36 285.26
170 75.36 285.26
180 75.36 285.26
200 89.97 340.59
215 89.97 340.59
230 89.97 340.59
250 89.97 340.59
280 201.53 762.89
310 211.97 802.38
350 211.97 802.38
410 247.12 935.44
450 282.27 1068.50
500 282.27 1068.50
NOTICE:
Equipment Damage!
Failure to follow instructions below could result in
equipment damage.
DO NOT USE UNTREATED WATER. Glycol solution
must be utilized with the Direct Free Cooling option.
Glycol percentage should be based on freeze avoidance
requirements. The glycol solution requires an inhibitor
package to be carefully chosen with the aid of qualified
water treatment specialist to abate corrosion in a mixed
metal system.
The building glycol loop should not be vented to
atmosphere. A closed system is required to limit
oxidation potential within the loop.
Make-up water should be avoided.
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