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CG-SVX039C-GB
Optional Free-Cooling
Glycol Free-cooling
Free-Cooling Bypass Valve Settings
Position 1: 0% - Closed – Free-cooling
Position 2: 10%
Position 3: 20%
…..
Position 10: 100% - Fully Open – No Free-cooling
Open position: Water flow is directed to evaporator and
there will not be any free-cooling.
Closed position: All the water flow is directed to free-
cooling exchanger or de coupling bottle. In Free-cooling
mode water flow will see highest pressure drop.
Slightly open: 0% to 30% will direct the some portion of
water through free-cooling exchanger and the remaining
to evaporator.
Refer the settings table for more details.
Table 18 – Direct Free-Cooling Setting
DIRECT FC 80 90 100 110 130 140 150 165 180 190
% Open 0% 0% 0% 0% 20% 30% 30% 30% 40% 40%
Position 1/2* 1/2 1/2 1/2 3 4 4 4 5 5
Table 19 – Glycol Free Free-Cooling Setting
DIRECT FC 80 90 100 110 130 140 150 165 180 190
% Open 0% 0% 0% 0% 20% 20% 20% 30% 30% 30%
Position 1/2 1/2 1/2 1/2 3 3 4 4 4 4
Note for maintenance: Check glycol circuit pressure before free-cooling operation season starts. Run glycol pump
few minutes in manual override during monthly maintenance operation when free-cooling is continuously OFF to
avoid possible glycol crystallization. Pump Override function is located in TD7 via Button Settings -> Manual Control
Settings -> Free-cooling Pump Override.
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