Daikin EWAD-C - Figure 6 - Freecooling System with 3 Way Valve; Figure 7 - Freecooling System with 2 Way Valve

D-EIMAC01603-18_02EN- 11/27
There are two types of freecooling control system:
Figure 6 - Freecooling system with 3 Way Valve
EWAD640CF-XS/XL ÷ EWADC11CF-XS/XL - EWAD600CF-XR ÷ EWADC10CF-XR
EEWT = Water entering temperature probe
ELWT = Water leaving temperature probe
Figure 7 - Freecooling system with 2 Way Valve
EWADC12CF-XS/XL ÷ EWADC16CF-XS/XL - EWADC11CF-XR ÷ EWADC15CF-XR
EEWT = Water entering temperature probe
ELWT = Water leaving temperature probe
System change over is controlled by embedded unit controller, depending from operating conditions and unit setpoint.
Between winter and summer operation the water side pressure drops are different, consequently the chiller water
flow could be different. Evaluate that the minimum and maximum water flow, between summer and winter operation,
are inside the water flow limits (see product manual).