Daikin EWAD C-SS Serie Bedienungsanleitung Seite 18

Freecooling units have additional coils used to pre-cool the fluid coming from the building and increase the overall efficiency by
unloading the compressors until their completely stop if the environments conditions allow it. The water flow can be diverted to the
additional coils in case the outside ambient temperature drops below the return water temperature by three way va lve (or two
single way valves. It depends from chiller size).
Freecooling operation can be enable by QFC switch installed in the control section of the electrical panel . Once the Freecoo ling
function is enabled, the unit controller manages automatically the operation of the water valves. The system controls, also, the
operation of fans maximizing the freecooling effect.
The water system MUST be filled with the proper percentage of Water and Glycol.
It is resposability of end user to ensure to appropriate amount of Water/Glycol percentage.
Damage of Freecooling coils caused by freezing is not covered by the warranty.
Install field-provided flow switches with water pump interlock to sense the system water flow.
To prevent damage to the freecooling coils and evaporator tubes, install a strainer in the unit water inlet piping.
Strainer must have maximum 0,5 mm mesh.
There are two types of freecooling control system:
EWAD640CF-XS/XL ÷ EWADC11CF-XS/XL - EWAD600CF-XR ÷ EWADC10CF-XR
EEWT = Water entering temperature probe
ELWT = Water leaving temperature probe
Freecooling Unit Version
ATTENTION
ATTENTION
ATTENTION
Freecooling system with 3 Way Valve
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