Daikin EWYQ130DAYN [360/524] Free cooling on ambient temperature

Daikin EWYQ230DAYN [360/524] Free cooling on ambient temperature
Functional Control for a Standalone Unit ESIE06-05
2–134 Part 2 – Functional Description
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3.10.1 Free cooling on Ambient Temperature
Indirect and direct
free cooling
Free cooling on ambient :
When free cooling becomes active, turn off compressors and close DI to e.g. energize 3 way valve
(case 1) or pump (case 2) to dry cooler.
When deactivation of free cooling, there is a lead timer to startup the compressors (as to give 3
way valve time to de-energize and go to chiller).
When Free cooling is active, it is possible to select if the pump contact must be closed or open
(case 1 : closed / case 2 : open).
Functional
description
Depending on the settings and according to the function below free cooling is requested or not.
Free cooling on ambient:
When free cooling is active, turn off compressors.
When deactivation of free cooling, there is a lead timer to startup the compressors.
When free cooling is active, it is possible to select if the pump contact must be closed or open.
CASE 1 CASE 2
Chiller ChillerDry Cooler Dry Cooler

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