Stulz C7000 - Ecocool

121 © STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR A/C UNITS
6.3 Ecocool
NOTICE
The Ecocool control can not be used for the GE and GES unit versions and can nei-
ther be combined with DFC control nor with DFC² control.
NOTICE
The return air sensor must be installed out of the A/C unit in the room.
The Ecocool control enables a "Free cooling" with outside air, which is directed by a louver system. Three lou-
vers are necessary, which will be controlled in parallel by a single analog output.
1. Fresh air louver for the inlet of fresh outside air
2. Circulating air louver for the circulation of the room air
3. Exhaust air louver for the outlet of warm room air
The fresh air and exhaust air louver are operated in parallel, the circulating air louver is operated in a reverse
sense to these louvers. The setting is done by determinating the sense of rotation at the louver actuators.
The Ecocool control works with room air control the same as with supply air control. In both cases the control
requires a room air sensor to determine the temperature difference between the room air and the outside air.
Exhaust air
Circulating air
Fresh air
Exhaust air
louver
Circulating air louver
Fresh air louver
Thermical load
A/C unit
(Downflow)
Installation example
Room air
sensor
External
temp. sensor