Danfoss ECL Comfort 210 Installation Manual page 5

Installation Guide
The application A230 is very flexible. These are the basic principles:
Cooling (application A230.2):
Typically, the flow temperature is adjusted according to your
requirements. The flow temperature sensor S3 is the most
important sensor. The desired flow temperature at S3 is set in the
ECL controller. Furthermore, the outdoor temperature (S1) can
influence the desired flow temperature. The higher the outdoor
temperature, the lower the desired flow temperature.
By means of a week schedule, the cooling circuit can be in 'Comfort'
or 'Saving' mode (two temperature levels).
The motorized control valve M1 is opened gradually when the
flow temperature is higher than the desired flow temperature and
vice versa.
The return temperature S5 to the cooling supply should not be too
low. If so, the desired flow temperature can be adjusted (typically to
a higher value), thus resulting in a gradual closing of the motorized
control valve.
If the measured room temperature does not equal the desired
room temperature, the desired flow temperatures can be adjusted.
If the measured room temperature does not equal the desired
room temperature, the desired flow temperatures can be adjusted.
The circulation pump, P1, is ON at cooling demand.
An external signal for the desired flow temperature can be applied
as a 0–10 volt signal to the terminals for S8.
Danfoss District Energy
ECL Comfort 210, application A230
Typical A230.2 application:
The shown diagram is a fundamental and simplified example and does
not contain all components that are necessary in a system.
All named components are connected to the ECL Comfort controller.
List of components:
S1
Outdoor temperature sensor
S2 Room temperature sensor / ECA 30
S3
Flow temperature sensor, cooling
S4
Supply flow temperature sensor (read-out only)
S5 Return temperature sensor
S6 Return temperature sensor (read-out only)
(S8) (External voltage (0–10 V) for external setting of desired flow
temperature)
P1 Circulation pump, cooling
M1 Motorized control valve, cooling
The A230.2 application can utilize a connected flow / heat meter to
limit the flow / power.
The controller is pre-programmed with factory settings that are shown
in the relevant chapters of this guide.
VI.LG.H1.02 DEN-SMT/DK 5