Danfoss ECL Comfort 310 Installation Manual page 7

Installation Guide
A 367.2:
If the measured DHW temperature (S6) is lower than the desired
DHW temperature, the heating circulation pump (P1) is switched
OFF and the DHW pump (P2) is switched ON. The motorized control
valve (M1) is controlled in order to maintain the DHW heating
temperature at S3.
The DHW heating temperature is determined by the desired DHW
charging temperature at S9. When the DHW heating temperature
is reached, (or max. 3 minutes after DHW heating demand), the
DHW charging pump P4 is switched ON.
The DHW charging temperature is typically 5 - 10 degrees higher
than the desired DHW temperature.
If the DHW charging temperature at S9 can not be reached, the
ECL controller gradually increases the desired DHW heating
temperature at S3 in order to obtain the charging temperature.
A max. value can be set.
DHW tank with 1 temperature sensor:
When the measured DHW temperature (S6) gets higher than the
desired DHW temperature, the DHW pump (P2) and DHW charging
pump (P4) are switched OFF. Post-run times can be set. The
motorized control valve (M1) will hereafter maintain the desired
flow temperature in the heating circuit.
DHW tank with 2 temperature sensors:
When the measured DHW temperature (S6) gets higher than the
desired DHW temperature and the lower temperature (at S8) gets
higher than the cut-out temperature, the DHW pump (P2) and
DHW charging pump (P4) are switched OFF. Post-run times can be
set. The motorized control valve (M1) will hereafter maintain the
desired flow temperature in the heating circuit.
Danfoss District Energy
ECL Comfort 310, application A367
Typical A367.2 application:
S 1
M2
S 2
S 3
M1
S 5
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 Return temperature sensor, circuit 2
S3 Flow temperature sensor, circuit 1
S4 Flow temperature sensor, circuit 2
S5 Return temperature sensor, circuit 1
S6
DHW tank temperature sensor, upper
S7 Room temperature sensor, circuit 1 / 2
S8 DHW tank temperature sensor, lower
S9 DHW charging temperature sensor, circuit 3
P1 Circulation pump, heating, circuit 1
P2 DHW heating pump, circuit 3
P3
DHW circulation pump, circuit 3
P4
DHW charging pump, circuit 3
P5 Circulation pump, heating, circuit 2
M1 Motorized control valve, circuit 1 and DHW
M2 Motorized control valve, circuit 2
(M3) (Changeover valve, circuit 1, heating / DHW)
R6
Relay output, alarm
VI.LG.R1.02
ECL 310
R6
S 4
P 5
P 1
S 9
S 6
S 8
P 2 P 4
(S7)
(S7)
P 3
DEN-SMT/DK 7