Danfoss ECL Comfort 210 Installation Manual page 9

Installation Guide
DHW (circuit 2):
By means of a week schedule (up to 3 Comfort periods / day), the
DHW circuit can be in 'Comfort' or 'Saving' mode (two different
temperature values for desired DHW temperature).
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 charging
temperature at S4.
The charging temperature is typically 5-10 degrees higher than
the desired DHW temperature.
The S3 temperature is controlled gradually to fulfil the temperature
demand at S4. A max. temperature at S3 can be set. The charging
pump (P4) is switched ON when the flow temperature (S3) is as
requested by the charging temperature at S4.
DHW storage tank with 1 temperature sensor:
When the measured DHW temperature (S6) gets higher than the
desired DHW temperature, the DHW pump (P2) is switched OFF.
The motorized control valve (M1) will maintain the desired flow
temperature in the heating circuit. After a post-run time, the
charging pump (P4) is switched OFF.
DHW storage 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) is
switched OFF. The motorized control valve (M1) will maintain the
desired flow temperature in the heating circuit. After a post-run
time, the charging pump (P4) is switched OFF.
If the installation has a changeover valve (P2 / M2), also called
priority-valve, between the heating and the DHW circuits, the
changeover valve is activated at DHW heating demand. The
circulation pump (P1) is ON when heating the DHW.
Parallel mode in two-pump applications:
If the charging temperature has a value close to the desired flow
temperature in the heating circuit, the circulation pump (P1) in the
heating circuit will not be switched OFF during DHW heating.
The return temperature (S5), when the DHW heating is active, can
be limited to a fixed value.
An anti-bacteria function is available for activation on selected
days of the week.
The DHW circulation pump (P3) has a week schedule for up to 3
ON-periods per day.
Danfoss District Energy
ECL Comfort 210 / 310, application A237 / A337
A237.2 / A337.2 example a:
M1
A237.2 / A337.2 example b:
S 1
S 3
P 1
M1
S 5
VI.LG.R1.02
P 1
P 2
P 4
ECL 210 / (310)
(R6)
S 4
P 4
P2 / M2*
S 6
S 8
P 3
S 2
S 6
P 3
S 8
DEN-SMT/DK 9