Danfoss ECL Comfort 210 Operating Manual page 8

Operating Guide ECL Comfort 210/296/310, application A237/A337
DHW (circuit 2):
By means of a week schedule, the DHW circuit can be in 'Comfort'
or 'Saving' mode. The week schedule can have up to 3 'Comfort'
periods / day. A value for the desired DHW temperature can be
set in each of the modes.
DHW heating start, DHW tank with 1 or 2 temperature sensors
When the measured DHW temperature S6 gets lower than the start
temperature, the heating circulation pump P1 is switched OFF and
the DHW heating pump P2 is switched ON.
The motorized control valve M1 is controlled in order to maintain
the heating temperature at S3.
A delayed start of the DHW heating pump can be arranged. In this
case, S3 must be placed in the heat-exchanger.
The DHW heating temperature is determined by the desired DHW
temperature at S6 plus the set charging difference. The charging
temperature is typically 5 - 10 degrees higher than the desired
DHW temperature.
The return temperature S5, when the DHW heating / charging is
active, can be limited to a set value.
Charging stop, DHW tank with 1 temperature sensor
When the measured DHW temperature S6 gets higher than the
charging-stop temperature, the DHW heating pump P2 is switched
OFF. A post-run time can be set.
Charging stop, DHW tank with 2 temperature sensors
When the measured DHW temperature S6 gets 2 K higher than the
heating-start temperature AND the lower tank temperature S8 gets
higher than the heating-stop temperature, the DHW heating pump
P2 is switched OFF. A post-run time can be set.
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.
An anti-bacteria function is available for activation on selected
days of the week.
The DHW circuit can be connected primarily and the valve 'P2 /
M2' operates as ON / OFF valve.
The DHW circulation pump (P3) has a week schedule for up to 3
ON-periods / day.
The DHW circulation pump P3 can be switched OFF during DHW
heating / charging.
8 | © Danfoss | 2017.05
A237.1 / A337.1 example a:
A237.1 / A337.1 example b:
A237.1 / A337.1 example c:
A237.1 / A337.1 example d:
VI.LG.R3.02