Installation; Before You Start - Danfoss ECL Comfort 210 Operating Manual

Operating Guide ECL Comfort 210/296/310, application A237/A337

2.0 Installation

2.1 Before you start

The two applications, A237.1 / A337.1 are almost identical.
However, A337.1 has some extra functions which are described
additionally.
The applications A237.1 / A337.1 are very flexible. These are the
basic principles:
Heating (circuit 1):
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 calculated
in the ECL controller, based on the outdoor temperature (S1) and
the desired room temperature.
The lower the outdoor temperature, the higher the desired flow
temperature.
By means of a week schedule, the heating circuit can be in
'Comfort' or 'Saving' mode. The week schedule can have up to 3
'Comfort' periods / day. A value for the desired room temperature
can be set in each of the modes.
In Saving mode the heating can be reduced or switched off totally.
The motorized control valve M1 is opened gradually when the
flow temperature is lower than the desired flow temperature and
vice versa.
The return temperature S5 can be limited, for example not to be
too high. If so, the desired flow temperature at S3 can be adjusted
(typically to a lower value), thus resulting in a gradual closing of
the motorized control valve. Furthermore, the return temperature
limitation can be dependent on the outdoor temperature.
Typically, the lower the outdoor temperature, the higher the
accepted return temperature. In boiler-based heating supply the
return temperature should not be too low (same adjustment
procedure as above).
If the measured room temperature (directly connected temperature
sensor ESM-10 (S2) or Remote control unit ECA 30 / 31) does not
equal the desired room temperature, the desired flow temperature
can be adjusted.
The circulation pump P1 is ON at heat demand or at frost
protection. The circulation pump P1 can be switched OFF when
heating the DHW. If the system has a changeover valve (P2 / M2)
between the heating and DHW circuit, the circulation pump P1
is ON when heating the DHW.
The heating can be switched OFF when the outdoor temperature is
higher than a selectable value.
A connected flow or energy meter based on pulses (S7) can limit
the flow or energy to a set maximum value. Furthermore, the
limitation can be in relation to the outdoor temperature.
Typically, the lower the outdoor temperature, the higher the
accepted flow / power.
The frost protection mode maintains a selectable flow temperature
value, for example 10 °C.
An alarm can be activated if the actual flow temperature differs
from the desired flow temperature.
6 | © Danfoss | 2017.05
Typical A237.1 / A337.1 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:
ECL 210/296/ Electronic controller ECL Comfort 210, 296 or 310
310
S1 Outdoor temperature sensor
Room temperature sensor
S2
S3
Flow temperature sensor, circuit 1
S5 Return temperature sensor, circuit 1
S6 DHW tank temperature sensor, upper
S7 Flow / energy meter (pulse signal)
S8 DHW tank temperature sensor, lower
P1 Circulation pump, heating, circuit 1
P2 DHW pump, circuit 2
P3
DHW circulation pump, circuit 2
M1 Motorized control valve (3-point controlled).
Alternative: Thermo actuator (Danfoss type ABV)
A1
Alarm
VI.LG.R3.02