Installation Guide
ECL Comfort 310, application A376
2.0 Installation
2.1 Before you start
The applications,
A376.1, A376.2, A376.3 and A376.9
are almost
identical. However, some applications have extra functions which
are described separately.
The applications 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).
The lower the outdoor temperature, the higher the desired flow
temperature. By means of a week schedule (up to 3 ‘Comfort’
periods / day), the heating circuit 1 can be in ‘Comfort’ or
‘Saving’ mode (two different temperature values for desired room
temperature).
The motorized control valve M2 is opened gradually when the
flow temperature is lower than the desired flow temperature and
vice versa.
The return temperature (S5) to the district heating supply should
not be too high. If so, the desired flow temperature can be adjusted
(typically to a lower value), thus resulting in a gradual closing of the
motorized control valve.
In boiler-based heating supply the return temperature should not
be too low (same adjustment procedure as above).
Furthermore, the return temperature limitation can depend
on the outdoor temperature. Typically, the lower the outdoor
temperature, the higher the accepted return temperature.
The circulation pump (P2) is ON at heat demand or at frost
protection.
The heating can be switched OFF when the outdoor temperature is
higher than a selectable value.
A376.1, A376.2 and A376.3:
If the measured room temperature does not equal the desired
room temperature, the desired flow temperature can be adjusted.
Typical A376 application:
S
1
D
a
n
fo
s
s
8
7
H
2
0
9
7
.1
0
ECL 310
R6
S 3
S 5
P
2
M2
S 2
S 7
S 9
S10
P
3
M3
M1
P 1
S 4
S 6
①
②
③
The shown diagram is a fundamental and simplified example and
does not contain all components that are necessary in a system. The
numbers in circles refer to the circuit numbers.
All named components are connected to the ECL Comfort controller.
List of components:
A376 in general, sensors
S1
Outdoor temperature sensor
S2
Room temperature sensor, circuit 1 (A376.2: Room
temperature sensor, circuits 1 and 2)
S3
Flow temperature sensor, circuit 1
S4
DHW temperature sensor, circuit 3
S5
Return temperature sensor, circuit 1
S6
Return temperature sensor, circuit 3
S7
Room temperature sensor, circuit 2 / (A376.2: Supply
temperature sensor) / (A376.9: Pressure signal input)
(S8)
(A376.2: Flow switch) / (A376.9: Alarm input)
S9
Flow temperature sensor, circuit 2
S10
Return temperature sensor, circuit 2
(S11)
(A376.9: Supply flow temperature sensor)
(S12)
(A376.9: Supply return temperature sensor)
(S13)
(A376.9: Return temperature sensor, circuit 2)
(S14)
(A376.9: Pressure signal input)
(S15)
(A376.9: Alarm input)
(S16)
(A376.9: Alarm input)
4
DEN-SMT/DK
VI.GU.B1.02
Danfoss District Energy
