Installation Guide
ECL Comfort 210 / 310, application A214 / A314
The advanced heating application
A314.7
is very flexible. These
are the basic principles:
Heating / cooling with room temperature and air quality
control
Typically, the heating temperature is adjusted according to your
requirements. The air duct temperature sensor S3 is the most
important sensor. The desired temperature at S3 is set in the ECL
Comfort controller as the 'Desired inlet temperature'.
The recovery circuit, controlled by M2, is considered as the main
circuit, whereas the heating circuit (controlled by M1) and the
cooling circuit (controlled by M3) are the supplementary circuits.
The motorized control valve M1 (controlling the heating
temperature) is opened gradually when the S3 temperature is
lower than the desired S3 temperature and vice versa.
At cooling, the motorized control valve M3 controls the cooling
temperature.
Room temperature:
If the room temperature (S4 or ECA 30) does not equal the desired
room temperature, the desired temperature at S3 can be adjusted.
A too low temperature at S4 will activate the heating circuit (M1),
whereas a too high air duct temperature will activate the cooling
circuit (M3). A "Dead zone" (= number of degrees) can be set
in order to avoid unstable shifts between heating and cooling
operation.
By means of a week schedule (up to 3 ‘Comfort’ periods / day), the
heating circuit can be in ‘Comfort’ or ‘Saving’ mode (two different
temperature values for desired inlet temperature and two different
temperature values for desired room temperature).
The fan F1 is ON / OFF controlled according to the schedule
and heating demand. A damper P2 can be ON / OFF controlled
according to schedule. The circulation pump X3 is ON / OFF
controlled according to heating demand.
Air quality control (CO
2
measured in "ppm"):
The fans V2 and V3 are increased in speed when the ppm value (0 -
10 volt signal measured by S11) exceeds a selectable limit. Speed
relation between V2 and V3 can be set. As an alternative, the S11
signal can express an RH signal (Relative Humidity).
Heat recovery:
In order to utilize heat from the exit air duct, a rotating
heat-exchanger, a cross heat-exchanger or a fluid battery can
be controlled by M2. Based on the outdoor temperature S1, the
entry duct temperature S13 and the exit duct temperature S14 the
recovery efficiency (in %) can be indicated.
Night cooling:
During Saving mode a passive cooling can be arranged, mainly
under the following conditions:
•
room temperature is higher than desired saving room
temperature
•
outdoor temperature is lower than the room temperature
•
schedule 3 is in Comfort mode
Typical A314.7 application:
8
7
H
1
3
4
5
.1
1
D
a
n
fo
s
s
S 1
S
2
A
1
X
4
P
2
ECL 310
+ ECA 32
S
10
M
2
S
13
S 14
A
X
3
M
1
S
5
S
6
S
7
S
10
S
9
F1 / V2
S
11
S 3
S
8
S
8
S
4
S
9
F1 / V3
M
3
X
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:
ECL 310 Electronic controller ECL Comfort 310
ECA 32 Built-in extension module
S1 Outdoor temperature sensor
S2 (Optional) Compensation temperature sensor
S3 Duct temperature sensor
S4 Room temperature sensor*
S5 (Optional) Return temperature sensor
S6 (Optional) Frost temperature sensor
S7 (Optional) Frost thermostat
S8 (Optional) Fire thermostat
S9 Fan monitor
S10 Filter monitor
S11 Air quality (CO
2
) signal (ppm). Alternative: Relative
Humidity signal
S13 Entry duct temperature sensor
S14 Exit duct temperature sensor
F1 Fan (ON / OFF)
P2 Damper (ON / OFF)
X3 Circulation pump, heating (ON / OFF)
X4 Schedule 3
X5 Circulation pump, cooling (ON / OFF)
P7 Recovery circuit pump ON / OFF, (not illustrated)
M1 Motorized control valve, heating (3-point controlled)
M2 Rotating heat-exchanger (0 - 10 volt controlled)
M3 Motorized control valve, cooling (3-point controlled)
V2 Fan speed (0 - 10 volt controlled)
V3 Fan speed (0 - 10 volt controlled)
A1 Alarm
* Alternative: ECA 30
20
DEN-SMT/DK
VI.GU.A2.02
Danfoss District Energy
