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Application sheet
ECL Card
C66
DH-SMT VA.7C.E2.02 © Danfoss 10/2005 1
The return temperature measured by S4 can be
limited during heating.
Reduced flow or room temperature can be
programmed in desired periods.
Hot water circuit
The motorised valve M2 controls the flow (hot
water) temperature measured by S5.
The return temperature measured by S6 can be
limited in the primary hot water circuit.
The hot water is circulated by pump P3.
The return temperature in the hot water circuit
can be limited by S6.
Reduced hot water temperature can be
programmed for desired periods.
Function
Applications
Heating circuit I
The motorised valve M1 controls the flow
temperature which is measured by S3.
The flow temperature (S3) in the heating
circuit is controlled in relation to the outdoor
temperature measured by S1.
The room temperature is measured by S2 and
can be controlled by ESM-10, the remote control
ECA 61, or room panel ECA 60.
1. Indirectly connected heating circuit and PI-regulated hot-water service circuit
2 VA.7C.E2.02 © Danfoss 10/2005 DH-SMT
Application sheet ECL Card C66
Applications
Ordering
2. Directly connected heating circuit and indirectly connected PI-regulated hot-water service circuit
Type Description Code no.
C66 ECL Comfort Card - English 087B4757
C66 ECL Comfort Card - German 087B4780
C66 ECL Comfort Card - Danish 087B4753
C66 ECL Comfort Card - Swedish 087B4754
C66 ECL Comfort Card - Finnish 087B4755
C66 ECL Comfort Card - Polish 087B4781
C66 ECL Comfort Card - Estonian 087B4793
C66 ECL Comfort Card - Latvian 087B4794
C66 ECL Comfort Card - Lithuanian 087B4795
C66 ECL Comfort Card - Russian 087B4806
C66 ECL Comfort Card - Rumanian 087B4803
C66 ECL Comfort Card - Slovenian 087B4829
C66 ECL Comfort Card - Bulgarian 087B4847
C66 ECL Comfort Card - Hungarian 087B4850
C66 ECL Comfort Card - Czech 087B4851
DH-SMT VA.7C.E2.02 © Danfoss 10/2005 3
Application sheet ECL Card C66
Terminal Description Max. load
1 L Voltage supply 230 V a.c.
2 N Voltage supply 230 V a.c.
3 M1 Gear motor - open/circuit I 0.2 A 230 V a.c.
4 M1 Gear motor - close/circuit I
alt.: ABV thermo actuator
0.2 A 230 V a.c.
5 230 V a.c. supply for
M1/circuit I
6 M2 Gear motor - open/circuit II 0.2 A 230 V a.c.
7 M2 Gear motor - close/circuit II 0.2 A 230 V a.c.
8 230 V a.c. supply for
M2/circuit II
9 P1 Circulation pump for
heating circuit I
4(2)A 230 V a.c.
10 230 V a.c. supply for
pump relay R1
13 P3 Circulation pump for
hot water circuit II
4(2)A 230 V a.c.
14 230 V a.c. supply for
pump relay R3
Outputs
Inputs
Terminal Description Max. load
1 L Voltage supply 24 V a.c.
2 N Voltage supply 24 V a.c.
3 M1 Gear motor - open/circuit I 1.0 A 24 V a.c.
4 M1 Gear motor - close/circuit I
alt.: ABV thermo actuator
1.0 A 24 V a.c.
5 24 V a.c. supply for
M1/circuit I
6 M2 Gear motor - open/circuit II 1.0 A 24 V a.c.
7 M2 Gear motor - close/circuit II 1.0 A 24 V a.c.
8 24 V a.c. supply for
M2/circuit II
9 K1 Relay for circulation pump
for heating circuit I
4(2) A 24 V a.c.
10 24 V a.c. supply for pump
relay R1
13 K3 Relay for circulation pump
for hot water circuit II
4(2) A 24 V a.c.
14 24 V a.c. supply for pump
relay R3
Terminal Description Type
(recommended)
15 and 16 System device bus/ ECA 60 / 61
17 and 16 Outdoor temp. sensor S1 ESM-10
18 and 16 Room temp. sensor,
circuit I S2
ESM-10
19 and 16 Flow temp. sensor,
circuit I S3
ESMU/ESM-11/
ESMC
20 and 16 Return temp. sensor,
circuit I S4
ESMU/ESM-11/
ESMC
21 and 16 Hot water flow sensor,
circuit II S5
ESMU/ESM-11/
ESMC
22 and 16 Hot water return temp.
sensor, circuit II S6
ESMU/ESM-11/
ESMC
4 VA.7C.E2.02 © Danfoss 10/2005 DH-SMT
Application sheet ECL Card C66
Safety thermostat
If a safety thermostat is applied, it must wired according to the
drawing.
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