Connecting And Placing The Temperature Sensors - Danfoss L66 User Manual

14a
Connecting and placing the
temperature sensors
Connecting the temperature sensors and the bus
Terminal Description
15 and 16 System device bus*,
connections for room
panel** / remote control** /
(relay module)
17 and 16 S1 Outdoor temperature
sensor
18 and 16 S2 R
alarm
19 and 16 S3 Flow temperature sensor,
circuit I
20 and 16 S4 Return temperature sensor,
circuit I
21 and 16 S5 DHW flow temperature
sensor, circuit II
22 and 16 S6 DHW return temperature
sensor, circuit II
* The system device bus / room panel / remote control is only active
when the outdoor temperature sensor is connected.
** Either room panel or remote control
Establish the jumper from 16 to common terminal.
Wire cross section for sensor connections:
Min. 0.4 mm
Total cable length: Max. 125 m (all sensors incl. system device
bus)
Cable lengths of more than 125 m may cause noise sensibility
(EMC).
Terminals 16 and 18
External circuit for alarm contact:
R and R are external alarm relay contacts, i.e. pressure controlled
x y
switches.. The contacts should be gold-plated. The resistance in
the contacts must be lower than 10 ohm (operating conditions
5 V and 1.7 mA).
Terminal 16
Type (recomm.)
ECA 60 / 62
ECA 61 / 63
ESMT
ESM-11 / ESMC /
ESMU
ESM-11 / ESMC /
ESMU
ESM-11 / ESMC /
ESMU
ESM-11 / ESMC /
ESMU
2
-> Alarm input circuit I
Terminal 18
-> Alarm input circuit II
It is important that the sensors are mounted in the correct
position in your system.
The temperature sensor mentioned below are sensors used
for the ECL Comfort 200 and 300 series which not all will be
needed for your application!
Outdoor temperature sensor (ESMT)
The outdoor sensor should be mounted on that side of the
building where it is less likely to be exposed to direct
sunshine. It should not be placed close to doors, windows or
air outlets.
Flow temperature sensor (ESMU, ESM-11 or ESMC)
Place the sensor max. 15 cm from the mixing point. In
systems with heat exchanger, Danfoss recommends that the
ESMU-type to be inserted into the exchanger flow outlet.
Make sure that the surface of the pipe is clean and even
where the sensor is mounted.
Return temperature sensor (ESMU, ESM-11 or ESMC)
The return sensor should always be placed in / on a pipe with
return water flow.
Room temperature sensor (ESM-10, ECA 60 / 62 room
panel or ECA 61 / 63 remote control)
Place the room sensor in the room where the temperature is
to be controlled. Do not place it on outside walls or close to
radiators, windows or doors.
DHW temperature sensor (ESMU or ESMB-12)
Place the DHW temperature sensor according to the
manufacturer's specification.
Boiler temperature sensor (ESMU, ESM-11 or ESMC)
Place the sensor according to the boiler manufacturer's
specification.
Flow / air duct temperature sensor (ESM-11, ESMB-12,
ESMC or ESMU types)
Place the sensor so that it measures a representative
temperature.
Slab temperature sensor (ESMB-12)
Place the sensor in the slab.
Valid for ESM-11: Do not move the sensor after it has been
fastened in order to avoid damage to the sensor element.
14b