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This kit is used to add a regulated underfloor heating circuit.
It is not permitted to install a room thermostat on the direct
circuit.
Make the hydraulic connections according to the examples provided
in this manual.
1. Install the outside temperature sensor.
See instructions for the external heating control system.
2. Connect the external heating control system to the 3-way circuit,
underfloor heating.
The external heating control system comes configured for an
underfloor heating circuit.
The external heating control system is IP20 (Protection Rating)
and cannot be installed in a laundry or a wet room.
See instructions for the external heating control system.
3. Clip the relay to the bracket in the heat pump's indoor module.
B000003-2
4. Connect the relay to the heat pump and the external heating
control system on the second circuit.
The relay is needed only if a domestic hot water 3-way valve is
used. The relay is needed for heat pumps equipped with a
domestic hot water tank. If the relay is not used, place a bridge
between the terminals 3 and the control system earthing.
5. Put the heating-conducting paste on the flow sensor and fix it to
the underfloor heating flow pipe using the clamp.
6. Connect the 3-way mixing valve, the outside temperature sensor,
the heating pump and the temperature sensor on the underfloor
heating circuit to the external heating control system.
7. Connect the external heating control system to the mains using
the power cord provided.
8. In the basic settings for the external heating control system
displayed on first-time commissioning, select program ECR 2
from the selection of diagrams.
Relay terminal
Domestic hot water 3-way valve control
A2
terminal on the heat pump (Connector X4).
Neutral terminal on the domestic hot water 3-
A1
way valve on the heat pump (Connector X4).
21
Control system terminal 3.
22
Earthing common to the sensor block.
6
3
Connecting
Control system
terminal
Temperature sensor in the underfloor heating
1 (S1)
circuit.
2 (S2)
Exterior temperature sensor.
3 (S3)
Relay 21 terminal.
Brown wire on the 3-way mixing valve cable
15 (R3)
(permanent phase).
Black wire in the 3-way mixing valve cable
16 (R2)
(Thermostat).
17 (R1)
Heating pump phase.
19 (L)
Control system power supply.
Earthing common
to the sensor
block
Earthing wire on the external heating control
Earthing
system.
N: Neutral
Connection to a room thermostat option on mixed circuit
- In a circuit with no domestic hot water production, connect the room
thermostat to terminal 3 (S3) on the external heating control
system.
S3
0V
- For the circuit with domestic hot water production, connect the
normally closed contact (NC) on the room thermostat to contact 22
on the common contact (C) in the terminal in the external heating
regulator. Connect the 21 contact from the relay to the 3 (S3)
terminal on the external heating control system.
S3
0V
C
A1
A2
NO
NC
EH493
Connecting
Earthing for the temperature sensor in the
underfloor heating circuit.
Outside temperature sensor earthing.
Relay 22 terminal.
Blue neutral wire for the 3-way mixing valve.
Neutral wire in the power supply to the
external heating control system.
Neutral wire on the heating pump.
T°C
C
NO
T°C
C
NO
26/05/2016 - 7623163-03
en
NC
B000074-1
NC
B000075-1
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