buffer tank sensor (TE255) and the condenser return temperature sensor (TE201),
install an auxiliary controller in the switchboard and connect the buffer tank sensor
to the auxiliary controller. Select the terminals for the buffer tank sensor from the
auxiliary controller’s settings. The auxiliary controller will be delivered with additional
instructions.
Connections (ECO)
If the heating circuit has no buffer tank, disconnect the sensor from the relevant
terminal block.
Installation
See the instructions for commissioning the buffer tank in section
Buffer tank.
Install the sensor in the buffer tank as specified in the piping diagram.
● If a dedicated tank is used, install the sensor in the upper section of the tank, below
the heating circuit outlets.
● If using a combined storage tank with separate sections for DHW heating and
space heating, install the sensor in the lower section of the tank.
Install the sensor probe into a sensor pocket designed for 6-mm probes. The sensor
pocket needs to extend into the interior of the tank by at least 150 mm. The sensor
pocket is available as an accessory, see section
Accessories.
Considerations
Install the sensor in a way that allows it to measure the temperature of the fluid in the
storage tank as accurately as possible. The sensor pocket needs to extend far enough
into the interior of the tank, and the sensor pocket’s internal diameter must be suitable
for the sensor probe’s diameter.
● Use only metallic sensor pockets that won't corrode to any significant degree (from
the outside or the inside) over time.
● The air gap between the probe and the pocket wall should be as small as possible.
If necessary, use thermal paste between the sensor probe and the pocket walls.
● To ensure that the sensor probe remains firmly seated at the bottom of the sensor
pocket, secure the sensor cable with a cable gland.
The sensor cable is approximately 4.5 m long. The sensor probe’s diameter is 6 mm
and length 50 mm.
The cable can be extended if required. Use a regular insulated copper twin cable for
connecting the cable and extending the cable (0.5 mm
2
, length < 40 m).
● Join or splice the cable ends in a way that causes no additional electrical resistance
in the wires.
● Protect the joint against moisture and oxidation.
3.3 Flow temperature sensor for heating circuit 1
ECO heat pumps come with the flow sensor for heating circuit 1 (TE212) already
connected. In CUBE models, the sensor is an optional accessory.
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M8006 2314EN
