3 Heating circuits
3.1 Buffer tank
Enable the buffer tank from
Initial Setup
settings (see chapter
Commissioning
) or from
Heating
settings (see the table below)
DEVICE SETTINGS → SERVICE → HEATING
Heating circuits take their heating energy either directly from the heat pump’s condenser or the heating
circuit’s buffer tank. The Connection setting determines which method is used. Each circuit’s equipment is
selected under the relevant circuit.
Buffer not used:
The heat pump is connected directly to the building’s heating
system without a buffer tank. The configuration may include a flow-through water
tank, but not a buffer tank regulated by the heat pump.
Connection
Buffer in use:
The heat pump is connected to a buffer tank which is regulated by
the heat pump. The tank is equipped with a temperature sensor which is connected
to the heat pump. Any heating circuits in the system are connected to the buffer
tank.
You can enable the buffer tank only if buffer tank temperature measurement is
enabled. The temperature sensor used for this is the buffer tank sensor (TE255). See
the instructions for installing the sensor in section
Buffer tank sensor
.
3.2 Buffer tank sensor (CUBE, ECO)
ECO heat pumps come with the buffer tank temperature sensor (TE255) already
connected. In CUBE heat pumps, the sensor is an optional accessory.
Accessory
Temperature sensor NTC10k 5 m
Designation
36217266
Description
Sensor with flexible cable (length: 5 m), metallic probe (diameter: 6mm, length: 50
mm), 1xNTC 10 kOhm, 2 wires, B(25/85)=3976, t
0,9
7 s
Intended use
Buffer tank temperature TE255
Heating circuit flow temperature TE212, TE222, TE232
Connections (CUBE)
The connections for the buffer tank sensor are indicated in the unit’s electric diagram.
To connect the storage tank sensor, disconnect sensor TE201 from terminal block X3’s
terminals 2 and M and connect storage tank sensor TE201 in its place (either wire in
either terminal). Protect the exposed wire ends of the disconnected sensor cable.
Located inside the unit, the disconnected sensor (TE201) is used to monitor the
temperature of the heating water return line (‘condenser in’). If there is a buffer
tank in the heating circuit, the sensor is not in use. If you wish to enable both the
buffer tank sensor (TE255) and the condenser return temperature sensor (TE201),
install an auxiliary controller in the switchboard and connect the buffer tank sensor
22 (54)
M8006 2123EN
