DEVICE SETTINGS → SERVICE → HEATING
→ HEATING CIRCUIT 1
The heating circuit takes the heating energy either directly from the heat pump’s condenser or its buffer
tank. The Connection setting determines which method is used. This option, in turn, allows you to select
the equipment installed in the circuit. The settings for Circuit 2 and 3 are identical to Circuit 1 settings.
Direct connection, with pump
The system has a circulation pump which is controlled by the heat pump.
Circuit used
Valve control
The system has a circulation pump and a 3-way control valve, both of which are
controlled by the heat pump.
The pump is available as an optional accessory.
Accessory
Heating circuit pump
Designation
34023128
Description
Grundfos UPM3 AUTO 25–70 130 12h
Cable
34023128
Pump operating mode
Check the pump’s current operating mode by pressing the pump’s button briefly. To
change the operating mode:
1. Press and hold the button for more than 2 seconds.
2. Scroll between operating modes by pressing the button.
3. Once you have reached the right operating mode, wait for 10 seconds, and the
setting will be saved
If you accidentally scroll past the required operating mode, press the button repeatedly
until you circle around again. The button has a button lock; unlock and lock the button
by pressing and holding it for 10 seconds.
The pump has several different operating modes. In most cases, it is advisable to use
the constant pressure mode with AUTOADAPT function. This mode is active, when the
second LED from the left is green.
Heating circuit pump operating mode ver. 1
If you do not wish to use the AUTOADAPT function, open the valves in floor heating
circuits during commissioning and set the pump speed to a level that allows the flow
rate in each circuit to be adjusted to a suitable level. After this, return the valves to their
normal position. In radiator heating systems, remove any thermostats and set the pump
speed to a level that allows the flow in each radiator to be adjusted to a suitable level.
Once the adjustment is complete, reinstall the thermostats.
Constant pressure control
The pressure produced by the pump (i.e. the head of the pump) remains at a near
constant level regardless of the flow (demand for heating). This control mode is
suitable for systems where the bulk of the pressure loss can be attributed to the
actual heating circuit or its heating emitters, and not to a shared distribution circuit.
Typical examples of such systems include floor heating and radiator heating systems
incorporating a manifold.
M8006 2123EN
29 (54)
