Operating
mode
Meaning
HOT WATER
In this mode the heat pump only produces hot water, no
heat goes to the heating system.
MANUAL TEST
Only displayed when the value for MANUAL TEST is set to
2 in
The SERVICE menu. Outputs that control components are
activated manually.
Caution! If the operating mode OFF or HOT WATER is to be
used for long periods during the winter, the water in the
heating system in the heating system must be drained,
otherwise there is a risk of frost damage.
Alternatively the system solution with intermediate exchanger
should be used.
5.2
Adjusting the indoor temperature
The indoor temperature is adjusted by changing the heat pump’s heat
curve, which is the control system’s tool for calculating the heating
demand, the integral value. The integral value is determined by compar-
ing the actual temperature of the heating system's supply line with the
calculated value, the setpoint value.
The heating requirement is calculated from the current outdoor temper-
ature and heat curve setting.
The heat curve will be adjusted in connection with installation. It must
be adapted later on, however, to obtain a pleasant indoor temperature
in any weather conditions. A correctly set heat curve reduces mainte-
nance and gives energy efficient operation.
There are two ways of adjusting the heat curve, partly in the HEATING
sub-menu, partly with the ROOM value.
Adjusting CURVE
A typical heat curve is shown below. When the outdoor temperature is
0°C the heat pump control tries to make the temperature in the supply
line 40°C. At hotter or colder outdoor temperatures than 0°C the set
User manual VUGFB102 – 17
