Thermia Atria Optimum, Installation Manual

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Menu selection Meaning Factory setting
BELOW 5°C DEFR
Safety defrosting occurs when the outdoor temperature has been below 5°C for a set
number of days, 20°C for 10 minutes.
7D(range: ,
1D / 14D)
MIN TIME DEFR Minimum time between two defrosts in minutes. 45M(range:
10M / 60M)
FAN START The fan starts when the temperature on the brine in sensor to the heat pump reaches the
set value.
If FAN START is set to ON, the fans starts and stops at the same time as the compressor
and the FAN STOP parameter is inactive.
-2°C(range: ON,
-5°C / FAN
STOP-3°C)
FAN STOP The fan stops when the temperature on the brine in sensor to the heat pump reaches the
set value.
17°C(range: FAN
START +3°C /
30°C)
DEFR SENSOR Shows the actual temperature of the incoming air to the outdoor unit.
9.7 Sub menu OPTIMUM
The menu applies to heat pumps with speed controlled circulation pumps and only appears if ON in SERVICE -> INSTALLATION -> SYS-
TEM -> ADDITION -> OPTIMUM menu is selected.
Menu selection Meaning Factory setting
TEMP DIFF CIRC.
Desired temperature difference between supply and return line for the heating system.
8°C(range: ,
0°C / 15°C)
TEMP DIFF BRINE
Desired temperature difference between supply and return line for the brine system.
3°C(range: ,
0°C / 15°C)
START FLOW CIRC. Speed control of the heating system’s circulation pump in Volts. Higher voltage gives a
greater circulation pump speed, which gives a lower temperature difference. A low volt-
age gives a greater difference. 3 - 10 = Manually adjustable speed, where 3 is low voltage
and 10 is high voltage.
7V(range: 3V /
10V)
START FLOW BRINE Speed control of the brine system’s circulation pump in Volts. Higher voltage gives a
greater brine pump speed, which gives a lower temperature difference. A low voltage
gives a greater difference. 3 - 10 = Manually adjustable speed, where 3 is low voltage and
10 is high voltage.
10V(range: 3V /
10V)
CONST. FL. CIRC.
If TEMP DIFF CIRC is set to the flow is continuous with this value in the heating sys-
tem. Value indicated in Volts.
7V(range: 3V /
10V)
CONST. FL. BRINE
If TEMP DIFF BRINE is set to the flow is continuous with this value in the brine system.
Value indicated in Volts.
10V(range: 3V /
10V)
MIN FLOW CIRC.
Lowest permitted voltage (speed) of the circulation pump’s flow in the heating system. If
there is no heat demand, there may still be a demand to read in the temperatures for the
sensors in the system and the circulation pump therefore must be run.
3V(range: 3V /
10V)
MAX H.W CHARGE HW Highest supply temperature during water heating.
55°C(range:
45°C / 65°C)
MIN CHARGE. HW
Lowest desired supply temperature during water heating. 50°C(range:
30°C / 65°C)
Installation Guide Domestic heat pumps
Thermia Värmepumpar VMGFP202
57