SYSTEM
Menu selection Meaning Factory setting
HEAT SOURCE GROUND OR ROCK
OUTSIDE AIR
(BRINE SOLUTION, DIRECT EVAP.)
B/W
COOLING PASSIVE COOLING
( , INTEGRATED IN HP)
ACTIVE COOLING
( , PASSIVE/ACTIVE, ACTIVE)
ROOM SENSOR
(
, ON)
POOL
, ON
SHUNT GROUP
, ON
BUFFER TANK (See sep-
arate instruction for buf-
fer tank)
BUFFER TANK
SYSTEM SHUNT
2ND H.C SHUNT
ADDITION OPTIMUM
( , ON)
HGW
( , ON)
0-10 V
( , EXT.AUX.HEATER)
FLOW SENSOR
( , ON)
Permanently ON
or ON/ de-
pending on
model.
CURRENT LIMITER
( , ON)
PHASE FAULT
( , PHASE READING)
9.6 Sub-menu DEFROST
The menu applies to Atria Optimum and Atria Duo Optimum with defrost card and only appears if OUTDOOR AIR in SERVICE -> INSTAL-
LATION -> SYSTEM -> HEAT SOURCE menu is selected.
Menu selection
Meaning Factory setting
DEFR CURVE 0 Used to set the temperature of the heat pump’s brine return at which defrosting should
start, at 0°C outdoor temperature, using + or -.
The graph can be changed up or down at 0°C outdoor temperature in the display.
See Service instructions for more information.
-10°C(range: -15°
C / -5°C)
DEFR CURVE -xx Used to set the temperature at which the heat pump's brine return is to start a defrost, at
the set outdoor temperature for OUTDOOR STOP, using +or-.
The setting is made by reducing the OUTDOOR STOP value by this value.
The number of degrees shown after DEFR CURVE in the display is the set value for OUT-
DOOR STOP. The combined temperature is shown in the top right corner of the display.
The graph can be changed up or down at the outdoor temperature OUTDOOR STOP in
the display. See Service instructions for more information.
OUTDOOR STOP
reduced by 4°C
(range: - 8°C / -
1°C)
DEFR TEMPERATURE The temperature shunted to the outdoor unit during a defrost. 15°C(range:
13°C / 25°C)
STOP DEFR The temperature that the Brine In sensor must reach to complete a defrost. 11°C(range: 7°C /
12°C)
Installation Guide Domestic heat pumps
VMGFP202 Thermia Värmepumpar
56
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