9.6
Sub-menu DEFROST
The menu applies to DHP-A with defrost card and only appears if OUTDOOR AIR in SERVICE -> INSTALLATION -> SYSTEM -> HEAT
SOURCE menu is selected.
Menu selec-
tion
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 TEM-
PERATURE
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)
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 SEN-
SOR
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 voltage
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 great-
er difference.3 - 10 = Manually adjustable speed, where 3 is low voltage and 10 is high volt-
age.
10V(range: 3V / 10V)
CONST. FL. CIRC. If TEMP DIFF CIRC is set to the flow is continuous with this value in the heating system.
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)
Installation Guide
Domestic heat pumps
VMGFQ102
Danfoss Heating Solutions
48
