Installation guide

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9.6 Sub-menu DEFROST

The menu applies to DHP-A Opti with defrost card and only appears if OUTDOOR AIR in SERVICE -> INSTALLATION ->

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)

BELOW 5°C DEFR Safety defrosting occurs when the outdoor temperature has been below 5°C for a set

number of days, shunts +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)

VMGFQ202 Danfoss Heating Solutions

Installation Guide Domestic heat pumps