Sub-Menu Defrost; Sub Menu Optimum - Danfoss DHP-A Installation Instructions Manual

9.6

Sub-menu DEFROST

The menu applies to DHP-A, DHP-AL with defrost card and only appears if OUTDOOR AIR in SERVICE -> INSTALLA-
TION -> SYSTEM -> HEAT SOURCE menu is selected.
Table 22. Used to change settings for outdoor unit defrost.
Menu selection
DEFR CURVE 0
DEFR CURVE -xx
DEFR TEMPERA-
TURE
STOP DEFR
BELOW 5°C DEFR
MIN TIME DEFR
FAN START
FAN STOP
DEFR SENSOR
9.7

Sub menu OPTIMUM

The menu applies to Opti with speed controlled circulation pumps and only appears if ON in SERVICE -> INSTALLA-
TION -> SYSTEM -> ADDITION -> OPTIMUM menu is selected.
Table 23. Used to change the circulations pumps' operating settings.
Menu selection
TEMP DIFF CIRC.
TEMP DIFF BRINE
60 – Installation instructions VMBMA1002
Meaning
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 Important parameters for more information.
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 OUTDOOR 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 Important parameters for more
information.
The temperature shunted to the outdoor unit during a defrost.
The temperature that the Brine In sensor must reach to complete a
defrost.
Safety defrosting occurs when the outdoor temperature has been
below 5°C for a set number of days, shunts +20°C for 10 minutes.
Minimum time between two defrosts in minutes.
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.
The fan stops when the temperature on the brine in sensor to the
heat pump reaches the set value.
Shows the actual temperature of the incoming air to the outdoor
unit.
Meaning
Desired temperature difference between supply and return line
for the heating system.
Desired temperature difference between supply and return line
for the brine system.
Factory setting
-10°C
(range: -15°C / -5°C)
OUTDOOR STOP reduced by 4°C
(range: - 8°C / - 1°C)
15°C
(range: 13°C / 25°C)
11°C
(range: 7°C / 12°C)
7D
(range: , 1D / 14D)
45M
(range: 10M / 60M)
-2°C
(range: ON, -5°C / FAN STOP-3°C)
17°C
(range: FAN START +3°C / 30°C)
Factory setting
8°C
(range: , 0°C / 15°C)
3°C
(range: , 0°C / 15°C)