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

Installation Guide
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- Meaning
tion
Used to set the temperature of the heat pump's brine return at which defrosting should
DEFR CURVE
start, at 0°C outdoor temperature, using + or -.
0
The graph can be changed up or down at 0°C outdoor temperature in the display.
See Service instructions for more information.
Used to set the temperature at which the heat pump's brine return is to start a defrost,
DEFR CURVE
at the set outdoor temperature for OUTDOOR STOP, using +or-.
-xx
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.
The temperature shunted to the outdoor unit during a defrost.
DEFR TEM-
PERATURE
The temperature that the Brine In sensor must reach to complete a defrost.
STOP DEFR
Safety defrosting occurs when the outdoor temperature has been below 5°C for a set
BELOW 5°C
number of days, shunts +20°C for 10 minutes.
DEFR
Minimum time between two defrosts in minutes.
MIN TIME
DEFR
The fan starts when the temperature on the brine in sensor to the heat pump reaches
FAN START
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
FAN STOP
the set value.
DEFR SEN- Shows the actual temperature of the incoming air to the outdoor unit.
SOR
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
TEMP DIFF CIRC. Desired temperature difference between supply and return line for the heating system.
TEMP DIFF BRINE Desired temperature difference between supply and return line for the brine system.
START FLOW 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
CIRC.
gives a greater difference.3 - 10 = Manually adjustable speed, where 3 is low voltage and 10
is high voltage.
Speed control of the brine system's circulation pump in Volts. Higher voltage gives a greater
START FLOW
brine pump speed, which gives a lower temperature difference. A low voltage gives a great-
BRINE
er difference.3 - 10 = Manually adjustable speed, where 3 is low voltage and 10 is high volt-
age.
CONST. FL. CIRC. If TEMP DIFF CIRC is set to
Value indicated in Volts.
CONST. FL.
If TEMP DIFF BRINE is set to
BRINE
Value indicated in Volts.
48
Domestic heat pumps
the flow is continuous with this value in the heating system.
the flow is continuous with this value in the brine system.
VMGFQ102
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)
7V(range: 3V / 10V)
10V(range: 3V / 10V)
7V(range: 3V / 10V)
10V(range: 3V / 10V)
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