Danfoss DHP-AT, Installation Manual

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9.5 Default settings
The default DHW temperature is set to 50°C.
The following table shows the other default settings in the control system:
Menu Description Default value Range
00 Auto heating curve (value 43 relates to the number of the curve and
has no units of measure, A indicates that it is in automatic mode only)
A43 A24—50
01 Initial (desired) room temperature 20 °C 15—25 °C
02 House heating mode 1 1=Auto
0=Manual
03 Defrosting cycle 40 min 30—90 min
04 Coil temperature threshold for starting defrosting -6 °C From -20 °C to +5 °C
05 Coil temperature threshold for stopping defrosting 13 °C 1—30 °C
06 Maximum defrosting period 12 min 1—12 min
07 Domestic hot water hysteresis setting (i.e. number of degrees below
set point where the DHW will start again)
5 °C 1—20 °C
08 Heating hysteresis setting (i.e number of degrees below set point
where the heating will start again)
2 °C 1—20 °C
09 Overheating of electronic expansion valve in heating mode 2 °C From -20 °C to +20 °C
10 Overheating of electronic expansion valve in cooling mode 3 °C From -20 °C to + 20 °C
11 Time delay for compressor start-up after power-up (for example, after
a power cut-off)
1 min* 1—10 min
12 Circulation pump operation mode 1 1=Switched off when heating temper-
ature has been reached.
0=Continuous operation
13 Internal electrical heater operation during defrosting 1 1= Turned on
0=Turned off
14 Automatic legionella protection function 1 1=Activated
0=Deactivated
15 Internal electrical heater start option 0 0=Auto
1=Air-temperature condition set in
menu 16
2=Water temperature condition set in
menu 17
3= Conditions 1 and 2 must be met
16 Air temperature restriction for when internal electrical heater can
manually be started, that is, must be lower than this value.
-5 °C From -15 °C to +7 °C
17 Additional hysteresis in relation to menu 08 for when internal electri-
cal heater can manually be started.
2 °C 0—13 °C
18 Additional temperature hysteresis for hot water tank electrical heater
in relation to menu 07 for when the electrical heater will start.
5 °C 0—20 °C
19 Hot water tank electrical heater startup delay 30 min 30—90 min
20 Return water temperature Measured value From -30 °C to +99 °C
21 Supply water temperature Measured value From -30 °C to +99 °C
22 Coil temperature in heating mode (T7) Measured value From -30 °C to +99 °C
23 Coil temperature in cooling mode (T8) Measured value From -30 °C to +99 °C
24 Air temperature (T1) Measured value From -30 °C to +99 °C
25 Hot water tank temperature (T3) Measured value From -30 °C to +99 °C
26 Buffer tank temperature (T2) Measured value From -30 °C to +99 °C
27 Return gas temperature of compressor (T5) Measured value From -30 °C to +99 °C
28 Exhaust gas temperature of compressor (T4) Measured value From -30 °C to +99 °C
29 Shows the number of the operation steps for the expansion valve Measured value 100—480 steps
Installation Guide DHP-AT
Danfoss Heating Solutions VMGFI302
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