Maintenance
Vent 402 – 6721815546 (2021/03)
21
Fig. 25 Example of adjusted outdoor air temperature:
[1] Current outdoor air temperature
[2] Adjusted outdoor air temperature
7.8.2 Menu: Hot water
Regularly perform thermal disinfection to kill pathogens (e.g.,
legionella). In larger hot water systems, there may be legal requirements
for thermal disinfection.
Table 14 Domestic hot water settings
8 Maintenance
CAUTION
Notice:
Risk of deformation due to heat! The heat pump insulation material
(EPP) will deform if it is exposed to high temperatures.
Use a heat protection cover or wet rag as protection for the insulation
material during soldering work on the heat pump.
Use only original spare parts.
Order spare parts using the spare parts list.
In the event that a hydraulic component is replaced, remove and
replace old seals and O rings with new ones.
In conjunction with service work, the following procedures shall be
performed.
Show alarm to be activated
Check the alarm log.
Function check
Turn on and purge the system according 6.3 chapter.
Perform function check ( see chapter 8.4).
8.1 Menu: Refrigerant circ overview
A graphic representation of the heat pump is shown in this menu.
Menu options Description
ECO+ temp
range
(Lowest hot
water
temperature
operation that
gives the lowest
energy
consumption)
[Start]
30... 45 °C: Start (lowest) temperature for hot
water in Eco mode (standard temperature depends
on the installed heat source).
[Stop]
48... 65 °C: Stop (highest) temperature for hot
water in Eco mode (default temperature depends on
the installed heat source).
ECO temp range
(Medium hot
water
temperature
operation which
gives medium
energy
consumption)
[Start]
40... 52 °C: Start (lowest) temperature for hot
water in normal mode (standard temperature
depends on the installed heat source).
[Stop]
48... 65 °C: Stop (highest) temperature for hot
water in normal mode (standard temperature
depends on the installed heat source).
COMFORT temp
range
(Highest hot
water
temperature
operation that
gives the highest
energy
consumption)
[Start]
40... 57 °C: Start (lowest) temperature for hot
water in comfort mode (standard temperature
depends on the installed heat source).
[Stop]
48... 65 °C: Stop (highest) temperature for hot
water in comfort mode (standard temperature
depends on the installed heat source).
ECO+ start delay 4... 36 h: Start delay for DHW mode in Eco mode.
ECO start delay 4... 36 h: Start delay for DHW mode in normal mode.
COMFORT start
delay
4... 36 h: Start delay for DHW mode in comfort
mode.
2
1
0°C
20°C
0 h 12 h
24 h
0 010 008 067-001
Extra HW
temperature
50 ...65...70 °C: Heating temperature for extra hot
water.
Extra HW
runtime
1...2...48 h: Warm-up time for extra DHW.
Thermal
disinfection
[Automatic]: Thermal disinfection starts
automatically at the set time. Select [On] to
activate.
[Daily/weekday]: Selection range for the thermal
disinfection.
Daily: Thermal disinfection is performed daily.
[Monday... Sunday]: Thermal disinfection is
performed the selected day.
[Start time]
00:00 ... 06:00 ... 23:45: Time of day for starting
the thermal disinfection.
[Warm holding time] 0...1.5...6 h: Set the duration
for the thermal disinfection. The domestic hot water
temperature is maintained at the peak temperature
during this period.
[Maximum time] 2...4 h: Set the duration how long
the heat pump should try to reach the thermal
disinfection temperature.
Htg.-HW alt.
mode
[Yes]: The system will switch between DHW mode
and heating mode if there is a simultaneous demand
for heat and domestic hot water, based on the time
intervals set.
No: DHW mode has priority and interrupts heating
mode at the same time.
HW maximum
time
30...45...120 min: Duration of DHW heating.
Heating
maximum time
20...35...120 min: Duration of preheating.
Menu options Description
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