Menu 2 – Hot water
OVERVIEW
2.1 - More hot water
2.2 - Hot water demand
2.4 - Periodic increase
2.5 - Hot water circulation
MENU 2.1 - MORE HOT WATER
Setting range: 3, 6 and 12 hours, as well as the
modes "Off" and "One-time increase".
When there is a temporary increase in hot water de-
mand, this menu can be used to select an increase in
the hot water temperature for a selectable time.
Caution
If demand mode "Large" is selected in menu
2.2, no further increase can be made.
The function is activated directly when a time period is
selected. The remaining time for the selected setting is
shown to the right.
When the time has run out, S1255 returns to the set
demand mode.
Select "Off" to switch off "More hot water".
MENU 2.2 - HOT WATER DEMAND
Alternative: Smart control, Small, Medium, Large
The difference between the selectable modes is the
temperature of the hot tap water. Higher temperature
means that the hot water lasts longer.
Smart control: With Smart control activated, S1255
continuously learns the previous hot water consumption
and thereby adapts the temperature in the water heater
for minimum energy consumption. If the hot water de-
mand is greater, there is a certain additional amount of
hot water available.
Small: This mode gives less hot water at a lower tem-
perature than the other alternatives. This mode can be
used in smaller households with a small hot water re-
quirement.
Medium: Normal mode gives a larger amount of hot
water and is suitable for most households.
Large: This mode gives the most hot water at a higher
temperature than the other alternatives. In this mode,
the immersion heater may be used in part to heat hot
water. In this mode, hot water production is prioritised.
MENU 2.4 - PERIODIC INCREASE
Period
Setting range: 1 - 90 days
Start time
Setting range: 00:00 - 23:59
To prevent bacterial growth in the water heater, the heat
pump and the immersion heater can increase the hot
water temperature once at regular intervals.
The length of time between increases can be selected
here. The time can be set between 1 and 90 days.
Tick/untick "Activated" to start/switch off the function.
MENU 2.5 - HOT WATER CIRCULATION
Run time
Setting range: 1 – 60 min
Downtime
Setting range: 0 – 60 min
Set hot water circulation for up to three periods per day
here. During the set periods, the hot water circulation
pump will run according to the settings above.
"Operating time." determines how long the hot water
circulation pump will run per operation.
"Downtime" determines how long the hot water circula-
tion pump will be stationary between operations.
NOTE
Hot water circulation is activated in menu 7.4
"Selectable in/outputs".
43Chapter 9 | Control - MenusNIBE S1255
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