– Adjust the mixer valve.
• F1255 in incorrect operating mode.
– Enter menu 4.2. If mode "auto" is selected, select a higher value on
"stop additional heat" in menu 4.9.2.
– If mode "manual" is selected, select "addition".
• Large hot water consumption.
– Wait until the hot water has heated up. Temporarily increased hot
water capacity (temporary lux) can be activated in menu 2.1.
• Too low hot water setting.
– Enter menu 2.2 and select a higher comfort mode.
• Too low or no operating prioritisation of hot water.
– Enter menu 4.9.1 and increase the time for when hot water is to be
prioritised. Note that, if the time for hot water is increased, the time
for heating production is reduced, which can give lower/uneven room
temperatures.
LOW ROOM TEMPERATURE
• Closed thermostats in several rooms.
– Set the thermostats to max, in as many rooms as possible. Adjust
the room temperature via menu 1.1, instead of choking the thermo-
stats.
See the "Saving tips" section for more detailed information about
how to best set the thermostats.
• Too low set value on the automatic heating control.
– Enter menu 1.1 "temperature" and adjust the offset heating curve
up. If the room temperature is only low in cold weather the curve
slope in menu 1.9.1 "heating curve" needs adjusting up.
• F1255 in incorrect operating mode.
– Enter menu 4.2. If mode "auto" is selected, select a higher value on
"stop heating" in menu 4.9.2.
– If mode "manual" is selected, select "heating". If this is not enough,
select "addition".
• Too low or no operating prioritisation of heat.
NIBE F1255
Chapter 4 | Disturbances in comfort
78