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Full extra heater
Determines, after all heat pumps have been started, how much the integral is
allowed to sink before the extra heater is run at maximum power.
Integral dead zone
Determines, after the extra heater is at maximum power, how much the inte-
gral is allowed to sink before the value is limited.
lim force hp start
If the primary supply temperature falls below the set point more than this set-
ting allows, one heat pump is immediately started, unless one is already run-
ning to make heat.
lim force eh start
If the primary supply temperature falls below the set point more than this set-
ting allows, the integral value is set to the limit for the start of the extra heater,
unless that limit has already been passed.
3�6�3 extra heater
extra heater type
This setting defines the type of extra heater that is controlled by the system.
Heat up delay
Heat up delay time, from when the extra heater blocking is released, starting
the burner, until the shunt valve starts to use heat from the burner subsys-
tem.
Burner off delay
Delay from when the valve is shut off completely until the burner is turned
off.
Turn on limit
An extra heater in the form of an electric heater that can only be on or off is
controlled not only by the integral value, but also by temperature limits. If the
primary supply temperature sinks below the set point more than this limit al-
lows, the heater will be started, provided that the integral is within the work
area for the extra heater.
Turn off limit
The electric extra heater will be turned off if the primary supply temperature
exceeds the set point by more than this limit allows.
3�6�4 Heat stop
Heat stop limit
Outdoor temperature limit for blocking heat production.
Heat stop hyst
This setting determines how much below the stop limit the outdoor tempera-
ture must fall for the heat production blocking to be lifted.
24 – Danfoss
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