Table of Contents
Advertisement
Information on the product | Function
The heating actuator possesses a heat requirement and pump controller. This pro-
duces a positive impact on the energy consumption of a housing or commercial build-
ing through the transmission and evaluation of the largest command value in the
heating or cooling system. The information on the largest active command value can
be made available to suitable calorific furnaces with integrated KNX controller directly
via a KNX telegram (1-byte constant), for example, to determine the optimum flow
temperature. Alternatively or additionally, the heating actuator can even evaluate the
command values of its outputs and make general heat requirement information avail-
able in the form of limiting value monitoring with hysteresis (1-bit, switching). Using a
KNX switch actuator, this allows the energy-efficient activation of burner and boiler
controllers with suitable control inputs (e.g. requirement-orientated switchover
between the reduction and comfort setpoint in a central combi boiler).
The heating actuator also allows switching activation of the circulation pump of the
heating or cooling circuit via a 1-bit KNX telegram. When using pump control, the
pump is only switched on by the actuator when at least one command value of the
outputs exceeds a limiting value with hysteresis defined in the ETS. The pump is
switched off when the limiting value is reached or undershot again. This saves elec-
trical energy, as the pump is only activated by sufficiently large, and thus effective,
command values. Optional cyclical anti-sticking protection prevents the sticking of the
pump, if it has not been switched on by the command value evaluation for a longer
period of time.
To prevent calcification or sticking of a valve which has not been activated for some
time, the actuator has an automatic valve rinsing function. Valve rinsing can be ex-
ecuted cyclically or using a bus command, causing the activated valves to run
through the full valve stroke for a preset period of time. If necessary, the intelligent
valve rinsing can be enabled. In so doing, cyclical rinsing using the full stroke is only
executed when a defined minimum command value limiting value was not exceeded
during actuator operation.
Cyclical monitoring of the command values can be performed as an option. If, during
active cyclical monitoring, there are no command value telegrams during a preset
time, then emergency operation is activated for the affected valve output, for which a
configurable constant PWM command value can be preset. In addition, it is possible
to activate a forced position separately for each output using a 1-bit KNX object. A
defined PWM command value is set at the appropriate output.
Emergency operation and forced position can also be activated automatically in case
of bus voltage failure, after bus voltage return or after an ETS programming opera-
tion. If necessary, the command values for emergency operation and the forced posi-
tion can be influenced by the summer and winter mode of the actuator, allowing the
activation of different heating or cooling levels according to the season. The actuator
permits switchover between summer and winter mode at any time using a 1-bit ob-
ject.
The heating actuator possesses comprehensive status functions. The active com-
mand value can be made available as status information, separately for each valve
output.
The actuator is able to detect an overload or a short-circuit at the valve outputs and,
in consequence, to protect them against destruction. Outputs which have experi-
enced a short-circuit or a constant load are deactivated after an identification period.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
Page 7 of 257
Advertisement
Table of Contents
