eta T2-BT Configuration

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[Aux.boiler] function block Configuration parameter
The auxiliary boiler with priority 1 is defined as the
"main boiler" and will be put into operation first. The
auxiliary boilers with the priorities 2, 3 and 4 are auto-
matically put into operation in this order when the main
auxiliary boiler can no longer meet the demands.
Regardless of the priority setting, auxiliary boilers
always have lower priority than an ETA boiler.
Explanation of [AuxBoilerMax]
The maximum temperature of the auxiliary boiler is set
with this parameter. If it exceeds this temperature, it
will be switched off.
Explanation of [Enable AuxBoilChargePump]
Optional: only for [Aux.boiler charging pump]
This parameter is used to set the minimum
temperature of the auxiliary boiler for starting its
charging pump.
Explanation of [Thermostat diff.]
Optional: only for [Aux.boiler charging pump]
This parameter is used to set the minimum difference
between the temperature [Tank temperature] of the
tank to be charged (buffer or hot water) and the
temperature of the auxiliary boiler [AuxBoilerTemp] for
starting the auxiliary boiler charging pump.
Explanation of [Hysteresis] for auxiliary boiler
charging pump
Optional: only for [Aux.boiler charging pump]
To start the auxiliary boiler charging pump, the
auxiliary boiler's temperature must be higher than
[Enable AuxBoilChargePump]. At the same time, the
[Thermostat diff.] plus the [Hysteresis] must be
exceeded with respect to the tank temperature.
Example:
[Enable AuxBoilChargePump] = 50 °C
[Thermostat diff.] = 5 °C
[Hysteresis] = 2 °C
=> The auxiliary boiler charging pump will be switched
on as soon as the auxiliary boiler has exceeded the
minimum temperature of 50 °C and is also 7 °C
warmer than the tank that needs charging.
The auxiliary boiler charging pump is switched back off
as soon as the auxiliary boiler is cooler than the tank
temperature plus the [Thermostat diff.].
Or if the auxiliary boiler goes below the [Enable Aux-
BoilChargePump] minus the [Hysteresis].
Explanation of [MixValve runtime]
This parameter sets the running time for the mixing
valve actuator, the time needed to turn it from the
closed to the fully open position.
Set the running time according to the information
on the mixing valve actuator's type plate.

eta T2-BT Specifications

General

Brand	eta
Model	T2-BT
Category	Control Panel
Language	English