4 Operation, specialist
4.2 Menu item – Basic Settings
4.2.1 Boiler temperature
Actual temp.: Actual temperature of the boiler water
Desired temp. 1: Target temperature of the boiler water at normal operation. In the example above the boiler
temperature fluctuates between 62 and 70 °C.
Heating limit night: Target temperature of the boiler water at request via input “External 2”. (External 2 mode
must be set to “Heat to target2, see point 4.2.10.1.1)
The control system has an automatic setpoint calculation feature. The value set for “Target” (1st or 2nd setpoint) is
the minimum setpoint (setting range 65 to 80 °C) of the boiler water temperature. If the value determined from the
highest requested consumer forward flow temperature is +3 °C greater, it is specified as the calculated setpoint. In
this manner the setpoint can slide between the set minimum value and max. 80 °C. In the example above “Target 1”
can slide between 70 and 80 °C depending on the consumer request. “Target 2” is the max. boiler target temperature,
it is the high limit so that sliding is not possible. If there is no specification from the consumers (e.g. without heating
circuit module) then the system is regulated to the adjusted minimum setpoint.
4.2.2 Return flow boost
Thermal valve: The minimum temperature on the boiler return flow is regulated by a thermal valve.
Mixer control
system:
The minimum temperature on the boiler return flow is regulated by a mixer connected to the
control system.
Bypass pump: The minimum temperature on the boiler return flow is governed by a speed-regulated pump
in the bypass between boiler forward flow and boiler return flow. This hydraulic circuit is not
possible in combination with a buffer.
The set variant is shown by the initials in the header.
The possible wiring variants of the return flow boost are provided in diagram MBEH0001 in section 17.
MA-Easyfire 10.2008_EN.indd 50MA-Easyfire 10.2008_EN.indd 50 30.03.2009 13:30:07 Uhr30.03.2009 13:30:07 Uhr
To Next Page
Loading...
Need help?
General
