6 Using the heating system – ON/OFF menu
88
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
S
ELECTING
AND
SETTING
BOILER
ACTIVATION
In boiler activation mode, there are various ways of switching the
heating system on and off.
•
Accumulator temperature sensor
In this version, the heating system is switched on and off through
two accumulator temperature sensors. After falling below the preset
temperature at the “Acc. top” sensor, the boiler is started. After
exceeding the preset temperature at the “Acc. bottom” sensor, the
boiler is switched off.
✎
See section “6.7 °C/QUANTITY menu” in this chapter.
•
Accumulator and external
In this version, the heating system is switched on and off if the
accumulator temperature sensor has enabled this and there is a
simultaneous external demand.
•
Accumulator or external
In this version, the heating system is switched on and off if the
accumulator temperature sensor has enabled this or there is a
simultaneous external demand.
•
On
In this version, the heating system is switched on and off through the
boiler supply temperature sensor. The accumulator temperature
sensors are ignored.
•
Thermostat
In this version, the heating system is switched off through the boiler
supply temperature sensor and switched on through the
accumulator thermostat.
•
External
In this version, the heating system is switched on and off through an
external controller. Observe the terminal connection points on the
wiring diagram in the control cabinet.
✎
See “Procedure” in this section.
A
CTIVATING
OR
DEACTIVATING
AUTOMATIC
IGNITION
The automatic ignition function can be switched off, thus activating
the function for sustaining the embers.
✎
See “Procedure” in this section.
A
CTIVATING
THE
FUNCTION
“L
AMBDA
S
TOP
”
If the specified minimum residual oxygen value is not met, the fuel
feeding is interrupted until the residual oxygen values are again
within the acceptable range.
✎
See “Procedure” in this section.
The standard setting for systems with accumulators is
Acc.
temp. sensor
.
The standard setting is
On.
Sustaining the embers is only performed in emergency operation!
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