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BC10 basic controller 10
41
We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
10.3.2 Setting the DHW temperature value
z Turn the "DHW temperature" rotary knob to set the
desired temperature of the hot water in the hot-water
tank.
10.3.3 Entering the heater water temperature
z Turn the "heater water temperature" knob to set the
upper limit value of the heater water for the heating
operation. This limitation does not apply to DHW
preparation.
10.3.4 Setting the pump post-purge period
A pump must be connected to PK (see fig. 23, pos. 7) of
the external connection board in order to be able to set
the pump run over time.
z Press and hold the "Chimney Sweep"
and
"Service"
buttons until the display shows "/".
z Press the "Service"
button. The display shows
")". The heating system has been factory-set to a
pump post-purge period of 5 minutes.
140
130
120
90
100
110
Condition Explanation LED
0 Off No hot water supply (only heating mode). Off
Eco
1
Economy mode,
Hot water temperature 140 °F
(60 °C)
The DHW will only be reheated to 140 °F (60 °C), if the temperature has
signifcantly fallen. This reduces the number of burner starts and saves energy.
As a result the water may be a bit colder initially.
On
2
86–140 Direct setting on BC10 in °F The temperature set on the BC10 is a temperature that cannot be changed using
a RC thermostat.
On
2
Aut Entry via thermostat
(presetting)
The temperature is set on the thermostat (e. g. RC30). If no thermostat is
connected, the maximum DHW temperature is 140 °F (60 °C).
On
2
Table 11 Settings of "DHW temperature" knob
1
This function has been optimized for appliances with combined DHW heating (combi-units).
2
The heating program (timer) of the room control unit remains active, as a result of which no hot water is heated during night-time operation.
3
The LED under the rotary knob lights up if the DHW temperature is below the target value (heat request for DHW).
190
170
150
130
90
110
Condition Explanation LED
0 Off No supply to heating system (only DHW operation). Off
86 – 190 Direct setting on BC10 in °F
(86 – 190 °F = 30 – 90 °C)
The temperature set on the BC10 is a temperature that cannot be changed
using a RC thermostat. Supply temperature does not rise above the set
temperature.
On
1
Aut Entry via thermostat
(presetting)
The temperature is automatically determined on the basis of the heating
characteristic. If no thermostat is connected, the maximum heater temperature
is 190 °F (90 °C).
On
1
Table 12 Settings of "heater water temperature" rotary knob
1
The LED under the rotary knob lights up when the heating system is switched on and heat is requested. In summer mode the heating system is
switched off (LED off).
CAUTION
Set the appliance primary pump post-purge
period to 24 hours if the heating system is
controlled by room temperature sensor and
there is a risk of parts of the heating system
that are outside the coverage of the room
thermostat freezing (e. g. radiators in a
garage; constant circulation).
+
41


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