Bosch KWB42-3 User Manual

50 | Commissioning
Greenstar FS
6 720 810 590 (2015/05)
▶ Open the automatic vent [9] (only combi boiler KWB..-3A) and close
it again when the purging sequence has finished ( page 49).
Shutdown
▶ Switch appliance OFF using the ON/OFF switch.
The display goes out.
▶ If the appliance is taken out of service for a longer period: Observe
frost protection ( Section 8.10).
8.3 Setting up space heating
Set the maximum supply temperature based on the structure's heat loss
on design day.
▶ In order to set the maximum supply temperature, turn the boiler high
limit dial .
Fig. 56 Switch on heat
If the burner is operating, the burner operation indicator lamp is
illuminated.
8.4 Programming the FW 200 heating control unit
(optional accessory)
Fig. 57 FW 200 heating control with front flap closed / flap opened
Legend to Fig. 57:
[1] Dial
[2] Mode selector
[3] Advance button (activate heating immediately)
[4] DHW single charge button (activate DHW mode immediately)
[5] Menu button
[6] Info button
[7] Delete/Reset button
[8] Menu up button
When the appliance is switched ON for the first time, it
performs a once-only purging sequence. This involves
the heating zone pump switching on and off at intervals
(for approx. 4 minutes).
The display shows in alternation with the supply
temperature.
If the display shows in alternation with the supply
temperature, the trap filling function is active
( page 59).
Boiler high
limit dial
Typical supply
temperatures
Sample application
1 approx. 95 °F (35 °C) Frost protection
2 approx. 109 °F (43 °C)
3 approx. 122 °F (50 °C) Radiant floor heating system
4 approx. 140 °F (60 °C) Panel radiator system
5 approx. 153 °F (67 °C) Cast iron radiator system
6 approx. 167 °F (75 °C)
max approx. 194 °F (90 °C) Baseboard & convector system
Table 16 Typical supply temperatures
With radiant floor heating, limit the maximum
permissible supply temperature as recommended by the
manufacturer.
eco
reset
6 720 641 933-53.2O
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The FW200 outdoor reset control units an optional
accessory which enables the boiler to be operated more
efficiently by allowing the user to optimize the heating
system
Observe the operating instructions for the heating
control included in the scope of delivery. There you can
read:
▶ How to set the operating mode and the heating curve
for weather compensation controls
▶ How to adjust the room temperature
▶ How to heat economically and comfortably
▶ How the control can be mounted in the boiler or in the
living space
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Bosch KWB42-3 Specifications

General

Brand	Bosch
Model	KWB42-3
Category	Boiler
Language	English