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Commissioning
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.
▶ Open the automatic vent [15](only combi boiler KWB..-3A) and
close it again when the purging sequence has finished ( figure 7
item 15).
If the display shows
in alternation with the supply temperature, the
trap filling function is active ( page 59).
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 8.9).
8.3
Setting up space heating
Set the maximum supply temperature based on the structure's heat loss
on design day.
Boiler high
Typical supply
limit dial (
temperatures
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
Table 26 Typical supply temperatures
With radiant floor heating, limit the maximum permissible supply
temperature as recommended by the manufacturer.
▶ In order to set the maximum supply temperature, turn the boiler high
limit dial (
3
4
2
1
Fig. 59 Switch on heat
If the burner is operating, the burner operation indicator lamp is
illuminated.
52
Sample application
system
reset
eco
3
4
e
5
2
6
1
6
max
min
max
6 720 641 933-53.2O
8.4
Programming the Bosch room controller
Refer to the operating instructions for the Bosch room controller
included in the scope of delivery. The instructions contain information
on:
▶ setting up the operating mode
▶ adjusting the room temperature
▶ heating economically for comfortable temperatures
▶ mounting the controller in the reference room
1
2
3
Fig. 60 FW 200 controls
Item Name Description
1
Knob
Turn to change a setting or select a menu/menu item.
Press to open a menu/menu item or confirm a setting/
message.
2
auto
Press to activate the automatic mode
3
man
Press to active the hold mode (manual operation)
4
black
Press to return to the next higher menu level or to
discard a setting
Press for an extended period of time to close the main
menu
5
menu Press to open the main menu
Table 27
BodyText
8.5
After commissioning
▶ Check flue path for tightness.
▶ Check gas supply dynamic pressure (Fig. 12.3).
▶ Check that condensate is being discharged from the condensate
hose. If that is not the case, switch the appliance first OFF and then
ON again using the ON/OFF switch. That activates the trap filling
sequence ( Page 59). Repeat the procedure several times until
condensate starts running out.
▶ Complete commissioning report ( Page 80).
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
5
4
6 720 815 159-06.1O
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