Before Operating The Appliance; Switching The Appliance On/Off; Switch On Heat; Setting The Dhw Temperature - Bosch Greenstar combi 100 p Installation And Service Instructions For Contractors

8.1

Before operating the appliance

NOTICE:
Commissioning without being properly filled and purged will
damage the appliance.
▶ Only operate this appliance after ensuring there is sufficient water in
the boiler and the system.
▶ Adjust the expansion vessel pre-charge pressure to the static head of
the heating system ( page 20).
▶ Open radiator and zone valves (as applicable).
▶ Open heating supply and return valves, fill heating system to 14.5 to
21.75 psi (1 - 1.5 bar) and close fill valve.
▶ Bleed all air from the system.
▶ If the boiler water pressure has dropped, fill the heating system again
to 14.5 to 21.75 psi (1 to 1.5 bar).
▶ Verify that the gas type specified on the rating plate is the same as the
gas type used.
▶ Open the gas cock.
8.2

Switching the appliance ON/OFF

Turning the space heating ON
▶ Switch the appliance ON using the ON/OFF switch.
The display indicates the supply temperature of the hot water in °F. If
necessary, convert to °C ( "Service function 0.E: Metric or US
customary units", page 44)
Fig. 47 Switching the appliance ON/OFF
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 symbol alternates on the display with the supply temperature.
▶ Open automatic air vent [9] and close again after bleeding (
page 36).
When alternates on the display with the supply temperature, the trap
filling function is active ( page 42).
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 8.6).
Greenstar combi 100 p / 151 p
8.3

Switch on heat

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)
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. 187 °F (86 °C) Baseboard and convector
Table 20 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 supply
temperature dial knob.
4
3
2
1
Fig. 48 Switch on heat
If the burner is operating, the burner operation indicator lamp is
illuminated.
8.4

Setting the DHW temperature

▶ Setting the DHW temperature on the DHW thermostat
The set DHW temperature flashes on the display for 30 seconds.
3 4
2 5
1 6
max
Fig. 49 Setting the DHW temperature
DHW thermostat
min
e
max
Table 21 Hot water temperature
Commissioning | 37
Sample application
Frost protection
system
reset
eco
3 4
e
2
5
6 1 6
max min max
6 720 641 933-53.2O
reset
eco
4
3
2 e
1
6
max
6 720 641 933-55.1O
Display DHW temperature
approx. 104 °F (40 °C)
approx. 122 °F (50 °C)
approx. 140 °F (60 °C)
6720872361 (2017/04)