Bosch Greenstar combi 100 p Installation And Service Instructions For Contractors page 41

▶ Record the set DHW output in the commissioning log ( page 60).
▶ Exit the service functions.
The display returns to the supply temperature.
The factory setting is the maximum nominal output: U0 (100 %).
Service function 1.E: Pump mode for space heating operation
If an outdoor temperature sensor for an outdoor reset control is
connected, pump control mode 04 is automatically set.
• Pump control mode 00 (automatic mode): The BUS control
controls the central heating pump.
• Pump control mode 01: For heating systems without control. When
there is a demand for heat, the central heating pump and the burner
start up.
• Pump control mode 02: Do not use.
• Pump control mode 03: The central heating pump runs continuously
(exceptions: See heating control operating instructions).
• Pump control mode 04: Intelligent control of central heating pump
in heating systems with outdoor reset control. The heating zone
pump is only switched on when needed.
Default setting is 00.
Service function 1.F is not used
NOTICE:
System damage or boiler malfunction!
▶ Never change the setting of this service function on combi boiler
ZWB..-3A appliances.
Service function 2.C: Purging function
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.
This service function allows activating the purging function manually,
e.g. after servicing.
The following settings are available:
• 00: Purging function off
• 01: Purging function is switched on and after completion
automatically reset to 00
• 02: Purging function is permanently on and is not reset to 00
Default setting is 01.
Greenstar combi 100 p / 151 p
Heatronic boiler control settings | 41
Service function 2.d: Thermal disinfection (legionella protection)
WARNING:
Danger of scalding!
Hot water can scald.
▶ Carry out thermal disinfection only outside the normal hours of use.
▶ Install a tempering valve if running at water temperatures above
104 °F (40 °C).
When this service function is enabled, the DHW is permanently heated
to approx. 158 °F (70 °C) if the DHW temperature dial has been turned
clockwise to max.
The following settings are available:
• 00: Thermal disinfection not enabled
• 01: Thermal disinfection enabled
Default setting is 00 (disabled).
Service function 2.F: Operating mode
With this service function, you can temporarily change the appliance's
operating mode.
The following settings are available:
• 00: Default mode; the appliance runs according to control settings.
• 01: The appliance runs for 15 minutes at minimum output. The
display shows 2.F. When this service function is aborted or has been
active for 15 minutes, the appliance reverts to default mode.
• 02: The appliance runs for 15 minutes at maximum output. The
display shows 2.F. When this service function is aborted or has been
active for 15 minutes, the appliance reverts to default mode.
Default setting is 00.
Service function 3.A: Automatic anti-cycle function
If an outdoor reset control is connected, there is no need to adjust this
setting on the appliance.
The control automatically optimizes the anti-cycle time.
Use service function 3.A to set the automatic adaptation of the anti-cycle
time. This can be required in case of unfavorably-dimensioned heating
systems. Short cycling may increase boiler and system wear and tear,
increase emissions, reduce comfort, and should be avoided.With auto-
adaptation of the anti-cycle time disabled, the anti-cycle time must be
set using service function 3.b ( page 42).
The following settings are available:
• 00: Automatic adaptation of the anti-cycle time is disabled
• 01: Automatic adaptation of the anti-cycle time is enabled
Default setting is 00 (switched off).
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