Heatronic boiler control settings
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
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between 01 - 24 (10 - 240) seconds according to the manufacturer's
documentation.
Default setting is 24 (240 seconds).
Service function 2.b: Maximum supply temperature
The values of this service function displayed depend on the setting of the
service function 0.E:
Service function 0.E is set to 00 (metric units):
• The maximum supply temperature can be adjusted between 35 and
86 (35 - 86 °C).
Service function 0.E is set to 01 (US customary units):
• The maximum supply temperature can be adjusted between 96 and
187 (96 - 187 °F).
Default setting is 190 (190 °F (88 °C)).
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 display shows in alternation with the supply temperature.
This service function allows activating the purging function manually,
e.g. after servicing.
The following settings are possible:
• 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 00 for heating boilers KBR..-3A, otherwise 01
Service function 2.d: Thermal disinfection (Legionella protection)
WARNING:
Risk of scalding!
Hot water can result in severe scalding.
▶ Carry out thermal disinfection only outside the normal hours of use.
▶ Install a tempering valve if this function is enabled permanently.
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 possible:
• 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 possible:
• 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 a 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.
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)
Service function 3.b:Set anti-cycle time
Only if the automatic anti-cycle time is disabled (service function 3.A)
will this function be active.
If a outdoor reset control is connected, there is no need to adjust this
setting on the appliance.
The control automatically optimizes the anti-cycle time.
The anti-cycle time can be set from 00 to 15 (0 to 15 minutes).
With 00, the anti-cycle lock is switched off.
The shortest possible switching interval is 1 minute (recommended for
single zone or forced air heating systems).
Default setting is 03.
Service function 3.C: Switching differential
Only if the automatic anti-cycle time is disabled (service function 3.A)
will this function be active.
If an outdoor reset control is connected, there is no need to adjust this
setting on the appliance.
The control automatically optimizes this setting.
The switching differential is the permitted boiler differential from the
target supply temperature. It can be set in increments of 1 °F (0.5 °C).
The minimum supply temperature is 95 °F (35 °C).
Service function 0.E is set to 00 (metric units):
• You can set the switching differential between 00 and 30 (0 - 30 °C).
Service function 0.E is set to 01 (US-customary units):
• You can set the switching differential between 00 and 54 (0 - 54 °F).
Default setting is 18 (18 °F (10 °C)).
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