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Heatronic boiler control settings
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 58).
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).
58
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 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.
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)).
Service function 3.d: Minimum output (heating and DHW)
The output for heating and DHW can be set to any level in percent
between the minimum and maximum nominal output.
The default setting is the minimum nominal output (heating and DHW)
and varies according to appliance.
Service function 3.E: Cycle time, keeping DHW hot (only combi
boiler ZWB...-3A)
NOTICE:
System damage or boiler malfunction!
▶ Never change the setting of this service function on heating boiler
ZBR...-3A appliances.
This service function is only active in comfort mode.
It specifies the time from completion of preheating or DHW demand until
the next time the plate-type heat exchanger is heated up. This prevents
the plate-type heat exchanger from overheating.
The cycle time can be set from 20 to 60 minutes.
Default setting is 20 (20 minutes).
Greenstar – 6721822579 (2020/03)
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