Install Instructions

60 | Heatronic boiler control settings
Greenstar6 720 806 992 (2013/09)
Service function 2.A: Heating circuit pump lockout time (only
heating boiler ZBR..-3A)
During the runtime of an external 3-way valve actuator, the space
heating pump is blocked. Select the run time of the 3-way valve actuator
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
88 (35 - 88 °C).
Service function 0.E is set to 01 (US customary units):
• The maximum supply temperature can be adjusted between 96 and
190 (96 - 190 °F).
Default setting is 190 (190 °F (88 °C)).
Service function 2.C: Purging function
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 ZBR..-3A appliances, otherwise
01.
Service function 2.d: Thermal disinfection (legionella protection)
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
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 61).
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).
NOTICE: System damage or boiler malfunction!
▶ Never change the setting of this service function on
combi boiler ZWB..-3A appliances.
This setting is only active if Service function
1. F: Pump mode is set to 01 (3-way valve).
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.
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.
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.