User Guide
Table Of Contents
- Contents
- 1 Key to symbols and safety instructions
- 1.1 Key to symbols
- 1.2 Safety instructions
- 2 Information about the appliance
- 3 Preparing the appliance for operation
- 4 Operation
- 4.1 Overview of controls
- 4.2 Switching the appliance ON/OFF
- 4.3 Turning the space heating ON
- 4.4 Programming the heating control unit
- 4.5 ZBR..-3A appliances with DHW tank: Setting the DHW temperature
- 4.6 ZWB..-3A appliances (combi boilers): Setting the DHW temperature
- 4.7 Setting manual summer mode
- 4.8 Setting frost protection
- 4.9 Activating the key pad lock
- 4.10 Display codes
- 5 Thermal disinfection
- 6 Energy saving tips
- 7 Troubleshooting
- 8 Maintenance
- 9 Environmental responsibility/disposal
- 10 Quick reference
- Index
Operation | 19
6 720 806 993 (2013/03)
Greenstar
ECO button
Pressing and holding the ECO button until it lights up switches between Comfort
mode and Economy mode.
• Comfort mode (default setting)
The appliance is continually maintained at the set temperature. Consequently,
DHW draws are immediate, however the appliance may run even if no DHW is
being drawn.
• Economy mode, ECO button lights up
– DHW is only generated when DHW is drawn.
– On demand: Quickly open and close a DHW tap to signal the appliance to heat
to the selected temperature. After a short wait DHW will be available.
4.7 Setting manual summer mode
In summer mode or warm weather shut down (WWSD), the heating zone pump and
consequently central heating are switched off. DHW generation remains active
following the DHW program.
▶ Make a note of the setting of the boiler high limit dial .
The DHW on demand signal allows maximum gas and water savings.
NOTICE: Heating system at risk of freezing. In manual summer
mode, only the appliance is protected from freezing.
▶ Observe frost protection measures where there is a risk of
freezing ( page 20).