Baxi HP40-XX-MB Operation Manual page 14

Use the interface to turn on or off the unit for DHW.Press '' ► ''、 ''▼''on home
page,the black cursor will appear:
2）When the cursor is on DHW operation mode. Press
the DHW mode.
If the space operation is ON,the following pages will display:
If the space operation mode is OFF,the following pages will display:
12
key to turn on/off