Danfoss 4033 Installation And User Instructions Manual page 11

WATER switch
TIMED - the Hot Water will be switched ON and OFF
according to the times at which the tappets have been set.
OFF - the Hot Water will ignore the tappet positions
and remain OFF.
ON - the Hot Water will be ON constantly. This enables
you to switch the Hot Water ON during a period when
the time clock is off, enabling you to have constant hot
water.
11