Nibe VVM 320 - Page 50

Set the hot water circulation for up to three periods per day here. During the set
periods the hot water circulation pump will run according to the settings above.
"operating time" decide how long the hot water circulation pump must run per
operating instance.
"downtime" decide how long the hot water circulation pump must be stationary
between operating instances.
NIBE VVM 320Chapter 3 | VVM 320 – at your service50