Nibe VPB Series User's And Installer's Manual page 11

HEAT PUMP
The heat pump's supply and return are connected to
XL8 and XL9 on VPB/VPBS.
SUN
The solar heating system's supply and return are con-
nected to XL13 and XL14 on VPBS 300.
VPB/VPBS
COLD AND HOT WATER
Cold and hot water are connected to XL3 and XL4 on
VPB/VPBS. There must be a mixer valve if the temper-
ature can exceed 60°C.
CONNECTING HOT WATER CIRCULATION
VPB/VPBS R and E have a connection that allows hot
water circulation, and are connected to XL5 and XL4.
To reduce the risk of bacterial growth in systems with
hot water circulation, the temperature of the circulating
water should not fall below 50 °C. There should not be
any non-circulatory hot water pipes either. Adjust the
hot water system so that the temperature does not fall
below 50 °C in the periphery of the system.
Chapter 3 | For the Installer 11