Nibe VPB series User's And Installer's Manual page 14

T&P valve
Install the pipe for the T&P valve as illustrated below.
Heat pump
The heat pump's supply and return are connected to
XL8 and XL9 on VPB/VPBS.
XL8 XL4 XL3 XL9 XL5
Sun
The solar heating system's supply and return are connec-
ted to XL13 and XL14 on VPBS 300.
14 Chapter 3 | For the Installer
UA1
FR1
UA2
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 temperat-
ure can exceed 60°C.
Connecting hot water circulation
VPB/VPBS have a connection that allows hot water circu-
lation, 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.
Installation alternative
VPB/VPBS can be connected in several different ways,
one of which is shown here.
Further option information is available at
www.nibe.co.uk and in the respective assembly instruc-
tions for the heat pumps used.
To ground heat
VPB/VPBS can be docked with another heat source, for
example NIBE F1155.
VPB/VPBS