Nibe VPB S Manual page 16

Hard water areas
Normally, there should not normally be any problem in-
stalling VPB S/ VPBS S in hard water areas, as the oper-
ating temperature is 50–60°C.
Cleaning the climate system
When the water heater and the climate system have
been filled with water, VPB S/ VPBS S must operate at
maximum normal temperature for at least one hour.
Thereafter the system must be drained of water and
refilled.
Before installing the heat pump in an existing system,
it is important that the system is properly flushed
through.
Even if the heat pump is to be installed in a new system,
the heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed
from the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term
anti-corrosion protection.
NIBE Energy Systems Limited recommends water
treatments (supplied by e.g. Fernox and Sentinel) spe-
cifically designed for heat pumps.
SYSTEM DIAGRAM
VPB S/ VPBS S is a series of water heaters that are
suitable for connection to e.g. a heat pump.
VPB S/ VPBS S consists of a hot water tank with internal
anti-corrosion protection made of copper, stainless steel
or enamel, as well as a charge coil
The charge coil heats the domestic water, resulting in
excellent properties for hot water charging.
VPBS S300 has an additional coil, which is used for an
external heat source, e.g. thermal solar panels or a stove
with a back boiler.
16 Chapter 3 | For the Installer
PIPE CONNECTIONS
VPB S300
XL8 XL4 XL5
XL29
VPBS S300
XL13 XL8 XL4 XL5
XL29
Connection
XL3 Cold water Ø
XL4 Hot water Ø
XL5 Hot water circulation Ø
XL8 Docking connection, supply line Ø
XL9 Docking connection, return line Ø
XL13 Solar heat connection, supply Ø
XL14 Solar heat connection, return Ø
XL29 T&P valve Ø
T&P VALVE
Install the pipe for the T&P valve as illustrated below.
XL3 XL9
XL3 XL9 XL14
mm 22
mm 22
mm 15
mm 22
mm 22
mm 22
mm 22
mm 15
NIBE VPB S/ VPBS S