Pipe Connections - Nibe ELK 26 Installateurhandbuch

Pipe connections

General
The pipe installation must be carried out in accordance
with applicable standards.
A circulation pump must be used to ensure the flow
over the immersion heater. If the heating system valves
can close the circulation completely, the bypass valve
must be installed so that the flow through the electric
heater does not stop. In closed installations an ap-
proved safety valve and pressure expansion vessel must
be used.
Caution
Also see the installer manual for your heat
pump/indoor module.
NOTE
The pipe work must be flushed before the
electric heater is connected, so that any con-
taminants do not damage the component
parts.
Draining
The system is most easily drained by installing a drain-
age valve at the lowest point on the pipe installation.
The remaining water in ELK 26 is drained through the
return line connection (XL2), see "Component location"
on page 12. If the return line connection on ELK 26 is
normally used for draining the unit, a drain valve can
be installed here.
Pressure drop diagram ELK 26
kPa
6
5
4
3
2
1
0
0 500 1000 1500 2000
Flow
l/h
2500 3000 3500 4000
GB
13