Pipe Connections - Nibe ELK 15 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 approved 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 drainage
valve at the lowest point on the pipe installation. The
remaining water in ELK 15 is drained through the return
line connection (XL2), see "Component location" on page
16. If the return line connection on ELK 15 is normally
used for draining the unit, a drain valve can be installed
here.
Pressure drop diagram ELK 15
(kPa)
(kPa)
2,5
2,0
1,5
1,0
0,5
0
0 0,1 0,2 0,3
ELK 15 | GB
0,4 0,7
0,5 0,6
(l/s)
Flow (l/s)
17