www.jouleuk.co.uk | www.joule.ie
38
Victorum PrePlumb
Piping
Secondary Circulation
On larger installations long pipe runs to draw-off
points can cause significant volumes of water to
be drawn off before an acceptable temperature
can be reached. Secondary pumped circulation
using a stainless steel or a bronze pump and
combined with effective time and temperature
controls can overcome this problem. Where
secondary return circulation is required the
pipework should be run in 15mm pipe and the
pipework must be insulated to prevent excessive
heat loss, leading to high running costs. A check
valve must also be installed to prevent back flow.
The secondary circulation tank connection can
be seen ‘in the diagram shown here.
Commissioning
Filling the Potable System
Before beginning to fill the hot water tank, the precharge pressure in the potable expansion vessel
must be checked to verify it is 0.3 bar below the inlet group setting ex. 3 bar inlet = 2.7 vessel. The
pre-charge pressure can be adjusted by the Schrader Valve located on the vessel.. The adjusting of
the presure should be done before the expansion vessel is installed - i.e the pipe connection must be
open to atmosphere.
Check all the connections for water tightness including any factory-made connections such as the
immersion heater and the temperature and pressure relief valve.
Prior to filling, open the hot tap furthest away from the cylinder to expel air. Open the cold main isolation
valve and allow the unit to fill. Once the cylinder has been fully commissioned it should be heated to its
normal operating temperature.
Heating System
Before beginning to fill the heating system ensure all components are installed and respect any
recommended direction of flow. Ensure all connections are water tight and sound.
It is recommended to check the pre-charge pressure of the heating expansion vessel before filling the
system and to adjust it if necessary.
Secondary Circulation
Connection Point
