Victorum Exhaust Air Heat Pump Installation Guide
57
Victorum Compact
Mains/boosted cold supply
Boosted cold supply Outlet
Potable Expansion Vessel
Potable Expansion Vessel
The expansion vessel receives the increased
water volume when expansion takes place as
the system heats up and it maintains a positive
pressure in the system. The expansion vessel
contains a flexible diaphragm, which is initially
charged on one side with nitrogen, but can
be topped up with air when required. Select a
suitable position for the expansion vessel. Mount
it to the wall using the bracket provided (0-24L
only, 35L and above are floor standing) and hard
fix into pipework and insulate. Ensure that the top
of the vessel is accessible for servicing. The pipe
connecting the expansion vessel to the system
should have a diameter of not less than 15mm
and must not contain any restrictions.
Commissioning
Filling the Potable System
Before beginning to fill the hot water tank, the 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 valve is of the Schrader car tyre type. 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.
Piping
Hot Water Outlet
Potable Expansion Vessel
