Boss AX1-2.5E, Operation & Maintenance Manual

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5
Installation
This pressurisation unit is not designed to be installed in an outdoor environment. The
unit must be installed in a frost free environment, away from precipitation and water
sprays/jets. If there is a risk of flooding, the unit must be installed on a raised plinth.
Please refer to the appropriate datasheet for the maximum working pressure and
temperature of the pressurisation unit. The conditions at the point of connection to
the system must not exceed these values.
Pipe Connections
To avoid damaging the float valve, the mains water supply pipe must be flushed before
connection to the pressurisation unit.
All pipe connections must be made with appropriate jointing compound/PTFE tape.
If PTFE tape is used, care must be taken to ensure that the tape does not obstruct the
orifice of the fitting.
Non-return valves, pressure reducing valves and RPZ valves must not be installed
between the pressurisation unit and the heating/cooling system. These devices will
prevent the pressure sensor from reading the system pressure.
The pressurisation unit and expansion vessel should be connected to the system at the
same point, to provide a neutral pressure reading. This point of connection should be
in the system return, on the suction side of the circulation pump.
Typical Installation Diagram