FLOWTECH Flowpress Mini Single Operation And Maintenance Manual page 15

6. The flexible hose and any wiring can be retained in the desired position using cable ties
and the two metal cable retention points on the top left and right of the Flowpress Mini tank.
See Figs. 8 & 9.
7. The warning pipe should be connected to a suitable drain via a tundish enabling visual
warning of an overflow condition. The overflow fitting is designed to use 19 to 23 mm
diameter plastic waste pipe or connect to G ¾ threaded pipe. Ensure there is a demountable
joint in the pipe to allow the removal of the Flowpress Mini if needed.
8. Non-return valves, pressure reducing valves and RPZ valves MUST NOT be installed
between the Flowpress Mini and the heating/cooling system. These devices will prevent the
pressure sensor from reading the system pressure and will lead to incorrect operation of the
unit.
9. The Flowpress Mini should be connected to the system return header along with the
expansion vessels as specified in BS 7074. See Fig. 10.
4.17 Vessel sizing & location:
1. System expansion vessel sizing should comply with the BS 7074 Expansion
Vessel sizing calculation.
2. The pressurisation unit and expansion vessels should be connected to the
system at the same point, to provide a neutral pressure reading.
3. A lockshield valve and drain valve should be installed at the inlet of each
expansion vessel to allow for servicing.
flowpress
Mini Digital Pressurisation Unit