Stuart Turner Stuart SPU 130 Mini Installation, Operation & Maintenance Instructions Manual page 12

4.14 Pipework connections & guidelines:
1. Before connecting the SPU Mini to the system ensure that system flushing
has been performed correctly and all foreign matter, including pipe scale,
has been removed.
Note: Foreign material from the system coming into contact with the
expansion vessel bladder could cause premature failure of the expansion
vessel.
2. Isolating valves MUST be installed on the unit inlet and outlet, before
connection to the flexible hoses to allow the unit to be isolated if required.
The isolation valve on the outlet should be of a lockshield type. See
Fig. 10.
3. A drain valve must be fitted on the outlet of the SPU Mini before the
isolation valve. See Fig. 10.
4. The connection to the heating/chilling system is also made with the
supplied flexible hose and a 15 mm compression fitting. The hose is
made water tight with a sealing washer on assembly, nip tight to 4 to
5 Nm for water tight seal. (Do not overtighten).
5. The connection to the heating/chilling system can be made to the left
or right hand side by routing the flexible hose supplied as detailed below.
Fig. 8 Fig. 9
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Cable tie
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