Technical information

13
For Classico HE STD and
STI 500 models
28mm COLD
MAINS IN
28mm TO
CYLINDER
SERVICEABLE 1” PRESSURE REDUCING
CARTRIDGE AND LINE STRAINER
(SET AT 3.5 BAR)
3/4” B.S.P. CONNECTION
FOR EXPANSION VESSEL
EXPANSION RELIEF VALVE
(SET AT 6 BAR)
1” BALANCED COLD WATER TAKE OFF
WITH NON-RETURN VALVE

It is recommended that a 22mm pipe run should supply the outlets
throughout the building, especially to baths and showers. Short runs of
15mm pipe may be used to connect basins and sinks.
On selected floor-standing models a secondary return may be fitted (consult
the drawings on pages 10 and 11 and the label on the face of the unit for
presence/location). A non-return valve (not supplied) must be fitted to
prevent back flow and a bronze pump will be needed in conjunction with a
pipe thermostat and timer to circulate the hot water (both not supplied).
Where a secondary return is not included on the cylinder, it is possible to
utilise the mains inlet (see diagram below).
!& an extra expansion vessel may be required where the additional
volume of the secondary return exceeds the capacity of the expansion
vessel supplied.
 ! &! &! %$(%
 %! $+ $&'$