GENERAL DESIGN CONSIDERATIONS
T h e m i n i m u m c u p b o a r d w i d t h t o
accommodate the Xstream is 700mm.
The base chosen for the cylinder should be
level and capable of supporting the weight
of the unit when full of water as shown in
General Data. The discharge pipework for the
safety valves must have a minimum fall of 1 :
200 from the unit to a safe discharge point. All
exposed pipework should be insulated and the
unit should NOT be fixed in a location where
the contents could freeze.
The pipe connecting the boiler flow to the
appliance must not be less than 22mm
copper or equivalent.
There should be no valves or other
equipment in the pipe connecting the
boiler flow to the appliance.
MAINS WATER SUPPLY
Existing properties with a 15mm supply will
be satisfactory provided the local mains
pressure is good, but should be confined
to single bathroom properties. For new
properties where simultaneous demand is
required to more than one bathroom or a
bathroom and one or more en-suites, the
communication and service pipe into the
dwelling should be a minimum of 22mm
(usually in the form of a 25mm MDPE supply).
The minimum recommended static pressure to
operate an Xstream domestic system is 2 bar.
There should be a flow of at least 25 litres per
minute or above available into the property.
Normally Xstream provides well in excess of
30 litres/min in most conditions. Flow rates
for ALL mains pressure systems are subject to
district pressures and system dynamic loss.
GENERAL RESTRICTIONS
a. The highest hot or cold water draw off
point should not exceed 4 metres above
the Pressure Reducing Valve.
b. An ascending spray type bidet or any other
appliance with a Class 1 back-syphonage
risk requiring a type A air gap should not
be used.
c. Xstream should not be used where steam
is the primary heating medium, or in a
situation where maintenance is likely to
be neglected.
d. Unvented cylinders are not suitable for use
with solid fuel boilers.
min 600 mm opening
700 mm minimum internal cupboard width
600 mm
minimum
internal
cupboard
depth
If two Xstreams are coupled together the secondary inlet and outlet pipes must be balanced.
The units must be fitted on the same level.
Cupboard depth of 600mm will allow 200mm in front
of the unit to fit all valves and pumps for easy maintenance
190
mm
Page 8
INSTALLATION
