GENERAL INSTALLATION
COLD MAINS PIPEWORK
Run the cold main through the building to the place where
the STAINLESS UV is to be installed. Take care not to run
the cold pipe near hot water or heating pipework so that the
heat pick-up is minimized. Identify the cold water supply pipe
and fit an isolating valve (not supplied).
A 22mm BS1010 stopcock can typically be used but a 22mm
quarter turn full bore valve would be better as it does not
restrict the flow as much. Do not use “screwdriver slot” or
similar valves. Make the connection to the cold feed of the
cylinder and incorporate a drain valve. Position the drain
valve no higher than the cold inlet to ensure sufficient
draining of cylinder when required. Position the inlet control
just ABOVE the Temperature & Pressure Relief Valve (TPRV)
mounted on the side of the cylinder. This ensures that
the cylinder does not have to be drained down in order to
service the inlet control set. Ensure that the arrow points
in the direction of the water flow. Select a suitable position
for the expansion vessel. Mount it to the wall using the
bracket attached to the vessel. Use suitable fittings capable
of supporting full vessel weight (and with appropriate
consideration to wall material). Ensure the pre-charge in
the vessel is set at 3 Bar. Connect the expansion vessel to
the cold feed pipework between the inlet control set and the
cold inlet on the cylinder. Ensure that the top of the vessel is
accessible for servicing.
CONNECTING TO THE CYLINDER
All of the pipework connections on the cylinder are 22mm
compression and supplied complete with gland nuts and
olives, in the Accessory Kit box. Only connect 22mm Table X
copper tube to these connections.
Cut the tube with a pipe cutter and ensure no sharp edges or
burrs protrude. Slide both gland nut and olive onto the tube
and push tube fully home into the connection, ensuring the
tube end fully bottoms on the connection recess. Smear the
outer wall of the olive with plumbing paste and tighten gland
nut in the prescribed manner. Upon filling/commissioning,
ensure all connections are completely watertight. Note:
No control or isolation valve should be fitted between the
expansion relief valve and the storage cylinder. The relief
valve connections should not be used for any other purpose.
(expansion vessel not to scale)
Turn to
test
Cold
Mains In
Balanced Cold
Connection
Outlet to Cylinder
Expansion
Relief to
Tundish
Expansion
Relief
Connection
05
STAINLESS UV
UNVENTED HOT WATER CYLINDERS
