05
EVERFLO uNVENTEd HOT WATER CyLINdERS
GENERAL INSTALLATION
COLd MAINS PIPEWORK
Run the cold main through the building to the place where the
EVERFLO 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
