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Main features
These storage cylinders are available in two
versions, i.e. l and I/PC, the latter featuring
cathodic protection.
Each of these versions includes cylinders of the
following capacities: 60, 100, 150, 200, 300 and
500 litres.
l versión
These are Domestic Hot Water storage cylinders
with double casing. The domestic hot water
storage vessel (i. e. inner tank) is constructed
from stainless steel.
An electric heater element may optionally be
installed in the primary circuit so that when
operating in the "Summer" mode, hot water can
still be obtained with no need to start up the boiler.
A cathodic protection system may be fitted.
– Depending on the cylinder type.
Important
Do not use this version in installations with a
concentration of chlorides in the water in excess
of 350 mg/litre.
l/PC version
They feature the same characteristics as the
"I" version but differ by incorporating cathodic
pro-tection system guarding the cylinder against
co-rrosion. They are ideally suited for waters with
a concentration of chlorides in excess of 350 mg/l
This protection of the secondary circuit is provided
by a titanium anode which introduces the
necessary electric current to prevent corrosion.
This current is constantly being monitored by
the potentiostat measuring the actual potential
required.
Technical data
See Fig. 1.
Max. working pressure of the central heating
circuit: 3 bar.
Max. working pressure of the Domestic Hot Water
circuit: 8 bar.
Delivery
A single package contains all the necessary
accessories corresponding to the l or l/PC version.
The FLEXBRANE safety unit is only delivered with
60, 100 and 150 litre cylinders.
lnstallation and assembly
Cylinders of 60, 100 and 150 litre capacity may
be installed in four arrangements listed below:
– Vertical free-standing. See Fig. 3.
– Vertical wall-mounting, with the Domestic Hot
Water connections pointing up. See Fig. 4. lt
cannot be installed with the Domestic Hot Water
connections pointing down.
– Horizontal wall-mounting with the Domestic Hot
Water connections pointing to the right. See
Fig.5.
– Horizontal wall-mounting with the Domestic Hot
Water connections pointing to the left. See Fig.
6. In this position, the connection plate should
be turned 180° so that the hot drawoff pipe (1)
remains at the top (it is the longer of the two).
To turn the connection plate correctly, first lift
off the lid (20), the plastic glands (21) and undo
the 8 screws (22) which hold the plate (23) in
place. See Figs. 7 and 8.
For wall-mounting, use the brackets supplied with
the cylinder. See Fig. 9.
Cylinders of 200, 300 and 500 litre capacity are
usually installed vertically, Le. free standing.
See Fig. 10. Nevertheless, they can also be
placed on the floor horizontally. lf the latter
case applies, please follow the instructions for
horizontal connections laid down in the preceding
paragraph.
6
Water connections
lt is advisable to install non-conductive sockets
between the Domestic Hot Water inlet and outlet
pipes and the cylinder connections.
Appendix 1 shows the recommended water
diagrams in accordance with your needs.
Once the cylinder has been connected to the
system pipes, the filling procedure should be
as follows:
Filling
First filI the secondary circuit (Domestic Hot
Water) and follow with filling the primary circuit
(Central Heating).
If the electric element inside the storage tank is
used to heat the DHW, then the primary circuit
must be filled with water.
Draining
First empty the primary circuit (Central Heating)
and then the secondary circuit (Domestic Hot
Water).
Important:
Unless the above filling and draining procedures
are strictly observed, the storage cylinder may be
seriously damaged.
Once both circuits have been filled with water,
bleed the air in them. The storage cylinders incor-
porate an air vent (5) through which the air in the
cylinder primary can be removed. See Fig. 11.
Warning:
In accordance with current regulations, lowing
valves must be fitted at the mains water inlet
entering the cylinder:
– Shut-off valve
– Check valve
– Secondary Set Pressure Relief valve.
lt is advisable to install a FLEXBRANE safety unit
(See Fig. 12), which incorporates the above-listed
valves. The fitting instruction for this safety unit is
included in itspacking.
Safety untits can release according to the
pressure at frequent increase in the secondary
circuit; for this reason its discharge outlet should
be routed to a drain, as called for under current
regulations.
However, if this regular dripping is to be avoided,
it is advisable to install a Domestic Hot Water
expansion vessel (VASOFLEX/S) between the
storage cylinder and the FLEXBRANE safety
unit. See Fig. 13.
Should it be necessary to recirculate the Domestic
Hot Water, th e pipe must then be connected to
the cold water inlet between the FLEXBRANE
safety unit and the storage cylinder. See Fig. 14.
This recirculation pipe should include a non-return
valve and a suitable pump.
Electrical connections Appendix 2 shows the
wiring diagrams for the connections between
these storage cylinders and the boilers.
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The wiring should be laid via the inside of the
cylinder casing. See Figs. 15 and 16. To do this,
please proceed as follows:
– Unscrew the control panel (19).
– Remove the top moulding (PVC Cover) (6).
– Pass the cables through the knockout (24) in the
cover, through the cable clamp (25) and through
the plastic tube (26) which leads to the control
panel area.
– Make the electrical connections in accordance
with the wiring diagrazms in Appendix 2.
– Ensure that the bulbs of thermostat (27) and
thermometer (28) are introduced fully home
into their pockets. In the l/PC version, check
that connections (29) are properly wired.
– Screw back the control panel and the top
moulding (PVC cover).
lmportant Notes on the I/PC version
– Connect the potentiostat (30) to a power supply
of 220/230V ~ 50Hz.
– An occasional power tripping of the cathodic
protection system implies the risk of corrosion
and loss of warranty rights.
– Use the original cables only. Do not lengthen
or shorten them, as this may lead to corrosion
problems
– The sacrificial anode works when the storage
cylinder is full of water. When the anode is not
completely immersed, the control LED (31) wi
ll flash in red. lf the LED is not lit or flashing in
red but the cylinder is full of water, check the
connections, contacts and mains power supply.
Should the fault continue to exist, call your
lnstaller.
– When the control LED (31) is "green", it
indicates that the cylinder is being pr otected
by the system,
– In vertically-installed cylinders, if no water is to
be tapped for periods of 3 months or more, it
would be advisable to install an automatic air
vent on the Domestic Hot Water outlet.
– In horizontally-installed cylinders, it is advisable
to tap water at least once every 3 months.
CE Marking
BAXI 's storage cylinders comply with the
European Directives on Electromagnetic
Compatibility 89/336/EEC and 73/23/EEC
on Low Voltage.
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