ecoTEC plus 937 installation and maintenance manual24
4.12 Cold water supply and hot water outlet
a
Caution!
Ensure stress-free assembly of the connection
pipework to avoid leakages!
Caution!
Danger of damage to the isolation valves by
heat transfer!
If the final connections to the combi boiler are
made using soldered pipe connections, you
must be particularly careful not to damage the
isolation valves by heat transfer.
1
2
3
4
5
6
7
Fig. 4.7 Installing the cold water and hot water connections
h
Note!
Flush all foreign matter from the mains supply
before connecting to the appliance.
• Remove the two copper tails (5, 6) for water
connection, the cold water isolating valve (2) and the
union nut (4), olive (3) and fibre washers (1, 7) from
the packaging.
• Insert the fibre washer (1) and screw the cold water
isolating valve (2) to the cold water connection of the
shift load storage tank.
• Push the union nut (4) with the inserted olive (3) onto
the copper tail (5) included with the combi boiler. The
diameter of this pipe is 15 mm.
• Insert the copper tail into the cold water isolating
valve up to the stop. Tighten the union nuts in this
position.
• Insert the fibre washer (7) and screw the copper tail
(6) which is included with the storage tank module, to
the hot water connection on the unit. The diameter of
this pipe is 15 mm.
• Fit the handle for the filling loop to the cold water
isolation valve (2) with a countersunk screw.
4.13 Piping between shift load storage tank and
combination boiler
2
1
4
3
Fig 4.8 Piping between shift load storage tank and
combination boiler
• Remove the pipe sections (1), (2), (3) and (4) with the
associated fibre washers from the box of accessories
of the shift load storage tank.
• Fit the formed pipe and straight pipe sections in the
correct sequence.
h
Note
The formed pipes (1) and (2) must be fitted
first.
4.14 Flow and return heating connections
a
Caution!
Ensure stress-free assembly of the connection
pipework to avoid leakages!
Caution!
Danger of damage to the isolation valves by
heat transfer!
If the final connections to the combi boiler are
made using soldered pipe connections, you
must be particularly careful not to damage the
isolation valves by heat transfer.
h
Note!
Before connecting the heating circuit to the
combi boiler all pipework and radiators must be
thoroughly flushed out to remove all
contaminants.
4 Sequence of operations during installation
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