27ecoTEC plus 937 installation and maintenance manual
4.16 Installing the pressure relief discharge
pipework
4
3
2
1
Fig. 4.13 Installing the discharge pipe
The pressure relief for the heating system is integrated
into the boiler.
• Remove the discharge pipe with union nut and rubber
washer from the box of accessories for the shift load
storage tank.
• Insert the rubber washer (1) into the union nut (2) and
screw the discharge (3) onto the pressure relief
valve (4).
• The discharge pipework should be as short as possible
with a continuous fall from the appliance.
• The discharge pipe should terminate in such a way
that nobody can be injured and no cable or other
electrical components can be damaged if water or
steam is discharged.
Please note that the end of the discharge pipe must
be visible.
h
Note!
We recommend that the discharge pipe for the
pressure relief valve is not shortened.
4.17 Storage tank pressure relief discharge
pipework
1
2
Fig. 4.14 Storage tank pressure relief discharge pipe
connection
The safety valve for the hot water system is integrated
in the shift load storage tank.
• Remove the flexible drain hose from the box of
accessories for the shift load storage tank.
• Push the drain hose (1) onto the safety valve (2).
The end of the drain hose can be directed via an open
connection to a tundish and terminated in a similar
manner to the boiler pressure relief discharge pipe.
4.18 Connecting the flue system to the
combination boiler
• Refer to the separate air/flue duct installation
instructions included with the appliance.
Sequence of operations during installation 4
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