21Installation and maintenance manual ecoTEC
ecoTEC pro
ba
r
1
2
3
4
5
Fig. 4.9 Heating flow and return connection for ecoTEC pro
• Insert a packing (1) and screw in the maintenance taps
(2) at the flow and return connection of the appliance.
• Insert a union nut (4) and a pinching ring (3) on the
two conduit elbows (5) with a diameter of 22 mm.
• Insert the conduit elbows until the stopper in the
maintenance taps. Tighten the union nuts in this posi-
tion.
ecoTEC plus, 600 series
1
2
3
4
5
Fig. 4.10 Heating-side flow and return connection for ecoTEC
plus, 600 series
• Insert a packing (1) and screw in the maintenance taps
(2) at the flow and return connection of the appliance.
• Insert a union nut (4) and a pinching ring (3) on both
conduit elbows (5). The diameter of the conduits is
22 mm.
• Insert the conduit elbows until the stopper in the
maintenance taps. Tighten the union nuts in this posi-
tion.
4.10.2 Drain pipe on the pressure control valve of the
heating system
1
2
3
Fig. 4.11 Installing the drain pipe on the pressure control valve
of the heating system (picture shows ecoTEC 800
plus)
The pressure control valve for the heating system is
integrated in the appliance.
• Insert the packing (1) and screw in the drain pipe (2)
on the pressure control valve.
The discharge pipework should be as short as possible
and installed continuously away from the boiler. The pipe
should terminate in a position which ensures that any
discharge of water or steam from the valve cannot cre-
ate a hazard to persons in or around the premises, or
cause damage to any electrical components or external
wiring, and the point of discharge should be
clearly visible.
Boiler installation sequence 4
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