Replacing The Heat Exchanger; Replacing The Condense Trap And Siphonic Drain - Vaillant eco TEC plus 415 Instructions Manual

Note!
The ecoTEC plus 428 and 438 fan is secured
through an extension piece with two securing
screws, check and replace any seals or gaskets
if necessary.
11.5

Replacing the heat exchanger

For access refer to section 8.1.4.
Remove the gas valve, fan and burner refer to the
relevant parts of section 8.1.6.
Drain the boiler.
Remove the clip securing the clear condense pipe to
heat exchanger.
Pull to remove clamps (two at the top and one at the
bottom) to remove the heat exchanger, see fig 11.2.
Note!
There will be water in the heat exchanger.
Remove clear condense pipe connector from bottom of
heat exchanger.
11.6 Replacing the condense trap and siphonic
drain
Refer to fig 11.3.
Remove the clips securing the flexible tubes to the
adapter by twisting the clips slightly to disengage the
clip jaws from each other.
Remove flexible tubes from adapter.
Lift off the adapter.
Remove the drain connection downstream of the
condense trap.
Remove the two condense trap securing screws.
Lift up and carefully remove the condense trap taking
care not to spill any water which may be left in the
unit. As the unit is lifted remove the flexible pipe on
the outlet.
Remove any solids found.
Before removing the float note it's orientation.
Remove the float to clean it.
Flush water through the trap to remove any remaining
solids.
Check for any debris in the outlet pipe of the
condensate drain and clean as necessary.
Reassemble and refit the condense trap.
Note!
If a replacement trap is required remove
spigot bung before fitting condensate drain
connection.
Using a suitable container, flush the heat exchanger
until the water appears clear in the container.
Reassemble adapter.
Installation and Servicing ecoTEC plus
Supplied by HeatingSpares247.com
Parts replacement 11
GAS
MANIFOLD
SECURING
SCREW
(2 OFF)
FAN
VENTURI
PLATE
SECURING
SCREW
(3 OFF)
Fig. 11.1 Fan removal
FLOW AND RETURN PIPES
SECURING SCREWS
AND CLAMPS
(3 OFF)
HEAT EXCHANGER
Fig. 11.2 Heat exchanger removal
GAS
CONTROL
VALVE
45