Vaillant ecoMAX 665 Installation And Maintenance Manual - page 29
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Installation and maintenance manual ecoMAX 665
• Put back on the cable (8) at the fan motor (coupling),
the PWM signal cable beneath the fan (9) and the
cable for the gas fitting (11).
• Open the gas supply to the device.
Danger!
Check the gas connection (10) for leaks with
leak spray.
7.2.2 Clean the integral condensation heat
exchanger
Caution!
Protect the lowered electronics box against
spray water.
• Dismantle the compact thermo module as described
under 7.2.1.
• Clean the heating spiral (1) of the integral condensa-
tion heat exchanger (2) using regular vinegar essence
(fig. 7.3). Rinse with water.
• After an action time of approx. 20 minutes, remove
the dirt particles that have come loose with a soft
plastic brush. The condensate pipe must also be
entirely free of dirt.
2
1
Fig. 7.3 Cleaning the integral condensation heat exchanger
Note!
When the primary heat exchanger is cleaned,
the condensate path and the siphon should also
be cleaned, see chapter 7.2.3.
The connection elbow and the corrugated pipe
can be used to help you in rinsing out the pri-
mary heat exchanger. Remove these from the
siphon (2, fig. 7.4) and leave the clips and con-
nection elbow on the primary heat exchanger.
7.2.3 Cleaning the condensate paths and siphon
To clean the condensate paths, the condensate hose
can be dismounted from the primary heat exchanger
(1, fig. 7.4) and the complete condensate siphon (2)
dismounted. Then both can be cleaned in a disassembled
state.
Observe also the siphon installation instructions
provided.
1
2
Fig. 7.4 Cleaning the condensate paths (1)
Danger!
If the appliance is operated with an empty con-
densate siphon, there is the danger of poisoning
through escaping flue gases. Therefore, refill
the siphon after each cleaning.
• Dismount the seal water cartridge beneath the appli-
ance and clean it.
• Remove the clips beneath the primary heat exchanger
and pull off the connection elbow.
• Dismount the siphon and the corrugated pipe (con-
sider the position of the latches).
• Clean the components.
Caution!
Make sure that no spray water comes into con-
tact with other components. If it does, damage
may be caused.
Inspection and maintenance 7