Ignition Problems; Flue Problems; Testing - Gas - Vaillant ecoTEC plus Instructions For Installation And Servicing

In the unlikely event that a problem occurs with the
operation of the ecoTEC boiler, the following points
should be checked:
Boiler fails to operate:
– Is the gas supply turned on?
– Is there enough water in the heating system?
– Is the electrical supply switched on?
– Is the control knob (1, fig 5.4) in the operating position?
– Is there an ignition problem?
Caution!
a
Inappropriate modifications can cause damage.
If your boiler still does not operate then please
consult the trouble shooting section of this lit-
erature.
5.1.4

Ignition problems

If the burner fails to ignite after five attempts, the device
does not start up and switches to "Fault". This is indicated
by the fault code "F.28" or "F.29" in the display. The
display also shows the flame symbol with a cross
through it (2), see fig 5.4. Automatic ignition can only
take place after you manually reset the fault.
• To reset the fault, press the reset button (3), see fig
5.4. and hold it down for one second.
a Caution!
If the boiler still shuts off after three attempts
of resetting, please consult the trouble shooting
section of this literature.
5.1.5

Flue problems

This appliance is fitted with a fan. If the fan does not
work properly, the appliance will switch itself off.
The display shows the symbols
message "F.32".
h Note!
If contacting Vaillant Service Solutions please
remember to quote the fault code, as this will
help to pinpoint the fault.
Nominal net
heat input as
Model
per BS EN 483
(kW)
415 15.26
418 18.90
428 28.60
438 38.35
Table 5.2 Gas Rate
Instructions for installation and servicing ecoTEC plus 0020020828_07
and and the fault
Natural gas
3
(m /h)
nom. +5%
1.62 1.70
2.00 2.10
3.03 3.18
4.06 4.26
Commissioning (Part I) 5
5.1.6

Testing - gas

The boiler is supplied ready adjusted and no further gas
adjustments are necessary.
h Note!
The burner pressure cannot be measured at the
gas valve due to the fan/burner design. Replace
the inner and front casing panels. Record
appliance working gas inlet pressure (mbar) in
Benchmark Installation, Commissioning and
Service log.
a Caution!
If the measured gas flow volume lies outside
the tolerance limits specified in Table 5.2,
*do not operate the appliance and inform the
Vaillant Customer Service.
Gas Rate
–5% nom.
1.54 1.19
1.90 1.47
2.88 2.22
3.86 2.98
Propane
(kg/h)
+5% –5%
1.25 1.13
1.54 1.40
2.33 2.11
3.13 2.83
29