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

5.1.2

Initial Lighting

The lighting procedure of the boiler is fully automated.
To prepare the boiler for initial lighting first ensure that
all external controls are not calling for heat.
• For access open the front flap by pulling at the centre
of the case strip.
• Turn on the appliance at control (1), see fig 5.4. When
you turn on the appliance, the current operating status
appears in the display (2), see fig 5.4.
• Adjust the control (1) anti-clockwise to its lowest setting
(The indent position just before off).
• Turn on external heat demand to boiler. The fan
should start and after a few seconds the ignition will
commence.
• Turn domestic hot water control knob (4) to max if
accessory VR 65 is fitted.
4
1
3
Fig. 5.4 Switching on the appliance
h Note!
Allow the boiler to run on minimum until com-
missioning is complete.
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?
a Caution!
Inappropriate modifications can cause damage.
If your boiler still does not operate then please
consult the trouble shooting section of this lit-
erature.
5.1.3

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.
Instructions for installation and servicing ecoTEC plus / 0020020828_05
• 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.
5.1.4

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.
2
5.1.5

Testing - gas

The boiler is supplied ready adjusted and no further gas
adjustments are necessary, however both the gas inlet
working pressure and the maximum gas rate should be
checked at least 10 minutes after the burner has lit, see
table 5.1. The gas inlet working pressure can be checked
at the pressure test point on the gas valve (fig 5.3.). The
gas inlet working pressure should be between 17 mbar
to 25 mbar when the boiler is firing at full rate, refer
section 9. After testing the inlet pressure remove the U
gauge, tighten the sealing screw and test for soundness.
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.
Caution!
a
If the measured gas flow volume lies outside
the tolerance limits specified in Table 5.1,
*do not operate the appliance and inform the
Vaillant Customer Service.
Model Max. nett
heat input
(kW)
415 15.26
418 18.90
428 28.60
438 38.35
Table 5.1
Commissioning (Part I) 5
and and the fault
Gas Rate
Natural gas (m 3 /h) Propane (kg/h)
nom. +5% –5% nom.
1.62 1.70 1.54 1.19
2.00 2.10 1.90 1.47
3.03 3.18 2.88 2.22
4.06 4.26 3.86 2.98
+5% –5%
1.25 1.13
1.54 1.40
2.33 2.11
3.13 2.83
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