Filling The Condensate Siphon; Adjusting The Pumping Capacity; Adjusting The By-Pass; Checking The Gas Setting - Vaillant ecoTEC SERIES Instructions For Installation And Servicing

5 Commissioning Part I
5.6

Filling the condensate siphon

Fig. 5.4 Filling the condensate siphon
Danger!
Note that if the boiler is run with an empty
condensate trap there is a danger that fumes
might escape into the room and cause
poisoning. For this reason, it is important to
ensure that the trap is topped up each time the
unit is cleaned.
• Remove the lower part (1) of the condensate siphon by
turning the bayonet catch in anticlockwise direction.
• Fill the lower part with water until about 10 mm below
the upper edge.
• Refit the lower part of the condensate siphon.
5.7

Adjusting the pumping capacity

Only in ecoTEC plus boilers:
The capacity of the two-stage pump can be adjusted to
the requirements of the heating system. If needed,
change the setting of the operating mode dependent
pump speed under the diagnostic number "d.19" (see
section 8.1.2).
5.8

Adjusting the by-pass

The appliances have an adjustable by-pass valve.
The pressure can be adjusted between 170 and
350 mbar. Approx. 250 mbar is preset (mid-position).
The pressure changes by approx. 10 mbar each time the
adjusting screw is rotated. By turning right, the pressure
increases and turning left decreases it.
34
1
Fig. 5.5 Adjusting the by-pass valve (in combination boilers)
1
1
Fig. 5.6 Adjusting the by-pass valve (in system boilers)
• Regulating the by-pass on the adjusting screw (1).
5.9

Checking the gas setting

Caution!
Malfunctions or reduction in working life of the
boiler!
If the boiler version does not correspond to the
local gas family, there will be malfunctions or
you have to change components of the boiler
ahead of schedule, e. g. do not use a LPG boiler
on natural gas.
• Before starting up the boiler compare the
details of the type of gas specified on the
identification plate with the type of gas
supplied at the installation site.
Instructions for installation and servicing ecoTEC 839592_12