Fitting The Variable Terminal Kit (Vtk); Scope Of Delivery; Assembling The Variable Terminal Kit Before Fitting The Flue Pipe - Vaillant Air/Flue Gas System Installation Manual

> Push the new terminal into the flue pipe so that it snaps
into place.
> Push the flue pipe together with the terminal back into
the air pipe.
> Carefully push the flue pipe back into the socket of the
pipe or elbow behind. Make sure the two lugs snap into
place (¬ fig. 3.21).
> Fit the wall seal.
Danger!
a
Risk of poisoning due to escaping flue
gas.
If the flue pipe is not properly fitted, flue
gas can escape.
> Before starting up the boiler, check that
all flue pipe joints are properly seated
and air-tight.
3.7 Fitting the variable terminal kit ( VTK)
Minimum clearances for flue terminal
The minimum clearances for the flue terminal as defined in
BS 5440 must be observed unless the boiler manufacturer
is permitted to use smaller clearances that are not consid-
ered safety-critical.
Vaillant has reduced the minimum clearances for the flue
terminal and specifies them in the boiler installation
instructions. Those clearances are minimum distances appli-
cable to all types of installation except to installation of the
variable terminal kit (VTK).
If a VTK is connected to a horizontal flue pipe, the terminal
clearances for the air inlet are smaller. The terminal clear-
ances for the "new" flue outlet at the end of the VTK are
unchanged.
For the VTK, the minimum clearance of air inlets A, B and C
from openings such as a window have been reduced to
150 mm. That means that the terminal on the horizontal
flue pipe becomes an air inlet when a VTK is connected and
thus can be installed at a distance of less than 300 mm
from a window opening or ventilation brick.
Installation Manual air/flue gas system for ecoTEC 834449_16
Concentric system (standard), dia. 60/100
3.7.1

Scope of delivery

3.22 Variable terminal kit
Contents of kit (art. no. 303942, black; art. no. 303946,
white):
– Variable terminal
– 2 x 1 m extension
– 3 x pipe brackets
– 87° elbow with bird-guard grille
3.7.2 Assembling the variable terminal kit before
fitting the flue pipe
b
Caution.
Risk of damage to the air pipe and appli-
ance.
If rain enters the air pipe, it may cause cor-
rosion of the air pipe and the appliance.
> Make sure that the flue outlet of the vari-
able terminal points straight upwards.
3
19