Dettson KLAVT0101DET Installation Instructions And Homeowner'S Manual Download Page 7

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surrounded  by  insulation  and  covered  with  an  outer  tube of
4”  (10,16  cm),  5”  (12,70  cm),  or  6”  (15,24  cm)    flexible
corrugated  aluminium  sleeve  to  protect  the  insulation.
Splicing

vent

lengths

together

prohibited.

Minimum/maximum continuous vent lengths permitted for
installation are 3' (0,91 m) minimum and 20' (6,10 m)
maximum respectively.

2.3.3

Connection to the furnace breech

1. Determine the length of the flexible vent (item I) and cut

it as required;

2. Install the flexible vent in its ultimate position;

3. Proceed with the installation of the transition (item H) on

the  flexible  vent  (item  I).  Apply  some  high-temperature
sealant (item M) on the threads of the transition piece to
ensure air tightness then screw the transition piece right
up to the end of the vent as shown in Figure 7.   Make
sure  that  the  seam  on  the  corrugated  stainless  steel
flexible vent (item I) is well aligned with the seam of the
transition  (item  H),  otherwise  you  will  not  be  able  to
screw  it  properly  (see  Figure  8).    The  corrugated
aluminium jacket fits inside of the transition outside ring
(item H);

WARNING

Make  sure  that  the  flexible  vent  (item  I)  is  well  secured
by  the  threads of the transition (item H) by pulling it.  If
you  can  remove  the  transition  (item  H)  without
unscrewing  it,  your  installation  will  not  be  air  tight.
Then, you must replace the defective part.

Figure 7 : Installation of the transition / terminal coupling

4. Apply a high temperature silicone bead (item M) around

the outside ring of the breech plate. Install the
transition (item H) piece on the furnace breech plate;

5. The installation of the transition must be such that the

port  for  pressure  measurements  is  at  the  top  and
accessible  once  the  installation  is  completed.    Do  not
install  the  transition  with  the  test  port  pointing
downward.  For details, see Figure 9;

6. Complete the assembly by using 3 #8 x 1/2" self-drilling

screws (item J) as shown in Figure 9. The seal is
permanent and should never need to be disconnected
as the breech plate can be removed by unscrewing the
nuts;

7. Apply sealant (item M) to cover completely the self-

drilling screw heads (item J);

Figure 8 : Seams alignment

8. In order not to damage the sealant, only the breech

plate on the furnace should be removed if and as
required.

Figure 9 : Connection to the breech plate

2.3.4

Connection to the vent terminal

1. Install the terminal coupling (item K) on the flexible vent

(item  I).  Apply  some high-temperature sealant (item M)
on  the  threads  of  the  terminal  coupling  to  ensure  air
tightness then screw the transition piece right up to the
end  of  the  vent  as  shown  in  Figure  7.    Make  sure  that
the seam on the corrugated stainless steel flexible vent
(item  I)  is  well  aligned  with  the  seam  of  the  terminal
coupling  (item  K),  otherwise  you  will  not  be  able  to
screw  it  properly  (see  Figure  8).    The  corrugated
aluminium  jacket  fits  inside  of  the  terminal  coupling
outside ring (item K);