24
CAUTION!!!
Be careful when
installing coaxial venting
Proper assembly and installation of venting
elbows and tubing must include the use of
self-tapping screws to permanently secure
in place the internal and external discharge
tube (see figure 20 item P and N). Self-
tapping screws are used to insure that the
discharge vent tube remains in place and
not allow discharge gases to re-enter the
heater. Failure to secure the internal
discharge tube may result in the heater
backfiring and causing permanent damage
to the heat exchanger. Heaters which have
been damaged for this reason are not
covered in our limited warranty.
The stainless steel (End terminal) wind
guard must fit properly and inter-lock into
slip joint of intake pipe (see Figure 20 item
Q).
It is imperative that the internal discharge
pipe first be secured in place with self-
tapping scews (see figure 20 item N) and
before attaching and securing the external
vent pipe (see figure 20 item P). Also,
ensure that the two grids (R and S on the
Figure 20) of the end terminal come
completely out of the outer pipe. If the
intake grid (see figure 20 item S) is hidden
the heater will not receive enough air for
combustion and would fail to ignite.
Take particular care with the installation
of the piping sections that pass through
the wall toward the outside; these must
always allow for normal maintenance
actions, therefore install the pipes inside
a liner to enable them to be pulled out
Horizontal stretches should always have
an inclination of at least 2% in the
direction of condensation evacuation
devices or toward the point of discharge
into the atmosphere.
The flue gas discharge / air intake
system can be extended up to the
maximum distance indicated in chapter 6
at the end of the manual. Every 90° bend
has an equivalent loss to 3ft (1 m) of
straight piping. Every 45° bend has an
equivalent loss to 1.5ft (0.5 m) of straight
piping.
Figure 20 - Correct installation of the
coaxial pipe
FIRST
,
insert the vent inner pipe into the vent
elbow and tighten using self-tapping screws “N”
SECOND,
fit the outer pipe and secure it with
proper screws “P”
N = Screws provided
O = Inner pipe
P = Screws provided
Q = This position shall be respected
R = Discharge grid
S = Intake grid
3 - INSTALLATION
Figure 21 - Correct installation of the
coaxial pipe
