Exhaust Flue Installation Single Heater; Installation Exhaust Collecting System [Herringbone] - Schwank novoSchwank D 20S U Technical Manual

Gas connection has to be positioned
with 90° or 180° bend in the axle of the
heater to compensate the thermal
expansion of the heater. Otherwise
torsional forces will operate on the hose!
Avoid twisting of the flexible hose!
When tightening the union, counter hold
the nipple on the hose.
Pay attention that the flexible hose will
not be mechanically damaged by tools
etc. Do not buckle the hose.
Do not mount damaged flexible hoses!
Damaged hoses can break due to the
movement of the heater.

Exhaust flue installation single heater

The exhaust system is available an accessory of
the radiant tube heaters. The flue system is
connected at the end of the radiant tube. Note the
information in Chapter 4 „Planning".
novoSchwank shape U
Installation
exhaust collecting system
[herringbone]
The installation of the flue collecting system must
be carried out according to the planning of
Schwank.
 After mounting the heaters with their burner kits
including the 2/2-way valve [see page 25] the
connection set F [adapter and damper] have
to be mounted at the end of the tube heater.
The adapter must be fixed with a gasket at the
flange of the last radiant tube.
 The spiral tubes for the flue collecting system
with different lengths and dimensions must be
mounted according to Schwank planning.
When assembling the tube elements any burrs
or residue of oil and grease must be eliminated.
 All connecting tubes and collecting tubes must
be mounted with a small slope towards the
central exhaust fan [about 0,3 %, means 30 mm
per 10m]. Any dips and sinks in the tubes must
be avoided [to prevent collection of
condensate].
 The spiral tube elements are connected by
couplings. Each tube element must be fixed by
two self-tapping screws at opposite sides.
Screws may not be fixed at the bottom of the
tubes.
 After fixing the tube elements with screws all
tube connections must be sealed carefully with
high temperature silicon [temperature resistant
at least up to 200 °C, named f.e. NOVASIL].
When starting the central exhaust fan for the first
time all tube connections have to be checked
for tightness.
 If the Schwank planning requires a condensate
run off, this part must be mounted directly in
front of the exhaust fan [deepest point of the
system]. The condensate run off has to be
connected to a condensate pump or a siphon
[min. water barrier height 30 cm].
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