Commissioning Exhaust Gas Collecting System [Herringbone] - Schwank novoSchwank D 20S U Technical Manual

Commissioning exhaust gas
collecting system [herringbone]
Before first start up
For first start up and commissioning of the system
please request a Schwank service engineer to
attend Adjustment by Schwank is a condition of
our warranty.
Gas fired radiant tube heater systems have to be
installed by a qualified engineer according to
local laws and rules in force.
Start up
 First check the complete electrical supply and
connections of the system. All plugs at the
burner kits must be taken off. Check the correct
connection of the plugs. After this the room
temperature regulation system is switched on.
Check the connection and the direction of the
rotation of the central exhaust fan.
 Check the complete connecting and
collecting tube system for a small slope towards
the central fan [no sinks for condensate!].
 Check the slope from central exhaust fan to the
chimney.
 Check the complete flue gas system for
tightness with central exhaust fan on [burners
off]. In case of leaks ensure tightness by high
temperature silicon.
Correct start up and commissioning without
system tightness is not possible!
 Now the negative pressure at test nipple nozzle
pressure is checked [burners off, dampers at the
end of the tubes completely open]. The
minimum negative pressure under these
conditions must be > 1 hPa.
In case the negative pressure level is lower
please check again the tightness of the
complete system. Also check that the damper
in front of the central exhaust fan is open.
novoSchwank shape U
Commissioning
 The safe evacuation of the exhaust gases of all
heaters is ensured by correct adjusting of
negative pressure. This is done by fixing the
dampers at the end of the heaters and may be
also the damper in front of the central exhaust
fan at the following values.
Required negative pressure level at test nipple
nozzle pressure [cold conditions]:
- novoSchwank 20S U...55S U: -0.8...-1.5 hPa
 Adjustment with central fan on, burners off.
 Start the adjustment with the heater furthest
away from the central exhaust fan. Take the
negative pressure at the measurement nipple
at the bottom of the burner kit. Therefore take
off the silicon tube between nipple and
solenoid valve. Negative pressure is adjusted by
moving the damper at the end of the tube
heater. After adjustment the silicon tube has to
be connected again between the nipple and
solenoid valve.
 Adjustment of the other burner now follows with
the same procedure.
 Having adjusted all the heaters the negative
pressure of the kits may have changed. A
second thorough check and adjustment of the
negative pressure of the kits is necessary. Then
the positions of the dampers must be fixed by
the screw.
 Now the heaters can be started up [opposite
sequence to adjustment].
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