Service Guide / Trouble Shooting - Schwank infraSchwank D 15U Technical Manual

infraSchwank D / calorSchwank D - shape U
12 Service guide /
Trouble shooting
Maintenance and annual check
A regular maintenance is the requirement for a
faultless operation of the appliance.
According to the National Standard Regulations,
heating-systems with radiant tubes must be checked
at least once a year.
Maintenance and trouble shooting is only allowed by
professional personnel that is competent and
instructed in radiant tubes.
Maintenance must include the following checks:

Check the surface of radiant tubes

Check the pollution and sooting of tubes
 clean (if necessary)

Check tightness of the tube system including
connection to the burner unit

Check the air/flue-system  clean (if necessary)

Check the gas connection  Leakage-test

Check the connection pressure, nozzle pressure
and start step

Check gas filter in case of reduced line
pressure, in case of pollution change filter set

Check the safety functions of the ignition- and
ionisation-controls

Check the valve functions

Check the function of the pressure switch

Check the electrical connections

Check the slope of the tubes (3 mm/m in
direction of the turn around box connection)

Check the flexible gas hose and electrical
connection to the burner unit

Check the room temperature control

Check the distances to any flammable materials

Check the air/flue ventilation of the room

Remove condensation water in the tube

Check correct connection of the reflectors

Check if the fan impeller runs correctly and is
free of any damages

Check the tight fit of the fan venturi

Check connection and tightness of the fan to the
burner unit
28
Any deviations must be fixed immediately. Defect
parts must be changed directly.
Pressure switches, pressure regulators, valves and
safety- and ignition devices can only be maintained
by the manufacturer or authorized personnel.
Trouble Shooting
fault reason
• No gas (check pre- and nozzle
Burner does not start
pressure)
• Fault in electrical supply
• Thermostat "OFF"
• Connection of ignition- and ionisation
electrode is wrong
• Differential pressure switch is defect or
out of order (contact must be open)
Control goes in fault • Flame signal wrongfully caused by
position during pre- electrical defect of control
purge period
• Pressure differential is not sufficient
Control goes in fault • No flame (no ignition, valve doesn't
position during the open, no gas)
safety time
• No or poor flame signal (flame does not
stick, bad insulation of the flame
detector, no contact between burner
and earth connection)
• W rong polarity
Control goes into • Flame is off
fault position during • Contact of differential pressure switch
operation opens
• Flame signal is poor
In case of doubt, please contact:
Mr. John Balass
Devex Systems Pty Limited
5/83 Bassett St
Mona Vale NSW 2103
Tel: 02 9997 2811
Fax: 02 9997 7852