Technical data

infraSchwank D / calorSchwank D - shape U
28
Version 004 infra_calor D shape U Australia 43/13 Technical specification subject to change
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
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
In case of doubt, please contact:
Mr. John Balass
Devex Systems Pty Limited
5/83 Bassett St
Mona Vale NSW 2103
Tel: [phone]
Fax: [phone]
fault reason
Burner does not start
• No gas (check pre- and nozzle
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)
• Flame signal wrongfully caused by
electrical defect of control
• Pressure differential is not sufficient
Control goes in fault
position during the
safety time
• No flame (no ignition, valve doesn't
open, no gas)
• No or poor flame signal (flame does not
stick, bad insulation of the flame
detector, no contact between burner
and earth connection)
• Wrong polarity
Control goes into • Flame is off
fault position during
operation
• Contact of differential pressure switch
opens
• Flame signal is poor
Control goes in fault
position during pre-
purge period