26
SYS 10-23
Removal of burner (fig. 22)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear corners)
• Remove room sealed cover
• Disconnect ignition and flame rectification leads "A"
• Undo gas rail union "B"
• Undo two screws securing the burner
assembly to the boiler combustion
chamber "D"
• Withdraw the burner assembly
Injectors (fig. 22)
• Proceed as 7.08
• Remove fixing screw "C" on both sides
of gas collector
• Remove gas collector
• Unscrew and remove injectors;
• Clear or change injectors
fig. 22
C
A
B
D
D
Removal of fan (fig. 23)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear corners)
• Remove room sealed cover
• Disconnect fan electrical leads "A"and note positions
• Disconnect air pressure tubes from air pressure switch "B" + note positions
• Undo two screws securing fan assembly "C"
• Remove fan from boiler
• Swap mounting plate over to new fan + replace in reverse order
Limit thermostat, or overheat
cut off thermostat (fig. 23)
• Isolate electricity
• Remove outer case (two screws bottom rear corners)
• Remove room sealed cover
• Identify the location of thermostat from
• Pull out thermostat from tube, with its spring
• Remove electrical connections from thermostat
• Remove spring from thermostat
• Replace in reverse order
Overheat cut off
Limit
thermostat
C
A
B
fig. 23
Summary of Contents for SYS 10-23
Page 33: ...33 SYS 10 23 4 6 Internal electrical diagrams fig 30a...
Page 34: ...34 SYS 10 23 fig 30b...
Page 35: ......
