LAARS NeoTherm NTV600 - Install and Operating Manual - Manual (Page 49)

NeoTherm Boilers and Water Heaters
Page 47
appliance. Remove the front door to the appliance and
the control panel plastic bezel. Remove all wire
connections from the control board. The control board
connections are keyed to only allow connection in the
proper location, but proper handling techniques should
be used to avoid damage to the wiring or connectors. To
remove the control push in on the two tabs on the left
side of the board to unlatch the clips from the control
panel. Rotate the control around the fastening points on
the right side of the control to remove the hooks from
the control panel. To replace the control repeat the steps
above in the reverse order making sure to connect all
wires in the proper location. Place the appliance in
operation following the steps outlined in
Section 10 .
11.2.4 Ignitor Assembly
The ignitor assembly is a two rod system that
consists of a ground rod and a sense rod. To remove the
ignitor assembly, shut off the 120 Volt power supply to
the appliance. Turn off all manual gas valves connecting
the appliance to the main gas supply line. Remove the
front door of the boiler to gain access to the ignitor
assembly. Remove the two wires connected to the
assembly. Then remove the two bolts connecting the
ignitor assembly to the burner door. Remove and
replace the old ignitor assembly gasket. Reinstall a new
ignitor assembly in the reverse order if the old assembly
is determined defective. Replace gasket if necessary.
11.2.5 Flame Sensor
The flame sensor is a single rod system. To replace
the flame sensor electrode, shut off the 120 Volt power
supply to the boiler. Turn off all manual gas valves
connecting the boiler to the main gas supply line.
Remove the front door of the boiler to gain access to the
flame sensor electrode. Remove the flame sensor wire
from the electrode. Remove the two bolts fastening the
electrode to the burner doors. Remove and replace the
old flame sensor gasket. Reinstall a new flame sensor
electrode in the reverse order if the old electrode is
determined defective.
Caution
Igniters and sensors get hot and
can cause burns or injury.
Figure 34. Burner Service.