Removing And Changing Components - andrews MAXXflo EVO Series Installation And Maintenance Manual

6.2 REMOVING AND CHANGING COMPONENTS

NONE OF THE CONTROLS ARE REPAIRABLE . IF THEY ARE NOT FUNCTIONING THEY MUST BE
REPLACED In all cases, before work commences turn off the mains electricity and gas supply.
The following items do not require isolating water before removal:
• DHW tank temperature sensor (B3)
• Flue temperature sensor (B8)
• AVS37 GUI display
• LMS14 PCB Replacement
• Spark generator
• Combustion fan
• Overheat thermostat
• Gas valve
• Electrode removal
• Back fl ow prevention fl ue valve
The following items require isolation of water before removal and bleeding air afterwards:
• Heat exchanger
• Circulation pump
See the following sections for an explanation on how to change these components:
6.2.1 DHW TANK TEMPERATURE SENSOR (B3)
• Remove and withdraw the foam insulation above the top of the tank
• Gently pull the sensor up the dip tube
Sensor
• Undo the bulkhead seal and pull the sensor through to the front.
• Unplug connector from loom.
Sensor connector
• Cut off securing tie and remove sensor.
• Replacement is the reverse.
Maintenance
Bulkhead seal
Remove cable tie R R
55 MAXXfl o EVO