Maintenance - Field Controls WMO-1 Manual

MAINTENANCE

Note: For continued safe operation, the appliance-switch combination is required to be inspected and maintained
annually by a qualified agency.
1.
Disconnect power to the appliance.
2.
Remove the two screws holding on the WMO-1 blocked vent switch assembly cover.
3.
Remove the cover.
4.
Remove the two screws holding the control box to the heat transfer tube assembly. The control box slides,
unlocking it from the heat transfer tube assembly
5.
Carefully remove any buildup from the thermal switch surface.
6.
Clear and remove any buildup or obstruction inside the heat transfer tube.
7.
Remount, lock, and refasten the control box with the two screws removed.
8.
Reattach the assembly cover with screws removed in step 2.
9.
Re-establish power to the appliance.
DO NOT DENT OR SCRATCH THE SURFACE OF THE THERMAL SWITCH.
IF THE THERMAL SWITCH IS DAMAGED, REPLACEMENT IS REQUIRED.
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