Field Controls GVD-4 Mode D'emploi page 15

MAINTENANCE
WMO-1 B V
LOCKED ENT SAFETY SHUT OFF
For continued safe operation, the appliance-switch combination is required to be inspected and maintain
annually by a qualified agency.
1. Disconnect power to the appliance.
2. Loosen the two screws holding on the WMO-1 blocked vent switch assembly cover.
3. Remove the cover.
4. Remove the screw holding the control box to the heat transfer tube assembly. Slide the control box
off the heat transfer tube assembly.
5.
Carefully remove any buildup from the thermal switch surface. DO NOT DENT OR SCRATCH THE
SURFACE OF THE THERMAL SWITCH. IF THE THERMAL SWITCH IS DAMAGED, REPLACEMENT IS
.
REQUIRED
6. Check and remove any buildup or obstruction inside the heat transfer tube.
7. Remount, lock and refasten the control box with the screw removed in step 4.
8. Reattach the box cover and tighten screws loosened in step 2.
9. Re-establish power to the appliance.
Step 1 Step 2
14
Step 3
Step 4