Clark-Reliance Levalarm EA100D Anweisungen für Installation und Betrieb - Seite 9
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Symptom
2) Float is stuck in the "down" position"
Possible remedies:
1. Inspect the internal portion of the Levalarm Chamber
a. Isolate the Levalarm and make sure there is no pressure in the unit.
b. Remove the flange head assembly
c. Remove the stainless steel cotter pin(s) that hold the axle pin for the float rod in
d. Remove, inspect the float assembly.
e. If the float contains water or shows signs of obvious damage, such as collapse or
2. Reassemble the unit. Be sure to use stainless steel cotter pins (if not reusing the
original ones) on the float rod axle pin. Reinstall the Switch head assembly onto the
body with a new C1-3 gasket and apply a Teflon based sealant to both sides of the
gasket. Lubricate the bolts with a Nickel based high temperature lubricant and torque
the 4 or 6 bolts to 70 FT-LB, in 1/3 increments.
3. Test the unit for proper functioning
a. To test the switch assembly, set the unit in a vise and make sure that the switch
b. Attach an ohm meter to the common and normally open switch contact and
c. Then, move the ohm meter terminal from the normally open terminal to the
4. If the unit fails to test properly, contact Clark-Reliance for further instructions to adjust
the switch mechanism or to obtain authorization to return the unit for factory inspection.
If the switch tests OK, return unit to service.
Symptom
3) Float arm operates properly, but the
switch does not change state.
1. Test the EA100-14X Microswitch
a. Isolate the Levalarm and make sure there is no pressure in the unit.
b. Remove the flange head assembly
c. Remove the Switch cover
place. Inspect the pivot point where the pivot rod is inserted. Make sure that the
hole in the magnet tube is not elongated. This can cause the float assembly to
hang up.
a crack near the spud where the float rod attaches, replace the float (Ref: Part #
F3S) and use Loctite or equal on the threads of the float and float rod. Tighten
the new float securely onto the float rod
housing is on the same 45 degree angle as if it were mounted on the boiler
piping.
manually move the float up and down and verify the switch operates on both
directions. The meter should indicate continuity only when the switch is operated
in the closed position.
normally closed terminal and repeat the test. The meter should indicate an open
circuit only when the switch is in the open position.
Probable Cause
a) Pivot Rod wear or contamination
b) Failed float
Probable Cause
a) The EA100-14X switch is out of
adjustment
b) The EA100-14X switch has failed