Trane CVHE Installation, Operation And Maintenance Manual page 74

Recommended Maintenance
observed loss of anode material is small, then the interval
between subsequent inspections can be lengthened.
Replace the anode and/or shorten the inspection interval if
the anode has lost 50 percent or more of its original mass.
If anode depletion occurs very quickly, consult a water
treatment specialist to determine if the anode material
selected is correct for the application.
NOTICE:
Equipment Damage!
Failure to follow instructions could result in equipment
damage. Do NOT use Teflon-based tape or paste on
anode; a small amount of liquid sealant (Loctite
equivalent) may be applied to prevent leakage when
installing an anode, but do not apply so much sealant
that it prevents the necessary electrical connection
between the anode and the waterbox.
As needed after draining the waterbox, use a 2-1/2 in.
(63.5 mm) wrench to remove/install Trane-supplied
waterbox anodes.
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