WARNING ------------ WARNING ----------- WARNING
BE SURE TO PROVIDE A VENT AT THE TOP FOR ESCAPING GAS
e)
Allow the muriatic acid solution to soak in the tube coils for several hours, periodically pump
circulating it with an acid-proof pump. An alternate method whereby a bottle is filled with the solution
and attached to the coils by a hose can serve the same purpose, by raising and lowering the bottle.
The solution must contact the scale at every point for thorough descaling, therefore, insure that no
air pockets exist, by regularly opening the vent to release gas.
KEEP FLAMES AWAY FROM THE
VENT GASES.
f)
The time required for descaling will vary, depending upon the extent of the deposits. One way to
determine when descaling has been completed is to titrate the solution periodically. As scale is being
dissolved, titration readings will indicate the muriatic acid solution is losing strength. When the
readings remain constant for a reasonable time, this is an indication that scale has been dissolved.
g)
When descaling is complete, drain the solution and flush thoroughly with water.
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