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SECTION D – USING THE CLEARFLOW FOR DESCALING BOILERS & HEAT EXCHANGERS
DESCALING PROCEDURE
When working with acidic descaling chemicals always wear suitable protective clothing and goggles, and check and
observe instructions supplied with descaling chemicals.
PLEASE FOLLOW THESE INSTRUCTIONS TO AVOID
OPERATING OR SERVICING PROBLEMS.
Fill the tank with sufficient descaling solution to ensure
that the pump rotor housing is submerged during use.
The minimum liquid level is shown on the tank.
Screw the outer ends of the
flow and return hoses
securely to the plant or
equipment to be descaled,
using BSP threaded adapters
& PTFE tape if necessary.
Connect the power cable to
a suitable earthed power
supply (230 or 110 volt [50
Hz], according to model). As
the pump will be used in a
damp location, we
recommend that a residual
current circuit breaker plug
top be used.
Switch on the pump, and check to ensure that the liquid
level does not fall below the level of the rotor housing
(see above) as some of the contents of the tank enter the
equipment being descaled, particularly when the overall
capacity of the system being descaled is greater than the
tank capacity of the pump. If necessary, add more
descaling solution, or water. Check all connections for
leaks.
Please observe these precautions:
1. Always add the acid to the water, never the other way round.
2. Temperature of the descaling / flushing solution must not exceed 50
Monitor temperature closely when descaling plant / equipment which may already have a high temperature, such
as the domestic water coil in storage water heaters, or large plastic injection moulding tools.
3. Do not dissolve solid or crystalline descaling chemicals directly in tank, as this may choke the pump inlet and cause
abrasion damage. Dissolve solid or crystalline chemicals in a bucket first.
4. Always keep pump upright, particularly in transit, to avoid any liquid penetrating lower electric motor bearing, as
this may cause the bearings to wear prematurely.
Issue; May 2023
Safety Precautions
During use, the tank cap should remain loose and not be
screwed on by more than a quarter turn, to allow for the
passage and elimination of the gas evolved during
descaling. Check that the foam level does not exceed the
maximum filling level. If necessary, carefully add
FOAMBREAKER to the solution.
The built-in flow reverser makes it possible to attack scale
from both directions. During descaling periodically move
the flow reverser handle from one side to the other. This
reduces descaling time considerably, and is more
effective in flushing out any solid matter, which may then
accumulate on the base of the Clearflow tank. By
attacking scale from both directions it is possible to clean
piping which is almost totally obstructed.
Scale removal can be considered complete when bubbles
no longer form in the return pipe, and the solution is still
acidic.
SCALEBREAKER descaling chemicals, with a built-in colour
change to allow acid strength to be monitored visually,
are available from KAMCO.
Caps should be kept securely on all chemical containers
whilst not in use. As a matter of prudence, and to avoid
splashes, operators should avoid standing directly over
the open neck of either chemical containers or the filling
aperture of the descaling pump whilst pouring or adding
chemicals.
If the pump is not to be used for a period of time, wash it
out after use by circulating clean water through it, to
prevent any residues of the descaling process from drying
and "gumming up" the rotor.
Using your Clearflow for descaling
o
C.
Page D.1
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