HydraMaster Boxxer 421, Owner'S Manual

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Page 4-3: Machine Maintenance
Boxxer 421
AS REQUIRED: DE-SCALING
Scale deposits on the interior of the heating system can cause a noticeable loss in
heating performance. Deposits of this kind result from hard water deposits, exces-
sive chemical use, improper chemicals, etc. The frequency with which de-scaling
procedures are required will vary. If your area has particularly hard water or you see
evidence of deposits in the water system, you may have to de-scale monthly.
To de-scale your system, add an appropriate de-scaler chemical to your mix tank.
Circulate it through the heating system. Let it stand. Flush and repeat as necessary.
Clean all screens and strainers, and check them frequently following de-scaling.
NOTE : If you are using T.M. DeScaler through the flow meter, make sure to run clean
water through the flow meter after this procedure.
To de-scale using the recirculation kit (part no. 078-058), start with an empty mix
tank. Fill a third of the mix tank with T.M. DeScaler. Follow the recommendations on
the T.M. DeScaler label for proportions. Verify that the upper float is not lying hori-
zontal, but floats below.
Attach the recirculation fitting provided in the
kit to the garden hose quick connect (see illus-
tration) and this combination to the front of the
machine.
Attach one section of female/female solution
hose to the outgoing solution fitting on the front
of the machine and the other end to the garden
hose and recirculation fitting combination that
is attached to the front of the machine (or as
many sections as you want, if you wish to de-
scale your hoses).
Start the machine and allow it to run for three to five minutes. Do not leave the T.M.
DeScaler solution in the system. Flush the system with clean water and turn the
machine OFF.
Figure 4-1 Recirculation Fitting