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21
MAINTENANCE
Clean rust, scale and lime deposits from the inside of the boiler with a wire brush.
After removing all debris, ush out with clean water through the hand-hole and drain .
Clean the hand-hole cover with a wire brush and wash. Be sure the areas that contact the gasket and dy-
naseal are clean and smooth.
To protect against further scale and corrosion remove the old cathodic descaler. Install a New Market Forge
Cathodic Descaler. See g. 2 or 3, page 43.
Without the use of gasket compound, re-install the handhole cover using a new gasket and dynaseal
washer. A torque of approximately 50 in. lbs. is required to reset the hex nut. Reinstall the pressure switch
box. Bring the boiler to operating pressure. If a leak appears, at the handhole cover, relieve the pressure in
the boiler and retighten the hex nut.
Clean the water gauge glass as follows:
Move the heat and power switch to their off positions. This will allow the boiler to empty.
Unscrew the ttings from both valves and slide them toward the center of the guage glass. Push the
water gauge glass downward compressing the rubber washer in the lower valve allowing the glass
to be removed.
Remove and discard the two rubber and brass washers. Slip off the two valve ttings and clean the wa-
ter gauge glass.
Reassemble by reversing the above steps with new rubber and brass washers . (see g. 4)
3.
4.
5.
6.
7.
8.
a)
b)
c)
d)
DO NOT DAMAGE COPPER HEATING ELEMENTS - BRUSH LIGHTLY. WORK DEPOSITS TO REAR
CORNER AND REMOVE WITH PUTTY KNIFE.
Fig. 2. Fig. 3.
Fig. 4.