Maintenance

3. Clean rust, scale and lime deposits from the inside of the boiler with a wire brush.

DO NOT DAMAGE COPPER HEATING ELEMENTS - BRUSH LIGHTLY. WORK DEPOSITS TO REAR

CORNER AND REMOVE WITH PUTTY KNIFE.

4.After removing all debris, flush out with clean water through the hand-hole and drain .

5.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.

Fig. 2.

Fig. 3.

6.To protect against further scale and corrosion remove the old cathodic descaler. Install a New Market Forge

Cathodic Descaler. See fig. 2 or 3, page 43.

7. 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.

8.Clean the water gauge glass as follows:

a)Move the heat and power switch to their off positions. This will allow the boiler to empty.

b)Unscrew the fittings 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.

c)Remove and discard the two rubber and brass washers. Slip off the two valve fittings and clean the wa- ter gauge glass.

d)Reassemble by reversing the above steps with new rubber and brass washers . (see fig. 4)

Fig. 4.