4. The life of the CD subassembly varies in accordance with operational run times, injection flow rates, environmental factors,
and installation. In order to maximize the life of the CD subassembly, follow all instructions carefully.
5. To replace the CD subassembly, see "CD Subassembly" section of these instructions.
6. A residual ring ("bathtub ring") is experienced in all spas and is best removed with a product specifically designed for this
purpose.
7. To ensure that the injection system is working properly, occasionally check for bubbles coming from the return line. In the
event that no bubbles are present, check the injector, ozone check valves, and blue tubing for clogs, as they may collect
mineral deposits over time.
8. Although ozone is a more powerful killer of microorganisms than any chemical, such as chlorine, there is one advantage to
chemical purification. The killing effect of ozone in the spa is generally limited to contact of the outside sphere of the bubbles
with the water, and the killing effect of the chemicals is affected by mixing into the water. Because of this difference when
ozone is employed, surfaces (such as spa walls and bottom) are not disinfected, for only the water is disinfected. During spa
use bacteria may cling to the surfaces which result in a slippery feel. This bacteria can be eliminated by using a towel or rag
and wiping down these surfaces followed by using the filtration pump for approximately one hour. A shock of any liquid or
powdered dissolvable disinfectant will also eliminate the slippery surface. The human body will usually excrete about 1/4 cup
of perspiration during spa use, so it is easy to understand how bacteria is introduced into the water.
pH
The recommended pH for spas is 5.5 or higher. Refer to your spa manufacturer's owner manual for further details. Ozone
purification is very user friendly and does not require a specific pH level to be effective. A lower pH than required for chlorine
is healthier for the skin and hair.
SHOCKING WITH LIQUID CHLORINE
In the event that the spa water has become cloudy, it is necessary to shock the water with chlorine. Cloudy water is caused
by excessive use of the spa, which introduces contaminants, particularly bacteria. A guide for shocking for each 100 gallons
of water is as follows: Normal shock: 1/4 cup, Heavy shock, 1 cup.
CD SUBASSEMBLY REPLACEMENT
The anticipated life expectancy of the CD subassembly is approximately 2-5 years, depending on the ozonator run time. After
3 years, we recommend replacing the CD subassembly. When replacing it, specify JED Engineering part number 80-39-
70000.
INSTRUCTIONS FOR REPLACEMENT OF CD SUBASSEMBLY
1. Turn off power. Let unit cool.
2. Remove two holding nuts on CD subassembly.
3. Snip the wires between the CD subassembly and the transformer.
4. Wire the new CD subassembly to the transformer with the wire nuts supplied.
5. Reattach ozone resistant tubing and tighten back down with the two holding nuts. Do not over tighten.
View with door open
For CD subassembly replacement on the JED 103, call your local dealer or contact the factory.
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