Watermaid WM40 Owner's Handbook Manual - page 11
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3. THE WATERMAID® POWER SUPPLY
The Chlorine Production Scale (pictured below) on the WATERMAID® Power Supply indicates how much
chlorine per hour the unit is producing.
At 100%, the WATERMAID® is producing 30 grams per hour of 100% available chlorine, shown by 3
amber AND 5 green solid lights simultaneously (see below).
The "+" and "-" buttons on the scale can be used to increase or decrease chlorine production. However,
chlorine production is dependent on the salt level AND water temperature. If the salt level or
water temperature are low, then less chlorine is produced.
At 6000 ppm saltand 20°C (68°F) water temperature, the QT300, XT300 and EZ300 Cells should run at
100%.
At 4000 ppm salt and 20°C (68°F) water temperature, the QT400 and XT400 Cells should run at 100%.
Areas with a hotter climate may have water temperatures around 30°C (86°F), in which case a salt level
not exceeding 4000 ppm is recommended.
For a full explanation of the trouble lights on the WATERMAID® Power Supply, please refer to the
troubleshooting section at the back of this handbook.
THE INTEGRATED CIRCUIT BREAKER/ROCKER SWITCH
If the Power Supply needs to be reactivated in the event of current overloading or a power surge to the
primary side, the switch on the underside of the WATERMAID® Power Supply will need to be turned ON
again.
It is recommended that this switch be turned OFF when dissolving salt, backwashing the filter, draining
the pool or there is no water flow through the Cell.
POWER OUTLET (Australian and European models only)
The power outlet on the underside of the WATERMAID® Power Supply is designed to power ONE pool
pump only.
This power outlet is rated to a MAXIMUM rating of 10 Amps and should NOT be overloaded with more
than one device. Exceeding the outlet rating is not covered by warranty.
+
* HIGH SALT LEVEL
* WATER FLOW
* GAS SENSOR
* LOW SALT LEVEL
* LOW WATER TEMP
* CHECK CELL
AUTO
CELL
CLEAN
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12
3. A dilute acid solution prepared according to the following procedure may be used:
i) In a glass or strong plastic container, add 1,000 mL (2.1 pt) of hot (not boiling) water.
ii) THEN add 100 mL (3.4 fl.oz) hydrochloric acid to the water.
iii) QT and XT series Cells can either be submersed in the solution or the solution can be poured into the
Cell after one end of the Cell is blocked. One end may be blocked by using a WATERMAID® cleaning cap
and barrel nut.
For EZ300 Cells,turn Cell upside-down (since one end is blocked already) and pour the solution inside.
Avoid submersion of the brass plug and socket.
The mixture may effervesce for several hours, and thereafter should be discarded. If the scale is
stubborn, step 3 may need to be repeated with a new solution.
Alternatively, white vinegar (without dilution) or a PHOSPHATE-FREE premixed "Cell-Cleaning Solution"
(available from a pool shop) may be used.
4. Rinse the electrodes with tap water.
5. Return the Cell to pipe-work ensuring not to overtighten the barrel unions.
IMPORTANT:
* The sensing tang on all WATERMAID® Cells (which is the small metal "tang" located on the
inside of the Cell, above the mesh electrode) needs to be kept clean.
* Do NOT tap the Cell casing with ANY instruments.
* Boiling water is NOT recommended in Cell cleaning as it may discolour the casing.
* NEVER POUR NEAT (UNDILUTED) ACID DIRECTLY INTO THE CELL.
* ALWAYS ADD ACID TO THE WATER.
* WEAR RUBBER GLOVES when handling acid.
* Always have either a hose or a bucket of water nearby for accidental spills. Please read the
manufacturer's safety precautions when handling acid.
(iv) DISCONNECTING THE CELL FROM POWER SUPPLY
*Turn OFF the power to the WATERMAID® at the power outlet.
*Unscrew the cover of the black junction box located on the underside of the WATERMAID® Power
Supply.
*Unscrew the single screw holding the Cell Cable, as well as the 3 brass screws holding the wires.
*When reconnecting the wires, ensure the connection is TIGHT and that the wires are connected
correctly [refer to section 2(v)].
(v) AGE OF THE CELL
After a number of years the active coating on the anode (mesh) electrode will wear away. At a much
slower rate, the centre solid electrode will also wear away. Calcification, acid cleaning, current density
and solids in the water contribute to the wear rate of the electrodes.
Generally, the precious coating on the anode is lost at a rate of 1 microgram per amp hour. This means a
WATERMAID® Cell should have a 5-8 year life.
The use of neat (undiluted) acid solutions will deteriorate the precious coating of the anode electrode,
drastically shortening the life of the Cell.
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