The Power Supply - Watermaid WM10LED Owner's Handbook Manual

bottom union clockwise and remove the Cell from the pipe work. Aim a strong jet of water from a
tap or hose into the Cell. If all scale is removed successfully proceed to step 4, otherwise proceed
to step 3.
b) For EZ300 Cells: If the mesh electrode is clean, then separate the electrodes by pulling the
brass plug out of its socket, unscrewing the barrel nut anti-clockwise and lifting the centre
electrode out. The centre electrode only (being solid titanium) may be scraped clean. If all scale
is removed successfully proceed to step 4.
If both the mesh electrode and the centre electrode contain scale, they can be removed by
unscrewing the T-Piece Barrel Nut (refer to Parts View in the EZ300 Installation Diagram). Do
NOT attempt to clean the mesh electrode by abrasion. Proceed to step 3.
If the barrel nut is difficult to unscrew, the use of rubber gloves will give a better grip. Hot water
can be poured over the union and/or a little vaseline over the thread may make the next removal
easier.
3. A dilute acid solution prepared according to the following procedure may be used:
i) In a GLASS or 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 Cells can be submersed in the solution or the solution can be poured into the Cell if one
end is blocked. One end may be blocked by using a cleaning cap with barrel nut, or sink plug.
For EZ300 Cells, avoid submersion of the brass plug and socket.
anode and cathode, the EZ300 Cell may be turned upside-down as one end is blocked and the
solution poured inside. To clean the cathode only, submerse the electrode part in the solution.
The mixture may effervesce for up to 30 minutes, and thereafter should be discarded. If the
scale is stubborn, step 3 may need to be repeated.
Alternatively, a PHOSPHATE-FREE premixed "Cell-Cleaning Solution" (available from a pool
shop) may be used.
4. Rinse the electrodes with tap water and return to pipe-work ensuring not to overtighten the
barrel unions.
IMPORTANT:
* It is important to note that for BOTH EZ300 and QT Series Cells, the sensing tang (the
small metal tang located on the inside of the Cell casing above the mesh electrode) also
needs to be kept clean and free of scale.
* Do NOT tap the Cell casing with any instruments.
* Boiling water is NOT recommended in Cell cleaning as it may discolour the Cell casing.
* NEVER POUR NEAT (UNDILUTED) ACID DIRECTLY INTO THE CELL.
* ALWAYS ADD ACID TO THE WATER.
* WEAR RUBBER GLOVES when handling acid.
* Always have nearby either a hose or a bucket of water 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 at the base of the WATERMAID Power
Supply.
*Unscrew the single screw holding the Cell Cable, as well as the 3 brass screws holding the 3
wires.
*When reconnecting the wires, ensure the connection is TIGHT and that the wires are connected
correctly [refer to section 3(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 solid centre electrode will also wear away.
current density and solids in the water contribute to the wear rate of the electrodes.
To clean both the
Calcification, acid cleaning,
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4. THE POWER SUPPLY

The WATERMAID Power Supply has a:
* CHLORINE PRODUCTION SCALE
The "+" and "-" buttons on the scale (pictured below) can be used to increase or decrease the
amount of chlorine the Cell will produce. However, the maximum level of chlorine able to be
produced is dependent on the salt level AND temperature of the pool or spa water.
If there is a drop in salt level or water temperature, less chlorine will be produced. With a salt
level of 6000 ppm and water temperature of 20 o C (68 o F), the QT300 and EZ300 Cells
should run between 75 and 100%, where 100% equates to 30 grams per hour of 100%
available chlorine.
If the red light flashes, either there is insufficent water flow or there is a problem with the
connection of the Cell and Power Supply [refer to section 3(v)]. Please note: if the Cell's gas
sensing tang [refer to section 7(iii)] is not clean, the Power Supply will be unable to check for
water flow and therefore unable to start producing chlorine.
A solid red light indicates that the unit is in overload. This may occur if the salt level is too
high, the metal electrodes have come into contact with each other, or components within the unit
have failed. No chlorine will be produced while there is a solid red light.
To put the WATERMAID into standby mode, continue pressing the "-" button until only the most
left amber light is flashing. Press the "+" button to activate chlorine production again. The
unit should be OFF or in standby mode when adding salt, backwashing the filter or draining the
pool, otherwise damage may result.
If the "+" button has been pressed several times, yet the lights will not light up past 50%, then
the salt level may not be adequate or the Cell may require attention.
The flashing blue "AUTO CELL CLEAN" light indicates the WATERMAID unit is automatically
self-cleaning. The Auto Cell Clean cycle is discussed in more detail in the next section.
* CIRCUIT BREAKER OR FUSE
In the event of current overloading or a power surge to the primary side of the unit, the circuit
breaker may need to be pressed or the fuse replaced to reactivate the WATERMAID Power Supply.
* 3-PIN POWER PUMP OUTLET (Australian and European models only)
ONE pump plug ONLY per WATERMAID Power Supply is recommended. Avoid using low
speed pumps as poor water flow from these may cause damage to the Cell.
* TIMECLOCK (optional) Refer to section 6.
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