Iii) Mount The Power Supply; Iv) Install The Watermaid Cell; V) Attach Cell To Power Supply; Vi) Connect To The Power Outlet - Watermaid WM10LED Owner's Handbook Manual

TO LOWER TOTAL ALKALINITY
USING LIQUID POOL ACID
(HYDROCHLORIC ACID)
LOWER POOL VOLUME IN LITRES INCREASE
100,000
ppm 50,000 75,000
10 395mL 554mL 790mL
1.60L
20 580mL 1.20L
2.45L
30 1.22L 1.85L
40 1.60L 2.40L 3.20L
50 2.00L 3.05L 4.00L
4.80L
60 2.40L 3.65L
70 2.82L 4.25L 5.65L
80 3.20L 4.85L 6.40L
7.20L
90 3.60L 5.45L
100 4.05L 6.10L 8.10L
Table A
A common problem for any type of pool or spa is algae growth. There are 24,000 known types of
algae, all distinguishable by being single-celled organisms capable of photosynthesis (they produce
their own food), mitosis (all cells can divide) and meiosis (reproduction is possible by combining
with other algal cells).
A microscopic photo of algae
Algae will die from doses of chlorine as low as 0.05 ppm concentration, but spores can resist
chlorine levels of up to 10 ppm. Salt chlorinators do not achieve those conditions and a manual
chlorine dose would need about 1-2 Kg (2-4 pt) of hypochlorite equivalent to be effective.
Spores, however, cannot tolerate copper salts as copper attaches to the shell or
endospore preventing germination. Hence, the most effective algaecides contain copper salts.
For a few black algal spots, suspending 50 grams (approx. 2 ounces) of stabilised chlorine in a
weighted nylon bag over the trouble spots may remove them.
For a more serious algae problem in pools, it is advisable to:
1. Lower pH below 7 [generally by the addition of up to 2 litres (4 pt) of pool acid] as this is an
essential part of reducing algae resistance.
2. About 4 hours later, add a copper treatment to attain a 1 ppm copper level in the pool.
About 1 heaped tablespoon of copper sulphate (approx. 70 grams or 3 ounces) dissolved in 10
litres (approx. 3 gal) of water spread around the pool is the most economical method. But the use
of any commercial copper-based algaecide will do.
Note: Do not swim in the pool for at least 24 hours, as the copper treatment may
discolour hair and clothing.
3. After about 12 hours a stainless steel brush and a garden hose fitted with a brass jet gurney
(available from hardware stores) can be used to remove algae from the pool walls.
4. Floc the pool with a clarifier. After a few hours, a blanket of debris will settle on the pool
TO RAISE TOTAL ALKALINITY
USING SODIUM BICARBONATE
Measurements
POOL VOLUME IN LITRES
ppm 50,000
75,000 100,000
10
893gm 1.34Kg 1.79Kg
20 1.70Kg
2.60Kg 3.40Kg To convert from
30 2.60Kg
3.90Kg 5.20Kg
Litres to Gallons:
40
3.40Kg 5.20Kg 6.80Kg
50 4.30Kg
6.50Kg 8.60Kg
60 5.20Kg
7.80Kg 10.40Kg
To convert from
70
6.00Kg
9.10Kg 12.00Kg
80 6.80Kg
10.40Kg 13.60Kg
90 7.80Kg Pounds: x 2.205
11.70Kg 15.60Kg
100
9.00Kg
13.40Kg 18.00Kg
Table B
12. ALGAE
The ideal environment for algal growth is when
there are periods of zero chlorine. Algae blooms
can take less than a day to turn a pool or spa
green.
At the first sign of adversity, the algae
population goes into a reproduction phase to
produce SPORES. The size of these spores is
less than 0.2 microns. D.E. filters and sand
filters are able to filter 5+ microns and 20+
microns respectively.
16

(iii) MOUNT THE POWER SUPPLY

The WATERMAID Power Supply should ideally be enclosed within a splash-proof housing (e.g. in a
U.S.
filter box) and mounted in a position that complies with local regulations.
Coversion
1. Locate a suitable position for the WATERMAID Power Supply which allows for box dimensions
Formulae:
of 240mm wide x 320mm high x 130mm deep (9.4 x 12.6 x 5.1 in). [Allow at least 20 mm (0.8
in) from the top of the WATERMAID Power Supply to any structure or fitting above]
2. For Brickwork:
a) Drill 2 x 8 mm (0.3 in) diameter holes, 30mm (1.2 in) deep, that are 156mm (6.1 in) apart
x 0.2642
and level.
b) Insert 2 blue (8 mm or 0.3 inch diameter) wall plugs into the holes drilled.
c) Place the screws (provided) into the holes of the bracket (provided) and screw tight.
Kilograms to
3. For Mounting onto Timber:
a) Drill 2 x 4mm (0.2 in) diameter holes into the timber, 30mm (1.2 in) deep, that are 156 mm
(6.1 in) apart and level.
b) Place the screws (provided) into the holes of the bracket (provided) and proceed to screw
tightly into the timber.
4. Lift the WATERMAID Power Supply onto the bracket ensuring that it is secure on the wall.

(iv) INSTALL THE WATERMAID CELL

Before installing the Cell, unplug the filter, pump and WATERMAID Power Supply. This
is advisable so that the filter will not start inadvertently if a timeclock already exists. Also, close
off the valves if the filter and pump are below pool surface level or if there are no valves, block
off the inlet and outlet with cloth wadding or rubber stoppers.
The WATERMAID Cell should be installed as per the model-relevant installation diagram given on
page 6, 7 or 8.

(v) ATTACH CELL TO POWER SUPPLY

Using a screw driver, connect Cell wires to the Power
Supply wires contained in the black junction box as
follows:
Red or Brown - TO - Red or Brown
Black or Blue - TO - Black or Blue
If the wires are connected incorrectly, the unit may appear to work for a brief period but may
damage the Cell and Power Supply if left uncorrected.

(vi) CONNECT TO THE POWER OUTLET

Australian and European models: Insert the pump plug into the socket at the base of the
WATERMAID Power Supply [refer to "Final Setup" (below)].
*For a timeclock Power Supply, insert the plug into the electrical power outlet.
*For a non timeclock Power Supply, insert the plug into an external timeclock and plug the
timeclock into the electrical power outlet.
US and Canadian models:
For 110VAC models, insert the Power Supply's plug into the electrical power outlet [refer to "Final
Setup" (below)]. The outlet must be wired so that no power is available to the unit if the
pump is off.
For 220VAC models, the WATERMAID's power cord should be hard wired by a qualified technician
to run in conjunction with the pump.
White - TO - White
FINAL SETUP
POWER
EXTERNAL
STANDARD
OUTLET
TIMECLOCK
POWER SUPPLY
TIMECLOCK POWER SUPPLY
5
PUMP