Leda 270 Installation And Owner's Manual - page 4
4
Section 1 – Installation instructions
Pre-‐installation checklist
1. Ensure you are aware of all relevant Standards and Regulatory requirements.
All LEDA hot water products must be installed by an authorised plumber, electrician and
gas-‐fitter (for gas boosted models). Installation work must comply with all local
authority standards as well as Australian Standard AS/NZS 3500.4, the National
Plumbing Code, all local electrical regulations and Occupational Health and Safety
Regulations. In some areas, the plumbing and electrical work will require certification by
local regulatory authorities.
2. Determine if the water supply quality is suitable.
Town water supplies are generally acceptable however some water supplies, especially
bore water, may have high mineral content which can cause clogging of pipes and
fittings. LEDA solar water heaters are of an “open loop” design meaning that potable
water flows through the storage tank and solar collector panels. Accordingly, water
supplies with total dissolved solids (TDS) higher than 1,000 ppm and total calcium
hardness (CaCO
3
) greater than 200 ppm with an alkalinity in excess of 150 ppm, are not
suitable. Water with a saturation index of -‐1.0 is considered corrosive and may result in
the early failure of copper parts. Scaling can occur where the saturation index is above
+0.4. Where the TDS is greater than 600mg/L or less than 40mg/L, the standard
sacrificial anode may be unsuitable to protect your water heater. In these
circumstances, a correct anode should be fitted by an authorised service person. If you
are unsure of the chemical composition of the water supply, please contact the local
water authority. Water heaters installed with incorrect anodes fitted due to high or low
TDS, or where the water is corrosive or considered scaling, will not be covered by
warranty.
3. Determine if the water pressure is suitable
A minimum 200kPa water supply pressure is required otherwise a pressure pump must
be installed. The gas booster (if applicable) requires a minimum flow rate of 3 litres per
minute to operate. A 500kPa pressure limiting valve should always be fitted, especially if
the supply pressure can rise above 500kPa.
4. Determine the best location for the hot water storage tank.
The storage tank (and gas booster if applicable) should be installed in close proximity to
the most frequently used hot water tap. However, other important factors must be
borne in mind including:
WARNING!
This water heater must be installed by suitably licensed and
qualified personnel.