Leda 270 Installation And Owner's Manual - Electrical Connections
11
Installing the flow and return lines
As water temperatures in the solar collector panels and pipework connecting them to the
hot water storage tank can reach extreme temperatures during stagnation conditions
(>150
o
C) USE ONLY COPPER PIPE and ensure it is insulated with suitable UV resistant and
weather proof insulation of 19mm minimum thickness.
Run the flow and return pipes with a continuous rise and fall to eliminate air locks, and with
a minimum of bends to minimise resistance. The maximum distance between the hot water
storage tank and the solar collector panels should be no more than 15 metres.
Electrical connections
All electrical work must be carried out by a licensed electrician who will adhere to all local
codes and regulations. The following electrical connections will be required:
-‐ A general power outlet to run the pump and controller (weatherproof if outdoors);
-‐ A general power outlet to run the gas booster if the system is a gas boosted system
(weatherproof if outdoors);
-‐ A hard-‐wired connection to the electric element if the system is an electric boosted
system.
When connecting the electric element, the power supply must be protected by an individual
circuit breaker at the main electrical switchboard. As various element sizes are available, it
is important to ensure the wiring and circuit breaker are rated to suit the particular element
size fitted to the storage tank.
Electric boosted systems can be connected to an
Off Peak Tariff
if desired however a
“Night Rate Only” tariff is not recommended. “Night Rate Only” tariffs do not supply
electricity during daylight hours and solar water heaters connected to these tariffs can run
short of hot water during periods of inclement weather.
SAFETY WARNING!
Do not use plastic pipe for the flow and return lines connecting the
storage tank and solar collector panels. To do so will have
catastrophic consequences. Also use only brass and copper
compression fittings.
SAFETY WARNING!
Under stagnation conditions, water in the solar collector panels,
and the flow and return lines can become super-‐heated and will
cause immediate scalding and possible death. Take care when
opening fittings and ensure other persons or animals are kept safe.