Installation guide

INSTALLATION SECTION 3
All models now incorporate the
new Hydrojet system on
cold inlet side connections.
This system ensures water is
directed onto the tank base
which minimises sediment build
up from day one of installation.
Heater Casing
Tank
31
WATER
QUALITY AND
TREATMENT
Hydrojet System
Fig. 9
Hydrojet Inlet Nipple
(front cold inlet
connection)
Where extreme conditions of water hardness exist, scale can form in any water heating
equipment, especially when the heater is working under conditions of constant heavy
demand and at high temperatures.
In hard water areas, scale formation can occur in hot water systems and hot water heaters
and the higher the temperature and volume of water used, the more problematic the scale
build-up can be. Water treatment is normally recommended when the hardness reaches
100 - 150ppm (7 - 10 degrees Clark) and above. This problem can be minimised by
reducing the water temperature in the heater and by fitting suitable water pre-treatment
equipment.
When installing Andrews Water Heaters in hard water areas we would recommend
that a water treatment specialist is consulted.
Each Andrews EC
O
flo Water Heater includes two factory fitted Correx™ UP Powered
Anodes as standard. These anodes do not need maintenance or replacement.
The potentiostat which regulates the current to the Correx™ anode features an indicator
light which shows green to indicate the correct function and red to indicate the malfunction.
The anodes and potentiostat are available as spare parts if required, see page 52 for part
numbers.
The EC
O
flo water heater is fitted with the Hydrojet Total Performance System incorporated
in the cold inlet nipple. The system is designed to increase turbulence and reduce sediment
build-up, reduce thermal stacking and increase delivery.