Water Quality And Treatment - andrews CSC 39 Installation Manual, Operation And Service Manual

SECTION 3
WATER
QUALITY AND
TREATMENT
Hydrojet System
Hydrojet Inlet Nipple
(Front Cold Inlet
Connection)
20
INSTALLATION
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.
Each water heater is fitted with one or more magnesium anode(s) which protects the
tank from corrosion caused by electrolytic action. Magnesium anodes are sacrificial in
that they corrode as they protect. When the anode has eroded to less than 50% of it's
original diameter, it may not offer protection. The anodes should be inspected annually
and replaced as necessary. Frequency of anode replacement will vary, dependent on
water quality.
Andrews Water Heaters offer Correx
standard magnesium anodes. These anodes do not need maintenance or replacement.
The potentiostat which regulates the current to the Correx
light which shows green to indicate the correct function and red to indicate the
malfunction. These anodes are available as an optional extra on all Andrews heaters.
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.
The 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.
TM UP powered anodes as an alternative to the
TM anode features an indicator
Tank
Heater
Casing
1/4 x 1/2 slot
see note
Note:
When installing or making
final connections to the
Hydrojet Cold inlet nipple, it
is important to ensure that
the slot is located in the
position as shown above.