Solahart 151J, Руководство пользователя

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WATER SUPPLIES
17
Anode Inspection and Replacement
The anode installed in this water heater will slowly dissipate whilst protecting the cylinder. The life of the cylinder may be
extended by replacing the anode.
For water supplies which are either softened or desalinated, or where the water supply may alternate between a water tank
and a reticulated public supply or another supply, or where there is a variable supply (e.g. from a bore or public reticulated
supply from various water sources), the anode must be inspected (and replaced if there is any sign of depletion) within
5 years of its installation. For known very aggressive water supplies, the anode should be inspected within 3 years of its
installation. Refer to your local Solahart Dealer.
For all water supplies, if the anode is not replaced during a major service (refer to
“Major Service Every Five Years”
on
page 19) then the maximum time after installation when the anode should be replaced for this water heater is 8 years.
Caution
If the water supply has a TDS greater than 600 mg/L and a black anode has not been changed to a blue anode, there is the
possibility the anode may become overactive and hydrogen gas could accumulate in the top of the water heater during long
periods of no use.
If, under these conditions, the water heater has not been used for two or more weeks the following procedure should be
carried out before using any electrical appliances (automatic washing machines and dishwashers) which are connected to
the hot water supply.
The hydrogen, which is highly flammable, should be vented safely by opening a hot tap and allowing the water to flow.
There should be no smoking or naked flame near the tap whilst it is turned on. Any hydrogen gas will be dissipated. This is
indicated by an unusual spurting of the water from the tap. Once the water runs freely, any hydrogen in the system will
have been released.
Saturation Index
The saturation index is used as a measure of the water’s corrosive or scaling properties. The saturation index figures stated
are calculated using a water temperature of 80°C.
In a corrosive water supply, the water can attack copper parts and cause them to fail.
Where the saturation index is less than –1.0, the water is very corrosive and the Solahart warranty does not apply to a
copper sheathed heating unit or a solar collector in an open circuit solar water heater system. A corrosion resistant heating
unit must be used for the Solahart warranty to apply to the heating unit.
In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface.
Where the saturation index e0.40, the water is very scaling. An expansion control valve must be fitted on the cold
water line after the non-return valve to protect and for the Solahart warranty to apply to the temperature pressure relief
valve and water heater cylinder. Solar collectors in an open circuit solar water heater system should be covered when the
water heater is not intended to be used for more than two weeks.
Where the saturation index exceeds
+0.80, the Solahart warranty does
not apply to a standard watts
density heating unit or a solar
collector in an open circuit solar
water heater system. A low watts
density heating unit must be used
for the Solahart warranty to apply
to the heating unit.
Water which is scaling may be
treated with a water softening
device to reduce the saturation
index of the water.
Contact your local Solahart Dealer
if a replacement heating unit is
required.
very corrosive very scaling scaling
corrosive
+0.4 +0.8 0 -1.0
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SATURATION INDEX (SI)
SOLAR WATER HEATERS WITH ELECTRIC HEATING UNIT
WITHIN WARRANTY
SPECIFICATION
SATURATION INDEX
(calculated @ 80°C water temperature)
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