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ture above 70 °C. This also eliminates the risk of
Legionella bacteria growth.
•
In the systems with the electric heating unit, en-
sure that the electrical installation is properly pro-
tected by protective circuit.
•
When heating water using a coil, limit the tem-
perature of the heating medium to 80°C, it will
be possible to avoid turning on the temperature
limiter.
•
In order to reduce the risk of scalding with water,
we recommend installing a anti-scalding valve.
•
Report any malfunctions in the storage tank oper-
ation to the authorized service centres.
It is forbidden to
•
Activate the heating medium circuit or electric
heating unit if the tank is not fi lled with water.
•
Use the storage tank, if you fi nd any malfunction
of the safety valve.
•
Install any device (such as cut-off and/or check
valves, etc.) between the storage tank and the
safety valve (except T-pipes).
•
Make any unauthorized repairs.
•
Stop water leaks from the safety valve.
5 Maintenance
Periodic inspections and maintenance are the condi-
tions of continuous operational readiness, reliability
and a long service life of the product.
Maintenance activities include the following:
•
Routine inspections and replacement of the
protective magnesium anode
•
Cleaning of the storage tank
CAUTION
Check the safety valve performance as spec-
ifi ed by the valve manufacturer periodically
(min. every 14 days) or before each start-up
of the heater after decommissioning.
Inspection of the Protective
Magnesium Anode
Storage tanks of BA-ST Series are, in order to protect
them against corrosion, coated inside with ceramic
enamel and in addition, protected with isolated pro-
tective magnesium anode. The anode corrodes fi rst
under normal operation, thus protecting the storage
tank jacket. Therefore, you have to inspect its condi-
tion from time to time. Corrosion rate of the protective
anode is diff erent and depends upon the quality of
water in the area. We recommend checking the pro-
tective anode condition once a year in order to ensure
optimum corrosion protection.
BA-ST 9022-9100-FE
INFORMATION
The use of the isolated anode allows you to mon-
itor the degree of wear of the anode by measur-
ing the intensity of the protecting direct current
without having to remove it and empty the tank
(interrupting operation of the storage tank). This
solution simplifi es operation and additionally
contributes to the reliability and long lifetime.
Fig. 12 Insulated protective magnesium anode.
Measurement of the Protective
Magnesium Anode Wear
In order to check the degree of wear of the anode, do
the following (see Fig. 13):
1. Remove the housing cover together with thermal
insulation.
2. Disconnect the connecting conductor (protective)
from the storage tank top head.
3. Connect an electric meter (range in mA) between
the protective conductor and the M5 threaded pin
and measure the intensity of the protective direct
current.
Intensity of the protective direct current should not be
lower than 0.3 mA at full storage tank. If it is too low,
remove the anode and check its wear visually. If the
anode is signifi cantly corroded (above 50 % loss),
replace it immediately. Connect the anode protective
conductor to the tank after the measurement.
CAUTION
If the current intensity measurements do not
indicate any wear of the anode, its max oper-
ating time is not longer than 18 months. The
anode should be replaced after this time.
Chapter 4 |
Connection and start-up
Chapter 5 |
Maintenance
11
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