A.O. Smith ITES 1000, Installation, User And Service Manual

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0312809_ITES_NLEN_V0.0, 08-11-2019
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10 Maintenance
10.1 Sacrificial anodes
10.2 Descaling
10.3 Inlet security group
10.4 T&P valve
The boiler must be tested and cleaned by a recognized service engineer at least once
per year so that good operation can be guaranteed. During maintenance the device must
never be under voltage.
The life of the anodes is deter
mined by the quality and the quantity of water fl owing through the device. It is thus
recommended that the anodes are checked every year.
1. Close the stop valve in the cold water feed pipe.
2. Open up the nearest hot-water tap so that the water pressure in the boiler and
pipeline drops.
3. Loosen the anode using a correct spanner.
4. Check the anode and replace if this is tarnished above 60%.
5. Replace the anode in a water-tight way.
If it is necessary to replace the anode, it must be replaced with one of the same type.
The type of anode can be established via the device type and the complete serial
number.
Scaling depends on the water condition and the water demand. Besides, more scale
deposit will be formed in the device at high temperatures than at lower temperatures. A
temperature setting of 60ºC is recommended to ensure low scale deposit. Descale using
the appropriate agents. A descaling instruction is available for detailed information.
The inlet security group regularly needs to work (with the test button) in order to prevent
a blockage caused by scale. Water should escape in a full jet from the inlet security
group. Check whether the outlet pipe of the inlet security group is open. It is
recommended that an annual service contract is closed with an certified service
engineer.
The T&P valve regularly needs to work (with the test button) in order to prevent a
blockage caused by scale. Water should escape in a full jet from the T&P-valve. Check
whether the outlet pipe of the T&P valve is open. It is recommended that an annual
service contract is closed with an certified service engineer.