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4.2.2
0312734_ITS_400-1000_NLENFR_V4.1, 2024-01-22
Work order:
1. Undo bolts from the cover.
2. Remove cover and the gasket.
3. Inspect the tank and remove the loose scale deposits and contamination.
4. If the scale cannot be removed by hand, descale the water heater with a
descaling agent. Contact the supplier/manufacturer for advice on what descaling
agent to use.
5. Close the cleaning opening. To avoid damage to the tank, tighten the bolts, that
fasten the lid, with a torque no greater than 50 Nm. Use suitable tools for this.
Checking anodes
Anodes ensure the protection of the tank by sacrificing themselves. Insufficient anode
material may lead to poor protection and, hence, leakage of the tank.
1. Loosen the anodes one by one.
2. Check the diameter of each anode in different places. The diameter must be at
least 60% of the original diameter.
3. If the diameter is less than the minimum, the anode must be replaced. Please
contact the supplier/manufacturer to order new anodes.
4. Mount the (new) anodes.
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