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WARNING
Failure to abide by this maintenance rule may cause
damage to the DHW tank and void its warranty.
8.2.6. Descaling
Use a new leak tight seal on the inspection trap.
In hard water regions, we recommend asking the installer to carry out
an annual descaling operation on the DHW tank’s exchanger in order
to maintain its performance.
1. Turn off the domestic cold water inlet.
2. Drain the DHW tank.
3. Open a hot water tap.
4. Open the valve on the safety unit.
5. Remove the insulation from the inspection hatch.
6. Pull out the DHW sensor.
7. Remove the inspection trap (13 mm spanner).
8. Remove the 2 bulbs from the safety thermostat.
9. Remove the limescale deposited in the tank in the form of sludge
or strips. Keep the limescale on the walls of the tank: it provides
effective protection against corrosion and enhances the DHW
tank’s insulation.
10.Then replace all the parts in reverse order.
Each time it is opened, the lip gasket must be replaced to
guarantee tightness. Place the gasket’s positioning tab
towards the outside of the DHW tank.
11.After each intervention, ensure that the installation is watertight.
The screws retaining the visit trap must be tightened to
6 N·m +1/-0. Use a torque wrench.
8.2.7. Cleaning the condensates discharge duct
Check the cleanliness of the condensates discharge pipe. An
obstruction by dust may cause poor condensates flow or even a risk
of excessive accumulation of water.
DANGER
Risk of the heat pump malfunctioning.
C003214-F
TWH 200E TWH 300E TWH 300EH 8. Checking and maintenance
02/06/2015 - 300026515-001-06
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