14
SR 130
29/05/06 - 300009755-001-H
Maintenance and periodic checks
Magnesium anode
The magnesium anodes must be checked at least every 2, years.
After the first check, determine the frequency of future checks on the
basis of anode wear.
The anodes can be checked by two methods:
Inspection:
- the anode must be replaced if its diameter is less than 15 mm
(original diameter = 33 mm).
Function test:
- disconnect the earth wire from the anode.
- measure the strength of the current between the tank and the
anode ; if the current measured is less than 0.1 mA, the anode
should be replaced.
If the anodes must be replaced, proceed as described below.
Valve or safety unit
The valve or safety unit must be operated at least
once a month
in
order to ensure that it is operating correctly and to be forewarned of
any overpressure which would damage the DHW tank.
Exchanger
In hard water regions, it is advisable to ask the fitter to descale the
DHW tank exchanger once a year in order to maintain its level of
performance.
Cladding
The cladding of the DHW tank can be cleaned with soapy water.
Procedures to follow for descaling, or checking or replacing the magnesium anodes
Use a new leak tight seal on the inspection trap.
1.
Turn off the domestic cold water inlet.
2.
Open a hot water tap.
3.
Open the valve on the safety unit.
4.
Remove the hood
A
using a broad-bladed screwdriver (see
detail) and then remove the insulation.
5.
Remove the sensor
B
from the thimble tube in the inspection trap
C
.
6.
Remove the cover (
13
mm spanner).
7.
Drain the calorifier.
8.
Check and remplace the anode
D
if necessary (13 spanner).
9.
Check the exchanger:
Descale the exchanger in order to maintain its performance
levels.
- Remove limescale deposits in the form of sludge or strips in the
bottom of the tank.
- On the other hand, do not touch limescale adhering to the walls of
the tank as it provides effective protection against corrosion and
improves the insulation of the DHW tank.
10.
Reassemble the parts.
Replace the leakproof seal E
on the
hatch. Put it in place with the retainer ring
F
taking care to place
the positioning lug on the gasket pointing to the outside of the
calorifier.
11.
Make sure the temperature sensor is pushed all the way into the
sensor socket.
12.
Check for leak tightness after assembly.
The screws retaining the visit trap must be tightened to
6 Nm +1/-0. Use a dynamometric spanner. Approximately
6 Nm is obtained by holding the box spanner by the small
lever.
13.
Switch on.
14.
Re-assemble the cover
A
.
