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WaterMaster 25 - 35 - 45 - 70 - 85 - 120 : A1006482 - 664Y7300 • D
en
46
EN
FR
NL
ES
IT
DE
PL
RU
MAINTENANCE
TORQUE VALUES Tightening torque
(Nm)
Description Min. Max
Burner ange screws 5 6
Electrode screws 3 3.5
CLEANING THE EXCHANGER
Set-up conditions
Water heater shut down
External power supply isolated
Gas supply closed
Burner removed i.a.w. procedure “Removal and Installation of the Burner on page 44.
Front and top panels open, refer to “Removal and Installation of the Front and Top Panels” on page
39.
Procedure
1. Brush and vacuum clean the chamber.
2. Pour some water in the chamber to ush away any foreign deposits that may be present in the heat
exchanger.
3. Remove and clean the condensate trap.
4. Reinstall the condensate trap, refer to Water heater preparation on page 37.
Follow-on tasks
1. Reinstall the burner according to procedure “Removal and Installation of the Burner” on page 44.
2. Restart the water heater in accordance with procedure “Restarting after Maintenance” on page 46.
RESTARTING AFTER MAINTENANCE
Set-up conditions
All removed components reinstalled
All connections made
Power supply
Gas supply open
Hydraulic circuits full of water
Procedure
1. Make sure there is no gas leak at the gas connections.
2. Switch the appliance on using the ON/OFF master switch.
3. Set the appliance at maximum power and check the absence of gas leaks.
4. Check the gas pressure and CO2 adjustment in accordance with “Checking and Adjusting the Burn-
er” on page 42.
Follow-on tasks
None
1
12
3
2
3
WaterMaster® 25 - 35 - 45 WaterMaster® 70 - 85 - 120
REMOVAL, CHECK AND INSTALLATION OF THE BURNER ELECTRODE
Set-up conditions
Water heater shut down
External power supply isolated
Gas supply closed
Front and top panels open, refer to “Removal and Installation of the Front and Top Panels” on page
39.
Removal procedure
1. Disconnect the electrode grounding cable from the electrode.
2. Disconnect the electrode ignition cable from the electrical box.
3. Remove two mounting screws (1) and retain them for reinstallation.
4. Remove the electrode (2) and the gasket (3).
5. Check the correct alignment of the electrode ends and that the gap corresponds to the values
indicated on the gure below.
6. If the electrode is in bad condition, replace it.
Installation procedure
1. Install a new gasket (3).
2. Install the electrode (2) using the two screws (1), torque i.a.w. Torque Values” on page 46.
Follow-on tasks
1. Reconnect the grounding cable to the electrode.
2. Reconnect the ignition cable to the electrical box.
Essential recommendations for the correct operation of the appliance
Remove the electrode to control it in case of ignition problems.
Min. 3 mm
Max. 4 mm
48


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