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 flange 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 flush 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 CO
2
adjustment in accordance with “Checking and Adjusting the Burn-
er” on page 42.
Follow-on tasks
None
1
1
2
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 figure 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
