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SAFETY INSTRUCTIONS FOR THE APPLIANCE MAINTENANCE
Essential recommendations for the electrical safety
Before opening the appliance for maintenance, turn off the boiler by pushing on
the ON/OFF master switch.
Isolate the external power supply of the appliance before performing any
operation, unless it is required to take measurements or perform system setup.
Essential recommendations for safety
Water flowing out of the drain valve may be extremely hot and could cause severe scalding.
Do not use solvents to clean any of the burner components. The components could
be damaged, resulting in unreliable or unsafe operation.
Check the tightness of the flue pipe connections.
Essential recommendations for the correct operation of the appliance
It is recommended to have the appliance and the burner serviced at least once a
year or every 1,500 hours by a qualified technician, preferably at the start of the
heating season. More frequent servicing may be required depending on boiler
use. Please consult your installer for advice.
The appliance and burner maintenance will be carried out by a qualified engineer,
and the defective parts may only be replaced by genuine factory parts.
Make sure to replace any gaskets or seals on the removed components before
reinstalling them.
To ensure maximum efficiency and reliability of the unit, it is recommended that the
end-user perform the periodic checks mentioned in the Safety section of this manual.
Control the tightness of the hydraulic circuit connections.
GAS
pressure
(mbar)
EN
FR
NL
ES
IT
DE
PL
RU
en
43
WaterMaster 25 - 35 - 45 - 70 - 85 - 120 : A1006482 - 664Y7300 • D
MAINTENANCE
TOOLS REQUIRED FOR MAINTENANCE
WATER HEATER SHUT DOWN FOR MAINTENANCE
1. Switch the water heater o using the ON/OFF master switch and isolate the external power supply.
2. Close the gas supply valve of the water heater.
PERIODIC WATER HEATER MAINTENANCE TASKS
Tasks
Frequency
Periodic
inspec-
tion
1 year 2 years
End-user Professional
1. Make sure that the system water pressure is at least 1 bar
when cold. Top up the system if necessary, adding small
quantities of water at a time. In case of repeated lls, call
your installer.
X X
2. Check that there is no water on the oor under the appli-
ance. Call your installer if there is. X X
3. Check that no error code is displayed on the control panel.
Call your installer if necessary. X X
4. Check that all gas, hydraulic and electrical connections are
correctly fastened and tight. X
5. Check the ue gas exhaust: correct fastening, correct in-
stallation, no leaks or clogging. X
6. Check that there is no discoloured or cracked area on the
burner chamber plate . X
7. Check the combustion parameters (CO and CO2), see
“Checking and Adjusting the Burner” on page 42. X
8. Check visually the heating body: no evidence of corrosion,
soot deposits or damages. Carry out all required cleaning
tasks, repairs and replacements that might be required.
X
9. Check the electrode, see “Removal, Check and Installation
of the Burner Electrode”, page 46. X
10. Remove the burner and clean the exchanger, see “Remov-
al and Installation of the Burner, page 44 and “Cleaning
the Exchanger” on page 46.
X
11. Check that the condensate trap is not clogged. If it is, re-
move it, clean it, and reinstall it i.a.w. Water heater prepa-
ration on page 37.
X
12. If a condensate neutralisation system is installed, check it
and have it cleaned. X X
Make sure to apply the correct torque value when tightening components. Refer to
"Torque Values" on page 46.
45


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