Installation and Operation manual ETHOS 36C and ETHOS 54C –1511/05-issue1
Page 28
7 MAINTENANCE
7.1 General
Maintenance tasks / inspections must be performed by a registered installer or gas service company, if:
1. The appliance generates a number of similar error codes.
2. A max. interval of 12 months has expired after installation or last inspection/maintenance.
ATTENTION: High Voltage
Before opening the boiler casing for maintenance or servicing parts, the 230VAC main supply to the boiler must be
disconnected!
7.2 Inspection
The following operations must be performed during an inspection:
a. Ask the user if there are any problems with the central heating appliance.
b. Check the installation for (water) pressure. Pressure should range from 1 to 2 bar.
c. Remove the jacket from the appliance and inspect all pipes and connections for trails of water and/or water leaks.
d. Inspect the top side of the jacket and the bottom side of the appliance for water leaks or trails of water from the air
supply pipe or bleeder.
e. Open the siphon and clean it, if necessary.
f. If you have a computer and software, connect the computer to the appliance and check the service page for error
messages, starts and failed/successful start attempts.
g. Let the appliance operate at maximum input and check the input and CO2%.
h. Let the appliance operate in the minimum input and check the input and CO2%.
i. Listen to the sound of the central heating pump and fan.
j. Measure the water flow rate and temperature in a hot water boiler with the hot water tap fully opened.
k. While the DHW is being heated, check if the supply to the central heating installation stays cold.
l. Disassemble the burner unit by removing the 6 M6 nuts, the ignition cable and earth cable and by pulling the
burner unit forwards.
When the burner is pulled halfway forwards, remove the fan cable plug from the fan.
Check the interior of the heat exchanger.
m. Disassemble the plastic gas/air mixing box at the fan suction side and inspect the fan wheel.
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General