5
x
Service and maintenance
27
BA ROTEX A1 BO - 10/2007
5.2.3 Check water pressure
• Check the water pressure in the heating system on the pressure gauge on the boiler control panel.
– Black pointer: Indication of the current water pressure in the heating system.
– Green range: Permitted water pressure range.
– Red pointer: Indication of the permitted minimum pressure.
The black pointer must be in the green range. If it is to the left of the red pointer, the water pressure must be increased by topping
up the system (see section 4.4.1).
5.2.4 Checking the condensate treatment unit
The condensate treatment unit cleans the draining condensation and neutralises its pH-value. The connection and drainage line
of the condensate drain must be free from impurities.
Checking that the condensate treatment unit is working (pH value).
Check functioning of the condensate treatment unit annually.
1.
Dip the indicator strips (provided with condensate treatment unit) into the water from the neutralisation box outlet.
2.
Remove the indicator strips after about 1 minute and compare the colour of the indicator strip with the accompanying colour
table.
The numerical value above the colour combination corresponds to the pH value of the water.
Î
pH value = 7
±
1: condensate treatment neutralised correctly.
Î
pH value
<
6: condensate treatment not neutralised adequately.
When the condensate treatment is not neutralised adequately:
1.
Check the combustion chamber and clean if needed (see chapter 5.2.5).
2.
Dismantle and regenerate the condensate treatment unit.
CAUTION!
Escaping gases can cause breathing problems and poisoning.
• The condensate treatment unit must always be connected and filled up, otherwise flue gases could escape
into the installation room.
The pH value measurement can be dispensed with if low sulphur EL heating oil is used exclusively and the
responsible Water Authorities do not specify neutralisation.
A pH value
<
5 despite regular maintenance indicates that the neutralisation medium is spent and the filling
quantity is no longer sufficient. In such a case, change the neutralisation medium (
15 45 75
).
