Cleaning And Reconnecting The Condensate Drain System - Viessmann Vitocrossal 300 Series Service Instructions Manual

Vitocrossal 300 CU3A 26 to 199 Service

Cleaning and Reconnecting the Condensate Drain System

Flue collector, condensate drain, siphon, neutralizing
system and all hoses or pipe runs in between are
considered part of the condensate drain system.
Note: Clean the inside of the condensate drain system
at least annually.
1. Undo fitting A on the siphon B and remove the
siphon from the boiler.
2. Clean the inside of inlet connector D with a brush.
3. Remove bottom part C of siphon B, then clean and
refit it.
4. Fill siphon B with water and refit with inlet connector D.
Note: There is a risk of flue gas escaping if the siphon
is not filled with water.
5. Clean the insides of the condensate drain system and
the neutralizing system (if installed).
6. Check the pH value of the condensate with pH
measuring strip. If the pH value is less than 6.5,
replace granulate.
7. If contaminated:
Rinse neutralization unit with tap water.
8. Add granulate as marked.
Refer to the Neutralization Unit
Installation Instructions (if applicable)
9. Undo drain hose to the building drain from siphon B.
10. Reconnect the neutralizing system to the siphon B.
IMPORTANT
pH measuring strip must be field supplied.
IMPORTANT
The granulate is consumed as it neutralizes the condensate.
For minimum granulate level, refer to the neutralization unit
Operating Instructions.
Checking that the condensate drain and neutralizing
system (if installed) are not obstructed and that they
are free from leaks.
Add water to the combustion chamber.
Note: The water must flow from the condensate drain
without back pressure. If necessary, clean the
condensate drain again.
Service
25