Cleaning And Reconnecting The Condensate Drain System; Checking The Condensate Drain And The Neutralizing; System (If Installed); Checking Neutralization Unit (If Installed) - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Commissioning, Inspection, Maintenance
Steps – Commissioning, Inspection and Maintenance

Cleaning and reconnecting the condensate drain system

Note: Clean the inside of the condensate drain system
at least annually.
1. Pull drain or cleaning hose C off.
2. Clean the inside of the condensate drain system
(hose, pipe).
3. Clean the neutralizing system (if installed) in
accordance with the manufacturer's instructions.
See Neutralization System Operating Instructions.
Note: You can obtain the neutralizing granulate from
Viessmann.
4. Release and flush lower part D of siphon B.
5. Fill lower part D of siphon B with water and
reassemble.
6. Install hose A of the neutralizing system to the siphon.
22
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service
(continued)

Checking the condensate drain and the neutralizing

system (if installed)

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.
IMPORTANT
If the condensate does not drain freely, the condensate
will accumulate in the bottom part of the boiler, resulting
in burner shut-down (fault message).
Check neutralization unit (if installed)
1. Check the pH value of the condensate with a pH
measuring strip (field supplied). If the pH value is
less than 6.5, replace granulate.
2. If contaminated - rinse the neutralization unit with
tap water.
3. Add granulate as marked.
IMPORTANT
The granulate is consumed as it neutralizes the condensate.
The red marking indicates the minimum filling level.
See Neutralization Unit "Installation Instructions".