Condensate Connection - Viessmann Vitocrossal 300 CT3 Series Installation Instructions Manual

Boiler Connections

Condensate Connection

Boiler water return temperature
18
Vitocrossal 300, CT3 Series Installation
Note: The "amount of condensate" and the "flue gas
temperature gross" graphs are independent of each
other.
1. Locate the neutralization unit either behind or next
to the boiler.
2. Trim the plastic hose supplied to the required
dimension, and connect it as a P-trap (or with a
siphon) to the condensate drain and the neutralization
unit.
If the condensate outlet of the Vitocrossal 300 boiler
is lower than the drain, a condensate pump must be
installed. Select a pump which is approved for condensing
boiler applications. To avoid condensate spillage, select a
pump with an overflow switch. The drain connection must
terminate into an open or vented drain as close to the
boiler as possible to prevent siphoning of the boiler drain.
IMPORTANT
Pipe ventilation must take place between the siphon trap
and the neutralization unit (if applicable).
IMPORTANT
Always connect the drain with a P-trap or siphon to
prevent flue gas from escaping into the space.
3. Connect the neutralization unit to the dewatering
system.
The amount of condensate to be expected during the
operation of the boiler can be read from the diagram
on the left.