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5773 597 - 04
Vitocrossal 200, CM2 400, 500 and 620 Installation
Boiler Water Temperature Sensor
Condensate Connection
(continued)
Pipe ventilation must take place between the siphon trap
and the neutralization unit (if applicable).
Always connect the drain with a P-trap or siphon to
prevent flue gas from escaping into the space.
Connection (external):
7
c
in. (19 mm) barb fitting
The amount of condensate to be expected during the
operation of the boiler and can be read from the chart.
If the condensate outlet of the Vitocrossal 200 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.
Legend
A
Condensate drain (must be able to be inspected)
B
Open or vented field supplied drainage system
IMPORTANT
IMPORTANT
Note:
If the boiler is installed even with the ground,
install a condensing drain above the ground max.
2 in. (50 mm).
Note:
The ‘amount of condensate” and the “flue gas
temperature gross” graphs are independent of each
other.
Amount of condensate
Boiler water return temperature
F
lue gas temperature gross
Flue gas temp.
at full input
at partial load
Flue gas temp.
Amount of
condensate
The Vitocrossal CM2 boiler comes with a built-in
condensate trap (field installed). An external trap is not
required when connecting the field drain to the P-trap.
Discharge tubing (field supplied) must be 1 in. diameter.
Use CPVC, PVC or other material approved by code
listed below.
The drain pipe and fittings must conform to ANSI
standards and ASTM D1785 or D2846. CPVC or PVC
cement and primer must conform to ASTM D2564 or
F493. In Canada use CSA or ULC listed schedule 40
CPVC or PVC drain pipe, fittings and cement.
1.
Install the condensate drain pipe with a suitable
gradient.
2.
Discharge condensate from the boiler into the drain
system, either directly or (if required) via a neutralization
unit
(accessory).
IMPORTANT
Do not connect the drain pipe from any other appliance,
such as a water softener backwash pipe, to the CM2
condensate drain pipe.
Boiler
