Condensate Drain - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

External heat pump type AW-O-M

Condensate drain

Structure of foundations (side view)
A Concrete foundations according
to local requirements and in
accordance with the standard
rules of building engineering
B Frost protection (compacted
crushed stone); the thickness of
the layer is subject to local condi-
tions and the standard rules of
building engineering
C Condensate drain, heating water
flow and return of the hydraulic
connection set, electrical connect-
ing cables (LV and control cables)
and power supply cable to the
control panel
Preparing for installation
(cont.)
Drain all condensate derived from the
air (subject to temperature and rela-
tive humidity up to 20 l/h) via a DN 70
drain pipe, which should be protected
from frost and provide a steady fall.
If possible connect the condensate
drain to a drainage or sewer system.
In this case, provide a siphon with a
water level of at least 60 mm in the
frost-protected area.
Where the ground is able to absorb
water, the condensate can be soaked
away down to a frost-free depth into a
gravel bed.
Technical guide
23