Viessmann VITOCAL 242-S Installation And Service Instructions Manual page 11

Installing the external unit
Weight of external units
Type AWT-AC
241.A04
241.A07
241.A10
241.A13
241.B10
241.B13
Installation site
■ Select a site with good air circulation,
so that the cooled air can dissipate and
be replaced by warm air.
■ Avoid direct insolation.
■ When siting the unit where it is
exposed to wind, ensure that the wind
cannot influence the fan area. Strong
wind can have a negative influence on
the evaporator ventilation.
■ Take into account the lengths of the
refrigerant lines: See "Connecting
refrigerant lines".
■ Select the installation site so that the
evaporator cannot be blocked by
leaves, snow etc.
■ Select the installation site giving due
consideration to the physical laws con-
cerning the propagation and reflection
of sound.
Technical guide "Heat pump
principles"
(cont.)
Weight in kg
43
66
113
113
113
113
Installation sequence
■ Never install in interior corners, in
recesses or between walls. This could
result in an "air short circuit" between
the air being discharged and the air
being drawn in.
!
Please note
An "air short circuit" during
heating operation will result in
the cooled discharged air re-
entering the unit. This can
result in reduced heat pump
efficiency and defrosting prob-
lems.
Avoid "air short circuits".
!
Please note
An "air short circuit" during
cooling operation will result in
the heated discharged air re-
entering the unit. This can lead
to high pressure faults.
Avoid "air short circuits".
■ Never install next to or below bedroom
windows.
11