Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 19

Installing the external unit
Avoid "air short circuits".
■ Take the lengths of the refrigerant
lines into account (see "Connecting
refrigerant lines").
■ Select the installation site so that the
evaporator cannot be blocked by
leaves, snow etc.
■ Select the installation site with due
consideration of the statutory regula-
tions on sound dissipation and reflec-
tions.
Technical guide "Heat pump
principles"
■ Never site in corners of rooms,
recesses or between walls.
■ Never install next to or below bedroom
windows.
■ Never install closer than 3 m to path-
ways, downpipes or sealed surfaces.
The cooled air in the discharge area
creates a risk of ice forming when
there are outside temperatures below
10 °C.
■ The installation site should be easily
accessible, for example for mainte-
nance work (see "Minimum clearan-
ces").
Type of installation
■ Floorstanding installation with cable
entry above ground level
■ Floorstanding installation with cable
entry below ground level
■ Wall mounting
Technical guide
(cont.)
Installation information
■ Installation on a floor:
Use supports (accessories) for floor-
standing installation.
Where such supports cannot be used,
install the external unit freestanding on
a solid base of at least 100 mm height.
In difficult climatic circumstances
(temperatures below zero, snow,
humidity) install the appliance on a
plinth of approx. 300 mm height.
Take account of the weight of the
external unit (see following table).
■ Wall mounting:
Use the wall mounting bracket set
(accessory).
■ Never install with the discharge side
facing the main wind direction.
■ Observe wind loads when installing
the unit on sites exposed to the wind.
■ When mounting the unit on a wall, the
wall must offer sufficient load-bearing
capacity.
■ Design wall outlets and protective
pipes for the refrigerant lines and elec-
trical cables without moulded parts
and changes of direction.
■ Incorporate the external unit into the
lightning protection system.
■ Consider the heat emitted by the unit
when planning your weatherproofing
measures or an enclosure.
■ Ensure the condensate can drain
freely, and create a permanent gravel
bed below the external unit as a soak-
away.
Installation sequence
19