Viessmann AWT 221.A04, Installation And Service Instructions For Contractors

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Installation information
Types of installation:
■ Floorstanding installation with line entry above
ground level
■ Floorstanding installation with line entry below
ground level
■ Wall mounting
Technical guide
Floorstanding installation:
■
Use supports for floorstanding installation (accesso-
ries).
■
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 into account the weight of the external unit: See
the following table.
Wall mounting:
■
Use the wall mounting bracket set (accessories).
■
The wall must meet the structural requirements.
Positioning:
■
Never install with the discharge side facing the main
wind direction.
■
Provide wall ducts and protective pipes for the refrig-
erant lines and electrical cables without moulded
parts and change of direction.
Weather influences:
■
Observe wind loads when installing the unit on sites
exposed to the wind.
■
Incorporate the external unit into the lightning protec-
tion system.
■
Consider the heat emitted by the unit when planning
your weatherproofing or an enclosure.
Condensate:
■ Ensure the condensate can drain freely, and create a
permanent gravel bed below the external unit as a
soakaway.
■ In regions with prolonged cold seasons (e.g. Swe-
den), provide an electric ribbon heater (accessory)
for the condensate pan.
Insulation against structure-borne noise and vibra-
tions between building and external unit:
■ When line entry is above ground level, fit pipe bends
in the refrigerant lines to isolate vibrations: See
"Connecting refrigerant lines".
■ Route electrical cables/leads between the internal
and external units free of stress.
■ Installation only on walls with high weight per area (
>
250 kg/m
2
), in other words not on lightweight walls,
roof structures etc.
■ For floorstanding installation, only use the rubber
mounts supplied.
■ For wall mounting, only use the anti-vibration mounts
from the bracket set.
■ Never use additional anti-vibration mounts, springs,
rubber mounts, etc.
Weight of outdoor units
Type AWT/AWT-AC
Weight in kg
221.A04 43
221.A05 66
221.A07 66
221.A10 113
221.A13 113
221.B10 113
221.B13 113
221.B16 121
Installation sequence
Installing the outdoor unit
5776 028 GB
Installation