Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 12

Installation sequence
Installing the outdoor unit
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 out-
■
door unit freestanding on a solid base of
at least 100 mm height.
■ In difficult climatic circumstances (temperatures
below zero, snow, humidity), we recommend instal-
ling the appliance on a plinth of approx. 300 mm
height.
Take account of the weight of the outdoor unit: see
■
following table.
Wall mounting:
■ Use the wall mounting bracket set (accessories).
■ The wall must meet the structural requirements.
Siting:
Never install with the discharge side facing the main
■
wind direction.
■ Provide wall outlets and protective pipes for the
refrigerant lines and electrical cables without moul-
ded parts or changes of direction.
Weather influences:
Observe wind loads when installing the unit on sites
■
exposed to the wind.
Where outdoor units are installed on a flat roof, con-
siderable wind loads may occur, depending on the
relevant wind load zone and height of the building.
For such installation situations we recommend hav-
ing the substructure sized by a design engineer in
accordance with DIN 1991-1-4.
■ Incorporate the outdoor unit into the lightning protec-
tion system.
■ Consider the heat absorbed (heating mode) and heat
emitted (cooling mode) by the appliance when
designing weatherproofing measures or an enclo-
sure.
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Condensate:
Ensure that the condensate drains off freely.
■
Create a permanent gravel bed under the outdoor
unit as a soakaway.
■ In regions with prolonged cold seasons, provide an
electric ribbon heater (accessories) for the conden-
sate pan.
Insulation against structure-borne noise and vibra-
tions between the building and outdoor unit:
■ For line entry above ground level, fit pipe bends in
the refrigerant lines for vibration compensation: see
"Connecting the refrigerant lines".
Route cables/leads between the indoor and outdoor
■
units free of stress.
■ Installation only on walls with a high weight per unit
2
area ( 250 kg/m ); in other words not on lightweight
>
walls, roof structures, etc.
Anti-vibration components are included in the stand-
■
ard delivery of the brackets for wall mounting and
floorstanding installation. Do not use additional anti-
vibration mounts, springs, rubber mounts, etc.