Flat-Roof Installation; Hydraulics Installation 6; Installation Type: Direct Connection Or System Separation; Guaranteeing The Minimum Circulation Water Volume - Vaillant aroTHERM plus VWL 35/6 A 230V S2 Operating Instructions Manual

5.9.2 Installing the product
1. Check the design and load-bearing capacity of the wall.
Note the weight of the product.
2. Use the unit mounting bracket that is suitable for wall
mounting from the accessories.
3. Use the small damping feet from the accessories.
4. Align the product exactly horizontally.
5.9.3 Installing the condensate discharge pipe
Danger!
Risk of injury due to frozen condensate.
Frozen condensate on paths may cause falls.
▶
Ensure that condensate does not dis-
charge onto paths and that ice cannot
build up there.
1. Connect the condensate discharge tundish to the pro-
duct's floor plate, and secure this in place by turning it
by a 1/4 rotation.
2. Below the product, create a gravel bed into which any
condensate can drain.
5.10

Flat-roof installation

5.10.1 Guaranteeing occupational safety
▶
Ensure that the flat roof can be safely accessed.
▶
Maintain a safety area of 2 m to the fall edge, plus the
clearance that is required for working on the product. The
safety area must not be entered.
▶
If this is not possible, then install technical fall protec-
tion at the fall edge, for example reliable railings. Altern-
atively, set up technical safety catch equipment, for ex-
ample scaffolding or safety nets.
▶
Maintain sufficient clearance to any roof escape hatches
and flat-roof windows. When carrying out the work, use
suitable protective equipment (e.g. barriers) to prevent
you from stepping on or falling through any escape
hatches and flat-roof windows.
5.10.2 Installing the product
Warning.
Risk of injury due to toppling over in the
wind.
The product may topple over if there is a wind
load.
▶
Use a concrete base and an anti-slip pro-
tective mat. Screw the product to the con-
crete base.
1. Use the large damping feet from the accessories.
2. Align the product exactly horizontally.
0020297933_03 aroTHERM plus Installation and maintenance instructions

Hydraulics installation 6

5.10.3 Installing the condensate discharge pipe
1. Connect the condensate discharge pipe to a downpipe
over a short distance.
2. Depending on the local condition, install electrical trace
heating in order to keep the condensate discharge pipe
frost-free.
6 Hydraulics installation
6.1 Installation type: Direct connection or
system separation
In the case of a direct connection, the outdoor unit is hy-
draulically connected directly to the indoor unit and the heat-
ing installation. In this case, if there is frost, there is a risk
that the outdoor unit will freeze.
In the case of a system separation, the heating circuit is sep-
arated into a primary and a secondary heating circuit. In this
case, the separation is implemented using an optional inter-
mediate heat exchanger, which is positioned in the indoor
unit or in the building. If the primary heating circuit is filled
with a water/frost protection mixture, the outdoor unit is pro-
tected against freezing in the case of frost or a power cut.
6.2 Guaranteeing the minimum circulation water
volume
In heating installations that are equipped primarily with ther-
mostatic or electrically controlled valves, a constant and suf-
ficient flow through the heat pump must be ensured. When
designing the heating installation, the minimum circulation
water volume of heating water must be guaranteed.
6.3

Requirements for hydraulic components

Plastic pipes that are used for the heating circuit between the
building and the product must be diffusion-tight.
Pipelines that are used for the heating circuit between the
building and the product must have UV- and high-temperat-
ure-resistant thermal insulation.
6.4

Preparing the hydraulics installation

1. Flush the heating installation thoroughly before con-
necting the product in order to remove any possible
residue from the pipelines.
2. If you carry out soldering work on connectors, carry this
out while the associated pipelines have not yet been
installed on the product.
3. Install a dirt filter in the pipeline for the heating return.
6.5

Routing pipelines to the product

1. Route the pipelines for the heating circuit from the build-
ing, through the wall duct and to the product.
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