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6.11
6.11 GRC air ducts for air-to-water
heat pumps (indoor
installation)
The glass fibre reinforced concrete air ducts offered as accesso-
ries are moisture-resistant and diffusion-free. They are supplied
in each respective cross section as 90° bends and as 625 mm
and 1,250mm extensions.
The formation of condensate is avoided due to the internal insu-
lation consisting of mineral wool and foil-clad glass fibre mat, re-
sulting in a clear reduction in sound transmissions. The ends are
fitted with zinc-plated pressed steel frames.
The ducts can be painted with standard emulsion paint according
to need.
Minor damage to the outer surface has no affect on the efficiency
and can be repaired with standard plaster.
Air-to-water swimming pool heat pumps with GRC air ducts and
built-under buffer tank
Assembly of a standard installation set-up:
Air ducts can be mounted as delivered if a standard installation
set-up is selected.
The required minimum clearances between the swimming pool
heat pump and walls should always be observed when position-
ing the air circuit.
The air ducts or bends are sealed in the wall opening with stand-
ard polyurethane foam in accordance with the dimensions in the
drawing. The ducts are supported at regular intervals from below
or using threaded rods from the ceiling.
ATTENTION!
For solid-borne sound insulation, the air ducts are not screwed directly
onto the heat pump.
To simplify future disassembly of the heat pump, a clearance of
approx. 2 cm should be kept between the swimming pool heat
pump and the duct. The seal to the heat pump is via a sealing
collar (available as an accessory).
E-10
All manuals and user guides at all-guides.com
Butt joint between two duct sections:
The duct sections are equipped with a metal fixing frame to facil-
itate connection. Using these fixing frames for connection avoids
air turbulence and the resulting pressure drops.
The components are sealed off from one another by gluing
standard foam rubber between the metal frames or by applying
silicone sealant between the metal frames.
Minimum clearances for indoor installation of the air-to-water
heat pump
Cutting lengths:
Existing air ducts can be shortened or adapted on site using the
conversion kit available as an accessory. The resulting cut edges
are coated with a suitable adhesive paste (i.e. silicone) and the
ends are then fitted with zinc-plated channel sections.
When determining where to make the cut, it should be noted that
straight ducts are equipped with the tab required for connection
at one end only.
The duct sections can be cut with standard woodworking tools
such as e.g. a circular saw or jigsaw. Carbide or diamond-tipped
tools are recommended.
Sealing collar
The sealing collar is used to seal the glass fibre reinforced con-
crete air ducts on the swimming pool heat pump. The air ducts
are not screwed directly onto the swimming pool heat pump.
When installed, only the rubber seal comes into direct contact
with the swimming pool heat pump. This guarantees easy as-
sembly and disassembly of the swimming pool heat pump and
also ensures that solid-borne sound is well insulated.
Sealing collar for air ducts
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