Zehnder Rittling ComfoSpot 50 User manual

Design-Heizkörper Komfortable Raumlüftung Heiz- und Kühldecken-Systeme Clean Air Solutions
Embrasure module installation instructions
Zehnder
ComfoSpot 50

Contents
1Scope of delivery ................................................................................................................... 3
2Installation conditions........................................................................................................... 3
3Installation versions .............................................................................................................. 4
4Installation position............................................................................................................... 5
5Preparing for installation....................................................................................................... 6
Drilling the core hole ................................................................................................................ 6
Preparatory work for direction-change adapter installation ..................................................... 6
Preparatory work for duct adapter installation ......................................................................... 7
6Installation .............................................................................................................................. 8
Installation steps before installing the thermal insulation composite system........................... 8
Installing the direction-change adapter.................................................................................... 8
Adapting/shortening the flat ducts............................................................................................8
Installing the flat ducts/duct adapters/duct insulating elements............................................... 9
Installation steps while building up the facade....................................................................... 11
Thermal insulation composite system.................................................................................... 11
Facade finish.......................................................................................................................... 12
Finishing the installation......................................................................................................... 13
All rights reserved
This manual has been compiled with the utmost care. Nevertheless, the publisher accepts no liability for damage caused
by missing or incorrect details in this manual.

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1 Scope of delivery
Item Description Quantity
1 Fixing clip (2x per direction-change adapter; 1x per flat duct adapter) 4
2 PVC screw dowel (1x for mounting each fixing clip) 4
3 Direction-change adapter with fixed wall mounting pipe 1
4 Blanking plug for wall mounting pipe 1
5 Flat duct gasket (56 cm blank from round profile gasket) 4
6 Flat duct 204 x 60 2
7 Flat duct insulating element 4
8 Duct adapter 2
9 M5 EPP insert (3x per duct adapter) 6
10 Discharge grille with prefabricated swelling sealing tape 2
11 M5x16 countersunk screw (3x per discharge grille) 6
2 Installation conditions
Please observe the following instructions for the installation and use of the embrasure module for the facade-integrated
outdoor and exhaust air ducts of the ventilation system.
The facade element is installed in the thermal insulation composite system in question. The relevant building
regulations must be observed.
Compliance with the relevant fire protection requirements must be ensured in advance.
The embrasure module can only be installed with a minimum insulating layer thickness of 120 mm and is to
be provided with an insulating layer in the direction of the facade surface that is at least 20 mm thick and made
of the facade insulation material used on site. Any planned measures for external shading must be taken into
account.
The wall thickness without thermal insulation composite system must not be less than the required minimum
wall thickness of 335 mm for the installation of ComfoSpot 50. If the dimension falls below this value, the
difference can be compensated for by placing insulation under the embrasure module.
The embrasure module cannot be used in conjunction with the square wall mounting pipe to accommodate
the ComfoSpot 50 ventilation unit.
The thermal limits of -20°C and +40°C for the operation of the ventilation unit also apply to the embrasure
module for air conveyance.
Ensure that the module can be easily accessed for maintenance.
1
3
5
6 7
8
10 11
9
5
7
2
4
7
7
6
8

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3 Installation versions
The symmetrical design of the direction-change adapter offers four options for installing the embrasure module, whereby
the outdoor air (ODA) airflow is generally conducted via the upper duct connections/discharge grille and the exhaust air
(EHA) airflow is conducted via the lower duct connections/discharge grille.
The OBEN / TOP embossing on the EPP housing indicates the prescribed installation position. The illustrations show
the system as viewed from the outside of the outer wall.
Installation variant 1
ODA and EHA duct on the
left
Installation variant 2
ODA and EHA duct on the
right
Installation variant 3
ODA duct on the left
EHA duct on the right
Installation variant 4
ODA duct on the right
EHA duct on the left

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4 Installation position
The embrasure module must be mounted on the outside of the outer shell wall, whereby the flat ducts must run horizontally
or with a minimal gradient to the discharge grilles in the mounting plane of the thermal insulation composite system. The
module can be positioned according to section 3Installation
versions , provided that the required installation area for
ComfoSpot 50 on the inside of the outer wall is taken into account (see section 5.1 Drilling the core
hole).
The unit (core hole pipe axis) must be positioned so that the distance to the ceiling of the room is at
least 200 mm.
The unit (core hole pipe axis) must be positioned so that the distance to the window reveal is between
370 mm and 1270 mm. It can be adjusted by shortening the flat ducts. The ducts must not be extended.
Dimensional drawing
Distance from the
core hole to the
ceiling

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Distance from the
core hole to the
window reveal
5 Preparing for installation
A vertical outer wall and a flat surface on the outside of the shell wall are required to properly install the
embrasure module. Any uneven surfaces must be compensated for in the area where the embrasure
module is fitted to the shell wall surface.
Drilling the core hole
Before drilling the core hole, select one of the four possible embrasure module installation variants. The minimum wall
thickness must be 335 mm. If the shell wall is not thick enough, the difference must be compensated for by placing
insulation under the embrasure module in the thermal insulation composite system plane.
1. Determine the core hole position based on the relevant installation variant in section 3Installation
versions.
Ensure that there is sufficient clearance around the installed ComfoSpot 50 unit and that there is enough room for
maintenance work to be carried out (at least 39 cm on the left, 29 cm on the right, 70 cm at the front and 20 cm at
the top – in relation to the pipe axis of the wall mounting pipe; viewed from the inside of the outer wall).
2. Drill the core hole (∅340 mm) in the horizontal axis of the drill hole, observing the explanations given in section 4
Installation position.
Preparatory work for direction-change adapter installation
Depending on the intended installation variant, the moulded parts serving as duct closure openings must be separated
from the EPP housing and the fixing clips (1) must be attached.
The processing measures are shown in the following sections based on installation variant 1: ODA and EHA duct on the
left.
When installed, the OBEN / TOP embossing on the EPP housing must be positioned at the top.
1. Use a sharp knife or a fine-tooth saw to carefully cut off the EPP moulded parts in the profile groove (white dashes)
of the relevant duct connections. The separated EPP moulded parts are to be inserted as blanking plugs in the duct
adapters (8) to protect against contamination until the facade is finished and the discharge grilles (10) are installed.

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2. For the remaining duct closure openings, only the protruding moulded parts (outer dimension ≙inner dimension of
duct adapter (8)) are to be cut off. Carefully cut off the protruding moulded parts in the profile groove (white dashes)
so that the insulation can be laid flush with the direction-change adapter (3).
3. To fix the direction-change adapter (3) to the outer wall, two fixing clips (1) must be mounted to the EPP housing
using PVC screw dowels (2). The two fixing clips (1) must be attached at the top of the direction-change adapter
(3) on the side facing the outer wall. The fixing clips (1) must be placed with a distance of approx. 10 cm to the side
and approx. 2 cm at the top between the drill hole and the outer edges of the direction-change adapter (3) and
screwed to the EPP housing using PVC screw dowels (2).
Preparatory work for duct adapter installation
To fix the duct adapters (8) to the outer wall, the fixing clips (1) must be mounted to the EPP housings of the duct adapters
(8) using PVC screw dowels (2). Depending on the left or right-hand-side installation variant of the flat duct (6), the fixing
clip (1) must be mounted on the side of the duct adapter (8) facing the outer wall.
When installed, the OBEN / TOP embossing on the EPP housing must be positioned at the top.
1. Place the fixing clip (1) with the drill hole on the centring aid (white dashed conical dome) and screw in the PVC
screw dowel (2).

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6 Installation
Installation steps before installing the thermal insulation composite system
Installing the direction-change adapter
1. Insert the wall mounting pipe of the prepared direction-change adapter (3) into the core hole and position it
horizontally in the shell wall.
2. Align the direction-change adapter (3) horizontally on the shell wall and fasten the fixing clips in place using suitable
fixing material.
3. Use only non-swelling mounting foam to fix the wall mounting pipe to the inside of the outer wall!
Throughout the installation process, ensure that the pipe remains level and round (max.
permissible deviation from the circular shape +/- 1.5 mm). If the tube exceeds these tolerances
then it is to be brought in the corresponding form fixed with suitable auxiliary means (wedges or
similar).
Adapting/shortening the flat ducts
The distance between the window reveal (discharge grille (10) position) and the direction-change adapter (3) (core hole
drill axis) can be adjusted by shortening the flat ducts (6). The duct adapters (8) can be shortened by the length of the
recess grooves embossed on the EPP body. The duct adapters must only be shortened to adapt them to the final facade
surface in the reveal area of the window.
The maximum lengths for shortening are shown as shortening areas for both components of the embrasure module in the
table below.

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Flat duct Duct adapter
Shortening area: 850 mm Shortening area, recess grooves: 50 mm
1. To determine the shortening length, insert the flat duct (6) as far as it will go into the duct connection of the direction-
change adapter (3) and fit the duct adapter (8) onto the flat duct (6).
Make sure that the cross-section contour of the flat duct is inserted all the way into the three guides
of the duct adapter (8).
2. Shorten the flat duct (6) by the determined length so that the area of the recess grooves or at least the front side of
the duct adapter (8) is located in the planned final facade finish of the vertical window reveal.
3. If you have selected installation variant 1 or 2, shorten the second flat duct (6) to the same dimension. If you have
selected installation variants 3 or 4, proceed as described under step 1 for the second flat duct (6).
Installing the flat ducts/duct adapters/duct insulating elements
Before installing the thermal insulation composite system, the following installation steps must be carried out for the
embrasure module. If you have selected installation variant 1 or 2, start by installing the lower flat duct (6).
1. Insert the flat duct (6) into the direction-change adapter (3) and fit the duct adapter (8) onto the flat duct (6).
When connecting these three embrasure module components, make sure that they stop and
engage in the correct positions.

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2. Align the flat duct (6) horizontally or with a minimal gradient to the duct adapter (8) and fix the duct adapter (8) in
the long hole of the fixing clip (1) with suitable fixing material.
3. Press a flat duct gasket (5) blank into the duct connections of the direction-change adapter (3) and the duct adapter
(8).
Always start pressing in the profile gasket blank at the top of the duct connection so that the
surrounding flat duct gasket (5) closes at the top.
It may be necessary to loosen the duct adapter (8) fastening in order to make it easier to insert the round profile
gasket on the side facing the wall.
4. Then carry out the same installation steps for the upper flat duct (6).
5. Shorten the length of the four flat duct insulating elements (7) to dimension x of the visible area of the flat duct (6).
If you have selected installation variants 3 or 4, shorten the flat duct insulating elements (7) in pairs according to
the visible areas of the flat ducts (6).
6. First attach the inner U-channels of the flat duct insulation by pushing them in between the shell wall and the flat
duct (6) from above or below. Then clip the outer U-channels of the flat duct insulation onto the inner U-channels
using the tongue and groove system.

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Finally, fix the flat duct insulating elements (7) with a suitable adhesive.
7. Insert the EPP moulded parts (see section 5.2 Preparatory work for direction-change adapter installation)
separated from the direction-change adapter (3) into the duct adapters (8) as blanking plugs. They will protect the
airways in the embrasure module against contamination until the facade surface is finalised.
8. Check that all the embrasure module components that have been installed up to this point are securely fixed in
place.
Installation steps while building up the facade
Thermal insulation composite system
1. Lay the remaining insulation material blanks around the embrasure module so they fit perfectly with the existing
insulant.
Install the thermal insulation composite system in such a way that there are no gaps between the
insulation material and the embrasure module.
2. After covering the embrasure module with insulation material up to the same thickness as the final insulating layer,
the duct adapters (8) – not the duct adapter blanking plugs – in the vertical window reveal must protrude by at least
the dimension of the planned facade finish compared to the finish of the thermal insulation composite system in the
area of the recess grooves (see section 6.1.2 Adapting/shortening the flat ducts). If the front surfaces of the duct
adapters (8) are level with the final facade surface, three yellow plaster plugs can be inserted into the front holes of
each of the duct adapters (8) instead of the blanking plugs in the case of a mineral-based facade surface. To protect
the airways against contamination, insert the EPP moulded parts separated from the direction-change adapter (3)

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(see section 5.2 Preparatory work for direction-change adapter installation, paragraph 2.) into the duct
adapters.
Facade finish
The facade finish must not be applied to the front surfaces of the duct adapters. Adjust any protruding parts of the duct
adapter as follows (see section 6.1.2 Adapting/shortening the flat ducts).
1. After applying the final facade surface, carefully cut off the protruding material from the EPP body using a sharp
knife or a fine-tooth saw so it is flush with the facade surface.
2. The transition area (white dashes) from the duct adapter (8) to the adjacent material of the facade surface must be
sealed with a suitable weatherproof sealant.

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Finishing the installation
After completing the facade finish, the blanking plugs or the yellow plaster plugs and EPP moulded parts must be removed
from the duct adapters and the preparatory work must be carried out for the discharge grill installation. Proceed as follows.
1. Carefully hammer three M5 EPP inserts (9) into the front holes of each of the duct adapters (8). The EPP inserts
with M5 female thread are used to hold the countersunk screws (11) for the discharge grilles (10).
2. Place the discharge grilles (10) on the duct adapters (8) and fasten them in place with the M5x16 countersunk
screws supplied.
The waterproof swelling sealing tape which is pre-fitted to the back of the discharge grilles must
be in contact all the way around with the EPP material on the front side of the duct adapters (8).
3. The condensate gutter running in the middle of the duct adapter bottom (8) is positioned just above the lower edge
of the condensate outlet slot of the discharge grille (10).
4. Finally, check that the discharge grilles (10) are positioned and secured properly.
5. For further installation of the unit, refer to the ComfoSpot 50 operating instructions.

PDE installation instructions_embrasure module CS50_V0519, EN, subject to change
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