Paul FOCUS 200 Base Series User manual

Version: 1.1_03/2020 EN

Version: 1.1_03/2020 EN
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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. We reserve the right at any time and without previous notification
to change the content of these instructions in part or as a whole.
The information contained in these documents is the property of PAUL Wärmerückgewinnung GmbH. Publication, as
a whole or in parts, requires the written approval of PAUL Wärmerückgewinnung GmbH. In-house duplication,
designated for the evaluation of the product or for proper use, is permitted and not subject to approval.
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All trademarks are recognised, even if they are not separately labelled. A missing label does not mean that an article
or sign is free of trademark rights.
© 2020 PAUL Wärmerückgewinnung GmbH.

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Contents
0Preface .................................................................................................................................... 5
Validity...................................................................................................................................... 5
Target group and standard operation ...................................................................................... 5
Qualification of target group..................................................................................................... 5
0.2.1.1 Users........................................................................................................................................ 5
0.2.1.2 Qualified personnel .................................................................................................................. 5
Standard operation of the unit.................................................................................................. 5
1Introduction ............................................................................................................................ 5
Proper use................................................................................................................................ 5
Ventilation unit.......................................................................................................................... 5
Control panel............................................................................................................................ 5
Safety ....................................................................................................................................... 6
Safety regulations .................................................................................................................... 6
Installation conditions............................................................................................................... 6
Symbols used........................................................................................................................... 6
Warranty and liability................................................................................................................ 6
Warranty provisions ................................................................................................................. 6
Liability ..................................................................................................................................... 7
2Instructions for the user and qualified personnel.............................................................. 7
Product description .................................................................................................................. 7
Type label................................................................................................................................. 8
Frost protection ........................................................................................................................ 8
Joint operation with fireplaces.................................................................................................. 8
Available control modules ........................................................................................................ 9
External control panel .............................................................................................................. 9
2.2.1.1 Control panel operating functions ............................................................................................ 9
2.2.1.2 Signals used to indicate working/maintenance conditions .................................................... 10
External control signal, 0–10 V .............................................................................................. 10
Boost ventilation mode with external boost ventilation button ............................................... 10
Maintenance by the user........................................................................................................ 11
Replacing the unit filters......................................................................................................... 11
Resetting the filter running time ............................................................................................. 13
What should I do in case of a fault?....................................................................................... 13
Disposal ................................................................................................................................. 13
3Instructions for the qualified personnel ............................................................................ 14
Installation requirements........................................................................................................ 14
Transport and packaging ....................................................................................................... 14
Checking the scope of delivery .............................................................................................. 14
Installation .............................................................................................................................. 14
Wall mounting ........................................................................................................................ 14
Mounting the unit on the floor stand ...................................................................................... 16
Connecting the ventilation tubes............................................................................................ 18
Connecting the condensate drain hose ................................................................................. 19
Electrical connections ............................................................................................................ 20
Connecting the control panel ................................................................................................. 20
3.3.1.1 Connecting the connecting cable to the control panel........................................................... 20
3.3.1.2 Connecting the connecting cable to the control board .......................................................... 21
Connecting external boost ventilation buttons ....................................................................... 21
Connecting external sensors ................................................................................................. 21
Connecting an external pre-heater ........................................................................................ 21

4
Commissioning the FOCUS unit ............................................................................................ 22
Readiness for operation ......................................................................................................... 22
Adjusting the air volume flow ................................................................................................. 22
Adjusting the valves ............................................................................................................... 23
Maintenance and repair by the qualified personnel ............................................................... 23
Inspection and cleaning of heat exchanger ........................................................................... 23
Swapping the heat exchanger for the summer box ............................................................... 26
Visualisation of working conditions on the control board ....................................................... 26
Technical description ............................................................................................................. 27
Air connection design versions .............................................................................................. 27
Technical specification ........................................................................................................... 27
Dimensions ............................................................................................................................ 29
FOCUS 200 Base terminal scheme....................................................................................... 30
4Appendices........................................................................................................................... 31
Checklist A Maintenance work for users................................................................................ 31
Checklist B Maintenance work for qualified personnel .......................................................... 32
Commissioning and handover protocol.................................................................................. 33
Air volume protocol ................................................................................................................ 34
Product data sheet ................................................................................................................. 35
Product labels ........................................................................................................................ 37
Declaration of Conformity....................................................................................................... 38

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0 Preface
Validity
This document applies to the following unit types:
•FOCUS 200 Base series (Zehnder Focus 200 Base series)
All the units in the FOCUS 200 Base series are referred to below using the generic product name FOCUS, except
where it is necessary to distinguish between specific types.
This manual deals with the various design variants of the FOCUS heat recovery unit. Possible accessories are only
described to the extent necessary for appropriate operation of the unit. Please refer to the respective instructions for
further information on accessory parts.
Target group and standard operation
This manual is for users and qualified personnel. The activities are only allowed to be carried out by appropriately
trained personnel who are sufficiently qualified for the respective work involved.
Qualification of target group
0.2.1.1 Users
Users must be instructed by qualified personnel as follows:
•Instruction in hazards when handling electrical devices
•Instruction in the system´s operation
•Instruction in the maintenance of the FOCUS unit
•Knowledge of and compliance with this manual, including all safety instructions
0.2.1.2 Qualified personnel
Qualified personnel must have the following qualifications:
•Training in dealing with hazards and risks when installing and operating electrical devices
•Training for the installation and commissioning of electrical devices
•Knowledge of and compliance with the locally applicable building, safety and installation regulations of the
relevant local authorities or municipalities, the regulations of the water and electric utilities and other official
regulations and guidelines
•Knowledge of and compliance with this document, including all safety instructions
Unless otherwise stated in this manual, only a recognised qualified person is authorised to install, connect up,
commission and to service the FOCUS unit.
Standard operation of the unit
This unit can be used by children aged 8 and over and also persons with reduced physical, sensory or mental abilities
or a lack of experience and knowledge provided that they are under supervision or have been instructed on the safe
use of the unit and understand the risks that result from it. Children must not play with the unit. Children must not carry
out cleaning and user maintenance without supervision.
1 Introduction
The FOCUS unit is built to the current state of the art and the recognised safety regulations. The unit is subject to
continuous improvement and development. This is why it is possible for your unit to deviate slightly from the description.
Proper use
Ventilation unit
The FOCUS unit can be used for forced ventilation in homes and offices (and also in industrial buildings subject to
certain restrictions). Any other type of use is considered as misuse. Extreme conditions (e.g. salty air or air polluted
with chlorine) can damage the unit. For reasons of safety, it is prohibited to modify the product or to install components
that are not explicitly recommended or distributed by PAUL Wärmerückgewinnung GmbH for this product.
Control panel
The external control panel allows you to operate the system from a central location. The control panel is only suitable
for use in indoor areas.

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Safety
Always observe the safety regulations and installation conditions in the current operating manual. Failure to observe
the safety regulations, installation conditions, instructions, warnings and comments in this document can result in
personal injury or damage to the unit.
Safety regulations
•Do not make any changes to the unit or to the specifications listed in this document. Such changes can cause
personal injury or lead to reduced performance in the ventilation system
•Always comply with the general locally applicable building, safety and installation regulations of the relevant
local authorities, the regulations of the water and electric utilities and all other official regulations
•Installation, commissioning and maintenance must be carried out by an authorised person or company, unless
otherwise stated in this document
•Always disconnect the unit from the power supply before you start working on the ventilation system
•To eliminate the risk of coming into contact with the running fans, the air ducts must be fastened to the unit
before the power supply is connected, observing a minimum length of 900 mm
•If the mains supply cable of this unit becomes damaged, then it must be replaced by the manufacturer, its
Customer Services department or by a similarly qualified specialist in order to avoid hazards
•Do not disconnect the unit from the power supply unless instructions to the contrary are listed in the manual
•The control unit can be damaged by static charge; which is why you must always take measures to prevent
electrostatic discharge when handling the control unit (e.g. antistatic wrist strap)
•Replace the filters (at least) every six months. This ensures a pleasant and healthy air quality and the unit will
be protected against contamination
•Only operate the unit with a closed housing
•Keep this document in the vicinity of the unit during the entire service life of the ventilation unit
Installation conditions
•Check that the installation area is frost-protected
•When choosing an installation location, PAUL recommends that you avoid areas with a high average level of
humidity (ambient conditions for indoor climate control system must not continuously exceed 70% RH at 22°C)
•The acceptable temperature range for the air being moved is between -20°C and +40°C
•The unit must not be installed in rooms subject to explosion hazards
•Inside wet rooms, the unit may only be installed outside of protection zones 1 and 2 in accordance with DIN
57100/VDE 100 Part 701
•The unit must not be used for extracting combustible or explosive gases
•Check whether the electrical installation is suitable for the maximum power of the unit. The values for the electrical
input power can be found in the “Technical specification” chapter
•Check that the installation area of the unit meets the requirements in the “Installation requirements” chapter
Symbols used
You will find the following symbols in this document:
Important note!
Caution: Risk of affecting the operation of the ventilation system or damaging the unit!
Caution: Risk of personal injury!
Warranty and liability
Warranty provisions
The manufacturer gives a warranty of 24 months starting from the installation date, or a maximum 30 months starting
from the date of manufacture, for the unit. Warranty claims can only be asserted for material defects and/or design
faults that have occurred during the warranty period. Repair work under the terms of the warranty is only allowed to be
carried out with the prior written approval of PAUL Wärmerückgewinnung GmbH. A warranty on spare parts is only
then given if those parts have been delivered by the manufacturer and were installed by a specialist technician
recognised by the manufacturer.
The warranty shall be null and void if:
•The warranty period has elapsed
•The unit is operated without filters approved by the manufacturer of the ventilation unit
•Parts are installed that are not supplied by the manufacturer

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•The unit is used improperly
•The defects occur as a consequence of an incorrect connection, improper use, or from system contamination
•Unauthorised changes or modifications to the system are made
Liability
The FOCUS unit has been developed and produced for use in what are known as comfort ventilation systems. Every
other form of use is deemed “improper use” and can result in damage to the FOCUS unit or in personal injury, for which
the manufacturer cannot be held liable. The manufacturer shall not be liable for any kind of damage that can be
attributed to the following causes:
•Failure to observe the instructions listed in this manual pertaining to safety, operation and maintenance
•Improper installation
•Installation of spare parts that were not delivered or stipulated by the manufacturer
•Defects as a consequence of an incorrect connection, improper use or from system contamination
•Normal wear
2 Instructions for the user and qualified personnel
Product description
The FOCUS unit is a ventilation unit with heat recovery for healthy, well-balanced and energy-saving comfort
ventilation. A comfort ventilation system extracts foul-smelling waste air from areas such as kitchens, bathrooms and
toilets and conveys an identical quantity of fresh air into living rooms, bedrooms and children's rooms.
For heat recovery, the unit types in the FOCUS 200 Base HRV series feature highly efficient cross-counterflow heat
exchangers made from plastic. An optional summer box module can be used instead of the heat exchanger for thermal
separation of the two airflows. The housing is made from sheet metal with an anthracite powder coating. The high-
quality polypropylene inner lining ensures the necessary thermal insulation and unit soundproofing.
The FOCUS unit has two maintenance-free 230 VAC centrifugal fans with an integrated power supply unit and
electronic commutation. The fans run at a constant volume flow to keep the air volume constant at any selected fan
speed. The air volume is not affected even if the filters become soiled.
Inside the unit, there is one filter with filter class ISO coarse ≥70% (G4) for the outdoor air and another one for the
extract air. These consist of a synthetic non-woven filter medium with a polypropylene frame. As an option, filters with
filter class ISO ePM1 ≥60% (F7) can be used for the outdoor air. The filters are accessed via the front panel.

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Fig. 1: Main components of the FOCUS heat recovery unit
Item Description
A Fastening sheet
B Control cover plate
C Control board
D Filter (2x)
E Summer box – Module that keeps the airflows thermally separate
F Housing made from coated sheet steel
G EPP moulded parts
H Condensate drain screw connection
I Fans (2x)
J EPP foam cover for fan (2x)
K Heat exchanger with strap and condensate tray
L EPP foam cover with strap for filter and heat exchanger
M Front panel made from coated sheet steel
Tab. 1: FOCUS main components
Type label
The type label identifies the product unequivocally. You will need the details on the type label for the safe use of the
product and in case of questions for service. The type label is located on the same side of the unit as the air connections
and must remain permanently attached to the product.
Frost protection
The FOCUS unit is equipped with automatic frost protection, which prevents the heat exchanger from freezing should
the outside air temperature drop to a very low level. The temperature limit for the outdoor air on the unit side is -3°C. If
the temperature drops below this threshold value, the fans are switched off temporarily, unless effective external frost
protection is in place on the system side. If an external electric pre-heater (optional) is installed, it is activated by the
unit control system if the temperature drops below the threshold value of 0°C. The only electric pre-heater that may be
used for this purpose is the iso defroster heater DN 125 (Zehnder art. no 527003450) .
If an optional hydraulic heating register is installed downstream, please note that the supply air
temperature is not monitored to protect it against freezing.
Joint operation with fireplaces
If the unit is to be operated at the same time as a fireplace (e.g. a fireplace with a chimney or flue), the qualified
personnel must observe the relevant standards and regulations. In cases where fireplaces and ventilation systems are
F
I J K M
H
G
L
C
B
A D E

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reliant on indoor air and there is a risk of dangerous low pressure occurring during operation in the room where the
fireplace is installed, the systems may only be operated together if there is a suitable safety feature (differential pressure
sensor) installed or an alternative measure specific to the system.
Available control modules
The FOCUS unit can be operated with the following control modules:
•External control panel (W x H x D in mm: 71 x 71 x 25)
•External control signal (0–10 V)
•External boost ventilation button(s) (as many as required, potential-free)
External control panel
To control the fans, the control panel has a rotary knob with an infinitely variable adjustment range (first scaling segment
on the intensity scale) for the air volume flow.
The two ON/OFF buttons are used to select the operating mode. Either normal mode (both ventilators on), or extract
air (only exhaust air ventilator on) or supply air mode (only supply air fan on) can be selected. The selected operating
mode is indicated by green a LED of the respective symbol. The operating functions are carried out with the button
boost ventilation mode / reset filter runtime. The operating LED lights up red to indicate that the away or boost ventilation
operating modes are possibly active or that the filters should be inspected.
2.2.1.1 Control panel operating functions
Description Explanation
Intensity scale
Positioning rotary knob
Operating mode: Ventilation with continuous air volume flow according to the intensity
scale
Rotary knob turned to 1st scaling segment on the left: lowest air volume flow
Rotary knob turned to 1st scaling segment on the far right: highest air volume flow
Rotary knob turned to point within 1st scaling segment: air volume flow proportional to the
intensity scale
Away mode: Ventilation with lowest intermittent air volume flow
Rotary knob turned to 2nd scaling segment: 5 minutes ON and 1 minute OFF
Rotary knob turned to 3rd scaling segment on the far left: 1 minute ON and 5 minutes
OFF
Rotary knob turned to points within 2nd and 3rd scaling segment: ON/OFF cycle-time
ratio adapted to indirectly proportional
Extract air mode button Pressing this button so that it clicks into place activates extract air mode and switches on
the exhaust air fan. Pressing it again deactivates extract air mode.
If the ventilation unit is being operated together with a fireplace, do not use
this button unless supply air mode is activated at the same time!
Simultaneous operation of a ventilation system and fireplace imposes
more stringent safety requirements with regard to low pressure monitoring and a
switch-off function is required for the ventilation unit.
Supply air mode button Pressing this button so that it clicks into place activates supply air mode and switches on
the supply fan. Pressing it again deactivates supply air mode.
Normal mode Pressing both buttons so that they click into place switches on both fans.
Fig. 2: Control panel operating controls and indicators
Operating LED
Away mode /
Boost ventilation mode /
Filter control
ON/OFF button
Supply air mode
ON/OFF button
Extract air mode
Rotary knob for adjusting the
ventilation intensity
Intensity scale Operating mode
1st scaling segment
Function button
Boost ventilation mode /
Reset filter runtime
Extract air symbol with green LED Supply air symbol with green LED
Present position rotary knob
Intensity scale Away mode
2nd and 3rd scaling segment

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Boost ventilation
mode/reset filter
running time button
Function button for boost ventilation mode:
Pressing this button activates boost ventilation for 15 minutes with an air volume flow
corresponding to the rotary knob being turned all the way to the right. At the end of the 15-
minute boost ventilation time, the unit reverts to the previous air volume in the currently
active mode. You can cancel boost ventilation mode at any time by pressing this button
again for > 3 s.
Function button for reset filter running time:
To ensure cyclic filter inspection, the control has an integrated operating hours counter
with a fixed running time of 180 d. The boost ventilation mode/reset filter running time
button allows you to reset the filter running time. To restart the filter running time, press
and hold this button for > 3 s.
If the filter running time is reset before the end of 180 d by pressing this button for > 3 s,
the LED fan symbol will flash rapidly four times in succession to confirm the reset operation.
No reset command can be issued while boost ventilation mode is active.
Tab. 2: External control panel operating functions
2.2.1.2 Signals used to indicate working/maintenance conditions
Symbol LED signal Function / Meaning / Action required
Both LEDs light up Normal mode (extract air and supply air)
Extract air symbol
LED lights up
Extract air mode is active (extract air only)
Supply air symbol
LED lights up
Supply air mode is active (supply air only)
Fan symbol LED
lights up
Ventilation boost mode is active
Ventilation boost mode can be selected while in
any other mode.
Fan symbol LED
flashes
Away mode is active
Away mode can be selected while in any other
mode.
Fan symbol LED
flashes rapidly
Filter running time has expired; inspect or replace filter
Boost ventilation mode cannot be activated until
a reset command is issued.
Tab. 3: Functions assigned to LED signals
External control signal, 0–10 V
The ventilation unit can be operated with an external 0–10 V control signal. When a 0–10 V analogue signal is applied,
it is interpreted as a control signal for the fan speed. The current position of the rotary knob on the scale marks the
point at which the external control voltage becomes effective.
To make use of the entire external 0–10 V control range, control range, the rotary knob must be in
position 3
rd
scaling segment.
Boost ventilation mode with external boost ventilation button
Boost ventilation buttons are usually installed in rooms from which air is extracted, such as bathrooms, toilets or
kitchens. In this way, maximum ventilation can be activated locally within these rooms for a brief period to enable rapid
extraction of high humidity and odours. When this control module is activated, the functional features and displays
described for boost ventilation mode apply. Boost ventilation mode is restarted each time it is activated and interrupts
the currently set air volume flow. Afterwards, the unit reverts to the previously active working condition.

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Maintenance by the user
For the user, maintenance of the ventilation unit and system is limited to changing the filters periodically and cleaning
the supply and extract air valves. The filters should be inspected every three months. Filter replacement should be
carried out as necessary, but no later than once every six months. As part of this process, please inspect the other
filters in the ventilation system and change them if necessary. The filter mats should be replaced or cleaned on the
extract air valves (e.g. bathroom, kitchen, WC) every 2–3 months or when checking the degree of contamination at
one's own discretion.
If the maintenance work is not carried out regularly, this will affect the functionality of the comfort
ventilation system in the long run!
Replacing the unit filters
The system must not be operated without filters. During filter replacement and maintenance work, the
ventilation unit must remain switched off!
Two high-quality original filters from the manufacturer are installed in the FOCUS unit. The filters inside the FOCUS
unit must be inspected whenever the control panel signals that this is necessary. In doing so, proceed as follows:
1. Disconnect the unit from the mains power supply.
2. Press the two snap fasteners Aon the bottom of the unit.
Fig. 3: Pressing the snap fasteners
3. Remove the front panel Bgradually as indicated by the arrows. To do this, open the front panel in the snap
fastener area at an angle of no more than 15° and unhook it from the lock seam of the housing.
Fig. 4: Opening the front panel
A
B

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4. Use strap Cto pull the EPP foam cover Dfor the filters and heat exchanger out of the EPP housing. To do this,
grip the strap at one end and pull while using your other hand to support the unit.
Fig. 5: Pulling out the EPP foam cover for the filters and heat exchanger
5. Holding them by the strap, pull the filters Eout of the filter compartments.
Fig. 6: Pulling out the filters
6. On the filter frame of each filter, there is an arrow to indicate the prescribed direction of flow. Insert the new
filters according to their designated direction of flow F.
D
C
E

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Fig. 7: Inserting the new filters according to their direction of flow
Depending on the unit type, filters with filter class ISO ePM1 ≥60% (F7) must be inserted into
the filter compartment for the outdoor air connector in accordance with the type label. The
outdoor air connector is indicated by the symbol
on the air connections sticker.
7. Attach the EPP foam cover to enclose the slide-in filter compartments and heat exchanger.
8. Hook the front panel into the lock seam of the housing. Then press it down on the housing in the snap fastener
area until it engages in the snap fasteners.
9. Reconnect the unit to the mains.
Resetting the filter running time
After completing the filter replacement, the counter for the filter running time must be reset. To reset the filter running
time, press and hold the boost ventilation mode/reset filter running time button for > 3 s. The LED on the fan symbol
stops flashing rapidly.
Use checklist A to document the maintenance work completed.
What should I do in case of a fault?
Contact the installation technician in case of a fault. Note down the type of your FOCUS unit; for more on this, see the
type label on the side of the unit where the air connections are located.
The mains connection must always be present, unless the FOCUS unit has to be shut down due to a serious fault, for
maintenance work or for some other urgent reason.
As soon as the unit is disconnected from the mains, the apartment will no longer be mechanically
ventilated. This may result in moisture and mould problems in the apartment. Therefore, you should
avoid switching off the FOCUS unit for long periods.
Disposal
Discuss with your supplier what you should do with your FOCUS unit at the end of its life cycle. If you cannot return
your FOCUS unit, do not deposit it in the normal household waste, but rather contact your local authority for options to
recycle components or to process materials in an environmentally friendly way.
F

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3 Instructions for the qualified personnel
Installation requirements
The following requirements must be assured for the correct installation:
•Installation in accordance with the general and locally applicable safety and installation regulations of the electric
and water utilities etc. and in accordance with the regulations stipulated in this manual
•Frost-free indoor area
•Power supply 230 VAC, 50–60 Hz
•Sufficient space for connecting the ventilation tubes and for maintenance work
Transport and packaging
Proceed with care when transporting and unpacking the FOCUS unit.
Do not remove the unit packaging until right before installation! Before and during interruptions to
installation, the ventilation tube connections must be closed with the air connector sealing caps to
prevent construction site dust and moisture from entering.
Checking the scope of delivery
If the delivered product is found to be damaged or incomplete, please contact the supplier immediately. Included in the
scope of delivery are:
•HRU FOCUS with power cable;
Check the type label to make sure that the unit is the right one (type, version as per type label)
•Fastening sheet with two self-adhesive spacers (rubber buffers)
•Control panel
•Translation of the original manual
•Product labels showing energy efficiency
•Floor stand (optional)
Installation
The distances from adjacent surfaces shown in Fig. 8 must be observed. Please note that these clearances are not
shown to scale. The surfaces are allowed to be made from flammable materials.
Fig. 8: Distances from adjacent surfaces in mm
Make sure you leave at least 1 m clear in front of the FOCUS unit for subsequent maintenance work.
The FOCUS unit must be installed horizontally. Before mounting the unit on a wall, check that the wall construction has
the necessary load-bearing capacity (net weight of the FOCUS unit is 25 kg) and that the fastening sheet can be
mounted securely. With inappropriate walls, we recommend using the floor bracket (available as an option) to mount
the unit on the floor. This will keep any structure-borne noise transfer to an absolute minimum.
Wall mounting
Proceed as follows for wall mounting:
1. Mount the supplied fastening sheet Ahorizontally on the wall with the lugs Bpointing upwards. Use the slotted
holes Cto fix it in place with suitable fixing materials.

15
Fig. 9: Fastening sheet for wall mounting
Observe the minimum distance required in relation to the finished floor!
Fig. 10: Distance from upper edge of finished floor for wall mounting (LEFT-hand version)
2. Stick one of the self-adhesive spacers supplied Din each corner on the rear of the unit.
Fig. 11: Mounting the spacers
3. Hook the FOCUS unit onto the fastening sheet by inserting the lugs Binto the slots Ein the lock seam at the
top of the rear cover.
A
B
D
C

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Fig. 12: Hooking the unit into the fastening sheet
Mounting the unit on the floor stand
The dimensions of the floor stand are as follows: footprint = 620 x 292 mm; variable height adjustment = between
280 mm and 320 mm using adjustable feet. The floor stand consists of two long base parts (each with two adjustable
feet) and two short base parts.
Fig. 13: Individual parts of the floor bracket
Assemble the individual parts of the floor stand as shown in the illustrations. In doing so, proceed as follows:
1. Working in the direction of the arrow, place the short base part at right angles to the long base part at a staggered
height
.
Fig. 14: Attaching the base parts
2. Working in the direction of the arrow, push the lugs Aof the short base part into the guide slots Bof the long
base part so that they engage and fix the two base parts together.
E
B

17
Fig. 15: Fixing the two base parts
3. Now connect the other two base parts in the same way.
Fig. 16: Two sets of base parts fixed together
4. Mount the fastening sheet Con the long base part with the lugs pointing upwards. To do this, screw the two
Parker screws Dinto the holes provided Eon the base part so that they go through the fastening sheet.
Fig. 17: Mounting the fastening sheet on the base part
5. Now use the height-adjustable feet Fto adjust the fully assembled floor stand on the designated set-up area so
that it is plumb vertical and stable. Then fix it in this height position with the lock nuts of the adjustable feet.
A
B
C
E
D

18
F
Fig. 18: Adjusting the floor bracket
6. Place the FOCUS unit on the floor stand so that the lugs of the fastening sheet hook into the slots in the lock
seam at the bottom of the unit's rear cover. See Fig. 12.
Connecting the ventilation tubes
The following points must be observed when installing the ventilation tubes:
•Attach the different types of ventilation tube provided with the ventilation system to the relevant connectors
according to whether the unit is the LEFT- or RIGHT-hand version (see air connections sticker on control cover
plate)
•Remove the sealing caps from the air connectors
•Using ventilation tube materials with the lowest possible air resistance, connect the ventilation technology
components to one another so that they are air-tight
•The unit connectors are made from EPP and have a sleeve size of DN 125.
•The outdoor air and exhaust air tubes must be insulated in such a way that they are sealed against vapour
diffusion. This prevents condensate from forming on the outside of the ventilation tubes
•If – when installing the exhaust air tube – it is not possible to avoid a low point between the exhaust air connector
on the unit and the exhaust air outlet, a connection to the condensate drain must be provided at this point. This
is because the exhaust air is saturated with steam at cold outside temperatures and droplets may be deposited
on the inner wall of the tube
•The exhaust air pipework that runs from the unit connector to the roof terminal must not be straight. Otherwise,
any ice that forms could drop onto the blades of the exhaust air fan when it thaws, causing damage to the
blades.
Fig. 20: Drainage arrangement for outdoor and exhaust air tubes
Fig. 19: How the air connections are arranged on the LEFT- and RIGHT-hand unit versions

19
•If a silencer is fitted at the exhaust air connector, it must be routed upwards with a bend to prevent it being
drenched by condensate running back from the exhaust air tube
•If the exhaust air is routed above the roof, a double-walled or insulated roof passage must be installed. This
prevents condensate from forming between the roof boards
•For the supply and extract air ducts, we recommend using thermal and vapour-tight insulation to prevent
unnecessary temperature losses in both the summer and winter
Connecting the condensate drain hose
In the heat exchanger, the warm extract air is cooled by the outdoor air. This causes the moisture in the room air to
condense inside the heat exchanger. The condensate that forms in the heat exchanger is routed to the sink valve. The
sink valve screw connection Ahas a 1¼" male thread for the siphon. This is located on the bottom of the FOCUS unit,
with the exact position varying according to the unit version and design.
Fig. 21: Sink valve screw connection on LEFT-hand unit version
A siphon must be attached to the screw connection so that the upper edge of the surge tank is at least 60 mm below
the screw connection and the minimum liquid level is 60 mm.
Fig. 22: Condensate drain (LEFT-hand version)
The siphon must not be connected directly to the sewer tunnel network (e.g. whereby the condensate
flows freely into a funnel with a siphon connected to the sewer pipe)
A

20
Siphons can dry out. The siphon must always be topped up with water when:
•The unit is commissioned
•The siphon starts making (slurping/gurgling) noises
We generally recommend using a waterless siphon. (No functional restrictions if it dries out,
no need for a 2
nd
siphon)
Electrical connections
Electrical connections are to be implemented in accordance with the standards specific to the
relevant country and by qualified personnel only!
The FOCUS unit must be electrically connected to the mains power supply via the mains unit lead with a CEE 7/4 plug.
This is to be plugged into a 230 VAC CEE 7/4 socket. The control panel cable and cable for the optional pre-heater
should be connected directly to control board A. To do this, release the 4 screws Bin the cover plate and connect the
wires of the cables to the relevant clamping points on the control board. This involves feeding the cables through M16
cable glands after pushing out the required quantity of pre-punched cable guides C.
Fig. 23: Side of the housing for the electrical connections
Item Description
A Control board
B Cover plate screws (4x)
C Pre-punched cable guide (2x) for M16 cable gland
3.7.4 FOCUS 200 Base terminal scheme
Tab. 4: Overview of the electrical connections
Connecting the control panel
3.3.1.1 Connecting the connecting cable to the control panel
The external control panel must be installed inside a standardised switchbox.
To serve as a connecting cable between the control panel and unit control board, we recommend using an 8-core 2x4
UTP data cable. 4 of the wires should be connected to clamping points X.01 to X.04 in accordance with Tab. 5. The
maximum cable length is 25 m.
C
B
B
A