Zehnder Rittling Eversky 500 Manual

always the best climateInstallation, Service and User Manual
Decorative radiators Comfortable indoor ventilation Heating and cooling ceiling Clean air solutions
Zehnder
Eversky

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1. Technical specifications ______________________________________________________________________________________________________ 6
1.1. General dimensions__________________________________________________________________________________________________________ 6
1.2. Specific dimensions of the hot water coil ______________________________________________________________________________________ 7
1.3. Electrical performance data __________________________________________________________________________________________________ 8
1.4. External connections ________________________________________________________________________________________________________ 8
1.5. Air duct connections _________________________________________________________________________________________________________ 8
2. General information __________________________________________________________________________________________________________ 9
3. On receipt of the equipment __________________________________________________________________________________________________ 9
3.1. Checks _____________________________________________________________________________________________________________________ 9
3.2. Unpacking __________________________________________________________________________________________________________________ 9
3.3. Storage _____________________________________________________________________________________________________________________ 9
4. Disposal ____________________________________________________________________________________________________________________ 9
5. Packaging and packing _______________________________________________________________________________________________________ 9
6. Identification and labelling ___________________________________________________________________________________________________ 10
7. Composition_________________________________________________________________________________________________________________11
7.1. General composition _________________________________________________________________________________________________________ 11
7.2. Electrical board_____________________________________________________________________________________________________________ 13
7.3. Control terminals and user connections ______________________________________________________________________________________ 14
8. Installation _________________________________________________________________________________________________________________ 15
8.1. Handling in an upright position_______________________________________________________________________________________________ 15
8.2. Lifting in horizontal position _________________________________________________________________________________________________ 15
8.3. Installation precautions _____________________________________________________________________________________________________ 15
8.4. Core drilling of wall or ceiling ________________________________________________________________________________________________ 16
8.5. Installation and fixing on the ceiling __________________________________________________________________________________________ 17
8.5.1. Fixing the bracket to the ceiling______________________________________________________________________________________________ 18
8.5.2. Fitting the unit to the bracket ________________________________________________________________________________________________ 19
8.5.3. Installation of the unit in a false ceiling _______________________________________________________________________________________ 20
8.6. Access to the inside of the unit ______________________________________________________________________________________________ 20
8.7. Air duct connections ________________________________________________________________________________________________________ 21
8.8. Connecting the power supply ________________________________________________________________________________________________ 22
9. Electrical connection of external devices______________________________________________________________________________________ 23
9.1. Alarm output (DO5 ) - 24 Vac to be relayed ___________________________________________________________________________________ 23
9.2. Heat demand output (DO3) - 24 Vac to be relayed_____________________________________________________________________________ 23
9.3. V3V heat output (AO1 - 0-10 V) ______________________________________________________________________________________________ 24
9.4. Reduced speed forced operation input (or PV=low speed) (DI3) ________________________________________________________________ 25
9.5. Normal speed forced operation input (or GV=high speed) (DI4)_________________________________________________________________ 25
9.6. External stop input (DI5) ____________________________________________________________________________________________________ 26
9.7. Fire protection input (DI8) ___________________________________________________________________________________________________ 26
9.8. RS485 communication (MODBUS RTU or BACnet MS/TP) (port P1) ____________________________________________________________ 26
9.9. TCP-IP communication (MODBUS TCP / BACnet IP / Webserver) (TCP/IP port)__________________________________________________ 27
9.10. HMI - human/machine interfaces ____________________________________________________________________________________________ 27
9.10.1. General information_________________________________________________________________________________________________________ 27
9.10.2. E3-DSP-CLD _______________________________________________________________________________________________________________ 28
9.10.3. Zehnder ED-Touch __________________________________________________________________________________________________________ 28
9.11. Remote fire service stop (RFS)_______________________________________________________________________________________________ 28
10. Condensate drainage _______________________________________________________________________________________________________ 28
10.1. Drainage by gravity _________________________________________________________________________________________________________ 28
10.2. Drainage via condensate pump (optional)_____________________________________________________________________________________ 28
10.2.1. General information_________________________________________________________________________________________________________ 28
10.2.2. Composition of the condensate pump kit _____________________________________________________________________________________ 29
10.2.3. Operating principle _________________________________________________________________________________________________________ 29
10.2.4. Maintenance _______________________________________________________________________________________________________________ 30
10.2.5. Performance and operating limits ____________________________________________________________________________________________ 30
10.2.6. Installation of the condensate pump__________________________________________________________________________________________ 30
10.2.7. Installation of the anti-siphoning device ______________________________________________________________________________________ 32
10.2.8. Operational test ____________________________________________________________________________________________________________ 32
10.2.9. Diagnosis __________________________________________________________________________________________________________________ 32
11. General operation___________________________________________________________________________________________________________ 33
11.1. Unit start-up sequence ______________________________________________________________________________________________________ 33
11.2. Stop sequence _____________________________________________________________________________________________________________ 34
12. Start / Stop of the unit_______________________________________________________________________________________________________ 34
13. Starting up the unit__________________________________________________________________________________________________________ 34
14. Setting up the controller and functions________________________________________________________________________________________ 35
14.1. Access level selection_______________________________________________________________________________________________________ 35
Contents
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14.2. Selecting the display language_______________________________________________________________________________________________ 35
14.3. Setting the clock (RTC)______________________________________________________________________________________________________ 35
14.4. Setting the time programmes ________________________________________________________________________________________________ 36
14.5. Ventilation and CO₂ management setpoint adjustment_________________________________________________________________________ 38
14.6. Setting the temperature setpoints____________________________________________________________________________________________ 40
14.7. Setting the night cooling function ____________________________________________________________________________________________ 40
14.8. Setting the fire function _____________________________________________________________________________________________________ 41
14.9. MODBUS RTU communication (RS485) ______________________________________________________________________________________ 42
14.10. BACnet MS-TP communication (RS485) ______________________________________________________________________________________ 42
14.11. MODBUS TCP communication_______________________________________________________________________________________________ 43
14.12. BACnet IP communication___________________________________________________________________________________________________ 43
15. Backup / restore settings____________________________________________________________________________________________________ 44
15.1. User settings _______________________________________________________________________________________________________________ 44
15.2. Factory settings ____________________________________________________________________________________________________________ 44
16. Troubleshooting – maintenance ______________________________________________________________________________________________ 45
16.1. Supply air filter pressure switch (fresh air) DEPFS _____________________________________________________________________________ 45
16.1.1. Setting the tare_____________________________________________________________________________________________________________ 45
16.1.2. Electrical connections_______________________________________________________________________________________________________ 45
16.1.3. Air connections_____________________________________________________________________________________________________________ 45
16.2. DEPS and DEPR fan runback pressure switches_______________________________________________________________________________ 46
16.2.1. Setting the tare_____________________________________________________________________________________________________________ 46
16.2.2. Electrical connections_______________________________________________________________________________________________________ 46
16.2.3. Pressure switch_____________________________________________________________________________________________________________ 47
16.3. Temperature sensors PT1000 ________________________________________________________________________________________________ 48
17. CO₂ concentration sensor ___________________________________________________________________________________________________ 49
17.1. Electric heating coil (BE) ____________________________________________________________________________________________________ 50
17.2. Defrost coil (DBE)___________________________________________________________________________________________________________ 50
17.3. Safety thermostats THS and THSD___________________________________________________________________________________________ 50
17.3.1. Location ___________________________________________________________________________________________________________________ 50
17.3.2. Electrical connections_______________________________________________________________________________________________________ 50
17.3.3. Manual reset _______________________________________________________________________________________________________________ 51
17.4. Anti-freeze protection thermostat THA (hot water coil)_________________________________________________________________________ 51
17.4.1. Location ___________________________________________________________________________________________________________________ 51
17.4.2. Nominal setting of the trip point______________________________________________________________________________________________ 51
17.4.3. Electrical connections_______________________________________________________________________________________________________ 51
18. General wiring diagram ______________________________________________________________________________________________________ 52
19. Customer connections wiring diagram ________________________________________________________________________________________ 54
20. Regular maintenance________________________________________________________________________________________________________ 55
20.1. General information_________________________________________________________________________________________________________ 55
21. Troubleshooting ____________________________________________________________________________________________________________ 56
21.1. Simplified diagnostic method ________________________________________________________________________________________________ 56
21.2. Classification of alarms _____________________________________________________________________________________________________ 56
21.3. Alarm actions_______________________________________________________________________________________________________________ 57
21.4. Alarm duration______________________________________________________________________________________________________________ 57
21.5. Alarm threshold ____________________________________________________________________________________________________________ 57
21.6. Alarm state (or status) ______________________________________________________________________________________________________ 57
21.7. List and meaning of alarms __________________________________________________________________________________________________ 58
21.8. Acknowledgement procedure for a class A or B alarm _________________________________________________________________________ 65
21.9. Acknowledging the filter counter alarm ("maintenance inspection required") ____________________________________________________ 65
21.10. Presence of active alarms ___________________________________________________________________________________________________ 65
21.11. Alarm history _______________________________________________________________________________________________________________ 66
22. Replacing filters ____________________________________________________________________________________________________________ 66
23. Replacing the internal memory battery________________________________________________________________________________________ 66
24. Air performance ____________________________________________________________________________________________________________ 67
24.1. Zehnder Eversky 500 _______________________________________________________________________________________________________ 67
24.2. Zehnder Eversky 750 _______________________________________________________________________________________________________ 67
24.3. Zehnder Eversky 900 _______________________________________________________________________________________________________ 68
24.4. Zehnder Eversky 1100_______________________________________________________________________________________________________ 68
25. Variable exchange tables ____________________________________________________________________________________________________ 69
25.1. Machine status (read only) __________________________________________________________________________________________________ 70
25.2. Setting setpoints (reading/writing) ___________________________________________________________________________________________ 71
25.3. Alarm status (read only) _____________________________________________________________________________________________________ 72
26. Commissioning report_______________________________________________________________________________________________________ 73
Declaration UE of conformity_________________________________________________________________________________________________ 74
Contents
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Legal regulations
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 operating manual. We reserve the right at any time and without prior notification to
change the content of these instructions in part or as a whole.
The information contained in these documents is the property of Zehnder Group. Any form of publication, whether in
whole or in part, requires the written approval of Zehnder Group. In-house duplication, designated for the evaluation of
the product or for proper use, is permitted and not subject to approval.
Zehnder manufacturer’s warranty
The current warranty terms can be obtained in paper form using the normal distribution channels.
Trademarks
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.
© 2021 Zehnder Group
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Safety and environmental instructions
In accordance with current regulations, the appliance must be installed and maintained exclusively by qualified technical
personnel authorised for this type of appliance and work.
Use the necessary Personal Protective Equipment to avoid damage related to electrical, mechanical (injuries from
contact with metal sheets, sharp edges, etc.), acoustic risks, etc.
Do not use the appliance for any purpose other than that for which it is designed. This device may only be used to
convey air free of hazardous compounds, construction dust, etc.
Move the appliance as described in the handling section.
Connect to earth in accordance with the applicable standards. Never switch on an unearthed appliance.
Before working on the unit, shut off the power and wait for the moving parts of the ventilation unit to come to a
complete stop before opening the doors.
During operation, inspection panels, doors and hatches must always be fitted and closed.
The unit must only be switched on and off via the proximity switch.
Safety and control equipment must not be removed, short-circuited or disabled
When working on the unit, be aware of the temperature that some components can reach (water coil or electrical
resistors).
The installation must comply with the fire safety regulations.
All waste production must be treated in accordance with the regulations in force.
It is the responsibility of the installer of the equipment to ensure compliance with the regulations on noise emissions
inside the building and to adapt the installation and placement conditions if necessary.
We decline all liability for damage resulting from misuse of the equipment, unauthorised repair or modification or failure
to observe these instructions.
Danger and warning:
■Operation or situation that may present a danger
■Warning about the instructions to be followed
Reading the documentation that accompanies the product is mandatory.
Safety and environmental instructions
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1. Technical specifications
1.1. General dimensions
Ø
mm
A
mm
A1
mm
A2
mm
B
mm
C
mm
E
mm
E1
mm
E2
mm
F
mm
F1
mm
M
mm
M1
mm
N
mm
Weight
kg
250 1670 490 645 815 445 1297 185 230 742 384 332 170 130 132
315 1985 555 830 900 510 1547 220 260 927 449 415 170 170 170
315 1985 555 830 900 510 1547 220 260 927 449 415 170 170 180
315 2365 615 1085 1050 530 1924 220 280 1185 510 565 170 190 220
B
G1
E1
E2
T
T
9
J1
J
A
C
N
A1 ( 1 ) A1 ( 1 )A2 ( 1 )
M
110
F1 F
80 80
E
F1
J2
J3
G2
110
M1
B
G1
E1
E2
T
T
9
J1
J
A
C
N
A1 ( 1 ) A1 ( 1 )A2 ( 1 )
M
110
F1 F
80 80
E
F1
J2
J3
G2
110
M1
(1) Size of opening panels
Location of inlet and outlet
connections according to the
chosen configuration
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1.2. Specific dimensions of the hot water coil
Hot water coil connections
Ø Side Top
T
Male
J
mm
J1
mm
G1
mm
J2
mm
J3
mm
G2
mm
3/8 55 135 725 55 675 320
3/8 90 140 835 90 750 385
3/8 90 140 835 90 750 385
3/8 90 160 985 80 865 445
Hot water coil
Hot water coil
T
Configuration
Input/output on top
(24 mm through-hole diameter)
Configuration
Side input/outputs
(24 mm through-hole diameter)
Hydraulic connections G 3/8" Male with flat seal surface.
Internal piping and seals not provided.
Provide sufficient clearance for the 3-way valve.
The hot water inlet is at the bottom, the outlet at the top.
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1.3. Electrical performance data
Premium BE
Infinite BC
Premium BC Infinite BE
Model Fan power
(W)
Use
temp.
(°C / °C)
Protection
index / class
Thermal pro-
tection *
Power
(W)
Supply
voltage
(V/Ph/Hz)
Protection
current
(A)
Supply
voltage
(V/Ph/Hz)
Protection
current
(A)
Supply
voltage
(V/Ph/Hz)
Protection
current
(A)
500 2 x 169 -25 / 60 IP54/B PTI 1000 230/1/50 7. 0 230/1/50 2.7 230/1/50 11.4
750 2 x 170 -25 / 60 IP54/B PTI 1250 230/1/50 8.2 230/1/50 2.8 230/1/50 13.7
900 4 x 169 -25 / 60 IP54/B PTI 1250 230/1/50 10.8 230/1/50 5.3 230/1/50 16.3
1100 4 x 170 -25 / 60 IP54/B PTI 1250 230/1/50 11.0 230/1/50 5.5 230/1/50 16.5
* PTI: Integrated thermal protection
1.4. External connections
(A) or (B): Power supply
Condensate drainage with lifting pump (hose ø6x9)
(B) Condensate drainage by gravity (ø10x16 pipe)
(C) Removable connection/full panels
1.5. Air duct connections
The Zehnder Eversky ventilation unit has modular
connections on the fresh air inlet and return air outlet
allowing 9 configurations of air duct connections to adapt to
each specific installation.
This removable connection panel system is patented. Round
unit connectors with lip seals to ensure the air tightness of
the networks (ATEC CSTB no. 13-224-12).
The position of the panels can be changed at the end of the
installation of the unit, from the inside of the unit.
Extracted air
outlet amount
Fresh air intake
amount
Possible combinations of fresh air intake and extracted
air outlet connections.
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2. General information
Zehnder Eversky is a range of decentralised dual-flow ventilation units offering very high energy and acoustic
performance, including CO₂ regulation as standard.
Installed directly in the room or space to be treated, it eliminates the need for a complex and costly air distribution
network.
Fitted with a high-efficiency static heat recovery unit, electric or water heating coils, F7 supply air filtration and
reinforced acoustic insulation, Zehnder Eversky ensures the hygiene and comfort expected in demanding rooms while
limiting energy consumption.
The Zehnder Eversky unit is equipped as standard with an EASY control system, communicating in MODBUS or BACnet
(choice of language can be activated locally). It has an LCD display for easy commissioning and maintenance.
Zehnder Eversky is delivered ready to use → PLUG&PLAY - SET&FORGET system. The controller's settings incorporate
the various options ordered as standard to facilitate and minimise commissioning time.
3. On receipt of the equipment
3.1. Controls
On receipt of the equipment, check the condition of the packaging and the equipment, as well as the number of
packages. In the event of damage, enter precise reservations on the carrier's delivery note and notify your distributor
immediately.
3.2. Unpacking
When unpacking the equipment, check the following points:
■Presence of the total number of parcels
■Presence of the accessories (electrical equipment, sleeves, studs, etc.)
Remove the protective film from the outer envelope
After unpacking the equipment, the waste must be disposed of in accordance with the standards in force and waste
sorting rules must be respected.
No packaging should be released into the environment.
3.3. Storage
While the appliance is not installed, it must be stored in a dry place, as the packaging cannot be considered weather
resistant.
4. Disposal
Disposal of the unit must be carried out in an environmentally sound manner. Do not dispose of the unit with your
household waste.
1. Check with the supplier for options to return the unit.
2. If the unit cannot be returned, check local regulations for options for recycling the components.
3. Do not dispose of the batteries of the wireless controls with normal household waste. These must be disposed
of at specially designated disposal points.
5. Packaging and packing
The Zehnder Eversky ventilation units are delivered on transport racks and wrapped in a protective plastic film.
Sensitive parts are protected by cardboard or bubble wrap.
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Number Description
1Unit size 500/700/900/1100
2Type of control and thermal equipment
PREMIUM: Unit fitted with heating coil
INFINITE: Unit equipped with electric preheating coil
(de-icing) + heating coil
3Type of heating coil BE: Electric heating coil
BC: Water heating coil
4Type of fan control DIVA: Variable speed fans according to CO₂
5Power supply to the unit
6Characteristics of the heating coil
7Characteristics of the de-icing coil
8Maximum absorbed current of the unit
9Unit reference code
10 Manufacturing number to be quoted in all contacts with
the distributor
Nameplate label
6. Identification and labelling
Zehnder Eversky ventilation units are identified by a label affixed directly to a side panel.
Zehnder Eversky
ZEHNDER CALADAIR INTERNATIONAL
61 Rue Saint-Véran
71000 Mâcon
France

11
7. Composition
7.1. General composition
The Zehnder Eversky ventilation unit consists of the following main components:
Detail of the composition of the ventilation unit seen from below
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Number Abbreviation Components
1VAS Variable speed fan motor and EC motor: Fresh air supply fan
2VAR Variable speed fan motor and EC motor: Return air fan
3REC Static plate heat recovery unit with extractable condensate tray
4BIM Modulating bypass with motorised damper
5BE+THS Electric supply air heating coil + safety thermostat (PREMIUM BE - INFINITE BE)
6BC + THA Supply air water heating coil + anti-freeze thermostat (PREMIUM BC - INFINITE BC)
7DBE + THSD Fresh air preheating/de-icing coil + safety thermostat (INFINITE)
8PRC Condensate pump with drainage hose (optional)
9FS Double supply air filter F7 (additional filter option F9)
10 FR Return air filter F7
11 DEPFS Pressure switch to control the fouling of the supply filter
12 RMR Motorised isolation damper + return air servo-motor
13 RMS Motorised damper + supply air servo motor
14 DEPS Supply fan control pressure switch
15 DEPR Return fan control pressure switch
16 CO2 CO₂ sensor
17 SEG Outdoor air temperature sensor
18 SBD De-icing coil sensor (manages the preheating coil output temperature)
19 SSG Supply air temperature sensor
20 SRG Return air temperature sensor
21 SDG De-icing temperature sensor (manages the de-icing of the plate recovery unit by acting on the bypass)
22 Control board
23 IG Proximity switch
24 Extraction grille
25 Supply air grille
26 HMI Mobile wired LCD HMI controller (E3-DSP-CLD)
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7.2. Electrical board
Number Components
B1 Fan supply terminal block + condensate pump
B2 Safety connection terminal block
B3 Common terminal block GDO
B4 Common terminal block AGND (30)
B5 Common terminal block G (1) → +24 V
B6 Common terminal block +C (4)
B7 Common terminal block +C (4)
B8 Common terminal block G (1) → +24 V
B9 Common terminal block AGND (90)
INS1…3 Inserts for earth connection
K1 Electric coil heating contactor (BE)
KD Preheating/de-icing electric coil contactor (DBE)
REG Electronic controller
TRAFO Control transformer
Front view of the electrical board with the electronic controller
INS1 B1 REG B2 B3 B4
TRAFO
K1
KD B5INS2 INS3B6 B7 B8 B9
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B6 B6B6B5 B7
B4B3B2B1
7.3. Control terminals and user connections
Control board terminal blocks
Abbreviation Definition Terminals Connection
ADP Fire service remote stop 21-22
To be connected to the terminals of an NC contact of the fire
service remote stop.
(Shunt between terminals 21 -22 on release from factory)
THA Anti-freeze thermostat 24-28
To be connected to the NC contact of the anti-freeze
protection thermostat THA
(PREMIUM BC and INFINITE BC versions of units equipped
with a hot coil)
HRT Safety thermostat 24-28
To be connected to the NC contact of the safety thermostat
THS
(PREMIUM BE and INFINITE BE versions units equipped with
an electric heating coil)
MF PV Low-speed forced
operation
DI3 controller
+ 73
To be connected to an external NO dry contact (normally
open)
MF GV Low-speed forced
operation
DI4 controller
+ 74
To be connected to an external NO dry contact (normally
open)
ARR EXT External stop DI5 controller
+ 75
To be connected to an external NO dry contact (normally
open)
V3V BC 3-way valve Hot water
heating coil
AO1 controller
+ 76 + 78
To be connected to the modulating 3-way valve of the hot
water coil (see XIX CUSTOMER CONNECTIONS WIRING
DIAGRAM)
AL Alarm reporting DO5 controller
+ 47
24 V output available if the unit is faulty
(Note 24 Vac output to be relayed)
31 32 33 34
46 47 48 49
35 36 37 38 39
50 51 52 53 54
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
40 41 42
55 56 57
43 44 45
58 59 60
68 69 70
78 79 80
61 62 63 64 65
71 72 73 74 75
68 69
78 79
1234567
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8. Installation
8.1. Handling in an upright position
It is recommended that the units be handled on their transport
brackets (1) and removed at the last moment, as close as possible to
the installation site.
If the equipment is handled by a forklift truck, care should be taken
to ensure that it supports the supporting structure. Adapt the choice
of handling equipment to the weight of the equipment received (refer
to the weight given at the beginning of the document).
During transportation, the connections are fastened to the inside of
the unit to facilitate handling and prevent damage to the
connections.
Control board terminal blocks
8.2. Lifting in horizontal position
Under no circumstances should the unit be lifted using the mounting
bracket as fitted in the factory.
Particular attention should be paid when lifting it off the floor and placing
it on the floor to avoid shocks that could damage the structure and
integrity of the product.
If the unit is transported by crane, use a cross-bar and belt it to keep it in
horizontal position (air flow).
Do not obstruct the opening of the side doors to attach the unit to
the ceiling.
Support areas under the central part:
■Recessed from door joints and locks
■From the bottom edge of the front panel to the bottom edge
of the back panel.
8.3. Installation precautions
Make sure that there are no obstacles in front of the unit's supply jet.
■If the ceiling slopes, it is recommended to install the unit on the upper part of the slope.
■There must be no beams perpendicular to the unit's supply jet.
■If there are light fixtures protruding from the ceiling, the air stream must be able to pass over the light fixtures so that it
is not blocked by them.
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8.4. Core drilling of the wall or ceiling
If the fresh air inlet and/or exhaust air outlet has to pass through a wall, a sufficiently large opening must be provided
according to the recommendations in the following table:
EVERSKY A min. (mm) E (mm) E1 min. (mm) E2 min. (mm) Min. Ø (mm)
500 190 1300 190 230 300
750 225 1550 225 260 350
900 225 1550 225 260 350
1100 225 1927 225 280 350
Position of the inlet and outlet connections in front or side configurations
E1 A E
E2
Ø
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8.5. Installation and fixing on the ceiling
The Zehnder Eversky ventilation unit is designed to be installed exclusively indoors, on the ceiling (with or without a
false ceiling).
Install the fan unit in such a way that weather or ambient temperature cannot damage the internal parts of the
equipment during installation and future use. No water should be able to enter from the outside: make sure to install
awnings or rain screens at the fresh air inlet and exhaust air outlet and to leave a slight slope towards the outside at the
fresh air supply and exhaust air outlet ducts.
Also ensure that the building is kept watertight at the core holes between the wall and the ducts:
■On the outside: fill the gap between duct and drill hole
■On the inside: fill the gap between the duct and the drill-hole, or place a seal between the wall and the face of the unit
concerned.
Before any operation, check that the installation supports are suitable for supporting the weight of the ventilation unit
with all its accessories and options.
The mounting bracket must always be attached to the top panel to ensure that the unit is watertight.
Position of the inlet and outlet connections in front or side configurations
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8.5.1. Fixing the bracket to the ceiling
Example of a Zehnder Eversky unit with duct connection on the rear side and leaning against the wall.
Stage Description
1
Remove the top panel support from the unit by
unscrewing the 4 fixing screws.
Note: The position of the factory-fitted bracket
corresponds to the clamping position when the unit is
mounted on the wall.
This position may refer to the prior dimensioning of the
chosen installation configuration.
2
Check the presence of the tightening nuts on the
screws/threaded rods of the mounting bracket.
(the nuts should be engaged about 10 mm after the end
of the screws/threaded rods)
3
Draw 2 marks on the ceiling:
■1 line 120 mm from the wall to which the unit is
attached
■1 line perpendicular to the first and centred in relation
to the two drill holes in the wall.
4
Align the edge of the frame with the first line at 120 mm
and centre the frame on the second line using the
marker holes (B) (the template plates (A) can be
removed beforehand to facilitate the installation of the
frame and then reattached).
5Fix the frame using the 4x4 fixing holes (C).
6Fix the two template plates at their ends using the
fixing hole (D).
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8.5.2. Fitting the unit to the bracket
Stage Description
1Place the unit in horizontal position (doors underneath and supply air grille in front) and remove its transport
brackets.
2
Raise the control unit and bring it to its final position
approximately 80 mm from the ceiling and 80 mm from
the wall.
(At this stage, the screws (E) are still recessed from
above the unit)
3Adjust the position of the unit laterally using the two
template plates as a guide/visual marker.
4Raise the unit until it is flush with the ceiling.
5Move the unit backwards until it is resting against the
wall.
6
Open the side doors to tighten the nuts on the screws/
threaded rods inside the unit so that it is properly
seated on the ceiling and its balance is adjusted.
7Place the removable connection / solid panels from inside the unit according to the installation configuration (see
I.5 Air duct connection).
Engaging the screws/threaded rods inside
the control unit
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8.5.3. Installation of the unit on a false ceiling
The unit can be semi-recessed in a false ceiling (installation (A)) up to 10 mm above the supply grille frame.
(A) Mounting in contact with the ceiling (B) Offset ceiling mounting
The unit can also be offset from the ceiling (installation (B)).
In this case, remove the 4 screws (E) M10x70 and replace them with an M10 threaded rod. Allow the threaded rod to
protrude 70 mm below the bracket.
Ensure that the fixing of the threaded rods in the ceiling is strong enough to support :
■The weight of the unit itself and any options fitted to it
■The installation loads
■The operating/maintenance loads
8.6. Access to the inside of the unit
The Zehnder Eversky ventilation unit has 3 independent, recessed, hinged doors for access to the interior.
To close a door:
1 Push the door until it presses against the seal
towards the hinges
2 Raise the door upwards
3 Turn the bolts in the direction of the arrows
Zehnder Eversky