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CONTENTS
Installation, operating and maintenance instructions
English
ruck Ventilatoren GmbH
Max-Planck-Str. 5
D-97944 Boxberg-Windischbuch
Tel. +49 7930 9211-300
Fax +49 7930 9211-166
www.ruck.eu
e original instructions were created in the
German language.
Information updated
print 24.08.2023
Subject to change
Example configuration shown
Air handling unit with heat recovery
1. FOREWORD ............................................................................... 2
2. IMPORTANT INFORMATION .................................................................. 2
3. GENERAL SAFETY INSTRUCTIONS ............................................................. 3
4. ADHERE TO THE FOLLOWING INSTRUCTIONS ................................................... 7
5. PRODUCT INFORMATION .................................................................... 7
6. DELIVERY CONTENTS ....................................................................... 9
7. TECHNICAL DATA .......................................................................... 10
8. DIMENSIONS ............................................................................. 11
9. TRANSPORT AND STORAGE ................................................................. 12
10. ASSEMBLY ............................................................................... 13
11. ELECTRICAL CONNECTION .................................................................. 16
12. COMMISSIONING .......................................................................... 19
13. OPERATION .............................................................................. 20
14. MAINTENANCE AND CLEANING .............................................................. 32
15. MODBUS COMMUNICATION INTERFACE ....................................................... 36
16. EXPANSION AND RECONFIGURATION ......................................................... 46
17. LIFETIME AND DISPOSAL ................................................................... 46
18. TROUBLESHOOTING ....................................................................... 46
19. WIRING DIAGRAM ......................................................................... 50
Made in EU
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Installation, operating and maintenance instructions
2. IMPORTANT INFORMATION
1. FOREWORD
Dear customers,
ank you for choosing our device.
Before operating the unit, please read carefully these installation, operating and maintenance instructions. If you have
any questions, please contact: (Contact details see page 1)
e data provided in these installation, operating and maintenance instructions are for the product description only. A
statement about a certain condition or a suitability for a certain application cannot be derived from our information.
e information does not release the user from his own assessments and examinations.
All rights reserved by the manufacturer, even in the event of industrial property rights.
Any disposal such as copying and distribution rights lies with us.
is manual contains important information on the safe and appropriate assembly, transport, commissioning, operation,
maintenance, disassembly and simple troubleshooting of the product.
e product has been manufactured according to the accepted rules of current technology.
ere is, however, still a danger of personal injury or damage to equipment if the following general safety instructions and
the warnings before the steps contained in these instructions are not complied with.
■Read these instructions completely and thoroughly before working with the product.
■Keep these instructions in a location where they are accessible to all users at all times.
■Always include the operating instructions when you pass the product on to third parties.
2.1. Applicable Documents
e following documents and information on the device must be observed in addition to the installation, operating
and maintenance instructions:
Other applicable standards:
■DIN VDE 0100-100
■DIN EN 60204-1
■DIN EN ISO 13857
■DIN EN ISO 12100
■VDMA 24186-1
Available documents at www.ruck.eu
■Installation, operating and maintenance instructions
■EC Declarations of conformity
■EC-Declaration of Incorporation (Directive 2006/42/
EC)
■Commissioning report
■Call to Tender
■Dimensioned drawing
■Technical drawing DWG
■Technical drawing DXF
■3D STEP
Nameplate
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EN
2.3. Warranty and liability
Our devices are manufactured to the highest technical level in accordance with the generally accepted rules of techno-
logy. ey are subject to constant quality controls. Because the products are being constantly developed, we reserve
the right to make changes to the products at any time and without prior announcement. We assume no liability for the
correctness or completeness of these installation, operating and maintenance instructions.
To ensure your warranty claims, it is imperative to provide a commissioning report and a maintenance record.
Warranty and liability claims for personal injury and property damage are excluded if they are due to one or more of
the following causes:
■Improper use
■Improper mounting, commissioning, operation and maintenance
■Operating the device with defective and / or non-functional safety and protective devices
■Failure to observe the instructions regarding transportation, installation, operation and maintenance
■Unauthorized structural changes to the device
■Poor monitoring and replacement of maintenance parts
■Improperly performed repairs
■Disasters and force majeure
3. GENERAL SAFETY INSTRUCTIONS
Planners, plant engineers and operators are responsible for ensuring that the product is installed and operated correc-
tly.
■Use our devices only in perfect technical condition.
■Check the device for obvious defects, such as cracks in the housing or missing rivets, screws, caps or other applica-
tion-relevant defects.
■Only use the device in the power range specified in the technical data and on the nameplate.
■Protection against contact and being sucked in and safety distances should be provided in accordance with DIN EN
13857.
■Generally prescribed electrical and mechanical protection devices are to be provided by the client.
■e locking latch can and must only be locked or unlocked with an Allen key SW8. e latches must always be
locked after closing the lids..
■Safety components must not be bypassed or put out of operation.
■e product may be operated by personnel with limited physical, sensory or mental capacities only if they are su-
pervised or have been instructed by responsible personnel.
■Children must be kept away from the product.
2.2. Provisions and regulations
When properly installed and operated, the device complies with the applicable standards and EU Directive at the
time of its placing on the market.
In addition, observe generally valid, legal and other binding regulations of the European or national legislation as well
as the regulations in your country for accident prevention and environmental protection.
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Installation, operating and maintenance instructions
3.2. Improper use
Any use of the product other than described in chapter “Intended use” is considered as improper.
e following points are improper and dangerous:
■Delivery of explosive and flammable media or operation in potentially explosive atmospheres.
■e conveyance of greasy and moist media (over 90% relative humidity).
■Delivery of aggressive and abrasive media.
■e installation in wet rooms.
■Operation without the duct system.
■Operation with closed air connections.
■e use on vehicles, aircrafts and ships.
3.3. Personnel qualifications
Assembly, commissioning, operation, disassembly and service (including maintenance and repair) require basic mecha-
nical and electrical knowledge, as well as knowledge of the appropriate technical terms. In order to ensure operating
safety, these activities may therefore only be carried out by qualified technical personnel or a person under the direc-
tion and supervision of qualified personnel. Qualified personnel are those who can recognize possible hazards and
institute the appropriate safety measures due to their professional training, knowledge, and experience, as well as
their understanding of the relevant conditions pertaining to the work to be done. Qualified personnel must observe the
rules relevant to the subject area.
In this manual, there are safety instructions before the steps whenever there is a danger of personal injury or damage
to the equipment. e measures described to avoid these hazards must be observed.
Safety instructions are set out as follows:
Safety sign (warning triangle) - Draws attention to the risk.
• Type of risk! - Identifies the type or source of the hazard.
»Consequences - Describes what occurs when the safety instructions are not complied with.
→ Precautions - States how the hazard can be avoided.
3.4. Safety instructions in this manual
3.1. Intended use
Our devices are incomplete machineries as defined in the EU Machinery Directive 2006/42/EC (partly completed ma-
chinery). e product is a not ready-for-use machine in terms of the machine directive.
It is intended exclusively for installation in a machine or in ventilation equipment and installations or for combination
with other components to form a machinery or installation. e product may be commissioned only if it is integrated
in the machinery/system for which it is designed and the machinery/system fully complies with the EC machinery di-
rective.
Observe the operating conditions and performance limits specified in the technical data.
Conveying and ambient temperatures must be observed according to the technical data and the nameplate.
e units are designed for use in comfort ventilation applications.
e units must not be used for ventilation of buildings where humidity is continuously high such as swimming pools,
saunas, spas.
Intended use also implies that you have fully read and understood this manual.
Improper use may result in danger to the life and limb of the user or third parties or damage to the system
or other property.
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General warning!
Indicates possible hazardous situations. Failure to observe the warnings may result in perso-
nal injury and / or damage to property.
Electricity warning (hazardous voltage)!
Indicates possible hazards due to electricity. Failure to observe the warnings may result in
death, injury and/or damage to property.
Hot surface warning!
Indicates possible hazards due to high surface temperatures. Failure to observe the warnings
may result in personal injury and/or damage to property.
Finger-Crushing Warning!
Indicates possible hazards due to moving and rotating parts. Failure to observe the warnings
may result in personal injury.
Overhead load warning!
Indicates possible hazards due to overhead loads. Failure to observe the warnings may result
in death, injury and/or damage to property.
Follow important information!
Instructions for safe, optimum use of the product.
Safety sign (warning
triangle)
Consequence
• Electricity warning (hazardous voltage)!
»Failure to observe the hazard may result in death,
injury or damage to property.
→ Before performing any work on conductive parts, al-
ways disconnect the unit completely from the electri-
city supply and make sure that it cannot be switched
back on again.
• Never reach into the impeller or other rotating or
moving parts.
»Failure to observe the hazard may lead to serious
injury.
→ Work may only be performed once the impeller has
come to a complete halt.
• Never clean the internal space with flowing water
or a high-pressure cleaner. Do not use aggressive or
easily flammable products for cleaning (impellers/
housing).
→
Only use mild soapsuds. e impeller should be cleaned
with a cloth or brush.
• General warning
»Failure to observe the warnings may result in personal
injury and / or damage to property.
→ Unauthorized repairs may cause personal injury and /
or damage to property, in which case the manufactu-
rer‘s guarantee or warranty will not apply.
• Caution! Burning hazard.
»Failure to observe the hazard may result in personal
injury and/or damage to property.
→ Do not touch the surface until the motor and heater
have cooled.
• Never reach into the impeller or other rotating or
moving parts.
»Failure to observe the hazard may lead to serious
injury.
→ Work may only be performed once the impeller has
come to a complete halt.
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Installation, operating and maintenance instructions
Air filter (Panel Filter) Filter
class ISO ePM1 (F7)
Air filter (Panel Filter) Filter
class ISO ePM10 (M5)
Heat exchanger (thermal
mass heat exchanger)
Damper system
Read the operating manual
before commissioning the
product.
3.5. Safety labels on the product
Fig. 3-1
Safety labels
Version right
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EN
4. ADHERE TO THE FOLLOWING INSTRUCTIONS
4.1. General instructions
■Persons who assemble, operate, disassemble or maintain our devices must not be under the influence of alcohol,
drugs or pharmaceuticals that may affect perception and responsiveness.
■Responsibilities for the operation, maintenance and regulation of the product should be clearly determined and
observed so that there can be no unclear areas of responsibility with regard to safety.
4.2. Indications assembly
■Disconnect all of the product‘s poles from the mains before installing the product or connecting or removing plugs.
Make sure that the product cannot be switched back on again.
■Lay cables and lines so that they cannot be damaged and no one can trip over them.
■Information signs must not be changed or removed.
4.3. Indications Commissioning
■Make sure that all electrical connections are either used or covered. Commission the product only if it is installed
completely.
■e power switch must always be fully functional and easy accessible!
■Only authorized personnel is allowed to operate the setting mechanisms of the components or parts, under the
provision that the system is used as intended.
■In an emergency, or if there is a fault, or other irregularities, switch the equipment off and make sure it cannot be
switched back on again.
■e technical data given on the rating plate must not be exceeded.
4.4. Indications during operation
5. PRODUCT INFORMATION
Description:
e unit is a ventilation unit with integrated storage mass heat exchanger for optimum heat recovery. Large-area panel
filters ISO ePM1/ ePM10 and control electronics are integrated in the unit. e device has a remote control for con-
trolling and setting the operating parameters. e high quality housing consists of a frameless sheet metal structure
with smooth internal and external walls. e housing is insulated with 30 mm mineral wool. e unit can be operated
at a constant volume. e control system, in conjunction with external sensors, enables demand-based ventilation.
■Frameless casing manufactured from galvanized steel sheet.
■Removable heat exchanger.
■Extractable large panel filters ISO ePM10 (M5) / ISO ePM1 (F7)
■Controller installed, wired, ready to plug in.
■Main / Isolator switch
■External control unit with control cable.
■Protection class: With proper duct and cable connection and correct installation position (see under „Permitted
installation position“), IP41
■Integrated damper system
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Installation, operating and maintenance instructions
1. Housing
2. Maintenance cover
3. Isolator switch
4. Cover with condensate tray
5. EC-fan
6. Cable glands
7. Rating plate
8. Connection exhaust air Version right
9. Connection intake air Version right
10. Remote control
11. Remote control cable
12. Temperature sensor exhaust air Version right
13. Controller board
14. Safety labels
15. Switchboard cover
16. Damper system
17. Temperature sensor fresh air Version right
18. Air filter ISO ePM1 (F7) - supply air
19. ermal mass heat exchanger
20. Air filter ISO ePM10 (M5) - extract air
21. Connection extract air Version right
22. Connection supply air Version right
23. Extracted air temperature sensor Version right
24. Supply air temperature sensor Version right
5.1. Device description
Fig. 5-1
Fig. 5-2
Version left:
8. Connection supply air
9. Connection extract air
12. Supply air temperature sensor
17. Extracted air temperature sensor
18. Air filter ISO ePM10 (M5) - extract air
20. Air filter ISO ePM1 (F7) - supply air
21. Connection intake air
22. Connection exhaust air
23. Temperature sensor fresh air
24. Temperature sensor exhaust air
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EN
5.2. Nameplate
ATTENTION! e information on the nameplate must always be observed!
Legend:
■Imax Max. current consumption
■tA / tMMax. ambient temperature / Max. medium temperature
■P1N Rated power consumption
■nNRated speed
■ErP Data ErP Conformity, if required according to Reg. 327/2011
■η Overall efficiency
■N Efficiency at the optimum energy efficiency
■ID Item number
■SN Serial number
Protection class
Product name
Test date
CE marking
UKCA marking
6. DELIVERY CONTENTS
■1 x Ventilation unit with heat recovery
– 2 x EC Fan
– 1 x panel filter ISO ePM10 (M5)
– 1 x panel filter ISO ePM1 (F7)
– 2 x thermal mass heat exchangers
– 1 x switching flap supply air
– 1 x switching flap extract air
■1 x remote control with control cable 10m
■1 x Installation, operating and maintenance instructions
■EC Declarations of conformity
■EC-Declaration of Incorporation (Directive 2006/42/EC)
EAC marking
Insulation class motor
ErP 2015
Fig. 5-3 Nameplate
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ACCU K 1200 F OOJL
07.09.2022
ID 145 765
230V ~
Imax.
tA/tM
P1N
nN
50Hz
4,2A
40/40°C
605W
3010 1/min
IP41
ISO F
VSD integrated
N= 72,4
η=56,3% (A,static)
ErP 2015
SN
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ACCU K 600 F OOJR
ACCU K 600 F OOJL
ACCU K 1200 F OOJR
ACCU K 1200 F OOJL
ACCU K 2400 F OOJR
ACCU K 2400 F OOJL
142491 143043 145767 145765 147192 148621
230V ~ 230V ~ 230V ~ 230V ~ 400V 3~N 400V 3~N
50 50 50 50 50 50
380 380 605 605 1950 1950
2,9 2,9 4,2 4,2 4,0 4,0
1x16A 1x16A 1x16A 1x16A 3x16A 3x16A
40 40 40 40 40 40
760 760 1460 1460 3050 3050
4300 4300 3010 3010 3390 3390
1030 1030 840 840 1320 1320
82 82 81 81 93 93
58 58 63 63 66 66
57 57 63 63 66 66
82 82 82 82 88 88
57 57 59 59 63 63
198,0 198,0 363,0 363,0 420,0 420,0
143169 143169 146098 146098 146099 146099
XXX
XXX
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Installation, operating and maintenance instructions
7. TECHNICAL DATA
Product name
Item number
Voltage UNV
Frequency fNHz
Rated power consumption PNW
Max. motor current Imax A
Fuse device
Max. medium temperature tM°C
Max. air volume m³/h
RPM 1/min
Max. primary static pressure Pa
Sound power level supply air LWA 6 dB(A)
Sound power level extract air LWA 5 dB(A)
Sound power level outdoor air LWA 5 dB(A)
Sound power level exhaust air LWA 6 dB(A)
Sound power level casing LWA 2 dB(A)
Weight kg
Wiring diagrams No.
Version right
Version left
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A B C D E F
mm mm mm mm mm mm mm
C
F
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D
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ACCU K 600 F OOJR 142491 200 x 400 960 1800 365 1004,6 1529 4 x Ø15
ACCU K 600 F OOJL 143043 200 x 400 960 1800 365 1004,6 1529 4 x Ø15
ACCU K 1200 F OOJR 145767 200 x 300 1460 2200 485 1560 1929 8 x Ø15
ACCU K 1200 F OOJL 145765 200 x 300 1460 2200 485 1560 1929 8 x Ø15
ACCU K 2400 F OOJR 147192 200 x 300 1890 2200 485 1990 1929 8 x Ø15
ACCU K 2400 F OOJL 148621 200 x 300 1890 2200 485 1990 1929 8 x Ø15
EN
8. DIMENSIONS
Product name Item number Duct connection
Fig. 8-1
Dimensions of the supply air unit
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163735
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L
B
LxBxH mm 122 x 89 x 23
Ø A mm 60
Ø D mm 27,9
Ø D
Ø A
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Installation, operating and maintenance instructions
Size
Fig. 8-2
Outside dimensions of the control unit.
Fig. 8-3
Installation dimensions of the control unit.
8.1. Dimensions Control unit
Assembly size
Transport and storage should only be performed by specialist personnel in accordance with the assembly and opera-
ting manual and regulations in force.
e following points should be noted and followed:
■Check the delivery according to the delivery note to ensure it is complete and correct and check for any damage.
Any missing quantities or damage incurred during transport should be confirmed by the carrier. No liability is accep-
ted if this is not observed.
■For weight see technical data
■It should be transported with suitable lifting equipment in the original packaging or on the transport equipment
indicated.
■If transported with a forklift, it should be ensured that the product is resting with the basic profile or base frame
completely on the forks or on a pallet and the product‘s centre of gravity is between the forks.
■e driver must be authorized to drive a forklift.
■Do not go beneath the suspended load.
■Never lift and transport the unit by the door handles, covers or other mounting parts!
■Avoid damage or deformation of the housing.
■e product must be stored in a dry area and protected from the weather in the original packaging. Open pallets
should be covered with tarpaulins. Even weatherproof modules should be covered because their weather resistan-
ce is only guaranteed after complete installation. If moisture has penetrated into the original packaging, remove it
immediately.
■Storage temperature between +5 °C and +40 °C. Avoid severe temperature fluctuations.
■If the product has been in storage for more than a year, check the smooth running of impellers and valves by hand.
9. TRANSPORT AND STORAGE
Fig. 9-1
Unit transported on a pallet with a forklift.
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163736
ACCU K 600 F 4 200
ACCU K 1200 F 8 363
ACCU K 2400 F 8 430
EN
10. ASSEMBLY
Assembly work may only be performed by specialist personnel in accordance with the installation and operating ma-
nual and the regulations and standards in force.
e following points should be noted and followed:
■Mount and align the unit with the aid of a water level. Only if the machine is horizontally installed can proper con-
densate drainage be guaranteed.
■Only suitable installation aids, in accordance with regulations, should be used.
■e device must be installed in such a way that it is easily accessible for maintenance and cleaning purposes.
■e unit should only be installed with authorized and suitable fastening materials at all fastening points.
■Do not distort the unit when installing.
■e unit should be suitably secured.
■Just use the indicated mounting and fixing places. No holes should be made in the housing or any screws screwed
into it.
■e duct system must not be supported on the housing.
■It is recommended that the duct system is attached with flexible connections or connection collars in order to
isolate any structure-borne noise. For floor or wall mounting, all units should be mounted to isolate structure-borne
noise.
■Make sure that the intake duct has direct access to the intake air. Warning: branches in the intake duct, to other
fan units for example, may, if the dimensions are too small, lead to low pressure in the duct and therefore malfunc-
tion of the unit.
■e pressure loss in the duct system must not exceed the capacity of the unit! e pressure loss in the duct should
not be more than 2/3 the unit‘s maximum pressure so that an adequate air output can still be achieved. is will
prevent malfunction. Pressure losses in the duct system are adversely affected by: the length of the duct system,
small duct cross-section, elbows, additional filters, valves, etc.
10.1.1. Unit suspension
Install insulated against struc-
ture-borne sound
Product name
Anzahl
Befestigungen
Weight
Devices
kg
Fig. 10-1
Unit suspension
10.1. Unit suspension / Permitted installation positions
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Installation, operating and maintenance instructions
10.1.2. Permitted installation positions
Ceiling mounting
Floor installation
Wall installation
Floor
Install insulated against structure-borne
sound
Fig. 10-2
Ceiling mounting
Ensure a distance of min. 1,5 cm to the
ceiling.
Ceiling
Avoid condensate ingress (see
10.3.)
Fig. 10-3
Floor installation
Fig. 10-4
Wall installation I
Fig. 10-5
Wall installation II
Install insulated against structure-borne
sound
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10.2. Mindestabstand für Wartungsarbeiten
Product name
Remove door min.
Remove filter min.
electrical connection min.
electrical connection recommended
Connection cable min.
Open door min.
10.3. Duct connections
Duct connections should be made such way that no condensate can get into the unit via the ducts.
■Insulate cold ducts in warm rooms
■Insulate warm ducts in cold rooms
■Ground heat exchangers should be equipped with a controlled condensate drain positioned before the unit
e air connections must be matched to the duct connections. (see under „Technical data“)
10.4. Operating limits
Operation limits of the device
Fresh air temperature -20 °C to +40 °C
Installation place: min. +5°C
Extract air class EN 13779 ETA 1 / ETA 2
Absolute humidity extract air max. 12g/kg
For the ventilation of rooms where the emission sources are human metabolism or building materials and structures,
e.g. offices, spaces for public service, meeting rooms as well as in rooms where smoking is allowed.
e suitability for enclosure condensation has to be checked by the customer, it is possible that suitable measures
like ventilation of the installation area, or an additional insulation of the outdoor air intake area, are going to be
necessary.
Ventilation unit not suitable for outdoor installation.
Fig. 10-6
Minimum distance for maintenance works
Fig. 10-7
Connection air duct
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Installation, operating and maintenance instructions
e electrical installation may only be carried out by qualified electricians in compliance with the installation, operating
and maintenance instructions and the applicable national regulations, standards and guidelines:
■ISO, DIN, EN and VDE specifications, including all safety requirements.
■Technical connection conditions.
■Safety at work and accident prevention requirements.
is list does not claim to be complete.
Requirements should be applied under one‘s own personal responsibility.
■e electrical connections must be made as shown in the corresponding wiring diagrams and terminal diagrams.
■e type of cable, size of cable and method of laying should be determined by an authorized electrician.
■Low and extra-low voltage cables should be laid separately.
■If no repair switch is integrated in the device, an all-pole mains disconnecting switch with min. 3 mm contact
opening must be provided in the supply line.
■Use a separate cable inlet for each cable.
■Any cable inlets that are not used must be sealed so that it is airtight.
■All cable inlets must have strain relief.
■Create equipotential bonding between the unit and the duct system.
■Check all protective measures after the electrical connection work (earthing resistance, etc.)
■Motor current and motor power must not exceed the values stated on the motor nameplate. e specified max.
fan speed must never be exceeded, otherwise the motor and fan will be destroyed by this overload and dissolved
or flying parts can destroy other components.
11. ELECTRICAL CONNECTION
• Electricity warning (hazardous voltage)!
»Failure to observe the hazard may result in death, injury or damage to property.
→ Before performing any work on conductive parts, always disconnect the unit completely from the electri-
city supply and make sure that it cannot be switched back on again.
Connection compartment / Connections on the unit
e connection compartment is inside the unit. Sie müssen zuerst die Abdeckung des Klemmkastens entfernen. Jede
anzuschließende Leitung muss durch eine separate Kabeleinführung geführt werden.
For this, use the supplied cable glands, fittings and cover plate. Cables that carry mains voltage must be fastened with
the tension relief devices available.
(1) Controller board
(2) Switchboard cover
(3) Cable gland power supply
(4) Cable gland free
(5) Cable gland control unit
Fig. 11-1
Connection compart-
ment
Fig. 11-2
Connection compartment
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EN
11.1. Overcurrent protection
■e unit may only be operated with the correct overcurrent protection.
■is must be established by a qualified electrician.
■e recommended fuse can be found in the technical data.
11.2. Description external inputs and outputs
11.2.1. Inputs
Unit enabling
e unit can be switched on and off with an external potential-free contact (see wiring diagram). An external voltage
must never be applied to this connection. e control system would be destroyed. Any devices providing a potenti-
al-free contact (e.g. central building control system) can be used to control the unit. is contact must be securely
isolated from external voltages because otherwise dangerous conditions might occur in the event of a fault.
e extra-low voltage control cables must be laid separately from the mains cables.
Motion detector
A motion detector can be connected to the controller. When the contact is closed, the unit goes into „Party“ mode for
the overrun time set in the „Functions“ menu. External, potential-free contact.
Fire detector
An external, potential-free fire detection contact switches the device off. e control unit display shows „Fire protecti-
on fault“. is signals requires a manual reset.
Frost protection via supply air sensor
If the supply air temperature drops below 4°C, the unit goes into the preheating mode. e dampers are closed, the
fans are switched off, the circulation pump is switched on and the heating valve is opened. If the supply air tempera-
ture is still below 4°C after 20 minutes, the system switches off completely and the fault message F7 Frost protection
appears on the control panel. e circulation pump remains switched on and the heating valve opened. If the supply air
temperature rises again within 20 minutes, the device returns to normal operation.
Optional frost protection thermostat
An external frost protection thermostat can be connected to the controls. As soon as the temperature drops below the
set value, the dampers are closed, the fans are switched off, the circulation pump is switched on and the heating valve
is opened. If the set value is not reached after 20 minutes, the system switches off completely and the fault message
F7 Frost protection appears on the control panel. e circulation pump remains switched on and the heating valve ope-
ned. If the supply air temperature rises again within 20 minutes, the device returns to normal operation.
External 0 - 10V input
An external measuring transducer can be connected to the 0 - 10V input for demand controlled ventilation.
Unit supply cable
Connect the mains supply cable as shown in the wiring diagram. For the dimensioning of the line, observe the unit‘s
rating plate and the relevant guidelines. Appropriate protection with correctly dimensioned automatic safety breakers
(circuit protection breaker) must be provided.
e device must be connected according to the wiring diagram. For fans which are controlled by external control de-
vices, the corresponding operating instructions of the manufacturer must be observed.
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ACCU K 1200 ACCU K 1200
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Installation, operating and maintenance instructions
11.2.2. Outputs
External pressure sensor
Two pressure sensors can be connected to the control unit for the operation with constant pressure control. One sen-
sor for extract air pressure, one sensor for supply air pressure.
Control outputs for heating and cooling
e following configurations for controlling the outputs for heating and cooling are possible.
only int. E-heat Only internal E-heating
H: 230 V
Heating 3-way mixing valve 230V output (X6:N,8,9)
K: 230 V
Cooling 3-way mixing valve 230V output (X3:N,2,3
H & K: 230 V Heating 3-way mixing valve 230V output (X6:N,8,9)
Cooling 3-way mixing valve 230V output (X3:N,2,3)
H: 0-10 V & 230 V Heating 3-way mixing valve 230V output (X6:N,8,9)
Heating 3-way mixing valve 0-10V output (X15:5,9)
K: 0-10 V & 230 V Cooling 3-way mixing valve 230V output (X3:N,2,3)
Cooling 3-way mixing valve 0-10V output (X15:5,9)
H: 0-10 V K: 0-10 V
Heating 3-way mixing valve 0-10V output (X15:4,8)
Cooling 3-way mixing valve 0-10V output (X15:5,9)
H & K: 0-10 V
Heating and cooling 0-10V output (X15:5,9)
Enable cooling device open = heating
Enable cooling device closed = cooling
Heating & Cooling
Frost protection
Control
Pre-purge time
P-share
I-share
Frost protect.temp.
SupplyAir temp.
Heating
Heating Save
Control
Enable circulation pump heating
A circulation pump can be connected to the controller (see circuit diagram). If heating is required, the heating valve is
opened by the controller and the circulation pump output is activated. Any pump connected must be inherently safe
and block-proof.
Electrical connection with Vmax =230 VAC and Imax=2 A.
Enable circulating pump cooling
A circulation pump can be connected to the controller (see circuit diagram). When cooling is required, the control sys-
tem opens the cooling valve and activates the „Circulation pump“ output. Any pump connected must be inherently safe
and block-proof.
Electrical connection with Vmax =230 VAC and Imax=2 A.
19
EN
12. COMMISSIONING
Commissioning by trained technical personnel may only be performed after any risk has been ruled out. e
following checks should be performed in accordance with the installation and operating manual and the regu-
lations in force:
■Correctly sealed installation of the unit and duct system.
■Check the duct system, unit and medium lines, if present, remove any foreign bodies if necessary.
■e intake opening and inflow into the unit must be clear.
■Check all mechanical and electrical protection measures (e.g. earthing).
■Voltage, frequency and type of current must correspond with the rating plate.
■Check all electrical connections and wiring.
■Check any electrical, switching, safety and control devices connected.
■e unit may not be switched on when the housing is open.
■Measure electricity consumption at operating speed and compare with the rated current.
■Check the fan for excessive vibrations and noise generation.
11.2.3. Interfaces
Control unit
e control unit is connected to the supply air unit‘s control system with a control cable. Max. cable length 100 m.
A connector on the control cable is plugged directly into the socket on the control unit from beneath (see Fig. 13-1 ).
On the unit, the control cable is first fed through a cable gland (see Fig. 11-1), placed in the cable duct and then connec-
ted to the RJ10 socket provided in the controller board. e control cable must not be shortened. Any excess length
must be stowed outside of the housing. If the cable is too short, extensions can be ordered from the manufacturer
or supplier. Alternatively, a 4-wire data cable with 120 Ohm resistance can also be connected. is is fed through the
back wall of the control unit and connected to the spring-loaded terminals. In the unit, instead of being connected to
the controller board in the RJ10 socket, the cable is connected in the spring-loaded terminals next to it (see wiring
diagram).
Modbus RTU
e communication interface with Modbus RTU protocol is already integrated as standard. e central building control
system can be connected directly to the integrated interface via Modbus.
3-way valve heating
Temperature control for the optional warm water heating coil, e.g. active heating to cover the heating demand by the
ventilation system. Control output 3-position. Control output 230V.
3-way valve cooling
Temperature control for the optional cold water cooling coil, e.g. active outdoor air cooling by the ventilation system.
Control output 3-position. Control output 230V.
Unit malfunction
If there is a unit malfunction, an error message appears on the display and at the same time switches a relay. A closing
and opening signal is available (see wiring diagram). Electrical connection of the changeover contact with U - 230 VAC
and Imax = 2A. (ere is not any double insulation on the mains cables).
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ACCU K 1200
ACCU K 1200 ACCU K 1200
EN
Installation, operating and maintenance instructions
13. OPERATION
13.1. Control unit
e control unit allows the selection and the command of various unit functions. e control unit has an integrated
temperature sensor (set-point sensor) for measuring the room temperature. e display shows the various operating
parameters and error messages. You can switch between displaying different menu points and make changes to your
unit settings and values.
13.1.1. Mode selection
Fig. 13-1
Control unit
Flow rates, temperatures, setpoints don´t need to be set separately.
Preconfigured modes (Eco, Standard, Party) with flow rates, temperatures, sensor setpoints.
In User 2 can only be selected the different modes, changes can only be made in User 3
Setpoint temp.
Mode Standard
Mode
SupplyAir temp.
Room temp.
SupplyAir
ExtractAir
Air humidity
Eco
Night
Standard
Comfort
Party
Standby
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