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ZHK NANO
INSTRUCTION MANUAL
V09-18.1
Instruction and Operation Manual ZHK NANO
In addition to the instructions in this guide, subject-specific standards, as well as local, national and international regulations must be observed.
!
Please give this instruction manual after completion of the work to the operating staff of the AHU. Please keep the complete instruction and operating manual at your documents.
!
Betriebsanleitung
!
Instruction manual
!
Manuale d’istruzione
!
ET 174-0
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Instruction and Operation Manual ZHK NANO
Table of contents
CE-conformity / incorporation declaration according to Machinery Directive 2006/42/EC .. 8
airside connection to AHU ................................................................ 38
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Airflow measurement by differential pressure measurement at the fan ............................ 46
10 Information on airborne noise emitted by the air conditioning units - on request .......... 55
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translation from original instruction manual -
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1 Introduction
Instruction and Operation Manual ZHK NANO
1.1 Model code
ZHK INOVA S 15/6
–
15/6
AHU type (standard)
AHU execution
Unit size supply air
Unit size exhaust air
Legend used for AHU type
ZHK 2000
ZHK INOVA
ZHK NANO
ETA XXX
ETA XXX COOL
ETA MATIC
ETA POOL SPA
ETA POOL OLYMPIC
ETA PT
ETA ACCU
ETA ROT
ETA WP
ETA PAC
CLEANLINE
Design key AHU execution
S
DG
I
HG
Legend for the unit size standard housing type thermal bridge reduced housing type standard product with plate heat exchanger key ETA: including control including refrigeration circuit standard compact AHU for pool dehumidification with refrigeration circuit (option) for pool dehumidification including plate heat exchanger and refrigeration circuit heat recovery by plate heat exchanger heat recovery by accumulator heat recovery by heat wheel refrigeration circuit, heat pump function indirect adiabatic cooling for hygienic use, including control
AHU for indoor installation
AHU for outdoor installation
AHU Industrial
–
heavy version of the panels
AHU hygienic execution
Example 15/6: the first index (15) corresponds to the clear width, the second index (6) to the clear height. According to the following table, the dimensions in mm are 15/6 = 1525 x 610 mm (clear width x clear height)
Index
Dimension (mm)
Index
Dimension (mm)
3
305
27
2745
4
457,5
30
3050
6
610
33
3355
9
915
36
3660
12 15
1220 1525
39
3965
18
1830
42 45
4270 4575
21
2135
48
4880
24
2440
This information applies both to the ratios of the supply air and the exhaust air.
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1.2 Intended use / foreseeable misuse
1.2.1 Intended use
An AHU is used, depending on the chosen model, to create a desired indoor air quality. Parameters are
…
air change
air temperature and humidity
to filter normal contaminated air
in special cases for filtering air for clean room applications
The units are suitable for…
an ambient air temperature range of
–
20 °C to + 70 °C and for the supplied air from
–
20 °C to
+ 40 °C
handling of normal air
for the operation within the agreed technical data
Operation at other conditions must be agreed in writing.
If products and components of other manufacturers are used, those must be recommended or approved by EUROCLIMA.
On-site changes are in full safety responsibility of the operator.
1.2.2 Foreseeable misuse
Other than above use, is considered as improper and must be excluded totally:
-
The commissioning of equipment, prior performing the steps indicated in the assembly instructions and operating with an open fan unit door is a serious security risk.
-
Opening the unit, without securing the repair switch in the off position, represents a massive security risk.
-
The operation of an AHU equipped with electric heater while fan-motor is cut off, or if fan is working at a limited airflow for example caused by closed dampers or similar, but with electric heater in operation produces an imminent fire risk.
-
The operation in an explosive atmosphere is prohibited.
-
Handling of air with corrosive / aggressive components.
-
Pressure-sided doors can detach suddenly while opening. So there is a risk of injury for the
1.3 Modular design
Because of the modular AHU design, the manual covers all the possible sections and components which can be delivered. The ordered range is smaller and can be seen on the technical data sheet
- see
.
In this manual treated parts / components that are not part of the delivered AHU, can therefore be disregarded.
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1.4 Documentation
The AHU will be delivered with the following documentation:
Instruction and operation manual ZHK NANO Cardboard box / nylon bag in the fan section
Depending on AHU type and execution, the following documentation is included:
Components operation manual
AHU drawing cardboard box / nylon bag in the fan section applied on each delivery section and
Wiring diagram glued on the inside of the fan section door
In control cabinet
Depending on type of accessories, the following documentation is included:
K-value for airflow measurement glued on the inside of the fan section door
The above mentioned documentation must always be available when working on the AHU!
You will also find stickers with warning labels and other instructions on and inside the AHU.
In this manual and on labels used symbols:
Indicate safety instructions
–
or yellow triangle with the corresponding threat pictogram
Indication to avoid damage
In addition to the contents of this manual, the instruction manuals of the component manufacturers must be followed. These will be delivered separately or can be downloaded from the homepage of the component manufacturer. In case of contradiction between this manual and instruction manuals of the component manufacturer for safety instructions, the most restrictive interpretation is valid. At differences between this manual and the instruction manual of the component manufacturer, the instruction manual of the component manufacturer has to be applied. In case of doubt, please contact your EUROCLIMA office.
2 Safety instructions / Guidelines to conformity to laws and directives
2.1 CE-conformity / installation instructions for safe operation
2.1.1 CE-conformity / incorporation declaration according to Machinery Directive
2006/42/EC
An AHU (or any part thereof) supplied by EUROCLIMA is by definition of Machinery Directive
2006/42/EC an incomplete machine, because it is limited in function and is only a part of the building system. Accordingly, for a safe operation before the initial start-up, the general in
(Installation instructions for the proper installation in the building system)
and in particular in the following chapters described on-site work must be carried out for a safe operation.
Depending on the scope of supply a CE-conformity declaration or a declaration of incorporation will be issued. A declaration of incorporation will be issued, if supplementary work on site is necessary
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2.1.2 Installation instructions for the proper installation in the building system
For the proper installation of AHU equipment and the safe operation of the system, depending on the configuration of the AHU, before the first start at least the following points must be implemented or upgraded on responsibility of the client:
Assembly of delivery sections
The deliver sections of the AHU must be assembled and linked together, according to the drawing supplied on the inner face of fan section door. See the
chapter 4 (Foundation / erection)
and
.
Secure inlet and outlet openings
All the inlet and outlet openings must be connected to ducts or respectively equipped with grilles, to prevent effectively access from the outside to moving parts (such as fan wheels) during operation.
Repair switch
See
Installation of filters
See
.
Temperature limitation
By a control system must be ensured, that the AHU is only operated with a supply air temperature below the allowable maximum (40 °C, when not stated otherwise in the technical data). For this purpose, the continuous monitoring of the supply air must be ensured on site.
Measures regarding noise attenuation
As basis for on-site sound measures calculation (such as for sound attenuators) the on request available sound data can be used. Information regarding the emitted sound power level over the openings see the technical data sheet, which is available on request
–
refer to
Information on airborne noise emitted by the air conditioning units - on request)
.
Measures to minimize the risk of water damage or damage caused by similar media
See
chapter 4.2.2 (Actions to prevent potential risks).
Connection to an external protective conductor system
See
chapter 7.1 (Connecting to an external protective conductor system)
.
Electric heater
Installation (if not supplied by EUROCLIMA) and connection of thermostats for safety shutdown, see
chapter 7.4 (Electric heaters)
.
Frost protection for plate heat exchangers
See chapter 7.5 (Frost protection for plate heat exchanger).
Siphons
Connecting according to
chapter 6.2 (Drain for condensate and excess water)
.
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Flexible connection
Installations (if not supplied by EUROCLIMA) refer to
.
Heat exchanger
For all heat exchangers which are connected on-site, irrespective of the medium used (water, water-glycol mixture...), it must be ensured by the customer that the resulting assembly meets the pressure equipment directive, PED '2014/68 / EU.
Field equipment for roof units
On site mounted field devices for roof units, e.g. damper position motors or pressure switches must be weather-protected in case of insufficient IP class and - depending on the installation situation - possibly also protected against icing.
Frost protection for heat exchangers
Venting, draining of heat exchangers
See chapter 8.1.2 ( Heat exchanger ).
2.2 Indications for minimizing specific hazards
2.2.1 General indications
An improperly performed maintenance can pose a security risk!
Risk of thin sheets, when working on AHU
During work on AHU (or on parts), there is a substantial risk of cutting with thin sheets as e.g. roof sheets, fins of heat exchangers, corners and edges - Use personal protective equipment: wear protective helmet, gloves, safety shoes and long protective clothing.
Lighting
For work on AHU (maintenance and inspection work) is to provide adequate lighting.
Firefighting in case of fire
In general, the local fire protection regulations must be observed.
-
If the AHU is part of the smoke extraction concept, then the specifications of this concept have to be observed.
-
Otherwise, the power supply of the AHU must be interrupted immediately at all conductors. In addition, the dampers must be closed to consequently prevent oxygen supply and fire spread.
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Exposure to harmful substances in case of fire
In case of fire, some materials can produce noxious substances. In addition, harmful vapors can escape from the unit. Therefore, severe respiratory protective equipment is required and the danger zone has to be avoided.
Exposure to rotating parts / hot surfaces / electrocution
When working on and/or in the AHU note the following risks:
Indentation of body parts in moving parts (, fan impeller, external damper gear wheels ...).
Burns and scalds on hot AHU components such as heat registers, heat exchangers, ...
Electrocution on current-carrying parts such as electric motors, frequency converters, electric heaters, control cabinets, interior lighting etc.
Therefore must be ensured prior working on and/or in the unit, that
…
all current-carrying parts, such as cable plug connections, fan motors, valves, motors and electric heaters are disconnected from the power supply by using the repair switch (emergency stop) and that the switch is locked in position 'off' in order to effectively prevent a re-activation during the work. The housing of the AHU interior lighting (can have separate supply) is not current-carrying.
all moving parts, especially fan wheel, motor and heat wheel have come to a standstill; wait at least 5 minutes after switching off before opening the doors.
-
Remove the key from doors with door lock before entering in the casing of the AHU. Keep the key out of reach of unauthorized persons.
-
Check that the hot media supply is interrupted and all the heat registers, heat exchangers, etc. are cooled to ambient temperature.
In case of standstill of the plant (e.g. power failure), the repair switch is always to check. Only when it is in the off position and secured against unintentional restart, appliance doors can be opened, cable plug connections can be disconnected and work on the device can be carried out.
Start of the AHU
Be ensured after working and before the start that
…
nobody is in the AHU.
all protective devices are working, (optional safety devices such as door guard mounted again) and doors equipped with door locks are locked and the keys are removed
–
refer to chapter
.
Storage of potential energy in gases and fluids
All heat exchangers can be operating up to a maximum pressure of 15 bar. If the media is under higher pressures, the safety and tightness cannot be guaranteed.
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Preventing the risk of explosion and fire spread
To prevent the fire spreading, fire dampers shall be installed into the ducts between the fire compartments.
Prevention of exposure caused by antifreeze agents
Avoid body contact with antifreeze agents, because they may cause burns. Wear appropriate protective clothing (e.g. gloves, goggles, ...).
In case of fire, avoid the danger zone and meet different safeguards. It is recommended to wear a mouth guard, because of the risk of poisoning by inhaling the vapors.
Prevention of hazards caused by suddenly falling out door panels while opening of removable panels
Removable door panels can fall out after detaching the connections and lead to injuries. Particular at pressure-sided doors must be carefully, because they can firstly adhere and then suddenly detach. User must be able to carry the weight of the door. At doors with a surface of > 0.5 m² two persons are necessary.
Please note the instructions on the unit and subsequent instructions exactly.
2.3 Conformity to laws and directives
2.3.1 General
The AHU will be built and delivered according to the agreed specifications and exactly to your requirements. Due to the fact, that the AHU is a part of a system and that the unit is only after assembling and connection to the system ready for operation, it is normal, that the AHU is ready for operation only after plumber-work.
Depending on the particular application and country-specific requirements and laws it is possible, that the AHU does not meet the valid requirements at the ordered state at delivery.
Therefore, you
–
the customer and plumber of the AHU
–
are obligated
–
before commissioning of the AHU to check the conformity of the entire system to the valid laws and directive.
If there are any doubts about the conformity of the AHU with the local (on site) valid laws and directives, the AHU is just allowed to put into operation, if the conformity of the unit in the system is unequivocal guaranteed.
2.3.2 Conformity to VDI 6022
The ZHK Nano basic unit complies with the hygiene requirements of VDI 6022.
Tub in the outside-air intake section
The AHU ZHK Nano is not equipped with a tub in the outside-air intake section as standard. In order to fulfill the requirements of VDI 6022 a tub must be installed in the area of the fresh air intake section, depending on the location of the AHU. Additionally, the entrance of water, fog, snow etc. has to be prevented by a measure on site. If necessary an additional intake plenum with drain-pan has to be provided.
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On request an appropriate plenum can be offered. For this purpose contact your EUROCLIMApartner.
Maintenance-friendly accessibility of all components
All components of the air handling system have to be accessible on inflow and outflow side. This means that ducts with access door have to be provided on site in order to provide the accessibility.
Intake grids at openings of outdoor units
According to VDI 6022 all intake openings have to be equipped with an intake grid (mesh size 20 x
20 mm).
Such intake grids are not delivered by default by EUROCLIMA, but it is possible to order them as an option. Anyway, the mounting of intake grids at all intake openings has to be ensured on site.
Door adjustment at outdoor units
Hinged doors at outside units have to be secured by an appropriate fixture against shutting. Such equipment are not delivered by default by EUROCLIMA, but it is possible to order them as an accessory. Anyway, the system operator is responsible for ensuring such appropriate measures.
Manometer for filter monitoring
According VDI 6022 at a volume flow > 1000 m³/h manometer have to be installed for filter monitoring. These could be ordered at EUROCLIMA as an option. Anyway, the filter monitoring has to be ensured on site.
2.4 ErP conformity according to directive (EU) 1253/2014
The ErP directive (energy related products) determines minimum requirements to the efficiency of air handling units. Important points, for which the system operator is responsible, are:
Multi staged control
All AHU`s, except those with double application, have to be equipped with multi staged drive or speed control for fans. See chapter 7 (electrical connection) . Filter change indicator
If one or more filter stages belong to the unit equipment, than they have to be equipped with an optical display or an acoustic warning in the controlling. They will be triggered if the pressure drop at the filter exceeds the maximum permissible value. See chapter 9.3 (air filters).
If above mentioned equipment is not included in delivery of EUROCLIMA, it has to be provided on site.
2.5 Staff selection and qualification
All persons, who are authorized to work on the air conditioner, must have read and understood this manual - in particular
chapter 2 (Safety instructions)
. Before this is not guaranteed, the person may not begin to work on the AHU.
All work must be carried out by professionals who have sufficient technical training, experience and sufficient knowledge of…
-
Locally applicable safety and occupational health rules
-
Locally valid accident prevention regulations
-
Locally applicable standards and approved rules of practice.
All professionals have to recognize and assess the work, recognize and avoid potential hazards.
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Execution of the assembly, installation, electrical connection, commissioning and disposal:
by qualified electricians and AHU technicians.
Execution of maintenance / monitoring of the operation:
by technical staff or trained personnel and qualified electricians and AHU technicians.
Subsequently, warning triangles indicate warnings that must be followed to minimize risks to persons who are entrusted with the work on the air conditioner.
3 Reception control / unloading / transportation to installation site
3.1 Reception control
-
Upon arrival of the equipment, please check immediately the package for completeness and damage.
-
Loose supplied parts and assembly materials are in a nylon bag or a box in the unit.
-
If damages are found, immediately a damage report must be created and sent to EUROCLIMA.
Only then the transport company can make the claim against the insured (Note damage on the shipping documents with date and signature in the presence of the carrier). Complaints about apparent damaged or missing parts of the delivery cannot be subsequently recognized. In case of complaints please inform immediately the EUROCLIMA office.
-
Depending on the material used and the ambient conditions, a superficial corrosion may occur on components like e.g. motor shafts, fan shafts, clamping bushes, sheet cutting edges, and the like. The resulting corrosion layer protects the underlying material from further corroding and does not represent a defect of the component or the device (see also chapter 9 ).
The packaged delivered goods may include multiple parts of the device. In this case, each part is secured against falling. Attention: narrow parts may tip over after removing the safeguard. Secure narrow parts against tipping over!
Thin sheet metals like roof, edges or fins are a source of injury! Gloves, safety shoes and long work clothes must be used.
Devices shall not be climbed. If unavoidable: weight must be divided by use of boards.
Figure 1: Do not climb on the unit!
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3.2 Unloading / transportation to installation location
Forklift, lift truck transport
In accordance with the EUROCLIMA drawing the AHU will be delivered as one or more delivery section(s). The AHU parts are delivered on pallets and can be unloaded and moved by forklift or lift truck. Forces must always act on the base frame, see
A vertical lifting / transport or handling of EUROCLIMA AHU’s in any way is not allowed. Exceptions have to be agreed with EUROCLIMA.
Figure 2: Transport correct Figure 3: Transport incorrect
Center of gravity must be centrally located between the forks (see
Figure 4 ). For large parts use
several lift trucks.
Figure 4: Center of gravity centrally between the forks
For the overlifting directly from the truck applies the following
chapter 3.3 (Lifting of ZHK Nano units)
.
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3.3 Lifting of ZHK Nano units
The ZHK Nano basic unit is usually delivered as monobloc, see Figure 5 . If there are any addi-
tional unit sections, the same specifications apply for lifting the unit, which are described below.
Figure 5: Delivery unit monobloc
-
In addition to the actions mentioned here, the instructions according to chap-
have to be observed.
-
Parts of the AHU may only be lifted with lugs individually - never screw parts together before lifting.
-
Lateral load on lifting lugs is not allowed.
3.3.1 Weight specifications of units or unit parts
Depending on the unit type, the ZHK unit or additional sections have following weights, see Table
1 . The delivered crane lugs may be used for lifting ZHK Nano units which have these maximum
weights. It is required, that the weight is equally distributed on all 4 correctly mounted crane lugs. If there are more than one unit part, they must be lifted separately. type 45 weight in kg type 55 weight in kg type 65 weight in kg basic unit with plate heat exchanger 380 480 660 basic unit with heat wheel optional chiller (additional part) optional E-heating coil (additional part)
355
80
115
465
100
140
650
120
155
Table 1: Weight specifications ZHK Nano basic units and additional parts
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3.3.2 Mounting of crane lugs
4 crane lugs are supplied in two versions
–
mirror inverted. These lugs must be mounted at the provided positions at the base frame of the unit.
Execution of the lifting lugs (see Figure 6 ):
1. Right-side type
2. Left-side type
Attention to correct mounting of the crane lug according Figure 8 .
Figure 6: Right-side and left-side crane lifting lug
Figure 7: Crane lug dismounted Figure 8: Crane lug mounted
Screws and nuts are delivered with the lifting lugs and must be tightened with the torque according
to Table 2 . If the lifting lugs are already mounted by EUROCLIMA, the screws must be checked
before lifting of the AHU.
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Base frame height
Figure 9 : Base frame height
Base frame height H (mm) Screw type
80 M8x20
Nm
10
Table 2: Tightening torque for screws
-
The force effect has to take place uniformly across all four crane lugs.
-
The definition of the load carrying equipment is the responsibility of the executing company.
-
The correct guiding of the load carrying equipment according to Figure 10 must be observed.
-
After the pre-positioning of the delivery section at the desired position, remove the lifting lugs and use them for the next delivery section.
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Figure 10: Guiding of load carrying equipment (schematic illustration)
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3.4 Further necessary actions for the overlifting of both, delivery sections on crane lugs as well as monoblocs
-
The AHU sections or monoblocs must be lifted with appropriate equipment e.g. belt with hook.
-
The recommended minimum load capacity per load carrying equipment is
50% of the total weight of the delivery section or monobloc.
-
The length of the load carrying equipment must permit a favorable course, see
-
The course of the load carrying equipment must be chosen so that overhanging attachments, roofs and the like will not be stressed or damaged.
-
Load carrying equipment shall not run over sharp edges and is not allowed to be knotted.
-
The load carrying equipment must be secured against slipping off.
-
After a slow lifting from the floor for a few centimeters the correct course of the load carrying equipment as well as the safe support of all fastening elements should be checked.
Before further lifting it must be checked, that no abnormal deformation at the suspension points/load carrying equipment can be detected by visual inspection.
-
Avoid jerky lifting.
-
Make sure that nobody is under the raised load.
-
Never lift AHU sections or monoblocs on heat exchanger connections or other attachments.
-
The load carrying equipment is not permitted to exceed an angle of maximum
15 ° to the vertical and must be spread apart to avoid damage to the casing, refer to
max. 15°
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Figure 11: Permitted angle for load carrying equipment guidance
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3.5 Storage
The delivery sections generally are packed in nylon. This package is suitable to protect the AHU during loading and unloading from bad weather, but not for outdoor storage. The insertion into a dry area after unloading is therefore essential for the preservation of the unit.
Standstill maintenance
Prolonged standstill times can cause damage on motors, fans or pumps.
To avoid damage on to bearings, the rotors should be moved manually a few turns about once per month. If the period between delivery and commissioning is more than 18 months, then components must be checked and if necessary replaced.
Removal of nylon packaging
Remove the nylon packaging after delivery and place the units in a dry, weather protected area: the risk of corrosion due to the lack of ventilation in combination with a higher humidity under the nylon packaging is present
–
e.g. white rust may be formed within a short time on galvanized surfaces. It can further arise an excessively high temperature under the packaging, which can also cause damages at the components.
If you want to give pleasure to yourself, the planner, the owner and other observers of the AHU, then we strongly recommend to cover and protect the unit against dirt and damage during the installa-
tion and commissioning, see Figure 12 .
Figure 12: Protection against dirt
4 Foundation / erection
Space requirements:
At the location, proper maintenance and the removability of build in components shall be physically possible. Therefore a free working space of unit width + 300 mm shall be available. On the back site for mounting a 600 mm width passage should remain free.
According to EN 13053 and VDI 3803 it is not permitted, that the bottom of the AHU replaces the building roof. Furthermore it is not permitted that the AHU takes over any function of the building, neither in terms of tightness nor insulation.
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4.1 Foundation
Recommended are solid foundations of reinforced concrete, as shown in Figure 13 left, or strip
foundations, as shown in
right. For strip foundations, concrete or steel beams shall be
bottom-right. Steel beams constructions must have an appropriate stiffness in relation to the unit size. The foundation must be flat and leveled, it may not have fall in any direction or uneven surfaces.
Figure 13: Solid foundation and strip foundation
AHU’s have to strain via baseframe in longitudinal direction and cross direction optionally in form of strips or point like the foundation.
A collocation on underlayment with impact sound insulation properties selected as state of the art is highly recommended.
The following conditions are to comply:
-
Underlays position: optionally in form of strips or point like below of the AHU-baseframe.
-
Distance between underlays lengthwise and widthwise not more than 1500 mm
level difference between 2 adjacent underlays not more than 2 mm
-
The total height difference of all underlays after completed positioning of the AHU may not exceed 5 mm.
-
If because of uneven basement or basement deflection the abovementioned conditions are not fulfilled, the requested overall level difference of 5 mm has to be ensured.by means of appropriate measures (for example distance metal sheets).
Attention!
If these requests are not met, this may be the cause of jammed doors and dampers and other problems with the AHU.
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4.2 Erection
Instruction and Operation Manual ZHK NANO
4.2.1 Potential risks that may arise through the erection site
-
For heating or cooling water or water-glycol circuits can be connected to the AHU.
-
The pipes or hoses and their fittings can become leaky or loose, so that inside or outside of the
AHU water or the medium exits.
-
Cooling processes can cause dehumidification and the associated formation of condensation in the AHU. The unit is then equipped with condensate collecting trays and outlets. Nevertheless, condensate can exit from the AHU in case of errors on the unit, under inadmissible or extreme operating conditions. Errors on the unit, inadmissible or extreme operating conditions can also cause the formation of condensate on the outer surfaces of the AHU, which may then drip down.
-
Internal and external cleaning - also wet cleaning - can be performed on the AHU. When performing this work, an exit/dripping down of the cleaning fluid is possible.
4.2.2 Actions to prevent potential risks
These risks can be prevented by the following actions:
-
It does not matter, whether the AHU is floor standing, heightened (e.g. on a scaffold) or suspended from the ceiling, the easy assembling and maintenance of the unit has always to be guaranteed on site
-
Depending on the erection, suitable protective actions must be taken to ensure that persons, building and equipment are not jeopardized by falling parts (e.g. tools, screws, etc.) and possible exit of water or other media.
-
The ground around the erection site should be watertight and executed with a downward gradient to a sufficiently sized outlet.
-
Where this is not met, the erection of the AHU in a sufficiently sized collecting tray with an outlet may be an appropriate solution.
-
A humidity sensor with alarm transmitter can represent an additional action to protect critical operating conditions.
-
For units suspended from the ceiling, it is recommended in any case to provide a sufficiently dimensioned collecting tray with outlet under the unit.
The customer has to take the decision on appropriate actions, with knowledge of the situation on site. The installation technician and the operator of the air handling unit have to ensure the preventive protection in accordance with the instructions mentioned herein. In this context, it is recommended to conclude an insurance against damage caused by water and other liquids.
EUROCLIMA is not liable for damages that may arise due to leakage of the AHU, of fittings, of pipes or hoses or due to condensation.
4.2.3 General indications for the erection
The AHU sections must be precisely aligned and the front sides shall be exactly parallel to the other. If necessary, some minor corrections can be made by placing steel plates under the section.
After the prepositioning the AHU-sections can be pulled together with belts which act on the base
frame, as shown on Figure 14 and Figure 15 .
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Figure 14: Pulling AHU sections together Figure 15: Pulling AHU sections together (detail)
For noise insulation, it is recommended, depending on the location of the erection, to underlay the
AHU with cork, Mafund plates or Sylomer strips. The used absorbent material must be adjusted to the load to achieve optimum noise insulation. The providers of such products indicate the respective design criteria. For the weight specifications see the technical data sheet. For standard units without feet the maximum allowed distance between the layup points is 1500 mm. Floor units must
be fixed on the foundation to secure the position. A direct coupling, see Figure 16 left, should be
avoided because of structure-borne sound transmission. If you use structure-borne sound insulated underlayment, the fixing by lugs is particularly suitable to avoid the displacement of the AHU
in all directions ( Figure 16 right).
Figure 16: Securing the position on the foundation
If units will be erected on roofs, a structural engineer must design the attachment of the unit, based on the local situation and weather impacts.
If floor units shall be mounted on the ceiling, then the device must be fixed with the base frame on
an encompassing suspension see Figure 17 right. The handling of the structure-borne noise insu-
lation is analogously as for floor units.
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AHU which are not designed to stack, may not be stacked (one on the other).
Lightning protection for roof units
A lightning protection, especially for roof units, must be professionally installed on site according to national rules. Otherwise, a fire can be caused by a lightning strike.
5 Assembly
If climbing on the unit is unavoidable during assembly, as for example for connecting the roof plates, it must be ensured by appropriate measures, e.g. using boards, that the weight is distributed evenly, in order to avoid bending of the roof panels.
5.1 Assembly of casing
5.1.1 Actions before the assembly of casing
If several AHU sections have to be connected, then the procedure after the pre-positioning of the sections is as follows:
Remove crane lugs
If lifting lugs are mounted, remove them. To set the unit in the exact assembling position, it can be moved by a rod (leverage).Use the rod only on the base frame profile.
Applying the sealing strip
Figure 18: Sealing strip Figure 19: Applying the sealing strip
For roof units as well as at device separations directly before or after a wet area (e.g. cooler), special actions for sealing the AHU must be carried out by using the supplied sealing agent (Sikaflex).
Further information will follow in
chapter 5.1.4 (Special features for roof units and device separations at wet areas)
.
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Figure 20: Sealing agent (Sikaflex)
Figure 21: Applying the sealing agent
5.1.2 Standard connections and connection components
Base frame connection
Figure 22: Hexagon bolt with locknut M8x20 /
M10x30 / M12x40
Figure 23: Screw connection of base frames
Connection viaconnection anglesand comfort compound
-
Connection angle
Figure 24: Hexagon bolt with locknut
M8x20
Figure 25: Connection angle Figure 26: Connection via connection angle
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Comfort compound
Instruction and Operation Manual ZHK NANO
Figure 27: Comfort compound
Figure 28: Connection via comfort compound
In any case, it is necessary to connect the device parts via the base frame, the connection angle as well as the comfort compound.
5.1.3 Assembly of delivery sections
Bring the delivery sections in the exact mounting position and push them together as near as possible. The screw holes on the flanges have to lie opposite now.
Moving delivery sections together
The precisely aligned and parallel flanges are connected with the enclosed screws. Initially, all screws are only loosely screwed as follows:
-
In the base frame profiles ( Figure 29 ).
-
In the connection angles located in the upper corners of the unit ( Figure 30 ).
-
For roof units in the roof flange.
Figure 29: Screw connection base frame Figure 30: Screw connection angles
After placing all the screws loosely they shall be tightened - starting with the base frame
–
in two stages.
5.1.4 Special features for roof units and device separations at wet areas
For roof units as well as at device separations directly before or after a wet area (e.g. cooler), special actions for sealing the AHU must be carried out:
1. The sealing agent (Sikaflex) has to be applied instead of the sealing strip across the whole
flange of the unit, 5 mm from the inner edge (see Figure 32
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2. If the unit separation is accessible at the inside via a door
(see Figure 35 ), then the joints
( Figure 36 ) have to be closed over the entire circumference with the supplied sealing agent
(Sikaflex) after screwing together the delivery sections.
Note: To prevent leaks, these actions shall also be performed when extreme operating conditions are expected or wet cleaning is planned!
Figure 31: Sealing surfaces Figure 32: Sealing the frontal joints
Only careful sealing secures the long tightness of the unit. For roof units, also the roof flange is to
Figure 33: Sealing the roof flange
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Roof flange
Unit flange
Figure 34: Applying the sealing agent on the frontal joints
Joints
Joint
Access (door)
Figure 35: Unit separation accessible via door
Figure 36: Sealing the section connection (joint) with the sealing agent
5.2 Doors
Doors with hinged lock
Door panels with hinged lock can be opened optionally to the right or to the left. Additional, this lock mechanism enables the easy removal of the door panel from the door frame.
In order to swivel the door to the left, proceed as follows:
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1. Open the hinged locks to the right ( Figure 38 )
2. Pull on the flaps in order to swivel the door panel and to get access to the components in-
Figure 37: door panel with hinged locks
Figure 38: opening of the hinged locks
Removable door panel ZIB (ZHK)
Figure 39: swiveled door panel
Beside the hinged doors, the access to the inside of units with INOVA-casing is also possible by removable panels. At this casing execution the door panels will be fixed at the door frame by screw connections (see figure beneath ).
Figure 40: fixing screw with clamping piece (ZIB)
Figure 41: fixing mechanism at door frame (ZIB)
Figure 42: fixed door panel (ZIB)
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Pay attention at removable door panels, because after undoing the connection they could fall out and lead to injuries. Therefore, use always both hands for fixing, undoing and manipulating of door panels!
Attention: Pressure-sided doors represent an increased risk of injury. While opening. They can firstly adhere due to the pressure-difference, and then suddenly detach and fall against the user. The user could also be skidded backwards.
Therefore, particularly at opening of pressure-sided doors it must be very carefully. Open the door panel carefully and detach it slowly from the sealing. At suddenly detaching of the panel the user must be able to carry the weight of the door. At doors with a surface of > 0,5 m² two persons are necessary.
5.3 Dampers
The close position of the dampers is indicated as shown in Figure 43.
Figure 43: Closed position
-
It is not permitted to drill in the damper, otherwise it may cause damage to the gear wheels and the function of the damper is no longer ensured.
-
The dampers must not be strained.
5.4 Filters
-
Filters, with the exception of laterally removable prefilters, are supplied loose and must be installed on site.
-
Ensure proper insertion of the filter media (the bound filter media side on the unclean air side).
-
During the installation it must be noted, that the filter bags will not be clamped or damaged.
Each filter bag must freely adjust itself in the airstream.
-
If the filters are not included in the scope of delivery of EUROCLIMA, it must be considered that the used filters fulfills the requirements of VDI 6022.
Incorrectly mounted filters can be sucked in by the fan and lead to its destruction.
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5.4.1 Laterally removable prefilters
The filters are supplied mounted and are equipped with a pull-out tool for more than one filter per guiding.
Figure 44: Pulling out the filters Figure 45: Pull-out tool
5.4.2 Laterally removable bag filters with clamping mechanism
When inserting and fixing the laterally removable bag filters with clamping mechanism has to be proceeded cautiously, so as not to damage them. The installation of laterally removable bag filters must be carried out as follows:
1. First, move all levers of the clamping rails toward the door opening ( Figure 46 ).
2. Slide one filter after the other in the filter frame ( Figure 47 ).
3. Press the last filter of the row against the rear panel. Then press with the lever the filter cells
against the sealing ( Figure 48 ).
Figure 46: Loosen the clamps Figure 47: Slide in the filters Figure 48: Clamping the filters
Attention: For soft bags the lower bags of the filter cells are to lift up in order to
prevent damage with the clamping system ( Figure 49 )!
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Figure 49: Lifting the filter bags
Attention: If different widths of filter are planned for one filter frame with clamping mechanism, then the order of the insertion have to be according the filter frame raster (see figure beneath ). Otherwise it leads to an air bypass.
Figure 50: filter frame for different filter sizes
Figure 51: consider the order according the filter frame raster
Figure 52: filter section with inserted filters
Attention: Filters must be pushed completely to the back, so that all filters all around fit closely to the filter frame and an air bypass is avoided. For checking
purposes, examine if the first filter fits closely to the sealing. ( Figure 54 )
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Figure 53: pushing and clamping of the filters to the rear wall
Figure 54: check, if filter lie on the sealing
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6 Installation
6.1 Heat exchanger connection
6.1.1 General notes
Before connecting the heat exchanger, the piping system must be rinsed thoroughly.
An absolutely stress-free connection has to be ensured and the transmission of vibrations and longitudinal expansion between the device and the piping system must be safely prevented.
In order to avoid corrosion due to water, the requirements regarding water quality, professional installation, commissioning and maintenance of VDI 2035 sheet
2 have to be complied.
Connection pipes with thread:
To prevent damage of the heat exchanger connection, it is necessary to hold against with a pipe
wrench during the screwing ( Figure 55 ).
Figure 55: Holding against with a pipe wrench
Recommended sealing material for threaded sleeves:
-
Water / glycol heat exchangers, use Teflon tape.
In these cases, hemp cannot be used as sealing material!
Connection pipes without thread:
If the connection pipes are executed without threads, then a mechanical, force-fitting connection
(STRAUB coupling) is recommended ( Figure 58 ). This coupling could be included optionally in the
scope of delivery of EUROCLIMA, if not, then it must be provided on site. In order to avoid a damage of the copper pipe of the heat exchanger due to mechanical force, a ring is used to reinforce
the copper pipe ( Figure 56 and Figure 57 ).
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Figure 56: copper pipe with reinforcing ring
Figure 57: copper pipe with inserted reinforcing ring
Figure 58: STRAUB coupling
Figure 59: mounted STRAUB coupling
Other types of connection, e.g. welding or soldering are not recommended by EUROCLIMA, because of risk of fire of neighboring materials. If one of those type of connection is chosen, the acting assembler carries the responsibility.
The piping of the heat exchanger should hinder a for maintenance required expansion of the heat exchanger as less as possible.
The connection of the heat exchanger is to execute as indicated on the label on the AHU (connec-
Figure 60: Heat exchanger connection
The heat exchanger operates according to the cross-counter-flow principle. Only preheat can be supplied for parallel flow operation on request.
1. All standard heating and cooling heat exchangers - counter flow
2. Preheat heat exchanger (freezing risk - on request) - parallel flow
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Hydraulic connection schemes of heating or cooling coil should be carried out as shown in the
with a three way valve as a mixing valve. Compared with a flow control using a straight-through valve this connection avoids unequal temperature profiles, in that way air heating or cooling is quite uniform along the coil surface.
Figure 61: Hydraulic connection scheme
To vent and drain the heat exchanger connection, valves are mounted (on request). To ensure correct operation must be ensured, however, that the vent is on the highest point of the whole water cycle and the drain at the lowest. Otherwise, the valves shall be mounted on another suitable point in the circuit.
Figure 62: Drain valve Figure 63: Vent valve
6.2 Drain for condensate and excess water
Each drain must be equipped with a siphon. Siphons are available as accessories from EURO-
CLIMA.
6.2.1 Standard siphons
A space-saving design of the necessary siphon height we can do on request. Contact your sales representative for detailed information.
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The following conditions are essential for correct operation:
-
At each drain a siphon must be connected.
-
Several drains may not be connected to one siphon.
-
The water from the siphon must run in a funnel.
-
Before starting, fill the siphon with water.
-
In case of outdoor units an antifreeze mechanism has to be provided on site.
The heights H1, H2 and H3 can be determined from the maximum negative pressure (p) and maximum pressure (p) in the section of the siphon or be determined by the information on the technical data sheet as follows:
Total pressure pges = 1196 Pa
Dynamic pressure pdyn = 83 Pa
Total static pressure pstat = pges
–
pdyn = 1113 Pa
1 mmWS = 9,81 Pa
H1 > 1113/9,81 = 114 mm + 15 mm (Safety) = about 130 mm
H2 = 65 mm
Siphon on suction side (in direction of airflow before the fan), see Figure 64.
H1 (mm) > p (mm WS)
H2 (mm) > p/2 (mm WS)
Figure 64: Siphon on suction side
Siphon on pressure side (in direction of airflow after the fan), see Figure 65.
H3 (mm) > p (mm WS)
H4 (mm)
0
Figure 65: Siphon on pressure side
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6.2.2 Ball siphons
If ball siphons with the below shown design are included in the delivery from EUROCLIMA, then the following items should be observed during installation:
Depending on the suction side or pressure side mounting position, the siphon body has to be in-
stalled so that the direction of the arrow (see Figure 66 ) corresponds to the flow direction.
- Pa =
+ Pa = suction side pressure side
Figure 66: Observe the mounting position - flow direction according to the arrow
Siphon on suction side (in direction of airflow before the fan)
Figure 67: Suction side execution
Siphon on pressure side (in direction of airflow after the fan)
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The black plug must be removed for the pressure side installation (see Figure 69 ).
Figure 68: Pressure side execution
Figure 69: Pressure side installation: remove the black closing plug
6.3 Duct connection
–
airside connection to AHU
Depending on the customer's requirements, EUROCLIMA devices are equipped with various accessories and options for attaching air duct elements like dampers, flexible connections, frames, panel flanges, etc.
If no such accessories are included in the scope of delivery, then the airside mounting of components of the duct system is made directly to the housing of the AHU. Depending on the device opening, this can be done directly on the panel flange or directly on the external panel of the device.
When connecting, make sure that the requirements listed below are followed.
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Requirements
-
Ensure proper performance of the AHU by avoiding of excessive pressure drops in the duct. To minimize the noise, the basic rules of the duct construction and acoustic design shall be observed.
-
A suitable seal (not included in the scope of supply) has to be installed between the device housing and the component of the duct system.
-
The aero-technical connections must be executed tension and torsion free, i.e. no forces / loads are allowed to be transmitted to the device housing by means of attached accessories such as ducts etc. The components on the system side must be fastened and supported separately.
-
Even if no flexible connection is included in the scope of delivery of the device, an elastic connection must always be installed to prevent structure-borne sound transmission between the device and the duct system. It is recommended to use an interposed elastic connection of at least 140 mm in width, which shall be installed unstrained between the duct and the AHU.
-
This elastic connection must have a sufficient flexibility and must be installed in a professional manner in order to avoid transmission of vibrations to the duct system.
-
For a proper performance of the AHUs the observance of the basic rules of the duct construction is necessary. By appropriate planning, dimensioning and execution of the duct system, increased pressure losses and flow noise in the duct are avoided.
Number of screws
The duct component are screwed as follows,
each at a distance of 120 mm from the corner
-
additional number of screws see Table 3
Length or width
Additional number of screws
< 915 0
>= 915 <= 1220
>= 1372,5 <= 1830
>= 1982,5 <= 2592,5
> 2745 <= 3202,5
>= 3355 <= 3660
> 3812,5 <= 3965
2
3
4
5
6
7
Table 3: Information on the screw distances
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Figure 70: Information on the screw distance
6.3.1 Insulation of fresh air damper
Before connecting the duct section, the flange of the fresh air damper must be insulated in the course of the fresh air duct insulation on site. This action is urgently required to prevent the formation of condensation by heat transfer.
If fresh air dampers are not integrated in the AHU casing, then also the damper frame must be insulated.
7 Electrical connection
-
The electrical connection must be executed in compliance with international regulations such as the Low Voltage Directive and the requirements of electromagnetic compatibility of national legislation and the requirements of the local electricity provider.
-
All electrical connections must be inspected annually and deficiencies (for example, loose cable strands, loose screw and clamp connection,...) must be eliminated immediately.
7.1 Connecting to an external protective conductor system
The AHU must be connected to an external protective conductor system. The AHU shall be either:
connected at the base frames or
alternatively, at the potential compensation, that is mounted on the flexible connection by EU-
ROCLIMA.
Furthermore, each electrical component must be connected to the protective conductor system.
The connection to the external protective earth system has to be executed according to EN 60204-
1, pt. 5.2. The minimum cross-sectional-surface of the earth at frequency converter has to be
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10 mm², otherwise 4 mm² at units with control. Depending on the cross-sectional-surface of the outer conductor, the requirements regarding minimum cross-sectional-surfaces of the protective earth system according to EN 60204-1, pt. 5.2, table 1 have to be considered additionally.
After assembling and installation the consistency of the protective conductor system has to be checked and documented according to EN 60201-1, pt. 18.2.
Correct direction of motor rotation is a result of direction of fan impeller rotation which is signed by
an arrow: for EC fan refer to Figure 71 .
Before connecting the motor check the rotating field of mains connection with a suitable device. Afterwards, connect the phases accordingly to repair switch.
Figure 71: Rotation marking of EC fans
Fastening torque for electrical connections on the control panel refer to Table 4 :
Thread
Ø
M4 M5 M6
Nm min. 0,8 1,8 2,7 max. 1,2 2,5 4
Table 4: Torques for the motor terminal board
Before connecting to the local power network, must be controlled, that the local power supply coincides with the motor requirements from the nameplate. In general the fan motors are designed for continuous operation. Abnormal operating conditions, particularly multiple start-ups at short intervals should be avoided, they may lead to thermal overloading of the motor.
7.2 EC motors
EC motors are variable through an integrated frequency converter. For operation, the supply voltage, a digital enable signal and an analog control signal are required for the speed control.
When using residual current circuit breakers (RCDs), the supply line must be protected by means of a pulsed current (type A) or an all-current sensitive (type B) residual current circuit breaker.
Cable type for motor connection
A shielded cable must be used for the motor cable (supply voltage) and the analog input signal, and the shield must be grounded on both ends (repair switch & motor).
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7.3 Repair switch (emergency stop switch)
According to the standards IEC / EN 60204 and VDE 0113, all hazardous facilities have to be equipped with a main switch which separates the plant from all active conductors of the main supply. This means that every single AHU must be equipped with such a repair switch.
Requirements according to DIN VDE 0660 and IEC 947-3 on a repair switch in RED-YELLOW execution:
1. Is used as a repair, maintenance or safety switch, because the actuation of the switch does not reset the control commands from control system.
2. Has clearly marked OFF (0) and ON (I) position.
3. In OFF position lockable, to secure against unauthorized or unintentional restart.
4. For outdoor installation the repair switch at least must be IP65.
5. Interrupts the power supply to the AHU (lighting can be excluded, refer to
).
6. Separates the electrical equipment from the main supply.
7. Is easily accessible
8. Mounted within sight of the AHU.
9. The allocation to the AHU can be clearly seen.
10. Emergency stop function : The repair switch (red switch with yellow background) must be connected to the control system with appropriate components in order to ensure the emergency stop function. Reset means that a manual start command
–
separate from repair switch
–
must be activated.
Figure 72: Repair switch
-
Control box is equipped with repair switch in execution RED-YELLOW as specified above
-
On responsibility of the client must be ensured that of the above specified Requirements according to DIN VDE 0660 and IEC 947-3 on a repair switch in RED-YELLOW execution are fulfilled a) items 7 to 9 b) item 10, implementation of emergency stop function in control system
7.4 Electric heaters
An electric heater is designed to heat the airflow, which is stated on the technical data sheet, from the specified air inlet temperature to the air outlet temperature. EUROCLIMA provides electric heaters with one or more stages according to customer requirements.
The control of the electric heater provided by the customer can be carried out in several ways:
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-
On-Off at single-stage electric heater (this type of control decreases the lifetime of the electric heater under circumstances significantly)
-
On-Off at multistage electric heater
-
Continuous (e.g. with suitable thyristor control)
Fire risk!
With electric heater in operation, the heating elements may arrive to a temperature of several hundred °C.
In case of malfunction
–
heater in operation without adequate airflow
–
inadmissible temperatures may occur. Plastic parts as for example filters, gaskets, droplet eliminators etc. close to electric heater may become damaged or even catch fire.
Subsequent damages up to fire spread to the building are possible.
In order to avoid the above mentioned risks EUROCLIMA provides as a standard electric heaters with 2 independent safety thermostats.
7.4.1 AHUs equipped from EUROCLIMA with control
Units, which are supplied from EUROCLIMA with control, are limiting the supply air temperature to a default value of 35 °C.
The execution and function as specified below is included in the EUROCLIMA delivery.
Control-side limitation of the air temperature after the electric heater
The control of the electric heater always takes place in such a way, that the air temperature after the electric heater never exceeds the permitted air temperature in the unit (40 °C, if not differently specified in the technical data). This item must be especially observed, when the air handling unit is only operated with a partial air flow (e.g. in times of reduced use of the building).
As the heat output of an electric heater is provided very quickly and with ON-
OFF operation in the full amount, arises a significant risk of overheating the unit, which results in damaging several components, especially when the unit is operated with low airflows.
For this purpose, the air handling is equipped with a supply air sensor, which directly measures and monitors the air temperature generated by the electric heater. The control engineering is used to ensure that the heating power of the electric heater is controlled so, that the temperature remains within the permitted air temperature in the unit.
Avoid overheating of AHU components by residual heat of electric heater
In order to avoid excessive heating of components by residual heat of electric heater control ensures that fan motor keeps on running for at least 5 min after cut off of electric heater! By the use
of an enabling contact (see Figure 76 ) the control engineering also ensures, that the electric
heater can only start its operation when the fan is running.
If in case of main power failure (for example lightning stroke) this automatic run cannot be ensured, AHU may become damaged by the residual heat of electric heater.
In order to avoid damages, an uninterrupted power supply is recommended. If AHU is not operated by an uninterrupted power supply after every main power failure an AHU inspection is requested as indicated in
.
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Safety concept
Electric heater power supply is equipped with 2 contactors in serial connection!
The 2 safety thermostats protect the AHU in two independent ways. First way: By hardware via contactors in the power supply; second way: by software via controlling. In case of failure contactors immediately cut off electric heater from power supply.
-
The 2 safety thermostats are connected in serial connection
-
The 2 safety thermostats are equipped with manual reset.
-
After triggering the reason for stopping must be detected and eliminated before reset of the thermostat!
Thermostat 1 (Figure 73 and Figure 74)
-
Position of thermostat body: fastened on electric heater at connection side, accessible by re-
moving the electric heater access panel.
Triggering temperature: pre-set
–
value must not be changed.
-
Sensor position: between heating bars.
-
Function: alarm stop in case of over temperature because of low airflow.
Cover cap on reset button
Reset button
Figure 73: Thermostat with cover cap on the reset button
Figure 74: Thermostat with uncovered reset button
-
Position of thermostat casing: fastened on outside panel of AHU casing
-
Triggering temperature: set to 70 °C
–
value must not be changed
-
Sensor position: downstream of electric heater in upper area of airflow
-
Function: alarm stop in case of over temperature because of missing airflow
Figure 75: Thermostat 2
Connection box may reach high temperatures. For connection use heat-resistant cables (admissible operation temperature min. 110 °C), for example silicone, Teflon or glass fiber insulated cables.
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Connection scheme for electric heater according to EUROCLIMA:
Enabling contact:
Fan is running
Figure 76: Connection scheme for electric heater
In case of dehumidification wheel downstream of electric heater, it is ensured that control rotates the wheel while electric heater is on (additional enabling contact).
7.5 Frost protection for plate heat exchanger
At low temperatures and high air speeds, the condensate in the plate heat exchanger can freeze and cause its icing.
For devices supplied by EUROCLIMA with control, this is prevented by a pressure monitoring of the plate heat exchanger and the temporary adjustment of the supply air volume flow.
7.6 Lighting
Depending on the number of delivered (optional) lamps, the assignment of the switches and junction boxes can be found below:
1 Lamp
> 1 <= 4 Lamp
1 switch
1 switch, 1 junction box
> 4 <= 8 Lamp
> 8 <= 12 Lamp
1 switch, 2 junction box
1 switch, 3 junction box
The lamps are mounted and supplied with one side connected and one side loose cables, with a sufficient length to be routed to the nearest junction box or the next switch.
The AHU will be delivered in parts, and for this reason the lights have to be connected on site in full responsibility of the client.
If the AHU will be equipped on site with lights, it is to make sure that wet sections (and air downstream), such as
…
sections with condensate, such as cooling sections
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Lighting with an at least protection of IP55 were used.
Switches or junction boxes mounted on the outside of rooftop units must also have at least protection class IP55.
For units with integrated control and lighting, an additional power supply for the lighting must be provided and separated from the power supply for the control cabinet. This ensures that the light also can be switched on during repair work, despite repair switch is switched off (prerequisite for access to the AHU).
8 Commissioning
8.1 Preliminary steps
-
Clean thoroughly the AHU and all components of dust, swarf and other debris.
-
Remove all loose parts like tools, etc. and documentation from the unit. Such parts can be sucked in by the fan and lead to its destruction.
check all bolt connections and electrical connections and retighten if necessary
-
Ensure that the duct pressure corresponds to the pressure for the nominal air flow and the pressure specified in the technical data sheet.
-
Ensure that all planned filters are mounted. Not mounted filters can overload the fan motor.
-
All cables must be checked for damage to the insulation and replaced if necessary.
Here are given some points, which could cause problems after transport or not appropriate unit handling.
-
Rotate the impeller of the fan by hand, to check whether it rotates freely.
-
Check the motor connection and the matching of the supply voltage at the rated voltage - a fluctuation of supply voltage between + -5% is permitted.
8.1.1 Airflow measurement by differential pressure measurement at the fan
The delivered airflow rate can be calculated or displayed from the measured differential pressure.
A so-called K-value and an associated formula are used for calculation or for input into display or control devices.
Usually, two different formulas and thus two different K-values are in use:
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Formula A
In this formula, the respective air density at the fan is taken into account.
The air density must be determined as a function of air temperature, air humidity, sea level and atmospheric pressure.
Formula B
In this formula, a variable air density is not taken into account.
Instead, a "fixed" air density of 1.20 kg/m 3 is assumed.
With the following formulas, the airflow rate can be determined from the pressure signal:
-
Airflow rate calculation
-
Airflow rate calculation
�̇ = � ∙ √
2 ∙ ∆�
�
� �̇ = � ∙ √∆�
V̇
Nominal airflow rate
K
A
K
A
– factor for formula A
Δp w
Measured diff. pressure
ρ
V
Air density at the fan m³/h m²*s/h k
B
Pa
Δp kg/m³
V̇
Nominal airflow rate k
B
– factor for formula B w
Measured diff. pressure m³/h
Pa m³/(h*Pa
0,5
)
If several fans in a fan section are operated in parallel with the same speed, then the total airflow rate is accordingly a multiple of the calculated individual airflow rate.
With the following formulas, the setpoint Δp w
can be determined for a certain airflow rate (e.g. for dimensioning a pressure sensor, for constant airflow rate control):
-
Target differential pressure calculation
-
Target differential pressure calculation
∆�
�. �
=
�̇
�
2
2
∙ �
∙ 2
∆�
�. �
=
�̇
�
2
2
∆p w.set
V̇
Target differential pressure Pa
Target airflow rate
K
A
K
A
– factor for formula A (s.a.) m²*s/h k
ρ
V
Air density at the fan (Nomim³/h kg/m³
Δ
V̇
B p w.set
Target differential pressure
Target airflow rate
Pa m³/h k
B
– factor for formula B (s.a.) m³/(h*Pa
0,5
) nal value)
Table 5: Formulas for airflow rate measurement
The corresponding K-factors of the fan are shown in the fan-motor data sheet or on the technical data sheet for the air handling unit. The data on the data sheet always refers to one fan.
The air density at the measuring point is to set up manually, depending on sea level, temperature and humidity. In most cases, 1.2 kg/m³ is a suitable value.
For AHUs supplied by EUROCLIMA with control, the airflow rate sensors are already preset.
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8.1.2 Heat exchanger
The heat exchangers, fittings and valves shall be tested for tightness.
Water heat exchangers
Normal heating, cooling coils filled with water and additives for freeze and corrosion protection:
-
Open vent valve.
-
Water valve is initially only to open slightly, so that the coil will be slowly filled with water. To avoid heat stress.
-
When the heat exchanger is filled, close the vent valve.
-
Water valve is to open fully, start the fan.
-
Subsequently, the entire piping system must be vented properly.
Attention!
For a temporary shutdown of the system, because of frost and corrosion, is to avoid that condensate is remaining in the pipes.
8.1.3 Electric heater
Observe specifications of
chapter 7.4 (Electric heaters)
-safety thermostats.
8.1.4 Filters
-
Before the commissioning, all filters should be checked for tightness, as otherwise they could be sucked in and could lead to damage.
-
The mounted differential pressure switches are pre-set according to the final pressure loss on the technical data sheet.
-
These ensure the output of a warning message when the final pressure loss is reached. The resulting maintenance actions are described in
8.2 Test run
After having done the preparatory work the unit can be started for the test run.
-
For testing the device and measuring the motor data and the volumetric flow rate, the device must be fully connected to the operational duct system.
-
The unit doors must be closed, because by eliminating the system-side pressure drop measurement errors will be the result.
Before starting the fan open the dampers! Fan may not run against closed dampers.
In addition, the actual powe r consumption of all phases’ sha ll be measured and compared with the nameplate. If the actual power consumption is too high, there is maybe a faulty connection. The system must be shut down immediately.
Measure the volume flow and the pressure difference. Often the measured airflow does not match with the design data of the device.
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Possible causes for low airflow:
-
The external pressure drop is higher than indicated on the technical data sheet.
e.g. closed fire or VAV dampers in the duct
If the airflow is incorrect, then please contact in doubt the competent EUROCLIMA office.
9 Maintenance
EUROCLIMA units are built mostly maintenance free and easy to maintain. The maintenance inter-
require different intervals, ask EUROCLIMA for details.
The entire unit and all components must be checked for corrosion, damage and fixing and, if necessary, they must be cleaned.
Depending on the material used and the ambient conditions, it can lead to a superficial corrosion on components like e.g. motor, fan shafts, pulleys, bushings, sheet metal cutting edges and the like. The resulting corrosion layer protects the underlying material from further corroding and does not represent a deficiency of the component or of the device. The removal of surface corrosion and treatment of the corresponding sites are generally not required. Depending on the material used, a superficial oxidation can be removed as part of regular maintenance and the appropriate site treated with suitable protective measures.
Before servicing any electrical parts such as fan motors, damper motors, electric heater etc. use the emergency-stop control devices, to separate the parts completely from the power supply. Indications of
chapter 2 (Safety instructions)
have to be observed!
Please understand that we cannot take care of damage caused by improper handling of solvents and cleaning agents, and no liability for mechanical damage. Solvents and cleaning agents may not contain alcohol for use on coated surfaces.
In order to avoid corrosion in case of components of stainless steel like drain pans or bottom take care that parts of carbon steel laying around are removed and stainless steel parts are cleaned from swarf of carbon steel.
For ordering spare parts please contact your EUROCLIMA sales partner.
EUROCLIMA recommends to perform maintenance and repair work in consideration of the specifications according to VDI 6022 sheet 1 chapter 5.
9.1 Electrical connection, control cabinet
All electrical connections must be inspected annually and deficiencies (e.g. loose cable strands, loose screw and clamp connection,
…) must be eliminated immediately.
The following maintenance work is recommended for the control cabinet of AHUs with integrated control:
annual change of the filter
annually check the function of the fan for the control cabinet ventilation (if present)
annually check the function of the heater (installed in roof units)
cleaning of possible dust deposits
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9.2 Fan / motor group
Instruction and Operation Manual ZHK NANO
9.2.1 Fan
-
Check for dirt, debris, damage and corrosion, clean if necessary.
-
Coat surface damage of the housing and impeller with zinc dust paint.
-
Flexible connections are to be checked for damage / visual inspection.
-
Check the protection grid (Fan in and/or outlet) if available for correct installation / damaged
(visual inspection).
-
Test the wheel by rotating it by hand for abnormal noises.
-
Deposits on the wheel can cause damage (risk of fatigue fracture) - impeller can burst - Danger!
-
Visual inspection: Check the wheel for any particular weld cracking.
9.2.2 Motor
-
Check the motor for cleanliness and clean if necessary.
-
Measure current consumption which must not exceed the rated current indicated on the nameplate.
9.3 Air filters
To ensure the performance and the energy-efficient operation of the air handling unit, the air filters must be replaced regularly. Use only filter types and filter sizes, which are intended for assembly. Please view the technical data for getting this in-
Figure 77: extract (filter section) of technical data
All filters should be checked for tightness, as otherwise they could be sucked in and could lead to damage.
If units are equipped with EUROCLIMA control, then a corresponding warning message is dis-
played on the HMI (see Figure 78 ) when the differential pressure limitation is reached.
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Figure 78: Warning message filter
If such a warning message is displayed, then appropriate actions have to be taken immediately
(e.g. change of air filters).
9.3.1 Panel filters
Dry panel air filters (cleanable). The contamination level of the filter can be controlled by the differential pressure drop (check every 14 days to 1 month). Reaching the pressure difference indicated in the technical data sheet, cleaning or replacement is required.
Cleaning:
-
Dirty filters dismount, tapping, suck off with a vacuum cleaner or clean it with air pressure (max.
5 bar).
-
Wash the filter in max.35 °C warm water with mild commercial detergent, then rinse thoroughly.
-
Let fatty filters about 1h in suds.
-
Not wrestle cleaned filter, let filters drain before mounting. The synthetic fibers dry quickly and can be installed and put back into service also if they are still wet.
-
Clean also the filter section before remounting the filters, check filter tightness and reseal if necessary.
-
Filters can be cleaned 2-3 times then a replacement of the filters is necessary.
Seals for panel filters and soft bag filters
Seals are self-adhesive and are supplied loose. Sealing: only the front side, only 1 sealing stripe
…
between the filters,
between filter and door,
between wall and filter.
9.3.2 Bag filters
Contamination level of the filter can be controlled by the differential pressure drop (check every 14 days to 1 month). Reaching the pressure difference indicated in the technical data sheet cleaning or replacement is required.
Bag filters of class G3, G4 are repeatedly reclaimable. Clean the bags from the dust airside with a vacuum cleaner. This cleaning can be repeated several times. If this cleaning is not sufficient, also
wet cleaning can be executed. Remove the bag filter, keeping the opening up, see Figure 79 .
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Figure 79: Transport of filter bags
Wet cleaning
-
Rinse the bag with upward opening with a not too strong jet of water. The mud must pass flushed through the filter material to the outside. Possibly, add to the water a little bit detergent.
-
Let the clean filter bags drain well, they can be remounted wet and immediately put back into service.
-
Clean also the filter section before remounting the filters, check filter tightness and reseal if necessary.
-
Filters can be cleaned 2-3 times then a replacement of the filters is necessary.
-
Filter elements in the clamping frame must be fitted with four springs per filter. Check air tightness!
-
Bag filter with class EU5 and above cannot be regenerated and must be renewed after the first lifetime.
9.4 Heat exchangers
-
For prolonged standstill, we recommend the complete emptying of the heat exchanger.
-
At each refill the heat exchanger must be vented properly.
9.4.1 Medium water
Heat exchangers special maintenance is not required, only occasional cleaning is recommended.
Depending on the hours of operation and filter maintenance approximately every three months, the heat exchanger fins shall be check for dust contamination, debris and cleaned if necessary. The piping is to check for leaks.
Cleaning
Cleaning is carried out in the mounted state with a strong vacuum cleaner from the dust airside.
For strongly adhering dust the heat exchanger can be dismounted and cleaned with water. Galvanized steel coils can be cleaned with steam cleaner or by washing the fins with a strong water jet.
You may take a soft brush to help, but not damage the fins.
The fins of copper-aluminum heat exchangers are particularly sensitive, therefore, use water with low-pressure for cleaning. Damaging the fins by mechanical force leads to premature deterioration of the heat exchanger.
Corrosion spots must be cleaned and protected with zinc dust paint.
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Antifreeze protection
Check antifreeze activity before each winter season. Check frost protection thermostat for correct setting.
Drain pan
Drain pan and drain should be checked for debris and cleaned, if necessary
–
clean here
Figure 80: Cleaning of air coolers
Droplet eliminator
Check droplet eliminator about once a year for contamination. Remove fins and clean if necessary.
Contamination can cause damage by water drops and reduce the performance of the device.
Please make sure that the fins are installed properly and are not bent.
Pollutants can cause poor performance of the AHU as well as damage due to drop flight.
9.4.2 Electric Heater
-
When working on the electric heater, refer to instructions in
chapter 2 (Safety instructions)
.
-
Check electric heaters for dirt and corrosion, clean heating elements if necessary.
-
Check built-in safety devices and electrical parts for proper functioning.
9.5 Dampers
EUROCLIMA dampers of type J are nearly maintenance free. Check for dirt, damage and corrosion, clean if necessary with compressed air or steam jet. Check the function and correct rotation.
Spray the wheels with silicone spray if necessary.
Warning!
Gears cannot be treated with organic oils! Check linkages, tighten the screws if necessary.
9.6 Weather louver
Check for dirt, damage and corrosion, free from leaves, paper, etc.
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9.7 Energy recovery systems
Instruction and Operation Manual ZHK NANO
9.7.1 Plate heat exchangers
Plate heat exchangers are made of highly corrosion-resistant high-grade aluminum and have no drive or moving parts. The lifetime is nearly unlimited, as long as the differential pressure between the plates does not exceed the max. allowed.
The only maintenance required is cleaning:
-
Clean the condensate drain, control and fill the U-trap. The plate pack is normally self-cleaning. o Removed fibers and dust at the exchanger inlet with a brush. o Clean oils and fats with hot water, household cleaners or degreasing steam.
-
If there is a bypass damper, please refer to
.
9.7.2 Heat wheels
Check the drive unit according to manufacturer's instructions.
In general:
-
The construction of the storage mass is nearly complete self-cleaning.
-
The rotor can be cleaned with compressed air, water, steam and grease-dissolving household cleaning products.
-
The sliding seal, which seals the rotor, is to check and adjust if necessary.
9.8 Maintenance plan
The maintenance intervals specified in Table 6 are based on empirical values for normal operating
conditions. They are designed for continuous operation (24 hours / day) in moderate temperate climates and low dust areas, such as in offices or shopping malls. Widely differing operating conditions, particularly with respect to air temperature, humidity and dust can significantly shorten the intervals.
Ch = Check, Cl = Clean, M = Maintenance
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Component
Housing
Fan / motor
Filter
Heat exchanger
Electric heater
Dampers
Weather louver
Energy recovery
Control cabinet
Action
Ch / Cl
Ch
Ch
Ch
Ch / Cl / M
Ch
Ch / Cl / M
Ch / Cl / M
Ch / Cl
Ch
Ch / Cl
Ch / Cl
Ch / Cl
Ch / Cl
Ch / Cl
Ch / Cl
Ch / Cl
M
Ch
Ch
Ch
Section monthly ¼ year ½ year year
Housing inside and outside
Corrosion check
Flexible connection
Protection grid
Motor, general
Check current consumption
Panel filters
Bag filters
Fins
Frost protection
Drain pan
Droplet eliminator
X
X
X
X
X
X
X
X
E-heater X
Check e-heater section for thermal damages after mains supply failure!
X Dampers
Weather louver, grid and hood
Plate heat exchanger
Heat wheel X
X
X
X
X
X
X
Filter X
Fan
Heater bolts, electrical connections
X
X
X
Table 6: Maintenance plan
Reference chapter
9.1 Electrical connection, control cabinet
10 Information on airborne noise emitted by the air conditioning units - on request
Sound data can be printed on request on the technical data sheet, sample see Figure 81 . The
sound power is specified as A-weighted sound power level:
-
Line 1: Sound power over the casing
-
Line 2: Sound power inlet
-
Line 3: Sound power outlet
The sound through the openings (sound power level in line 2 and 3) is the basis for the calculation of the on-site sound emissions from the environment.
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Figure 81: Sound data information
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11 Disassembly and disposal
Instruction and Operation Manual ZHK NANO
11.1 Disassembly
At disassembly, the safety instructions of
chapter 2 ( Safety instructions ) must be considered. It
also apply the instructions in
Disassembly of the housing:
-
Disassembly of the external panels and removal of the insulation.
-
Loosening of the screw connections.
-
Loosening of the rivet connections by drilling the rivets.
Disassembly of the built-in parts:
-
Secure slender components against tipping over.
-
Use of appropriate scaffolds and load carrying equipment.
-
The AHU components must be raised with suitable load carrying equipment (e.g. belt with hook or shekel with chain) and have to be secured until the components are safely fixed in the unit
–
-
Handling: securing with belt
–
see
Figure 82: Lifting with chain hoist Figure 83: Securing with belt
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11.2 Disposal
The operator is responsible for disposal of the shipment (packing material), operation (filters, tools, spare parts etc.), and for the disposal of the air handling unit itself.
The disposal of the material must be done by qualified technicians according to the international, national and local regulations.
A standard AHU consists of 95 % recyclable metallic materials.
Components (examples)
Material CER / EWC
European Waste Code
Casing panels, built-in components, base frames, heat exchangers
VZ and VZB sheet metal
Stainless steel
Aluminum
Copper tube
Copper cable
Mineral wool
Plastic, metal
170405
170405
170402
170401
170411
170604
150106
Copper cable
Casing insulation
Air filter
Droplet separator slats
Insulation profile ZHK
INOVA
Sealing tape
Piping
EC
–
motor
Electronic components
Plastic 150102
Guidelines for the disassembly and instructions for the disposal can be found in the appropriate previous chapters of this instruction manual or on the homepage of the manufacturer. Detailed information of the manufacturer can be found on the component.
Table 7: Information for disposal
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User manual
NANO V0.03
April 2018
Hotline
+39 335 1334212
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12 Display
12.1 Push buttons, rotary button
Figure 84: Display
The operation takes place via the elements described below:
Info-button return to the main / start page or application info page off green green flashing orange
Alarm-button off red flashing red
ESC-button push long
Ok-button
AHU off
AHU on
AHU is starting (preheating) or stopping
only one fan is running show alarms (see
no alarm not acknowledged alarm is active
alarms are active return to the previous menu page
cancel a value change display service page (contrast, color, backlight, brightness) multifunctional push and rotary button rotate push push long
select a menu / line, select / change value
ok, go to a submenu, confirm a changed value
go to the password page, log in / log out
possible at any time in any menu
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12.2 Display
The display is divided into several areas:
Headline
29.07.11 13:32 Stop/Alarm 1/8
Password level
▲
All settings
►
Operating mode Off
Further lines
Outdoor temp.
Supply temp.
Return temp.
Supply flow
▼
Return flow
13.2°C
21.7°C
20.3°C
5301m3/h
5298m3/h
Figure 85: Start page
Line current / total
Submenu
Values, states
Headline on the main / start page: date, time and AHU state
Further lines in a submenu: the current selected submenu arrows indicate additional lines above/below
Current line / total lines current selected line / total number of lines
Submenu
Values, states submenu, press Ok to go into the submenu display the current values, states and the setpoints / settings
The language can be selected via All settings
→ Language
.
Depending on the configuration of the AHU, more or less lines are displayed.
12.3 Password
For every entry a password is needed (except language selection); the current access level is displayed in the left top corner:
No key level 253 no change of settings possible, only a few parts of the menus are visible
(language selection is always possible)
1 key level 6 level 5 user level, change of setpoints / settings extra user level, special settings
Password for user level
1000
(for level 5 the password is: user password +1 → 1001)
After 10 minutes the display makes an automatic logout and returns to the main / start page.
12.4 Operation, value entry
For the operation of the display, the rotary button and the ESC -button are primarily used. The rotary button is used to select the desired line. Depending on the type of line a value / state is displayed, a setpoint is entered, a setting is made or a submenu is selected.
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Line with submenu
An arrow right next to the line indicates a submenu; the line can be selected with the rotary button and the submenu can be entered with Ok .
Value, setpoint
Select the line of the setpoint to be changed and confirm with Ok ; a new page displays the setpoint with the limits and the location of the setpoint within the limits with an arrow on the bar.
Keep turning the rotary button until the desired value is set to change a value; after prolonged turning the active position will automatically switch to the next higher (once 10 numbers have been run through); if the rotary button is not turned for some seconds, the active position will switch back to the next lower. For better orientation this is illustrated by an arrow above the number. Thus, large numerical ranges are adjusted quickly.
▼
2500 m3/h
0m3/h 5000m3/h
↓
└───┴───┴───┴───┴───┴───┴───┘
Figure 86: Set value, setpoint
Selection, setting, function
Select the line of the setting / selection / function to be changed with the rotary button and confirm with Ok; A new page displays a list of possible settings with a √ next to the current setting. Select a new setting with the rotary button and confirm with Ok .
1/5
√RetCasc
Supply
Return
RoomCasc
Room
Figure 87: Selection (e.g. supply air control)
ESC-button
The ESC -button has different functions:
During the change of a setpoint or setting, this will be cancelled and the old value is retained
Within a menu to return to the next higher menu
By pressing and holding the button, the system page of the display is called up; there the color, contrast and brightness of the backlighting can be changed
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Adjustability
If a line is selected, the text appears on the left white on a black background. Is also the value white on black background, then the value is adjustable, otherwise not. An adjustment is not possible without registration.
Temperature setpoints 8/13
▲
Supply temp.min
16.0°C
Supply temp.max
35.0°C
Saturation temp.
Summer compensation
Heat set
Cool set
Controlled temp.
14.0°C
0.0°C
►
16.0°C
35.0°C
0.0°C
Figure 88: Value adjustable
Temperature setpoints 9/13
▲
Supply temp.min
16.0°C
Supply temp.max
35.0°C
Saturation temp.
Summer compensation
Heat set
Cool set
Controlled temp.
14.0°C
0.0°C
►
16.0°C
35.0°C
0.0°C
Figure 89: Value not adjustable
13 Main / start page
The main / start page with the most important values and settings of the AHU is displayed after powering on the controller:
29.07.11 13:32 Stop/Alarm 1/8
▲
All settings
►
Operating mode Off
Outdoor temp.
13.2°C
Supply temp.
Return temp.
Supply flow
▼
Return flow
21.7°C
20.3°C
5301m3/h
5298m3/h
Figure 90: Main / start page
Date, time and AHU state / operating mode source
Submenu for all settings
Operating mode (switch on / off the AHU)
Temperatures (outdoor, supply air, return air, ...)
Humidity (supply air, return air)
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Air flow rate, duct pressure and fan speed
Power of the recovery
Valve positions and pumps for heating and cooling batteries
Humidifier
The state display shows the current operating mode / operating mode source of the AHU:
-
Start
Config
Stop / alarm no request start phase, initialization configuration changed; AHU blocked
AHU blocked (Alarm emergency stop)
Display
BMS
Room unit
Scheduler command from operating display command from BMS command from room unit command from scheduler
The different possibilities of the request (switching AHU on / off or operating mode) have different priorities; so the AHU is switched off when the command from the display is Off , even if the scheduler or the BMS request is economy or comfort. The priority corresponds to the above list; “Config” has the highest and “Scheduler” the lowest priority. Appears in the display
-, then there is no request active (display, BMS and room unit have the state Auto , the scheduler is not active).
13.1 All settings
By the line All settings , the submenu All settings can be entered; by several submenus the display pages for setpoints, operation mode, alarm state, password handling and language setting can be entered.
All settings 1/4
Setpoints/settings
Operation mode/scheduler
Alarm state
Password handling
►
►
►
►
Language English
Figure 91: All settings
Setpoints / settings
Operation mode / scheduler
Alarm states
Password handling
Language setpoints for temperature, humidity, air quality, … operation mode, scheduler, date / time setting alarm states enter passwords, change passwords language selection (English, Italian, German)
14 Setpoints / settings
The setting of the setpoints is performed separately for the airflow rate, temperature, humidity, air quality and night setback.
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Setpoints/settings 1/4
Flow rate
Temperature
Humidity
Air quality
►
►
►
►
Night setback
Figure 92: Setpoints/settings
14.1 Fan setpoints
The air flow rate, duct pressure, fan stage or fan speed is set via this page of the display; depending on the operating mode, more or less or no settings can be changed.
14.1.1 Operating mode of the fan control
The fan control has 3 possible operating modes; the operating mode is set during the commissioning and cannot be changed.
Airflow rate control
Fan setpoints 1/6
Supply Eco
Supply Comfort
Return Eco
Return Comfort
2500m3/h
5000m3/h
2500m3/h
5000m3/h
Night setback
-----------------------------
Supply set 0m3/h
►
Figure 93: Airflow rate control
At the airflow rate control, one setpoint for economy, comfort mode and night setback will be set separately for supply and return air. Thus, it can be adjusted as desired overpressure (supply airflow > return airflow) or a negative pressure (supply airflow < return airflow). The setting is made in m³ / h. The last 2 lines show the current setpoints for the fan control.
If an air quality control by means of the airflow rate is active, the maximum airflow rate for poor air quality can also be set. The resulting airflow rate is then the maximum of the setpoint for economy / comfort mode and air quality control. Thus, the selected airflow rate is always adhered and increases due to poor air quality. The setting is made in the menu Air quality, which can be entered directly.
If the dehumidification by means of the airflow rate is active, the maximum airflow rate for high humidity can also be set. The resulting airflow rate is then the maximum of the setpoint for economy / comfort mode and the dehumidification control. Thus, the selected flow rate is always adhered and increases due to high room humidity. The setting is made in the menu Humidity , which can be entered directly.
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In the night setback mode, the rooms can be cooled with the cool outdoor air outside normal working hours; all heating batteries, cooling batteries, recovery systems, humidity and air quality control are disabled. The setting is made in the menu Night setback , which can be entered directly.
If a room unit or remote switch is connected, the airflow can be changed via this with a corresponding configuration (offset).
Setpoint Description Default
Supply Eco Supply airflow rate for economy mode
Supply Comfort
Return Eco
Supply airflow rate for comfort mode
Return airflow rate for economy mode
Half nominal airflow rate
Nominal airflow rate
Half nominal airflow rate
Return Comfort
Supply set
Return set
Return airflow rate for comfort mode
Current supply airflow rate setpoint
Current return airflow rate setpoint
Nominal airflow rate
… m³/h
… m³/h
Table 8: Airflow rate setpoints
The setpoints for night setback, air quality and humidity control can be found in the chapters night
), air quality control ( 14.4.1.3 Fan speed ) and humidity control
Pressure control
When the fans are controlled by the duct pressure, the required pressure setpoint is set at commissioning separately for supply and return air and is equal for economy and comfort mode. This is visible, but can be changed only by service personnel. The current air flow rate is always visible on the main page.
An air quality control or dehumidification is not possible, because the amount of air cannot be changed and depends only on the external duct pressure.
If air quality control is provided by means of duct pressure, the maximum duct pressure can also be set at poor air quality. The resulting duct pressure is then the maximum of the setpoint for economy / comfort mode and air quality control. Thus, the selected duct pressure is always maintained and increased due to poor air quality. The setting is made in the menu "air quality", which can be entered directly.
If the dehumidification is activated by means of duct pressure, the maximum duct pressure can also be set at high humidity. The resulting duct pressure is then the maximum of the setpoint for economy / comfort mode and dehumidification control. Thus, the selected duct pressure is always maintained and increased due to high room humidity. The setting is made in the menu "humidity", which can be entered directly.
Setpoint Description Default
Supply duct press.
Supply air duct pressure setpoint See data sheet
Return duct press.
Return air duct pressure setpoint See data sheet
Table 9: Duct pressure setpoints
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Speed control
Similar to the airflow rate control the speed for economy, comfort and night setback mode can be set. The fans are operated at the set speed, regardless of airflow rate or duct pressure.
In addition, the speed is increased by air quality control or dehumidification when the air quality is poor or the humidity is high. Also, an adjustment of the speed for poor air quality and high humidity is possible. The setting of the speed for night setback, air quality and dehumidification occurs in separate menus, which can be entered directly.
Setpoint Description Default
Supply Eco
Supply Comfort
Return Eco
Supply fan speed for economy mode
Supply fan speed for comfort mode
Return fan speed for economy mode
40%
80%
40%
Return Comfort
Supply set
Return set
Return fan speed for comfort mode
Current supply fan speed setpoint
Current return fan speed setpoint
80%
...%
...%
Table 10: Speed settings
The setpoints for night setback, air quality and humidity control can be found in the chapters night
), air quality control ( 14.4.1.3 Fan speed ) and humidity control
14.2 Temperature setpoints
The control mode for the temperature control and the corresponding setpoints are set via the temperature setpoints. Depending on the execution of the AHU, additional calculated setpoints for the saturation temperature are displayed over which the dehumidification is controlled.
Temperature setpoints 1/13
Control mode
Actual mode Auto
Heat Eco
Heat Comfort
Cool Eco
Cool Comfort
▼
Room
RetCasc
Winter
18.0°C
20.0°C
24.0°C
22.0°C
21.0°C
Figure 94: Temperature setpoints
14.2.1 Operating mode of the temperature control
There are up to 5 operating modes for the temperature control, which can be set by the user. If no room unit is present, then only 3 operating modes can be selected. If the AHU is a pure supply air unit, then the return air control cannot be set. In order to make the right setting is the understanding of the individual operating modes very important. Service engineers or planners can give you more information.
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Return air cascade (RetCasc)
The return air temperature is used as a control variable. The supply air setpoints for the heating batteries and cooling batteries are calculated by the deviation between the current return air temperature and the setpoints. The activation of the valves and the recovery is performed based on the deviation between the current supply air temperature and the calculated supply air setpoints.
The calculated supply air setpoints cannot exceed the minimum / maximum supply air limit.
A dead zone can be defined between the setpoints for heating and cooling, by which a deactivation of the heating batteries and cooling batteries can be achieved (energy saving). They are deactivated as long as the return air temperature is in the dead zone. The adjustment of setpoints is performed separately for economy and comfort mode.
This control strategy combines the return air temperature control with a supply air temperature control. It is used when the return air temperature should be kept constant and can be used for infinitely variable heating / cooling batteries (water batteries).
Setpoint Description Default
Heat Eco
Heat Comfort
Heating setpoint for economy mode
Heating setpoint for comfort mode
18 °C
20 °C
Cool Eco
Cool Comfort
Cooling setpoint for economy mode
Cooling setpoint for comfort mode
24 °C
22 °C
Table 11: Setpoints for cascade temperature control
Supply air
The supply air temperature is used as control variable. The recovery, heating and cooling batteries are activated depending on the deviation between the current supply air temperature and the setpoints.
A dead zone can be defined between the setpoints for heating and cooling, by which a deactivation of the heating batteries and cooling batteries can be achieved (energy saving). They are deactivated as long as the supply air temperature is in the dead zone. The adjustment of setpoints is performed separately for economy and comfort mode.
This control strategy is mainly used in downstream heating or cooling units, which are not controlled by the AHU.
Setpoint Description Default
Heat Eco
Heat Comfort
Heating setpoint for economy mode
Heating setpoint for comfort mode
22 °C
24 °C
Cool Eco
Cool Comfort
Cooling setpoint for economy mode
Cooling setpoint for comfort mode
20 °C
18 °C
Table 12: Setpoints for supply air temperature control
Return air
The return air temperature is used as control variable. The recovery, heating and cooling batteries are activated depending on the deviation between the current return air temperature and the setpoints. This control is directly performed causing the supply air temperature is subjected to greater
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Instruction and Operation Manual ZHK NANO fluctuations. The limiting function of the supply air tries to limit the battery power to comply with the specified minimum and maximum values.
A dead zone can be defined between the setpoints for heating and cooling, by which a deactivation of the heating batteries and cooling batteries can be achieved (energy saving). They are deactivated as long as the return air temperature is in the dead zone. The adjustment of setpoints is performed separately for economy and comfort mode.
This control strategy is mainly used for stage controlled cooling / heating, e.g. in a cooling by means of a direct evaporator (compressor) and is better suited than the cascade or supply air temperature control, because the air temperature is subjected to greater fluctuations by the compressor and no constant supply air temperature is possible.
Setpoint Description Default
Heat Eco
Heat Comfort
Cool Eco
Heating setpoint for economy mode
Heating setpoint for comfort mode
Cooling setpoint for economy mode
18 °C
20 °C
24 °C
Cool Comfort Cooling setpoint for comfort mode 22 °C
Table 13: Setpoints for return air temperature control
Room cascade (RoomCasc)
This control strategy works the same as the return air cascade, only that the room temperature of a room unit or room sensor is used as control variable. The adjustable offset at the room unit affects the heating / cooling setpoints.
This control strategy is only available if a room unit or a room sensor is present and is used when the return air temperature is heavily distorted and is an inappropriate control variable or the room temperature should be used directly. The setpoint settings match the settings of the return air cas-
If a room unit and a room sensor are installed, then the room sensor is used and the sensor of the room unit has no function.
Room
This control strategy works the same as the return air control, only that the room temperature of a room unit or room sensor is used as control variable. The adjustable offset at the room unit affects the heating / cooling setpoints.
This control strategy is only available if a room unit is present and is used when the return air temperature is heavily distorted and is an inappropriate control variable or the room temperature
should be used directly. The setpoint settings match the settings of the return air ( 14.2.1.3
If a room unit and a room sensor are installed, then the room sensor is used and the sensor of the room unit has no function.
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14.2.2 AHU with 3 batteries (saturation temperature)
If the device has a preheating battery, a cooling battery and a postheating battery, then a saturation temperature sensor can be mounted after the cooling battery. By this sensor, the first two batteries can be controlled, whereby the setpoint for this measurement point is lowered at a dehumidification requirement. The lowest setpoint can be set in the access level 5. This function is only possible when:
2 heating batteries and 1 cooling battery are present
a saturation temperature sensor is present
return air cascade, supply air or room cascade is set as control strategy
Setpoint Description Default
Saturation temp.
Minimum saturation temperature 14 °C
Table 14: Saturation temperature setpoint
14.2.3 Supply air limitation
The supply air temperature is always limited:
the supply air setpoint cannot exceed the limits, if the cascade control is active
no setpoint is allowed to exceed the limits, if the supply air control is active
the supply air temperature is limited by separately adjustable controller, if the return air control and room control are active
Setpoint Description Default
Min supply air temp.
Max supply air temp.
Minimum limit for the supply air setpoint
Maximum limit for the supply air setpoint
16 °C
35 °C
Table 15: Supply air temperature limits
14.2.4 Summer / winter compensation
Via the summer compensation, cooling setpoints can be raised at high outside temperatures to keep the difference between outdoor and indoor temperature low or to save cooling energy; heating setpoints are not affected.
Via the winter compensation, heating setpoints can be raised or lowered at low outdoor temperatures; cooling setpoints are not affected.
Summer compensation 1/4
Start
End
Delta
Calculated
25.0°C
30.0°C
5.0°C
0.0°C
Figure 95: Summer compensation
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Setpoint
Summer compensation
Start
End
Delta
Calculated
Winter compensation
Start
End
Delta
Calculated
Description Default
Outdoor temperature start point for shift
Outdoor temperature end point for shift
25 °C
30 °C
Shift value of the cooling setpoints at the end point 0 °C
Shift due to the current outdoor temperature … °C
Outdoor temperature start point for shift 0 °C
Outdoor temperature end point for shift -10 °C
Shift value of the cooling setpoints at the end point 0 °C
Shift due to the current outdoor temperature … °C
Table 16: Summer / winter compensation settings
14.2.5 Setpoint and control variable
At the end of the page, the currently used setpoints and the current control variable are displayed, which vary depending on the control strategy.
Temperature setpoints 1/6
Supply temp.min
16.0°C
Supply temp.max
Summer compensation
35.0°C
0.0°C
►
-----------------------------
Controlled temp.
Heat set
Cool set
20.3°C
16.0°C
35.0°C
Figure 96: Current setpoints
Setpoint
Controlled temp.
Heat set
Cool set
Description
Current control variable (return air, supply air or room temp.)
Current setpoint for recovery, heating batteries
Current setpoint for cooling batteries
Default
… °C
… °C
… °C
Table 17: Heat / cool setpoint and controlled temperature
14.2.6 Recirculation damper
The recirculation damper is not modulating, but is opened or closed depending on the heating requirement and the set base time (60min). The recirculation damper operates as the last heating
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14.3 Humidity setpoints
Depending on the execution of the AHU can be dehumidified, humidified or dehumidified and humidified; the display differs depending on the execution.
Humidity setpoints 1/7
Control mode
Humidification Eco
Humidification Com…
Dehumidificat.Eco
Dehumidificat.Comf…
Max supply
Humidifier
Return
30%
40%
70%
60%
80%
0.0%
Figure 97: Humidification / dehumidification setpoints
14.3.1 Control mode for humidification and dehumidification
Depending on the execution of the AHU, the operating mode of the control can be chosen between return air, supply air and room.
14.3.2 Return air control
Normally, the humidification and dehumidification is controlled via the return air humidity. Thus, the desired room humidity is kept within specified limits; the room humidity should be between 40% and 60%.
14.3.3 Supply air control
In pure supply air devices and if no return air sensor or room humidity sensor is present, then it is controlled via the supply air humidity; this is then kept within specified limits. Since not the room humidity is measured, the response of the room must be considered when entering the setpoints.
Depending on the application, higher humidification setpoints in winter and lower dehumidification setpoints in summer may be necessary.
14.3.4 Dehumidification with cooling battery
For dehumidification, the supply air is cooled and again heated up by the heating battery, thus resulting in a dry supply air. In the best case the AHU is equipped with 3 batteries (see also chapter
), whereby the dehumidification lowers the saturation temperature, which is an independent
control circuit for temperature control and the postheating battery again raises the supply air temperature.
The water cooling battery, compressor cooling battery or both are used.
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14.3.5 Dehumidification with recirculation damper
For the dehumidification by means of the recirculation damper, the absolute humidity of the supply air and of the exhaust air is compared.
In case of a higher supply air humidity (corresponds to the fresh air humidity in the fresh air mode), it is switched to recirculated mode as a function of the dehumidification requirement (see
for more information), in order to not increase the absolute humidity content. In case of an additional air quality control by the recirculation damper, the air quality has a higher priority.
Setpoint Description Default
Min fresh air Minimum opening positon for the fresh air damper 20%
Max fresh air Maximum opening position for the fresh air damper 100%
Table 18: Fresh air dehumidification with recirculation damper
14.3.6 Dehumidification with damper / cooling, cooling / damper
In this case the dehumidification is done by increasing the amount of recirculation air and then activating the cooling battery or exactly the opposite.
14.3.7 Setpoints
The setpoints for humidification and dehumidification are entered separately for economy and comfort mode. If no humidifier is selected, then no humidification setpoints can be entered. If dehumidification is not possible, then no dehumidification setpoints can be entered. At the same time, a maximum supply air limit for the return air humidity control can be configured. The current humidification and dehumidification request is displayed.
Setpoint Description Default
Humidification Eco
Humidification Comfort
Humidification setpoint for economy mode
Humidification setpoint for comfort mode
30 %
40 %
Dehumidification Comfort Dehumidification setpoint for comfort mode 60 %
Dehumidification Eco Dehumidification setpoint for economy mode 70 %
Max supply
Humidifier
Dehumidification
Maximum supply air humidity (limit)
Current power request for humidifier
Current dehumidification request
80 %
0.0 %
0.0 %
Table 19: Humidification / dehumidification setpoints
14.4 Air quality setpoints
The air quality is measured by an air quality sensor in the return air and is controlled by the amount of air or the recirculation damper. Sensor type and control mode are configured at commissioning and cannot be changed.
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Air quality setpoints 1/5
CO2 Eco
CO2 Comfort
1200 ppm
800 ppm
Control signal 0.00%
-----------------------------
Supply max
Return max
5000m3/h
5000m3/h
Figure 98: Air quality
14.4.1 Sensor type, control procedures
One type of sensor and one control procedure come into use, depending on the execution of the
AHU.
CO2 sensor
This sensor measures the CO
2
concentration [ppm] in the return air; the higher the concentration, the worse the air quality. As a guide for the setting of the CO
2
concentration, the following table can be used.
Air quality CO
2
concentration
Outdoor air (good quality)
Room with good air quality
~ 400 ppm
< 800 ppm
Room with medium air quality
Room with moderate air quality
Room with low air quality
800 … 1000 ppm
> 1400 ppm
1000 … 1400 ppm
Table 20: Room air quality
Recirculation damper
For the control of the air quality by means of a recirculation damper, it is possible to determine whether the air quality has priority (default setting: Yes). Depending on the requirements, the fresh air mode is active for a prolonged period (see
for the method of operation).
Setpoint Description Default
Min fresh air Minimum opening position for the fresh air damper
20%
Max fresh air Maximum opening position for the fresh air damper
100%
Table 21: Fresh air for air quality control
Fan speed
In case of good air quality, the AHU is operated with the airflow rate, speed or duct pressure specified by the operating modes economy and comfort; this setting should be as low as possible. If the
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Instruction and Operation Manual ZHK NANO air quality decreases, then the airflow rate, speed or duct pressure increases to an adjustable maximum value. This operating mode can only be used for airflow rate, speed or duct pressure control.
The air flow rate, speed or operating stage specified by the economy or comfort mode is always kept and is increased by the air quality control.
Setpoint Description Default
CO2 Eco
CO2 Comfort
Control signal
CO
2
setpoint for economy mode
CO
2
setpoint for comfort mode
1500 ppm
500 ppm
Requested fresh air amount or airflow rate 0 %
Supply max
Return max
Supply set
Return set
Maximum supply airflow rate for poor air quality
Maximum supply fan speed for poor air quality
Maximum return airflow rate for poor air quality
Maximum return fan speed for poor air quality
Current supply airflow rate / fan speed request
Current return airflow rate / fan speed request
Nominal value
100%
Nominal value
100%
… m³/h, … %
… m³/h, … %
Table 22: Air quality setpoints
14.5 Night setback
The operating mode Night setback is a special operating mode, which can be selected via the scheduler, the display or the BMS.
In the night setback mode, the rooms shall be cooled with cool outdoor air to save cooling energy the next day. The AHU is operated with the separately adjusted airflow rate, speed or duct pressure. The recovery system, all heating and cooling batteries, humidification and dehumidification are inactive.
Night setback starts according to the operating mode switch (e.g. scheduler at 0:00) when the outdoor temperature is above 12 °C, the room temperature is 3 °C above the setpoint (22 °C) and the outdoor temperature is at least 5 °C below the room temperature. Night setback will run as long as the outdoor temperature is above 12 °C, the room temperature is at least 1 °C above the setpoint
(22 °C) and the outdoor temperature is at least 1 °C below room temperature. A minimum operating period of 30 min guarantees, that it will not immediately be switched off after starting.
Several settings are set during commissioning. The room temperature setpoint and the minimum operating period, air flow rate, speed or operation stage can be set in the Night setback menu.
If no room sensor and outdoor temperature sensor are present, then the return air temperature and fresh air temperature are used. For this purpose, these are cyclically tested for 5 min every hour; if the conditions are met, then the night setback mode continues operating.
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Night setback 1/4
Room setpoint
Min run time
Supply
Rturn
22.0°C
30min
5000m3/h
5000m3/h
Figure 99: Night setback
Setpoint
Room setpoint
Min run time
Supply
Return
Table 23: Night setback setpoints
Description Default
Room temperature setpoint for night setback 22 °C
Minimum operating time, even if the conditions are no longer met
30 minutes
Supply airflow rate, supply fan speed
Return airflow rate, return fan speed
Nominal value, 60%
Nominal value, 60%
15 Operating mode / scheduler
The on / off switching and the operating mode economy or comfort are determined by a variety of sources, which have different priorities. A source with a higher priority overrides all lower prioritized sources.
HMI
BMS
Room unit
Scheduler
Request from HMI (Off, NightStb, Eco, Comfort, Auto) with with
Auto
Auto
the operating mode is determined by the BMS
Request from BMS (Off, NightStb, Eco, Comfort, Auto)
the operating mode is determined by the room unit
Request from room unit (Off, Eco, Comfort, Auto) with Auto the operating mode is determined by the scheduler
Request from scheduler (Off, NightStb, Eco, Comfort) with no entry (display -) the AHU is off
Note: the AHU can be started and stopped at the electric cabinet (operating display mounted on the electric cabinet) by setting the operating mode of the HMI.
Depending on the execution of the AHU, individual control devices / lines are not displayed; room unit and building management system are optional. Only the operating mode of the HMI and, with the expanded customer password, the building management system setting is adjustable (for test purposes and in case of failure).
The current mode is displayed next to each control device. The Operating mode line shows the resulting operating mode, which results from the various control devices and the scheduler. The
Scheduler line shows the resulting operating mode switch of the scheduler, which results from the scheduler setting.
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Operating mode/scheduler 1/19
29.07.11 13:32
Operating mode
HMI
Room unit
BMS
Schedule
Off
Off
Auto
Auto
Comfort
Figure 100 : Operating mode / scheduler
15.1 Operating modes
The AHU can be operated with different operating modes, whereby different setpoints for the fan, temperature and humidity control are active.
Off AHU is switched off
NightCool The AHU is in the night setback mode; the unit will run only if the requirements are met
Eco
Comfort
Auto
The AHU is in the economy mode
The AHU is in the comfort mode
The AHU is in the automatic mode
15.2 Scheduler
15.2.1 Weekdays
The scheduler is a week scheduler, in which up to 6 switching points separately for each day of the week can be entered. A program for exception days can be entered additionally, e.g. for events.
Each weekday can have 6 switching points, i.e. the operating mode can be changed up to 6 times a day (see examples). To avoid entering each weekday separately, settings can be copied with the copy function from Monday to the days Tuesday to Friday, from Monday to Tuesday to Sunday or from Saturday to Sunday.
Set the scheduler by selecting the corresponding weekday and confirming it with Ok ; the display shows the setting of the weekday. The current operating mode, whether the day is active and 12 lines for the 6 switching points are displayed. The input always starts with switching point 1, for which the time and the desired operating mode can be entered. Unnecessary switching points are deleted by entering ":" for the time and "-" for the operation mode.
Montay 1/14
Present value
Day schedule
1: Time
Mode
2: Time
Mode
3: Time
Comfort
Passive
07:00
Comfort
18:00
Off
": "
Figure 101: Scheduler - weekday
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Attention:
If only an entry for switching on and none for switching off is entered, then the AHU runs till midnight and then with the settings of the next day.
It must be entered at least one switching point per day; if all switching points are deleted, then the default setting is entered automatically (7:00 Comfort, 18:00 Off)
If the AHU should remain off for a day, then at least one switching point for off has to be entered; it is better not to change the times and to set only the modes to Off .
Setting for Mo..Fr
Description Default
1: Time 1st entry– time 07:00
Mode
2: Time
Mode
3: Time
Mode
4: Time
Mode
5: Time
Mode
6: Time
Mode
1st entry – operating mode
2nd entry – time
2nd entry – operating mode
3rd entry – time
3rd entry – operating mode
4th entry – time
4th entry – operating mode
5th entry – time
5th entry – opterating mode
6th entry – time
6th entry – operating mode
": "
-
": "
-
Comfort
18:00
Off
": "
-
": "
-
Table 24: Scheduler settings (day)
Saturday and Sunday has the default setting off (7:00 operating mode „Off“, 18:00 „Off“)
.
15.2.2 Exception day(s)
The scheduler also includes an exception calendar, which allows you to use a special program for events, without reprogramming the scheduler for individual days. This program can be entered in advance. The setting when the exception is valid, is made in the lines Period:Start and Period:End .
The following settings are possible:
only one day enter a date in the line Period:Start , enter nothing in the line Period:End
always the same weekday select a weekday in the line Period:Start , enter nothing in the line Period:End
always the same weekday for a month select a weekday and a month in the line Period:Start ; if this exception is valid for only one month, then enter nothing in the line Period:End ; if this exception is valid for two or more month, then enter the same weekday and the last month in the line Period:End
all odd / even months select 135 in the months field for all odd months or 246 for all even months
last day of the month select le in the days field
Several combinations are possible, whereby all the settings are always AND linked, i.e. the exception program is executed when all settings are fulfilled.
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Example: If the AHU of a gym should run in March and April every Thursday evening from 20:00 to
22:00, then the setting has to be performed as followed:
Setting Description Default
In the line Exception
1: Time
Mode
1st entry – time
1st entry – operating mode
20:00
Comfort
2: Time
Mode
2nd entry – time
2nd entry – operating mode
In the lines Period:Start and Period:End
Period:Start Start date for the exception program
Period:End End date for the exception program
22:00
Off
Th, ".Mar.""
Th, ".Apr.""
Table 25: Scheduler setting (exception program)
15.2.3 Calendar fix off (AHU fix off)
In addition to the exception program of the scheduler, a calendar is available to switch off the AHU for some time. Overall, 10 days, periods (start and end date), weekdays etc. can be programmed.
With this function it is possible to program holiday times in advance.
In the screen of the operating modes, the calendar is located in the last line and shows the current state; if the state is active, then the AHU is switched off by this calendar.
Calendar off 1/41
Present value
Choice 1
Passive
-
-(Start)date
-End date
-Week day
Choice 2
",".".""
",".".""
",", "
-
-(Start)date ",".".""
Figure 102: Calendar fix off
For each of these 10 programs adjust the settings in the line Choice ..., (Start)date , End date and
Weekday ; the settings match the settings in Period:Start and Period:End of the exception program of the scheduler.
Setting Description Default
Choice 1
-(Start)date
-End date
1st entry – activation and type of entry
1st entry - day (choice = date)
1st entry – first day (choice = range)
1st entry – last day (choice = range)
-
", ". ".""
", ". ".""
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Setting
-Weekday
Choice 2
-(Start)date
-End date
-Weekday
…
Choice 10
-(Start)date
-End date
-Weekday
Setting choice
-
Date
Range
WDay
Description
1st entry - weekday (choice = WDay)
2nd entry – activation and type of entry
2nd entry - day (choice = date)
2nd entry – first day (choice = range)
2nd entry – last day (choice = range)
2nd entry - weekday (choice = WDay)
…
10th entry - activation and type of entry
10th entry - day (choice = date)
10th entry – first day (choice = range)
10th entry – last day (choice = range)
10th entry - weekday (choice = WDay)
-
Default
", ", "
", ". ".""
", ". ".""
", ", "
…
-
", ". ".""
Entry not active
Usage of the start date
Usage of the start and end date, date range
Usage of the weekday
", ". ".""
", ", "
Table 26: Calendar setting "AHU off"
15.2.4 Date / time setting
Select the first line (date, time) and press Ok to set the date and the time; enter now for each field
(day, month, year, hour, ..) the correct value and confirm with Ok .
Line Description Default display
Date, time
Operating mode
HMI
Current date, time
Current operating mode
Operating mode from the operating display /
AHU
Off
Room unit
BMS
Scheduler
Monday
Tuesday
Operating mode from the room unit
Operating mode from the building management system
Current operating mode from the scheduler
Set the scheduler for Monday
Set the scheduler for Tuesday
Wednesday
Thursday
Set the scheduler for Wednesday
Set the scheduler for Thursday
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Line
Friday
Saturday
Sunday
Copy...
Exception
Period:Start
Period:End
Calendar fix off
Description
Set the scheduler for Friday
Set the scheduler for Saturday
Set the calendar for AHU fix off
Table 27: Settings display page operating mode / scheduler
Default display
Set the scheduler for Sunday
Copy the Scheduler (Mo → Tu..Fr, Mo →
Tu..Su, Sa → Su)
-
Set the exception program of the scheduler -
Set the start date of the exception period ", ". ".""
Set the end date of the exception period ", ". ".""
Passive
16 Room unit
If a room unit is connected, then depending on the enabling state the operating mode can be changed, a temperature offset can be entered and the alarms can be acknowledged. If a room temperature sensor is mounted additionally, then the room unit displays the temperature of the room sensor and not of its own sensor.
The room unit displays additional information about the AHU:
Operating mode ; mode (upper right button) and power (upper left button) mode changeover via mode button, off / on via power button
Overtime / party ; house button on via short pressure, off via long pressure (2s) time setting in 30 minutes steps via keys +/- (0:30 .. 9:30)
Fan offset , fan button on: press short, Off: press longer (2s) offset adjustable with 12 steps by using the buttons +/-
Temperature offset by pressing the button „+“ or „
-
„ offset sett ing with the button „+“ and „
-
„
Alarm acknowledge with the button “Ok”
I indicated symbols
- Room temperature, clock
- Leaf (heat recovery active)
- Heating symbol (heating active), cooling symbol/snow (cooling active)
- Water drop (dehumidification active)
- Alarm symbol (blinking = not acknowledged alarm, lights = active alarm)
- Fans bar (offset active)
- Each 30s temperature offset and overtime rest time becomes visible
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Alarm
Figure 103: Room unit
17 Alarm state
The display page does not display the individual alarms, but which alarm classes are active. Individual alarms are displayed on the alarm display (
Alarm state 1/8
AHU: Danger
-
-
DX:
Maintain(C)
-
Alarm(A)
-
Figure 104: Active alarm classes
4 alarm classes are used for the AHU and the compressor unit.
Alarm class Description
Danger
Alarm(A)
Danger for the AHU; AHU stops
Serious alarm with priority A (high)
Warning(B)
Maintain(C)
Warning message with priority B (low)
Maintenance message with priority C; e.g. dirty filter
Table 28: Alarm classes
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Alarms and warnings are provided as a potential-free contact via the signal module. Alarms of alarm class Danger and Alarm(A) are reported at the alarm contact, alarms of the alarm class
Warning(B) and Maintain(C) are reported as a warning.
18 Password handling
The login and logout as well as the change of passwords are performed via the password handling.
The lines Log in , Log out , and Change user password appear only after the login with the user password 1000 (level 6) or 1001 (level 5); without login, the password entry appears immediately.
The setting of values is only possible after login. The login is indicated by a key symbol in the top left corner. A login is possible from any menu by long pressing the Ok -button.
Passworf handling 1/3
Log in
Log out
Change user password
Figure 105: Passord handling
Attention: If the changed password is forgotten, then this only can be reset by the service engineer!
Setting Description Default
Log in
Log out
Login to higher access level, e.g. level 5
Logout, the display shows the main / start page
Change user password Change user password for access level 6
The password for access level 5 is greater by 1 and cannot be changed
Table 29: Password handling
19 Language selection
The language selection is possible without login. English, Italian, German and French can be selected. The selected language does not change even after a power failure.
20 Application info
By pressing the Info -button, the display shows the main / start page; by pressing the Info -button you can switch from the main / start page to the application info page, which provides information about the software.
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Application info 1/6
Euroclima
Via San Lorenzo 36
39031 Brunico
ETAMATIC
V4.00.00
(c)08.2016
Figure 106: Application info
21 Alarm display
21.1 General
If a new alarm occurs, then the Alarm -button starts flashing. Alarms require an acknowledgement, i.e. the alarm is consciously perceived by the user and thus only after the acknowledgment the alarm is no longer considered actively for the control system (if it is corrected now). For example, in case of fire alarm, the AHU is switched off and the alarm message fire alarm is displayed. After the fire alarm has been corrected at the fire alarm control panel, the AHU does not start anyway, but only after the alarm has been acknowledged.
The Alarm -button shows the state of the alarms and is used to call up the alarm pages.
Alarm-button Description
Off
Red flashing
Red
No alarm is active
Alarms are active
A new alarm occurred; a unacknowledged alarm is active
Table 30: Alarm-button - display
It is also possible to set an alarm so, that it is acknowledged itself. In this case, the Alarm -button flashes for a few seconds and then switches itself to continuous light. Once the alarm is corrected, the Alarm -button will turn off. To return to the example above, this can be used for the fire alarm off when the AHU is not easily accessible. This setting can only be performed by a service engineer.
By pressing the Alarm -button, you can always call up the alarm menu, which consists of 4 pages.
Press 1 time
Details of the last alarm (or the first alarm of those, which occurred the last)
Press 2 times
Alarm list with the possibility of acknowledgment
Press 3 times
Alarm history (alarm came in, alarm went, ...)
Press 4 times
Setting of the sort order for the alarm list / alarm history, delete alarm list / alarm history
A priority / alarm class is displayed for each alarm, which can be changed by a service engineer.
With this priority is signalized, whether it is a very critical or non-critical event.
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Danger
It is a very critical alarm, which requires an immediate switchoff of the AHU
Alarm / A
Critical alarm; it may lead to the switchoff of the AHU, or the AHU may continue to run. The affected component of the AHU is usually not fully functional (e.g. recovery alarm).
Warning / B
Alarm with low priority; the AHU is not switched off. Shows a fault, which should be corrected to ensure a reliable operation of the AHU (e.g. sensor failure).
Maintain / C
Warning message; the AHU is not switched off. Usually shows no failure, but only the need to check a component of the AHU (e.g. dirty filter)
21.2 Alarm list, alarm list detail
The alarm list displays all unacknowledged or still active alarms. The alarms can be acknowledged via the first line (login is necessary).
By selecting another line details can be called up, which show the priority of the alarm, date / time of the occurrence.
Alarm list 1/4
Acknowledge Passive 19
+ Compressor 1: FeedBack
+ Return humidity: UnderRange
+ Return temp.: No Sensor
►
►
►
Figure 107: Alarmlist
Alarm list detail 1/3
+ Return temp.: NoSensor
1
29.07.2011
High(A)
08:53:11
Figure 108: Alarm list detail
Important: Try to perform the following points for troubleshooting:
Note alarm(s) and correct the cause of the failure(s); further helpful information is in
Acknowledge alarm(s) (via the line Acknowledge in the alarm list)
If the AHU does not start or the fault occurs repeatedly, then the cause of the fault has to be identified more accurately (e.g. availability of warm water in case of frost alarm, in case of fire alarm, whether this is really corrected or all fire dampers are open)
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If you cannot find the cause or you are unfamiliar with the meaning of the message, contact your AHU fitter, service engineer or call the EUROCLIMA hotline (see the title page of this document).
21.3 Alarm history
All alarms are shown in this list, also the already corrected. So this list provides a subsequent monitoring of the alarm history.
AlarmHistory 1/7
Acknowledge Passive 19
- Compressor 1: FeedBack
- Return humidity: UnderRange
- Return temp.: No Sensor
+ Compressor 1: FeedBack
+ Return humidity: UnderRange
►
►
►
►
►
►
+Return temp.: NoSensor
Figure 109: Alarm history
Again, the detail page can be called up and thus the occurrence and the acknowledgement of an alarm can be looked up in detail (priority, date, time).
21.4 Alarm lists configuration
Via the last alarm page, the alarm lists can be configured according to the user’s needs. It is possible to sort according to 2 criteria and to display in descending / ascending order. Also, it is possible to clear the list completely (reset). The settings are performed separately for the alarm list and the alarm history.
Alarm list/-hist settings 1/10
Alarm list
Reset
Sort order 1
Sort order 2
Descending order
Alarm history
Reset
Time
Time
Passive
Figure 110: Alarm lists configuration
Setting
Alarm list:
Reset
Sort order 1
Sort order 2
Descending order
Description
Clear the entire alarm list
1st sort order criteria
2nd sort order criteria
Last occurred alarm on the top of the list
Default
Time
Time
Passive
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Setting
Alarm history:
Reset
Sort order 1
Sort order 2
Descending order
Description
Clear the entire alarm list
1st sort order criteria
2nd sort order criteria
Last occurred alarm on the top of the list
Table 31: Alarm lists configuration
Sort order
Time
ID
Class
State
Description
Sort by date / time
Sort by alarm ID
Sort by alarm class Danger, High(A), Low(B) or Warning (C)
Sort by state (error type)
Default
Table 32: Sort order configuration for the alarm lists
Default
Time
Time
Active
21.5 Alarm index
The following table shows possible error messages, which consist of a text for the part of the AHU and a text for the alarm (alarm type) itself.
Message Description Alarm class
Outdoor temp.
Low(B)
Supply temp.
The outdoor temperature sensor is broken
Call the service engineer for the replacement of the sensor
The supply air temperature sensor is broken;
AHU stops
Call the service engineer for the replacement of the sensor
Danger
Return temp.
Danger
Saturation temp.
Room temp.
The return air temperature sensor is broken;
AHU stops
Call the service engineer for the replacement of the sensor
The saturation temperature sensor is broken
Call the service engineer for the replacement of the sensor
The room temperature sensor is broken
Call the service engineer for the replacement of the sensor
High(A)
High(A)
Supply humidity The supply air humidity sensor is broken
Call the service engineer for the replacement of the sensor
Low(B)
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Message
Return humidity
Room humidity
Supply airflow 1
Description
The return air humidity sensor is broken
Call the service engineer for the replacement of the sensor
The room humidity sensor is broken
Call the service engineer for the replacement of the sensor
The pressure sensor for supply fan 1 is broken; AHU stops
Call the service engineer for the replacement of the sensor
Return airflow 1
Recovery alarm
Supply duct press.
Return duct press.
The pressure sensor for return fan 1 is broken; AHU stops
Call the service engineer for the replacement of the sensor
The supply air duct pressure sensor is broken; AHU stops
Call the service engineer for the replacement of the sensor
The return air duct pressure sensor is broken; AHU stops
Call the service engineer for the replacement of the sensor
Alarm message from the heat recovery system (ACCU, ROT)
Check the heat recovery and the power supply
Call the service engineer
Recovery pressure
Freeze protection recovery Freeze protection alarm from the heat recovery system
Check the outdoor and indoor temperature
Call the service engineer when this message occurs repeatedly
Freeze protection
Overpressure message at the plate heat exchanger
Check the dampers
Call the service engineer when this message occurs repeatedly
Freeze protection alarm from fresh air heating battery
Check the hot water supply, valves and pumps
Call the service engineer when this message occurs repeatedly
Alarm class
Low(B)
Low(B)
Danger
Danger
Danger
Danger
High(A)
Danger
Low(B)
Danger
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Message
Electric battery
Humidifier
Controller
Supply filter 1: dirty
Return filter 1: dirty
AHU module 1 (955)
Supply fan: feedback
Return fan: feedback
Description
Alarm message from the electric heating battery
Check the power supply (electric protection) and the security thermostat
Call the service engineer when this message occurs repeatedly
Alarm message from the humidifier
Read the failure message on the humidifier
Call the service engineer when this message occurs repeatedly
Supply air filter 1 is dirty; clean / replace
Check, clean or replace the filter
Return air filter 1 is dirty; clean / replace
Check, clean or replace the filter
Hardware error message from the controller
Call the service engineer
Hardware error message from the AHU expansion module 1
Call the service engineer
No feedback from the supply fan inverter; check the inverter and read failure message on the Inverter
No feedback from the return fan inverter; check the inverter and read failure message on the Inverter
Alarm class
High(A)
High(A)
Warning(C)
Warning(C)
Danger
Danger
Danger
Danger
Table 33: Alarm messages – AHU controller
Alarm type Description
NoSensor
OverRange
UnderRange
No sensor is connected / recognized
Measured value is greater than the allowed value; > 10V, > 20mA
Measured value is lower than the allowed value; < 0V, < 4mA
OpenLoop
ShortedLoop
Other
ConfigErr
Measuring circuit is open
Measuring circuit is shorted
Not defined error, communication error
Configuration error, measured value completely outside of allowed values; << 0 V
MultiFault
Fault, Alarm
Dirty
HighLimit
Multiple faults on inputs with multiple states; e.g. operating mode
Alarm message from a digital input, contact, freeze protection, feedback
Dirty filter message from a filter with pressure monitoring
Measured value greater than the high limit; e.g. filter pressure too high
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Alarm type
LowLimit
Description
Measured value lower than the low limit; e.g. temperature too low
Table 34: Alarm type
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Data point list
NANO V0.06
April 2018
Hotline
+39 335 1334212
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22 Introduction and configuration
The interfaces will be set up by the service technician and afterwards they will be ready for operation. Subsequently, the configuration of the interfaces is described, in order to change the interface parameters.
22.1 Access levels
The device has 5 access levels; each level has its own password. A lower level has access to all settings and menus of its own and of the higher levels. The lower the level, the more settings are available.
A lower access level can change the passwords of all other levels.
Access level
Description Keysymbol
Passwor d
4 Service level; access to all settings for service and maintenance except some configurations; password changeable
2 keys 6975
5 Special user level; password automatically generated out of level 6
(password level 6 +1)
6 User level; password changeable
1 key
1 key
1001
1000
Table 35: Access levels
The password can be entered from any menu by long pressing the Ok -button; alternatively, the menu item All Settings
→
Password handling can be selected.
22.2 Configuration of communication interfaces
The communication with a higher-level control system is processed through various communication modules. Up to 3 communication modules can be used simultaneously. Depending on the used communication module, a reset is required after installation to activate the module in the configuration menu (several resets are necessary while replacing modules); the module type appears automatically, so no need to configure.
After login with the password 6975 it`s possible to change settings for Bacnet IP, Bacnet MSTP, Modbus RTU, LON as following: All settings
=>Configuration=>Communication modules=>... .For Modbus IP: All settings=> Configuration=> Controller communication=>IP-Config=>... .
Protocol Module Description
Modbus RTU
BACnet MS/TP
BACnet IP
POL902
POL904
POL908
Communication interface for Modbus RTU
Communication interface for BACnet IP
Communication interface for BACnet MS/TP
LON POL906 Communication interface for Lonworks
Table 36: Communication protocols
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22.2.1 Modbus RTU
This module provides two communication ports (channel 0, channel 1), in which only channel 0 can be used for communication to the superior system. Channel 1 is reserved for internal applications.
Parameter Value Description
State
Comm failure
Display hardware state of the module
Display communication error
Channel 0:
Slave
Passive No communication error
Active Communication error
Configuration of channel 0
Display communication state with the superior system
Passive No communication
Active Communication
Slave address
Baud rate
Stop bits
Parity
Slave address setting [1]
Number of stop bits [Two]
One 1 stop bit
Two 2 stop bits
Parity setting [None]
None
Even
Odd
No parity
Even parity
Odd parity
Baud rate setting [9600]; 1200, 2400, 4800, 9600, 19200 Baud
Response timeout Response timeout setting [5 s]
Termination Enable 120Ω termination resistor [Passive]
Passive No termination
Active Termination (120Ω)
Channel 1:
Enable
Slave
Configuration of channel 1
Passive No communication
Active Communication
Enable communication for channel 1 [Passive]
Display communication state with the superior system
Slave address
Baud rate
Stop bits
Parity
Slave address setting [2]
Number of stop bits [Two]
One 1 stop bit
Two 2 stop bits
Parity setting [None]
None No parity
Baud rate setting [9600]; 1200, 2400, 4800, 9600, 19200 Baud
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Parameter Value
Even
Odd
Description
Even parity
Odd parity
Response timeout Response timeout setting [5 s]
Termination Enable 120Ω termination resistor [Passive]
Passive No termination
Active Termination (120Ω)
General Module configuration/info
Software version Display software version
Device ID
Module
Use default
Display device ID
Active
Display module information
Set back to the default settings
Table 37: Modbus RTU configuration
22.2.2 BACnet MS/TP
Parameter
State
Comm failure
BACnet:
Device ID
Address
Imperial unit system
Device name
Value Description
Display hardware state of the module
Display communication error
Passive No communication error
Active Communication error
Configuration of the BACnet side
Device name setting [POL904_......]
Device ID setting [4194303]
BACnet MS/TP address setting [18]
Use of imperial unit system [No]
No Metric unit system
Yes Imperial unit system (inch, °F, …)
Enable Unicode [Passive]
Description language setting for data point list [English]; do not change it!!
Unicode
Description language
Security level Security level setting [0]
Alarm server ID Alarm server ID setting [1]
Alarm device ID1 Alarm device ID1 setting [0]
Alarm device ID2 Alarm device ID2 setting [0]
Comm mapping Used mapping setting [16384 = COM1]; do not change it!!
Interface: Configuration of the physical interface
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Parameter
Termination
Baud rate
Value Description
Enable the termination resistor of the bus line [Passive]
Baud rate setting [76800]
MX info frame
Max master
MX info frame setting [1]
Max master setting [18]
General: Module configuration/info
Software version Display software version
Device ID Display device ID
Module
Diagnostics
Use default
Display module information
Display diagnostic information from the module
Active Set back to the default settings
Table 38: BACnet MS/TP configuration
22.2.3 BACnet IP
Parameter
State
Comm failure
BACnet:
Device name
Device ID
Port
Imperial unit system
Value Description
Display hardware state of the module
Display communication error
Passive No communication error
Active Communikation error
Configuration of the BACnet side
Device name setting [POL908_......]
Device ID setting [4194303]
Communication port setting [47808]
Use of imperial unit system [Passive]
Unicode
Description language
Security level
Passive Metric unit system
Active Imperial unit system (inch, °F, …)
Enable Unicode [Passive]
Security level setting [0]
Description language setting for data point list [English]; do not change it!!
Alarm server ID Alarm server ID setting [1]
Alarm device ID1 Alarm device ID1 setting [0]
Alarm device ID2 Alarm device ID2 setting [0]
Alarm device ID3 Alarm device ID3 setting [0]
Comm mapping Used mapping setting [16384 = COM1]; do not change it!!
TCP/IP: IP-interface configuration
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Parameter
DHCP
→
WINS name
IP
→
Mask
Value Description
Enable DHCP [Active]
Display effective DHCP state
Display WINS name [POL908_......]
IP address setting [127.0.0.1]
NOTE: The IP address must be entered in the form xxx.xxx.xxx.xxx, i.e.
3 digits per digit group !!
Display effective IP address
IP mask setting [255.255.255.0]
NOTE: The IP address must be entered in the form xxx.xxx.xxx.xxx, i.e.
3 digits per digit group !!
Display effective IP mask →
Gateway
→
Save settings
Gateway address setting [127.0.0.1]
NOTE: The IP address must be entered in the form xxx.xxx.xxx.xxx, i.e.
3 digits per digit group !!
Display effective gateway address
General: Module configuration/info
Software version Display software version
Save IP address, IP mask and gateway settings before reset
Device ID
Module
Diagnostics
Use default
Display device ID
Active
Display module information
Display diagnostic information from the module
Set back to the default settings
Table 39: BACnet IP configuration
22.2.4 LON
Parameter
State
Comm failure
Location
Application
Neuron ID
Send heartbeat
Value Description
Display hardware state of the module
Display communication error
Passive No communication error
Active Communication error
Display location [-]
Display application
Display neuron ID
Transmission time interval setting [2700 s]
Receive heartbeat Reception time interval setting [3600 s]
Min send interval Minimum transmission time interval [5 s]
Service pin Release/actuate the service pin
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Parameter Value Description
General: Module configuration/info
Software version Display software version
Device ID
Module
Use default
Display device ID
Display module information
Active Set back to the default settings
Table 40: LON configuration
22.2.5 Modbus RTU/ IP controller interfaces
Directly on controller there are 2 communication ports availabe (1 for IP and 1 for RTU). The IP interface you can use for Web-Application (within your network), where you can monitor the same situation like on the local HMI display.
Modbus RTU (on board) has no galvanic isolation and is just to use for building management; if power measurement will be done over IP, connection to BMS is not possible!
The configuration is carried out in the menu Configuration
→
Communication controller .
Parameter Wert Beschreibung
IP-Config: (TCP-Port: 502)
IP
Mask
Display IP address of controller
Display subnet mask
Gateway
DHCP
Name
Display gateway address
Display DHCP status (automatic reference of IP address from a DHCP server)
Controller name
MAC Display MAC address
Change settings Submenu IP configuration
IP
Mask
Gateway
Config of IP address of controller
Config of subnet mask (controller)
Config of gateway address (controller)
DHCP
100 Mbit
Config DHCP [Active]
Passive Manual address config
Active Automatic address config by DHCP server
Switch-over interface speed 10/100Mbps [Active]
Link
User name
Passive Speed 10Mbps
Active Speed 100Mbps
Activate IP interface [Active]
Passive Interface deactivated (no communication)
Active Interface activated
User name for WebVisu
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Parameter
Password
Modbus:
Wert Beschreibung
Password for WebVisu
Modbus RTU:
State Displays hardware status of interface
Slave address Adjustment slave address [1]
Baudrate
Parity
Adjustment baudrate [9600]; 1200, 2400, 4800, 9600, 19200, 38400 Baud
Parity setpoint [None]
Stop bits
None
Even
No parity
Even parity
Odd Odd parity
Adjustment quantity of stop bits [1]
1
2
1 Stop bit
2 Stop bit
Response delay Adjustment delay between master request and slave respond [0ms]
Termination Activate 120Ω end resistion [Passive]
Off
On
No termination
Bus line terminated (120Ω)
Modbus TCP/IP:
State Displays hardware status of interface
Table 41: Modbus RTU/IP on controller
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23 Data points AHU
Description
Measured values:
Outdoor- / fresh air temperature
Supply air temperature
Supply air humidity
Return air temperature
Return air humidity
Room temperature
Room unit
Saturation temperature
Return air quality CO2
Supply airflow rate
Return airflow rate
Supply air duct pressure
Return air duct pressure
Actual outdoor enthalpy
Actual supply enthalpy
Actual return enthalpy
Actual room enthalpy
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R/W
R
R
R
R
R
R
R
R
R32
R32
R
R
R
R
R
R
Unit Modbu s
0,1 °C
0,1 °C
0,1 %
0,1 °C
0,1 %
I1
I2
I6
I3
I7
0,1 °C I22
0,1 °C ppm m³/h m³/h
Pa
Pa I9
0.1
kJ/kg I23
0.1
kJ/kg I24
0.1
kJ/kg I25
0.1kJ/kg I27
I4
I16
I17
I19
I8
BACnet
OutDoorTemp
SupplyTemp
SupplyHumidity
ReturnTemp
ReturnHumidity
RoomTemp
SaturationTemp
ReturnAirQuality
SupplyFlow
ReturnFlow
SupplyDuctPressure
ReturnDuctPressure
Act_OutEnth
Act_SuEnth
Act_EhEnth
Act_RoomEnth
LON nvoTemp01 nvoTemp02 nvoHum00 [%] nvoTemp03 nvoHum01 [%] nvoTemp06 nvoTemp04 nvoPpm00 nvoFlow00 [l/s] nvoFlow01 [l/s]
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Description
Operating mode:
Operating mode from HMI
0=Off, 1=Night Setback, 2=Eco, 3=Comfort, 4=Auto
Operating mode from room unit
0=Off, 2=Eco, 3=Comfort, 4=Auto
Operating mode from BMS
0=Off, 1=Night Setback, 2=Eco, 3=Comfort, 4=Auto
Operation mode from hardware contact
0=Auto, 1=Eco, 2=Comfort
Current operating mode
0=Off, 1=Night Setback, 2=Eco, 3=Comfort
Current AHU state / operating mode source
0=No request/off, 1=Start, 2=Configuration changed,
3=Command from HMI, 4=Command from BMS,
5=Command from room unit, 6=Command from scheduler
Operating mode from scheduler
0=-/no request, 1=Off, 2=Night Setback, 3=Eco, 4=Comfort
Winter/Summer-Switching
0=-, 1=Winter, 2=Summer
Ventilatorregelung:
Smoke fan mode
0=Supply/Return, 1=Supply, 2=Return
Fireman fan mode
0=Supply/Return, 1=Supply, 2=Return
Fan start delay (open dampers)
R
R
R/W
R/W
R/W
R/W
R/W
R
R
R/W
R
R
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Unit Modbu s
0..4
H1
0..4
0..4
0..2
H2
H3
H4
0..3
H5
0..6
H6
0..4
0..2
0..2
0..2
0.1
s
H7
H224
H83
H84
H88
BACnet
Opmode_HMI
Opmode_RoomUnit
Set_Opmode_BMS
Opmode_HWcontact
Opmode_act
Opmode_Unitstate
Opmode_Scheduler
Set_BMS_WinSum
Set_SmokeFanMode
Set_FiremanFanMode
Set_DmpOpenDelay
LON nviOpMode nvoOpMode
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Description
Fan shut down delay electric battery
Supply speed smoke fan
Supply speed fireman fan
Return speed smoke fan
Return speed fireman fan
Supply fan request value
Return fan request value
Supply fan request stage
0=-, 1=Off, 2=Stage 1, 3=Stage 2, 4=Stage 3
Return fan request stage
0=-, 1=Off, 2=Stage 1, 3=Stage 2, 4=Stage 3
Fan control with air flow control:
Supply airflow rate for Eco mode (1)
Supply airflow rate for Comfort mode (1)
Supply airflow rate for Night Setback mode (1)
Return airflow rate for Eco mode (1)
Return airflow rate for Comfort mode (1)
Return airflow rate for Night Setback mode (1)
Maximum supply airflow rate from air quality control (1)
Maximum return airflow rate from air quality control (1)
Maximum supply airflow rate from dehumidification (1)
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R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R32/W32
R32/W32
R32/W32
R32/W32
R32/W32
R32/W32
R32/W32
R32/W32
R32/W32
0..4
m³/h m³/h m³/h m³/h m³/h m³/h m³/h m³/h m³/h
Instruction and Operation Manual ZHK NANO
Unit Modbu s
0.1
s H89
0.1
% H90
0.1
% H91
0.1
% H109
0.1
% H110
0.1
% H34
0.1
% H35
0..4
H36
BACnet
Set_FanShutDownDelay
Set_SupplySpeedSmoke
Set_SupplySpeedFire
Set_ReturnSpeedSmoke
Set_ReturnSpeedFire
SupplyFanSpeed
ReturnFanSpeed
SupplyFanStage
LON
H37 ReturnFanStage
H10
H12
H18
H14
H16
Set_SupplyFlowEco
Set_SupplyFlowCmf
Set_SupplyFlowNht
Set_ReturnFlowEco
Set_ReturnFlowCmf
H20
H22
Set_ReturnFlowNht
Set_SupplyFlowQAirMax
H24 Set_ReturnFlowQAirMax
H30 Set_SupplyFlowDeHumMax nviPress_Flow00 nviPress_Flow01 nviPress_Flow04 nviPress_Flow02 nviPress_Flow03 nviPress_Flow05
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Description
Maximum return airflow rate from dehumidification (1)
Supply airflow rate – request from air quality control (1)
Return airflow rate – request from air quality control (1)
Supply airflow rate – request from dehumidification (1)
Return airflow rate – request from dehumidification (1)
Supply airflow rate – current setpoint (1)
Return airflow rate – current setpoint (1)
Fan control with speed control:
Supply fan speed for Eco mode (2)
Supply fan speed for Comfort mode (2)
Supply fan speed for Night Setback mode (2)
Return fan speed for Eco mode (2)
Return fan speed for Comfort mode (2)
Return fan speed for Night Setback mode (2)
Maximum supply fan speed from air quality control (2)
Maximum return fan speed from air quality control (2)
Maximum supply fan speed from dehumidification (2)
Maximum return fan speed from dehumidification (2)
Supply fan speed – request from air quality control (2)
Return fan speed – request from air quality control (2)
Supply fan speed – request from dehumidification (2)
R/W
R32/W32
R32
R32
R32
R32
R32
R32
R/W
R/W
R/W
R/W
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
Unit Modbu s m³/h
BACnet
H32 Set_ReturnFlowDeHumMax m³/h H106 m³/h H101
SupplyFlowQAir
RetunFlowQAir m³/h H103 m³/h H92 m³/h m³/h
H26
H28
SupplyFlowDeHum
RetunFlowDeHum
SupplyFlowSet
ReturnFlowSet
0,1 % H10
0,1 % H12
0,1 % H18
0,1 % H14
0,1 % H16
0,1 % H20
Set_SupplySpeedEco
Set_SupplySpeedCmf
Set_SupplySpeedNht
Set_ReturnSpeedEco
Set_ReturnSpeedCmf
Set_ReturnSpeedNht
0,1 % H22
0,1 % H24
Set_SupplySpeedQAirMax
Set_ReturnSpeedQAirMax
0,1 % H30 Set_SupplySpeedDeHumMax
0,1 % H32 Set_ReturnSpeedDeHumMax
0,1 % H100 SupplySpeedQAir
0,1 % H111
0,1 % H98
ReturnSpeedQAir
SupplySpeedDeHum
V09-18.1
LON
101 / 113
Description
Return fan speed – request from dehumidification (2)
Supply fan speed – current set point (2)
Return fan speed – current set point (2)
Fan control with duct pressure control:
Supply duct pressure for Eco mode (3)
Supply duct pressure for Comfort mode (3)
Supply duct pressure for Night Setback mode (3)
Return air duct pressure for Eco mode (3)
Return duct pressure for Comfort mode (3)
Return duct pressure for Night Setback mode (3)
Maximum duct pressure from air quality control (3)
Maximum return duct pressure from air quality control (3)
Maximum supply duct pressure from dehumidification (3)
Maximum return duct pressure from dehumidification (3)
Supply duct pressure – request from air quality control (3)
Return duct pressure – request from air quality control (3)
Supply duct pressure – request from dehumidification (3)
Return duct pressure – request from dehumidification (3)
Supply duct pressure – current setpoint (3)
Return duct pressure – current setpoint (3)
102 / 113
R/W
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
Instruction and Operation Manual ZHK NANO
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Pa
Unit Modbu s
0,1 % H94
0,1 % H26
0,1 % H28
BACnet
ReturnSpeedDeHum
SupplySpeedSet
ReturnSpeedSet
H10
H12
H18
H14
H16
H20
Set_SupplyPressEco
Set_SupplyPressCmf
Set_SupplyPressNht
Set_ReturnPressEco
Set_ReturnPressCmf
Set_ReturnPressNht
H22
H24
Set_SupplyPressQAirMax
Set_ReturnPressQAirMax
H30 Set_SupplyPressDeHumMax
H32 Set_ReturnPressDeHumMax
H97
H108
H99
H96
H26
H28
SupplyPressQAir
RetunPressQAir
RetunPressDeHum
SupplyPressSet
ReturnPressSet
SupplyPressDeHum
LON nviPress_Flow00 nviPress_Flow01 nviPress_Flow04 nviPress_Flow02 nviPress_Flow03 nviPress_Flow05
V09-18.1
Instruction and operation manual ZHK NANO
Description
Temperature control:
Temperature control mode
0=Return air/supply air cascade, 1=Constant supply air,
2=Return air, 3=Room/supply air cascade, 4=Room
Minimum supply air temperature
Maximum supply air temperature
Saturation temperature setpoint (low limit)
Heating temperature setpoint for Eco mode
Heating temperature setpoint for Comfort mode
Cooling temperature setpoint for Eco mode
Cooling temperature setpoint for Comfort mode
Night Setback setpoint (Return air or room temperature)
Release temperature Night cooling (Release=Outdoortemp.> value)
Summer compensation – fresh air temperature startpoint
Summer compensation – fresh air temperature endpoint
Summer compensation – offset at endpoint
Summer compensation – current offset
Winter compensation – fresh air temperature startpoint
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
Unit Modbu s
0..4
H40
0,1 °C H41
0,1 °C H42
0,1 °C H43
0,1 °C H45
0,1 °C H46
0,1 °C H47
0,1 °C H48
0,1 °C H59
0,1 °C H112
0,1 °C H50
0,1 °C H51
0,1 °C H52
0,1 °C H53
0,1 °C H55
BACnet
Set_TempCtrlMode
Set_MinSupplyTemp
Set_MaxSupplyTemp
Set_SatTemp
Set_HeatEco
Set_HeatCmf
Set_CoolEco
Set_CoolCmf
Set_NightPurge
Set_MinOutTempNight
Set_SumCompStart
Set_SumCompEnd
Set_SumCompDelta
SumCompVal
Set_WinCompStart
LON nviTemps
{standby_cool} nviTemps
(standby_heat} nviTemps
{unoccupied_heat} nviTemps
{occupied_heat} nviTemps
{unoccupied_cool} nviTemps
{occupied_cool} nvoTemp05
V09-18.1 103 / 113
Description
Winter compensation – fresh air temperature endpoint
Winter compensation – offset at endpoint
Winter compensation – current offset
Current controlled variable/temperature
Current heating setpoint
Current cooling setpoint
Current heating setpoint for saturation temperature (HR, heating 1, cooling 1)
Current cooling setpoint for saturation temperature (HR, heating 1, cooling 1)
Minimal temperature difference cascade control
Maximal temperature difference cascade control
Recirculation damper – Minimum fresh air damper position
(always valid)
Recirculation damper – Maximum fresh air damper position control (always valid)
Recirculation damper (0=closed, 1=open)
Heating/Cooling battery actual request value
Heating/Cooling battery actual mode
0=Winter, 1=Summer
Heating battery 2/post heating battery – valve position
Heating battery 2/post heating battery – Auto start temperature
Heating battery 2/post heating battery – Preheating active
104 / 113
R/W
R/W
R/W
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R
R
R
R
R/W
R
Instruction and Operation Manual ZHK NANO
Unit Modbu s
0,1 °C H56
0,1 °C H57
0,1 °C H58
0,1 °C H60
0,1 °C H61
0,1 °C H62
0,1 °C H63
BACnet
Set_WinCompEnd
Set_WinCompDelta
WinCompVal
CtrlTemp_act
CtrlHeatSet_act
CtrlCoolSet_act
CtrlSatHeatSet_act
LON nvoTemp05
0,1 °C H64
0,1 °C
0,1 °C
H8
H9
0,1 % H71
0,1 % H72
0..1
H38
0.1
% H76
0..1
H74
0,1 % H75
0.1
°C H77
0..1
H73
CtrlSatCoolSet_act
Setpoint_DiffMin
Setpoint_DiffMax
Set_CircDmpMinFreshAir
Set_CircDmpMaxFreshAir
CircDmp_DO
H/CBatt_ActReq
H/CBatt_ActMode
HeatBatt2_Valve
HBatt2_PumpAutoSrtTemp
HBatt2_PreheatAct nvoPerc03
V09-18.1
Instruction and operation manual ZHK NANO
Description
Heating battery 1/pre heating battery – valve position
Heating battery 1/pre heating battery – pre heating active
Heating battery 1/pre heating battery – Auto start temperature
Electric heating battery – power request
Electric heating battery – stage
0=Off, 1=Stage 1
Electric heating battery – power request thyristor stage 1
Electric heating battery – Request Stage 1
Electric heating battery – Request shut down
Heat recovery – power request, bypass damper position(inverse)
Heat recovery – Release temperature
Heat recovery – Startup temperature
Heat recovery – Startup time
Heat recovery – Release request pump
Heat recovery – Shut down request pump
Cooling battery 1 – valve position
Cooling battery 1 – Release temperature
Humidity control:
Humidification – setpoint for Eco mode
Humidification – setpoint for Comfort mode
R/W
R
R
R/W
R
R
R
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
Unit Modbu s
0,1 %
0..1
H80
H44
BACnet
HeatBatt1_Valve
HeatBatt1_PreHeatAct
0.1
°C H39 HBatt1_PumpAutoStrtTemp
0,1 % H85 EBatt_Req
0..1
H86
0,1 % H87
0,1 % H54
0,1 % H49
0,1 % H95
0.1
°C H69
0.1
°C H67
0.1
s H68
0.1
% H65
0.1
% H66
0,1 % H105
0.1
°C H70
0,1 % H130
0,1 % H131
EBatt_Stage
EBatt_Triac
EBatt_Stage1On
EBatt_StageDownHyst
HeatRec_Req
HRec_EnableTemp
HRec_StartupTemp
HRec_StartupTime
HRec_PumpOnVal
HRec_PumpOffVal
CoolBatt1_Valve
CBatt1_EnableTemp
Set_HumEco
Set_HumCmf
LON nvoPerc04 nvoPerc05 nvoSwitch00 nvoPerc06 nvoPerc07
NviHum00 [%]
V09-18.1 105 / 113
Description
Dehumidification – setpoint for Eco mode
Dehumidification – setpoint for Comfort mode
Maximum supply air humidity
Minimum fresh air damper position (for humidity control)
Maximum fresh air damper position (for humidity control)
Humidifier – power
Dehumidification – power request for dehumidification
Air quality control:
CO2 – return air quality setpoint for Eco mode
CO2 – return air quality setpoint for Comfort mode
Minimum fresh air damper position (for air quality control)
Maximum fresh air damper position (for air quality control)
Air quality control request value
Humidity control mode
0=Return humidity, 1=Supply humidity, 2=Room humidity
Circulation damper dehumidification priority
0=Auto, 1=Fresh air, 2=Return air
Circulation damper actual dehumidification priority
0=Fresh air, 1=Return air
Other:
106 / 113
R/W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R/W
R/W
R
Instruction and Operation Manual ZHK NANO
Unit Modbu s
0,1 % H132
0,1 % H133
0,1 % H134
0,1 % H135
0,1 % H136
0,1 % H140
0,1 % H145 ppm H165 ppm H166
0,1 % H169
0,1 % H170
0.1
% H78
0..2
H79
BACnet
Set_DeHumEco
Set_DeHumCmf
Set_SupplyHumMax
Set_MinFreshAirDeHum
Set_MaxFreshAirDeHum
Humidifier_Req
Dehumidification
Set_CO2Eco
Set_CO2Cmf
Set_MinFreshAirQCtrl
Set_MaxFreshAirQCtrl
Act_AirQCtrlVal
Set_HumCtrlMode
LON
NviHum01 [%] nvoPerc08 nviPpm00
[%]
0..2
0..1
H81
H82
Set_DmpDehumPrio
Act_DmpDehumPrio
V09-18.1
Instruction and operation manual ZHK NANO
Description
Alarm acknowledge (1=Acknowledge, automatic return to 0 after 2s)
Description
AHU: sensor alarms
0=Outdoor / fresh air temperature
1=Supply air temperature
2=Return air temperature
3=Saturation temperature
4=Supply fan pressure (nozzle)
5=Return fan pressure (nozzle)
6=Supply air duct pressure
7=Return air duct pressure
8=Return air quality
9=Room temperature
10=Supply humidity
11=Return humidity
R/W
W
Unit Modbu s
0..1
H220
BACnet
Set_AlarmAck
LON
R/W
R
Modbus
I300
BACnet
AHU_SenAlm1
OutDoorTemp
SupplyTemp
ReturnTemp
SaturationTemp
SupplyFlow
ReturnFlow
SupplyDuctPressure
ReturnDuctPressure
ReturnAirQuality
RoomTemp
SupplyHumidity
ReturnHumidity
LON nvoAlarm
Bit 0..15
V09-18.1 107 / 113
Description
AHU: alarms
AHU: alarm states
AHU: digital inputs
0=Supply/fresh air filter 1
1=Return air filter 1
2=Thermostat/electric protection for electric battery
3=Fire alarm
4=Freeze alarm from heating battery 1
5=Alarm heat recovery
6=Freeze alarm from heat recovery
7=Humidifier alarm
8= Pressure plate heat exchanger
9=Supply fan alarm
10=Return fan alarm
11=External Alarm
0=Alarm class 0, Danger
1=Alarm class 1, High(A)
2=Alarm class 2, Low(B)
3=Alarm class 3, Warning(C)
4=AHU stop (Alarm, configuration changed, ...)
5=Hardware error from controller
6=Hardware error from expansion module 1
7=Communication error with room uni
0= Operation signal from supply fan 1
1= Operation signal from supply fan 2
2= Operation signal from return fan 1
3= Operation signal from return fan 2
R/W
R
R
R
Instruction and Operation Manual ZHK NANO
Modbus
I302
I304
I305
BACnet
AHU_DigIpt1
Alm_SupplyFilter1
Alm_ReturnFilter1
Alm_EBatt
Alm_Fire
Alm_Freeze
Alm_HeatRec
Alm_HeatRecFreeze
Alm_Humidifier
Alm_HeatRecPress
SupplyFan_Run
ReturnFan_Run
Alm_UnivExt
AHU_UnitAlm
AHU_Alarmclass0
AHU_Alarmclass1
AHU_Alarmclass2
AHU_Alarmclass3
-
Alm_Controller
Alm_AHUModule1
Alm_RUCom
AHU_InSta1
SupplyFan_Run
ReturnFan_Run
LON nvoState
Bit 0..15
nvoAlarm
Bit 24..31
nvoDI
Bit 0..7
108 / 113 V09-18.1
Instruction and operation manual ZHK NANO
Description
AHU: digital outputs
0=Supply fan 1
1= Return fan 1
2=Pump/enable heat recovery
3=Pump heating battery 1
4=Pump heating battery 2
5=Pump cooling battery 1
6=Stage 1 electric battery
7=Humidifier pump/enable humidifier
8=Humidifier filling valve
9=Humidifier draining valve
10=Fresh/Exhaust damper
11=AHU Run
12=AHU Alarm
13=AHU Warning
14=Cool/Heating mode
15=Winter/Summer mode
0=Hardware contact operation mode
V09-18.1
R/W
R
Modbus
I310
R I311
BACnet
AHU_OutSta1
SupplyFan_Stage
ReturnFan_Stage
HeatRec_Pump
HeatBatt1_Pump
HeatBatt2_Pump
CoolBatt1_Pump
-
Humidifier_Pump
Hum_FillVlv
Hum_DrainVlv
SuEx_Dmp
AHU_Run
AHU_Alarm
AHU_Warning
AHU_CoolHeat
WinSumSwitch
AHU_OutSta2
HW_OPMFix
LON nvoDO
Bit 0..15
109 / 113
Legend
Modbus functions
Table 42: Data point list AHU
Instruction and Operation Manual ZHK NANO
(1)
(2)
(3)
(4)
Flow rate setpoints valid with flow rate control
Speed setpoints valid with speed control
Pressure setpoints valid with duct pressure control
Stage setpint valid with stage control
(5) Bit number
16Bit Unsigned Integer, 16Bit, the single bits are states/alarms
R32,
W32
0= .. Bit 0
1= .. Bit 1
Double Integer (32 Bit), MSW/LSW
Register I: Read Input Register (FC4),
Register H: Read Holding Register (FC3)
Write single Holding Register (FC6),
Write multiple Holding Registers (FC16)
Statusbit S: Read Input Status (FC2)
110 / 113 V09-18.1
Instruction and Operation Manual ZHK NANO
Figure index
V09-18.1 111 / 113
Instruction and Operation Manual ZHK NANO
112 / 113 V09-18.1
Instruction and Operation Manual ZHK NANO
Table index
AHU controller ................................................................................. 88
V09-18.1 113 / 113
Euroclima group factories
Euroclima AG | SpA
St. Lorenzner Str. | Via S. Lorenzo 36
39031 Bruneck | Brunico (BZ)
ITALY
Tel. +39 0474 570 900
Fax +39 0474 555 300 [email protected]
www.euroclima.com
Euroclima India Pvt Ltd.
Office No. 7, Ground Floor,
Building No. 2, Sector 3
Millenium Business Park, Mahape
400 710 Navi Mumbai
INDIA
Tel. +91 22 4015 8934 [email protected]
www.euroclima.com
Euroclima Apparatebau Ges.m.b.H.
Arnbach 88
9920 Sillian
AUSTRIA
Tel. +43 (0) 48 42 66 61 -0
Fax +43 (0) 48 42 66 61 -24 [email protected]
www.euroclima.com
Bini Clima S.r.l.
Via A. Prato, 4 / A
38068 Rovereto
ITALY
Tel. +39 0464 437 232
Fax +39 0464 437 298 [email protected]
www.biniclima.eu
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P.O.Box: 119870
Dubai
UNITED ARAB EMIRATES
Tel. +9714 802 4000
Fax +9714 802 4040 [email protected]
www.euroclima.com
Euroclima V09-18.01
Due to it’s commitment of continuous product development and improvement, Euroclima reserves the right to change specifications without notice.
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