Ventus 22/0,55/2 VSD10 User manual

VENTUS Air-Handling Units
Operation and Maintenance Manual
DTR-VS-ver.5.1 (03.2018) l

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Ventus Air Handling Units
OPENING THE INSPECTION PANELS WHEN THE UNIT IS RUNNING OR
STARTING THE UNIT WITH OPEN INSPECTION PANELS ARE STRICTLY
PROHIBITED!
BEFORE OPENING THE INSPECTION PANEL TURN OFF THE UNIT AND WAIT
TWO MINUTES SO ALL MOVING PARTS WOULD STOP!
SWITCH OFF AND PROTECT THE POWER SUPPLY TO PREVENT THE UNIT
FROM UNINTENDED STARTING
!

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Ventus Air Handling Units
Table of Contents
Table of Contents ..................................................................................................................................3
1. INTRODUCTION ...........................................................................................................................5
2. APPLICATION AND DESIGN .......................................................................................................5
3. TRANSPORT AND STORAGE .....................................................................................................9
4. FOUNDATION, ASSEMBLY, CONNECTION OF UNIT-RELATED SYSTEMS .........................11
4.1 AHUs supplied in sections...................................................................................................11
4.2 AHUs supplied in packages - for assembly on site .............................................................11
4.3 Ambient conditions for AHUs installation ............................................................................11
4.4 Conditions of AHU assembly carried out by Authorized VTS Service ................................12
4.5 Foundation...........................................................................................................................14
4.6 Place of foundation..............................................................................................................19
4.7 Connecting the ventilation ducts..........................................................................................19
4.8 Connection of heaters and coolers......................................................................................20
4.9 Connection of evaporative humidifier ..................................................................................23
4.10 Draining out condensate......................................................................................................25
4.11 Electric connection ..............................................................................................................26
4.11.1 Rotary exchanger .............................................................................................................26
4.11.2 Evaporative humidifier ......................................................................................................27
4.11.3 Electric Heater ..................................................................................................................28
4.11.4 Fan’s motor.......................................................................................................................31
4.11.5 Air Dampers......................................................................................................................34
4.11.6 Automatic control..............................................................................................................34
5. PREPARATION FOR START-UP ...............................................................................................34
5.1 Electrical system..................................................................................................................34
5.2 Filters ...................................................................................................................................34
5.3 Water and glycol heaters.....................................................................................................35
5.4 Electric heaters ....................................................................................................................35
5.5 Water and glycol coolers, freon coolers and heaters ..........................................................35
5.6 Evaporative humidifier .........................................................................................................35
5.7 Cross-flow and counter-flow heat exchangers ....................................................................36
5.8 Rotary exchanger ................................................................................................................36
5.9 Fan unit................................................................................................................................36
6. START-UP AND ADJUSTMENT.................................................................................................37
6.1 Measurement of air quantity and AHU output adjustment. .................................................38
6.2 Heat output adjustment of water heater ..............................................................................38
6.3 Adjustment of electric heater ...............................................................................................39
6.4 Adjustment of cooler performance ......................................................................................39

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6.5 Adjustment of humidifier ......................................................................................................40
7. OPERATION AND MAINTENANCE............................................................................................40
7.1 Dampers ..............................................................................................................................41
7.2 Filters ...................................................................................................................................41
7.3 Heat exchangers .................................................................................................................43
7.3.1 Water and glycol heater...............................................................................................43
7.3.2 Electric Heater .............................................................................................................44
7.3.3 Water or glycol cooler..................................................................................................44
7.3.4 Freon cooler and heater ..............................................................................................44
7.3.5 Humidifier.....................................................................................................................44
7.3.6 Cross-flow and counter flow heat exchanger ..............................................................44
7.3.7 Rotary exchanger ........................................................................................................47
7.4 Suppression section ............................................................................................................47
7.5 Fan unit................................................................................................................................47
7.5.1 Fans.............................................................................................................................47
7.5.2 Motors..........................................................................................................................50
7.5.3 Belt transmission .........................................................................................................52
7.6 Test measurements.............................................................................................................55
8. SAFETY INSTRUCTIONS...........................................................................................................55
9. INFORMATION............................................................................................................................56
10. TECHNICAL INFORMATION TO THE REGULATION (EU) No 327/2011 IMPLEMENTING
DIRECTIVE 2009/125/EC ...................................................................................................................57

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1. INTRODUCTION
In-depth familiarization with the content of this manual, assembly and operation of the air-handling
unit in line with the instructions provided and obeying all safety regulations constitute the basis of
efficient, safe and non-failure operation of the device.
Works related to unloading packages with AHU subassemblies, transportation of the packages, AHU
blocks and elements, connecting AHU-related systems as well as maintenance and repair are carried
out by qualified specialists or they are supervised by authorized staff.
The qualified technical personnel is understood as the trained specialists, who due to the
professional experience, knowledge of the subject-related standards, documentation and regulations
concerning operation and safety procedures, have been authorized to perform necessary operations
and who are able to troubleshoot any potential problems.
This operation and maintenance manual does not cover all possible variants of the units
configurations, examples of their assembly and installation as well as start-up, operating, repairing
and maintenance. If the units are used for what they are intended, this documentation and any other
materials provided with the unit contain information designed for the qualified technical personnel
only.
Assembly of the unit, connection of related systems, start-up, operation and
maintenance of the device have to comply with the directives and regulations being in
force in the country where the unit is installed.
AHU VS 21-650 assembly and guarantee repairs can be carried out only by VTS Service
Provider with appropriate certificates. It is recommended to engage VTS Authorized
Service Providers for installation, start-up, maintenance and repairs of the AHU units.
This manual should always be kept handy for reference and be easily available for the
servicing personnel.
2. APPLICATION AND DESIGN
The 14-size product line is designed for air handling processes in range of capacity from 1200 m3/h
to 100 000 m3/h - in case of remaining AHUs. The VENTUS air-handling units are designed for a
ventilation system where an access to the rotating parts of the unit (a fan’s rotor) is feasible neither
from the overpressure nor sub atmospheric pressure side of the unit. The ventilation system is
understood as ventilating ducts as well as e.g.: air intake and air exhaust modules in case of the units
installed outdoor.
Fan Recovery with glycol coils
Filtering Recovery with cross-flow
Water heating Recovery with rotary exchanger
Electric heating
Water cooling
Freon cooling Attenuation
Humidification
Recovery with glycol coils
Recovery with cross-flow exchangers
Recovery with cross-flow exchangers
Recovery with rotary exchanger
Recovery with recirculation
Secondary filtration
Attenuation

Table 1. Marking of AHU base modules
Base modules Module composition Graphic symbol
V Fan
FV Filter, fan
H Filter, heater, fan
HC/CH
HC
CH
Filter, heater, cooler, fan
HCH VS 21-650 Filter, heater, cooler, fan,
heater
C Filter, cooler, fan
P Cross-flow exchanger
P
Counter-flow exchanger
R Rotary exchanger
F Secondary filter
E Empty box
M Mixing box
S Silencer
W Humidifier

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Exhaust-air AHU Supply-air AHU
AHU with rotary exchanger AHU with cross-flow exchanger
Fig. 1 Examples of AHUs type VS 21-650 functional configurations
Example of basic supply unit consist of a filter, water coils, condensate drain pan (if applicable),
direct driven fan assembly. Supply - Exhaust AHUs can be equipped with rotary heat exchanger,
cross-flow or counter-flow heat exchanger.
Fig.2. Example of the basic supply unit: 1 – panel filter, 2 - coil, 3 – direct driven fan, 4 – casing

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Fig.3. Example of the basic supply-exhaust unit: 1 – bag filters, 2- counter-flow heat
exchanger, 3 - droplet eliminator, 4 – coil, 5 - direct driven fans, 6 – casing
Majority of AHU-s configuration is available in left-hand (LH) and right-hand (RH) version (fig. 3 and
4). The version of the unit is determined by the flow direction of the air against the tending side of the
unit (the side where the inspection panels are located). In case of supply-exhaust units the version is
determined by the flow direction of the air in the supply section.
Left-hand version Right-hand version
Fig. 4 Versions of the VS 21-650 HU
ir flow direction

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3. TRANSPORT AND STORAGE
The VENTUS AHUs from size range VS 21-650 are delivered as fully assembled,
assembled in sections or in packages, placed on closed palettes, containing elements to
be assembled on- site by the Authorized VTS Service. This manual does not contain
instructions and guidelines on assembly of the unit.
Delivery of AHUs elements, in the closed, properly marked and not broken palettes is
going to belong to customer after signing of consignment note by client representative.
Open of closed palettes by customer before arrival of Authorized VTS Service is connect
with take-over of full responsibility for contents and completeness of delivery.
Right after delivery of the unit check the condition of the package and examine if all
necessary elements have been delivered - according to the attached specification and
consignment note.
Unloading packages with AHU subassemblies, transport of the packages to the assembly
location and transport of AHU blocks and elements to the assembly location should be
carried out using special equipment and qualified staff.
Packages onsite must be stored on hardened, dry and protected against any precipitation
place. Hardened surfaces are understood as flat, leveled and hard surface, which does
not change its properties under influence of atmospheric conditions
Packages containing AHU elements should be stored away from places where operate
mechanical devices (vehicles, cranes and other construction machinery). They should be
stored in places where they will not be subject to any mechanical damages, humidity,
aggressive chemical agents, fluids, dusts and other external agents which may
deteriorate their condition.
Unloading pallets from means of transport and transporting them to the AHU’s assembly site should
be performed with the use of a fork lift or crane.
A possibility of transporting assembled AHUs is determined in Table 2.
Table 2. Possibilities of transporting assembled AHUs.
AHU type Possible to transport Impossible to transport
VS 21-75 with a
base frame
supply, exhaust, supply-exhaust AHUs with
the cross-flow heat recuperator, with the
rotary regenerator up to 7 modules long
(2587mm)
AHUs over 7 modules long (2587mm) and
AHUs up to 7 modules supply and exhaust
placed one on another, with cross-flow heat
recuperator, with rotary regenerator where the
top part projects over the bottom one.
VS 100-150 with a
base frame
supply, exhaust, supply-exhaust AHUs with
the cross-flow heat recuperator, with the
rotary regenerator up to 6 modules long
(2221mm)
AHUs over 6 modules long (2221mm) and
AHUs up to 6 modules supply and exhaust
placed one on another, with cross-flow heat
recuperator, with rotary regenerator where the
top part projects over the bottom one.
VS 180 - 650 supply as well as exhaust up to 6 modules long
(2195mm)
supply as well as exhaust AHUs longer than 6
modules (2195mm), supply and exhaust AHUs
placed one on another with the cross-flow
recuperator, with the rotary regenerator

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Transport of assembled blocks of AHUs described in Table 2 as fit for transport should be carried out
with the use of a fork lift or a crane (fig. 5).
For the transport of the units VS 21-150 with the crane should be used some metal holder and
wooden supports or use the holes in the base frame supports in order to mount an appropriate pipe
bar. In the case of transport VS 180-650 units with the use of a crane it is necessary to use holes in
the frames in order to mount an appropriate pipe bar. Lifting strings must be spaced with the use of
beams of appropriate length.
Fig. 5a Using a forklift truck to transport the unit
Fig. 5 Transport with the use of a crane
b) VS 21-150 AHUs with using wooden supports
c) VS 21-150 AHU sections with using steel pipes
d) VS 180-650 AHUs
AHU have to be transported in their working position (horizontally) and they should not be stored one
on the other.
The units and their components should be stored in rooms characterized by the following conditions:
relative humidity:
φ< 80 % at t (temperature) = 20ºC
ambient temperature: -40ºC < t < +60ºC
- the devices should be out of the reach of any caustic dust, gas or steam as well as any other
chemical substances which may have pro-corrosive influence on the unit and its components.
While storing the unit, its plastic packaging must be unsealed.
Any damages caused by improper transportation, unloading or storage are not covered
by the guarantee and any claims laid by way of aforementioned issues will not be
examined by VTS.
c)
d)

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4. FOUNDATION, ASSEMBLY, CONNECTION OF UNIT-
RELATED SYSTEMS
4.1 AHUs supplied in sections
Sections connection is out of the standard offer of VTS. It is possible to purchase
additional option to connect to the section by Authorized Service VTS.
When the customer connect the section himself should follow the separate instructions,
supplied with AHU in the mounting set.
During connecting the section one should pay attention on the applying glue on the
casing locks (section connection without using glue will result in a lack of casing
tightness - warranty claims because of this will not be considered).
Optionally, in the mounting set provided with AHU can be included butyl tape, to
additional seal the connection of section. Additional seal at the connection of section is
recommended especially for the external AHUs
4.2 AHUs supplied in packages - for assembly on site
Assembly must be carried out on hardened and dry surface. Hardened surfaces are
understood as flat, leveled and hard surface, which does not change its properties under
influence of atmospheric conditions and is resistant to any damages relating to placing
the AHU on it as well as regular operation.
Assembly can be carried out in ambient temperature allowing to perform correctly all
technical procedures of the assembly, i.e. within temperature range: from +5 to +35ºC
In case of outdoor assembly, the procedure can be carried out in precipitation-free
conditions.
It is acceptable to start the assembly provided that all safety and security requirements
are met.
Minimal dimensions of an assembly location:
- AHU width + 4 meters (2 meters on each AHU side),
- AHU length + 4 meters (2 meters on each AHU side).
Connecting supplied blocks of VS 21-650 units as well as holding AHU to the foundation,
falls within the competence of the Client.
4.3 Ambient conditions for AHUs installation
The Ventus air-handling can be installed as well as inside the building as the outside (except the unit
with the humidity sections). Units can be installed and work on the external air with temperature from
-40°C to +60°C.
AHUs installed outside the building should be equipped with air intake and outlet equipment.
The unit operated outdoor should be regularly cleaned from the snow. Such units should have barrier
for protect against the snow, and base frame should placed on the level not lower than height of
snow level in that region.
In condition of the low temperatures, increase the heat lost, what can needs more reserve of the
heating capacity of the heaters. The heat node of the heating capacity regulation, three way valves,
water pumps, thermo-manometers, valves, as well as frequency converters should be placed in the
room with temperature higher than +5°C.

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If the unit operate with the low inlet temperature of the air it is recommended to use the mixture of
the glycol (up to 45%) as the heating medium. All installation pipes of the water heating, condensate
drying, hydraulic valves should be well isolated. The best is use the pre-heater before the heat
recovery section.
The air damper actuators should be protected from the atmospheric conditions. If the outdoor
temperature is lower than -20°C, the air dampers actuators must be equipped with heating. All
equipment and components operating outside the unit must have the required IP.
Units, periodically stopped during periods of low outdoor temperatures, require special attention.
They should be equipped with an automation system, that supports the flow of the liquid through
water heaters to prevent it from freezing during AHU downtime. If it is possible that temperature in
the fan section fall below -30°C or lower, the sections should be equipped with an internal heating
system to ensure reliable start of the motors after shutdown and downtime.
4.4 Conditions of AHU assembly carried out by Authorized VTS Service
In case of AHU delivered in packages VTS provides a charge-free assembly and installation within
200km from the location of the nearest authorized service in a country in which VTS has its
representatives. A list of Authorized VTS Services is available a www.vtsgroup.com.
In case when the installation is to be carried out in a place located over 200 km from the business
residence of the nearest VTS service, the customer is obligated to cover:
- Transport expenses of the Authorized VTS service arising from the excessive distance
- Accommodation and food for the Authorized VTS service crew.
AHU assembly can be realized only by service which has an appropriate VTS Authorization
Certificate allowing it to provide such a service.
As per the presented offer to range of service does not include: AHU section connection, connection
of the power supply, automation controls (wiring of the unit, control panel, frequency converters for
the unit motors, sensors, and valves) to the unit as well as it doesn’t include the connection of units
to the ventilation ducts.
Preparation for assembling
Before starting AHU assembly VTS shall send to customer a document entitled ‚Confirmation of
Readiness for Assembly’ (enclosure no 1).
The document contains important information about the installation process. Having satisfied
conditions specified in it the document should be signed in the indicated place and sent to the
specified VTS office.
ATTENTION: Sending the ‚Confirmation of Readiness for Assembly’ is indispensable to start the
assembly process by Authorized Service. If real conditions do not correspond to the information
given in confirmation VTS shall be entitled to demand reimbursement of the costs incurred due
to service stoppages or additional actions performed by the service on site.
Assembly site
Appropriately prepared place of assembly should meet the following conditions:
The right surface – the surface should be hard, dry, protected from atmospheric influence, and
damage resistant (placement of the unit, installation works).

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- The required installation place area:
- Width of the unit + 4 meters (two meters on each side of the
unit)
- Length of the unit + 4 meters (two meters on each side of the unit)
- Base of the unit made in compliance with the requirements described in chapter 4.2.2.
- The 230V power supply should not be located further than 20m from the installation place
which should be properly lit.
- The place of installation shall provide a safe environment for the installation crew.
And additionally the following should be provided:
- Availability of individual AHU elements or pallets including packages on the assembly place of
a particular AHU. Ensured transport of AHU elements and AHU blocks to the place of installation.
- A possibility of service entering the site and starting assembly immediately after their arrival.
- making the Warranty Card and Delivery documents supplied with a particular AHU available to
the service.
Assembly completion
After the installation is completed the service is obliged to:
- notify the client’s representative about the fact of finishing assembly.
- put into service a clean AHU labelled with provided pictograms and VTS labels, ready to be
connected to a power source (wiring), utilities and control systems,
- Hand control elements over to the client’s representative if at his request they were not
assembled in the AHU,
- Hand a filled in Warranty Card of a VTS AHU over to the Client
- hand the ‚Assembly Acceptance Protocol’ documentation to be signed by the client and provide
them with a copy of this document,
- put assembly waste in a place indicated by the client’s representative not farther than 20 meters
away from the place of assembly,
- Leave the assembly place in the state from before the assembly
VTS on-site assembly does not include:
a. Setting up of electrical wiring, connection to heating of freezing sources and assembly of
exchanger valve,
b. Connection, assembly and start-up of control elements (except for damper actuators, pressure
control and anti-frost thermostat) and engines zeroing,

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Ventus Air Handling Units
c. Placing, balancing and anchoring of air handling units,
d. Connecting air handling units to ventilation ducts, utilities and electricity.
e. Start-up of air handling units,
f. Recycling of containers in which air handling units were delivered.
4.5 Foundation
The unit should be placed on:
- a foundation slab
- a steel base frame concreted into the floor
- an appropriate stiff steelwork
The foundation, steel base frame or steelwork have to be flat and leveled and they should be able to
support the weight of the unit.
In AHUs situated one on another the part of the upper AHU projecting outside the outline of the
bottom one must be supported with the use of an appropriate construction fig. 6a.
Height of the foundation slab or base frame must allow for assembly of the siphon which drains the
condensate out of the draining tray. In case of the drain plates installed in the lower AHU sections,
the unit has to be mounted onto additional foundation slab or a special hollow must be made directly
under the siphon.
Fig.6. Examples of HU foundation

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Ventus Air Handling Units
Fig.6a Sample of supporting of supply-exhaust AHUs’ top sections
Fig.7a. Base frame of VS 21-75 AHUs
Fig.7b. Base frame of VS 100-150 AHUs
AHU size Max. load
[N]
VS 21 500
VS 30 500
VS 40 500
VS 55 1000
VS 75 1000
VS 100 1500
VS 120 2000
VS 150 2000
VS 180 3500
VS 230 4000
VS 300 5000
VS 400 6000
VS 500 8500
VS 650 9000

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Fig.7c. Base frame of VS 180-650 AHUs
Rys.7d. Base frame of VS 21-650 sectional AHUs
Table 3a External dimensions of VS 21-1 0 AHUs’ transport frames Table 3b. Length of the base frame in relation to the AHU section
AHU size
Frame length L
R
W
3
mm
VS-21
L = Lt-110
937
VS-30 937
VS-40 1144
VS-55 1315
VS-75 1456
VS-100 1636
VS-120 1867
VS-150 2061
VS-180
L=Lt-28
1960
VS-230 2368
VS-300 2460
VS-400 2960
VS-500 3460
VS-650 3572
Length of the AHU
section
Ls (VS 21-150) Ls (VS 180-650)
[Mod] [mm]
2 758 649 732
3 1124 1015 1098
4 1490 1380 1464
5 1856 1746 1830
6 2221 2112 2198
7 2587 2477 -

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Fig.7e. Location of end foundation holes in base frames of the VS 180-650 AHUs
Fig.8. Base frame of the AHU's blocks
a) VS 21-75

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W3
b) VS 100-150
c) VS 180-300
d) VS 400-650
All base frame profiles must be supported.
For foundation holding of the VS 21-150 AHUs should be drilled holes in the bottom part of the
longitudinal profile of base frame.
For foundation holding of the VS 180-650 AHUs can be used a holes in the ends of longitudinal
profiles of base frame (fig.7d). To fix AHU base frame to foundation should be used bolts M10
AHUs must be anchored to the foundation.
Anchoring AHUs is out of VTS delivery.

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4.6 Place of foundation
The AHU should be installed so that connections of any related systems (ventilation ducts, pipelines,
cabling, etc.) do not collide with the inspection panels.
It is forbidden to place any elements on the AHU as well as use the AHU as a support
of ventilation ducts and other building components.
In order to carry out the assembly, operation and maintenance successfully, please keep minimum
recommended distance (fig.9) between the front side and existing construction elements (walls,
pillars, pipelines, etc.).
In compact AHUs where the exchangers’ pins are led to the side opposite to the
access side an appropriate distance required for proper assembly of the power supply
installation elements should be maintained.
This is possible to install other systems, pipelines, pillars in the operation area only if they can be
easily disassembled for the maintenance and service procedures.
Fig.9. Free space in the front area - the VS 21-650 AHU
4.7 Connecting the ventilation ducts
The ventilation ducts should be connected to the AHU with the flexible connections (optional
accessory) which suppress vibrations of the unit and level the coaxial deflection of the duct and the
AHU outlets. Flexible connections are equipped with flanges with sealing. The flexible flanges
should be connect with ducts with using drilling screws (Fig.10a) or additional clamping elements
(Fig. 10b). Materials to connect ducts are not supplied as standard delivery.
Appropriate operation of the flexible connection occurs if it is stretched to about 110 mm.
The ducts connected to the AHU have to be suspended or underpinned with dedicated support
elements. Conducting the ducts with the fittings should be done in a way to eliminate possible
increase of noise level in the ventilation system.

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Ventus Air Handling Units
Fig.10. Duct’s connection rules
4.8 Connection of heaters and coolers
Connection of the exchangers should be carried out so as not to allow for stresses which may
result in mechanical damages or leakage. The pipeline weight and thermal stresses cannot be
passed onto the exchanger's connections. Depending on a local conditions please use the
compensation at the supply and return of the pipeline system, in order to level the pipeline's linear
expansion. During assembly of the supply system to the exchangers equipped with the screwed
connections, counter the exchanger's connection with additional wrench (fig.11).
The supply system should be planned so as it does not collide with the other AHU sections. Applied
method of connecting the exchangers with the supply system should allow for an easy pipeline
disassemble in order to remove the exchanger from the AHU, during maintenance and service
operations.