Trox Technik VARYCONTROL LVC Guide

VAV terminal units
VARYCONTROL
Installation and commissioning manual
Read the instructions prior to performing any task!
LVC • TVE • TVR • TVJ • TVT • TZ-/TA-Silenzio
TVZ • TVA • TVM • TVRK • TVLK
GB/en

A00000071368, 2, GB/en
© TROX GmbH 2018
TROX GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Germany
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.trox.de
03/2020
VAV terminal units VARYCONTROL2

General information
Information about the installation and commis-
sioning manual
This installation and commissioning manual enables
operating or service personnel to use the variable air
terminal unit (VAV terminal unit) safely and efficiently.
The manual must be kept near the unit to be available
for use at all times.
Personnel who intend to work on the VAV terminal unit
must read and fully understand this manual before
starting any work. The basic prerequisite for safe
working is to comply with the safety notes and all
instructions in this manual.
The local regulations for health and safety at work and
the general safety regulations for the area of application
of VAV terminal unit also apply.
Illustrations in this manual are mainly for information
and may differ from the actual design.
Other applicable documentation
In addition to this manual, the following documents
apply:
Product data sheets
Instructions for the electrical control components
(assemblies)
Project-specific wiring documents, if any
TROX Technical Service
To ensure that your request is processed as quickly as
possible, please keep the following information ready:
Product name
TROX order number
Delivery date
Brief description of the fault
Online www.troxtechnik.com
Phone [phone]
Safety notes
Symbols are used in this manual to alert readers to
areas of potential hazard. Signal words express the
degree of the hazard.
Comply with all safety instructions and proceed carefully
to avoid accidents, injuries and damage to property.
DANGER!
Imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING!
Potentially hazardous situation which, if not avoided,
may result in death or serious injury.
CAUTION!
Potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
NOTICE!
Potentially hazardous situation which, if not avoided,
may result in property damage.
ENVIRONMENT!
Environmental pollution hazard.
Tips and recommendations
Useful tips and recommendations as well as informa-
tion for efficient and fault-free operation.
General information
VAV terminal units VARYCONTROL 3

Safety notes as part of instructions
Safety notes may refer to individual instructions. In this
case, safety notes will be included in the instructions
and hence facilitate following the instructions. The
above listed signal words will be used.
Example:
1. Loosen the screw.
2.
CAUTION!
Danger of finger entrapment when closing
the lid.
Be careful when closing the lid.
3. Tighten the screw.
Specific safety notes
The following symbols are used in safety notes to alert
you to specific hazards:
Warning signs Type of danger
Warning – high-voltage.
Warning – danger zone.
General information
VAV terminal units VARYCONTROL4

1 Security ............................................................. 6
1.1 Correct use.................................................. 6
1.2 Safety signs................................................. 6
1.3 Residual risks.............................................. 6
1.3.1 Electric shock hazards............................. 6
1.4 System owner's responsibility..................... 7
1.5 Staff............................................................. 7
1.6 Personal protective equipment.................... 7
1.7 General safety measures............................ 8
1.8 Repair and replacement parts..................... 8
2 Transport, storage and packaging................... 9
2.1 Delivery check............................................. 9
2.2 Transport on site.......................................... 9
2.3 Storage........................................................ 9
2.4 Packaging.................................................... 9
3 Product description......................................... 10
3.1 VAV terminal unit types.............................. 10
3.1.1 Round VAV terminal units, steel............. 10
3.1.2 Rounded VAV terminal units, plastic....... 11
3.1.3 Rectangular VAV terminal units, steel ... 12
3.2 Detection of the control components......... 14
3.3 Position of the damper blade..................... 14
4 Installation........................................................ 15
4.1 Security...................................................... 15
4.2 Installation information.............................. 15
4.3 Installation orientation............................... 15
4.4 Direction of airflow..................................... 15
4.5 Upstream conditions.................................. 16
4.5.1 Circular ducting...................................... 16
4.5.2 Rectangular ducting............................... 17
4.6 Affixing/suspension.................................... 19
4.6.1 General information................................ 19
4.6.2 Rounded units........................................ 19
4.6.3 Rectangular units................................... 20
4.6.4 Installation of secondary silencer........... 20
4.7 Connecting the duct.................................. 22
5 Wiring............................................................... 24
5.1 Installation notes....................................... 24
6 Commissioning and operation....................... 25
6.1 Commissioning.......................................... 25
6.2 Operation................................................... 25
6.3 Volume flow rate measurement................. 26
6.3.1 Volume flow rate calculation................... 26
7 Maintenance..................................................... 27
7.1 System owner's responsibility................... 27
7.2 Maintenance.............................................. 27
7.3 Inspection measures................................. 27
7.4 Repair........................................................ 27
7.5 Maintenance service................................. 27
8 Troubleshooting.............................................. 28
9 K values............................................................ 29
10 Control component/attachments................... 31
11 Declaration of conformity............................... 32
Table of contents
VAV terminal units VARYCONTROL 5

1 Security
1.1 Correct use
VAV terminal units
VAV terminal units are designed for variable volume flow
control, restriction or shut-off in room air distribution and
ventilation systems within closed rooms.
Do not use VAV terminal units in extract air systems in
commercial kitchens unless the extract air has been
cleaned as much as possible with high-efficiency aer-
osol separators; see VDI 2052.
Only VAV terminal units with static pressure transmitters
are allowed to be used in ventilation systems with dust-
laden air.
Only VAV terminal units of the TVLK and TVRK types
are allowed to be used in ventilation systems with
chemical contamination (e.g. extract air from fume cup-
boards).
Incorrect use
WARNING!
Danger of injury or risk of damage to property
due to incorrect use!
Incorrect use of the VAV terminal unit can lead to
dangerous situations.
Do not use the VAV terminal unit:
– in areas with potentially explosive atmospheres
– in aircraft
– outdoors without sufficient protection against the
effects of weather
– in wet areas
– for areas of application that are not described in
this manual
Modifying the unit or using replacement parts that have
not been approved by TROX is not permitted.
1.2 Safety signs
The following symbols and signs are usually found in
the work area. They apply to the very location where
they are found.
WARNING!
Danger due to illegible signage!
Over time, stickers and signs may fade or become
otherwise illegible, meaning that hazards cannot be
identified and necessary operating instructions
cannot be followed. There is then a risk of injury.
– Ensure that all of the safety, warning and oper-
ating information is clearly legible.
– Replace illegible signs or stickers immediately.
Electrical voltage
Only skilled qualified electricians are allowed to work in
areas marked as having electrical voltage.
Unauthorised persons must not enter areas, open cabi-
nets or work on components where an electrical voltage
is present and which are hence marked with this
symbol.
1.3 Residual risks
The VAV terminal unit is a state-of-the-art product and
meets current safety requirements. Residual risks
cannot be excluded, however, and you should proceed
with caution. This section describes the residual risks
that have been identified in a risk assessment.
Always observe the safety notes in this manual to
reduce health hazards and prevent any hazardous sit-
uations.
1.3.1 Electric shock hazards
Electric current
DANGER!
Danger of death due to electric current!
Danger of electric shock! Do not touch any live com-
ponents! Damaged insulation or damaged parts are
a life threatening hazard.
– Have work on the electrical system carried out
only by skilled qualified electricians.
– If the insulation is damaged, disconnect the
power supply immediately and have the insula-
tion repaired.
– Before you start working on electric systems and
equipment, switch off the supply voltage and
secure it against being switched on accidentally.
Comply with the following safety rules:
– Switch off the power supply.
– Secure it against being switched on acciden-
tally.
– Ensure that no voltage is present.
– Connect to the earth; short circuit connection.
– Do not bypass or disable any circuit breakers. Be
sure to maintain the correct current rating when
you replace a circuit breaker.
– Ensure that live parts do not come into contact
with moisture. Moisture can cause a short circuit.
Security
Residual risks > Electric shock hazards
VAV terminal units VARYCONTROL6

1.4 System owner's responsibility
System owner
The system owner is a natural or legal person who for
commercial or business purposes owns or manages the
ventilation system or component or allows third parties
to use or operate it, but continues to bear legal respon-
sibility for the safety of users, staff or third parties while
the product is in use.
System owner's obligations
The unit is intended for commercial use. The system
owner is therefore subject to the legal obligations of
occupational health and safety regulations.
In addition to the safety notes in this manual, the appli-
cable regulations for safety, accident prevention and
environmental protection must also be complied with.
In particular:
The system owner must be aware of the applicable
occupational health and safety regulations and carry
out a risk assessment to determine any additional
hazards that may exist or result from the specific
working conditions at the installation location. The
system owner has to create operating instructions
for the unit that reflect the results of this risk assess-
ment.
The system owner has to ensure, throughout the
entire operating period of the unit, that these oper-
ating instructions conform to applicable standards
and guidelines; in case of any deviation, the system
owner has to adapt the instructions.
The system owner must secure the unit to prevent
access by unauthorised individuals.
The system owner must clearly define the responsi-
bilities for operation, maintenance, cleaning, trouble-
shooting and removal.
The system owner has to ensure that all individuals
who handle or use the unit have read and under-
stood this manual.
The system owner must provide the employees with
the required personal protective equipment.
The system owner must observe the local fire regu-
lations.
Hygiene requirements
The system owner has to comply with the local regula-
tions and harmonised standards for hygiene require-
ments. This includes regular maintenance and inspec-
tion intervals.
1.5 Staff
Qualification
The work described in this manual has to be carried out
by individuals with the qualification, training, knowledge
and experience described below:
HVAC technician
HVAC technicians are individuals who have sufficient
professional or technical training in the field they are
working in to enable them to carry out their assigned
duties at the level of responsibility allocated to them and
in compliance with the relevant guidelines, safety regu-
lations and instructions. HVAC technicians are individ-
uals who have in-depth knowledge and skills related to
HVAC systems; they are also responsible for the profes-
sional completion of the work under consideration.
HVAC technicians are individuals who have sufficient
professional or technical training, knowledge and actual
experience to enable them to work on HVAC systems,
understand any potential hazards related to the work
under consideration, and recognise and avoid any risks
involved.
Skilled qualified electrician
Skilled qualified electricians are individuals who have
sufficient professional or technical training, knowledge
and actual experience to enable them to work on elec-
trical systems, understand any potential hazards related
to the work under consideration, and recognise and
avoid any risks involved.
1.6 Personal protective equipment
Personal protective equipment is equipment that pro-
tects the user against health or safety risks at work.
Personal protective equipment must be worn for various
types of work; the protective equipment required is
listed in this manual together with the description of
each type of work.
Description of personal protective equipment
Industrial safety helmet
Industrial safety helmets protect the head from falling
objects, suspended loads, and the effects of striking the
head against stationary objects.
Protective gloves
Protective gloves protect hands from friction, abrasions,
punctures, deep cuts, and direct contact with hot sur-
faces.
Security
Personal protective equipment
VAV terminal units VARYCONTROL 7

Safety shoes
Safety shoes protect the feet from crushing, falling parts
and prevent slipping on a slippery floor.
1.7 General safety measures
Large temperature differences
Be careful when there is a large temperature difference.
Do not put the VAV terminal unit into operation immedi-
ately if it has been transported from an unheated area to
a warm one. Condensation may damage the electronic
components beyond repair. Only after about 2 hours will
the system have reached room temperature.
Foreign matter and liquids
Be careful when objects or liquids have got into the
casing, or if the unit emits a smell or smoke. Decommis-
sion the VAV terminal unit and have it checked by the
manufacturer.
1.8 Repair and replacement parts
Only qualified personnel are allowed to repair the
devices and only genuine replacement parts are
allowed to be used. This applies in particular to work on
the electrical equipment. For safety reasons, therefore,
have defective devices repaired by TROX Technical
Service,
Ä ‘TROX Technical Service’ on page 3.
Security
Repair and replacement parts
VAV terminal units VARYCONTROL8

2 Transport, storage and
packaging
Sharp edges and sheet metal parts
CAUTION!
Danger of injury from sharp edges and sheet
metal parts.
– Always wear protective gloves when handling the
unit.
Damage to the VAV terminal unit
NOTICE!
Risk of damage to the VAV terminal unit!
– Handle the unit with care.
– Do not lift the VAV terminal unit by its control
components, the damper blade or differential
pressure sensor.
– Lift the unit only by lifting the entire casing.
2.1 Delivery check
Check delivered items immediately after arrival for
transport damage and completeness. In case of any
damage or an incomplete shipment, contact the ship-
ping company and your supplier immediately.
2.2 Transport on site
If possible, take the VAV terminal unit in its transport
packaging up to the installation location.
Do not remove the protective wrapping until just
before installation.
2.3 Storage
If the product has to be stored temporarily:
Moisture and lack of ventilation can lead to oxida-
tion, even on galvanised components. Remove any
plastic wrapping in order to avoid oxidation.
Protect the product from dust and contamination.
Store the product in a dry place and away from
direct sunlight.
Do not store the product below -10 °C or above +50
°C.
2.4 Packaging
Properly dispose of packaging material.
Transport, storage and packaging
Packaging
VAV terminal units VARYCONTROL 9

3 Product description
3.1 VAV terminal unit types
3.1.1 Round VAV terminal units, steel
Type Illustration Description
LVC ① Differential pressure sensor (plastic nozzle)
② Damper blade
③ Lip seal
④ Easy controller
⑤ Volume flow rate scale
⑥ Wire clamping bracket
TVE ① Lip seal
② Casing
③ Damper blade with integrated differential
pressure sensor
④ Shaft
⑤ Control components, e.g. a compact con-
troller
TVR ① Differential pressure sensor
② Damper blade
③ Lip seal
④ Control components, e.g. Easy controllers
Product description
VAV terminal unit types > Round VAV terminal units, steel
VAV terminal units VARYCONTROL10

3.1.2 Rounded VAV terminal units, plastic
Type Illustration Description
TVRK ① Differential pressure sensor
② Damper blade
③ Casing
④ Actuator
⑤ Control components, e.g. a Universal con-
troller
TVLK ① Differential pressure sensor (nozzle,
optional)
② Control component, e.g. LABCONTROL con-
troller EASYLAB
③ Casing
④ Actuator
⑤ Differential pressure sensor (bluff body and
sensor tubes)
Product description
VAV terminal unit types > Rounded VAV terminal units, plastic
VAV terminal units VARYCONTROL 11

3.1.3 Rectangular VAV terminal units, steel
Type Illustration Description
TVJ ① Differential pressure sensor
② Damper blade
③ Gear
④ Control components, e.g. Easy controllers
TVT ① Differential pressure sensor
② Damper blade with seal
③ Gear
④ Control components, e.g. Easy controllers
TZ-Silenzio ① Integral sound attenuator
② Differential pressure sensor
③ Control components, e.g. Easy controllers
④ Damper blade with seal
TA-Silenzio ① Integral sound attenuator
② Differential pressure sensor
③ Control components, e.g. Easy controllers
④ Damper blade with seal
Product description
VAV terminal unit types > Rectangular VAV terminal units, steel
VAV terminal units VARYCONTROL12

Type Illustration Description
TVZ ① Differential pressure sensor
② Lip seal
③ Inspection access
④ Damper blade
⑤ Integral sound attenuator
⑥ Control components, e.g. Easy controllers
TVA ① Integral sound attenuator
② Lip seal
③ Damper blade
④ Differential pressure sensor
⑤ Control components, e.g. Easy controllers
TVM ① Damper blade – cold air
② Lip seal
③ Differential pressure sensor – cold air
④ Control components, e.g. compact control-
lers
⑤ Inspection access
⑥ Differential pressure sensor – total air
⑦ Noise insulation
⑧ Damper blade – warm air
Notes for terminal units for duct pressure control
The accessibility of the connections for the differential pressure sensors varies depending on the version of
the VAV terminal unit, and the control components installed.
VAV terminal units intended for duct pressure control require a suitable pressure tapping point in the duct
system to be controlled. In VAV terminal units with control components for duct pressure control, the differen-
tial pressure sensor installed in the VAV terminal unit has no function and is therefore either not accessible or
designed without tubing to the control component.
Product description
VAV terminal unit types > Rectangular VAV terminal units, steel
VAV terminal units VARYCONTROL 13

3.2 Detection of the control compo-
nents
The attached control component can be identified on
the adjustment label of the VAV terminal unit, see
marking Fig. 1 and Fig. 2.
Possible combinations of VAV controller and control
component Ä Chapter 10 ‘Control component/attach-
ments’ on page 31
Fig. 1: Calibration sticker variant 1
Fig. 2: Calibration sticker variant 2
3.3 Position of the damper blade
The position of the damper blade corresponds to the
mark on the axis and is thus recognisable from the out-
side.
Fig. 3: Actuators with positive locking
1 Shaft with marking for position indication
2 Damper blade
Fig. 4: Actuator with traction
1 Shaft with marking for position indication
2 Damper blade
Fig. 5: Actuator on TVE
1 Shaft with marking for position indication
2 Damper blade
Product description
Position of the damper blade
VAV terminal units VARYCONTROL14

4 Installation
4.1 Security
Personnel:
HVAC technician
Protective equipment:
Protective gloves
Safety shoes
Industrial safety helmet
Only specialist personnel are allowed to perform the
described work on the VAV terminal unit.
Only skilled qualified electricians are allowed to work on
the electrical system.
CAUTION!
Danger of injury from sharp edges and sheet
metal parts.
– Always wear protective gloves when handling the
unit.
NOTICE!
Risk of damage to the VAV terminal unit!
– Handle the unit with care.
– Lift the unit only by lifting the entire casing.
– Never lift the unit by its control components, the
damper blade or differential pressure sensor.
4.2 Installation information
Select the installation location for the VAV terminal
unit such that the VAV terminal unit, inspection
accesses and the control components remain
accessible for the following work:
– Wiring
– Adjustment work (service socket if necessary)
– Servicing and maintenance, e.g. to replace con-
trol components, if necessary in several parts
(controllers, transducers, actuators).
For information on space requirements, see product
data sheets.
Observe the air direction arrows on the units.
Do not swap supply and extract air units.
Do not swap over devices that belong together in
command and tracking controls (e.g. supply air and
extract air).
VAV terminal units are only allowed to be installed in
extract air systems in commercial kitchens if the
extract air has already been cleaned with aerosol
separators, see VDI 2052.
4.3 Installation orientation
In the case of terminal units with diaphragm pressure
transducers, the installation orientation of the control
component must be observed; possible installation ori-
entations are indicated on a sticker (Fig. 6) on the ter-
minal unit.
Other installation orientations or relocation of the pres-
sure transducer only after consultation with TROX.
The mounting position is freely selectable for terminal
units without installation orientation stickers.
Fig. 6: Sticker showing installation orientations
Installation orientation OK
Installation orientation not OK
4.4 Direction of airflow
It is imperative that air terminal units are installed in
their intended airflow direction. For this purpose, an air
direction arrow (Fig. 7/1, Fig. 8/1, Fig. 9/1) is attached to
the terminal unit. The air direction arrows are designed
differently depending on the combination of terminal unit
and control component.
Fig. 7: Air direction arrow on the scale sticker for Easy
type control components
Installation
Direction of airflow
VAV terminal units VARYCONTROL 15

Fig. 8: Air direction arrow on the order sticker
Fig. 9: Air direction arrow on the TVLK
Airflow direction control unit TVE
In the case of TVE in combination with a control compo-
nent with a dynamic differential pressure transducer
(Easy, XB0, XM0 (-J6)), the airflow direction is arbitrary.
If Easy, XB0 or XM0(-J6) is listed on the commission
sticker, the airflow direction (Fig. 8/1) specified
there can be ignored.
For the TVE with the Easy control component, this is
indicated by the double arrow (Fig. 10/1) on the scale
label.
Fig. 10: TVE Easy air direction arrow on the scale
sticker
4.5 Upstream conditions
The volume flow rate accuracy of VAV terminal units
applies to a straight upstream section of the duct.
Bends, junctions or a narrowing or widening of the duct
cause turbulence that may affect measurement.
Some terminal units require straight upstream duct sec-
tions which are explained below.
4.5.1 Circular ducting
ATTENTION: Observe air direction arrows on VAV
terminal units during installation
Ä 15
Observe EN 1506 for fittings and bridges, in partic-
ular:
– No sharp-edged bridges
– Slants at reductions and expansions per leg
max. 7.5°
Circular silencers CA/CS/CF (same nominal size)
can be installed directly in front of or behind a VAV
terminal unit.
Circular silencer CB (same nominal size)
– In front of the VAV terminal unit: install at a dis-
tance 1D
– Behind the VAV terminal unit: install at a dis-
tance 1D (acoustic decoupling)
Connection of fire dampers (same nominal size):
– In front of the VAV terminal unit: at a distance 1D
– Behind the VAV terminal unit: without distance,
observe the movement range of the damper
blade.
Installation
Upstream conditions > Circular ducting
VAV terminal units VARYCONTROL16

Upstream conditions with circular ducting
Type Bend Junction
LVC
Ä Fig. 11
– 1
TVE
TVR
Ä Fig. 12
TVZ
TVM
TVRK
TVLK – 1
1) No straight entry flow required
Bend: LVC, TVE, TVR, TVZ, TVM, TVRK, TVLK
Fig. 11: Bend
A bend with a centre line curvature radius of at least
1D – without an additional straight duct section
upstream of the VAV terminal unit – has only a negli-
gible effect on the volume flow rate accuracy.
Junction: TVR, TVZ, TVM, TVRK
Fig. 12: Rounded junction from a main duct
A junction causes strong turbulence. The stated
volume flow rate accuracy can only be achieved with a
straight duct section of at least 5D upstream.
4.5.2 Rectangular ducting
ATTENTION: Observe air direction arrows on VAV
terminal units during installation
Ä 15
Observe EN 1505 for fittings and bridges, in partic-
ular:
– No sharp-edged bridges
– At reductions and expansions: slants max. 7.5°
per leg
Secondary silencer TX can be installed directly
upstream/downstream of the volume flow controller,
non-active section to the volume flow controller,
Fig. 26.
For splitter sound attenuators MSA, XSA, RSA,
keep a distance of 4H in front of the VAV terminal
unit.
Connection of fire dampers (same nominal size):
– In front of the VAV terminal unit: at a distance 4H
– Behind the VAV terminal unit: without distance,
observe the movement range of the damper
blade.
Upstream conditions with rectangular ducting
Type Bend Junction
horiz. vertical horiz. vertical
TVJ Ä
Fig. 13 Ä Fig. 14 Ä Fig. 16 Ä Fig. 17
TVT
TZ-
Silenzio
Ä Fig. 15
Ä Fig. 18
TA-
Silenzio Ä Fig. 19
TVA Ä Fig. 18 / Fig. 19
Installation
Upstream conditions > Rectangular ducting
VAV terminal units VARYCONTROL 17

Bend in horizontal ducting: TVJ, TVT
Fig. 13: Horizontal bend connection (view from
above)
A bend – with a straight duct section of at least 3B
upstream of the VAV terminal unit – has only a negli-
gible effect on the volume flow rate accuracy.
Bend in vertical ducting: TVJ, TVT
Fig. 14: Vertical bend connection (view from the side)
A bend – with a straight duct section of at least 4H
upstream of the VAV terminal unit – has only a negli-
gible effect on the volume flow rate accuracy.
Bend: TZ-/TA-Silenzio, TVA
Fig. 15: Bend connection, vertical or horizontal
A bend – without a straight duct section upstream of
the VAV terminal unit – has only a negligible effect on
the volume flow rate accuracy
Junction from horizontal main duct: TVJ, TVT
Fig. 16: Junction from a horizontal main duct (view
from above)
A junction causes strong turbulence. The stated
volume flow rate accuracy can only be achieved with a
straight duct section of at least 3B upstream.
Junction from vertical main duct: TVJ, TVT
Fig. 17: Junction from a vertical main duct (view from
the side)
A junction causes strong turbulence. The stated
volume flow rate accuracy can only be achieved with a
straight duct section of at least 4H upstream.
Junction: TZ-Silenzio
Fig. 18: Junction from a main duct, vertical or hori-
zontal
The stated volume flow rate accuracy is achieved even
with a direct connection to the junction of a main duct.
Installation
Upstream conditions > Rectangular ducting
VAV terminal units VARYCONTROL18

Junction: TA-Silenzio, TVA
Fig. 19: Convergence of two airflows
The stated volume flow rate accuracy will be achieved
even when the VAV terminal unit is connected at a
junction and at the point of convergence of two air-
flows.
4.6 Affixing/suspension
4.6.1 General information
When designing and constructing ventilation and air
conditioning systems, take into account the require-
ments of VDI 6022, in particular:
– Hygienic, clean installation of all components
and their air distribution surfaces
– Inspection and cleaning options for VAV terminal
units, e.g. by planning inspection/cleaning open-
ings in the ducting system
– Avoidance of leaks
Affix the unit proficiently and only to load-bearing
components.
Load suspension systems only with the weight of
the unit. Adjacent components and connecting ducts
must be supported separately.
Only use approved and sufficiently dimensioned
suspensions for affixing. Secure screw connections
against self-loosening, e. g. by locking them. Affixing
material is not included in the supply package.
Only use the shortest possible drilling screws for
affixing; these must not be screwed into the area of
the damper blade or differential pressure sensor.
4.6.2 Rounded units
Fig. 20: Installation example TVR-*
1 Terminal unit, rounded, e. g. TVR
2 Air direction arrow e. g. on the scale sticker
3 Drilling screw for affixing to the ducting
4 Clamp
5 Suspension, e. g. with threaded rod
Fig. 21: Examples of fixings for rounded units
1 Affixing to pipe clamps
2 Affixing to suspension element
Installation
Affixing/suspension > Rounded units
VAV terminal units VARYCONTROL 19

4.6.3 Rectangular units
Fig. 22: Installation example directly on the terminal unit
1 Terminal unit, rectangular, e. g. TVZ
2 Air direction arrow e. g. on the order sticker
3 Suspension, e. g. with threaded rod
4 Nut, with locknut
5 Duct, rectangular
6 Drilling screw for affixing to the ducting
7 Duct, circular
Fig. 23: Installation example suspension on ducting
1 Terminal unit, rectangular, e. g. TVJ
2 Suspension, e. g. with U-channel, threaded rod nuts
with locknuts
3 Duct, rectangular
4 Affixing the duct to the terminal unit
Fig. 24: Examples of fixings for rectangular units
1 Affixing to existing drilled holes (only for TVM, TVZ,
TVA, TZ-/TA-Silenzio)
2 Affixing to duct bracket (L-bracket)
3 Affixing with bracket or U-channel
4 Affixing to duct bracket (Z-bracket)
4.6.4 Installation of secondary silencer
Secondary silencers are supplied separately and must
be mounted directly on the VAV terminal unit at the
installation location. Suspend sound attenuator sepa-
rately.
Secondary silencer TX
To optimise acoustics and flow, the TX sound attenuator
has an empty chamber. When mounting, observe the
arrangement of the empty chamber depending on the
installation location of the sound attenuator (in front of
or behind the terminal unit in air direction).
Fig. 25: Installation of sound attenuator TX H > 100 mm
1 VAV terminal unit TVJ-* / TVT-*
2 Sound attenuator TX
3 Splitter
4 Air terminal device (room end)
Installation
Affixing/suspension > Installation of secondary silencer
VAV terminal units VARYCONTROL20