ViM UTBS ECOWATT 2 User manual

NT00000849-UTBS-ECOWATT-AN-230623
INSTRUCTION MANUAL
INSTALLATION | WIRING | COMMISSIONING | MAINTENANCE |
AFNOR CERTIFICATION
ISO 14001
Environnement
AFNOR CERTIFICATION
ISO 9001
Qualité
UTBS ECOWATT®
Single ow air handling unit (AHU)
Compact unit for false ceiling

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SOMMAIRE
1. GENERALS........................................................................................................................................ 3
1.1 Warnings .................................................................................................................................. 3
1.2 Safety instructions .................................................................................................................... 3
1.3 Reception – Storage................................................................................................................. 4
1.4 Warranty ................................................................................................................................... 4
2. PRODUCT RANGE PRESENTATION................................................................................................ 4
2.1 Range....................................................................................................................................... 4
2.2 Main components ..................................................................................................................... 6
3. INSTALLATION .................................................................................................................................. 6
3.1 Machine identication............................................................................................................... 6
3.2 Dimensions and weights........................................................................................................... 6
3.3 Handling and lifting................................................................................................................. 13
3.4 Location and mounting ........................................................................................................... 13
3.5 Fitting accessories.................................................................................................................. 15
4. HYDRAULIC AND FLUID CONNECTION ....................................................................................... 18
4.1 Connecting the water coils ..................................................................................................... 18
4.2 Connection of direct expansion coils (DX).............................................................................. 18
4.3 Condensate drain ................................................................................................................... 20
5. AIR DUCT CONNECTION................................................................................................................ 20
5.1 Duct connection...................................................................................................................... 20
6. ELECTRICAL CONNECTIONS AND FEATURES........................................................................... 21
6.1 Electrical connections............................................................................................................. 21
6.2 Electrical features................................................................................................................... 21
6.3 Power connection................................................................................................................. 22
7. COMMISSIONING............................................................................................................................ 23
7.1 Factory settings of AHU.......................................................................................................... 23
7.2 Factory control of air handling units........................................................................................ 23
7.3 Recommendations.................................................................................................................. 23
8. MAINTENANCE - REPLACEMENT OF PARTS.............................................................................. 24
8.1 Safety instructions .................................................................................................................. 24
8.2 Maintenance frequency .......................................................................................................... 24
8.3 Maintenance / replacement of fresh air lters......................................................................... 25
8.4 Maintenance / resetting / replacing the electrical heater ........................................................ 26
8.5 Maintenance / replacement of the water coil.......................................................................... 27
8.6 List of main spare parts .......................................................................................................... 27
9. WASTE MANAGEMENT.................................................................................................................. 27
9.1 Treatment of Packaging and non-hazardous waste ............................................................... 27
9.2 Treatment of Professional WEEE........................................................................................... 27

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1. GENERALS
1.1 Warnings
This product has been manufactured in compliance with rigorous technical safety rules, according to CE stan-
dards. The CE declaration, and the manual, can be downloaded from the website www.vim.fr.
Before installing and using this product, carefully read these instructions which contain important infor-
mation for your safety and that of users during the installation, commissioning and maintenance of this
product.
Once installation is complete, leave this manual in the machine for future reference.
The installation of this product (implementation, connections, commissioning, maintenance) and all other
interventions must be carried out by a professional applying the rules of the art, the standards and the
safety regulations in force.
It must comply with the requirements relating to Electro Magnetic Compatibility and the Low Voltage Di-
rective.
The manufacturer's liability shall not be engaged for any injury and/or material damage caused when the
safety instructions have not been respected or following a modication of the product.
UTBS ECOWATT
®
single-ow units are intended for single-ow ventilation and air treatment applications
in kitchens or tertiary buildings.
Indoor (recommended) or outdoor installation:
• Maximum permanent environment temperature: -20°C / +40°C.
• To avoid any damage to the electronic components (very low temperature, condensation) the safety
switch located on the front panel must be kept in the “ON” position, except during maintenance pe-
riods.
• Relative humidity: max. 95% without condensation.
• Non-potentially explosive atmosphere.
•Low salinity atmosphere, free from corrosive chemical agents.
1.2 Safety instructions
General
• Meaning of the danger labels on the access doors:
Live equipment Rotating machine Potentially ammable dusty lters
• Put on appropriate PPE (Personal Protective Equipment) before any intervention.
• Before installing the air handling unit, ensure that the support and location are strong enough to
support the weight of the unit and accessories.
• Do not open doors or panels without shutting down the unit.
Case of emergency or danger
• Switch o󰀨 the power supply using the lockable disconnect switch and, if possible, the main circuit breaker.
AHU normal shutdown procedure
• Switch o󰀨 the power supply using the lockable disconnect switch and, if possible, the main circuit breaker.
• Make sure that moving parts are stationary.
Before starting, check the following points:
• Check the earth connection.
• Check that the access doors are properly closed.

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Tripping of safety thermostats (EI model)
• UTBS ECOWATT® are equipped with 2 safety switch thermostats:
-A manual reset thermostat switches off the heater at 85°C.
-An automatic reset thermostat switches off the heater at 60°C.
• Any resetting or tripping information (via the BMS for example) involves looking for the cause of this
triggering on the AHU and on the installation. Contact [email protected].
1.3 Reception – Storage
In the event of lack, non-compliance, total or partial damage to the products delivered, the Buyer must, in
accordance with article 133-3 of the Commercial Code, issue written reservations on the carrier's receipt and
conrm them in 72 hours by sending a registered letter to the transporter and a copy to the manufacturer.
The receipt without reservation of the equipment deprives the Buyer of any further recourse against us.
The product must be stored away from bad weather, shocks and dirt due to projections of any kind during its
transport from the supplier to the end customer, and on the site before installation.
1.4 Warranty
The equipment is guaranteed for 24 months from the invoice date. The warranty is limited to the replace-
ment of parts or equipment whose operation is recognized as defective by the manufacturer, excluding
any compensation or penalties. The costs of labor, removal and rest, travel related to the replacement are
the responsibility of the Customer. Excluded from our warranty are defects linked to abnormal use or not
in accordance with the recommendations in our instructions, defects observed as a result of normal wear
and tear, incidents caused by negligence, lack of monitoring or maintenance, defects due to incorrect ins-
tallation of devices or poor storage conditions prior to assembly.
In any case, manufacturer is not responsible for transformed material, even partially repaired.
2. PRODUCT RANGE PRESENTATION
2.1 Range
Use:
• Introduction of fresh air, heating and air conditioning.
• Indoor or outdoor installation.
• Floor or ceiling mounting, or vertical see § "3.4 Location and mounting", page 13.
4 sizes:
UTBS ECOWATT® 2 (2,000 m3/h), UTBS ECOWATT® 3 (3,000 m3/h), UTBS ECOWATT® 5 (5,000 m3/h),
UTBS ECOWATT® 8 (8,000 m3/h),
Congurations according to the types of built-in coils or heater:
• UTBS ECOWATT®EI : integrated electric heater.
• UTBS ECOWATT®EC : integrated hot water coil.
• UTBS ECOWATT®ER : integrated reversible water coil.
• UTBS ECOWATT®ECF : integrated hot water coil + cold water coil.
• UTBS ECOWATT®EIF : integrated electric heater + cold water coil.
• UTBS ECOWATT®EX : integrated direct expansion coil.
Upward vertical air ow mounting possible for versions with hot water coil or electrical heater.
4 constructions - rectangular line connection:
• UTBS ECOWATT®D : indoor installation - Right hand side access
• UTBS ECOWATT®G : indoor installation - Left hand side access
• UTBS ECOWATT®EXD : outdoor installation with mounted roof - Right hand side access
• UTBS ECOWATT®EXG : outdoor installation with mounted roof - Left hand side access

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Self-supporting structure in 25 mm double skin panels.
• Insulation by mineral rock wool th. 25 mm, density 40 kg/m3.
• Thermal conductivity 0.037 W/(mk) (20/80°C).
A1 re classication according to standard EN 13 501.1.
Interior nishing in Z275 galvanized steel and exterior nishing in pre-painted steel, C5 corrosion resistant.
Access from the side and/or bottom panels.
Possibility of adding a base frame (accessory).
Accessories
VF
UTBS
Caisson de
Mélange
IDJF
ID
JF
VF
ID JF
ID
JF
VF ou VL
Caisson
Silencieux
Caisson
Plénum
TPP
Châssis
Caisson
Plénum
ID
JF
VF ou VL
TPP TPP
ID JF
VF ou VL
ID JF
VF ou VL
Base frame
VF or VL
Mixing
module
Plenum
module Plenum
module
Silencer
module
VF or VL VF or VL
VF or VL
TPP Roof VF / VL Front and side rain
protection
BBase frame CM 2-way mixing module
PB Plenum module JF Flexible rectangular
connection M0
SIL Silencer module
VTVS
VDVP 2-way or 3-way constant
pressure valves
ID + actuator
(accessory)
Motorizable rectangular
damper.
Air inlet mounting to
ensure frost protection
coil, or air outlet
mounting
SIPH Standard siphon to
prevent pipe odors
Accessories dimensions on page 10.

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2.2 Main components
ECF models
Pré-ltre
SECTION
FILTRES
SECTION
BATTERIES
SECTION
VENTILATEURS
Filtre nal
Raccord d’entrée de câblage
Panneau de commandeSystème de serrage de ltres Sortie condensatsBatteries
Séparateur de gouttelettesDétecteur d’encrassement des ltres
FILTERS
SECTION
Pre-lter
Filter clamping system Coils Condensate drain Control Panel
Wiring entry
Final lter Filter pressure switch Droplet separator
COILS
SECTION
FANS
SECTION
3. INSTALLATION
3.1 Machine identication
Identication label stuck on the
panel of the fan box.
3.2 Dimensions and weights
Conguration 1* Conguration 2* Conguration 3 Conguration 4
M5
M5F
EC2 ou EC4FM5
EC2 or EC4
ER4 ou ER6
EX4 ou EX6 M5F
ER4 or ER6
EX4 or EX6
Conguration 5 Conguration 6 Conguration 7
EF4 ou EF6 EC2 M5F
EF4 or EF6
EI M5FEF4 ou EF6
EF4 or EF6
FM5EI
EC2
2 rows heating coil
EC4
4 rows heating coil
EF4/ER4
4 rows cooling coil / or reversible
EF6/ER6
4 rows cooling coil / or reversible
EX4
4 rows direct expansion coil
EX6
6 rows direct expansion coil
EI
Electrical heater
M5
FIFI M5 ePM10 50% lter
F
FIFI F7 or FIFI F9 lter location

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Conguration 1 and 2
A
C
E
G
D
B
H
Dimensions (mm) and Weight (Kg) Conguration 1 Conguration 2
Size A B C D E G H Weight G H Weight
2750 360 690 300 790 690 750 53 909 969 63
31 100 410 1 040 350 1 140 690 750 86 909 969 96
51 500 410 1 440 350 1 540 690 750 110 909 969 125
81 900 500 1 840 440 1 940 690 750 135 909 969 155

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Conguration 3
B
1454
A
C
E
1394
D
J
80586
Conguration 4
3/4"
B
1454
A
C
E
1394
D
587 K
J
722,5
Dimensions (mm) and Weight (Kg) Cong. 3 Cong. 4
Size A B C D E J K 2-4 rows /
6 rows Connection (")
water coil Weights
2 rows /
4 rows
Weight
4 rows /
6 rows
2750 360 690 300 790 215 80 / 120 1-1/4" 112 / 115 120 / 122
31 100 410 1 040 350 1 140 265 80 / 120 1-1/4" 158 / 168 174 / 179
51 500 410 1 440 350 1 540 265 80 / 120 1-1/4" 208 / 224 228 / 236
81 900 500 1 840 440 1 940 330 80 / 120 1-1/2" 258 / 270 283 / 293

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Conguration 5
3/4"
B
1454
A
C
E
1394
D
586 80
J
K
723,5
Conguration 6
3/4"
B
1454
A
C
E
1394
D
723
687 K
Dimensions (mm) and Weight (Kg) Cong. 5 Cong. 6
Size A B C D E J K 2-4 rows /
6 rows Connection (")
water coil Weights BF
4 rows /
6 rows
Weights
4 rows /
6 rows
2750 360 690 300 790 215 80 / 120 1-1/4" 144 / 146 133 / 135
31 100 410 1 040 350 1 140 265 80 / 120 1-1/4" 206 / 211 195 / 200
51 500 410 1 440 350 1 540 265 80 / 120 1-1/4" 271 / 279 257 / 265
81 900 500 1 840 440 1 940 330 80 / 120 1-1/2" 336 / 346 321 / 331

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Conguration 7
B
1205 A
C
E
1145
D
Dimensions (mm) and Weight (Kg) Cong. 7
Size A B C D E Weight
2750 360 690 300 790 86
31 100 410 1 040 350 1 140 132
51 500 410 1 440 350 1 540 174
81 900 500 1 840 440 1 940 218
Accessories
Connection anges
A
B
UTBS size A B
2300 690
3350 1040
5350 1440
8400 1840
CM - 2-way mixing modules
2MA 2MB UTBS
size 2MA* 2MB - 2MD - 2ME
Weight (kg) Length Weight (kg) Length
222 360 39 750
331 410 52 750
544 410 106 1205
2MD 2ME 868 500 137 1205
* Other register positions: contact us

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PB - Plenum module for horizontal installations
750
UTBS size Total weight (kg)
216
325
532
849
PB-V ET PB-VR - Plenum modules with grille for vertical installations
C
A
D
B
UTBS
size A B C D
2
750 360 360 822
3
1100 410 410 1172
5
1500 410 410 1572
8
1900 500 500 1972
SIL - Silencer module
Longueur
Lenght UTBS
size
Length 750 mm
Ba󰀪es 600 mm
Number of Ba󰀪es Total weight (kg)
2
2 34
3
3 49
5
4 65
85 87
ID - Supply / extraction damper
l
h2020
30 30 e
h2020
UTBS
size Frontal - Upper (w x h) Lateral (w x h) e
2
410 x 210 410 x 210 80
3
810 x 210 460 x 210 80
5
1 200 x 210 900 x 210 130
8
1 600 x 310 900 x 310 130
JF - Flexible connections
21 A2121
130
maxi
B
2110 10
10
10
9
UTBS
size Kind A B Weight (Kg)
2
Module
650 250 3,0
3
1000 300 4,0
5
1400 300 5,0
8
1800 400 6,0
2
Frontal
or upper
register
410 210 2,0
3
810 210 3,5
5
1200 210 4,0
8
1600 310 5,5
2
Side
register
410 210 2,0
3
460 210 2,0
5
900 210 3,5
8
900 310 4,5
VL-VF - Rain cover for front and side dampers
A
B
C
Size A B C
VF T2 650 300 250
VL T2 650 300 250
VF T3 1000 350 250
VL T3 650 350 250
VF T5 1400 350 250
VL T5 1100 350 250
VF T8 1800 440 300
VL T8 1100 440 300
VF: Front damper cover - VL: Side damper cover

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TM - Antivibration suspension
75
11
100
UTBS
size Designation Nb per module Rated load (kg) Elongation (mm)
2TM-50 450 21-27
3TM-50 450 21-27
5TM-75 475 21-27
8TM-100 4 100 21-27
Fixing bracket
75
110
75
110
Ø12
Base frame
80
A
B
UTBS
size Use cases A B
22MA 821 362
22MB-D-E SIL Cong. 1 821 752
2Cong. 2 821 971
2Cong. 7 821 1 207
2Cong. 3-4-5-6 821 1 456
32MA 1 171 362
32MB-D-E SIL Cong. 1 1 171 752
3Cong. 2 1 171 971
3Cong. 7 1 171 1 207
3Cong. 3-4-5-6 1 171 1 456
52MA 1 571 362
52MB-D-E SIL Cong. 1 1 571 752
5Cong. 2 1 571 971
5Cong. 7 1 571 1 207
5Cong. 3-4-5-6 1 571 1 456
82MA 1 971 362
82MB-D-E SIL Cong. 1 1 971 752
8Cong. 2 1 971 971
8Cong. 7 1 971 1 207
8Cong. 3-4-5-6 1 971 1 456
TPP - Roof
A
B
68
C
UTBS
size Conguration A B C
2Cong. 1 910 750 100
2Cong. 2 910 969 100
2Cong. 3/4/5/6 910 1454 100
2Cong. 7 910 1205 100
3Cong. 1 1260 750 112
3Cong. 2 1260 969 112
3Cong. 3/4/5/6 1260 1454 112
3Cong. 7 1260 1205 112
5Cong. 1 1660 750 126
5Cong. 2 1660 969 126
5Cong. 3/4/5/6 1660 1454 126
5Cong. 7 1660 1205 126
8Cong. 1 2060 750 140
8Cong. 2 2060 969 140
8Cong. 3/4/5/6 2060 1454 140
8Cong. 7 2060 1205 140

13/28 NT00000849-UTBS-ECOWATT-AN-230623
3.3 Handling and lifting
I mini
I
The units are delivered screwed onto pallets made to
the dimensions of the box.
The handling of UTBS ECOWATT
®
air handling units
can be done by pallet truck, forklift or crane. The
handling equipment will be adapted to the load and the
lifting conditions.
In all cases, the lifting will be done at the base of the
device xed on a pallet.
The device should be handled with care and only in a
horizontal position.
3.4 Location and mounting
Location
UTBS ECOWATT® AHUs must be xed to a at, smooth surface capable of supporting the weight of the
unit in operation and its accessories. The EXD and EXG models are intended for installation outside the
premises.
The air handling unit must be xed by the brackets provided for this purpose. Mounting on anti-vibration
compression or suspension mounts and with exible connections is recommended.
Di󰀨erent mounting
A
Sol
C
DB
Attention :
• For electric heater version (EI), only positions A, B and
C are possible.
• For cold water and reversible coil version (EF, ECF,
ER), only positions A and C are possible.
• For hot water coil version (EC), positions A, B, C, D and
E (bottom xed to the wall) are possible.
For the installation of a unit with vertical air ow (version B or D), the unit must be xed to the wall so that
the accessory casing under the unit (if present) does not support the entire weight of the unit.
No obstacle must hinder or prevent the good circulation of supply and extract air.

14/28 NT00000849-UTBS-ECOWATT-AN-230623
Access for maintenance
UTBS ECOWATT® AHUs can be ordered with dampers and right hand/left hand connections (depending
on the air ow direction).
Access to the lters can be done by their side panel or the lower or upper panels depending on the as-
sembly of the unit.
Access to the electrical box is made from the side panel.
To remove the coil or heater, it is necessary to remove the side panel and slide the coil or heater until it is
completely extracted from the unit.
Ve
rsions G
Servitudes à gauche
Ve
rsions D
Servitudes à droite
Accès aux ltres, panneau de contrôl
e
et raccordements batterie d’eau
(lorsqu’elle existe)
Accès aux ltres et moteurs
Accès au moteurs
H
AWB
AW B
H
G-Versions
Connexions on the left side
D-Versions
Connexions on the right side
Access to lters, control panel and
water coil connections
Access to lters and motors
Access to motors
Size W H A B
2750 360 500 850
31100 410 500 1200
41500 410 500 1600
81900 500 500 2000
Mounting
To x the air handling unit to the ceiling, use the four corner brackets provided for this purpose on each
module, as shown in the diagram below:
Ceiling mounting Floor mounting
UTBS
OK
OK Châssis
OK
AUTBS
Frame

15/28 NT00000849-UTBS-ECOWATT-AN-230623
To avoid the transmission of engine vibrations to the building, it is necessary to install anti-vibration
mounts at each xing point. Use the anti-vibration kits recommended in the following table:
UTBS size Anti-vibration suspension Quantity per UTBS Rated load (kg) Deection
(mm)
2PTMZ 50 Spring suspension 50Kg 4 50 21-27
3PTMZ 50 Spring suspension 50Kg 4 50 21-27
4PTMZ 75 Spring suspension 75Kg 4 75 21-27
8PTMZ 100 Spring suspension 100Kg 4 100 21-27
WARNING ! Due to the length and weight of the devices, hang each module separately.
3.5 Fitting accessories
Antivibratiles
Manchette
souple
Silencieux
UTBS
Servomoteur
Visière
Registre
Flexible
connection
Silencer
Actuator
Register
Cover
UTBS
size Flexible connection Silencer Anti-vibration support (4 units) Cover Register 24V actuator
2JF-UTBS 650x250 SIL-2 750 PTMZ 50 VF UTBS-2 ID 2
LF 24 S
3JF-UTBS 1000x300 SIL-3 750 PTMZ 50 VF UTBS-3 ID 3
4JF-UTBS 1400x300 SIL-5 750 PTMZ 75 VF UTBS-5 ID 5
8JF-UTBS 1800x400 SIL-8 750 PTMZ 100 VF UTBS-8 ID 8
Joint d’étanchéité
Équerres d’angle
Boulon M8
Corner brackets
M8 bolt
Gasket
The angle brackets are used to join the di󰀨erent modules
together. If the device is made up of several modules, a
connection kit, consisting of 4 bolts and a seal, is supplied
with the module added to the main module.

16/28 NT00000849-UTBS-ECOWATT-AN-230623
3.5.1 Damper and cover
The ID registers must be xed with the screws provided in
the frame of the UTBS.
The cover must be xed with the self-drilling screws
provided on the frame of the UTBS.
If there is an ID damper, unscrew the damper xing screws,
overlap the cover and reinstall the screws.
Access to the actuator is via the side cover.
3.5.2 Flanges
UTBS module are delivered with anges mounted. Remove the ange on the side where the accessory module
will be mounted.
On the accessory module, mount the ange that was
previously removed from the UTBS module.
The result is an assembly of two modules with inlet and
outlet anges:
- Silencer with inlet ange
- UTBS module with outlet ange
3.5.3 Additional lters
The device is supplied with an internally mounted FIFI M5 ePM10 55% lter.
• A second stage of FIFI F7 ePM1 75% or F9 ePM1 85% lter is available as an option (except con-
guration 1: 750mm long module).
See chapter “Replacing the lter” for more information on how to access the lter section.

17/28 NT00000849-UTBS-ECOWATT-AN-230623
3.5.4 Flexible connexions
Trous de xation pour
montage sur volets ou
autres modules.
Fixing holes for
mounting on shutters
or other mods
Flexible connexions must be tted to the inlet or outlet of
the module.
They are delivered separately unassembled.
3.5.5 Mixing module
The mixing module must be mounted at the air inlet of AHU and allows fresh outside air to be mixed with
recycled air thanks to registers placed on each air intake.
The mixing module and actuators are supplied as
accessories.
• Mount the mixing module using the screws provided.
• Mounting the actuators on the axes of the registers.
• If it is necessary to reverse the direction of rotation, turn
the selector on the actuator.
3.5.6 Antifrost register
To isolate the device from the duct network at each shutdown, it is possible to t a damper at the
air inlet:
The antifrost damper and the actuator are supplied as
accessories.
• Mount the damper using the screws provided.
• Mount the actuator on the damper shaft and make
the electrical connection as indicated in "6.1 Electrical
connections", page 21.
• Check that the direction of rotation of the actuator is
correct (when the device is stopped, the damper must be
closed).
• If it is necessary to reverse the direction of rotation, turn
the selector on the actuator.

18/28 NT00000849-UTBS-ECOWATT-AN-230623
4. HYDRAULIC AND FLUID CONNECTION
4.1 Connecting the water coils
• Maximum allowable pressure: 10 bar
• Maximum temperature: 100ºC
• Minimum temperature: -20ºC with the appropriate mixture of antifreeze
The hydraulic characteristics of the unit are specic to your installation and are determined by the compu-
ter selection: Water pressure drop / Water ow. Refer to the selection to size the valve, accessories, pump.
Water coil
connection on the left Water coil connection on the right Symbols
Batterie Eau à droite
Batterie Eau à Gauche
Entrée d'eau
Sens de l’air
Sens de l’air
Sortie d'eau
Entrée d'eau
Sortie d'eau
Air ow
Water inlet
Water outlet
Batterie Eau à droite
Batterie Eau à Gauche
Entrée d'eau
Sens de l’air
Sens de l’air
Sortie d'eau
Entrée d'eau
Sortie d'eau
Air ow
Water outlet
Water inlet
504423-OUT
504423-OUT
504423-IN
504423-IN
504423-Etiquette-Marquage-batteries-eau-190114
2 modèles - Format 50 x 50 mm
Pantone 108
Noir 100%
Water outlet Water inlet
The connection of the piping to the coil must not impose any mechani-
cal, vibratory or thermal constraints (expansion).
While tightening onto the coil thread, hold the tubing on the opposite
direction, using for example a pin spanner, to prevent damage to the
tubes by twisting.
Respect the direction of water inlet and outlet indicated on the labels xed
to the coils panel. Water and air ow directions should be opposite for
maximum thermal performance.
Model Thread
UTBS-2 (2, 4 or 6 rows) 1-1/4”
UTBS-3 (2, 4 or 6 rows) 1-1/4”
UTBS-5 (2, 4 or 6 rows) 1-1/4”
UTBS-8 (2, 4 or 6 rows) 1-1/2”
4.2 Connection of direct expansion coils (DX)
Coil specications
4 rows DX coils
For applications with 100% recirculated air
UTBS size Volume
(l) Number of circuit Ø liquid distributor Ø manifold gas Cooling power (kW) Heating power (kW) Air ow (m
3
/h)
21,2 11/2" (13mm) 3/4" (19mm) 4,6 4,9 1 250
32,21 15/8" (16mm) 3/4" (19mm) 8,8 8,0 2 500
52,41 15/8" (16mm) 3/4" (19mm) 10,9 10,0 3 500
84,4 15/8" (16mm) 3/4" (19mm) 19,9 17,2 6 000

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6 rows DX coils
For applications with 100% recirculated air
UTBS size Volume (l) Number of
circuit Ø liquid distributor Ø manifold gas Cooling power (kW) Heatinf power (kW) Air ow (m
3
/h)
22 1 5/8" (16mm) 3/4" (19mm) 10,0 10,5 1 250
33,31 15/8" (16mm) 3/4" (19mm) 19,4 19,9 2 500
54,3 15/8" (16mm) 7/8" (22mm) 26,6 27,6 3 500
88,4 22x5/8"
(16mm) 2x7/8" (22mm) 47,8 49,8 6 000
Installation recommendations
On units incorporating direct expansion coils, the following installation recommendations must be followed:
• Secure the installation ducts in such a way that rigidity and stability are ensured, if necessary by
using expansion joints and anti-vibration elements. It is necessary that any transmission of vibration
and stress on the collector and the distributor be avoided.
• When installing the refrigeration system, leave enough space to carry out the operations of mainte-
nance and upkeep rations.
• The liquid connection must be made on the manifold with the smallest diameter (recognizable as
connected to the distributor), while the gas line must be connected to the outlet duct with the largest
diameter.
Manifold
Main outlet duct
Liquid connection
Gas connection
• The achievement of the installation must be carried out by qualied personnel with specic training
in refrigeration techniques (installers approved for the handling of refrigerant gases). Pay particular
attention to:
-The evaporator coil is supplied with sealed ends, without refrigerant charge or nitrogen charge.
-The refrigeration circuit used in the installation must be made of dehydrated copper suitable for use in
cooling circuits.
-Before filling with gas, the refrigeration installation must be cleaned, dehydrated and deoxidized.
-The coil collector and distributor must be properly insulated during welding.
-The circuit must be equipped with the right accessories to ensure the proper functioning of the thermody-
namic cycle (condensing unit, expansion valve, operating control kit, filter, filter-dehydrator, sight glass, etc.).
We recommend that the layout of the refrigerant pipes allow a uid speed greater than 2.6 m/s in a hori-
zontal pipe and greater than 5.2 m/s in a vertical pipe, so as to ensure the return of oil to the compressor.

20/28 NT00000849-UTBS-ECOWATT-AN-230623
4.3 Condensate drain
It is essential to install a siphon with a di󰀨erence in level greater than the available pressure of the fan (in
mm CE) so that the condensate drains from the tray are done correctly.
L
==
mm.c. H2O
The drainage network must provide a minimum slope of
approximately 2%.
5. AIR DUCT CONNECTION
5.1 Duct connection
Ducts must not exert any mechanical stress on the unit. At the inlet (if it is sheathed) provide a straight
distance without variation in section or bend equal to one equivalent diameter.
When mounting outdoors and in order to limit water inltration inside the unit:
• Install a duct at the air inlet, lenght equal to one equivalent diameter.
• Avoid, as far as possible, having air intake on the side of the prevailing winds.
• Install a rain cover if necessary.
Check that the fan motor is not accessible from the connection branches (protection by the connection
duct or a meshed air intake).
Depending on the conguration of the installation and the sound level required, it may be necessary to add
a silencer to the air supply.
Take the greatest care in sealing the duct network over all their lengths, from the inlets to the outlets.
The fresh air duct must always be insulated to avoid losses and the risk of condensation. The level of in-
sulation, particularly in cold rooms and regions, must be reinforced.
Specic recommendations for UTBS EI with electric heaters
Supply air:
Provide a straight distance without variation in section or bend equal to twice the equivalent diameter.
Do not use a sudden rectangular to circular transformation part after an electric heater or a cold water coil.