AIR-TRANSFER ATVUT 180 P5 User manual

ATVUT 180 P5
ATVUE 180 P5
ATVUT 180 P5 EC
ATVUE 180 P5 EC
ATVUT 180 P5 B EC
ATVUE 180 P5 B EC
Air handling unit
USER’S MANUAL

2
ATVUT/ATVUE 180 P5(B)
(EC)
CONTENTS
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
Themanualcontainsinformationaboutpurpose, technical details, operating principle,design,andinstallationofthe ATVUT/
ATVUE 180 P5(B) (EC) unit and all its modifications.
Technical and maintenance staffmust have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.
Safety requirements..................................................................................................................................................................... 3
Purpose................................................................................................................................................................................................ 5
Delivery set........................................................................................................................................................................................ 5
Designation key.............................................................................................................................................................................. 5
Technical data.................................................................................................................................................................................. 6
Design and operating logic .................................................................................................................................................... 7
Mounting and set-up.................................................................................................................................................................. 9
Connection to power mains .................................................................................................................................................. 13
Technical maintenance.............................................................................................................................................................. 15
Storage and transportation regulations.......................................................................................................................... 17
Manufacturer’s warranty........................................................................................................................................................... 18
Certificate of acceptance ........................................................................................................................................................ 19
Seller information.......................................................................................................................................................................... 19
Installation certificate.................................................................................................................................................................. 19
Warranty card ................................................................................................................................................................................. 19
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SAFETY REQUIREMENTS
All user’s manual requirements as well as the provisions of all the applicable local and national
construction, electrical, and technical norms and standards must be observed when installing
and operating the unit.
Disconnect the unit from the power supply prior to any connection, servicing, maintenance, and
repair operations.
Only qualied electricians with a work permit for electrical units up to 1000 V are
allowed for installation. The present user’s manual should be carefully read before
beginning works.
Check the unit for any visible damage of the impeller, the casing, and the grille before starting
installation. The casing internals must be free of any foreign objects that can damage the
impeller blades.
While mounting the unit, avoid compression of the casing! Deformation of the casing may result
in motor jam and excessive noise.
Misuse of the unit and any unauthorised modifications are not allowed.
Do not expose the unit to adverse atmospheric agents (rain, sun, etc.).
Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous
materials.
Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
Do not close or block the intake or extract vents in order to ensure the efficient air flow.
Do not sit on the unit and do not put objects on it.
The information in this user’s manual was correct at the time of the document’s preparation.
The Company reserves the right to modify the technical characteristics, design, or configuration
of its products at any time in order to incorporate the latest technological developments.
Never touch the unit with wet or damp hands.
Never touch the unit when barefoot.
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ATVUT/ATVUE 180 P5( B) (EC)
THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.
This unit is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the unit by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the unit.
Ensure that the unit is switched offfrom the supply mains before removing the guard.
Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.
Connection to the mains must be made through a disconnecting device, which is integrated
into the fixed wiring system in accordance with the wiring rules for design of electrical units,
and has a contact separation in all poles that allows for full disconnection under overvoltage
category III conditions.
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The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafes, conference halls, and other utility
and public spaces as well as to recover the heat energy contained in the air extracted from the premises to warm up the filtered stream
of intake air.
The unit is not intended for organizing ventilation in swimming pools, saunas, greenhouses, summer gardens, and other spaces with
high humidity.
Due to the ability to save heating energy by means of energy recovery, the unit is an important element of energy-efficient premises.
The unit is a component part and is not designed for stand-alone operation. It is rated for continuous operation.
Transported air must not contain any flammable or explosive mixtures, evaporation of chemicals, sticky substances, fibrous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust,
pathogenic germs).
DELIVERY SET
NAME NUMBER
Air handling unit 1 pc.
User’s manual 1 pc.
Control panel user’s manual* 1 pc.
Control panel * 1 pc.
Installation kit 1 pc.
Packing box 1 pc.
*Control panel is not included in the delivery set of the units equipped with an AT21 controller.
DESIGNATION KEY
180ATVUT P 5 B EC
Motor type
– asynchronous
EC - electronically commutated
Additional components
without a bypass
B - bypass
Casing design
Spigot orientation
P - suspended mounting, horizontal spigot orientation
Rated air ow [m3/h]
Series of units
ATVUT - heat recovery
ATVUE - energy recovery
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ATVUT/ATVUE
180 P5(B) (EC)
TECHNICAL DATA
The unit is designed for indoor application with the ambient temperature ranging from +1 °C up to +40 °C and relative humidity up to
60 % without condensation. In cold, damp rooms, there is a possibility of freezing or condensation inside and outside the casing.
In order to prevent condensation on the internal walls of the unit, it is necessary that the surface temperature of the casing is 2-3 °C above
the dew point temperature of the transported air.
The unit should be operated continuously, and in cases where ventilation is not necessary, reduce the air flow of the fans to a minimum
(20%). This will ensure a favorable indoor climate and reduce the amount of condensation inside the unit, which can damage electronic
components. Never use the unit for dehumidification, for example, of new buildings.
The unit is rated as a Class I electrical appliance.
Hazardous parts access and water ingress protection rating:
IP22 for the unit connected to the air ducts
IP44 for the unit motors
The unit design is constantly being improved, thus some models may be slightly different from those described in this manual.
TECHNICAL DATA
MODEL ATVUT 180 P5(B)ATVUE 180 P5(B)
*
ATVUT 180 P5 ATVUE 180 P5*
Voltage [V/50 (60) Hz] 1~230
Maximum fan power [W] 87 117
Maximum unit current without a heater [A] 0.71 0.54
Maximum air flow [m3/h] 220
Sound pressure level at 3 m distance [dBA] 33 35
Transported air temperature [°C] from -25 up to +40
Casing material EPP
Insulation EPP (30-15 mm)
Filtering class of the extract filter G4
Filtering class of the supply filter G4, F7 G4 (F7 – optional)
Weight [kg] 14
Heat recovery efficiency [%] 86-98 79-94 86-98 79-94
Heat exchanger type counter-flow
* The unit is equipped with an enthalpy heat exchanger that doesn’t require condensate drainage.
MODEL DIMENSIONS [MM]
Ø D AA1 BB1 B2 HH1 H2
ATVUT/ATVUE 180 P5(B) (EC) 150 1009 900 600 326 163 264 250 110
А
H
H1
H2
А1
øD
B
B2B1
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DESIGN AND OPERATING LOGIC
The unit has the following operating logic: warm stale extract air from the room flows into the unit, where it is filtered by the extract filter,
then air flows through the heat exchanger and is exhausted outside by the extract fan. Cold fresh air from the outside flows into the unit,
where it is cleaned by the supply filter.
Then the air flows through the heat exchanger and is directed to the room with the supply fan. Heat energy of warm extract air is
transferred to clean intake fresh air from the outside and warms it up. The air flows are fully separated while flowing through the heat
exchanger. Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold season.
UNIT DESIGN
1
2
3
6
7
8
5
4
9
10
11
12
1 — supply fan , 2 — extract filter G4, 3 — heat exchanger , 4 — control unit , 5 — extract fan , 6 — bypass damper (for ATVUT/
ATVUE 180 P5B EC models ), 7 — supply filter F7, 8 — supply filter G4, 9 — Setup Mode button (for ATVUT/ATVUE 180 P5 B EC
AT21models ), 10 — duct preheater connector (for ATVUT /ATVUE
180
P5B EC AT21models ), 11 — duct reheater connector (for
ATVUT/ATVUE 180 P5B EC AT21models), 12 — cable glands.
The service side of the unit is equipped with detachable plates fixed by screws for filter cleaning and replacement operations. The control
unit is positioned inside the unit casing. The power cable and grounding cable are connected to the control unit via the cable glands
placed at the side of the unit. The difference between the supply and extract air flow temperature leads to condensate generation.
Condensate is collected in the drain pan and is removed outside through the drain pipes.
Additional equipment for the unit is purchased separately as an accessory
• Humidity sensor (HV2 is connected to the terminal block, HR-S is connected to the controller).
The unit with an installed humidity sensor maintains a set indoor humidity point. As the extract air humidity rises above the set point,
the system automatically switches to the maximum speed. As the humidity drops down below the set point, the unit returns to the
previous mode.
• CO2sensor (connected to the controller).
The sensor is designed for indoor carbon dioxide concentration measurement and respective air capacity regulation through the
control output signal to the fan. Air capacity control based on CO2concentration is an efficient energy saving solution.
• VOC sensor (connected to the controller).
Used for quantification of indoor air saturation with cigarette smoke, exhaled air, vapours of solvents and cleaning agents; for setting
sensitivity with respect to expected maximum air pollution; for local demand controlled ventilation for energy saving as air exchange
takes place only in case of exceeding the set point of air pollution.
• Duct preheater.
The heater maintains air temperature in the supply duct at level that prevents the heat exchanger from freezing. Heater installation
and connection to the unit are described in the heater user’s manual.
• Duct reheater.
The heater maintains the user-defined room air temperature. Heater installation and connection to the unit are described in the
heater user’s manual.
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UNIT OPERATION MODES
Heat recovery
Warm extract air from the room flows into the unit and is cleaned in the extract filter. Then the air is moved through the heat exchanger
and is exhausted outside with the extract fan. Cold fresh air from outside flows into the unit, where it is cleaned in the supply filter.
Then the air flows through the heat exchanger and is directed to the room with the supply fan. Supply air is heated in the heat exchanger
by transferring the heat energy of warm and humid extract air to the cold fresh air. The air flows are fully separated while flowing through
the heat exchanger. Heat recovery minimizes heat losses, which reduces the cost of space heating in the cold season.
SUPPLY AIR EXHAUST AIR
INTAKE AIR
EXTRACT AIR
Summer Cooling mode (for the units equipped with a bypass)
The bypass damper is opened, the extract air that is removed from the premises bypasses the heat exchanger. The intake air temperature
remains constant.
SUPPLY AIR EXHAUST AIR
INTAKE AIR
EXTRACT AIR
Freeze protection (danger of freezing appears when the exhaust air temperature downstream of the heat exchanger is lower than
+5 °C and intake air temperature upstream of the heat exchanger is lower than -3 °C for the units with preheating, and when exhaust
temperature downstream of the heat exchanger is lower than +3 °C for the units without preheating): to protect the heat exchanger from
freezing in the cold season, the unit has a Frost Protection mode based on the temperature sensor readings. The temperature sensor is
installed in the exhaust air duct downstream of the heat exchanger. The Frost Protection mode is activated at an exhaust air temperature
of +3 ˚С. After temperature increase the unit returns to the previous operation mode.
In the ATVUT /ATVUE 180 P5B EC A11 units the frost protection mode must be activated, see the User’s manual of the control panel
.
In
case of freezing danger , the supply fan is turned offin the ATVUT /ATVUE 180 P5B EC A14 units. After temperature increase the unit
returns to the previous operation mode.
The ATVUT/ATVUE 180 P5B EC AT21units have three
frost protection
modes: - periodically the supply fan is
turned off - with the bypass
- with the electric preheater (if the unit is equipped with a duct preheater).
Mode selection and settings are described in the control system user’s manual.
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ATVUT/ATVUE 180 P5(B) (EC)

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MOUNTING AND SET-UP
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
HV2 HUMIDITY SENSOR INSTALLATION AND CONNECTION
The HV2 humidity sensor is not included in the delivery set and can be ordered separately.
Install the humidity sensor into the mount on the inner side of the unit and connect the humidity sensor to the appropriate connector.
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UNIT MOUNTING
To attain the best performance of the unit and to minimise turbulence-induced air pressure losses, connect the straight air duct section
to the spigots on both sides of the unit while mounting.
Minimum straight air duct length:
•equal to 1 air duct diameter on intake side
•equal to 3 air duct diameters on outlet side
If the air ducts are too short or not connected, protect the unit parts from ingress of foreign objects.
To prevent uncontrollable access to the fans, the spigots may be covered with a protecting grille or other protecting device with mesh
width not more than 12.5 mm.
While installing the unit ensure convenient access for subsequent maintenance and repair.
The unit must be mounted on a plane wall (ceiling).
Mounting of the unit to an uneven surface can lead to the unit casing distortion and operation disturbance.
Fix the mounting brackets on the wall or the ceiling depending on the type of installation.
Mounting
bracket
Fastener Expansion
anchor
The air ducts must be slipped over the unit flanges until tight. Flexible air ducts must be rigidly fixed with a metal worm clamp.
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ATVUT/ATVUE 180 P5(B) (EC)

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Fasteners for mounting are not included in the delivery set and should be ordered separately.
While choosing fasteners consider the material of the mounting surface as well as the weigh of the unit, refer to the Technical Data
section. Fasteners for unit mounting should be selected by the Customer Service technician.
Unscrew the thumbscrews on the unit before attaching it to the mounting brackets.
Set the unit thumbscrews into the mating cutouts in the mounting brackets and tighten the thumbscrews.
Unit mounting example
Extract Supply
drain pipes
Intake Exhaust
Diagram 1. Wall vertical installation
302 Ø19
34÷38 drain pipes
Diagram 2. Suspended mounting
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ATVUT/AT ATVUE 180 P5(B) (EC)
Installation options according to diagrams 3-4 are possible for the ATVUE 180 P5B
modification.
drain pipe
Extract
Supply
Intake
Exhaust
Diagram 3. Wall vertical installation
50
Ø19
302
Intake
Exhaust
Extract
Supply
Diagram 4. Wall horizontal installation
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CONDENSATE DRAINAGE
The ATVUT 180 P5(B) (EC) heat recovery units require condensate
drainage. The hole for the drain pipes is in the cover of the unit.
CAUTION! The drain pipe on the side of the intake air from the street is designed to drain condensate, which forms when the
intake air is cooled in the heat exchanger if the unit is operating in a warm, humid climate. The decision on the need to install
this drain pipe must be made by the design engineer based on the operating conditions of the unit and the local climate. In
case of doubt or if there is a risk of condensate formation, the drain pipe on the intake air side must be installed for safety
reasons.
Remove the service panel and remove the plugs from the holes. When mounting according to the Diagram 1 install the drain pipe from
the delivery set into the hole. When mounting according to the Diagram 2 set the L-shaped drain pipe from the delivery set into the hole.
Seal the connections using sealant or other materials.
The drain pipes should be installed only in the holes indicated on the diagrams. For suspended and wall mounted horizontal installation
use two holes on the side of the unit, for a wall-mounted vertical installation use a hole at the bottom of the unit. Do not mount the drain
pipes in the holes not indicated on the installation diagram.
Drain hole location in case of mounting according to the Diagram 1
Drain hole location in case of mounting according to the Diagram 2
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)
Then connect the drain pipe to the sewage system using the SG-32 U-trap kit (available upon separate order). The pipes are required to
have a minimum slope of 3°. Each drain pipe is connected to a different U-trap.
min 3°
Drain hose
U-trap
Sewage system
Drain pipe
The condensate drainage system is designed for normal operation in premises with air temperatures above 0 °C! If the expected ambient
air temperatures are below 0 °C, the condensate drainage system must be equipped with heat insulation and preheating facilities.
Condensate drainage is not required for the ATVUE 180 P5(B) (EC) units as they are equipped with an enthalpy heat exchanger.
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ATVUT/AT ATVUE 180 P5(B) (EC)

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CONNECTION TO POWER MAINS
The air-handling unit is rated for connection to single-phase AC 230 V/50 (60) Hz power mains. The unit must be connected to power
mains using durable, insulated and heat-resistant conductors (cables and wires) with minimum cross section not less than 1 mm2.
The external power input must be equipped with an automatic circuit breaker built into the stationary wiring to open the circuit in the
event of overload or short-circuit. The position of the external automatic circuit breaker must ensure free access for quick power-offof
the unit. The circuit breaker trip current must correspond to the unit current consumption, refer to the Technical data section.
Connect the cables to the control unit using the cable glands on the side of the unit.
Make the electric connections through the terminal block, located in the control unit, in compliance with the External wiring diagram.
Access to the control unit
DO NOT LAY THE POWER CABLE OF THE UNIT IN CLOSE PROXIMITY
AND PARALLEL TO THE CONTROL PANEL CABLE! DO NOT COIL THE
CONTROL PANEL CABLE WHILE LAYING ITS OUT.
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
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ATVUT/AT ATVUE 180 P5(B) (EC)
External control units wiring diagram for units with an A14 control panel
2 1 2 1
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
SM-N SM-L +U Rx Tx GND C NO GND 0-10V +U PK PK N L
P1
SM1* SM2*
N L1 N L1 + Rx Tx —
CO2* PK1*
X1
Power input 230 VAC
Remove
the jumper
— ELECTRIC SHOCK HAZARD!
Designation Name Model Wire**
NO Remote control panel 4 x 0.75 mm2
CO2* CO2sensor NO 2 x 0.25 mm2
PK1* Contact from fire alarm panel NC 2 x 0.75 mm2
SM1*/SM2* External damper supply/exhaust 2 x 0.75 mm2
* Not included in the delivery set. Available upon a separate order.
**Wire cross-section with a cable length of no more than 100 m.
Maximum cable length from the controller to the control panel
Cable type Distance to power source
Shielded cable AWG24 up to 20 m
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External control units wiring diagram for units with an A2 control regulator
1 765432
230 V/50-60 Hz
Speed
controller
GND+10V
+10V CTR GND
CtrL N
X1
White
Brown
Green
XP
QF
Name Wire
Speed controller 3 x 0.25 mm2
External control units wiring diagram for units with an
A3/A4 control panel
External control units wiring diagram for units with an A40
control panel
1 2 3 4 5 6 7 8 9
10 11 12
P1
L
L1 L2 L3
X1
P1
X1 L N T C1 C1 C2 C2 SL Low Mid High
White Brown Green Yellow
L
P1
N L3 L4 L1 LB1
1 2
3
4
5 6
3
4
5 6
1
2
X1X1 1 2 3 4 5 6 7 8 9 10 11 12 13
NL T C1 C1 C2 C2 SL B
Low Mid High
Designation Name Wire
P1 Control panel 4 x 0.75 mm2
Designation Name Wire
P1 Control panel 6 x 0.75 mm2
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ATVUT/ATVUE 180 P5(B) (EC)
EXTERNAL CONTROL UNITS WIRING DIAGRAM FOR UNITS WITH AN AT21
AUTOMATION
GND
А
В
+24V
12 12 12
UU
12
CCU*
X1
12 12
U**U**
L N PE
L N
L N NC NO NOC NOC NOC CA BC GND GND
0-10V +24V
GND
0-10V +24V
+24V
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
12 12
PK1* CO2* P1* SM1* SM2*BOOST*
Brown
Yellow
Green
White
230 V/50 (60) Hz
Designation Name Contact
type Wire** Note
SМ1* Supply air damper actuator NO 2 x 0.75 mm23 A, 30 V DC/~250 AC
SМ2 * Exhaust air damper actuator NO 2 x 0.75 mm23 A, 30 V DC/~250 AC
РК1* Contact from fire alarm control panel NC 2 x 0.75 mm2
CCU* Cooler control NO 2 x 0.75 mm23 A, 30 V DC/~250 AC
Р1* External control panel 4 x 0.25 mm2
Boost* Contacts ON/OFF Boost NO 2 x 0.75 mm
CO2* External CO2sensor 3 x 0.75 mm
* Not included in the delivery set.
** The U supply voltage of the SM1, SM2 external dampers is selected depending on the type of dampers.
*** Maximum connecting cable length is 20 m!
Output parameters: terminals 17-22 — 3 A, 30 V DC / ~ 250 VAC («dry contact»).
— ELECTRIC SHOCK HAZARD!
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TECHNICAL MAINTENANCE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS.
FOLLOW THE SAFETY REGULATIONS WHEN CARRYING OUT MAINTENANCE.
Maintenance operations of the unit are required 3-4 times per year. They include general cleaning of the unit and the following operations:
1. Filter maintenance.
Clogged filters increase air resistance in the system and reduce supply air volume. The filters require cleaning not less than 3-4 times per
year. Vacuum cleaning is allowed. After two cleanings filters must be replaced. For new filters contact the Seller.
To clean or replace the filters, remove the detachable plates located on the service side of the unit. After cleaning install the filters and
the detachable plates in the reverse order.
2. Heat exchanger maintenance (once a year).
Some dust may accumulate on the heat exchanger even in case of regular maintenance of the filters. To maintain the high heat recovery
efficiency, regular cleaning is required. To clean the heat exchanger, remove it from the unit and clean the heat exchanger by using
compressed air or a vacuum cleaner. After cleaning, re-install the heat exchanger into the unit. Before removing the heat exchanger,
unscrew the 7 screws and remove the cover. Remove it from the unit and clean the heat exchanger by using compressed air or a vacuum
cleaner. After cleaning, re-install the heat exchanger into the unit.
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ATVUT/ATVUE 180 P5(B) (EC)
3. Fan maintenance (once per year).
Even in case of regular maintenance of the filters, some dust may accumulate inside the fans and reduce the fan performance and supply
air flow.
Clean the fans with a soft cloth, brush, or using compressed air.
Do not use water, aggressive solvents or sharp objects as they may damage the impeller.
4. Supply air flow control (twice per year).
The supply duct grille may get clogged with leaves and other objects reducing the unit performance and supply air delivery.
Check the supply grille twice per year and clean it as required.
5. Ductwork system maintenance (once in 5 years).
Even regular fulfilling of all the maintenance operations prescribed above may not completely prevent dirt accumulation in the air ducts,
which leads to air pollution and reduces the unit capacity.
Duct maintenance means regular cleaning or replacement.
6. Control unit maintenance (if necessary).
The control unit is positioned inside the unit casing.
To access the control unit, remove the fixing screws on the panel and remove the control unit lid.
POSSIBLE REASONS AND TROUBLESHOOTING
Problem Possible reasons Troubleshooting
The fan(s) does not start
when the unit is on.
No power supply. Make sure the power supply line is connected correctly,
otherwise troubleshoot the connection error.
The motor is jammed, the impeller blades are
clogged.
Turn the unit off. Troubleshoot the motor jam and the
impeller clogging. Clean the blades. Restart the unit.
Alarm in the system. Turn the unit off. Contact the Seller.
Automatic circuit
breaker tripping
following the unit
turning on.
Overcurrent as a result of short circuit in the electric
circuit.
Turn the unit off. Contact the Seller.
Low air flow.
Low set fan speed. Set higher speed.
The filters and the fans are clogged, the heat
exchanger is clogged.
Clean or replace the filters, clean the fans and the heat
exchanger.
Ventilation system elements (air ducts, diffusers,
louver shutters, grilles) are clogged, damaged, or
closed.
Clean or replace the ventilation system elements, such
as air ducts, diffusers, louvre shutters, grilles.
Cold supply air. The extract filter is soiled. Clean or replace the extract filter.
Noise, vibration.
The impeller(s) is soiled. Clean the impeller(s).
The fan or casing screw connection is loose. Tighten the screw connection of the fans or the casing
all the way.
No anti-vibration connectors on air duct pipe
flanges.
Install anti-vibration connectors.
Fan out of order. Turn the unit off. Contact the Seller.
Water leakage (only in
ATVUT units).
The drainage system is soiled, damaged, or installed
incorrectly.
Clean the drain line if necessary. Check the drain line
slope angle. Make sure that the U-trap is filled with
water and the drain pipes are frost protected.
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