Vents VUT 300 E2V EC User manual

Brand: Vents

Model: VUT 300 E2V EC

Category: Mobile air conditioners

Type: User manual

Vents VUT 300 E2V EC is a heat-recycling air supply and exhaust unit designed for continuous air exchange in private residences, offices, hotels, cafes, and conference rooms. It features:

Energy-saving heat recovery system with up to 85% efficiency, reducing heating costs.
Electric air pre-heater (2 kW) to warm up incoming air when needed.
Electric air post-heater (2 kW) for additional supply air heating.
Counter-flow heat exchanger made of polystyrene for efficient heat transfer without air mixing.
Supply and exhaust air filters (class G4) to remove impurities.
Condensate drip pan and drain tubes for moisture removal.

Vents VUT 300 E2V EC is a heat-recycling air supply and exhaust unit designed for continuous air exchange in private residences, offices, hotels, cafes, and conference rooms. It features:

Energy-saving heat recovery system with up to 85% efficiency, reducing heating costs.
Electric air pre-heater (2 kW) to warm up incoming air when needed.
Electric air post-heater (2 kW) for additional supply air heating.
Counter-flow heat exchanger made of polystyrene for efficient heat transfer without air mixing.
Supply and exhaust air filters (class G4) to remove impurities.
Condensate drip pan and drain tubes for moisture removal.

OPERATION MANUAL

VUT 300 E2V EC

Air supply and exhaust unit

with heat recovery

VUT 300 E2V EC

Introduction

Purpose

Delivery Package

Designation key

Main Technical Data

Safety Requirements

Design and Operating Principle

Installation and Setup

Condensate Drainage

Connection to power mains

Unit control

Technical Maintenance

Fault Handling

Storage and Transportation Regulations

Manufacturer’s Warranty

Acceptance Certicate

Connection Certicate

Warranty Card

CONTENTS

INTRODUCTION

PURPOSE

DELIVERY PACKAGE

Unit - 1 item;

Operation Manual - 1 item;

Wall-Mounted Control Panel - 1 item;

Remote Control - 1 item;

Duct Temperature Sensor - 1 item;

Shipping Box - 1 item;

Fixture Kit - 1 item.

The present operation manual consisting of the technical details, operating instructions and

technical specication covers the installation of VUT 300 E2V EC heat-recycling air supply and exhaust

units of VENTS series (hereinafter the Unit).

The unit is heat-recycling device designed as an essential element of energy-saving systems in

buildings and structures. The unit is a component and is not designed for autonomous operation.

The unit is designed to arrange continuous air exchange by means of mechanical ventilation

in private residences, oces, hotels, cafes, conference rooms as well as recuperation of heat energy

contained in warm stale extract air to warm up the puried supply air.

The transported air must not contain any combustible or explosive mixtures, chemical fumes,

coarse dust, soot, fat or any environment, prolic for the formation of harmful substances (toxic

substances, dust and pathogens) as well as sticky substances and brous materials

The unit is not intended for operation by children or any persons with reduced

physical, mental or sensory capacities as well persons lacking the required training.

The unit must be handled only by properly qualied personnel after the

appropriate safety instructions.

Install the unit to be out of reach of children.

VUT 300 E2V EC

DESIGNATION KEY

The unit is designed for operation in an enclosed area at ambient temperatures from +1 °C to +

40 °C at relative humidity of up to 80%.

Hazardous parts access and water ingress protection standard:

Unit motors - IP 44;

Unit assembly connected to air ducts - IP 22.

The unit series designations, their main outside and connecting dimensions, appearance and

technical parameters are given on Figure 1 and in Table 1.

The units undergo continuous improvement - therefore, some models may slightly dier from the

ones described herein.

VUT 300 E 2 V ЕС

Motor Type

Electronically commutated

Spigot Arrangement

V - vertical

Air capacity, m³/h

Unit Type

VUT - heat recovery ventilation

Electric heater

Number of Heating Coils

MAIN TECHNICAL DATA

Fig. 1. Outside and Connecting Dimensions of the Unit

600

697

260

373

428

700

157

410 110180

123108

149

10 m cable

VUT 300 E2V EC

Model VUT 300 E2V EC

Ventilation Mode Speed 1 Speed 2 Speed 3

Supply Voltage, V/50 Hz 1 ~ 230

Maximum Fan Power, W 30 74 212

Fan Current, A 0,3 0,6 1,4

Electric Heater Power, kW 2 Items x 2

Electric Heater Current, A 2 Items x 8.7

Total Unit Power, kW 4,22

Maximum Consumption Current of Unit, A 18,8

Maximum Air Flow, m

/h 80 160 300

Sound Pressure Level at 3m, dB(A) 10 19 37

Transported Air Temperature, °C from - 40 ° C to +60 ° C *

Casing Material Aluzinc

Insulation 20 mm mineral wool

Filter: Air Exhaust/Air Supply bag lter G4

Connected Air Duct Diameter, mm Ø 150

Weight, kg 38

Recuperating Eciency up to 85%

Heat Exchanger Type Counterow

Heat Exchanger Material Polystyrene

* — the transported air minimum temperature depends on the fan speed settings. See «Heat

Exchanger Freezing Protection» section on page 14.

Table 1 . Technical Parameters

Ambient Temperature from 0 °C to 40 °C

Relative Humidity from 5% to 90 % (without condensation)

Cable Section from 0.18 mm2 to 0.35 mm

Material ABS Plastic

Dimensions (WxHxD) 86x86x14 mm

Cable Length Up to 10 m

Ingress Protection Class IP30

Table 2 . Control Panel Specications

DESIGN AND OPERATING PRINCIPLE

The unit design and operating principle are shown on Fig. 2. The warm foul air from the premises

supplied to the device is puried in the exhaust lter, passed through the heat exchanger and then

extracted outside via the ducts by the exhaust fan. The cool fresh air from the outside enters the unit

through the air ducts and is stripped of impurities in the supply lter.

If the supply air temperature is below the threshold set on the control panel (-10 °C by factory

default) the incoming air is warmed up by a 2 kW electric pre-heater.

The air then passes through the heat exchanger and is delivered into the premises by the supply

fan. The heat exchanger ensures transfer of the heat energy extracted from the warm exhaust air to

the clean outdoor air therefore heating it up. The air streams do not mix in the process.

Heat recovery reduces heat energy losses and, consequently, the heating costs in the cold season.

The supply air can be additionally post-heated by the 2 kW electric heater built into the unit.

The unit design and operating logic are shown in Fig. 2.

The basic conguration includes:

1. Exhaust fan;

2. Supply Fan;

3. Counter-ow heat exchanger;

4. Exhaust air lter, class G4;

5. Supply air lter, class G4;

6. Condensate drip pan;

7. Condensate drain tubes;

8. Electric air pre-heater;

9. Electric air post-heater.

10. Supply air duct temperature sensor.

RESTRICTIONS:

• Do not operate the unit outside the permissible temperature range specied

in the Operation Manual or in areas with aggressive admixtures in the air

and in explosive environments.

• Do not connect drying machines or other similar high-power equipment to the

ventilation circuit.

• Do not use the unit for handling air-dust mixtures.

SAFETY REQUIREMENTS

Installation and operation of the unit shall be subject to the present Operation Manual and the all

appliable local building, re safety, technical and electric regulatory documents.

The unit must be properly earthed.

Prior to connecting the unit to the power mains check for visible damage as well as for any foreign

objects in the fan casing which may damage the impeller blades If necessary, contact the service centre.

ATTENTION!

Make sure to disconnect the unit from the power mains prior to any installation,

maintenance, connection and repair work.

VUT 300 E2V EC

INSTALLATION AND SETUP

Fig. 2. Design and Operating Logic

Ensure convenient access for maintenance, servicing or replacement operations, required for the

unit installation.

The wall intended for unit installation must be smooth. Any surface irregularities will lead to unit

casing skew and may prevent the unit from operating properly.

To enable proper post-heating of the supply air install the duct temperature sensor in the air duct

(item 11 on Fig. 2) at the minimum distance of 1 m from the supply air spigot.

The supply air duct temperature sensor is installed as follows:

Drill a Ø 9 mm hole in the air duct;

Insert the sensor into the hole;

Secure the sensor ange with three self-tapping screws.

It is recommended that the sensor and air duct joint is hermetically sealed.

763

Exhaust air

Intake air

Extract air

Supply air

min 1m

Fig. 3. Unit Installation

The unit is mounted onto the wall using anchor bolts - see Fig. 3.

16*

Anchor bolt

The wall-mounted control panel is installed as follows:

Lift the clips through the access holes in the bottom of the wall-mounted control panel

(Fig. 4).

Remove the back cover.

Disconnect the panel from the

terminal block.

Lay the cable in the wall to the

panel installation site.

Secure the panel back cover to the

wall (Fig. 5).

Fasten the cable to the terminal

block. The wiring diagram is shown in Fig. 5.

Clip the wall-mounted panel fascia

in place.

Fig. 4. Back Cover Removal

VUT 300 E2V EC

CONDENSATE DRAINAGE

Fig. 6. Condensate Removal

min 3°

min 100 mm

min 50 mm

CONDENSATE

DRAIN TUBES

CONNECTION PIPES

U-trap

SEWAGE COLLECTION

SYSTEM

min 3°

Fig. 5. Fixing Back Cover to the Wall

The condensate drip pan installed in the heat recovery section has pipes for extracting the

condensed uid outside the unit.

Connect the tube, the U-trap (not included in delivery package) and the sewage collection system

with metal or rubber pipes (Fig. 6). The pipe pitch must be at least 3°.

Fill up the system with water before connecting the unit to the power mains! During the operation

the U-trap must be always lled with water. Make sure that the water ows freely into the sewage

collection system or otherwise condensed water may build up in the unit during heat recovery, which

consequently, may cause equipment failure and water ingress into the premises.

+24V

data2/B

GND

data1/A

XT1

222325 24

+24V

data2/B

GND

data1/A

XT4

262729 28

XT8

The unit connects to 230 V / 50 Hz single-phase AC mains. The mains connection is ensured by a 3

x 2.5 mm2 power cable connected to the unit input terminal block at the factory. The cable strands are

marked as follows: phase (L), neutral (N), and protective earth (PE).

The unit must be connected to the power mains via an automatic cutout switch built into the

stationary wiring with a magnetic breaker (with the nominal trip current of at least 20 A) according to

Fig. 7.

Disconnect the unit from the power supply prior to any maintenance or repair. The

nominal 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.

CONNECTION TO POWER MAINS

Fig. 7. Unit Power Connection Diagram

where QF is the automatic switch (not

included in the delivery package);

X1 - terminal block.

A N

N PE

L N PE

230 V / 50 Hz

The position of QF external switch must ensure free access for quick power-o of the fan. The power

conductor section is 2.5 mm2.

The unit enables the following external connection options (X3 terminal block markings as shown

on the label are enclosed in brackets, Fig. 8):

Automatic re extinguishing system contact («PK»);

Humidity relay (humidity sensor) contact or CO2 sensor contact («H»);

«3-point control» air damper («Y-N, Y-L, Y-C»).

On connecting the automatic re extinguishing system contact remove the jumper between

terminals X3:1 and X3:2 of terminal block X3; In this case a normally closed «dry» contact is used which

opens the unit control circuit on re-triggered actuation from the central re-ghting station cutting

the unit power.

The humidity sensor (or CO2 sensor) is connected to terminals X3:3 and X3:4 of terminal block

X3; The connection relies on a normally closed «dry» contact. Once it is closed, the unit switches to

maximum speed.

The condensate removal system is designed for indoor operation at ambient temperatures

above 0 °C. If the expected air temperatures are below 0 °C, the condensate drainage system must be

equipped with heat insulation and pre-heating facilities.

VUT 300 E2V EC

The damper actuator is connected to terminals X3:5, X3:6 and X3:7 of terminal block X3. The same

contacts can be used for parallel connection of one more damper.

The additional contacts are connected according to the wiring connection diagram (Fig. 8). The

wires are routed into the terminal box through a sealed lead-in in the cover.

Fig. 8. External Connections Diagram

UNIT CONTROL

Fig. 9. Control Panel and Remote Control

Unit On/O

Unit Operation Mode

Buttons (see details below)

Fan Speed Control Buttons

Remote Control

Remote Controller

Unit On/O

Fan Speed Up

On Heater

O button

Fan Speed Down

Speed 1

Speed 3

Speed 2

Scheduled Operation

On/O. Timer

Wall-Mounted Control Panel

The unit is controlled by means of the wall-mounted control panel and the remote control (Fig. 9).

1. Unit On \ O.

The unit is activated \ deactivated:

From the wall-mounted control panel by means of the Unit On/O button ;

From the remote control panel by means of the Unit On/O button .

"2"

ÐÊ

Y-L

Y-C

Remove the jumper on connecting the

NC contact to the re alarm system

to the re alarm

system board

РК H

“1”

“2”

“3”

Y-C

Y-L

Y-N

to the humidity

sensor or CO2 sensor

Damper actuator

to the external air

damper

Fig. 10. Panel display in the OFF mode

When the unit is o (Fig. 10) the wall-mounted

control panel display indicates:

Room temperature;

Day;

Time;

Deactivated status ;

In the TEH blowing mode indicators

and (blowing) are on as well as the

blowing countdown (minutes : seconds).

Fig. 11. Display in the ON state

When the unit is on (Fig. 11) the wall-mounted

control panel display indicates:

Room temperature;

Day;

Time;

Fan speed status ;

Timer status;

Timer operation is conrmed by the

indicator. When the timer is o the

indicator goes on.

Heater status information. Heater operation is

conrmed by the

2. Ventilation Mode Control

The unit fan speed can be set by means of:

From the wall-mounted control panel: Press the button to increase the speed or press the

button to reduce the speed cyclically (i.e. speed 1 - speed 2 - speed 3).

From the remote controller: Press the button to increase the speed or press the

button to reduce the speed cyclically (i.e. speed 1 - speed 2 - speed);

From the remote controller: Press the button to select speed 1, press the button to

select speed 2 or press the

button to select speed 3 correspondingly. The wall-mounted control

panel display shows the current fan speed status:

Indicator — «Speed 1» mode;

Indicator — «Speed 2» mode;

Indicator — «Speed 3» mode;

3. Supply Air Pre-Heating.

The supply air pre-heater raises the temperature to the pre-set value depending on the duct

temperature sensor setting. The heater is activated / deactivated:

From the wall-mounted control panel: press and hold the , button, then press the

button.

From the remote controller: to switch the heater on press the button, or press the

button to switch it o.

VUT 300 E2V EC

4. Timer.

The timer enables automatic switching of the fans to maximum speed with automatic reversion after a

selected period of time (20-60 minutes). The timer is activated / deactivated:

From the wall-mounted control panel: to activate the timer press and hold the button

and then press the

button. A single press of the button sets the timer to 20 minutes while each

subsequent press increases the timer setting in 10 minute increments. The maximum timer setting is 60

minutes. To deactivate the timer press and hold the

button for 3 seconds;

From the remote controller: to activate the timer for a 20 minute interval press the

button. To deactivate the timer switch the unit o by means of the

button or the button.

5. Heat Exchanger Freezing Protection (Supply Air Pre-Heating).

The pre-heater which protects the heat exchanger against freezing is activated if air

temperature in the supply air duct upstream of the heat exchanger drops below the pre-set value (-10

°C by default).

If the maximum pre-heater capacity is insucient to raise the air temperature in the duct

upstream of the heat exchanger above the threshold value the unit slows the fans one increment down.

ATTENTION!

Upon deactivation with a working heater the unit continues operation for an

additional 2 minutes to allow heater cooling. This is conrmed by the

indicator.

Fan Speed Setup Mode.

The unit operates at one of the three saved fan speeds: low speed, medium speed and high speed.

At the setup stage each of the speed settings can be attributed to a specic supply and exhaust fan

performance. Ventilation performance settings are made in the fan speed setup mode. The fan speed

setup mode is only available while the unit if o. To access the fan speed setup mode press and hold the

on the wall-mounted control panel, and then press and hold the button for 3 seconds.

Upon entering the setup mode the wall-mounted panel display screen will show the

and

indicators (Fig. 12).

Set the fan speed as necessary using the

and buttons.

While the speed is being set the display screen

will show the currently selected speed

, or

Fig. 12. Fan Power Adjustment

6. Unit Parameter Setup Mode.

Changing ventilation mode performance settings will alter the fan power settings

made at the factory! Fan speed and temperature sensor setup is only possible by means

of the wall-mounted control panel!

To change the supply fan power press

and hold the

button and press the button

to increase the speed or press the

дbutton to

decrease it. Each press of the

and buttons

increases or reduces the supply fan power in 1 %

increments. With the

button pressed the display

screen will indicate the current supply fan power

(Fig. 13).

To change the exhaust fan power press

and hold the

button and use the buttons

to increase the speed or use the

button to

decrease it. Each press of the

and buttons

increases or reduces the exhaust fan power in 1 % increments. With the

button pressed the display

screen will indicate the current exhaust fan power.

To exit the fan speed setup mode and save the changes press the

Изменение скорости вентиляторов с пульта дистанционного управления не предусмотрено.

To revert to the factory settings enter the fan speed setup mode and press the

and buttons

simultaneously and hold them for 3 seconds.

Factory fan speed settings:

Speed 1 — 40 %

Speed 2 — 70 %

Speed 3 — 100 %

Fig. 13. Fan Power Adjustment

Duct Temperature Sensor Setup Mode.

To enter the duct temperature sensor setup mode switch o the unit and simultaneously press the

and on the wall-mounted control panel.

Entering the sensor setup mode is conrmed by

the

and indicators.

While in the setup mode the wall-

mounted panel display screen shows the duct

temperature sensor and freezing protection sensor

settings (Fig. 14).

The duct temperature sensor setting is

adjusted by pressing the

button. The values are

cycled in the range from +16 °C to +30 °C in 2 °C

increments.

The freezing protection sensor

temperature is adjusted by pressing the

button.

The values are cycled in the range from -6 °C to -12

°C.

Fig. 14. Temperature Sensor Adjustment

To view the current temperature sensor settings press the button.

VUT 300 E2V EC

Press the button to display the

controller circuit execution code and the rmware

version code on the wall-mounted control panel

screen (Fig. 15).

To exit the duct temperature sensor

setup mode press the

button.

Fig. 15. Firmware Version

5. Filter Replacement Signal.

On elapsing of the lter replacement interval (3,000 hours) the temperature indication on the wall-

mounted control panel display screen will be substituted by the

lter replacement alert message (Fig.

16).

Fig. 16. Filter Replacement Alert

On lter replacement alert switch o

the unit by pressing the

button and disconnect

it from the power mains. Replace the lter (see the

sequence given in the «Technical Maintenance»

section, page 19).

Switch on the unit by pressing the

button on the wall-mounted panel or the

button on the remote controller. Then press the

and

buttons to reset the service hour counter.

Date and Time Setup.

Switch o the unit.

To enter the date and time setup mode press and hold the , then press the on the

wall-mounted control panel.

While holding the button select the parameter for adjustment by using the and

buttons. The parameter being adjusted is highlighted by blinking.

The date and time parameters are ordered as follows:

1. Minutes;

2. Hours;

3. Day;

4. Date;

5. Month;

6. Year.

Use the and buttons on the wall-mounted control panel to change the selected

parameter setting as necessary.

To exit the date and time setup mode press the button.

7. Scheduled Operation Mode.

To activate the scheduled operation mode press and hold the button, and then press

the

button on the wall-mounted control panel. The scheduled operation mode is conrmed by the

indicator on the display screen.

To deactivate the scheduled operation mode press and hold the button, and then press

the

button on the wall-mounted control panel.

You can also activate or deactivate the scheduled operation mode using the button on

the remote controller.

The timer will always prevail over scheduled operation.

8. Scheduled Operation Setup.

There are four entries for each day which contain the time for unit switching to a specic fan speed

as well as heater activation or deactivation.

To access the scheduled operation settings switch o the unit using the on the wall-

mounted control panel or the

button on the remote controller.

Press and hold the button on the wall-mounted control panel, and then press the

button.

Fig. 17. Scheduled Operation Setup Mode Indicators

Day

Time

Entry

Number

Heater

Status

Fan Speed

Heater O

Heater On

To select the scheduled operation setup mode parameters hold the button and use the

and buttons to make the selection as necessary.

Press the and buttons to set the parameter values.

Scheduled Operation Setup Mode Parameters (Fig. 17):

• Entry Number — there are four entries for each day.

• Day — day setting.

• Heater Status — heater setting for the current entry. - Heater On, - Heater O.

• Fan Speed — fan speed setting for the current entry.

• Time — time setting for the current entry.

To copy the entries to the following day press and hold the button, then press . Please

note that copying entries from Sunday onto Monday is not possible.

To exit the scheduled operation setup mode press the button on the wall-mounted

control panel or the

button on the remote controller.

A sample scheduling sequence is given in Table 3. By default the scheduled operation mode is set

up for cooling. To set up the unit for heating operation change the heater settings — set

VUT 300 E2V EC

Day

Entry Number

1 2 3 4

Start

Time

Mode

Heater

Status

Start

Time

Mode

Heater

Status

Start

Time

Mode

Heater

Status

Start

Time

Mode

Heater

Status

Mo. 07:00 2 speed O 08:00 1 speed O 17:00 2 speed O 22:00 1 speed O

Tu. 07:00 2 speed O 08:00 1 speed O 17:00 2 speed O 22:00 1 speed O

We. 07:00 2 speed O 08:00 1 speed O 17:00 2 speed O 22:00 1 speed O

Th. 07:00 2 speed O 08:00 1 speed O 17:00 2 speed O 22:00 1 speed O

Fr. 07:00 2 speed O 08:00 1 speed O 17:00 2 speed O 22:00 1 speed O

Sa. 10:00 2 speed O 12:00 2 speed O 17:00 2 speed O 23:00 1 speed O

Su. 10:00 2 speed O 12:00 2 speed O 17:00 2 speed O 23:00 1 speed O

Table 3 . Sample programming sequence

9. Alarms

In case of an emergency the unit switches o while the alarms are displayed on the wall-mounted

panel screen (Fig. 18). The list of possible alarms is given in Table. 4.

Fig. 18. Alarm Indication

Freezing Protection

Sensor Interruption

Duct Sensor Interruption

TEH Overheating

Temperature Sensor Alarm

ALARM INDICATION FAULT HANDLING

TEH Overheating

TEH Overheating. Contact the

maintenance service.

Temperature Sensor

Alarm

Short-circuiting of one or two

temperature sensors. Contact the

maintenance service

Duct Sensor Interruption

Contact the maintenance service to

restore the duct sensor.

Freezing Protection

Sensor Interruption

Contact the maintenance service to

restore the freezing protection sensor.

Table 4 . Unit-Specic Alarms

TECHNICAL MAINTENANCE

The unit requires maintenance works 3-4 times per year. Maintenance includes regular cleaning and

the following operations:

1. Filter maintenance (3-4 timed per year).

Dirty lters increase air resistance in the system and reduce supply air volume. Clean the lters as

required but at least once in 3-4 months. Use a vacuum-cleaner to remove the contamination or use a

new lter. Contact your seller for new lters.

Filter removal procedure (Fig. 19):

1. Remove four bolts with handles.

2. Open the unit access door and remove 2 M6 screws to release the stoppers. Shut the unit access

door ad lift it upwards to remove it from the supports.

3. Remove the heat exchanger from the unit by pulling its bend.

4. Remove the extract and supply lter.

Install the lters in reverse orders.

2. Heat exchanger inspection (once per year).

Some dust can get accumulated on the heat exchanger block even in case of regular maintenance

of the lters. To maintain the high heat exchange eciency, regular cleaning is required. To clean the

heat exchanger pull it out of the unit and ush it with warm soap or mild detergent water solution. Re-

install the dry heat exchanger to the unit.

3. Fan inspection (once per year).

Even in case of regular lter maintenance, some dust and grease can get accumulated inside the

fans and reduce the unit performance and supply air ow.

Clean the fans with a soft brush or cloth. No water and abrasive detergent, sharp objects or solvents

are allowed for cleaning to prevent the impeller damage.

4. Condensate drainage (once per year).

The drain pipes may get clogged with extracted particles. Pour some water inside the drain pan and

check the pipe for clogging. Clean the U-trap and drain pipe if required.

5. Supply air ow control (twice per year).

Leaves and other pollutions can clog the supply air grille and reduce the unit performance and

supply air volume. Check the supply grille twice per year and clean it as required.

6. Ductworks inspection (once in 5 years).

Even regular technical maintenance of the unit may not completely prevent dirt accumulation in

the air ducts, which impairs the unit performance. The air duct maintenance mens their regular cleaning

or replacement.

7. Control Unit Maintenance (as required).

The control unit must be serviced by an expert qualied for unassisted operations with electrical

installations up to 1000 V and made familiar with the present operation manual. Disconnect the unit

from the power mains prior to the control unit maintenance.

Control unit maintenance sequence (Fig. 20):

1. Take the unit access door and remove the heat exchanger.

2. Remove the self-tapping screws to release the protecting cover.

3. Remove the self-tapping screws securing the swivel control unit panel.

4. Remove the control unit lid.

VUT 300 E2V EC

Fig. 19. Heat exchanger ad tler maintenance

1 2

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Vents VUT 300 E2V EC User manual

Brand: Vents

Model: VUT 300 E2V EC

Category: Mobile air conditioners

Type: User manual

Vents VUT 300 E2V EC is a heat-recycling air supply and exhaust unit designed for continuous air exchange in private residences, offices, hotels, cafes, and conference rooms. It features:

Energy-saving heat recovery system with up to 85% efficiency, reducing heating costs.
Electric air pre-heater (2 kW) to warm up incoming air when needed.
Electric air post-heater (2 kW) for additional supply air heating.
Counter-flow heat exchanger made of polystyrene for efficient heat transfer without air mixing.
Supply and exhaust air filters (class G4) to remove impurities.
Condensate drip pan and drain tubes for moisture removal.

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Vents VUT 300 E2V EC User manual

Vents VUT 300 E2V EC User manual

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