VUT 160/250/350 PB EC L/R A11/A14 CONTENTS Safety requirements ..................................2 Purpose ........................................ 4 Delivery set ......................................4 Designation key ....................................4 Technical data ....................................5 Unit design and operating principle ..........................7 Installation and set-up................................10 Connection to power mains and unit control ......................13 Technical maintenance ................................
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• Do not operate the unit outside the • Do not use damaged equipment or cables temperature range stated in the user’s when connecting the unit to power mains. manual. Do not operate the unit in aggressive or explosive environments. •...
VUT 160/250/350 PB EC L/R A11/A14 PURPOSE The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafés, 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 supply air.
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 80 %. In order to prevent condensation on the internal walls of the units, it is necessary that the surface temperature of the casing is 2-3 °C higher than the dew point temperature of the transported air.
UNIT DESIGN AND OPERATING PRINCIPLE 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.
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VUT 160/250/350 PB EC L/R A11/A14 The VUT 160/250/350 P(2)B EC L/R A14 unit assembly Control panel Electric lead-ins Control unit Supply fan Extract fan Bypass damper Temperature sensor for heat exchanger freeze protection Extract filter Supply filter HV1 humidity sensor* Outdoor temperature sensor Counter-flow heat exchanger Drain pan...
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UNIT OPERATION MODES Heat recovery mode: 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.
VUT 160/250/350 PB EC L/R A11/A14 INSTALLATION AND SET-UP READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT. HV1 HUMIDITY SENSOR INSTALLATION AND CONNECTION IN VUT 160/250/350 PB EC L/R A11 UNITS The HV1 humidity sensor is not included in the delivery set and can be ordered separately. Remove the service panel and install the humidity sensor into the mount from the side of the extract air duct and connect the humidity sensor connector to the respective contact socket coming from the control unit.
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HUMIDITY SENSOR INSTALLATION AND CONNECTION IN VUT 160/250/350 PB EC L/R A14 UNITS The humidity sensor is not included in the delivery set and can be ordered separately. Mounting sequence: • Remove the mounting screws of the service side panel and take it off. Install the humidity sensor into the mount on the inner side of the casing near the extract air duct and connect the connector to the respective contact socket coming from the control unit, refer to the External wiring diagram.
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VUT 160/250/350 PB EC L/R A11/A14 WALL-MOUNTED CONTROL PANEL INSTALLATION Control panel wall surface or flush mounting are available. Examples of wall flush mounting using a mounting box are shown in the control panel user’s manual. The mounting box and the fastening kit for the units with an A11 automation are purchased separately. CONDENSATE DRAINAGE Connect the drain pipe to the sewage system using the SG-32 U-trap kit (available upon separate order).
CONNECTION TO POWER MAINS AND UNIT CONTROL 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.
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VUT 160/250/350 PB EC L/R A11/A14 CONNECTION OF ADDITIONAL EXTERNAL CONTROLS TO THE VUT 160/250/350 PB EC L/R A14 UNITS The unit has an option of additional external controls connection to the X2 terminal block, which is located on the hinged electrical mounting plate of the control unit.
TECHNICAL MAINTENANCE DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE ANY MAINTENANCE OPERATIONS! Maintenance operations of the unit are required 3-4 times per year. Maintenance includes general cleaning of the unit and the following operations: 1. Filter maintenance (3-4 times per year). Dirty filters increase air resistance in the system and reduce supply air volume.
VUT 160/250/350 PB EC L/R A11/A14 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 brush or cloth. Do not use water, aggressive solvents, or sharp objects as they may damage the impeller. 4.
MANUFACTURER’S WARRANTY The product is in compliance with EU norms and standards on low voltage guidelines and electromagnetic compatibility. We hereby declare that the product complies with the provisions of Electromagnetic Council Directive 2014/30/EU, Low Voltage Directive 2014/35/ EU and CE-marking Directive 93/68/EEC. This certificate is issued following test carried out on samples of the product referred to above. The manufacturer hereby warrants normal operation of the unit for 24 month after the retail sale date provided the user's observance of the transportation, storage, installation, and operation regulations.
CERTIFICATE OF ACCEPTANCE Unit Type Heat recovery air handling unit Model VUT ______ PB EC __ A___ Serial Number Manufacture Date Quality Inspector’s Stamp SELLER INFORMATION Seller Address Phone Number E-mail Purchase Date This is to certify acceptance of the complete unit delivery with the user’s manual. The warranty terms are acknowledged and accepted.
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