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7

VUT .. PE EC

DESIGN AND OPERATING LOGIC

The unit operates as follows: 

Warm stale extract air from the room flows through the air ducts to the unit, where it is filtered, then air flows through the heat 

exchanger and is exhausted outside by the extract fan through the air ducts. 

Clean cold air from outside is moved by the supply fan to the unit, where from it is  directed to the supply filter. Then filtered air flows 

through the heat exchanger and moves to the room through the air ducts. 

Heat energy of warm extract air is transferred to clean intake fresh air from outside and warms it up. Heat recovery minimizes thermal 

energy losses, energy demand  and operating costs for air heating accordingly. 

The unit is equipped with a detachable service panel for repair works and preventive maintenance and a cover enabling access to 

the control system components.

SUPPLY AIR 

EXTRACT AIR

INTAKE AIR

EXHAUST AIR

The basic unit delivery set includes a remote control panel for connection to the control system inside the unit casing. 

The unit comprises a supply and an extract centrifugal single-inlet fan with forward curved blades and maintenance-free EC motors 

with external rotor and built-in overheat protection, a plate counterflow heat exchanger and an electric heater. 

The supply G4 filter cleans supply air flow and prevents contamination of the unit parts. The extract G4 filter prevents contamination 

of the unit components. 

Some condensate may be generated during heat recovery. The condensed fluid is collected in the drain pan and is removed from the 

unit through the drain hoses.

 

UNIT DESIGN BASED 

on VUT 350 PE EC

EXTRACT FAN

SUPPLY FILTER

EXTRACT FILTER

BYPASS

SUPPLY FAN

DRAIN PAN 

ELECTRIC HEATER 

CONTROL UNIT 

CONTROL PANEL 

HEAT EXCHANGER 

DIFFERENTIAL 

PRESSURE SWITCH

DIFFERENTIAL 

PRESSURE SWITCH

 

UNIT OPERATING LOGIC

based on VUT 600 PE EC unit example 

Summary of Contents for VUT 1000 PE EC

Page 1: ...USER S MANUAL VUT 350 PE EC VUT 600 PE EC VUT 1000 PE EC HEAT RECOVERY AIR HANDLING UNIT ...

Page 2: ...information Failure to follow the rules and safety precautions noted in this user s manual may result in an injury or unit damage After a careful reading of the manual keep it for the entire service life of the unit While transferring the unit control the user s manual must be turned over to the receiving operator UNIT INSTALLATION AND OPERATION SAFETY PRECAUTIONS Disconnect the unit from power ma...

Page 3: ...ains prior to any technical maintenance Do not store any explosive or highly flammable substances in close proximity to the unit When the unit generates unusual sounds odour or emits smoke disconnect it from power supply and contact the Seller Do not open the unit during operation Do not direct the air flow produced by the unit towards open flame or ignition sources Do not block the air duct when ...

Page 4: ...D PERSONNEL AFTER THE APPROPRIATE BRIEFING THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED ACCESS BY UNATTENDED CHILDREN 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...

Page 5: ... to 90 Heat exchanger type Counter flow Heat exchanger material Polystyrene in case of using a Ø 160 to Ø 150 mm air duct Not included into the delivery set 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 temperatur...

Page 6: ...PE EC 160 485 415 554 135 5 214 577 281 152 1238 1291 VUT 600 PE EC 200 827 713 723 294 345 920 280 120 1238 1291 VUT 1000 PE EC 250 1351 608 522 431 655 1444 318 143 1349 1402 L1 ø d Ø D B1 B1 H H1 L B1 B2 B3 B4 B B5 Ø D B1 H H1 L L1 B2 B5 B3 B4 ø d VUT 600 PE EC VUT 1000 PE EC VUT 350 PE EC ...

Page 7: ...trol system components SUPPLY AIR EXTRACT AIR INTAKE AIR EXHAUST AIR The basic unit delivery set includes a remote control panel for connection to the control system inside the unit casing The unit comprises a supply and an extract centrifugal single inlet fan with forward curved blades and maintenance free EC motors with external rotor and built in overheat protection a plate counterflow heat exc...

Page 8: ...th sides of the unit 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 not connected or the connected air ducts are too short protect the unit parts from ingress of foreign objects by covering the spigots with a protecting grille or other protecting device with mesh width not more than 12 5 mm to prevent u...

Page 9: ... spiral seam air duct with the flexible one Optionally the flexible connectors may be used to prevent resonating CONDENSATE DRAINAGE The condensate drain pan in the heat recovery section is equipped with two hoses for extracting the condensed fluid outside the unit Connect the pipe U trap not included in delivery package and sewage collection system with metal plastic or rubber connecting pipes Th...

Page 10: ...t the sensor to the terminal block X1 in compliance with the external wiring diagram at page 12 DUCT HUMIDITY SENSOR INSTALLATION AND CONNECTION HV1 duct humidity sensor is a special accessory that is not included into the delivery set To install the sensor connect the humidity sensor socket connector to the socket connector inside the unit Then fix the sensor with the clamp and the holder in the ...

Page 11: ...M2 ТE2 D1 D2 F1 F2 RK1 SM1 Q1 TS1 TS2 HV1 12V AC ТE6 HV2 RS485 PD1 PD2 FUNCTIONAL DIAGRAM Designation Name Designation Name D1 Supply air damper RK1 Plate heat exchanger D2 Extract air damper SM1 Supply damper actuator F1 Supply filter SM2 Extract damper actuator F2 Extract filter SM3 Bypass damper electric actuator M1 Supply fan TE1 Outer air temperature sensor M2 Exhaust fan TE2 Temperature sens...

Page 12: ...tact from fire alarm panel NO 2х0 75 mm2 P1 Remote control 4х0 75 mm2 ТЕ1 Outdoor temperature sensor 3х0 75 mm2 MAINTENANCE The recommended maintenance periodicity is 3 4 times per year The maintenance and servicing routines include regular cleaning and the following operations 1 Filter maintenance Contaminated filters increase air resistance thus impairing supply air volume into the premises Clea...

Page 13: ...r Turn the motor as shown in the picture then remove it from the unit Installation place for 4 fixing screws of the motor Socket connector Drain pan Diffusers 3 Fan inspection once a year Even regular technical maintenance of the filters and heat exchangers may not completely prevent dust accumulation in the fans which reduces the fan capacity and impairs supply air volume into the premises Clean ...

Page 14: ...t inspect the U trap and make sure the drain line is equipped with frost protection TROUBLESHOOTING STORAGE ANDTRANSPORTATION RULES 4 Condensate drain maintenance once a year The drain pipes may get clogged with the 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 Extract and supply diffuser maintenance as requir...

Page 15: ...o the following cases User s failure to submit the unit with the entire delivery package as stated in the user s manual including submission with missing component parts previously dismounted by the user Mismatch of the unit model and the brand name with the information stated on the unit packaging and in the user s manual User s failure to ensure timely technical maintenance of the unit External ...

Page 16: ...s manual The warranty terms are acknowledged and accepted Customer s Signature The VUT ________ PE EC unit has been connected to power mains pursuant to the requirements stated in the present user s manual Installation Stamp Seller Address Phone Number Installation Technician s Full Name Installation Date Signature The unit has been installed in accordance with the provisions of all the applicable...

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