Product information - Version 3 VEX340 Air handling units with counter flow heat exchangers VEX340: 400-2250 m3/h
Table of contents VEX340 energy-efficient unit VEX340 (400–2250 m3/h) .............. 4 Highly-efficient counter flow heat exchangers - Technical data ............................................................ 4 - Capacity curves – compact filters ................................ 5 - Temperature efficiency ............................................... 5 - Sound data ................................................................. 6 - Water heating coil / motor valve data ........................
- 85% temperature efficiency or greater ..! Two counter flow heat exchangers create a unit that has an extremely high temperature efficiency and low pressure loss. - 80-85% efficiency without condensation - Up to 94% efficiency with condensation Please contact us if you need an extra fast delivery time Cabinet The cabinet is made of Aluzinc® AZ185 corrosion class C4 and is insulated with 50 mm mineral wool.
VEX340 VEX340 Technical data (400–2250 m3 /h) Unit data Absorbed power Max. phase current Power supply 1.8 kW 13.0 A (Power consumption is not sinusoidal) 1 x 230 V + N + PE ~ 50 Hz Principal dimensions, excl. spigots and cable duct.
VEX340 Capacity curves VEX340 VEX340 Capacity curve with F5 filters Capacity calculations are based on conditions given on our website. To calculate capacity data, use our product calculation software on our website.
VEX340 Sound data VEX340 LWA1 - Suction side VEX340 VEX340 LWA2 - Pressure side Pressure side (supply air/exhaust air): Suction side (outdoor air/extract air): Surroundings: LW1 = LWA1 + K W LW2 = LWA2 + K W LW3 = LWA3 + KW LWA1 read from graph LWA2 read from graph LWA3 read from graph K W read from table K W read from table KW read from table VEX340 LWA3 - Surroundings KW (dB) LW2 LW3 63 125 250 500 1K 2K 4K 8K I 18 8 -11 1 -12 -20 -25 -32 II 21 11 -1 -2 -11 -21 -27
HCW340 Technical data for water heating coil – accessories Calculation example for water heating coil Test pressure Max. operating pressure Number of rows of pipes Number of circuits Face area (HxW) Pipe connection Fin spacing Weight (without fluid) Water content Conditions Water supply temperature Water return temperature Tolerance of calculated results Volume flow ratio Heat recovery 3000 kPa 1600 kPa 1 2 420 x 520 mm DN15 (1/2’’) 1.6 mm 15.5 kg 1.3 l 60 °C 40 °C ± 10 % 1.
CCW340 technical data for cold water coil – accessories VEX340 Technical Data Test pressure Max. operating pressure Number of rows of pipes Number of circuits Face area (HxW) Pipe connection Fin spacing Weight, non-insulated (without fluid) Weight, insulated model (without fluid) Water content Capacity diagrams for cold water coil 3000 kPa 1600 kPa 4 8 500 x 610 mm DN25 (1’’) 2.8 mm 39 kg 72 kg 3.
VEX340 Dimensioned sketches 62 62 VEX340 Horizontal, Right 17651765 62 62 Left Left 415 415 202 202 1,2 1,2 Exhaust Exhaust air air 62 62 1,2 1,2 Exhaust Exhaust air air N N M M N N 1,1 1,1 Extract Extract air air 2,2 2,2 Supply Supply air air 17651765 168 168 415 415 2,1 2,1 Outdoor Outdoor air air 2,1 2,1 Outdoor Outdoor air air M M 62 62 Right Right 2,2 2,2 Supply Supply air air 1,1 1,1 Extract Extract air air DN15(½") DN15(½") DN15(½") DN15(½") N N M M 946 1) 946 1) Cold wate
EXact control system Behind every operation, the advanced EXact control ensures the air handling unit operates as effectively and economically as possible. The control can easily be adjusted to the daily rhythm of the location, whether it is a school, office or residence.
Connection to external units The EXact control system meets every control requirement for maintaining a perfect indoor climate Web server Internet (TCP/IP) The EXact control system is supplied with a web server (TCP/IP). This enables various options: TCP/IP Modbus Router 1. The unit can be monitored and configured using a local PC. 2. The unit can be connected to a local area network (LAN) and any PC connected to LAN. 3. The unit can be connected to the internet and external internet-enabled PCs.
Innovative ice detection and control Frost protection To ensure EXHAUSTO counter flow heat exchangers can operate in areas that have low outdoor temperatures EXHAUSTO has developed a unique extract air system. Highly efficient counter flow heat exchangers can be prone to icing as the air extracted from a room can contain moisture. When the energy from this extracted air is used (when the air cools), the moisture condenses to water vapour, which collects in the heat exchanger.
Innovative ice detection and control Return air principle Outdoor air +15°C -6°C 100% +22°C -1°C Extract air 30% 130% +2°C +15°C 100% Fan 2 Fan 1 Supply air Energy calculations Minimal heat loss with VEX340 Ventilation and airing out can be a major source of energy loss from a building. To maintain good indoor air quality it is necessary to continually replace the air, so that moisture and odours can be removed from a room.
EXact control system - List of functions VEX340: Control system The table below describes the control system functions. More detailed descriptions of selected functions are shown on the following pages.
EXact control system - List of functions for accessories HCW - External water heating coil Function / component Description Temperature sensors 1. In the supply air duct to measure/control supply air temperature 2. On the return pipe from the water heating coil to keep the heating coil warm and protect it from icing 3. To protect external piping linked to the heating coil from icing 4.
AIRFLOW CONTROL Regulation principles Room temperature or supply air temperature regulation can be selected. The control system regulates temperature using heat/cold recovery and controls external cooling/heating coils or cooling unit if the cooling/heating demand is greater. Regulating room temperature The room temperature is regulated using the unit's built-in temperature sensor in the extract air spigot or an external room/duct sensor. Room temperature summertime compensation is also available.
Technical specifications, modules CONNECTION BOARD MIO (Modbus Input Output) Power supply 24 V DC Analogue input 0-10 V DC ON/OFF 24 V DC Analogue output 0-10 V DC Max. power consumption 0.3 A Digital input 24 V DC BT (fire thermostat/smoke detector) Max. 4 A breaking current Digital output open collector 1 A START/STOP Digital input Relay output 250 V max. 8 A, AC1 Change-over relay.
Overview of simplified diagram abbreviations. The VEX340 is supplied with components fitted in the unit or for fitting in the duct system and room. The simplified drawing on the next page show components that can be included in a VEX340 air handling unit. Abbreviation The table lists the components for the VEX340. Accessories must be ordered separately.
VEX340: General Simplified diagram 19
Cable plans Dimensioning of cable and fuses A maximum of one HCW (heating coil) and one CCW/XCU (cooling) can be connected. The EXact control prevents both operating at the same time. The electrician installing the unit is responsible for ensuring that all sizes used are compatible with current legislation and regulations. HCE-type accessories must have a separate power supply. The VEX340 heat recovery unit has a built-in isolation switch and automatic fuses for overload and short-circuit protection.
Cable plans VEX340 with external heating coil - Water heating coil (HCW) / cold water coil (CCW) Size VEX340 Current (V) Dimensioned power consumption (A) (max. phase current) 1 x 230 V + N + PE 13 VEX340: General VEX340 with external heating coil – Electrical (HCE) VEX340 / HCE340 Size Current (V) Dimensioned power consumption (A) (max. phase current) VEX340 1 x 230 V + N + PE 13 HCE340 3 x 400 V + N + PE 8.
VEX340: General Cable plan - Accessories Abbreviation Term ALARM BT40 BT50 BT70 HMI LS LS LSR MCCW MHCE MHCW MIO-CO2 MIO-PIR MIO-RH MIO-TS MPT-DUCT MXCU Smoke detector Alarm relay Overheating thermostat 40 °C Overheating thermostat 50 °C Overheating thermostat 70 °C Control panel Closing damper, exhaust air Closing damper, outdoor air (a requirement of a water heating coil installation) Closing damper, exhaust air/outdoor air (spring return) Cold water coil, automatic Electrical heating coil, automatic
VEX340 - outdoor installation Separate cover for outdoor installation The cabinet is insulated with 50 mm mineral wool and therefore well-suited to outdoor installation. Cover's middle section can open, giving access to the control system. A unit that is installed outdoors is supplied with a fitted cover. The cover is designed so that cables can be led under the cover on both sides, and at the back of the unit.
3003601 - 04.2011 - We reserve the right to make changes without notice. EXHAUSTO - indoor air quality makes a difference Technologies System solutions Indoor air quality competences EXHAUSTO provides three technologies within heat recovery, cross-flow heat exchangers, rotary heat exchangers and counter flow heat exchangers. The three technology platforms have their own unique advantages and applications.
