1. Heat Exchange Ventilation Heat Exchange Ventilation

2. The principle...... increase or decrease humidity ventilation without loss of heat recovery of thermal energy potential to reduce air conditioning system requirements Heat Exchange Ventilation

3. Heat Exchange Ventilation Fresh air ventilation increasingly required on internal rooms without window access 23ºC 18ºC 0ºC Example: Heating Mode Helps prevent “sick building syndrome” Reclaims 20-50% of the energy lost by ventilation Improves energy efficiency, especially during hot and cold seasons

4. Heat Exchange Ventilation Five models...... VN-250SE VN-350SE VN-500SE VN-800SE VN-1KSAE

5. Heat Exchange Ventilation Heat exchange Normal Air volume (m 3 /h) Input power (w) Low High Extra high Low High Extra high External static (pa) Noise level (dB) Temperature exchange efficiency(%) 170 250 250 170 250 250 Ventilation Mode VN-250SE Fan speeds 90 118 128 90 114 128 37 100 125 37 100 125 21 26 28 21.5 26.5 28 75 75 75 - - -

6. Heat Exchange Ventilation Heat exchange Normal Air volume (m 3 /h) Input power (w) Low High Extra high Low High Extra high External static (pa) Noise level (dB) Temperature exchange efficiency(%) 240 350 350 240 350 350 Ventilation Mode VN-350SE Fan speeds 132 149 178 131 145 176 43 90 155 43 90 155 23 30 33 23 30 33 79 75 75 - - -

7. Heat Exchange Ventilation Heat exchange Normal Air volume (m 3 /h) Input power (w) Low High Extra high Low High Extra high External static (pa) Noise level (dB) Temperature exchange efficiency(%) 310 500 500 310 500 500 Ventilation Mode VN-500SE Fan speeds 162 202 244 161 196 243 33 85 165 33 85 165 23 31 35 24 33 36 79 75 75 - - -

8. Heat Exchange Ventilation Heat exchange Normal Air volume (m 3 /h) Input power (w) Low High Extra high Low High Extra high External static (pa) Noise level (dB) Temperature exchange efficiency(%) 575 800 800 575 800 800 Ventilation Mode VN-800SE Fan speeds 367 399 445 362 392 438 35 55 90 35 55 90 33 37 38.5 33.5 37.5 39 76 75 75 - - -

9. Heat Exchange Ventilation Heat exchange Normal Air volume (m 3 /h) Input power (w) Low High Extra high Low High Extra high External static (pa) Noise level (dB) Temperature exchange efficiency(%) 810 1000 1000 810 1000 1000 Ventilation Mode VN-1KSAE Fan speeds 367 399 445 362 392 438 35 55 90 35 55 90 33 37 38.5 33.5 37.5 39 76 75 75 - - -

10. Heat Exchange Ventilation Supply air Heat exchanger element Return air Control pcb

11. Heat Exchange Ventilation Exhaust air Heat exchanger element Outside air

12. Heat Exchange Ventilation Removable, washable air filters

13. Heat Exchange Ventilation Heat exchanger element (removed for cleaning) Heat exchanger element access door Heat exchanger element

14. Heat Exchange Ventilation Operation switch 230v 50Hz power supply Airflow switch (low) Airflow switch (high) Damper changeover switch Electrical connections

15. Heat Exchange Ventilation Fan speed connections CN8 + CN6 = high speed CN7 + CN5 = extra high speed

16. Heat Exchange Ventilation Operating conditions Outdoor air Minimum -10 o C Maximum +40 o C Maximum RH 85% or less Indoor air Minimum -10 o C Maximum +40 o C Maximum RH 85% or less

17. Heat Exchange Ventilation Installation Power supply 230 vac 50Hz 1 ph & ground Supply cables 1.5mm 2 Standards Installation should comply with all national and local electrical codes & standards as required Isolation The power supply should be Isolated and the unit protected with the correctly sized isolator and mcb

18. Heat Exchange Ventilation Installation The unit is fitted with four support brackets which must be used for fixing the unit. It is recommended that the unit is fixed using 10mm or 12mm diameter drop rods Ensure that adequate service access is provided for filter and heat exchanger element removal

19. Heat Exchange Ventilation Ductwork connections (supply and return) VN 250SE150mm diameter VN 350SE150mm diameter VN 1KSAE250mm diameter VN 800SE250mm diameter VN 500SE200mm diameter All external ductwork must be insulated to prevent condensation All external ductwork joints must be taped to prevent air leakage

20. Start up Heat exchanger operationCheck damper position is correct (towards control box) Ventilation operationCheck damper position is correct (away from control box) Air flow switchCheck fans operate in high and low speeds during both heat exchanger and ventilation modes Heat Exchange Ventilation

21. Heat Exchange Ventilation Heat Exchange Ventilation