Heat Exchange Ventilation

Heat Exchange Ventilation

The principle . . . . . .

increase or decrease humidity

ventilation without loss of heat

recovery of thermal energy

potential to reduce air conditioningsystem requirements

Heat Exchange Ventilation

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

Heat Exchange Ventilation

Five models . . . . . .

VN-250SEVN-350SEVN-500SEVN-800SEVN-1KSAE

Heat Exchange Ventilation

Heat exchange Normal

Air volume (m3/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 ModeVN-250SEFan speeds

90 118 128 90 114 128

37 100 125 37 100 125

21 26 28 21.5 26.5 28

75 75 75 - - -

Heat Exchange Ventilation

Heat exchange Normal

Air volume (m3/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 ModeVN-350SEFan speeds

132 149 178 131 145 176 43 90 155 43 90 155 23 30 33 23 30 33

79 75 75 - - -

Heat Exchange Ventilation

Heat exchange Normal

Air volume (m3/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 ModeVN-500SEFan speeds

162 202 244 161 196 243

33 85 165 33 85 165

23 31 35 24 33 36

79 75 75 - - -

Heat Exchange Ventilation

Heat exchange Normal

Air volume (m3/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 ModeVN-800SEFan 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 - - -

Heat Exchange Ventilation

Heat exchange Normal

Air volume (m3/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 ModeVN-1KSAEFan 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 - - -

Heat Exchange Ventilation

Supply air

Heat exchanger element

Return air

Control pcb

Heat Exchange Ventilation

Exhaust air

Heat exchanger element

Outside air

Heat Exchange Ventilation

Removable, washable air filters

Heat Exchange Ventilation

Heat exchanger element (removed for cleaning)

Heat exchanger element access door

Heat exchanger element

Heat Exchange Ventilation

Operation switch

230v 50Hz power supply

Airflow switch (low)

Airflow switch (high)

Damper changeover switch

Electrical connections

Heat Exchange Ventilation

Fan speed connections

CN8 + CN6 = high speed

CN7 + CN5 = extra high speed

Heat Exchange Ventilation

Operating conditions

Outdoor air Minimum -10oC

Maximum +40oC

Maximum RH 85% or less

Indoor air Minimum -10oC

Maximum +40oC

Maximum RH 85% or less

Heat Exchange Ventilation

Installation

Power supply 230 vac 50Hz 1 ph & ground

Supply cables 1.5mm2

Standards Installation should comply withall 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

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 fixedusing 10mm or 12mm diameter drop rods

Ensure that adequate service access is provided for filter and heat exchangerelement removal

Heat Exchange Ventilation

Installation

Ductwork connections (supply and return)

VN 250SE 150mm diameter

VN 350SE 150mm diameter

VN 1KSAE 250mm diameter

VN 800SE 250mm diameter

VN 500SE 200mm diameter

All external ductwork must be insulated to prevent condensation

All external ductwork joints must be taped to prevent air leakage

Start up

Heat exchanger operation Check damper position is correct (towards control box)

Ventilation operation Check damper position is correct (away from control box)

Air flow switch Check fans operate in high and low speeds during both heat exchanger and ventilation modes

Heat Exchange Ventilation

Heat Exchange Ventilation

Heat Exchange Ventilation