Daikin BRC7E61W User Manual download pdf (Page 22)

Heat Reclaim Ventilation

Heat Reclaim Vantilation

Improved E nthalpy E fficienc y

Higher E xternal S tatic P res s ure

E nhanc ed E nergy S aving F unc tions

41 42

Exhaust

heat

Exhaust

heat

The indoor accumulated heat is discharged at night.

This reduces the air conditioning load the next day thereby increasing efficiency.

Indoor

unit

Indoor

unit

Cold air

Generated

heat

Heat is discharged. The load is small so the temperature is rapidly reduced

to a comfortable level.

*Interlocked operation with an air conditioner

Comfortable!Comfortable!

Nighttime free cooling operation

Air conditioning load reduced by approximately 30%!Air conditioning load reduced by approximately 30%!

This unit recovers heat energy lost through ventilation and

curbs room temperature changes caused by ventilation,

thereby conserving energy and reducing the load on the air

conditioning system.

Molecule of water

Miscellaneous gas

CO2 molecule, etc.

40 µm

High-humidity air

Low-humidity air

Permselective

film

Precise, thin-film

material

Exhaust air

Supply air

Sheet structure

Outdoor

Exhaust air

Indoor

(unclean

indoor air)

Outdoor air

(fresh air)

Total heat exchange ventilation

Enthalpy efficiency drastically improved by employing

newly developed ultra-thin film element! (VAM-GJ model)

Thickness of

the partition sheet

Due to the thinner film…

•Decreases the moisture resistance of the partition sheets

drastically.

•Realises more space for extra layers in the element,

resulting in increased effective area that supply and

exhaust air can be exposed to.

Moisture absorption increased by approx. 10%!

Moisture exchange efficiency is greatly improved by using optimised

thinner films and moisture-absorption materials in the element.

Furthermore, miscellaneous gas barrier properties are maintained by

decreasing the porosity in the moisture-absorption materials.

Automatically switches the

ventilation mode (Total

Heat Exchange

Mode/Bypass Mode)

according to the operating

status of the air conditioner.

Auto-ventilation Mode

Changeover Switching

Reduces air conditioning

load by not running the

HRV while air is still clean

soon after the air

conditioner is turned ON.

Pre-cool,

Pre-heat Control

Air conditioning sensible

heat load reduced by

appr ox. 5%

20% 8%

• The air conditioning load reduction values are based on the following conditions;

Application: Tokyo office building

Building form: 2 floors above ground, 6 floors underground, floor area 2,100 m

Personnel density: 0.25 person/m

Ventilation volume: 25 m

Indoor air conditioning level: summer 25°C 50% RH, intermediate seasons 24°C 50%

RH, winter 22°C 40% RH

Operating time: 2745 hours (9 hours per day, approx. 25 days per month)

Calculation method: simulation based on "MICRO-HASP/1982" of the Japan

Building Mechanical and Electrical Engineers Association.

VAM-GJ

Individual operation

Normal

ventilation fan

VAM-GJ

Interlocked operation

with air conditioner

Air conditioning load reduction (%)

20%

Air Conditioning Load

Reduced by Approximately

30%

• The air conditioning load reduction values may vary according to weather and

other environmental conditions at the location of the machine's installation.

Nighttime free cooling operation is an energy-conserving function that works at night when air

conditioners are off. By ventilating rooms

containing office equipment that raises the

room temperature, nighttime free cooling

operation reduces the cooling load when

air conditioners are turned on in the

morning. It also alleviates feelings of

discomfort in the morning caused by heat

accumulated during the night.

•

Nighttime free cooling operation only works to cool and if connected to

Building Multi or VRV systems.

•

Nighttime free cooling operation is set to “off” in the factory settings, so if

you wish to use it, request your dealer to turn it on.

*1 This function can be operated only when interlocked with air conditioners.

*2 Value is based on the following conditions:

•Cooling operation performed from April to October.

•Calculated for air conditioning sensible heat load only

(latent heat load not included).

Energy ConservationCompact Equipment

Cold Climate Compatible

The HRV Creates a High-Quality Environment

by Interlocking with the Air Conditioner

306 mm

Air conditioning load reduced by approximately 30%!With a height of just 306 mm, the unit easily fits in limited

spaces, such as above ceilings.

-20 -10 0 10 20 30 40 50

50˚CDB-15˚CDB 50˚CDB-15˚CDB

*For VAM500GJVE

VAM150GJVE, VAM250GJVE, VAM350GJVE,

VAM500GJVE, VAM650GJVE, VAM800GJVE,

VAM1000GJVE, VAM1500GJVE, VAM2000GJVE

Model Numbers

Indoor unit

Daikin air conditioner

LCD remote controller

for indoor unit

• Operating mode signal

• Filter cleaning signal

• Failure detection signal

• ON/OFF signal

• Cooling/Heating mode signal

• Set temperature signal

• Ventilation signal

• Humidifier ON/OFF signal

HRV

InterlockingInterlocking

Standard operation at

temperatures down to -15°C.

This new series provides higher enthalpy efficiency , due to the greatly enhanced performance of the new ultra-

thin film element. Furthermore, improved external static pressure offers more flexibility for installation. Along

with these three outstanding improvements, Daikin’s exclusive function—nighttime free cooling

operation—contributes to energy conservation and more comfortable space.

For models: VAM150/250/350/650/800/1000/2000GJVE

For models: VAM150/350/500GJVE

(Fresh air from

outdoors)

(Supply air

to room)

(Exhaust air to outdoors)

(Return air

from room)

Compliant with the RoHS Directive*

* RoHS Directive: The RoHS (Restriction of Hazardous Substances (in electrical and electronic equipment)) Directive is an environmental directive enacted to regulate the use of designated

chemical substances (lead, cadmium, hexavalent chromium, mercury, polybrominated biphenyls and polybrominated diphenylether) in electrical equipment. All household

products subject to this Directive and sold in Europe from July 1, 2006 are legally bound to comply with the RoHS Directive.

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