Bus Air Conditioning

Renowned for our quality and reliability, DENSO’s experience as a supplier of bus a/c systems is bolstered by well over 50 years of engineering, technical and manufacturing development; which, when bundled into our all new LD9 system, offers our customers tremendous advantages.

The introduction of brushless motors for the evaporator and condenser fans, enables the new LD9 system to achieve high cooling performance and air flow volumes capable of withstanding extreme ambient temperatures of up to 50° C.

With over 50,000 units currently operating in bus applications, the highly anticipated DENSO 75BU33 compressors, with swashplate variable capacity 60-333cc/rev produce stable temperature control, fuel savings and proven reliability.

DENSO’s advanced production processes enable our evaporator and heaters to be developed with inner grooved tubes to aid heat transfer. Whilst our highly efficient multi-flow condenser comes equipped with subcooler. Not only does the LD9’s slim functional design provide smooth exterior aesthetic integration, but also ensures that the air intake is directly channelled into the ducting eliminating the need for obtrusive sub-ducts.Like its predecessor, the LD9 continues to outperform its rivals in environmental responsiveness with an increase in refrigeration cycle efficiency and light weight construction.

When it comes to service and repair, the new LD9 system reduces maintenance costs by utilising brushless motors, all backed by a rapidly expanding Australia-wide service dealer network.The result is an integrated and efficient bus air-conditioning system that delivers high thermal comfort and air quality with the lowest cost of ownership in the market.


LD9

Roof UnitMax. Cooling Capacity40kW34,300 kcal/h (J.I.S)
Max. Air Flow6,600 m3/h (Free Blow)
Weight175kg
SizeL 3720mm x W 2000mm
Electric Power Consumption72.5 amp (at 24 V DC)
Heating CapacityHot Water Heating32.5kW
RatedAt 15 litres/minute coolant flow rate and 38oC temperature
difference between coolant and air inlet
CompressorModel6C500
Duel Compressor7SBU33 - 330cc
Compressor Oil Type
CondenserTypeAll aluminium multi-flow type
Condenser Fan and MotorFanPropellor fan type
MotorBrushless - 20, 000 hrs life minimum
No. of Units3 pcs


Evaporator Fan and 
MotorBrushless - 20, 000 hrs life minimum
No. of Units6 pieces


Service & SupportDENSO global network assures full support on warranty service, installation and maintenance.


LD8u

Roof Unit Max. Cooling Capacity 35kW 28,000 kcal/h (J.I.S)
Max. Air Flow 6,600 m3/h (Free Blow)
Weight 175kg
Size L 3720mm x W 2000mm
Electric Power Consumption 65 amp (at 24 V DC)
Heating Capacity Hot Water Heating 32.5kW
Rated At 15 litres/minute coolant flow rate and 38oC temperature
difference between coolant and air inlet
Compressor Model 6C500
Displacement 495cc
Compressor Oil Type ND-Oil 8
Condenser Type All aluminium multi-flow type
Condenser Fan and Motor Fan Propellor fan type
Motor Ferrite motor (DENSO 112F)
No. of Units 3 pcs
Power Consumption 480 watt (160w x 3)
Evaporator Type Copper tube and aluminium fin type
Evaporator Fan and Motor Fan Sirocco fan type
Motor Ferrite motor (DENSO T70F)
No. of Units 8 pieces
Power Consumption 1120 watt (140w x 8)
Expansion Valve Type External equalizer type
Dryer Contents Zeolite (cartridge type)
Receiver Tank Type Horizontal
Piping Refrigerant rubber hoses and copper pipes
Refrigerant Type R134a
Amount (Approx) 4.9kg (one cycle)
Service & Support DENSO global network assures full support on warranty service, installation and maintenance.