SON70 Cool Only Rooftop Bus AC – 22 kW

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Description

Aurora by Autocool SON70 cool-only rooftop air-conditioning unit for midi buses of 7–8 m. Keeps the passenger area comfortable in all seasons; the temperature is set from the driver control panel. A 24 kW version with TM43 compressor is also available on request.

Complete system includes: roof unit, filter frame with 20 PPI filter, TM31 compressor, interior control panel, wiring loom and air-conditioning hoses.

Model	SON70 Cool Only
Max. cooling capacity	22 kW (24 kW version with TM43 compressor)
Application	Midi bus, 7–8 m
Supply voltage	24 VDC
Max. current	57 A
Refrigerant	R134a, charge 2.5 kg ± 250 g
Compressor	TM31 heavy-duty swash plate, 313 cc/rev, 9.5 kg, PAG oil ZXL 100 PG 500 cc
Condenser	Microchannel technology, 1480 × 400 mm
Condenser fans	3 × Spal axial, brush type, 6,840 m³/h total, 24 VDC
Evaporators	2 × copper tube & aluminium fins, 1110 × 202 mm, 5 rows, 13 FPI
Evaporator blowers	4 × Aurora brushless radial, 4,800 m³/h total, 24 VDC
Expansion valves	2 × F type, 3/8 × 1/2 × 1/4 ODF
Filter-dryer	Danfoss, flare size #8
Safety	High-pressure switch 25/19 bar; low-pressure switch 1.2/2.4 bar; 2 frost thermostats
Hoses	Suction ID 7/8", discharge ID 3/4"
Unit footprint	2,274.7 × 1,803 mm
Installation	Fixed with 6 × M8 bolts; 4 × M6 lifting points

Download the SON70 technical specifications (PDF)