HVAC Motor Series

ATT Heating, Ventilation, and Air Conditioning (HVAC) Series motors are designed with dynamically balanced rotors for reduced vibration and quiet operation. They include heavy duty industrial designs as well as designs for commercial applications.

These applications include ventilators, direct drive and belted fans, exhaust fans, unit heaters, air conditioning units, and commercial refrigeration condensers. Also included are motors designed especially for use with variable speed drives (VSDs) that are used to conserve electricity.

STANDARD SPECIFICATIONS

Item	Standard Specifications
Type of Motor	Totally Enclosed Air Over (TEAO) Squirrel Cage Cast Iron / Aluminium Induction Motor
Design Standard	IEC 60034-1
Framesize	80-355L
Voltage and Frequency	Standard stock available are: 220-240/380-415V/50Hz for 2.2 KW & below 380-415/660-720V/50Hz for 3KW & above Other voltages & frequency such as 200V, 346V, 440V & 60Hz can be supplied on request
Power Conditions	± 5% of rated voltage; ± 1% frequency and ± 1% phase unbalance
Efficiency Standard	IE1 / IE2 / IE3 (IEC 60034-30-1)
Time Duty	Continuous S1
Cooling Method	TEFC (IC 411); TEAO (IC 418)
Method of Starting	Full voltage direct on line starting or star-delta starting
Insulation & Temperature Rise Class	Class F insulation and Class B temperature rise
Degree of Protection	IP55
Rotor Winding	Squirrel cage, aluminium conductor with end-ring and wafter blades integrally cast
Environmental Conditions	Place: Non-hazardous, shaded Ambient temperature: -20°C to 40°C Relative humidity: Less than 90% relative humidity (non-condensation) Altitude: Up to 1,000 metres above sea level
Direction of Rotation	Standard motors are suitable for operation in either direction of rotation of shaft. Direction of rotation can be reversed by interchanging any two of the power lines.
Test Procedure	IEC and full voltage measuring starting operation
Fan Cover	Pressed steel
Shaft	Carbon Steel, round shaft with key
Bearing	Grease pre-packed shielded ball bearing
Lubrication	Lithium-base grease (Shell Alvania R3)
Painting	Phenolic rust-proof base plus lacquer surface finish. Painting in ATT Blue
Ground Terminal	NE set inside the terminal box

Other Options Available (Contact ATT to inquire for other options)
Accessories	Can be supplied with separate terminal box and 1 meter extended lead wires
VSD Driven	Inverter duty motor suitable for VSD operation
Heaters	Space heaters (110V/220V/1ph) or winding heaters available on request
Thermal Protection	PTC thermistor 150°C
Insulation Class	Class H
Degree of Protection	Up to IP66

MOUNTINGS

The table below contains the various types of mounting available for HVAC Motor Series. If you are unable to find the dimensions to the mounting you prefer, please contact us for the outlining dimensions