The following general specification pages have been developed so that designers can quickly access and use relevant product information relating to MacroAir HVLS fans.
Designers are welcome to copy / paste as required for project specific documentation.
Please note that the whole of this document is copyright protected and any reproduction of content must pertain to MacroAir products only.
For assistance with the specification of MacroAir HVLS fans in Australia, New Zealand,
Indonesia and the South Pacific Islands, please contact Pacific HVAC Engineering.
PACIFIC HVAC ENGINEERING
2/63 Wells Road
CHELSEA HEIGHTS 3196
VICTORIA AUSTRALIA p. +61 (0)3 9773 3200 e. info@pacifichvac.com
w. www.pacifichvac.com
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1.1 HVLS FAN SPECIFICATION
High volume, low speed fans shall be large diameter, six blade units mounted to the ceiling support structure. The HVLS fans installation shall provide low velocity, high volume air circulation for cooling and/or destratification heating. Variable speed control shall be offered as part of the finished installation for user selection of operating air velocity.
1.2 SPECIFICATION SCOPE a. Industrial and commercial ceiling fans.
1.3 SUBMITTALS a. Product Data: Manufacturer's data sheets on each product to be used, including: i.
ii.
Preparation instructions and recommendations.
Storage and handling requirements and recommendations. iii.
Installation methods.
1.4 QUALITY ASSURANCE a. Manufacturer Qualifications: All primary products specified in this section will be supplied by a single manufacturer with a minimum of ten (10) years experience. b. Installer Qualifications: All products listed in this section are to be installed by installers with a minimum of five (5) years demonstrated experience in installing products of the same type and scope as specified.
1.5 DELIVERY, STORAGE, AND HANDLING a. Store products in manufacturer's unopened packaging until ready for installation. b. Store and dispose of waste materials and packaging in accordance with requirements of local authorities.
2.1 MANUFACTURER a. Acceptable Manufacturer: Pacific HVAC Engineering , which is located at: 2/63 Wells Road, Chelsea Heights, Victoria, Australia 3196; Toll Free 1300
733 833; Email: mailto:info@pacifichvac.com
Web: pacifichvac.com
b. Substitutions: Not permitted.
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2.2 FAN COMPONENTS a. Blade Material
The blades shall be fabricated from precision extruded aluminium alloy with high performance Aerofoil profile design for efficient air movement. b. Blade Finish
The blade finish shall be natural anodised or polyester powder coat in selection colour. c. Hub
The hub shall be made from aluminium alloy for high strength and light weight. It shall be secured to output shaft of gearbox using a taper lock fitting. d. Gear Box
The gearbox shall be of a high efficiency type with a reduction ratio matched to the rotational speed of the designed fan’s diameter. Gears are to be of a two stage helical cut design for long life and silent running at all speeds. Gear box casings shall be either cast iron or aluminium incorporating long life bearings. Lubrication shall be high-grade, low foaming oil with extreme pressure additives and a wide temperature range. e. Motor
The fan motor shall be a high efficiency EC (Electronically Commutated) permanent magnet DC type manufactured by ebm-papst, Germany.
The rated power shall be; Single Phase; 200 - 277V, 50 – 60 Hz or Three
Phase 380 – 480V, 50 – 60Hz. The IP rating shall not be less than 55.
The motor shall have the following technical features;
Input for sensor 0-10 V or 4-20 mA
External 24 V input (programming)
Alarm relay
Integrated PID controller
Motor current limit
RS485 MODBUS RTU
Soft start
Control input 0-10 VDC / PWM (Infinite Variability)
Over-temperature protected electronics / motor
Line under voltage / phase failure detection f. Control Unit
The control unit shall be mounted remotely from the fan unit with connection to the motor on board electronic controls via Cat 6 Ethernet cable. The Controller shall offer analogue control for Manual / Auto operation, On / Off and Variable speed control. The control box shall incorporate an internal USB port for connection to PC based motor diagnostic software allow simple fault detection and access to motor operation logs. g. Mounting System
The mounting structural elements shall be fabricated from low carbon square steel tube and plate with powder coat finish for long life corrosion
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resistance. The mounting system shall provide quick, secure attachment to structural support beams. A proprietary double pivot link design shall be used to ensure perpendicular installation of the fan unit and balanced operation.
2.3 SAFETY FEATURES a. The fan mounting system assembly shall be secured to the building structural member with an independent galvanised steel safety cable.
The cable shall be designed to carry the full weight of the fan unit in the event of a failure of any of the primary mounting elements. b. The fan hub shall incorporate a patented interlock design to prevent the impeller disengaging from the body assembly in the event of a gear box shaft failure. c. The fan blades shall be secured by a two stage retention system incorporating proprietary safety links. d. Fans shall be secured to the building structure with radially placed guy wires to prevent lateral movement or vibration of the fan assembly.
3.1 GENERAL a. QUALIFIED PERSONS
Installation work shall only be carried out by persons skilled and qualified to work with electrical / mechanical products in compliance with local regulations. b. MANUFACTURERS MANUALS AND INSTRUCTIONS
In all instances, the manufacturer’s manuals and installation instructions must be adhered to. Where there is a conflict between this specification and the manufacturer’s manuals and instructions, the manufacture’s documentation shall take precedence.
3.2 DESIGN RECOMMENDATIONS a. Guidelines for Positioning Fans
Check the installation area to determine clearances around the fan. The optimal mounting height is 1.5 – 2 times the diameter of the fan (fans can be mounted up to 15m above ground level). b. Mounting Requirements i.
The blades of the fan must be at least 3m above floor level. ii.
The blades must be at least 0.6m away from vertical and horizontal features
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iii.
The blades must be at least 1.5m away from the edge of a mezzanine floor if less than 3m above the floor level. iv.
Roof / Ceiling clearance must greater than 15% of the fan diameter ( as an average – if the roof is sloping part of the fan can be closer) v.
The fan must be mounted between and preferably above lighting fixtures to prevent shadow strobing. vi.
Smoke Detectors shall be mounted at least 1m outside the sweep of the fan blades vii.
The hub of the fan shall be at least 1.5m from sprinkler heads, blades shall be at least 0.9m from sprinkler heads viii.
Any local regulatory and legislative and insurance guidelines must be adhered to. ix.
The fan must be attached to a primary building structure that is rated for the weight of the fan unit. Typically, “I” beams are the preferred support structure. Advice should be sought from Pacific
HVAC Engineering or a suitably qualified structural engineer for installations to non primary structural elements.
© Pacific HVAC Engineering 2013 Pacific HVAC Engineering +61 (0)3 9773 3200 www.pacifichvac.com