MQL • GUIDE SPECIFICATIONS
2.0Fan decks shall be internally spring isolated
3.0 Each unit shall have one fan wheel and housing only.
4.0Fan wheels shall be designed for continuous operation at the maximum rated fan speed and motor horsepower. Fan wheels and shafts shall be selected to operate at least 25% below the first critical speed, and shall be statically and dynamically balanced as an assembly.
5.0 Fan shafts shall be solid steel, turned, ground and polished.
6.0Fan bearings shall be
7.0Fan motor shall be mounted within the fan section casing. Motor shall be NEMA Design B with sizes and electrical characteristics as shown on the equipment schedule.
8.0Fan drive shall be designed for a minimum of 1.15 service factor and shall be factory mounted and aligned. Belt drive package shall be
D.Coil Sections:
1.0All coils shall have aluminum plate fins mechanically bonded to
minated test tank. Copper tubes shall be either 0.016” or 0.025” copper tube wall thickness. Coils shall have G90 galvanized steel or stainless steel casings with copper headers and sweat connections.
2.0Chilled water coils shall have a working pressure of
3.0
4.0Hot water coils shall have a working pressure of
5.0Steam distributing coils (standard single tube type) shall have a maximum working pressure of
6.0Electric heat coils for use in blower coil units shall be open coil type, nichrome wire resistance elements, insulated by floating ceramic bushings. Thermal cutouts for primary and secondary
E.Filter Sections:
1.0Each filter section shall be designed and constructed to house the specific type of filter specified on the equipment schedule.
2.0Flat filter sections shall accept
3.0Angle filter section shall accept
F.Damper Sections:
1.0Mixing boxes, filter mixing boxes and economizers shall have parallel blade, interconnecting dampers. Damper blades shall have parallel bends for stiffness and shall be mechanically fastened to steel rods rotating in brass bushings and mounted in rigid galvanized steel frames. Dampers shall be sectionalized to limit blade width, minimize blade warpage, and ensure tight closure.
2.0All dampers for mixing boxes and filter mixing boxes shall be rated with a leakage rate not to exceed 5% of air quantity calculated at 2000 fpm velocity though damper and
G.Access Sections:
1.0Access sections shall be installed where indicated on the drawings and shall be as specified on the equipment schedule.
2.0 Access sections shall have removable access panels.
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