| |
Canada
Blower VSBC Backward Inclined Ventilating Set
CONSTRUCTION:
American Coolair Ventilating Belt Set Type VSBC features as follows:
fan housings shall be heavy gauge, continuously welded construction.
Housings shall be suitably braced to prevent vibration or pulsation.
Housings shall have tapered spun, aerodynamically designed inlet cones
or shrouds providing stable flow and high rigidity. Housings shall be
of the rotatable design, convertible to eight standard discharge
configurations. Canada Blower VSBC backward inclined wheels shall be
single thickness plate type designed for maximum efficiency and quiet
operation and shall be of the non-overloading type. Class I wheels,
sizes 12 through 27, shall be constructed of aluminum with the blades
riveted and welded to the spun wheel cone and back plate. Class I
wheels, sizes 30 through 36, and all Class II wheels shall be
constructed of heavy gauge steel with welded (not riveted) blades.
Shafts shall be AISI 1040 or 1045 hot rolled steel, accurately turned,
ground, polished, and ring gauged for accuracy. Shafts shall be sized
for the first critical speed of at least 1.43 times the maximum speed.
Bearings shall be heavy duty, grease lubricated, anti-friction ball,
self-aligning, pillow block type and selected for a minimum average
bearing life (AFBMA L-50) in excess of 200,000 hours at the maximum fan
RPM. Motor sheaves shall be cast iron, and supplied as either variable
pitch or fixed pitch. Drives and belts shall be rated for a minimum of
120% of the required HP.
|
ACCESSORIES: When
specified, accessories such as belt guards, weather
covers, access doors, variable inlet vanes, outlet shutters, inlet
screens, etc., shall be provided by American Coolair Corporation to
maintain one source responsibility. UL705 (OPTIONAL) - Canada Blower
VSBC fans shall be listed under UL 705 for power ventilators. VSBC fans
shall include a UL listed motor, V-belt drive, special weather cover
with additional cooling louvers, and UL705 label. Disconnect switches
or other devices (not including motor) shall be field mounted and wired
in accordance with all local and national codes. UL762 (OPTIONAL) -
VSBC fans shall be listed under UL 762 for power ventilators used in
restaurant exhaust service (grease laden air). VSBC fans shall include
a UL listed motor, V-belt drive, special weather cover with additional
cooling louvers, bolted access door, drain connection, wheel back plate
fins, and UL label. Canada Blower VSBC fans shall be upblast or top
angular up discharge and shall have a discharge height of at least 40”
above the roof line. They are to be installed in accordance with NFBA
96. Disconnect switches or other devices (not including motor) shall be
field mounted and wired in accordance with all local and national
codes. FINISH AND COATING- The entire fan assembly, excluding the
shaft, shall be thoroughly degreased and deburred before application of
a rust-preventative primer. After the fan is completely assembled, a
finish coat of paint shall be applied to the entire assembly. The fan
shaft shall be coated with a petroleum-based rust protectant. Aluminum
components shall be unpainted. |
