AAF International Type N RotoClone - Manual (Page 4)

4
Figure 3. Cutaway section of typical Type N RotoClone
with Design “L2” Ejector and Design 4 and 5.
Sizes 16 through 48.
Fan Outlet
Clean Air Transition
Entrainment Baffles
Collecting Section
Impeller
Hopper
Lower Ejector
Shafts Mounted
Internally
RotoClone Inlet
Upper Ejector Shaft
Paddle Scraper
Design “L” Sludge Ejector
C. Lubrication
1. All bearings on the sludge ejector are ball bearings packed with
grease before leaving the factory. Do not add grease during
installation. See Maintenance Instructions, A-4 for greasing
instructions and schedules.
2. Gear reducer on sludge ejector drive was filled with oil before
shipment. Check for proper oil level. See Maintenance
Instructions, A-4.
NOTE: To prevent loss of oil while units are in transport, the
reducers are shipped with a brass pin in vent or filler plug. This
pin must be removed before the reducer is operated.
D. Duct Connections
In order to prevent surging within the RotoClone, four to five duct
diameters length of straight run prior to the inlet will provide uniform
distribution at the inlet. If an elbow is required due to space limitations,
turning vanes must be used in the elbow to evenly distribute the air
and prevent surging.
Inlet and exhaust duct must be supported from floor, wall or ceiling;
not from RotoClone or exhauster. Depending on the application and
local conditions, the discharge from the exhauster may be returned to
the workroom or discharged to the atmosphere. It may be desirable
to have both outside and inside discharges fitted with a selective
damper. This will save heat during the winter with recirculation and aid
ventilation by discharging outside during the summer months. Where
discharge duct is required, it should extend above adjacent roof lines
and should discharge vertically upward. As long as there is a drain in
the fan housing, a raincap or weather hood need not be used. Cross-
section of the discharge duct should not be less than the exhauster
outlet area.
E. Water Supply Connection
Connect a 1" line for Size 1
1 ⁄
2
thru 6 or a 2" line for Sizes 8 and larger
at point shown on Figure 4.