AAF International Type LVN RotoClone - Manual (Page 2)

Figure 2
Typical Type N
RotoClone Model LV.
2
control. The regulator should be set at 5 psi. A solenoid valve is
also provided. It is to be interlocked with the fan motor starter. The
solenoid valve prevents overfilling during shut down. Controls also
include a low water level switch and timer.
C. Level probe control (Model A) – Includes an electronic level
controller, level probe, solenoid valve and timer/relay to shut the unit
down when water level in the RotoClone is too low. The water level
controller and timer/relay are housed in a NEMA 4 control box,
shipped separately. The water level controller actuates the solenoid
valve when water level does not touch the electronic probe for more
than 2 minutes (the time delay minimizes solenoid “chatter”), and
allows the solenoid to close when water level again touches the
probe. If water does not reach its proper level in the preset time
(usually 3 minutes), the timer/relay shuts down the system.
3.0 Operating Instructions
3.1. To Fill RotoClone
A. Close drain valve or insert drain plug (on older units without drain
valve), and open any manual valves in the supply piping.
B. Fill the RotoClone with water to approximately 1 1
2
" to 2"
below the operating level on the level indicating tube. The unit
will be marked with a horizontal line indicating “Air (Fan) On”
water level. For units with the electronic probe, water level should
be 1
1
2
" to 2" below the probe tip.
3.2 To Start RotoClone
A. Check that the water level is approximately 2" below the
operating level on the level indicating tube.
B. Make sure sludge removal door is in place.
C. Press “start” button for exhauster motor.
D. Adjust water level to the correct operating level as shown on the
level indicating tube, or until it just touches the electronic probe.
Clean Air Discharge
Sludge
Removal
Door
Water
Inlet
Water
Level
Control
Box
Piping
Fill Valve
Overflow
Drain
Set RotoClone on foundation and adjust base until unit is level.
Use care in leveling in both directions as functioning of RotoClone
depends on accuracy of this operation.
Note: This level can be checked by filling the unit with water until the level reaches the
entering edge (Figure 1) of the impeller. This entering edge should be level with the
water along its entire length with maximum variation of
1 16 " plus or minus. (See Item
1.2, Operating Principles)
2.2 Lubrication
All motor bearings are packed with grease before leaving the factory.
Do not add more grease during installation. Some motors have
lubrication plugs. They should be removed and replaced with grease
fittings. Lubricate every six months under dusty operating conditions,
and every 12 months under reasonably clean conditions.
2.3 Duct Connections
The inlet duct must be supported from the floor, wall or ceiling, not
from the RotoClone. Four (4) to five (5) inlet diameters of straight
duct, prior to the RotoClone, should be allowed to “balance out”
uneven air/dust flow from elbows branch entries or other disturbances
in front of the RotoClone.
2.4 Water Supply Connection
Units are supplied with a 1" (FPT) quick fill valve and
1
4
" (FPT)
solenoid valve for automatic water makeup. Connect supply piping
to both.
2.5 Drain Connection
A 2" (FPT) drain valve is supplied at the bottom of the hopper. Drain
piping, should be attached here and to the 1" (FPT) overflow coupling
on the side of the sludge chute.
2.6 Electrical Connections
The normal electrical connections for the RotoClone are to the
exhauster motor, water level control - solenoid valve, electronic probe
(Model A control), the electrical control box (shipped loose), and the
owner’s motor starter (the motor starter, S/S push buttons, control
transformer and disconnect are not normally supplied by AAF
International). Each connection is to be made in accordance with the
appropriate wiring schematic in the RotoClone instruction packet and
prevailing electrical codes.
CAUTION:
1. Insure that motor voltage matches line voltage, and wiring is per
diagram on motor.
2. After connecting the motor leads, insure that the motor rotates in
a clockwise direction as viewed from the top of the unit.
2.7 Water Level Control
Supply water makeup for the RotoClone is required because of water
losses due to evaporation and sludge removal. There are three types
of water level control available on the Type N RotoClone Model LV.
A. Manual control—Water is added through the sludge removal
chute. Water level is controlled to the mark found on the level
indicating tube.
B. Float valve control—A float valve is mounted within a control box
located on the side of the RotoClone. The float valve must be
adjusted to control the water level to the mark on the level
indicating tube. A pressure regulator is provided to improve level
Installation Instructions continued