Aaf-international Type W RotoClone User Manual download pdf (Page 6)

Figure 4 — Piping Diagram, Arrangements A and D

2.6A Pressure Switch

A switch is supplied with the RotoClone which will stop the RotoClone

motor automatically when water supply fails or water pressure falls

below 28 psi. This pressure switch should be mounted in the water

supply line as shown in Figure 1 and wired as shown in the wiring

diagram supplied with the unit. (Note: this switch is not supplied, when

“Range Hood” controls are supplied - see Section 9.2 for Range Hood

controls.)

When switch has stopped RotoClone motor because the water

pressure has dropped below 28 PSI, RotoClone cannot be started

again until water pressure has returned to not less than 30 PSI.

Switch has been adjusted at factory to operate in the range described

above. Switch setting may be checked against pressure gage reading.

To readjust, remove cover and turn adjustment screw to right or left,

using pressure gage as a guide.

2.6B FM Range Hood Controls (Optional)

These controls are designed to prevent fires in kitchen range hoods

beyond the RotoClone outlet when wired according to Drawing U48P-

46209 (except NY), U48P-1427848 (NY), U48P-1653872 (Can), or the

specific wiring diagram supplied with the unit. These controls, when

supplied, include two solenoid valves, two flow control switches (these

replace the pressure switch), Fenwal Detect-A-Fire switch,

and relays. (See Section 9.2 for additional details on this option.)

2.7 Spray Nozzles (Arrangement A)

Nozzles are installed at the factory. Connect the nozzle piping to the

fittings provided. From the strainer the main pipe leads to the conical

spray nozzle fitted in the RotoClone inlet connection. The small

Type W

RotoClone

Strainer

Solenoid Valve

(furnished when specified)

Pressure switch adjusted to 28-30 lbs.

Opens contact on low pressure.

Closes contact on high pressure.

Pressure Gage

branch line leads to auxiliary flat spray nozzle within the RotoClone

housing. Refer to installation diagram, Figure1; flat spray should be in

the 7 o’clock position with “fan” parallel to the blades of the impeller.

Spray Nozzles (Arrangement D)

Nozzles are installed at the factory. Connect nozzle piping to the

fittings provided. Refer to erection diagram, Figure 2. From the

strainer, the main line branches into two connections, one leading to

two or more vertical flat spray nozzles fitted at the precleaner inlet and

the other one to a conical spray nozzle fitted into the RotoClone inlet

connection. From this line, a small branch leads to an auxiliary flat

spray nozzle within the RotoClone housing.

2.8 Sludge Connection (Arrangement A)

The expansion chamber and outlet connection drains should

discharge to an open funnel, so if drain piping plugs up, water will run

over funnel and not back up in RotoClone which may cause damage.

See Figure 1. Piping from funnel should be equal or larger in size

than expansion chamber nipple. This connection can run to (1) sewer

or drain line, (2) process, (3) settling tank, or (4) other locations

dependent on local conditions/regulations and the amount of material

collected by the RotoClone.

(Arrangement D)

The hopper drain should discharge into an open funnel. See Figure 2.

Piping from the funnel should be equal or larger in size than the

hopper drain opening. The sludge can be disposed the same as

suggested under Arrangement A.

2.9 Drain Connection (Arrangement A)

The drain from the outlet connection, see Figure 1, should be

connected to the sludge pipe from expansion chamber or directly to a

drain. Full size piping should be used. Refer to installation diagram

Figure 1. Note that a funnel is shown under the drain. This provides

easy access to the drain if an obstruction should occur. A plugged

drain can cause the water level in the collector to rise into the impeller

and the impeller tips will break.

(Arrangement D)

The drain from the outlet connection should be piped back into the

RotoClone hopper (see Figure 2).

2.10 Emergency Overflow (Arrangement D only)

Connect pipe nipple located on hopper side to open drain funnel

using same size pipe. See Figure 2. Connection from funnel to sludge

line must be no smaller than main drain connection at bottom of

RotoClone hopper.

2.11 Bearings

RotoClone bearings are of the ball or roller-bearing type and are

packed with proper amounts of grease before leaving the factory.

Additional grease need not be added at the time of installation.

Both a “fixed” and “floating” bearing are used. For optimum life,

the “fixed” bearing is located on the outboard position (drive side).

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Aaf-international Type W RotoClone User Manual Page 6

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