Aaf-international Type W RotoClone User Manual download pdf (Page 15)

9.0 Supplements For Optional Features

9.1 Food Quality W RotoClones

“Food Quality” refers to features on the W RotoClone that make

it readily accessible for interior cleaning and exterior finishing to

facilitate washdown by minimizing surfaces that can collect and trap

material or water. These features include quick opening access doors

in the Inlet Section, Expansion Chamber, and 90° Elbow Outlet or

Centrifugal Outlet (if supplied in lieu of the standard Straight Outlet);

exterior welds ground smooth; and, construction features to eliminate

or minimize flat, horizontal surfaces. Additionally, nozzles are installed

in the Expansion Chamber and the 90° Elbow Outlet or Centrifugal

Outlet (if supplied in lieu of the standard Straight Outlet), to facilitate

removal of build up in the drain area.

9.1A Installation and Operation

Installation and Operation procedure is the same as shown in

Sections 2 and 3 of this IOM, with the exception of the requirement

for extra water connections. Additional, valved, 40 psi, water supply

connections should be made for the spray nozzle connections

(screwed coupling(s) - see general Arrangement drawing for

location(s)) in the Expansion Chamber and 90° Elbow or Centrifugal

Outlet (if other than the Straight Outlet is supplied). It is recommended

that the valves be opened intermittently, for a brief period, during

RotoClone operation and at shutdown, to facilitate flushing of material

that can accumulate and plug the drains. Frequency and duration of

the water spray must be determined individually for each RotoClone

application. (Provision can be made for automatic operation, by

installing solenoid valves, actuated by timers.)

Note: Leaving the water “on” during operation of the RotoClone

can result in water carryover in the exhaust duct; and, will result

in excessive water consumption. An empirically determined timed

sequence should be adequate to keep drains free-flowing, and

is the recommended operational approach.

9.1B Maintenance

Maintenance is the same as described in the basic IOM instructions,

section 4.0. Special attention should be paid to the spray nozzles and

areas where there are quick opening access doors. These areas often

require more frequent cleaning. It is recommended that a preventative

maintenance schedule be developed specific to each W RotoClone.

9.2 Range Hood and FM Controls

RotoClones provided with Range Hood or FM controls have slightly

different inlet piping and controls than the standard W RotoClone.

The Range Hood RotoClones have two (2) flow switches, two (2)

solenoid valves, and extra inlet nozzle(s); and, no pressure switch,

as described in the main IOM - see Figure 7. Additionally, there is

an electrical control box that houses relays and terminal strips, and

a temperature switch to be installed in the ductwork upstream of the

RotoClone. The piping assembly with the solenoid valves and flow

switches, pressure gauge and strainer, ships loose along with the

temperature switch and electrical control box - see the specific wiring

diagram in the electrical control box (or in the envelope with the other

IOM documents) for proper wiring, and sequence of operation.

Figure 7: Flow Switches and Solenoid Valves

RotoClone Inlet

Piping Assembly (shipped loose)

9.2A Flow Switches

Flow switches are shipped assembled on the external piping

assembly, which is shipped loose. They are referred to as FS-1 and

FS-2. Flow switch FS-1 is connected to the standard inlet nozzle and

the impeller flushing (auxiliary) nozzle. Flow switch FS-2 is connected

to the emergency spray nozzle(s). Flow switches are set at the factory

and should not be field adjusted. Each flow switch is set for a specific

flow and are not interchangeable. The flow switches need only be

wired up according to the separate wiring diagram included with the

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Aaf-international Type W RotoClone User Manual Page 15

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