Insinkerator CC-101A Service Manual
DISPOSER CONTROL CENTERS
SERVICE MANUAL
CC-101 SERIES
COMMERCIAL DISPOSER
CONTROL CENTERS
(INCLUDES WIRING DIAGRAMS)
SEE PREFACE FOR MODEL REFERENCE
IN-SINK-ERATOR DIVISION
EMERSON ELECTRIC CO.
4700 21st STREET, RACINE, WI 53406
TABLE OF CONTENTS
2 Preface
2-1
CC-101 B
15-2
SECTION PAGE NO.
1 Safety Precautions 1-1
3 General Information 3-1
4 Wiring Diagrams 4-1
5 Plumbing, Motor and Line Voltage Connections 5-1
6 Subpanel Removal and Replacement 6-1
7 Component Description 7-1
8 Component Location 8-1
9 Operating Sequence 9-1
10 Component Testing and Replacement 10-1
11 Troubleshooting 11-1
12 Information Tips 12-1
13 Special Equipment 13-1
14 Glossary of Terms 14-1
15 Technical Data Sheets (How the Control Center Works)
CC-101 C & CC-101D 15-10
CC-101 E 15-18
CC-101 G & CC-101H 15-26
PREFACE SECTION 2
A Control center is a device used to start and stop a commercial
disposer by the use of two push-button switches. It is commonly
referred to as a control panel and contains various electrical
component parts. The main functions of the control panel are to
reverse the direction of the disposer motor each time it is started,
start the water flow to the disposer, and allow it to flow for several
minutes after the disposer is turned off.
This manual includes CC-101 series control centers manufactured
since 1976 (i.e., CC-101 A through CC-101 G). Basic functions
remained the same throughout the CC-101 series, but component
parts changed, and eventually additional features were added.
NOTE
Once the function and purpose of each component is learned, control
centers manufactured before 1976 can also be diagnosed. If one
studies the B and C models, the remaining models become easier to
understand.
The model number of a control center can be found on the
specifications decal located on the inside or outside of the enclosure
door. All information on the decal (i.e., voltage, horsepower and
phase) must be noted prior to diagnosing. Variations of a control
center do not necessarily change the model number. Visual
inspection will determine which wiring diagram in this manual applies
to a given control center.
Factory assistance is available by calling 1-800-558-5700 (in
Wisconsin call 1-800-922-2331).
2-1
GENERAL INFORMATION SECTION 3
GENERAL
This section is not intended as a complete installation guide.
Basic notes and guidelines for installation are provided here
for the purpose of checking or troubleshooting an existing
installation. Detailed installation instructions were provided
with the disposer; to obtain technical information not covered
in those instructions, contact the Factory.
NOTE
Neither the IN-SINK-ERATOR Company nor any of its Authorized
Service Centers performs original installations,
All installations are to be in accordance with local plumbing
and electrical codes.
NOTE
The disposer control center must be mounted within direct sight of
the disposer per local codes. Any remote control stations must also
be located within direct sight of the disposer per local codes.
PLUMBING INSTALLATION
The following plumbing installation diagrams are included to
illustrate the plumbing connections of a typical installation.
Figure 5-1 shows an installation for a control center with an
enclosure-mounted solenoid valve (models CC-101A and
CC-101B). Figure 5-2 shows an installation with a remote-
mount solenoid valve (all other models).
The solenoid valve and flow control valve are each marked
with arrows showing the proper water flow direction. Both
valves must be installed so that the water flows through them
in the correct direction or the valves will not work properly.
Note that in all installations a syphon breaker (vacuum
breaker) must be installed above the sink flood plane per local
plumbing code.
Figure 5-1. Plumbing Connection Diagram, Typical
Installation (Enclosure-Mount Solenoid
Valve).
GENERAL ELECTRICAL INFORMATION
IN-SINK-ERATOR Commercial Disposer Control Centers are
shipped from the factory wired for a specific voltage and
phase. Please refer to the Control Center wiring diagrams in
this manual for the correct connections. (Disposer motor
connections will depend upon the operating voltage and
phase of the disposer.)
Figure 5-2. Plumbing Connection Diagram, Typical
Installation (Remote-Mount Solenoid
Valve).
3-1
Figure
4-1.
CC-101B
Figure
4-2.
CC-101E
SECTION 3 GENERAL INFORMATION (Cont'd)
FEATURES
All CC-101 series Commercial Disposer Control Centers have
the following features:
Automatic Reversing Action — Automatically reverses the
disposer motor each time it is started to double the life of the
disposer grinding shredders.
Built-in Magnetic Starter — Automatically disengages electric
power to disposer if power loss occurs. Disposer must be
restarted.
Post Water Flush — Adjustable time delay relay automatically
permits water to flush sewer lines clear after disposer has
been turned off, eliminating sewer clogging.
DIMENSIONS
Models CC-101 A and CC-101B
Length (A) 14"
Width (B) 12"
Depth (C) 6"
Width (D) 3-1/2"
5/16" Bolt Holes, Center to Center (E) 10"
5/16" Bolt Holes, Center to Center (F) 14-11/16"
Models CC-101C. CC-101D, and CC-101E
Length (A) 14"
Width (B) 12"
Depth (C) 6"
5/16" Bolt Holes, Center to Center (E) 10"
5/16" Bolt Holes, Center to Center (F) 14-11/16"
Other Features:
—Main flow control valve and solenoid valve mounted elsewhere in water line
Model CC-101G
Length (A) 15"
Width (B) 10"
Depth (C) 6"
5/16" Bolt Holes, Center to Center (E) 8"
5/16" Bolt Holes, Center to Center (F) 15-5/8"
Figure 4-3. CC-101G
3-2
WIRING DIAGRAMS SECTION 4
The standard disposer motor voltages are 115/208/230 volts for
single phase electrical power and 208/230/460 volts for three phase
electrical power.
NOTE
Three phase contactors require three sets of contacts to carry line
voltage to the disposer, while single phase contactors require four
Circuitry and parts function on all control centers are identified
within their respective models. This applies to all component parts
controlled by or on the secondary voltage side of the transformer,
whether it is a 1 phase or 3 phase control center.
The wiring (circuitry) to the line voltage connections on the Reversing
contactors are identical on all 3 phase (only) contactors. The wiring
(circuitry) to the line voltage connections on the Reversing contactors
are identical on all 1 phase (only) contactors.
sets. Two identical contactors are utilized in every control center to
perform the function of reversing the disposer motor rotation.
Therefore, the wiring diagrams in this section (Figs. 4-12 through 4-
19) show 3 phase contactors but can be used to diagnose or trace
circuitry for 1 phase or 3 phase control centers, keeping in mind that
only the contactors are different from 1 phase to 3 phase. Refer to
Figs. 4-10 and 4-11 for 1 phase contactor connections.
All electrical connections must conform to local codes. Be
certain that all IN-SINK-ERATOR disposers and control centers
are carefully and permanently grounded.
CAUTION
ELECTRICAL INSTALLATION
BEFORE ANY ELECTRICAL WORK IS PERFORMED, REMOVE LINE
POWER FROM THE DISPOSER CONTROL CENTER BY TURNING OFF
THE CIRCUIT BREAKER. USE A VOLTMETER OR CIRCUIT TESTER TO
ENSURE THAT POWER IS OFF BEFORE PROCEEDING.
disposer motor voltage and phase must be the same as the
electrical supply. Check name-plates on both units for ratings.
All connections must conform to local codes. Ground the
disposer control center, the disposer, and all control boxes.
The following wiring diagrams are included to illustrate the electrical
connections for each standard model of disposer control center and
disposer motor. For each standard model of disposer control center,
wiring diagrams are shown to illustrate the most typical configurations. The wiring diagrams include motor connections. Since various
options can be custom ordered for a control enter, the wiring
diagrams for a particular model of control center do not reflect every
possible option. Additional wiring diagrams illustrating various special
(nonstandard) configurations of each model are provided in section
10 of this manual.
WARNING
CAUTION The control center and
4-1
TRANSFORMER CONNECTIONS FOR
SECTION 4 WIRING DIAGRAMS (Cont'd)
Figure 4-3. 115 V Transformer Taps.
CONTROL CENTERS WITH 115 V CONTROL
CIRCUIT
Power lines carry line voltage to the primary terminals (also
called "taps") of the transformer. Line L2 is connected to the
common (ground) tap with Line L1 connected to the tap
coinciding with the line voltage.
The secondary taps on these transformers will always
supply 115 V ac to the load. This secondary voltage
operates the component parts in the control circuit. These
transformers are rated at 100 VA (Volt/Amperes), and can
be used for any 208 V/230 V/460 V incoming line. See
Figure 4-3.
TRANSFORMER CONNECTIONS FOR
CONTROL CENTERS WITH 24 V CONTROL
CIRCUITS
All control centers with 24 V secondary voltage require one
of two transformers. They appear identical. The specification
decal on the transformers will show 120 - 240 V or 240 -480
V (connections for line voltage). There is no reference to 208
V, but it is to be understood that 208 V connections will be
the same as 240 V. Whenever the recommended
transformer is used wiring diagrams furnished with the Control Center or in this manual apply.
Both 24 V secondary tap transformers can be used with 240
or 208 V inputs, but the terminal connections will change
and Control Center wiring diagrams may not necessarily apply. Whenever in doubt, refer to and use the connections
shown on the transformer specification decal. Connections
for input (primary) and output (secondary) voltages are the
same in all cases. See Figure 4-4 for connections.
RATED AT 100 VA
Figure 4-4. 24 V Transformer Taps.
4-2
WIRING DIAGRAMS (Cont'd) SECTION 4
Terminal Connections
Transformer tap connections vary and are made in accordance with the applied line voltage. A conductive connection strap is normally used but 12 ga. wire can be
substituted (see Fig. 4-5).
Connections
Shown are the standard connections when the recommended
transformer is used. Refer to the illustrated parts list for specific
Control Centers. The voltage and phase of the Control Center
must be known. Secondary voltage for Figs. 4-5 through 4-8 is
24 V.
Figure 4-5. 115 V, 1 Phase.
4-3
*SEE WIRING DIAGRAM IN DISPOSER
Figure
4-12.
Model CC
-
101A Wiring Diagram.
WIRING DIAGRAMS (Cont'd) SECTION 4
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-2.
4-7
*SEE WIRING DIAGRAM IN DISPOSER
SECTION 4 WIRING DIAGRAMS (Cont'd)
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-2.
4-8
Figure 4-13. Model CC-101A Wiring Diagram (with Contactor Interlocks).
*SEE WIRING DIAGRAM IN
Figure
4-14.
Model CC
-
101B Wiring Diagram.
WIRING DIAGRAMS (Cont'd) SECTION 4
DISPOSER TERMINAL BOX FOR
PROPER CONNECTIONS OR FIG.
5-2.
4-9
SECTION 4 WIRING DIAGRAMS (Cont'd)
4-10
*SEE WIRING DIAGRAM IN DISPOSER
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-2.
Figure 4-15. Model CC-101B Wiring Diagram (with Auto-Shutoff Timer).
WIRING DIAGRAMS (Cont'd) SECTION 4
*SEE WIRING DIAGRAM IN DISPOSER
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-5.
Figure 4-16. Modal CC-101C and CC-101D Wiring Diagram.
4-11
*SEE WIRING DIAGRAM IN
Figure
4-17.
Model CC
-
101E Wiring Diagram.
4-
12
SECTION 4 WIRING DIAGRAMS (Cont'd)
DISPOSER TERMINAL BOX FOR
PROPER CONNECTIONS OR FIG.
5-7.
WIRING DIAGRAMS (Cont'd) SECTION 4
•SEE WIRING DIAGRAM IN DISPOSER
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-7.
Figure 4-18. Model CC-101E Wiring Diagram (with Auto-Shutoff Timer).
4-13
SECTION 4 WIRING DIAGRAMS (Cont'd)
•SEE WIRING DIAGRAM IN DISPOSER
TERMINAL BOX FOR PROPER
CONNECTIONS OR FIG. 5-9.
Figure 4-19. Model CC-101G Wiring Diagram.
4-14
PLUMBING, MOTOR AND LINE VOLTAGE
208/230
VOLT
-3 0 460
VOLT
-3 0
Figure
5-2.
Electrical Connections
Figure
5-3.
Rotary Disconnect
CONNECTIONS
SECTION 5
Figure 5-1. CC-101A & B General Layout.
For CC-101A & CC-101B.
MOTOR CONNECTIONS FOR
For CC-101A & CC-101B.
7 & 1 ———— M1 1 —————— M1
8 & 2 ———— M2 2 —————— M2
3 & 9 ———— M3 3 —————— M3
10 & 4 ———— TT 4 & 7 ———— TT
5 & 1 ———— TT 5 & 8 ———— TT
12 & 6 ———— TT 3 & 9 ———— TT
TS = TAPE SEPARATELY 11 - TS
TT = TIE TOGETHER
NOTE: OLD 208 VOLT 3 0 MOTORS HAD ONLY 3 LEAD WIRES
ATTACHED TO TERMINAL BLOCK M1, M2 & M3.
10 - TS
12 - TS
These control centers have rotary line disconnect switches directly
connected to the incoming line.
The terminal blocks accommodate the motor connections.
5-1
PLUMBING, MOTOR AND LINE VOLTAGE
7 & 1
————
M1
1
——————
M1
SECTION 5
CONNECTIONS (Cont'd)
Figure 5-4. CC-101C & D General Layout.
ELECTRICAL CONNECTIONS TO TERMINAL
BLOCK IN CONTROL CENTER
MOTOR CONNECTIONS FOR
20B/230 VOLT-3 0 460 VOLT-3 0
8 & 2 ———— M2
3 & 9 ———— M3
10 & 4 ———— TT
5 & 1 ———— TT
12 & 6 ———— TT
TS = TAPE SEPARATELY
TT = TIE TOGETHER
Figure 5-5. Electrical Connections For CC-101C & CC-101D.
5-2
2 —————— M2
3 —————— M3
4 & 7 ———— TT
5 & 8 ———— TT
3 & 9 ———— TT
10 - TS
11 - TS
12 - TS
PLUMBING, MOTOR AND LINE VOLTAGE
3 & 9
————
M3 3 ——————
M3
10 & 4
————
TT
4 & 7
————
TT
5 & 1
————
TT
5 & 8
————
TT
12 & 6
————
TT
3 & 9
————
TT
10 - TS
TS = TAPE SEPARATELY
11 - TS
CONNECTIONS (Cont'd)
Figure 5-6. CC-101E General Layout.
SECTION 5
SINGLE PHASE THREE PHASE
MOTOR CONNECTIONS FOR
208/230 VOLT-3 0 460 VOLT-3 0
7 & 1 ——— M1
8 & 2 ———— M2
ELECTRICAL CONNECTIONS TO TERMINAL
BLOCK IN CONTROL CENTER
1 —————— M1
2 —————— M2
TT = TIE TOGETHER
12 - TS
Figure 5-7. Electrical Connections For CC-101E.
5-3
PLUMBING, MOTOR AND LINE VOLTAGE
SECTION 5
CONNECTIONS (Cont'd)
Figure 5-8. CC-101G General Layout.
MOTOR CONNECTIONS FOR
208/230 VOLT-3 0 460 VOLT-3 0
7 & 1 ———— M1
8 & 2 ———— M2
3 & 9 ———— M3
10 & 4 ———— TT
5 & 1 ——— TT
12 & 6 ———— TT
TS = TAPE SEPARATELY
TT = TIE TOGETHER
5-4
Figure 5-9. Electrical Connections For CC-101G.
1 —————— M1
2 —————— M2
3 —————— M3
4 &7 ———— TT
5 & 8 ———— TT
3 & 9 ———— TT
10 - TS
11 - TS
12 - TS
SUBPANEL REMOVAL AND REPLACEMENT SECTION 6
GENERAL
This section provides the information required for the removal and replacement of the subpanel in the disposer
control center enclosure. The subpanel is the flat piece
of sheet metal inside the enclosure that most of the
components are mounted on. Most components are
secured with screws and can be changed without
removing the subpanel. However, a few components
are secured with screws to a nut on the back of the
subpanel and require that the panel be removed to
remove the component. Also, it is sometimes necessary
to remove the subpanel to retrieve lost fasteners.
Differences between control center models sometimes
require slight differences in the procedures. The
changes are described when necessary.
REMOVAL PROCEDURE
WARNING
BEFORE PERFORMING ANY REPAIRS ON THE
DISPOSER OR THE DISPOSER CONTROL CENTER, BE
SURE TO TURN OFF THE MAIN POWER AT THE
DISCONNECT, CIRCUIT BREAKER OR FUSE BOX. LABEL
AND LOCK THE CIRCUIT OPEN. USE A METER OR
ELECTRICAL TESTER TO ENSURE THAT POWER IS OFF
BEFORE PERFORMING ANY REPAIRS.
1. Turn off power line to disposer control center. Label
and lock the circuit open.
2. For units equipped with door interlock switch, turn
door interlock switch to OFF position.
3. Loosen screws securing enclosure door clamps and
open door.
NOTE
Before disconnecting any wire, write down its location. You
will need to refer to It when reassembling the disposer control
center.
NOTE
Some units have plastic safety shields covering the terminals
of some components. On units so equipped, remove the shield
(s) before disconnecting wires from those components.
4. Disconnect power line wires from contactor or
disconnect relay.
5. Disconnect and separately insulate disposer motor
wires from terminal block.
6. Disconnect wires from start switch terminals.
7. Disconnect wires from stop switch terminals.
8. On units so equipped, cut cable tie securing stop
switch/start switch wire harness to enclosure.
9. Disconnect solenoid valve wires from terminal block.
10. On units equipped with pressure switch, disconnect
pressure switch wires.
11. On units equipped with disconnect switch (es),
disconnect wires from disconnect switch terminals.
6-1
SECTION 6
SUBPANEL REMOVAL AND
REPLACEMENT (Cont'd)
12. Remove screws securing panel to enclosure.
13. Carefully remove panel from enclosure. It may be
necessary to tilt the panel somewhat to remove it
from the enclosure.
NOTE
Some units have a plastic safety shield over the terminals of
the door interlock switch or disconnect contactor. On units so
equipped, the safety shield must be removed before the
power line wires can be disconnected.
REASSEMBLY PROCEDURE
WARNING
BEFORE PERFORMING ANY REPAIRS ON THE
DISPOSER OR THE DISPOSER CONTROL CENTER. BE
SURE TO TURN OFF THE MAIN POWER AT THE
DISCONNECT, CIRCUIT BREAKER OR FUSE BOX.
LABEL AND LOCK THE CIRCUIT OPEN. USE A METER
OR ELECTRICAL TESTER TO ENSURE THAT POWER IS
OFF BEFORE PERFORMING ANY REPAIRS.
1. Make sure power line to disposer control center is
still turned off.
2. Insert panel in enclosure and position panel so that
mounting holes in panel are aligned with standoffs
(mounting posts) in enclosure.
3. Secure panel to enclosure with 4 screws.
4. Connect solenoid valve wires.
5. On units equipped with a pressure switch, connect
pressure switch wires.
6. On units equipped with disconnect switch (es),
connect wires to disconnect switch terminals.
7. If cable tie was cut during disassembly procedure,
replace cable tie.
8. Connect wires to start switch terminals.
9. Connect wires to stop switch terminals.
10. Connect disposer motor wires.
11. Connect power line wires.
12. On units equipped with plastic safety shields,
replace the safety shield over the terminals.
13. Close and secure enclosure door.
6-2
COMPONENT DESCRIPTION SECTION 7
GENERAL
This section provides information on the function of the
component parts of the control center. Photographs of the
individual components are provided, with a description accompanying each one. For some components, more than one
photograph is provided in order to illustrate minor component
changes from one model to the next. This section also calls out
the location of each component on the schematic diagram.
Note that no one model of disposer control center contains all
the components listed in this section. The components used in
a particular control center can be determined by looking at the
wiring diagram on the inside of the control center enclosure
door.
Transformer
The transformer steps down the higher voltage from the power
line to a relatively low 115 volts (24 volts for some models).
This lower voltage is used for control purposes to power the
controlling components, which may include a reverser/timer, a
latch relay coil, a contactor coil, a solenoid valve, a solenoid
valve timer, a restart delay timer, a timer relay coil, a control
circuit board, and an auto shutoff timer.
Line voltage is applied to the primary winding (the top winding
of the transformer as shown on the wiring diagram), and the
control voltage (115 or 24 volts) is taken from the secondary
winding (the bottom winding). The transformer has several
different input connections so that it can be used with different
line voltages.
Figure 7-1. Transformer.
7-1
Figure
7-2
. Fuse.
SECTION 7 COMPONENT DESCRIPTION (Cont'd)
Fuse
The fuse, designated F1 on the wiring diagrams in this
manual, provides circuit protection in the event of a
short circuit or other electrical problem in the control
center. If too much current is used by the any
component in the control center, the fuse will blow,
opening the circuit. This fuse does not protect the
disposer motor from excessive current; the disposer
motor is protected by the circuit breaker or fuse in the
line that supplies power to it or by the overload
protector or the disposer motor.
On the wiring diagrams Inside the enclosure door,
some models designate the fuse by Its F1 reference
designation;
other models designate It only by its fuse type, e.g.
FNA 1 or FHA 2.
Door Interlock Switch (Line Disconnect)
NOTE
The door interlock switch is a safety device that
combines a disconnect switch with a mechanical door
latch. They are connected together by an "operating
rod" that is fastened to the interlock switch. The door
interlock switch must be turned off to open the control
center door. Turning the switch off disconnects the
power line from the disposer motor and from the
transformer that supplies power to the control circuits
in the control center. This is done as a safety
precaution. However, line voltage is still present on the
line terminals of the door interlock switch.
Figure 7-3. Door Interlock Switch.
7-2
Disconnect Switch
COMPONENT DESCRIPTION (Cont'd) SECTION 7
Control centers that do not have a door interlock switch have
one or two disconnect switches mounted at the top of the
control center enclosure. The switch (es) are positioned so that
when the control center door is closed, the switch plunger(s)
are pushed in, closing the switch contacts. Disconnect switch
contacts are wired in series. When the control center door is
opened, the switch contacts open and the control voltage is
turned off, either directly by the disconnect switch or indirectly
by a disconnect relay on units so equipped. This turns off line
voltage to the disposer control center (for units with two
disconnect switches, only one disconnect switch has to be
open to disconnect the control voltage). However, line voltage
is still present at the power line terminals of some components
(refer to the appropriate wiring diagram to determine which
terminals remain live for any particular model).
Disconnect Relay (Line Disconnect)
Some models of disposer control center have a disconnect
relay that works in conjunction with disconnect switches. The
disconnect relay supplies line power to the disposer control
center. The disconnect relay coil is powered directly from the
power lines (line voltage). Power to the disconnect relay coil is
controlled by the disconnect switches. If either switch opens
(the control center door is opened), the disconnect relay coil is
turned off. This opens the relay, disconnecting line power to the
disposer control center. However, line voltage is still present on
the power line terminals of the disconnect relay even when the
contactor is open.
Figure 7-4. Disconnect Switch.
Figure 7-5. Disconnect Relay.
7-3
Figure
7-6.
START Switch.
SECTION 7 COMPONENT DESCRIPTION (Cont'd)
START Switch
The START switch has one or more sets of contacts, depending upon
the model. When the START switch is pressed, all the contacts close.
Depending upon the model, the contacts send power to different
devices such as the contactor coil, the solenoid valve, the control
circuit board, and the auto shutoff timer. All functions required to start
the disposer are switched by the START switch contacts.
For all models, the START and STOP switches are each composed of a mechanical pushbutton connected to one or two
detachable sets of electrical contacts that open and close as
the pushbutton moves In and out. However, for the operational
description, the STOP and START switches are treated as
single components rather than as assemblies.
STOP Switch
The STOP switch has one or more sets of contacts, depending
upon the model. When the STOP switch is pressed the
contacts open or close, depending upon whether they are
normally open. or normally closed. One set of contacts opens
to interrupt power to the contactor coil (either directly or via the
control circuit board). Other contacts close to activate the
alternator/timer, latch relay, or the restart delay timer.
NOTE
NOTE
The start and stop switches are momentary contact pushbutton switches. Once pressed in, they will return to their original
position when released.
Figure 7-7. STOP Switch.
7-4
Remote Control Station
Figure
7-8.
Remote Control Station.
COMPONENT DESCRIPTION (Cont'd) SECTION 7
This is a START switch and a STOP switch that can be mounted at a
distance from the control center, and are the same type and design of
those on the control center. The remote START switch contacts are
connected in parallel with the control center START switch contacts.
The remote STOP switch contacts are connected in series or parallel
with the control center STOP switch contacts, depending upon the
model. (Refer to the appropriate wiring diagram.)
Pressure Switch
The pressure switch prevents the disposer motor from operating if the
water pressure falls below approximately 15 p.s.i. If pressure drops
below this point, the pressure switch opens, interrupting power to the
component parts and shuts down the disposer. The START switch
must be pressed to restart the disposer. The pressure switch acts in
the same manner as a STOP switch.
Figure 7-9. Pressure Switch.
7-5
Reverser/Timer
SECTION 7 COMPONENT DESCRIPTION (Cont'd)
The reverser/timer performs two different functions for the
disposer control center. It switches between the F and the R
contactor coils with every START/STOP cycle. This provides
the automatic reversing action for the disposer motor. It also
controls the water flow timing cycle. When the STOP switch is
pressed the reverser/timer begins the 5-minute water flow
timing cycle; it maintains power to the solenoid valve until the
cycle ends. Terminal 2 is the power input, terminal 7 is ground
(common), terminal 4 is the output that drives the solenoid
valve, and terminal 3 senses when each START/ STOP cycle
begins and ends. Terminals 6 and 8 connect to the F (forward)
and R (reverse) contactor coils respectively. Note that when the
START switch is pressed, the reverser/ timer connects the F or
R contactor coil internally to pin 7 to turn the contactor coil on.
Latch Relay (Reversing Relay)
The latch relay performs the automatic reversing of the disposer motor. This relay toggles ("flip-flops") or switches
between its two sets of contacts once per START/STOP cycle.
In one position, the latch relay directs voltage to the F (forward)
contactor coil, causing the disposer motor to run in the forward
direction. In the other position, the latch relay directs voltage to
the R (reverse) contactor coil, causing the motor to run in the
Figure 7-10. Reverser/Timer and Socket.
reverse direction. The latch relay changes position every time
the STOP switch is pressed.
Figure 7-11. Latch Relay.
7-6
COMPONENT DESCRIPTION (Cont'd) SECTION 7
Alternator Switch (Reversing)
The alternator switch provides auto-reversing action for the
disposer motor by alternately selecting between its two outputs every START/STOP cycle. The alternator switch is mechanically linked with the STOP switch so that every time the
STOP switch is pressed, the alternator switch changes from
one output to the other. One output is connected to the F
contactor coil; the other is connected to the R contactor coil.
Contactors (Reversing Contactors)
Two contactors, F (forward) and R (reverse), direct line
voltage to the disposer motor. They are either mounted separately or on a mutual mounting plate. One connects the
disposer motor windings to run the disposer in the forward
direction. The other connects them to run in the reverse direction. Depending upon the model of disposer control center,
selection of the contactors is controlled by the reverser/ timer,
reversing switch, latch relay, or control circuit board. This
description does not include the auxiliary contacts or auxiliary
contact microswitches mounted to the reversing contactor.
When power is applied to one of the contactor coils, all of the
contacts associated with that coil close. They open again
when power is removed from the coil. Note that only one
contactor, F or R, can be energized at a time. All the F
contacts shown on the wiring diagram close when the F contactor coil is energized. All the R contacts close when the R
coil is energized. When the contactor pulls down engaging the
contacts carrying power to the motor, it also activates the
auxiliary contacts or auxiliary contact microswitches.
Since the application of the contacts differs from one model of
disposer control center to the next, it is necessary to refer to
the wiring diagram for each model to determine their
functions.
Figure 7-12. Alternator Switch (Is fastened to the
STOP switch).
Figure 7-13. Contactors.
7-7
Figure
7-14.
Auxiliary Contacts.
Auxiliary Contacts
SECTION 7 COMPONENT DESCRIPTION (Cont'd)
Auxiliary contacts are additional sets of contacts (block or
microswitches) mounted to and are activated in unison with the
mechanical action of the reversing contactors.
Auxiliary contact blocks are mounted to the end of the reversing
contactor. See Fig. 7-14 (A).
Auxiliary contact microswitches are mounted to the top of the
reversing contactor. See Fig. 7-14 (B).
Auxiliary contacts may contain one or two sets of contacts which may
have any combination of N.O. and/or N.C.
They are used in the control circuit to:
• Bypass the start button (switch) after the unit is started and the start
button is released, maintaining power to the control circuit.
• Activate power to the "F" or "R" coil in the reversing contactor.
• Engage the time delay relay controlling the solenoid
valve.
• "Lockout" the reversing contactor coil not engaged preventing it
from being activated.
• Maintain power to the time delay relay holding the solenoid valve
engaged after the stop button is pressed and the disposer motor
stops.
The model of the control center determines the type, the number of
and the function of the auxiliary contacts. Review the respective wiring
diagram.
Solenoid Valve
The solenoid valve is an electrically-controlled water valve. The
valve opens when power is applied to the solenoid valve coil,
allowing water to flow to the disposer. When power to the coil is
removed, the valve shuts off the water flow. The solenoid valve
is powered by the transformer in the disposer control center,
and is controlled by the reverser/timer, the time delay relay, or
a printed circuit board.
The solenoid valve must be installed with its arrow pointing
downstream or erratic water flow will occur.
Figure 7-15. Solenoid Valve.
7-8
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