5
Electrical Connections
ELECTRIC SHOCK
• Turn off the electrical supply to the disposer before
attempting any work on it. Use a voltmeter or
circuit tester to ensure that power is off.
• All installation work must conform to local
plumbing and electrical codes.
• All control centers and disposers must be carefully
and permanently grounded.
• A properly fused disconnect must be installed at
the electrical supply source for the control center.
PROPERTY DAMAGE
• Ensure that control center voltage and phase
match the disposer motor and electrical supply.
Check name plates on disposer and control
centers for voltage and phase specifications.
• Refer to the control center wiring diagrams in this
manual for correct connection.
• Use NEMA 4 watertight electrical connectors
(not supplied) when making electrical connections
to the control center.
ELECTRICAL CONNECTIONS
Connect the incoming line power and disposer motor
to the labeled terminal block in the control center. Use
appropriate voltage and phase electrical connection
diagrams at the back of this manual. Wire the disposer
motor for the correct voltage using the connection
diagram inside the motor terminal box.
Make sure the solenoid valve is the same voltage as the
control panel and supply power.
Connect water solenoid valve as shown in the wiring
diagrams on pages 7, 8, 9, and 10.
Wire per local electrical code using 7/8" diameter holes
in bottom of control center cabinet and install NEMA 4
watertight electrical connectors (not supplied).
After completing the connections, secure cover.
Replace disposer motor cover.
TIME DELAY RELAY
(Optional, not supplied with MS)
The time delay relay may be used with the MS to
delay solenoid valve shut-off, providing a post flush.
This helps prevents drain line stoppages and is
beneficial when ground food waste must travel through
many bends or a long horizontal run. It is adjustable
from 0 to 10 minutes and factory set to provide
approximately a 5 minute delay. To adjust,
SHUT OFF
ELECTRIC POWER
. Inside unit, locate the adjustment
potentiometer. Turn clockwise to increase delay. Turn
counterclockwise to decrease delay. See Figures 4 and
5 for wiring.
Ensure the voltage rating on the time delay relay and
solenoid valve are the same as the disposer motor
and line voltage.
1
3
6
4
Time Adjustment Knob
Figure 3. 120V or 208/230V Time Delay Relay
Figure 4. Time Delay Relay Connections - 120V or 208/230 V
Figure 5. Time Delay Relay Connection - 460V, 3-phase only
