FOOD WASTE DISPOSERS
MODELS
FD4-50
FD4-75
FD4-125
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
FORM 38475 (May 2015)
© HOBART CORPORATION, 2014
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TABLE OF CONTENTS
SAFETY ............................................................................................................................................4
GENERAL .........................................................................................................................................5
INSTALLATION .................................................................................................................................6
Fabricating ..................................................................................................................................6
Plumbing Connections ................................................................................................................ 6
Electrical Connections ................................................................................................................7
Grounding ...................................................................................................................................7
OPERATION ......................................................................................................................................9
Cleaning ...................................................................................................................................... 9
MAINTENANCE ..............................................................................................................................10
Lubrication ................................................................................................................................10
Cutter Blocks ............................................................................................................................10
Overload Protection ..................................................................................................................10
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Installation, Operation and Care of
MODELS FD4-50, FD4-75, & FD4-125
FOOD WASTE DISPOSERS
SAVE THESE INSTRUCTIONS
SAFETY
RECOGNIZE SAFETY INFORMATION
When you see this symbol on your machine or in this manual, be alert to the potential
for personal injury.
READ ALL INSTRUCTIONS
Read this owner's manual before using the machine. Failure to follow the instructions provided could result
in personal injury or equipment damage.
KEEP OUT OF REACH OF CHILDREN
This disposer is intended for commercial use only.
THIS APPLIANCE IS NOT INTENDED FOR USE BY PERSONS (INCLUDING CHILDREN) WITH
REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES, OR LACK OF EXPERIENCE AND
KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION CONCERNING
USE OF THE APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY.
DO NOT PUT HANDS OR ANY IMPLEMENT IN THE DISPOSER WHILE IN OPERATION.
NEVER FEED WASTE BY HAND PAST VINYL SILVER TRAP SCRAPPING RING.
DO NOT OPERATE IF DAMAGED.
Do not install or operate this disposer if the disposer has been dropped or damaged in any manner. Contact
the nearest factory-authorized service center for examination, repair, or adjustment. (Refer to the service
list included in the Owner's Information Packet.)
DO NOT LEAVE DISPOSER UNATTENDED.
SET THE POWER SWITCH TO OFF BEFORE CLEARING JAMS OR REMOVING OBJECTS FROM
DISPOSER.
When the disposer is wired to a Group 4 Control or Model Group 5 Center, SHUT OFF the branch circuit
main switch or disconnect.
When the disposer is wired to a Group 6 Control Panel, TURN OFF emergency disconnect.
Use long-handled tongs or pliers to remove objects.
TO REDUCE THE RISK OF INJURY BY MATERIALS THAT MAY BE EXPELLED BY DISPOSER, DO
NOT PUT THE FOLLOWING INTO DISPOSER: drain cleaner; glass, china, or plastic; large, whole
bones; metal (bottle caps, tin cans, aluminum foil, etc); whole cornhusks.
ALWAYS KEEP VINYL SILVER TRAP SCRAPPING RING OR SINK STOPPER IN PLACE, EVEN
WHEN NOT IN USE.
This reduces the risk of objects falling into the disposer.
WHEN CLEANING KITCHEN AND DISPOSER AREA, ONLY DAMP WIPE OUTSIDE OF DISPOSER
AND CONTROLS. DO NOT AT ANY TIME HOSE DOWN THE EXTERIOR SURFACES OF THE
DISPOSER AND CONTROLS.
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GENERAL
The FD4 Series disposers utilize hardened stainless steel cutter blocks (1, Fig. 1) mounted to a rotating
ywheel (4, Fig. 1) and a stationary shredder ring (2 Fig. 1) to grind food waste to a small particle size
for discharge through waste lines. With the motor running and ushing water turned on, food waste is
reduced to grinding size by the rotating "hi-bulk" cutter (3, Fig. 1). Grinding occurs as the food waste is
forced against the shredder ring by the cutter blocks and the centrifugal force due to rotation. The ushing
water aids the grinding action and discharges ground food waste into the waste line.
The disposer features removable hardened steel components and reversible rotation with grinding in both
directions and a manual reset inherent overload protector in the motor circuit. The disposer is self feeding,
making it unnecessary to force the food waste into the grinding mechanism. It may be completely lled
with waste when idle, and will start and operate at full load.
Control groups and accessory groups are available to suit each installation.
Fig. 1
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INSTALLATION
T
Immediately after unpacking the disposer, check for possible shipping damage. If the disposer is found
to be damaged, save the packaging material and contact the carrier within 15 days of delivery.
Prior to installation, test the electrical service to make sure that it agrees with the specications on
the disposer data plate.
Temporary support, such as blocking, must be provided for the disposer during installation to avoid
excessive stress at welded or soldered cone to table connection.
ASSEMBLY
To attach the disposer assembly to the cone for a regular
duty installation, see Fig. 2. Note the top clamp ring (1,
Fig. 2) has drilled holes and the bottom clamp ring (3,
Fig. 2) has threaded holes. Using ve screws (2, Fig. 2)
assemble rear halves of clamp rings to the back of the
disposer ange (4, Fig. 2). Lift the disposer into position
on the cone ange (5, Fig. 2) and assemble front halves
of clamp rings using remaining ve screws. Tighten all
screws nger tight. Rotate disposer to desired position
and tighten all screws evenly to form a water-tight joint.
To install accessory group E (sink adapter for 3-1/2" to
4" sink opening), use the short upper housing. See (2,
Fig. 4) and the accessory group parts catalog.
15" OR 18"
6 1/2"
8 3/8"
21-3/4" FD4/50,75 3 PH.
22-3/4" FD4/50,75 1 PH.
FD4/125 3 PH.
23-5/8" FD4/125 1 PH.
Fig. 2
LONG UPPER HOUSING
10 1/4"
WASTE OUTLET
WASTE EXI
7"
4 1/2" 6 1/2"
Fig. 3
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PLUMBING CONNECTIONS
T
Plumbing connections must comply with applicable sanitary, safety, and plumbing
codes.
Drain
The disposer is furnished with a 1-1/2" O.D. waste discharge
spout suitable for connection to a standard trap. Install
waste lines with the shortest possible run and best fall. The
waste exit must not be higher than the center line of the
waste outlet (1, Fig. 3 and 1, Fig. 4). Old waste lines must
be thoroughly cleaned. Ream burrs from cut pipe ends and
use ttings which will permit unrestricted ow. Drum traps
and grease traps must NOT be used.
Water Connections
7"
2
SHORT UPPER
HOUSING
9 1/8"
WASTE OUTLET
1
Connect disposer swirl (1, Fig. 5) from a 3/4" IPS cold water
supply line. Install the ve gallon per minute ow control
WASTE EXI
supplied with the disposer (2, Fig. 5). If the water line pressure
exceeds 60 psig, a pressure reducing valve (6, Fig. 5) (not
Fig. 4
supplied) should be installed. The minimum ow pressure for the disposer to function properly is 16
psig. Install a shut-off valve (not supplied) for proper servicing of the disposer.
All controls are supplied with a solenoid valve (4, Fig. 5) which must be installed in the water supply
line as shown. Control Group 3 is furnished with a pressure switch which must be installed between
the solenoid valve and pressure reducing valve.
Install a vacuum breaker (3, Fig. 5) according to the local plumbing codes. If local plumbing codes
prohibit the use of a vacuum breaker, install an air gap water inlet (not supplied) observing the local
codes.
ELECTRICAL CONNECTION
Electrical and grounding connections must comply with the applicable portions of
the National Electrical Code and/or other local electrical codes.
Disconnect the electrical power to the machine and follow lockout/tagout procedures.
This unit must be connected to a dedicated, acceptable motor control switch with a marked OFF
position to disconnect the appliance from all ungrounded supply conductors. The switch must be
mounted within sight of the disposer or sink opening for the disposer.
Knockouts are provided in the motor junction box for making electrical connections to the unit. Flexible
conduit should be used to permit moving the unit for periodic servicing and maintenance.
Select and follow wiring diagram, furnished with machine, applicable to your disposer and electrical
service.
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Fig. 5
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OPERATION
Before operating disposer make sure it is clear of foreign objects such as metal or wire clippings, screws,
nails, etc., which may have dropped into it during installation. Check the ywheel for free rotation.
Never use your hand to check rotation of ywheel or to remove foreign matter
from the disposer. Use a stick or similar object to turn the ywheel. Foreign matter can be removed
with tongs or pliers.
Start the disposer before feeding food waste. Be sure water is owing. With typical optional controls,
water ow and unit starting are simultaneous and automatic. Feed food waste into disposer. DO NOT
feed china, metal, rags, clam shells, or similar material into the unit. DO NOT put grease or oil in the
disposer. Oil or grease can clog the drain. Always allow the disposer to run for a short period after
grinding is complete to assure proper ushing of the disposer and waste line. This ushing is automatically
controlled with certain optional controls.
CONTROLS
Never reach inside this disposer while it is operating.
The operation of the disposer and additional available controls will depend on the selection of control
devices. Refer to control group data sheet..
CLEANING
The food waste disposer should be kept in a clean and sanitary condition. Allow the disposer to run a
few minutes after disposing of all food waste to completely ush out the interior. If food waste is allowed
to accumulate due to improper clean-up, it will give off offensive odors. If this happens, cleaning can
be accomplished by using a stiff brush with a strong soap and hot water solution. Light cleaning can be
accomplished by grinding ice and a lemon through the disposer.
Do not use chemical solvents or other drain cleaning compounds through the disposer.
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MAINTENANCE
LUBRICATION
No lubrication is required for the food waste disposer. The disposer has grease packed sealed bearings
requiring no service.
CUTTER BLOCKS
The cutter blocks (1, Fig. 1) may be rotated by a qualied Hobart Service Technician if the cutting edges
become worn.
OVERLOAD PROTECTION
The disposer motor is protected by a thermal, resetable overload protector and will trip if the motor is
overloaded. To reset, allow approximately ve minutes for cooling, then press the manual reset button
located on the motor shell opposite the motor junction box. An arrow on the motor shell indicates location
of the button. Restart the disposer using normal operating procedure. If overload protector continues to
trip, contact your local Hobart Service Ofce.
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NOTES
FORM 38475 (May 2015) PRINTED in U.S.A.
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