THERMA Internal Strainer Series Installation instructions

Copyright ©2013 Big Dipper® Thermaco, Inc. • P.O.Box 2548 • Asheboro, NC 27204
Toll Free: [phone] • V: [phone] • F: [phone]
E-mail: [email protected] • Online: www.big-dipper.com
Installation & Operation Instructions
For Big Dipper W-750-IS and W-1250-IS
Internal Strainer (IS) Series Units
(Includes 230 VAC Units)
A Big Dipper W-750-IS in a
Basement Location
Part# MNL-ISCU14000
VL

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 2
Table of Contents
Table of Contents
IS System Overview 3
IS System Maintenance 5
IS Timer Operation 6
IS System Troubleshooting 7
How To Reverse IS System Operation 8
Plumbing Installation 9
Electrical Installation 11
IS Module Wiring Diagram 12
Junction Box Wiring Diagram 13
IS Component Identication 14
IS Replacement Parts 17
Limited Warranty 18

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 3
The Thermaco, Inc. Big Dipper®Automatic Grease and Oils Removal System removes free-
oating grease & oils from kitchen drain water ows. As most food service facility managers
already know, grease buildup within a building’s plumbing drainage system is a major cause of
problems due to drain line blockages. These problems jeopardize normal operations as well as
create health and safety hazards within the facility itself.
The proper installation of a Big Dipper System can reduce or eliminate grease problems. Use
of the Big Dipper assures minimization and/or elimination of costly sewer surcharges and nes
through efcient separation and removal of free-oating grease & oils. In addition, the Big Dipper
also helps reduce or eliminate pumping and disposal costs associated with conventional grease
traps or interceptors. The recovered grease & oils are substantially water-free and are suitable
for recycling by local rendering and/or biodiesel companies.
The Big Dipper system is an automatic, self-cleaning device. As greasy kitchen efuent drains
from kitchen xtures, the unit traps the grease & oils. These separate from the efuent and rise
to the surface of the separator tank. The unit automatically skims the trapped grease & oils and
transfers the grease & oils to a collection container. A timer controls the self cleaning operation,
activating the skimming wheel at a user-set time. Only the “cleaned” water exits the unit and
ows into the facility drain lines.
The Big Dipper system’s compact footprint allows installation directly at the source where grease
problems originate. The system design also allows easy maintenance and operation requiring only
a minimal amount of daily and weekly maintenance to maintain peak operating performance.
The Big Dipper system design allows for maximum installation exibility. Reversing the system
operation is a simple as rotating the cover assembly of the unit.
Grease interceptors, grease traps, automatic recovery units, grease removal devices and other
similar plumbing devices receiving kitchen ows from sinks, oor drains, woks and other food
bearing sources may generate odors. There are many factors inuencing odor evolution and
dissemination. These include room ventilation, kitchen menu, ambient temperatures, ware wash-
ing practices, grease/oil input, daily input uid
volume, sanitizers, installation plumbing design
and product maintenance/upkeep. Odors are
usually prevented by good area ventilation,
frequent uid inputs, good product maintenance
practices and proper product installation. Ad-
ditional steps, including aeration, chlorination,
improved area ventilation and additional mainte-
nance control, may be needed at some sites.
Big Dipper® Internal Strainer
(IS) System Overview
Big Dipper® Internal Strainer (IS) System Overview

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 4
Big Dipper® Internal Strainer (IS) Features
Jog Switch
The Stainless IS Series Big Dipper has a built in Jog
Switch on the side of the housing which allows for quick
and easy monitoring of the unit to ensure that it is op-
erating correctly. By simply pressing the button, the
motor should activate and the skimming wheel should
turn normally. Letting go of the button will disengage
the motor. Using this jog switch will not interfere with
the timer setting of the unit.
Feedback Provided by Jog Switch
• If the unit is not operating regularly, but will work when the button is pressed, it is likely that the
timer on the unit is no longer operating and should be replaced.
• If pressing the button does nothing then there may be a problem with the motor assembly.
Please contact Thermaco or your local service agent.
Energy Saver Switch
Each Stainless IS Series Big Dipper ships with the
heating element activated such that the heater oper-
ates only when the motor is running. Alternatively, the
unit can be run in Energy Saver Mode which deacti-
vates the heater in the unit. The switch for changing
this mode is in the rear of the Center Lid Assembly
just above the power cord. To engage Energy Saver
Mode and deactivate the heater, press and release
the button once. The button will stick out further
than it does when the heater is on. For continuous
operation of the heater, please see the underside of
the center module lid or contact Thermaco or contact
your local service agent.
Heater On
Energy Saver Mode Off
Heater Off
Energy Saver Mode On
Energy Saver Switch Settings
Big Dipper® Internal Strainer (IS)
System Overview

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 5
Big Dipper® Internal Strainer (IS)
System Maintenance
Big Dipper® Internal Strainer (IS) System Maintenance
*CAUTION! DISCONNECT POWER TO UNIT BEFORE CLEANING
to prevent damage to the unit and personal injury
*NOTE: Before energizing unit after cleaning, ll tank with water
to protect wipers and heater from damage
Daily Maintenance:
(A) Empty the clear plastic grease/oils collection container (located beside the unit) prior to its
becoming full once each day. The Big Dipper recovers grease and oil virtually water-free so that
they can be recycled. The collector container should be washed periodically so as to maintain
the easy viewing translucent characteristic of the collector.
(B) The internal strainer basket should be removed and emptied into a garbage container by
shaking briskly. Wash the inside and outside surfaces of the strainer after emptying.
Weekly Maintenance:
(A) Check the collection trough and the wiper blades for any solids build-up. Wipe off any accu-
mulated deposits and assure that the wiper blades are clipped in place properly.
(B) Check the Timer to be sure it is set and operating correctly.
(C) Press the Jog Switch button (on the side of the center module) momentarily to ensure that
the motor and skimming wheel are still operating correctly.
(D) Check the thickness of the grease layer at the top of the unit. There should be no appreciable
amount of grease or oil left in the tank immediately after the daily automatic skimming cycle. If
there is more than a 1/2” (13 mm) thick layer of grease after the skimming cycle, this indicates
a need to increase the skimming time. Increase the timer settings accordingly until a clean unit
appearance is obtained after the automatic skimming cycle (A simple guide is to increase the
“on” time by 30 minutes for each 1” (25 mm) of grease layer observed after the skimming cycle).
Quarterly Maintenance:
(A) The internal strainer basket in the unit is designed to remove incidental solids from kitchen
drain ows. Over a period of time, sediment consisting of very ne particles may begin to ac-
cumulate on the bottom of the unit. If this build-up is allowed to continue, it may eventually block
the outlet bafe. To prevent this from occurring, remove the lid and stir the bottom of the unit with
a long handled spatula while water is owing to ush out the sediment. Occasionally drain and
clean the unit thoroughly. Properly used, a wet-vac may be appropriate for this purpose.

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 6
Big Dipper® IS System Suggested Settings/Timer Operation
Big Dipper® IS System
Suggested Settings/Timer Operation
NOTE: IN CASE OF POWER FAILURE, RESET TIMER. (See Step 2 above).
After the plumbing installation is complete, the Big Dipper unit needs to be set for the proper au-
tomatic self-cleaning operation for the facility. The Big Dipper W-750-IS model is equipped with
one (1) 24 Hour/96 Event time controller while the W-1250-IS model is equipped with two (2) time
controllers. The time controller is located under the lid of the motor housing mounted on top of
the Big Dipper lid (See Pages labeled “Electrical Connection Detail” sketches of this location).
Depending upon the amount of accumulated grease and oils, the system may need to be reset
to operate more or less time to skim all separated grease and oils. This can be determined by
removing the top cover and observing the depth of the separated grease layer shortly after a
cleaning cycle is completed. This layer should not be more than 1/2” (12 mm) thick. If this layer
is consistently thicker, increase the operating times of the Big Dipper IS System by 30 minutes for
each additional 1” (25 mm) of grease, not to exceed 2 hours in a complete run cycle. If required,
additional run cycles can be added throughout the day. Consequently, if there is any quantity of
water in the grease collector, then the Big Dipper is operating too long. Decrease the amount of
operating time by one tab (15 min.) at a time until no water is collected in the container.
7
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PM
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TO SET TIMER:
1. Push on/off tabs on the outer ring
of timer inward into dial at desired
“ON” times. 1 Tab = 15 minutes.
Minimum of one (1) tab (15 min-
utes) not to exceed 2 hours in a
complete run cycle.
2. Turn dial CLOCKWISE
one or more complete revolutions
until the present time is aligned
with the time-of-day indicator
point.
3. Fill the unit with water by turning
on the sink water taps, then plug
the Big Dipper unit into grounded
electrical outlet.
4. Tabs pushed IN = ON
Tabs pushed OUT = OFF
Time-of-day
indicator point
Tabs punched in
indicate “ON”setting
Tabs NOT
punched
in indicate
“OFF”setting
Dial rotates
Clockwise

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 7
Big Dipper® IS System Series
Troubleshooting
Big Dipper unit overows
(1) Check to see that the outlet pipe is not reduced to a
smaller size, the outlet piping is vented, has as few 90
degree outlet turns as possible, and that no “P” trap is
installed on the outlet. Re-plumb the piping, if neces-
sary. Check outlet piping for clogs. Have a plumber
clean the line, if necessary.
2) Make sure that the solids strainer is in place and
emptied daily.
3) Check the bottom of the grease chamber for exces-
sive solids and silt buildup which may be blocking the
outlet bafe. Disconnect the power and use a long
handled spatula or similar instrument to stir the bottom
while water ows through the unit. If necessary, drain
and clean the sediment from the unit. To prevent recur-
rence, schedule this cleaning to be done on a regular
basis (properly used, a wet vac may be appropriate for
cleaning sediment from the bottom of the unit).
4) Make sure the ow rate to the unit does not exceed the
maximum ow rate, which is shown on the nameplate.
If necessary, have a plumber install an approved ow
control to restrict the inlet ow to the specied level or
install a properly sized Big Dipper for the application.
Excessive water observed in the grease collection
container
1) Check Timer for excessive “on” time. Unit will pick
up incidental water after all grease is removed.
2) Make sure that the water ow to the unit does not
exceed the rated ow and there are no drain line clogs
downstream from the unit.
No grease is collected in the container
(1) Check to be sure the power is on and the time con-
trol is set correctly. The “on” time should be no less
than 15 minutes per day. There is a Power Indicator
Light under the Timer which indicates that Power is
reaching the unit. If this light is not Red, power is not
reaching the unit.
(2) Remove the lid and clean away any buildup that
may be present on the wiper blades or collection trough.
Make sure the wiper blade(s) are properly in place on
the skimmer wheels. Replace wiper blades when worn
or warped.
(3) Press the Jog Switch button on the side of the center
module to ensure that the skimming wheel turns.
CAUTION: Keep your hands away from moving parts
to avoid possible injury. If the skimmer motor does not
come on, the motor assembly must be replaced.
(4) Check for congealed grease in the unit. If the Big
Dipper’s heating element is not warming the unit, the
heating element must be replaced.
(5) Some sites do not generate enough grease to be
captured by the skimming process. Set Timer for mini-
mum operation - 1 Tab (15 Min.)
Objectionable odor
(1) Make sure grease/oil is being skimmed properly
from the unit.
(2) Check the timer settings for excessive “on” time.
Also check to see if any water is collected in the grease
collector. Reduce operating time until water is no longer
observed in the grease collector.
(3) If excessive sediment has collected on the bottom
of the unit, clean the unit as described in item 3 in “Big
Dipper unit overows.”
(4) Clean the solids strainer and grease collection
container more frequently.
(5) Grease interceptors, grease traps, automatic re-
covery units, grease removal devices and other similar
plumbing devices receiving kitchen ows from sinks,
oor drains, woks and other food bearing sources may
generate odors. There are many factors inuencing
odor evolution and dissemination. These include room
ventilation, kitchen menu, ambient temperatures, ware
washing practices, grease/oil input, daily input uid vol-
ume, sanitizers, installation plumbing design and product
maintenance/upkeep. Odors are usually prevented by
good area ventilation, frequent uid inputs, good product
maintenance practices and proper product installa-
tion. Additional steps, including aeration, chlorination,
improved area ventilation and additional maintenance
control, may be needed at some sites.

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 8
How To Reverse Big Dipper®
IS System Unit Operation
How To Reverse Big Dipper® IS System Unit Operation
*Note:
W-750-IS has one (1) module.
W-1250-IS has two (2) modules.
1) Unlatch the Unit lid. Pull the
side wings outward.
2) Lift the center module up off of
the unit, ensuring clearance for the
heater.
3) Rotate the center module
180º.
4) Lower the center module back
down on top of the unit. Move the
two side wings back into place
& fasten all latches.
1) 2)
4)3)
Grease
Outlet
Heater
Power
Cord
Clearance Required
To Remove Lid
14.00”
*ALWAYS UNPLUG UNIT BEFORE REMOVING LID
*SYSTEM WILL NOT OPERATE UNLESS CENTER MODULE IS IN PLACE

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 9
Venting the Outlet
An outlet vent or approved vacuum breaker of
at least 1/2 the diameter of the system’s outlet
connection must be present as close as pos-
sible to the Big Dipper outlet to prevent possible
siphonage problems. Failure to provide a vent
for the system voids Thermaco’s Warranty for
the system.
For High Head Height Applications Over Six
(6) Feet (1.95 m)
Big Dipper systems are equipped with an
internal ow regulator located inside the inlet
end of the system. Verify its location and
placement prior to connecting the inlet pip-
ing. If your code requires a vertical type ow
regulator, an approved control with a ow rat-
ing matching the system’s ow rate should be
used. Note: When a Big Dipper is servicing
multiple xtures, some codes require separate
ow controls for each xture. See following
page for suggested high head height ow
regulation installation.
Do Not Use With Food Grinders, Potato Peel-
ers or Waste Disposal Units
If the system is connected to a Waste Disposal
Unit, Garbage Grinder or Potato Peeler, Ther-
maco’s Warranty will be void.
Big Dipper® IS System
Plumbing Installation
Big Dipper® IS System Plumbing Installation
Locating the Unit
To minimize grease build-up in piping, a Big
Dipper system should be located as close as
possible to the xture it is serving. The sys-
tem should be visible and easily accessible for
maintenance and inspection. The unit must
be in a level position. Be sure to check the
Specication Sheet for your model for the
exact clearances needed for installation. If
the system is located directly on the oor, the
bottom should be sealed to the oor with an
approved silicone type sealant. Make sure the
height above the Internal Strainer access cover
is enough to remove the strainer basket.
Inlet/Outlet Piping
The inlet and outlet piping connections require
exible sleeve pipe couplings. Keep outlet pip-
ing as straight as possible. Use only “sweep”
connections. Do not reduce the pipe sizing
on the outlet piping. Do not install “P” trap on
outlet connection of system. (Note: The system
already has a internal gas trap)
Flow Controls
Big Dipper systems are equipped with an internal
ow control located inside the inlet end of the
system. Verify its location and placement prior
to connecting the inlet piping.
Fill Unit With Water Before Applying Power
Big Dipper systems, equipped with an electric
heating element, MUST be lled with water before
energizing the power to the system. Failure to
do so may damage the electric heating element.
These elements will NOT be replaced under
Thermaco’s Warranty.
Note: Drawing for reference only. Equip-
ment must be installed in compliance
with all applicable laws, regulations and
codes, including plumbing codes. Instal-
lation should be performed by a qualied
plumber.

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 10
Big Dipper® IS System
Plumbing Installation
Big Dipper® IS System Plumbing Installation
(For Installations With Head Height Greater Than 6 feet (1.95m))
For installations where there is a signicant amount of head height (More than 6 ft./1.95 m),
Thermaco, Inc. recommends installation of the optional VFCA Vented Flow Control module.
VFCA-75 Vented Flow Control for W-750-IS
VFCA-125 Vented Flow Control for W-1250-IS
Installations where head
height is greater than 6 feet
(1.95 m)
Big Dipper® IS Unit
NOTE: Drawing for reference only. Equipment must be installed in compliance with all applicable laws, regu-
lations and codes, including plumbing codes. Installation should be performed by a qualied plumber.
Drainage Piping
from Kitchen
Flow Control Vent/Air Intake
(Note: Flow Control Vent may be independent direct connect
to atmosphere or code-approved air admittance valve. To
be installed above sink ood rim.)
NEVER CONNECT TO FACILITY VENT
Outlet Vent
(Note: Vent may be facility vent connection or
code-approved air admittance valve)
* Installation in high head height
locations requires removal of the
Internal Flow Control (small rub-
ber cap under no-hub coupling
over the Inlet).
Optional P-Trap

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 11
PROPERLY
DISPOSE OF
CONTENTS
DAILY
Big Dipper® IS System
Electrical Installation
Big Dipper® IS System Electrical Installation
Electrical Panel
(NOT SUPPLIED)
Duplex Outlet
(NOT SUPPLIED)
Big Dipper Internal Strainer (IS) Models
The Big Dipper W-750-IS model is equipped with one (1) 24 Hour/96 Event
time controller while the W-1250-IS model is equipped with two (2) time
controllers. The timer is located under the hinged lid of the motor enclosure
on top of the lid of Big Dipper (See Timer Operation Instructions). The Big
Dipper should only be plugged into a properly grounded 3-prong 120
VAC or 230 VAC outlet. If possible, the power supply outlet for the Big
Dipper should be connected to an electrical circuit controlled by a ground
fault circuit breaker.
There is a Power Indicator Light that will glow Red if power is being fed to
the unit. If this light is off, power is not reaching the unit.
This Big Dipper unit is shipped from the Factory wired for Simultaneous
Operation. This means the Heater and Motor operate at the same time
under timer control. Continuous Heater Operation is where the Heater is
active at all times. To switch to Continuous Heater Operation, switch the
RED WIRE on the THERMOSTAT with the BLACK WIRE. (Instructions are
on the wiring Diagram in the electrical enclosure.
Note: The Big Dipper unit will not operate when the lid is removed.
Timer*
(Under Hinged Lid)
Electrical Junction
Box (Hidden)
*W-1250-IS Only
Note:
Time Clock Supplied with
system.
Drawing for reference only.
Equipment must be installed
in compliance with all appli-
cable laws, regulations and
codes, including electrical
codes. Installation should
be performed by a qualied
electrician.
Power Indicator Light
(Hidden)
115VAC Circuit,
From Ground Fault
Circuit Breaker
(NOT SUPPLIED)
*For 230 VAC Units use
230 VAC Circuit
Big Dipper Electrical Requirements
W-750-IS: 4.6 Amps @ 115VAC 60Hz (535 Watts)
W-1250-IS: 9.1 Amps @ 115VAC 60Hz (1055 Watts)
*For 230 VAC Units:
W-750-IS-E: 2.3 Amps @ 230VAC 50Hz (535 Watts)
W-1250-IS-E: 4.6 Amps @ 230 VAC 50Hz (1055 Watts)

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 12
Big Dipper® IS System
Wiring Diagram
NOTE:
220-240V Units (International Units) have the
following wire color changes:
On the POWER SUPPLY CORD:
The Black Wire becomes Brown
The White Wire becomes Blue
The Green Wire becomes Yellow/Green
Wiring Diagram For Big Dipper Models
W-750-IS and W-1250-IS
1 2 3 4 5TIMER
MOTOR
HEATER
THERMOSTAT
GREEN
WHITE
BLACK
WHITE
WHITE
BLACK
BLACK
WHITE
WHITE
WHITE
POWER SUPPLY CORD
BLACK
BLACK
FULLY INSULATED
QUICK CONNECT
PIGGY-BACK
CONNECTOR
FULLY INSULATED
FEMALE CONNECTOR
BLACK
RED
RED
INTERCHANGE FULLY INSULATED
QUICK CONNECTORS TO CHANGE
HEATER OPERATING MODE. RED
WIRE TO THERMOSTAT GIVES
SIMULTANEOUS HEATER/MOTOR
OPERATION. BLACK WIRE TO
THERMOSTAT GIVES CONTINUOUS
HEATER OPERATION.
NEON
LAMP
GREEN
GREEN
RING TERMINALS TO GROUND STUD
ON MOTOR MOUNT BRACKET
GROUND WIRE ATTACHED
TO HEATER
SWITCH CONNECTOR
HEATER
CONTROL
SWITCH
WHITE
BLACK
BLACK
MOTOR
TEST
SWITCH
INTERLOCK
SWITCH
PLUG/PIN
CAP/SOCKT
1
2
B. KYLES 10/04/02
N/A
N/A
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










 


 

 
  
  
WIRING DIAGRAM FOR C SERIES BIG DIPPER
B. KYLES 10/04/02

ALL 12 BWK03/01/11
ALL 13 BWK03/15/11
ALL 14 BWK05/26/11

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 13
Big Dipper® IS System
Wiring Diagram
Junction Box Wiring Diagram For Big Dipper
W-1250-IS
Junction Box Wiring Diagram For Big Dipper
W-1250-IS-E (230 VAC)
POWER
RING TERMINALS TO
GROUND STUD
SUPPLY
CORD
GREEN
WHITE
BLACK
GREEN
RECEPTACLE
ENCLOSURE

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 14
Big Dipper® IS System
Electrical Components
Motor*
Part# M-58**
Safety Switch
Part# MSS-7
Heater*
Part# H-8**
Thermostat*
Part# TSTAT-4
Power Indicator Light
Part# ILA-1
Timer*
Part# ETC-1
*Note:
W-750-IS system requires one (1)
W-1250-IS system requires two (2)
** 230 VAC Units use M-58-230
and H-8-230

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 15
Big Dipper® IS System
Component Identication
*Note:
W-750-IS system requires one (1)
W-1250-IS system requires two (2)
Hinged Skimming Wheel
Cover
Motor/Electrical
Cover
Timer
Cover
Grease
Collector
Strainer Basket
Cover
Big Dipper Internal Strainer (IS) Lid Components (With Covers In Place)
Inlet Outlet
Wheel Wiper Assembly*
Part #WWA-4
Skimming Wheel Assembly*
Part #PDA-3
Wheel Drive Sprocket*
Part #WDS-3
Big Dipper Internal Strainer (IS) Lid Components (With Wheel Cover Removed)
Inlet Outlet
Flow Control
(Covering Inlet)
Safety Switch (Under Motor Cover)*
Part #MSS-7
Power Indicator
Light
Wiper Blades (2)
Part # PB-3
Jog Switch
Energy Saver/
Heater Switch

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 16
Motor Jog Switch*
Part# MJS-1
Energy Saver
Heater Switch*
Part# ESHS-1
Big Dipper® IS System
Component Identication
Big Dipper® IS System Component Identication
Timer Cover*
Part# MTC-1
Wheel Cover*
Part# MSC-1
Wheel Wiper Assembly*
Part# WWA-4
Rear Electrical Enclosure Assembly*
Part# REEA-1
Wheel Drive Sprocket*
Part# WDS-3
Cotter Pin*
Part# CP-1
Wheel Axle*
Part# WSS-2
Skimming Wheel*
Part# PDA-3
*Note:
W-750-IS system requires one (1)
W-1250-IS system requires two (2)
Front Electrical
Enclosure Assembly*
Part# FEEA-1

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 17
EMPTY INTO
COOKING OIL
RECYCLING
CONTAINER
DAILY
Big Dipper® IS System
Replacement Parts
Big Dipper® IS System Replacement Parts
SOLIDS STRAINER BASKET
FOR MODEL# USE PART#
W-750-IS AND W-1250-IS ST-97
GREASE/OILS COLLECTION CONTAINER*
FOR MODEL W-750-IS, USE PART# GC-7
FOR MODEL W-1250-IS, USE PART# GC-6 (2)
TIMER (Under Cover)*
FOR ALL MODELS USE PART# ETC-1
*Note:
W-750-IS system requires one (1)
W-1250-IS system requires two (2)
NOT SHOWN:
MOTOR*
PART# M-58
M-58-230 (For 230 VAC Units)
HEATER*
PART# H-8
H-8-230 (For 230 VAC Units)
THERMOSTAT*
PART# TSTAT-4
INTERNAL FLOW CONTROL
(1 per unit)
PART# MFC-75 FOR W-750-IS
PART# MFC-125 FOR W-1250-IS
LID GASKET
PART# RG-7
WIPER BLADES
PART# PPB-3
•W-750-IS requires (2)
•W-1250-IS requires four (4)
WHEEL WIPER ASSEMBLY*
PART# WWA-4
WHEEL DRIVE SPROCKET*
PART# WDS-3
SKIMMING WHEEL ASSEMBLY*
PART# PDA-3
MOTOR JOG SWITCH*
PART# MJS-1
ENERGY SAVER HEATER SWITCH*
PART# ESHS-1

©2013 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone [phone] MNL-ISCU14000 18
Big Dipper® Limited Warranty & Remedy
Thermaco, Inc. warrants to the original user that the products manufactured by it delivered with this warranty shall
be free from material defects in workmanship and materials for a period of 12 months from the date of invoice to the
distributor (if sold by an authorized Thermaco distributor) or the date of invoice to the purchaser (if sold directly by
Thermaco, Inc.), but in no event longer than 15 months from date of shipment from Thermaco’s production facility.
Any claim must be made in writing to Thermaco at 646 Greensboro Street, Asheboro, NC 27203 promptly after
discovery of the defect and within the applicable warranty period. The product must be delivered, prepaid, to Ther-
maco, together with proof of purchase, the serial number from which the item was removed and a return authoriza-
tion number issued by Thermaco. If Thermaco determines upon examination that the component is defective and
that the warranty conditions are met, Thermaco’s sole obligation under this warranty, and the purchaser’s sole and
exclusive remedy, is the repair or replacement, at Thermaco’s option, of the defective component, including parts
and labor. The replacement will be furnished F.O.B. point of shipment. If Thermaco determines that the component
is not defective or that the other conditions of this warranty are not met, then any return of such part to the purchaser
shall be at purchaser’s cost.
This warranty shall not cover any defect in otherwise covered products resulting directly or indirectly from: (i) failure
to properly install, operate or maintain the product in accordance with Thermaco’s instructions and procedures,
including, without limitation, use in excess of rated ow, operation without timer control, improper electrical service,
use to remove emulsied fats and oils or use that fails to comply with applicable laws, regulations or codes; (ii) dam-
age in transit, handling or installation; (iii) modications, adjustments, repairs, or alterations made by unauthorized
persons; or (iv) other causes not arising out of defects in workmanship or materials. Thermaco shall not be respon-
sible for damage to products resulting from vault ooding, sewer line back-up, pumping or lift station failure, ambient
water ow or other sources of water damage. This warranty does not cover equipment or parts not manufactured
by Thermaco. Purchaser’s costs relating to any service, adjustment, removal, repair, packing, or otherwise incurred
with respect to the defect prior to submission for warranty are the responsibility of purchaser.
No distributor, sales person or other person is authorized to make any warranty statements on behalf of Thermaco
regarding Thermaco products other than as set forth in this warranty. This statement of warranty supersedes any
quote, brochure, or other statement or document with respect to warranty of Thermaco products.
EXCEPT AS EXPRESSLY SET FORTH ABOVE, THERMACO, INC. MAKES NO REPRESENTATIONS, WAR-
RANTIES OR GUARANTEES, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, AS TO
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WHETHER OR NOT THERMACO HAD
KNOWLEDGE OF PURCHASER’S PARTICULAR REQUIREMENTS OR NEEDS, OR WITH RESPECT TO ODOR
GENERATION OR OTHER INCIDENTALS RELATING TO USE OF THE PRODUCT.
The sole and exclusive remedy with respect to this warranty any other claim relating to defects or any other con-
dition or use of Thermaco products, however caused, and whether such claim is based upon warranty, contract,
tort, strict liability or any other theory, is LIMITED to the repair or replacement of the product, excluding labor or
any other cost to remove or install said the product or, at Thermaco’s option, repayment of the purchase price. IN
NO EVENT SHALL THERMACO, INC. BE LIABLE, WHETHER IN CONTRACT, WARRANTY, TORT (INCLUDING
NEGLIGENCE), STRICT LIABILITY, INDEMNITY OR ANY OTHER LEGAL THEORY, FOR INCIDENTAL OR CON-
SEQUENTIAL DAMAGES, OR FOR ANY OTHER LOSS OR COST OF A SIMILAR TYPE. UNDER NO CIRCUM-
STANCES WILL THE AGGREGATE LIABILITY OF THERMACO FOR ANY CAUSE OF ACTION RELATED TO THE
PRODUCTS COVERED HEREBY EXCEED THE NET PURCHASE PRICE RECEIVED BY THERMACO FOR THE
PRODUCTS. Any action or suit by purchaser against Thermaco relating to Thermaco products must be brought
within one (1) year of the date of the invoices referenced above. The exclusions and limitations set forth herein are
separate and independent from any remedies which purchaser may have hereunder and shall be given full force
and effect whether or not any or all such remedies shall be deemed to have failed of their essential purpose.