Dean Portable Filters MF90 Series User manual

PARTS LIST
INCLUDED
Dean, a member of the Commercial Food Equipment Service Association, recommends using
CFESA Certified Technicians.
24-Hour Service Hotline [phone] Price: $12.00
819-5934
OCT 2010
MF90 Series Portable
Filtration Systems
Installation & Operation Manual
MF90-80, -80LP & -110 Models
"U" & "AU" CONFIGURATIONS

Please read all sections of this manual and retain for future reference.
Installation, maintenance, and repairs should be performed by your Frymaster/Dean
Authorized Service Agency.
WARNING
Safe and satisfactory operation of your equipment depends on its proper installation.
Installation MUST conform to local codes, or in the absence of local codes, with the
latest edition of the National Electric Code, N.F.P.A. 70.
WARNING
ELECTRICAL GROUNDING INSTRUCTIONS
This filter is equipped with a three-prong, grounded plug for your protection against
shock hazard and should be plugged directly into a properly grounded, three-hole
receptacle. Do not cut off, remove or otherwise bypass the grounding prong on this
plug.
If it is necessary to use an extension cord, it MUST be a three-conductor, grounded
cord of 16 gauge or greater.
DANGER
Do not filter more than one fry tank at a time.
Hot fluid – Do not fill above a point 1-½ inches below the OIL CONTAINER RIM.
WARNING
This filter unit is not suitable for outdoor use. When operating this unit, it MUST be
placed on a horizontal surface.
WARNING
This filter unit is not suitable for installation in an area where a water jet can be used,
and this appliance MUST NOT be cleaned with a water jet.

NOTICE:
If this filter unit is cleaned with water, disconnect the unit from power source before
cleaning and thoroughly dry the filter unit before reconnecting to electrical power
source.
DANGER
The crumb tray (if equipped) in portable filter systems must be emptied into a fireproof
container at the end of frying operations each day. Some food particles can
spontaneously combust if left soaking in certain shortening material.
NOTICE:
Drawings and photos used in this manual are intended to illustrate operational, cleaning
and technical procedures and may not conform to on-site management operational
procedures.
NOTICE
IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS
ENODIS EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART
PURCHASED DIRECTLY FROM FRYMASTER/DEAN, OR ANY OF ITS AUTHORIZED
SERVICE CENTERS, AND/OR THE PART BEING USED IS MODIFIED FROM ITS
ORIGINAL CONFIGURATION, THIS WARRANTY WILL BE VOID. FURTHER,
FRYMASTER/DEAN AND ITS AFFILIATES WILL NOT BE LIABLE FOR ANY CLAIMS,
DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER WHICH ARISE DIRECTLY
OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF ANY
MODIFIED PART AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICE
CENTER.

MF90 Series Portable Filtration Systems
TABLE OF CONTENTS
PAGE #
1.
1.1
1.2
1.3
1.4
1.5
1.5.1
2.
2.1
2.2
2.3
2.4
3.
3.1
3.1.1
4.
4.1
4.2
4.3
4.4
4.5
5.
5.1
5.2
5.3
5.4
6.
6.1
6.2
6.3
6.3.1
6.3.2
6.3.3
6.3.4
7.
7.1
7.2
INTRODUCTION
Parts Ordering/Service Information
ServiceInformation
AfterPurchase
SafetyInformation
Service Personnel
Definitions
IMPORTANT INFORMATION
General
RatingPlate
Pre-Installation
Unpacking the Filter System
FILTER PREPARATION
Assembling the Filter System
Filter Paper Configuration
FILTEROPERATION
General
FilteringTools
FilteringPreparation
Changing Filter Paper
UnitOperation
PREVENTATIVE MAINTENANCE
General
EachFilterUse
Daily- Close of Business
Weekly
TROUBLESHOOTING
OperatingProblems
General Troubleshooting
WiringDiagrams
MF90U 120V Wiring
MF90U 230V Wiring
MF90AU 120V Wiring
MF90AU 230V Wiring
PARTSLIST
MainComponents
Plumbing, Oil-Return Components and Accessories
1–1
1–1
1–1
1–2
1–2
1–3
1–3
2–1
2–1
2–2
2–2
2–3
3–1
3–1
3–1
4–1
4–1
4–2
4–2
4–2
4–6
5–1
5–1
5–1
5–2
5–2
6–1
6–1
6–1
6–3
6–3
6–3
6–4
6–5
7–1
7–1
7–4

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 1: INTRODUCTION
1-1
1.1 Parts Ordering/Service Information
Place parts orders directly with your local Frymaster/Dean Authorized Service Agency. A list of
ASA’s was included with the filter when shipped from the factory. If you do not have access to this
list, please contact the Frymaster/Dean service department at 1-800-551-8633 or 1 318-865-1711, or
go to Frymaster/Dean’s website at: www.frymaster.com.
To help speed your order, the following information is required:
Model Number Type
Serial Number
Optional Features
Item Part Number Quantity Needed
1.2 Service Information
Call the 1-800-551-8633 or [phone] Service Hotline number for the location of your nearest
Authorized Service Agent. Always give the model and serial numbers of your filter unit. Also,
identify if your unit is supplied with or without a heater.
To assist you more efficiently, the following information will be needed:
Model Number Type
Serial Number
Optional Features
Nature of Problem:
Additional information (i.e. oil temperature at filter time, time of day and other pertinent
information) may be helpful in solving your service problem.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 1: INTRODUCTION
1-2
1.3 After Purchase
In order to improve service, have the following chart filled in by the Dean Authorized Service
Technician who installed this equipment.
Authorized Service
Technician/ASA
Address
Telephone/Fax
Model Number
Serial Number
1.4 Safety Information
Before attempting to operate your unit, read the instructions in this manual thoroughly.
Throughout this manual, you will find notations enclosed in double-bordered boxes similar to the
ones below.
CAUTION
CAUTION boxes contain information about actions or conditions that may cause or result in a
malfunction of your system.
WARNING
WARNING boxes contain information about actions or conditions that may cause or result in
damage to your system, and which may cause your system to malfunction.
DANGER
DANGER boxes contain information about actions or conditions that may cause or result in injury
to personnel, and which may cause damage to your system and/or cause your system to malfunction.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 1: INTRODUCTION
1-3
1.5 Service Personnel
1.5.1 Definitions
A. Qualified and/or Authorized Operating Personnel
1. Qualified/authorized operating personnel are those who have carefully read the information
in this manual and have familiarized themselves with the equipment functions, or have had
previous experience with the operation of equipment covered in this manual.
B. Qualified Installation Personnel
1. Qualified installation personnel are individuals, or firms, corporations, or companies that,
either in person or through a representative, are engaged in and are responsible for the
installation of electrical appliances. Qualified personnel must be experienced in such work,
be familiar with all electrical precautions involved, and have complied with all requirements
of applicable national and local codes.
C. Qualified Service Personnel
1. Qualified service personnel are those who are familiar with Dean equipment and have been
authorized by Dean to perform service on Dean equipment. All authorized service
personnel are required to be equipped with a complete set of service parts manuals and stock
a minimum amount of parts for Dean equipment. A list of Dean Authorized Service
Agencies (ASA’s) was included with the fryer when shipped from the factory. Failure to
use qualified service personnel will void the Dean warranty on your equipment.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 2: IMPORTANT INFORMATION
2-1
2.1 General
MF-90 portable filters can be used with a variety of Dean fryers, as well as other manufacturers’
equipment. Oil capacity ranges from 80 to 110 pounds of oil, depending on the model. Unit length,
width, height and tank height dimensions for all units are listed in the table below.
Model Unit Height
(inches) Unit Width (inches) Unit Length (inches) Tank Height (inches) Oil Capacity (pounds)
MF-90/80 24 17 ¾ 24 ¾ 10 ¾ 80
MF-90/80 LP 24 18 33 ½ 9 105
MF-90/110 26 ¼ 17 ¾ 24 ¾ 12 ¾ 110
Unit Length Unit Width
Unit Height
Tank Height
MF90 Series filter unit dimensions (unit and tank heights are measured from bottom
of casters to top of unit and tank, respectivel
y)
.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 2: IMPORTANT INFORMATION
2-2
2.1 General (cont.)
The used oil may be drained by gravity from the fryer into the filter pan (MF90 "U" models), or
removed from the fryer by use of a suction/return hose (MF90 "AU" models). On "AU" models, the
oil is pumped back into the frypot using the same suction/return hose.
Oil or shortening is filtered through filter paper. Filter powder, which enhances the filtering process,
is distributed over the paper prior to filtering.
All units are shipped completely assembled with accessories packed inside the filter pan. All units
are adjusted, tested and inspected at the factory before shipment.
WARNING
The on-site supervisor is responsible for ensuring that operators are made aware of
the inherent dangers of operating a hot oil filter system, particularly the aspects of
oil filtration, and draining/cleaning procedures.
A 7-amp (115V-domestic) or 5-amp (230V-international) circuit breaker installed on the filter unit
switches the power OFF if an overload occurs.
NOTE: If the circuit breaker is triggered, depress the reset button to activate the circuit after the
failure has been detected and repaired.
2.2 Rating Plate
Information on the rating plate includes model and serial numbers, as well as electrical requirements.
The rating plate is located on the back housing, near the electrical receptacle. Have the rating plate
information handy when communicating with the factory about a unit or requesting special parts or
information. Without this information, proper identification of the unit cannot be confirmed.
2.3 Pre-Installation
NOTE: Failure to use qualified service personnel will void the Dean warranty.
A. Standards: Use of this filter unit must be in accordance with all applicable state and local
codes.
B. Electrical Connections: Domestic MF90 filter units require a 115V 60 Hz., 15 amp electrical
supply. International/CE units require 230V 50 Hz., 7 amp electrical supply. Units are
equipped with a grounded male receptacle for use with a 16-3 SJT power cord set. If an
extension cord is required, it must be a three-conductor, grounded power cord of at least 16
gauge.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 2: IMPORTANT INFORMATION
2-3
2.4 Unpacking the Filter System
Ensure the container is upright. Unpack the filter carefully and remove all accessories from the
carton. Do not discard or misplace parts and/or accessories; they will be needed for filter setup
and operation. Any accessories or starter kits included with the unit will be packaged inside
the filter tank.
After unpacking, immediately check the equipment for visible signs of shipping damage. If
such damage has occurred, contact the carrier and file the appropriate freight claims. Do not
contact the factory, as the responsibility of shipping damage is between the carrier and dealer
or end-user.
If your equipment arrives damaged:
a. File claim for damages immediately – Regardless of extent of damage.
b. Visible loss or damage – Be sure this is noted on the freight bill or express receipt and is
signed by the person making the delivery.
c. Concealed loss or damage – If damage is unnoticed until equipment is unpacked, notify
freight company or carrier immediately, and file a concealed damage claim. This should be
done within 15 days of date of delivery. Retain the shipping container for inspection.
NOTE: Dean does not assume responsibility for damage or loss incurred in transit.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 3: FILTER PREPARATION
3-1
3.1 Assembling The Filter System
On initial installation and before each use, remove all loose parts from the filter, wash the filter pan
and all accessories in hot, soapy water and dry thoroughly.
WARNING!
Water or boil-out solution MUST not be allowed to drain into the filter pan or filter
system. Irreversible damage will result if water is allowed into the system, and the
warranty will be voided.
The MF90 portable filtration system uses a filter support grid, one sheet of filter paper and a hold-
down ring to secure the filter paper in place.
3.1.1 Filter Paper Configuration
See illustration for proper assembly.
1. Filter Pan Cover
2. Hold-Down Ring
3. Filter Paper (one sheet)
4. Screen/Support Grid
5. Filter Pan Assembly
A. First, place the support grid in the bottom of filter pan.
B. Place one sheet of filter paper on top of the support grid. Be sure the paper covers the whole
filter pan bottom.
C. Position the hold-down ring on top of the filter paper and latch the hold-down ring and filter
paper securely against the filter pan bottom, forming a tight seal.
D. Sprinkle 8 ounces of filter powder over the filter paper, distributing the powder as evenly as
possible. If filtering a second frypot immediately after the first, add only 4 ounces of filter
powder for the second filtering.
E. Place the crumb catcher screen (if applicable) in the filter pan. Allow the crumb catcher screen
to rest on the top edges of the hold-down ring.
F. Place filter pan cover onto the filter pan assembly.
12
3
4
5

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 3: FILTER PREPARATION
3-2
3.1.1 Filter Paper Configuration (cont.)
G. Position filter under the fryer drainpipe for gravity drain operations, or nearby the fryer for
suction operations ("AU" models only). Lock rear casters to prevent filter from moving out of
position during the filtering process.
MF-90 portable filter (Low Profile shown) positioned correctly next to fryer drain valve,
with rear casters locked in place.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-1
4.1 General
The Dean Portable Filters are designed to operate primarily as an independent filter unit. Operations
always start by ensuring the unit is properly plugged in, then rolling the filter to the fryer to be
filtered. The filter will work directly under the fryers’ drain valves, or close to the fryer ("AU"
suction models only). The general layout of a MF90 "U" Series Portable Filter System with major
components identified is illustrated below.
FRYPOT
WAND OIL-RETURN HOSE
QUICK-DISCONNECT
COUPLING
PUMP
FILTER PAN
DRAIN VALVE WITH
EXTENSION
LOCKING
REAR
CASTERS
Arrows indicate direction of oil flow during the filtration process.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-2
4.2 Filtering Tools
These tools are not required, but are recommended to make the filtering task easier.
A. Measuring Cup: Used to measure eight ounces by volume of filter powder.
B. Scrub Brush: To clean sediment and residue from the filter pan and frypot.
C. Appropriate Clothing.
4.3 Filter Preparation
1. Position the MF-90 filter next to the fryer. Remove filter pan lid and position filter unit
under frypot drain-valve extension ("U" units) or nearby the fryer ("AU" units).
2. Ensure the filter power switch is in "OFF" position prior to connecting to power supply.
3. Plug power cord into electrical outlet. The filter unit is ready for filtering. After filtering,
follow instructions in Section 4.4, Changing Filter Paper.
DANGER
The crumb tray (if equipped) in portable filter systems must be emptied into a
fireproof container at the end of frying operations each day. Some food particles
can spontaneously combust if left soaking in certain shortening material.
4.4 Changing Filter Paper
Filter paper should be replaced after each filter
session, and most certainly at the beginning of
each workday. If filter paper is replaced once
per day, excess sediment should be scraped from
the filter paper after each frypot is filtered (see
photo). Use care not to tear the paper when
scraping off sediment. Filter at closing if
possible. This ensures the oil/shortening is at
proper filtering temperature.
Note: If filtering at closing, remove and discard
the used filter paper in a fire-proof container
when filter operations are complete. Wash all
components in soapy water and dry completely.
If filtering more than one frypot with the same
filter paper, scrape excess sediment from the
filter paper after each filtering.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-3
4.4 Changing Filter Paper (cont.)
Remove and replace the paper as follows:
1. Remove filter cover. Place the hose wand in the wand holster, located on the left side of the
pan (arrow).
2. Open the locking latches of the hold-
down ring and lift the ring out of the
filter tank.
3. Roll both ends of the filter paper into the
center, ensuring no sediment falls out,
and discard.
Removing hold-down ring. Note location of
wand holster (arrow).
Removing dirty filter paper from pan.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-4
4.4 Changing Filter Paper (cont.)
4. Remove and check the filter paper
support screen for cleanliness and clean
if necessary.
5. Check the filter-pan for cleanliness and
clean if necessary; check the drain ports
at the bottom rear of the filter pan and
clear any solidified shortening from the
opening. Also ensure vent hole on top of
tube is clear of shortening and/or debris
(white arrow).
6. Replace the filter paper support screen
and place a new sheet of filter paper on
top of the screen.
Removing paper support screen from pan.
Solidified shortening can build-up in the nipple-
pipe assembly.
Placing new sheet of filter paper over paper
support screen.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-5
4.4 Changing Filter Paper (cont.)
7. Replace the hold-down ring and secure
by locking latches in place.
8. Measure 8 ounces of filter powder and
distribute evenly over the paper surface.
9. Replace filter pan cover. The filter is
ready for operation.
Secure the hold-down ring latches to lock filter
paper in place.
Evenly distribute 8 ounces of filter powder over
the filter paper surface.
Filter unit ready for filtering operations.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-6
4.5 Unit Operation
1. When filtering, follow these steps:
2. Follow the appropriate Sections 4.3 and 4.4 to prepare the filter unit for operation.
3. Position the filter unit under the fryer drain valve extension for gravity drain, or near the fryer for
"suction" operations if the unit is an "AU" unit. On "AU" units, ensure the wand filter screen is
screwed securely onto the wand end, prior to pumping oil/shortening out of fryer.
4. Turn the fryer main power switch to the "OFF" position.
DANGER
Do not leave filter unit unattended during the filtering operation. Pressurized oil
moving through the lines can cause the flexible return hose and wand assembly to
pop loose and spray hot oil.
Avoid spilling hot oil onto floor surfaces. When draining fryer into filter, never
exceed the maximum capacity of the filter pan.
5. Open the fryer door and ensure the filter is in the proper position under the fryer drain valve
extension ("U" units- see photo below), or close to the fryer ("AU" units). Lock rear casters to
prevent filter movement during the filtering process.

MF90 SERIES PORTABLE FILTRATION SYSTEMS
CHAPTER 4: FILTER OPERATION
4-7
4.5 Unit Operation (cont.)
DANGER
The oil temperature of the fryer to be filtered should be approximately 350°F (175°C).
Position drain handles properly prior to operating the filter unit. Failure to do this
can result in burn injury to the user.
6. Open the drain-valve and allow the frypot oil
to drain into the filter pan.
Note: When using "AU" units for suction
operation, insert the wand with filter screen
attached into the frypot, then place the switch
in the "IN" position. After all oil has been
pumped from the frypot, insert the wand end
into the wand holster. Ensure the wand is
placed securely in the holster, then place the
switch in the "OUT" position to circulate and
filter the oil.
7. With the oil return wand in frypot, turn filter
switch "ON" to begin pumping clean oil into
the fryer. Allow the oil to recycle through the
fryer for a few seconds to wash out sediment
on the bottom of the frypot before closing the
drain valve. When using "AU" units for
suction operation, place the switch in the
"OUT" position to return oil to the frypot. If
the frypot is drained by the suction method,
all sediment must be wiped out by hand prior
to returning filtered oil to the frypot.
Note: All units- The oil return wand can also
be mounted in the wand holster inside the pan,
for extended filtering periods (polishing) prior
to refilling frypot. NEVER LEAVE THE
FILTER SYSTEM UNATTENDED WHILE
FILTERING!
Frypot draining into filter pan. Ensure oil is at
operating temperature before opening drain
valve.
Use the nozzle to rinse sediment and debris
from the frypot during the filtering process ("U"
units only).