DEAN MF90AU-110 Service Manual

MF90 Series Portable Filters (CE)

Operation, Service & Parts Manual

MF90-110

"U" & "AU" CONFIGURATIONS

CE ONLY

Dean, a member of the Commercial Food Equipment Service Association, recommends using
CFESA Certified Technicians.

24-Hour Service Hotline [phone]

Price: $6.00

819-5711

05-99

Please read all sections of this manual and retain for future reference.

HORIZONTAL SURFACE.

Installation, maintenance, and repairs should be performed by your Dean Factory

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 U.S. NATIONAL
ELECTRIC CODE, NFPA 70-1984 (OR LATEST EDITIONS) OR APPROPRIATE
EUROPEAN COMMUNITY/NATIONAL CODES/STANDARDS.

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 THREE­CONDUCTOR, GROUNDED CORD OF 16 GAUGE OR GREATER.

CAUTION

DO NOT FILTER MORE THAN ONE FRY TANK AT A TIME.

HOT FLUID – DO NOT FILL BEYOND MAXIMUM FILL LINE

LOCATED ON THE OIL CONTAINER.

CAUTION

THIS FILTER UNIT IS NOT SUITABLE FOR OUTDOOR USE.
WHEN OPERATING THIS UNIT, IT MUST BE PLACED ON A

CAUTION

THIS FILTER UNIT IS NOT SUITABLE FOR INSTALLATION IN AN
AREA WHERE A WATER JET COULD BE USED, AND THAT THIS
APPLIANCE MUST NOT BE CLEANED BY A WATER JET.

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.

Micro Flo - 90 Series (CE) Portable Filtration Systems

Models MF90-U/110 & MF90-AU/110

OPERATION, SERVICE AND PARTS MANUAL

TABLE OF CONTENTS

PAGE

1. Parts Ordering And Service Information……………….…........... 2

2. Important Information……………………………………….......... 3

3. Installation………………………………………………….........…. 4

4. Daily Operation……………………...…………………….........….. 5

5. Cleaning and maintenance………………………………..........….. 8

6. Troubleshooting …………………....………………….........….….. 9

7. Parts Guide……...……………………………………….........……. 13

8. Wiring Diagrams for MF90-U/110 and MF90-AU/110 Filters...... 16

1. PARTS ORDERING AND SERVICE INFORMATION

1.1 ORDERING PARTS:

Customers may order parts directly from their
local Authorized Parts Distributor. For this
address and phone number, contact your
Maintenance & Repair Center or call the
factory. The factory address and phone number
are on the cover of this manual.

To speed up your order, the following
information is required:

Model Number
Type
Serial Number
With/Without Heater
Optional Equipment
Item Part Number
Quantity Needed

1.2 SERVICE INFORMATION:

Call the Dean Service Hotline number on the
cover of this manual or 1-318-865-1711 for the
location of your nearest Maintenance & Repair
Center. Always give the model and serial
numbers of your filter and fryer.

To assist you more efficiently, the following
information will be needed:

Model Number
Type
Serial Number
With/Without Heater
Optional Equipment

Nature of Problem
Any other information which may be helpful in
solving your service problem

2

2. IMPORTANT INFORMATION

2.1 GENERAL: The MF-90 portable oil

filters may be used with a variety of Dean
fryers, as well as other manufacturers’
equipment.

The used oil may be drained by gravity
(MF90-U/110) from the fryer into the
filter pan, or, on some models, MF90­AU/110, removed from the fryer by use of
a suction/return hose. It is then pumped
back into the fryer vessel by means of the
suction/return hose and nozzle assembly.

Filtering is accomplished through two
sheets of replaceable filter paper assisted
by a micro pre-coat filter powder.

CAUTION

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 aspects of oil filtration,
draining, and cleaning of the filter.

2.2 OPERATING CONTROLS:

Two types of portable filters are available.
The most common is “return only”.
Primary filter control on the MF90-U/110
model is a two-position switch (on/off), or
on units with the optional heater, a three­position switch (on/off/heater) is used.

The other type is “suction/return”.
Control on the MF90-AU/110 is by a
three-position switch (in/off/out). A pair
of swing-type check valves controls the
direction of oil flow. If any of these units
has an optional pan heater, the heater
switch is also mounted on the panel.

In many cases, a 60-minute timer may also
be activated to start the unit.

2.3 SAFETY FEATURES: On the

larger capacity filters, a 5-amp (230V) or a
7-amp (115V) circuit breaker switches the
power OFF if an overload occurs.

NOTE: If circuit breaker is triggered, depress

the reset button to activate the circuit
after the failure has been detected and
fixed.

2.4 RATING PLATE: Information on

this plate includes the model and serial
numbers as well as electrical requirements.
This data is essential when contacting the
factory about a unit or ordering special
parts.

2.5 PRE-INSTALLATION:

a. STANDARDS: Usage of this filter

unit must be in accordance with all
applicable state and local codes.

b. ELECTRICAL CONNECTIONS:

This unit requires connection to a
230V, 15 amp electrical supply. The
unit is equipped with a 3-wire, 16
AWG power cord. If an extension
cord must be used, it must be a three
conductor, grounded power cord of at
least 16 AWG.

2.6 UNPACKING THE FILTER:

Before unpacking, make certain the
container is upright. Unpack the filter
carefully and remove all accessories from
the carton, being careful not to discard or
misplace any parts, as they will be needed.
Loose parts include a starter kit and
accessories that may have been ordered.
These are packaged inside the filter tank.
The tank top is strapped to the shipping
frame.

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,
the responsibility of shipping damage is
between the carrier and the dealer or end­user.

3

3. INSTALLATION:

3.1 GENERAL: 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!

3.2 ASSEMBLING THE FILTER:

The MF90 Filter uses a filter support grid,
filter paper and a hold-down ring to secure
the filter paper in place.

Filter Paper Configuration:

a. Figure 3-1 shows the proper assembly of

these parts:

1. Filter Pan Cover

2. Hold-Down Ring

3. Filter Paper (2 sheets)

4. Screen/Support Grid

5. Filter Pan Assembly

b. First, place the support grid in the bottom

of filter pan.

c. Put two filter paper sheets on top of the

support grid. Be sure the paper covers the
whole filter pan bottom.

DO NOT RUN WATER THROUGH
THE FILTERING SYSTEM. THE
FILTER PUMP IS NOT DESIGNED
TO HANDLE WATER. THIS WILL
VOID THE WARRANTY FOR
THAT SYSTEM, DAMAGE THE
PUMP AND CAUSE ACCIDENTS
IF WATER MIXES WITH HOT
OIL.

2

1

d. Position the hold-down ring on top of the

filter papers and latch the hold-down ring
and filter papers securely against the filter
pan bottom, forming a tight seal.

e. Sprinkle 16 ounces of filter powder on the

top filter sheet. Ensure that the powder
covers the filter paper evenly.

f. Place the crumb catcher screen (if used)

in the filter pan. Allow the crumb catcher
to rest on the top edges of the hold-down
ring.

g. Place filter pan cover onto the filter pan

assembly.

h. Position filter underneath the fryer drain

pipe for gravity drain operations, or
nearby for suction operations.

4

3

5

Figure 3-1

4

5

4. DAILY OPERATIONS:

Arrows show

flow.

Figure 4.1

direction of oil

Fryer Vessel

Drain Valve
with
Extension

Oil
Return
Hose

Quick

Disconnect

Pump

Filter

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. Figure 4-1 shows the general
layout of a generic MF90 Series Portable
Filter System with major components
identified.

4.2 FILTERING TOOLS:

These tools are not required, but are
recommended to make the filtering task
easier.

a. Measuring Cup: Used to measure

sixteen (16) ounces by volume of filter
powder.

b. Apron To protect user from possible

splashing hot oil.

4.3 FILTER PREPARATION:

a. Pull the filter unit close to the fryer.

Remove the filter pan cover.

b. Make certain filter power switches are

in “OFF” position.

c. Plug filter into electrical outlet (if unit

has a heater) and turn on heater switch
to allow pan to preheat.

d. Visually inspect the filter paper.

Scrape debris off the filter paper. If
the filter paper appears scuffed or
darkened, replace the filter paper per
instructions found in Section 4.4 of
this manual.

e. Sprinkle 16 ounces of filter powder on

the top filter sheet. Ensure the top
filter paper sheet is covered evenly.

f. Place filter-pan cover on top of the

filter pan and slide the portable filter
unit under the fryer drain.

c. Gloves: Used to expedite filtering and

prevent burns from splashing oil.