Scotsman MDT3F Installation Manual
MDT3F and MDT4F Manual
MDT3F & MDT4F
Purpose of this manual: To provide detailed
installation and operation instructions; to give
insights into how the machine works; to list
possible causes for problems; and to suggest
procedures for specific types of service.
New Table of Contents
Specifications: ··········································· Page 2
To The Installer: ·········································· Page 3
For The Electrician ········································ Page 4
For The Plumber ········································· Page 5
Wall Mount Kit (KWB4): ······································ Page 6
Final Check List & Initial Start Up ································· Page 7
User Operation ·········································· Page 8
Component Location & Function ································· Page 9
Refrigeration System Operation·································· Page 10
The MDT3F and MDT4F are combination ice
makers and dispensers. The refrigeration system
is air cooled, using R-134a as a refrigerant. The
control system uses electric eyes as a bin control
and a water level sensor as the water safety
control. As ice is made, it fills a plastic storage bin.
When ice is needed, a motor rotates a stainless
steel vane inside the storage bin and sweeps the
ice into the spout.
Water System Operation: ····································· Page 11
Mechanical Operation ······································· Page 12
Electrical Sequence ········································ Page 13
Maintenance: ··········································· Page 14
Dispense Area Sanitation ····································· Page 15
Auger and Bearing Inspection··································· Page 16
Inspection: Top Bearing ······································ Page 17
Inspection:············································· Page 18
Service Diagnosis ········································· Page 19
Service Diagnosis ········································· Page 20
Service Diagnosis: Circuit Board ································· Page 21
Removal and Replacement ···································· Page 22
Water System ··········································· Page 23
Bearings, Water Seal and Auger ································· Page 24
Top Bearing Replacement····································· Page 25
Water Seal & Bottom Bearing Replacement: ··························· Page 26
Refrigeration System ······································· Page 27
Gear Reducer Removal ······································ Page 28
Auger Drive Motor ········································· Page 29
Note this symbol when it appears.
It marks a possible hazard.
April 2010
Page 1
MDT3F & MDT4F
Specifications:
Scotsman ice machines, like the MDT3F or
MDT4F, are designed to be installed indoors, in a
controlled environment. The minimum and
maximum operating conditions are:
Minimum Air Temperature: 50oF.
·
Maximum Air Temperature: 100oF.
·
Minimum Water Temperature: 40oF.
·
Maximum Water Temperature: 100oF.
·
60 Hz voltage may vary between 104 and 126
·
volts.
Water Pressure may vary between 20 and 80
·
psi.
Operating the machine outside these conditions
constitutes misuse and voids the warranty.
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of UL, NSF and CUL.
Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of parts and/of other components not
specifically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.
Specifications:
Model Number Dimensions
W"xD"xH"
MDT4FA-1 14 x 23
MDT4FA-6 14 x 23
MDT3FA-1 14 x 23
MDT3FA-6 14 x 23
7
x 34¼ 115/60/1 14 oz. 15.1 20
8
7
x 34¼ 230/50/1 14 oz. 7.5 15
8
7
x 34¼ 115/60/1 12 oz. 9.4 15
8
7
x 34¼ 230/50/1 12 oz. 5.3 15
8
Basic
Electrical
Refrigerant
Charge
(R134a)
April 2010
Page 2
Min.
Circuit
Ampacity
Max Fuse
Size
To The Installer:
MDT3F & MDT4F
A professional installation of any product is critical
to the long term satisfaction of the user. The ice
maker-dispenser is designed to be installed either
on a counter, or, using a wall hanging kit, hung
from a wall.
Determine the location from the anticipated use
and any options planned for.
This machine is air cooled and blows air out the
lower left side of the cabinet. Do not install the
machine where the side to side air flow might be
blocked.
Cooling Air Flow
Water Quality:
The quality of the water supplied to the machine
will directly affect the purity of the ice and the
reliability of the machine. While the condition of the
water supplied to a building is normally out of the
control of the user, water can be treated at the
point of use.
There are two major types of water impurities:
suspended solids (those that are carried along with
the water and may be filtered out) and dissolved
solids (those that are part of the water and have to
be treated). A water filter is always a good idea,
but does require regular maintenance to change
the cartridge. In some water conditions, water
treatment may be required. Generally this means a
polyphosphate feeder of some kind. Water
softeners are not recommended.
General Installation:
Place the machine in its final location. Remove the
front, top, right and left side panels:
1. Remove two screws at the bottom of the front
panel.
Cooling Air
Flow
Warm Air
Exhaust
The machine will require electrical power, water
and a drain. Follow all local codes. Rough in the
utilities before placing the machine into position
(see For The Electrician and For The Plumber).
2. Disconnect wires at water switch.
3. Remove two screws at the front of the top panel,
then lift the top panel up to remove it.
4. Remove screws from the sides (top and bottom)
of the side panels and from the splash panel.
5. Pull the side panels back and off the machine.
Plumbing connections may be made thru holes in
the back of the cabinet or thru the base.
·
Route the sink drain to the back of the cabinet.
Route the bin drain to the back panel.
·
Route the electrical power cord from the
junction box inside the cabinet. thru the back
panel .
·
Route the inlet water line thru the back panel or
base to the flare fitting inside the cabinet.
After all plumbing and internal wiring has been
done, replace the side and back panels.
Level the unit front to back and left to right.
The machine does not require sealing to the
counter due to the gasket on the base.
April 2010
Page 3
MDT3F & MDT4F
For The Electrician
Electrical connections:
Check the nameplate for voltage and current
requirements. An electrical cord is not supplied.
Connect the MDT3F or MDT4F to a separate
electrical circuit. Wiring to the machine must
conform to all codes. A licensed electrician may be
required in some situations.
Remove the back panel to make the electrical
connection. The electrical connection is made on
the terminal strip in the junction box inside the
machine. Replace the back panel when the
electrical connections are complete.
FOLLOW ALL APPLICABLE LOCAL, STATE
AND NATIONAL CODES
This Unit MUST BE GROUNDED
Electrical
Power
Remove Back Panel To
Expose Junction Box
May 2001
Page 4
For The Plumber
Drains:
The dispenser requires a gravity drain. The pitch
on the drain tubes must be at least ¼ inch fall per
foot of horizontal run. On long horizontal runs, a
vent at the back of the cabinet will improve
draining, and is recommended.
There are two drains to connect: A sink drain, a
ID plastic tube; and the bin drain, a
5
” ID plastic
8
tube. Install rigid tubing between the machine and
the building drain. Route the drains separately to
the building drain.
7
MDT3F & MDT4F
”
8
Water supply:
Connect cold, potable water to the machine. The
inlet water fitting is a 1/4" male flare located on a
wall inside the cabinet.
A hand valve near the
Water Inlet Fitting - 1/4"
location is
recommended. A water
filter is also a good
idea.
Follow all local codes.
Strainer or
Filter
FOLLOW ALL APPLICABLE LOCAL, STATE
AND NATIONAL CODES
Male Flare
(Inside Cabinet)
Water Supply
Bin and Reservoir
Overflow Drains
Sink Drain
Building Drain
(Typical)
May 2006
Page 5
MDT3F & MDT4F
Wall Mount Kit (KWB4):
Contents:
1. Top Case Hanger Bracket: Attaches to the frame
of the dispenser.
2. Top Wall Bracket: Mounts to the wall and
engages the top case hanger bracket to support
the dispenser.
3. Bottom Wall Bracket: Mounts to the wall and
spaces the base of the dispenser away from the
wall.
4. Bottom Fittings Cover: Fastened to the bottom
wall bracket to hide the utility connections.
5. Junction box cover.
1
2
5
Top Wall Bracket:
1. Hold the bracket on the wall where it will be
mounted.
2. Mark on the wall the positions of the holes in the
bracket.
3. If needed, drill pilot holes for the fasteners.
4. Secure the bracket to the wall with fasteners of
sufficient strength to hold up the dispenser.
Connect all internal utilities. Route tubes and
wires out the bottom.
Junction box cover. Install on the junction box.
Bottom Wall Bracket:
1. Lift up and hang the dispenser from the top wall
bracket.
2. Position the bottom wall bracket so that the
molding on the dispenser base bottoms in the
channel of the wall bracket.
3. Secure the bracket to the wall.
Bottom Fitting Cover:
1. Connect electrical power, water inlet, bin drain
and sink drain of the dispenser thru the bottom of
the case.
4
Installation: Check building wall for the strength
required to support a machine of this weight and
size. Note that if at least 6" of space is not left
above the machine, cleaning and most service of
the machine will require removal of the machine
from the wall mounts. All utilities are to be routed
thru the base. The back panel is not used when
the machine is hung from the wall.
Top Case Hanger Bracket
1. Remove back panel.
2. Place top hanger bracket on the inside of the
frame and position it in line with the pre-punched
holes in the frame.
3. Fasten the bracket to the frame with four¼-20
screws from the kit.
2. Secure bottom fitting cover to the bottom wall
bracket with the four sheet metal screws provided
3
in this kit.
Bottom
Cover
Secure With
Screws
Top Case
Bracket
Wall
Brackets
May 2001
Page 6
Final Check List & Initial Start Up
MDT3F & MDT4F
1. Is the machine located indoors where the
temperature limitations are not exceeded?
2. Is there at least 6" clearance on both sides of
the cabinet for adequate air flow?
3. Is the water supply adequate, and has a shut off
valve been installed?
4. Is the cabinet level?
5. Have all of the electrical and drain connections
been made?
Initial Start Up
1. Remove 2 screws at the bottom of the front
panel and remove the front panel.
2. Remove screws and the top panel.
3. Open the water supply shut off valve.
4. Watch the water fill the reservoir. Check that it
flows in and fills the reservoir near to the mark
molded into the side of the reservoir. Check that
the float shuts off the water flow when the tank is
full. Check for leaks. Tighten hose clamps as
needed.
5. Plug the unit in or switch on the electrical power.
After about 15 seconds the machine should start.
6. Let the machine operate, listen for any unusual
noises. If needed, reposition tubing & panels to
eliminate vibration.
After the unit has been operating for about 10
minutes, there should be enough ice in the bin to
test the dispense system.
7. Using a container, place in in front of the glass
sensor and below the ice chute. See that ice is
dispensed (the bin drive motor continues to run as
long as the container is in place).
8. Move the water switch (rocker switch on the
front panel) to ON. Place the container in front of
the glass sensor and under the ice chute. Both
water and ice should be dispensed.
9. Pour water into the sink and check that the drain
does not leak but drains the water rapidly.
10. Explain to the user the maintenance
requirements and operation of the machine.
11. Fill out the Warranty Registration and
Customer Evaluation form. Mail it to Scotsman.
12. Leave the service manual with the owner/user
and explain who should be called if service is
needed.
April 2010
Page 7
MDT3F & MDT4F
User Operation
The MDT3F and the MDT4F are automatic ice
vending machines. All either requires is cool air,
clean water and an adequate supply of electrical
power.
To Vend Ice:
Place a container in front of the Touch Free sensor
and below the ice spout. Hold it there until the
container is full of ice. Do NOT overfill the
container or a build up of ice in the sink or a back
up of ice in the spout will occur.
To Vend Ice and Water.
Switch the Water Switch to ON. Place a container
in front of the Touch Free sensor and below the ice
spout. Water and ice will be dispensed into the
container below the spout. Note: The water is NOT
cooled, it is the same temperature as the building
supply water.
Daily Maintenance: Pour hot water into the sink to
flush out any debris or build up. Wipe the cabinet
off, wash the sink and grill to keep minerals from
accumulating.
Caution:
Unless the touch free sensor is
de-activated by pushing the
Cleaning Switch in, ice and/or water
may be dispensed during cleaning.
The Cleaning Switch is a button,
located to the left of the ice chute,
that temporarily shuts off the sensor
for cleanup of the splash panel.
Pushing the button in will disable the
sensor for 2 minutes, pushing the
button in again will return the sensor
to normal operation.
Water
Switch
Glass
Sensor
Touch Free
Disable
Switch
May 2001
Page 8
Component Location & Function
Evaporator. This is a vertical cylinder full of water
and refrigerated. Also in the cylinder is a slowly
rotating auger. The auger forces the ice up the
evaporator walls and compresses it at the top. The
resulting flaked ice then falls by gravity into the ice
storage bin.
Water Reservoir. The water reservoir contains the
inlet float valve and the water level sensor. The
float valve controls the flow of water into the
reservoir, and the water level sensor will stop the
ice maker if the water supply fails.
Ice Storage Bin. The ice storage bin is an
insulated plastic container that is open at the top
and has a spout at the bottom. There is a rotating
ice vane inside the bin that causes the ice to be
swept over the spout and dispensed. The vane is
rotated by a gear motor at the top of the bin.
MDT3F & MDT4F
Bin Cover. The bin cover not only keeps dirt from
the ice storage bin, it also is the support for the
dispense gear reducer and the location of the
electric eye bin controls.
Condenser. The machine uses
an air cooled condenser. It blows
air out, away from the fan motor.
The heat removed from the water
is exhausted from the condenser.
Compressor. The refrigeration
system compressor provides the
force to move the refrigerant
around the system.
Auger Drive. The auger drive is
a direct drive gear reducer.
Compressor
Auger Drive
Water Reservoir
Evaporator
Bin Cover
Condenser
Ice Storage
Bin
May 2001
Page 9
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