Scotsman DC33 Installation Manual

INTRODUCTION

DC33

The Scotsman DC33 is a restaurant type ice
machine designed for home use. It produces the
same high quality ice as large Scotsman
commercial ice cube machines, and stores that ice
in a heavily insulated storage bin.

This service manual is intended as a resource for
people installing, using, and servicing the DC33.
Because it contains information on safety and
maintenance, Scotsman strongly recommends that
this manual be kept where it is readily available.

Table of Contents

Page

Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation:

Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Add On Kits:

Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Door Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Reverse Door Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Winterizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Cleaning Ice Making System . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Adjust Cube Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Adjust Bin Ice Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Adjust Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Repair:

Curtain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Inlet Water Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Cube Size Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Bin Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Parts lists and wiring diagrams are located in the center of the manual, printed on yellow paper.

July 1994

Page 1

This manual was printed on

recycled paper.

DC33

TECHNICAL INFORMATION

Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of U.L., and C.S.A.
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 any parts and/or 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.

Model
Number

DC33A-1W 115/60/1 15 amp
DC33PA-1W 115/60/1 15 amp

Basic
Electrical

Maximum
Fuse Size

CompressorHPDrain

Pump?

1

⁄

8

1

⁄

8

No
Yes

Add On Kits: Stainless Steel Door Panel Kit is SS33

Warm Air Out

Overhead View of DC33

and RF33 Side By Side

Cool Air In

Serial Number

Tag Location

Drain Pump Kit to convert gravity drain to pump drain is
part number 12-2460-21

Refrigerant Charge is = 5 ounces of R12.

DC33 Cabinet Views

July 1994

Page 2

INSTALLATION

DC33

To properly make and store ice, the DC33 requires
access to air, potable water, 115 volt electricity and
a drain. The machine must be installed indoors, in
a controlled environment.

Air: The ice machine uses a fan to take in room air
at the front of the machine through the right side of
the kick plate. It discharges warm air out the left
side of the kick plate. Anything placed in front of
the kick plate will restrict air flow and cause a
decrease in performance and efficiency. The
minimum air temperature the machine will operate
in is 50

Water Supply: The ice machine requires a
continuous supply of potable water at no less than
20 p.s.i.g. of flowing pressure. Static water
pressure should not exceed 80 p.s.i.g. The
minimum water temperature the machine will
operate in is 40

0

F., and the maximum is 1000 F.

0

F., and the maximum is 1000 F.

Water Quality:

There is no such thing as “pure” water; all water,
including potable water supplied by municipalities,
contains some “impurities”. Water absorbs
impurities from the air as rain and/or as it flows
through the ground. Some of the impurities are
solid particles, these are known as suspended
solids, and a fine particle filter will remove them.
Other impurities are chemically bonded to the
water molecules, and cannot be filtered out, these
are called dissolved solids.

Ice made by the DC33 will have a lower mineral
content than the water it was made from

Purer water will freeze first in the ice making
molds. The reason for this is that anything
dissolved in water lowers the water’s freezing
temperature.

This concentrates most of the impurities in the ice
machine water reservoir where they may form hard
deposits known as scale. The DC33 dilutes the
concentration of minerals by over-filling the
reservoir during the harvest cycle (with the excess
water flowing down the drain). About 3 quarts of
water flow into the unit each cycle. About 1 quart
of that rinses the reservoir and goes down the
drain.

.

To keep the machine operating properly, these
impurities or minerals will have to be regularly
dissolved by an acid cleaning, using Scotsman Ice
Machine Cleaner. Directions for this may be found
in the section under cleaning.

In general, it is always a good idea to filter the
water. A water filter, if it is of the proper type, can
remove taste and odors as well as particles. Some
methods of water treatment for dissolved solids
include reverse osmosis, and polyphosphate
feeders. A reverse osmosis system should include
post treatment to satisfy the R.O. water’s
“aggressiveness”.

Deionized water is not recommended.
Because water softeners exchange one mineral

for another, Scotsman does not recommend their
use for ice machines. Where water is very hard,
softened water may result in white, mushy cubes
that stick together.

Scotsman suggests, that if in doubt about the
water, that a local point of use water specialist be
contacted for recommendations on water
treatment.

Electricity: The machine is supplied with a cord,
and may be plugged into a wall outlet. The ice
machine should be the only device using that
circuit.

The fuse (or circuit breaker) size should be 15
amps.

Drain: There are two DC33 models:
The DC33A-1W is a gravity drain model that

requires a drain tube that’s pitched down from the
outlet at the back of the cabinet to the connection
to the sanitary sewer.

The DC33PA-1W has a built in drain pump that will
pump water up to a drain point, such as a nearby
sink.

Some impurities will inevitably remain, and will
stick to the parts in the machine, and will cause
malformed ice cubes. Eventually, built up mineral

scale can shorten machine life.

July 1994

Page 3

Good Draining

DC33

TO INSTALL: Plumbing

The water supply and drain should be roughed in
and ready at the point of installation. A wall outlet
directly behind the ice machine will make
undercounter installation easier. All electrical,
water and drain connections must conform to local
codes.

Installation Cautions: Although the DC33 has
been designed to be serviced in place, in some
cases it may be necessary to pull the unit out for
service. For that reason do not restrict access to
the cabinet at the front - top and bottom.

Install Unit

Flush With Floor

Installations on a slab: Use a pump
(DC33PA-1A) model and pump the water to the
point of drainage. Pump models will pump 1 story
high.

Installations over a crawl space or basement:

Either gravity drain or pump model units may be
used, if there is not enough room behind the
machine for a drain/waste receptacle, the drain will
have to be below the floor.

ALL PLUMBING MUST MEET LOCAL CODES

Shims

If a floor is to be installed after the ice machine,
shims the thickness of the floor should be installed
under the DC33 to keep the machine level with the
floor. Also, allow 1/8" clearance on each side of the
cabinet.

From Ice Machine

Normal Drain Line, Pitched

Down From Ice Machine

With Trap, Causes Poor Draining

With Trap And Vent,

Draining Is Normal

To Drain

Good Draining

Poor Draining

EXAMPLES OF GRAVITY DRAIN TUBE INSTALLATIONS

July 1994

Page 4

TO INSTALL: Plumbing

DC33

Free Standing Cabinet, Gravity Drain
Model:

All horizontal runs of drain lines must have a 1/4"
per foot fall. An air gap will likely be required
between the ice machine drain tube and the
drain/waste receptacle. A stand pipe with a trap
below it would be acceptable for the drain/waste
receptacle. A floor drain is also acceptable.

FOLLOW ALL LOCAL PLUMBING CODES

Schematic Side

View of Drain

System, Use Began

June 1994

Reservoir

5. Route the drain tube from the back of the
machine to the front and connect to the bin drain
tube. Secure with hose clamps.

On units built after serial number 735675-12Z ­June 1994: When replacing an exisiting gravity
drain unit where a

the hose must be replaced by one which is a

5

⁄8" drain line (hose) was used,

1

⁄2"

I.D. Failure to do this may result in a loose
connection and water leak.

Be certain that the

1

⁄2" I.D. drain hose is pushed up

well past the barbs on the drain fitting. If needed to
ease installation, soak the drain hose in hot water
just before connecting to the fitting.

6. Route a drain line from the ice machine to the
drain/waste receptacle. Note: if using a long
horizontal run (more than 5’) the drain should be
vented at back of cabinet.

7. Turn on the water supply and check for leaks.

8. Replace the kick plate.

9. Level the unit using the leg levelers.

Gravity Drain:

Connect

Drain Hose Here

1

⁄2" I.D.

Poor draining will cause a high
rate of ice melting in the bin.

1. Remove the kick plate.

2. Route the water supply, which
should be a 1/4" O.D. copper tube
through the back of the cabinet to the
front.

3. Install a flare nut and flare the end
of the tube.

4. Flush the water line and fasten the
flare nut to the male flare on the inlet
water valve.

Drain Detail Up To

735675-12Z

(June 1994)

Internal Reservoir Drain Hose

Drain hose was behind the bin

prior to serial number 735675-12Z.

Water Filter

(Recommended)

Shut Off Valve

Floor Drain

Water Inlet

Connection Detail

INSTALLATION OF WATER AND DRAIN

July 1994

Page 5

DC33

TO INSTALL: Plumbing

Free Standing Cabinet, Pump Model:

1. Remove the kickplate and control box cover.

2. Route the water supply, which should be a 1/4"
O.D. copper tube through the back of the cabinet
to the front.

3. Install a flare nut and flare the end of the tube.

4. Flush the water line and fasten the flare nut to
the male flare on the inlet water valve.

5. Locate the coil of plastic tubing shipped in the
storage bin.

6. Connect the coiled tubing to the discharge port
of the drain pump.

7. Route the discharge line from the drain pump to
the drain point connection. Do not connect to a
drain/waste line below a trap. Connect the
discharge line to the drain, per local codes. An air
gap will likely be required between the ice machine
drain tube and the drain/waste receptacle.

8. Turn on the water and plug in the ice machine.
Pour in a couple quarts of water, the drain pump
should start. Check for water leaks.

9. Replace the kickplate and control box cover.

10. Level the unit using the leg levelers.

ALL PLUMBING MUST MEET LOCAL CODES

THE DC33 WILL FIT IN A SPACE

1

15

⁄4" WIDE X 333⁄4" HIGH.

THE DEPTH OF THE CABINET IS 22" TO

THE FRONT EDGE OF THE HANDLE.

Air Gap Device

(Where Required)

Drain

Connection

Water Shut

Off Valve

Water Filter

(Recommended)

WATER AND DRAIN

INSTALLATION

Drain Tube

From Back Of

Machine

July 1994

Page 6

Water Inlet Connection

TO INSTALL: Plumbing

INSTALLATION OF WATER

AND DRAIN

Water Inlet Connection

Detail

DC33

Built In, Gravity Drain Model:

The drain and inlet water tubes must be plumbed
before connecting to the ice machine. All horizontal
runs of drain lines must have a 1/4" per foot fall. An
air gap will likely be required between the ice
machine drain tube and the drain/waste
receptacle. A stand pipe with a trap below it would
be acceptable for the drain/waste receptacle.

Note: Poor draining will cause a high rate of
ice melting in the bin.

Schematic Side View
of Drain System, Use

Began June 1994.

Reservoir

7. Cut off water inlet line at required length.

8. Flush water line. Place flare nut on inlet water
line and flare the end of the copper tube.

9. Attach flare nut to the male flare on the inlet
water valve.

10. Cut off the drain tube to the required length.

11. Connect the drain tube to the drain fitting at the
front of the cabinet. Use hose clamps to secure
tubes to fittings.

On units built after serialn number 735675-12Z ­June 1994: When replacing an exisiting gravity
drain unit where a

the hose must be replaced by one which is a

5

⁄8" drain line (hose) was used,

1

⁄2"

I.D. Failure to do this may result in a loose
connection and water leak.

Be certain that the

1

⁄2" I.D. drain hose is pushed up

well past the barbs on the drain fitting. If needed to
ease installation, soak the drain hose in hot water
just before connecting to the fitting.

12. Turn on the water supply and check for leaks.

Gravity Drain:

Connect

Drain Hose Here

1

⁄2" I.D.

1. Place ice machine in front of
installed location. Adjust leg levelers to
approximately correct position.

2. Remove kickplate.

3. Route water inlet line, which should
be a 1/4" O.D. copper tube, from wall
through ice machine to the front.

4. Route drain line from wall position
through ice machine to the front. Note:
if using a long horizontal run (more
than 5’) the drain should be vented at
back of cabinet.

13. Replace the kickplate.

ALL PLUMBING MUST MEET LOCAL CODES

Water Filter

(Recommended)

Shut Off Valve

5. If electrical outlet for ice machine is
behind the cabinet, plug in the ice
machine now.

6. Push ice
machine into
installed position.

Drain Detail Up

To June 1994

Production

Drain Connection

July 1994

Page 7

DC33

TO INSTALL: Plumbing

Built In Pump Model:

1. Place ice machine in front of installed location.
Adjust leg levelers to approximately correct
position.

2. Remove kickplate and control box cover.

3. Route water inlet line from wall through ice
machine to the front.

4. Locate coil of plastic tubing shipped in ice
storage bin.

5. Connect tubing to discharge port of drain pump
and route drain line from back of cabinet to drain
connection point.

Note: Usually an air gap is required by local codes
between the ice machine drain tube and the drain
receptacle.

6. If electrical outlet for ice machine is behind the
cabinet, plug in the ice machine now.

7. Push ice machine into installed position.

8. Cut off water inlet line at required length.

9. Flush water line. Place flare nut on inlet water
line and flare the end of the copper tube.

10. Attach flare nut to the male flare on the inlet
water valve.

11. Turn on the water supply, and make sure that
the ice machine is plugged in and the power is on.

12. Pour a couple of quarts of water into the
storage bin, the drain pump should start and pump
water out. Check for leaks.

13. Replace kickplate and control box cover.

14. Level the cabinet left to right.

ALL PLUMBING MUST MEET LOCAL CODES

THE DC33 WILL FIT IN A SPACE

1

15

⁄4" WIDE X 333⁄4" HIGH.

THE DEPTH OF THE CABINET IS 22" TO

THE FRONT EDGE OF THE HANDLE.

Drain

Connection

Water Shut Off

Valve

Water Filter

(Recommended)

Air Gap Device

(Where Required)

WATER AND DRAIN

INSTALLATION

Drain Tube From
Back Of Machine

July 1994

Page 8

Water Inlet Connection

TO INSTALL: Add On Kits

Drain Pump Kit

The DC33 is delivered either with or without a
drain pump. Models without a drain pump drain
their water by gravity. However, gravity drain
models may be converted to Pump models thru
the installation of a Drain Pump Kit and Drain
Pump.

Two parts are required for this conversion:

Drain pump kit part number . . . . . . . . . . . . . . . . A36399-020

Drain pump part number . . . . . . . . . . . . . . . . . . 12-2503-21

Specific step-step instructions are included with
the kit.

DC33

Drain Pump

July 1995

Page 9

DC33

TO INSTALL: Add On Kits

Door Kit: The door may be modified to accept a
decorator door panel.

Customizing Door Panel:
A custom door panel may be installed in front of

the standard one. Any panel 14

1

high and

⁄4" thick or less at the edges may be

used as a decorator panel. Examples of decorator
panels include wood to match the adjacent
cabinets; metal of different colors to match nearby
appliances; or just about any material that will fit.
Scotsman has a stainless steel panel available to
fit this machine, the kit number is SS33.

If the material is less than 1/4" thick, the space
between the new panel and the original may be
filled with cardboard.

1. Remove single screw and the left
hand hinge filler plate from the top of the
door.

2. Remove two screws from the top of
the door and lift off the door handle.

3

⁄4" wide, 28 15⁄16"

Custom Panel,

Shown With Filler

Thin Panel

Note: These Two Kits Are Currently

Available to Change Panel Color:

TP33 contains 2 sandalwood panels.

WP33 contains 2 white panels.

Parts Involved in Customizing Door Panel

3. Open the door slightly, about
one-third or so; then, remove the front
screw holding the hinge to the door.

4. Loosen the rear screw of the hinge
just enough to allow the door to sag or
move forward. This will allow access to
the top of the channels at the right and
left edges of the door.

5. From the top of the door, insert the
decorator panel (pre-cut) evenly into the
channels; carefully slide the panel all
the way down until the panel is fully into
the bottom channel.

6. Check that the panel is the in all the
way and does not protrude past the top
edge of the door.

7. Push the top hinge corner of the door
IN to align screw hole in the hinge with
the screw hole in the door. Install the
screw previously removed. Tighten the
other screw.

Hinge

Filler Plate

Hinge

Door

With

Groove

Door Handle

8. Replace the door handle and filler
plate; secure with screws previously
removed.

July 1994

Page 10

AFTER INSTALLATION

Filler Plate

Door Handle

Magnetic

Gasket

Reversing Door Swing:

The hinged side of the door may be reversed to
the other side if desired:

The DC33 was shipped with the door hinged at the
left. The door and hinges are designed for placing
the hinges on either the right or the left side of the
cabinet. Moving the hinges to the right allows the
door to pivot from the right side.

Note: There is a part, packed with the machine,
that is required for this procedure.

DC33

1. Open the door and remove the three
screws holding the lower hinge to the
cabinet.

2. With the door open enough to see both
screws at the top door hinge, remove the two
screws. The door is now free of the cabinet.

3. Remove the single screw and the hinge
filler plate from the top of the door.

4. Install the other filler plate (shipped inside
refrigerator compartment) onto the top corner
of the door where the hinge was.

5. Remove the three plastic plugs from the
top front corner where the hinge will mount.

6. Remove the three plastic plugs from the
lower front corner where that hinge will
mount.

7. Remove the three screws holding the top
hinge to the cabinet. Remove that hinge from
the top and, flipping it upside down, install it
onto the bottom of the door, on the opposite
side using the original screws.

Hinge

8. Remove the hinge assembly from the
bottom of the door, and flip it upside down;
secure it to the cabinet at the opposite side
top position with the original screws.

9. Hold the door up to the cabinet. Secure
the door to the top hinge with the original
screws.

10. Secure the bottom hinge to the cabinet
with the original screws.

11. Place the plastic plugs removed earlier
into the empty holes.

12. Check operation of the door by opening and
closing it.

Hinge

Door

Reverse Hinges From Top to Bottom and

Left to Right to Reverse Door Swing

July 1994

Page 11

DC33

AFTER INSTALLATION - OPERATION

Final Check List

1. Has the machine been properly uncrated, and
have all packing materials and tape been removed
from inside the bin?

2. Have the installation instructions been followed,
including connecting the machine to water, drain
and electricity?

3. Has the machine been leveled?

Initial Start Up

1 Remove control box cover.

2. Rotate timer shaft clockwise until in the harvest
position.

3. Turn on water supply.

4. With unit plugged in, rotate ice machine control
knob to the ON position.

Control

Knob

How To Use:

The ice machine is extremely simple to use, just
turn the ice machine control knob to the on
position. The DC33 will automatically begin to
freeze ice and will continue to do so until the bin is
full.

Use the scoop to remove ice and place the ice
scoop in the holder provided (do not leave the
scoop on the ice, as it will gradually disappear into
the ice).

What to expect from the DC33

The DC33 will release a batch of 8 ice cubes
about every 30 minutes. At the same time the
cubes fall into the storage bin, water will be
entering the ice machine and draining out.

Ice: The ice cubes are tapered cylinders about

1

1

⁄4" in diameter at the widest end; taper down to

1

1" wide at the top; and are 1
machine is adjusted properly, there should be a
indent in the base of the cube. The ice will appear

wet when fresh, this is normal. It may also develop
frost on the outside and look cloudy - this is also
normal (the frost will disappear when liquid is
poured over the ice).

⁄8" high. When the

1

⁄4"

5. Allow the unit to operate for 1 hour, and check
the size of the cubes, if they are not correct, adjust
as recommended on page 17.

6. After the cubes are confirmed to be the correct
size, replace all panels.

7. Locate the nameplate on the control box cover.
Record the serial number and date of start up here
in the service manual. Keep the manual handy for
future reference.

Serial Number:___________________________
Date of initial start up:_____________________

8. Fill out and mail the Warranty Registration and
Customer Audit Report.

Storage: All restaurant type ice machine operate
on this principal: The ice storage bin is not
refrigerated; instead it’s heavily insulated, much
like a picnic cooler or ice chest. If the ice bin were
to be refrigerated, the ice would freeze together
into one very large cluster of ice, and would begin
to evaporate. This would yield ice that is very poor
in quality, and difficult to remove from the machine.

The DC33 will continue to operate until ice builds
up high enough to contact the bin thermostat
sensor tube, then it will shut off. Models with a
drain pump will occasionally pump out melt water
when the machine is off. The pump will only be on
for a few seconds.

Run Time: The amount of time the DC33 will run
to replace melted ice is about 2 hours per day. The
amount of time the ice machine will run to replace
ice removed is dependent upon how much is
removed, how clean the ice machine is, and how
hot the air and water supplied to the machine are.
An empty machine will usually take about 24-36
hours to re-fill.

July 1994

Page 12

OPERATION

DC33

How does the machine make ice?

There are two distinct cycles: freeze and harvest.
1 freeze cycle + 1 harvest cycle = 1 batch of 8

cubes.
The Freeze cycle happens when water is sprayed

against the freezing surface. The Harvest cycle is
when the ice is released and water enters the
machine. A complete cycle takes about 30
minutes.

Freeze: During the freeze cycle the compressor is
pumping refrigerant, the fan motor is blowing air,
and the water pump is circulating water. As the
refrigerated surface absorbs heat from the water
sprayed against it, that heat is moved to the area
where the fan is blowing air. The heat is
transferred to the air, and the warmed up air is
discharged from the ice machine. At the same time
ice is forming on the refrigerated surface (located
at the upper back of the machine). When the
refrigerated surface gets cold enough, the ice
machine’s timer will begin to turn. When it turns far
enough, it will stop the freeze cycle and begin the
harvest.

Harvest: During the harvest cycle the compressor
is still operating, but the spray pump and fan motor
have stopped. Two other components have been
energized; the hot gas valve and the inlet water
valve. These two valves open and warm up the
freezing surface, allowing the cubes to fall into the
bin. The timer is still turning, and when it gets to
the end of the harvest cycle, the freeze cycle will
restart.

How does the machine use water? The ice
machine begins with a fixed charge of water that is
contained in the reservoir. As the water is sprayed
against the freezing surface, the part of water that
does not contain mineral impurities will freeze and
stick to the ice cup molds. The water containing
impurities falls back into the reservoir. Gradually,
during the freezing portion of the ice making cycle,
the water in the reservoir will become highly
concentrated with mineral impurities.

During the harvest cycle fresh water flows into the
machine to dilute the reservoir water and to rinse
the concentrated minerals down the drain.

Schematic Diagram - Shown In

Harvest Cycle

Compressor

Evaporator

Water

Inlet

Cube Molds

Weep

Hole

Spray Jets

Water Tube

Reservoir

Condenser

July 1994

Page 13

Control Knob

DC33

COMPONENT LOCATION

Curtain

Reservoir

Door Gasket

Bin

Thermostat

Bracket

Control Box

Cover

Kickplate

July 1994

Page 14

MAINTENANCE AND CLEANING

Note: To use after winterizing,

reconnect pump hose and water

line. Repeat Initial Start Up (page 12).

DC33

What shouldn’t be done?

Never keep anything in the ice storage bin that is
not ice; objects like wine or beer bottles are not
only unsanitary, but the labels may slip off and
plug up the drain.

Never allow the machine to operate without
regular cleaning. The machine will last longer if it is
kept clean. Regular cleaning should happen at
least once per year, and preferably twice. Some
water conditions will dictate even more frequent
cleaning of the ice making section, and some
carpets or pets will dictate more frequent cleaning
of the condenser.

What should be kept clean?

There are 5 things to keep clean:

1. The outside cabinet & door.

2. The ice storage bin.

3. The condenser.

4. The ice making system.

5. The ice scoop.

How to clean the condenser.

The condenser is like the radiator on a car, it has
fins and tubes that can become clogged. To clean:

1. Remove the kickplate.

2. Locate the condenser surface.

3. Vacuum the surface, removing all dust and lint.
Caution: Do not dent the fins.

Condenser

Surface

4. Replace the kickplate.

Winterizing

1. Clean the machine as explained on the next
page.

How to clean the cabinet.

Wipe off any spills on the surface of the door and
handle as they occur. If anything spilled on the
door or gasket dries onto the surface, wash with
soap and warm water to remove.

How to clean the ice storage bin.

The ice storage bin should be sanitized
occasionally. It is usually convenient to sanitize the
bin after the ice making system has been cleaned,
and the storage bin is empty.
A sanitizing solution can be made of 1 ounce of
household bleach and two gallons of hot (95

0

115

F.) water. Use a clean cloth and wipe the
interior of the ice storage bin with the sanitizing
solution, pour some of the solution down the drain.
Allow to air dry.

0

F. -

2. Turn off the water supply.

3. Drain the water reservoir. See page 24, Spray
Pump Repair and follow the instructions to remove
the pump hose (step 2, bottom hose only).

4. Disconnect the incoming water line at the inlet
water valve.

Inlet Water

Valve

Water Line

5. Remove control box cover and turn the timer
into the harvest cycle.

6. With the machine operating, blow air through
the inlet water valve; a tire pump could do the job.

1

7. Drain pump models should have about
of RV antifreeze (propylene glycol) poured into the
ice storage bin drain.

⁄2 gallon

Note: Automotive antifreeze must NOT be used.

8. Replace control box cover. Switch off and
unplug the machine.

July 1994

Page 15

DC33

CLEANING

How to clean the ice making system.

1. Open the door and
turn the ice machine
control knob to off.

2. Scoop out all of the ice, either discard it or save
it in a ice chest or cooler.

4. Turn the ice machine control to ON.

5. Allow the machine to operate for about 2 hours.

3. Pour 4 ounces of Scotsman Ice Machine
Cleaner (available from a local Scotsman
Distributor or Dealer, ask for part number
19-0343-06 - an 8 ounce bottle) into the ice
machine reservoir.

Scotsman Ice Machine
Cleaner contains
acids. These

compounds may cause
burns.

If swallowed, DO NOT
induce vomiting. Give
large amounts of water
or milk. Call Physician
immediately. In case of
skin contact, flush with
water. Keep out of the

6. Pour hot (95
melt the ice that has formed. That ice will likely be
white and frosty looking.

7. Clean the bin liner of mineral scale by mixing
some ice machine cleaner and hot water, and
using that solution to scrub the scale off of the liner.

8. Rinse the liner with hot water.

9. Sanitize the bin interior.

10. Replace the ice removed in step 2.
The ice scoop should be washed regularly, wash it

just like any other food container.

0

F. - 1150F.) water into the bin to

July 1994

Page 16

ADJUSTMENTS

There are three items that may be adjusted: Cube
Size, Harvest Time, and Bin Level. Note: Cube
Size and Harvest Time adjustments should only be
done by a qualified service person.

Cube size control.

The cube size control should only be adjusted to
bring the cubes to the correct shape, the overall
size cannot be adjusted. Try to adjust the cube
size control when the ice machine is in the harvest
cycle, or in the first 10 minutes of the freeze cycle.

1. Open the door and remove the control box
cover.

2. Locate the cube size adjustment screw, and to
make fuller cubes, turn the screw clockwise about

DC33

SIDE VIEW OF CUBES

TOO

BIG

1/4 turn. This will make the freezing cycle longer.

3. To shorten the freezing cycle and make cubes
that are not as full, turn the adjustment screw 1/4
turn counterclockwise.

4. After the next freezing cycle, the cubes should
have responded to the adjustment, if another
adjustment is required, do it early in the freeze
cycle.

CORRECT

SIZE

CUBE SIZE ADJUSTMENT

TOO

SMALL

July 1994

Page 17

ADJUSTMENT OF THE TIMER

DC33

ADJUSTMENTS

Bin’s ice level.

When the ice machine shuts off the ice level in the
bin should be even with the metal tube inside the
bin. If the ice in the bin is too high or low, turn the
ice machine control knob to adjust the bin
thermostat.

1. To lower the ice level, turn the knob
counterclockwise. Usually a 1/8 turn will be
enough.

2. To increase the ice level, turn the knob
clockwise. Usually a 1/8 turn will be enough.

Timer.

The amount of harvest time may be adjusted. It is
preset from the factory at about 3 minutes, which
should be adequate to release all cubes and fill the
reservoir. If the timer needs to be adjusted:

1. Unplug or disconnect the electrical power.

Electrical Shock Hazard

Disconnect Electrical
Power Before Beginning
Removal of Parts

2. Remove the kickplate.

3. Remove the control box cover.

4. Locate the timer, and loosen the set screw that
holds the two halves of the timer cam together.

Timer Set Screw

5. Rotate one half of the cam to open or close the
lower portion of the cam. More of an opening
equals more harvest time and less of an opening
means less harvest time.

6. Tighten the set-screw.

7. Replace the control box cover and kickplate.

8. Reconnect the electrical power.

July 1994

Page 18

DC33

SERVICE DIAGNOSIS

PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION

The machine does not operate The machine is unplugged Plug the machine in.

Breaker tripped or fuse is blown. Reset breaker/replace fuse - if it

happens again, call for service to
check for a short circuit in the

machine.
Ice machine control turned to OFF. Turn ice machine control to ON.
Bin thermostat open keeping

machine off.

Timer contacts open. Replace timer.

Cubes are too big Cube size control set too cold. Adjust cube size control for a

Cubes are too small Cube size control set too warm. Adjust cube size control for a

Not enough water. Check water supply - filter may be

Cube size control stuck closed ­timer runs all the time.

Cubes are partially formed - have
ragged sides

Machine makes ice, but bin does
not fill up with ice

Cubes are partially formed - are
white at the bottom

Spray jets partially clogged. Clean ice making system with ice

The bin should fill up and the
machine shut off in 24-36 hours. If
not, the condenser may be dirty.

The bin drain may be partially
restricted

The air flow to the ice machine
may be obstructed.

Not enough water in the reservoir. Check water supply - filter may be

Ice on sensor tube - its then

normal for the machine to be off.

Ice machine in a room below 50

degrees - room needs to be

warmer for machine to operate.

Bin thermostat stuck open, needs

to be replaced.

smaller cube.

larger cube.

restricted.

Check inlet water valve - inlet

screen may be restricted.

Replace timer.

machine cleaner.

Clean the condenser.

Clean out the drain, check the

installation.

Check the installation - the

machine must be free of

obstructions at the kick plate.

restricted

Check inlet water valve - inlet

screen may be restricted.

Check for a water leak at the

reservoir.

July 1994

Page 19

DC33

SERVICE DIAGNOSIS

PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION

No ice falling in bin, but machine
operates

Ice may be stuck in the
evaporator and the unit is “frozen
up”.

Too much heat load. Inlet water valve leaks thru, needs

No water spray Water pump does not work,

Cube size control will not close See “Too much heat load” or “not

No airflow Fan motor not turning, needs to

Not enough refrigerant Add low side access valve, locate

Restricted system Add low side access valve,

Hot gas valve leaks thru Add low side access valve,

Compressor will not operate or
pumps poorly.

Check water supply - filter may be

restricted

Check inlet water valve - screen

may be restricted, or valve does

not operate.

Hot gas valve may not operate -

check and repair/replace.

Harvest time set too short - timer

needs adjustment.

to be replaced.

replace it.

Water leak from reservoir, locate

and repair.

enough refrigerant”

Control defective - must be

replaced.

be replaced.

Fan blade broken, needs to be

replaced.

Condenser completely blocked

up, needs cleaning.

leak, recover refrigerant, repair,

replace dryer, evacuate and

weigh in the nameplate charge.

recover refrigerant, replace dryer,

evacuate and weigh in the

nameplate charge.

recover refrigerant, replace hot

gas valve and dryer, evacuate

and weigh in the nameplate

charge.

Start relay or capacitor needs to

be replaced.

Add low side access valve,

recover refrigerant, replace

compressor and dryer, evacuate

and weigh in the nameplate

charge.

July 1994

Page 20

REPAIR

Outlet

Electrical Shock Hazard

Disconnect Electrical
Power Before Beginning
Removal of Parts

DC33

Inlet Water Valve

The inlet water valve may need to be cleaned or
replaced. If there is not enough water coming into
the machine, the valve may need to be cleaned. If
the valve does not work at all, or does not shut off
tightly, it should be replaced.

1. Unplug or disconnect electrical power.

Curtain

The curtain keeps the water that sprayed by the
pump from falling in the bin.

The "sheet" type curtain is replaced by:

1. Removing 4 screws holding the curtain and the
curtain stiffener to reservoir.

2. Pulling the curtain and curtain stiffener out of the
machine.

3. Replace with a new curtain and install as shown.

Sheet Type: Curtain and Curtain

Stiffener MUST Be Installed As Shown

Curtain

Curtain

Stiffener

Bottom

Edge Angle

to Rear

Front Edge

of Reservoir

Curtain

Screw

2. Shut off water supply

3. Remove kickplate

4. Remove the control box cover.

5. Unscrew flare nut from inlet water valve inlet . If
the valve is being replaced, proceed to step 10.

6. Unscrew brass fitting from body of inlet water
valve.

SERVICE OF THE INLET

WATER VALVE

Inlet Water Valve

Screen

Inlet

Check the screen of the valve, it may be clogged
and is restricting the flow of water into the
machine. If that is the problem, clean the screen
and reverse the steps so far to reassemble.

7. Loosen the screws in the back of the control
box, and remove the inlet water valve.

8. Remove the discharge hose from the outlet of
the water valve.

9. Unplug the wire harness from the top of the
valve.

10. Replace with a new valve, and reverse the
above steps to reassemble.

July 1994

Page 21

DC33

REPAIR

Electrical Shock Hazard

Disconnect Electrical
Power Before Beginning
Removal of Parts

Timer

The timer may need to be replaced if it does not
turn, or if it turns and then stops (except at the end
of the harvest cycle - the timer will ALWAYS stop at
the end of the harvest cycle), or if the microswitch
mounted to it does not switch the machine from
the freeze to the harvest and back again.

Caution: The timer is controlled by the cube size
control, and will not turn if the cube size control
does not work.

1. Unplug or disconnect the electrical power to the
ice machine.

2. Remove the kickplate.

3. Remove the control box cover.

4. Remove the screws holding the timer to the
control box.

5. Disconnect the wires at the timer microswitch.

6. Disconnect the wires from the timer motor at the
terminal board.

7. Remove the timer from the ice machine.

8. Reverse the above steps to replace.

July 1994

Page 22

REPAIR

Bin Thermostat

Electrical Shock Hazard

Disconnect Electrical
Power Before Beginning
Removal of Parts

Cube Size Control

The cube size control controls the timer during the
freeze cycle. If the timer will not start, the cube size
control may be the problem. Removal of the cube
size control requires removal of the ice storage bin.

1. Unplug or disconnect the electrical power to the
ice machine.

2. Remove the kickplate.

3. Go thru the steps to remove the ice storage bin.

4. Remove screws holding cube size control body
to control box.

DC33

Bin Thermostat

The bin thermostat is the automatic on-off control
for the ice machine.

1. Unplug or disconnect the electrical power to the
ice machine.

2. Pull the machine out from its installed location.

3. Remove the back panel.

4. Remove the kickplate.

5. Remove the control knob

6.. Remove the control box cover.

7. Remove the screws holding the bin thermostat
to the control box.

Capillary Tube

5. Remove wires connected to the cube size
control.

6. Carefully pull cube size control and attached
capillary tube from the control box, and follow the
capillary tube to the top of the evaporator.

7. The end of the cube size control is inserted into
a socket attached to the evaporator.

8. Remove the cube size control from the socket
and from the ice machine.

CUBE SIZE CONTROL

REPLACEMENT

Socket

Pig Tail

8. Remove the wires attached to the bin
thermostat.

9. Pull the bin thermostat and capillary tube from
the control box, trace the capillary tube to the bin
level control tube and remove the capillary tube
from the tube. Remove the bin thermostat from the
ice machine.

10. Reverse the above steps to replace.

9. Reverse the above steps to replace.

10. Adjust the cube size control per the adjustment
sequence on page 16.

July 1994

Page 23

Pump Suction

DC33

REPAIR

Electrical Shock Hazard

Disconnect Electrical
Power Before Beginning
Removal of Parts

Spray Pump

The water pump that forces the water from the
reservoir through the spray jets.

1. Disconnect electrical power.

2. Open the bin door and locate the three hoses
connected to the water pump.

A. Loosen the hose clamps from the pump hoses.

Spray Jets

Spray Jets are small nozzles that are under the
freezing surface, they spray a narrow pattern of
water at the freezing surface. If plugged or
restricted, poorly shaped ice cubes will form.

If the spray jets are removed the o-rings between
the water inlet tube and the spray jet bases must
be in place (see illustration).

B. Remove the pump hoses from their connections.

3. Disconnect water and drain tubes.

Pump Hose Removal

Spray Pump

(for reference)

Suction

Hose

Reservoir

(for reference)

Hose Clamp

4. Carefully pull machine out from its installed
location to expose the back panel.

5. Remove the back panel.

6. Disconnect wires from the top of the pump
motor.

7. Remove two screws holding pump to bin, and
remove the pump from the ice machine.

8. Reverse the above steps to re-assemble.

Spinner

Jet Base

O-Ring

Pump Discharge

Drain From

Reservoir

Curtain

Curtain Stiffener

Cap

Reservoir

Body

Cube

Chute

O-Ring

Pump

Return

Back View of

Reservoir

July 1994

Page 24