Scotsman CU50GA1 Installation Manual
Installation and
User’s Manual for
Cube Ice Machine
Model CU50
Introduction:
This ice machine is the result of Scotsman’s
decades of experience as an industry leader in the
design and manufacture of both commercial and
residential ice machines.
Table of Contents
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Cabinet Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Air ow & Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Water Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Door swing change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Notes for the Installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Installation: Water & Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Gravity Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
This manual includes the information needed to
install, start up and maintain the ice machine. Note
any Caution or Warning indicators, as they provide
notice of potential hazards. Keep this manual for
future reference.
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
How to clean the condenser and winterize . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
Clean and Sanitize Ice Making System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
What to do before calling for service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
Outdoor Use Notice:
Keep from freezing. Severe damage will occur to the unit if left in or operated in temperatures beyond
the limits listed in this manual. That damage is NOT covered by warranty.
Keep dry. Do not locate in low lying areas where puddles will accumulate.
Provide Shade: Heat gain from the sun will reduce the unit’s ability to make and store ice, and
ultraviolet radiation from the sun can potentially damage the unit’s plastic components.
Water Supply: Avoid a long run of hose or tubing exposed to the sun. Plastic water supply tubing
should be rated for potable water and include UV protection. Copper tubing is recommended.
Back Flow Prevention: The unit includes back ow prevention, no additional check valve is required.
Drainage: Do Not drain into swimming pool or onto grounds.
Operation: It is normal for the ice level in the storage bin to be low when unit is used in temperatures
below 65 degrees F.
March 2010
Page 1
Specications
CU50
Installation and User’s Manual
This ice machine is designed to be used indoors,
in a controlled environment, and under limited
conditions (see page 1), outdoors. It can be used
in a wide variety of environmental conditions, but
there are limits. Use outside of the listed limitations
is misuse and will void the warranty.
Air temperature limits:
The ice machine will operate adequately within the
limits, but functions best in temperatures between
70 and 80 degrees F.
• Minimum – 50 degrees F. (10ºC)
• Maximum – 100 degrees F. (38ºC)
Water temperature limits:
• Minimum – 40 degrees F. (4.5ºC)
• Maximum – 100 degrees F. (38ºC)
Water pressure limits:
• Minimum – 20 psi (1.4 bar)
• Maximum – 80 psi (5.5 bar)
Because the ice machine is making a food product,
the water supply to the ice machine must be
potable, or t for human consumption.
Electrical voltage limits:
• Minimum – 104 volts
• Maximum – 126 volts
Models
• CU50GA-1A - gravity drain
• CU50PA-1A - pump drain
Options:
Kickplate Extension: In some situations the leg
levelers will be extended enough to become
visible. A kit to extend the kickplate over the legs is
KKPF.
Cabinet Stability: In some free standing
installations it may be prudent to add a bracket that
secures the back of the cabinet to a wall. That kit
number is KATB.
Drain Conversion: A gravity drain model can be
converted to a drain pump model by installing a
drain pump kit. The drain pump kit consists of a
drain pump, wiring harness and associated tubing.
The part number is A39462-021.
Warranty Information
Other:
Indoor use and kickplate: You may remove the
stainless steel kickplate cover from the unit when
installed indoors. Leave the plastic kickplate on the
unit.
Note:The stainless steel kickplate cover must
remain on the unit when the unit is installed
outdoors.
Cabinet Dimensions
Width Depth, with door panel, handle adds 1 5/8” Height
14 7/8” 22 3/4” 33 3/8” to 34 3/8”
August 2014
Warranty information is supplied separately from
this manual. Refer to it for coverage. In general,
the warranty covers defects in materials or
workmanship and does not cover corrections of
installation errors or maintenance.
Service
This is a commercial product. If service is needed
on a unit in a residence, use a commercial service
company. Locate one at www.scotsman-ice.com.
Page 2
Cabinet Layout
98.55
FLOOR DRAIN
443.23
17.45
3.88
377.95
14.88
ACCESS HOLE
753.24
29.66
40.51
1.60
606.68
23.89
566.17
22.29
873.25
34.38
DRAIN
FLEXIBLE TUBING
3/8 I.D. PUMP MODEL (INCLUDED)
5/8 I.D. GRAVITY MODEL (NOT INCLUDED)
AIR OUT
AIR IN
97.79
3.85
81.28
3.20
LEG
ADJUSTMENT
[25.40]
1.00
March 2010
Page 3
115 V
POWER CORD
62.04
2.44
188.98
7.44
97.16
3.83
POTABLE WATER INLET
1/4" COMPRESSION FITTING
82.99
3.27
39.75
1.57
Air ow & Control Panel
CU50
Installation and User’s Manual
The machine takes in room temperature air at the
lower right front and forces warm air out the lower
left front. Restricting the airow will adversely affect
the ability of the ice machine to make ice.
Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of agencies like U.L.
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
specically approved by Scotsman.
Scotsman reserves the right to make design
changes and/or improvements at any time.
Specications and designs are subject to change
without notice.
Air Out
Ice Making
Indicator Light
On - Off
Button
Air In
Clean Unit
Indicator Light
Control Panel
March 2010
Time To
Page 4
Location of Dataplate
Check Water
Indicator Light
Clean - Reset
Button
CU50
Installation and User’s Manual
Water Quality
All water, including potable water supplied by
municipalities, contains some impurities or minerals.
Water absorbs impurities from the air as rain and/
or as it ows through the ground. Some of the
impurities are solid particles, these are known
as suspended solids, and a ne particle lter will
remove them. Other impurities are chemically
bonded to the water molecules, and cannot be
ltered out, these are called dissolved solids.
Ice made by this machine will have a lower mineral
content than the water it was made from. This is
due to the method of making ice, as water with
few or no mineral content will freeze rst in the
ice making molds. The reason for this is that the
minerals dissolved in water lowers the water’s
freezing temperature so the purer water freezes
rst. This concentrates most of the impurities in
the ice machine water reservoir where they may
form hard deposits known as scale. The machine
automatically dilutes the concentration of minerals
by over-lling the reservoir during the harvest cycle
(with the excess water owing down the drain).
Between 2 and 4 pints of water ow into the unit
each cycle. Between 1 and 3.5 pints of that rinses
the reservoir and goes down the drain.
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.
Filters and Treatment
In general, it is always a good idea to lter the
water. A water lter, 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.
RO Water
This machine can be supplied with Reverse
Osmosis water, but the water conductivity must
be no less than 10 microSiemens/cm. A reverse
osmosis system should include post treatment to
satisfy the R.O. water’s potential aggressiveness.
Deionized water is not recommended.
Because water softeners exchange one mineral
for another, softened water may not improve water
conditions when used with ice machines. Where
water is very hard, softened water could result in
white, mushy cubes that stick together.
If in doubt about the water, contact a local point of
use water specialist for recommendations on water
treatment.
Installation Overview
The ice machine must:
To keep the machine operating properly, these
impurities or minerals will have to be regularly
dissolved by an acid cleaning, using Scotsman Ice
Machine Scale Remover. Directions for this may be
found in the section under cleaning.
July 2018
Page 5
• be connected to cold, potable water
• be connected to a drain
• be connected to the proper power supply
• be able circulate air through the vents at the
front.
Note: Do not build in so that the door is recessed.
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