Master Bilt DD Series User manual

5/21 Rev. E 143568
Installation and Operations Manual
For
R290
ICE CREAM DIPPING-DISPLAY MERCHANDISERS
DD-xx – Standard Models
DD-xxL – Low Glass Models
DD-xxLCG – Low Curved Glass Models

25/21 Rev. E 143568
TABLE OF CONTENTS
INTRODUCTION........................................................................................................................................................ 3
STORE CONDITIONS…………………………….……………….…..…………………………………………….. .......... 3
WARNING LABELS AND SAFETY INSTRUCTIONS .............................................................................................. 4
PRE-INSTALLATION INSTRUCTIONS .................................................................................................................... 5
Inspection for Shipping Damage ........................................................................................................................... 5
INSTALLATION INSTRUCTIONS………………………………………………………………………………….. .......... 6
General Instructions ............................................................................................................................................. .6
Electrical................................................................................................................................................................ 6
Mechanical ............................................................................................................................................................ 7
Startup.................................................................................................................................................................. 7
TEMPERATURE CONTROL ..................................................................................................................................8-9
CLEANING INSTRUCTIONS .................................................................................................................................. 10
Can Holder Cleaning........................................................................................................................................... 11
Frost Shield Cleaning.......................................................................................................................................... 11
Lid Locking Kit..................................................................................................................................................... 12
OPERATION CONDITIONS AND PRESSURES ................................................................................................... 13
SERVICE INSTRUCTIONS (Trouble Shooting Guide .......................................................................................... 13
CONTROLLER SENSER PROBE LOCATION....................................................................................................... 14
AIR FILTER CLEANING INSTRUCTION ................................................................................................................ 15
DIPPING-DISPLAY CABINET PART NUMBERS .................................................................................................. 16
OPTIONS ................................................................................................................................................................. 17
SALE AND DISPOSAL............................................................................................................................................ 17
WIRING DIAGRAMS ..........................................................................................................................................18-19

35/21 Rev. E 143568
INTRODUCTION
This manual contains important instructions for installing, using and servicing the Ice Cream Dipping-Display
case. A part list is included in this manual. Read all these documents carefully before installing or servicing your
equipment.
CAUTION
This unit uses a flammable refrigerant. Use care when handling and operating to avoid damaging the
refrigerant tubing or increasing the risk of a leak.
All service should be performed by factory authorized personnel. All component parts shall be replaced with
like components to minimize the risk of possible ignition due to incorrect parts or improper service.
STORE CONDITIONS
The cases are designed to operate in the controlled environment of an air-conditioned store. The store temperature
should be at or below 75°F and a relative humidity of 55% or less. At higher temperature or humidity conditions, the
performance of these cases may be affected and the capacity diminished. It is not uncommon in a newly
constructed store for the temperature and humidity to be above design conditions. These excessive conditions may
produce sweating in the case until the store is operational and the ambient environment is more desirable.
These cases should not be positioned where it is directly exposed to rays of sun or near a direct source of radiant
heat or airflow. This will adversely affect the case and will result in poor performance.
NOTICE
Read this manual before installing your cabinet. Keep the manual and refer to it before doing any service
on the equipment. Failure to do so could result in personal injury or damage to the cabinet.
DANGER
Improper or faulty hook-up of electrical components of the refrigeration units can result in severe injury or
death.
NEVER use an extension cord to power this unit. All electrical wiring hook-ups must be done in accordance
with all applicable local, regional or national standards.
NOTICE
Installation and service of the refrigeration and electrical components of the cabinet must be performed by
a refrigeration mechanic and/or a licensed electrician
The portions of this manual covering refrigeration and electrical components contain technical instructions intended
only for persons qualified to perform refrigeration and electrical work.
This manual cannot cover every installation, use or service situation. If you need additional information have the
serial number at hand and call or write us:
Refrigerated Solutions Group
891 County Road U
Hudson, WI 54016
800-388-5253

45/21 Rev. E 143568
WARNING LABELS AND SAFETY INSTRUCTIONS
This symbol is used to alert user that there is risk of fire or explosion since flammable refrigerant is
used. This symbol can be observed on back or sides of cabinet.
This symbol is the safety-alert symbol. When you see this symbol on your cabinet or in this
manual, be alert to the potential for personal injury or damage to your equipment.
Be sure you understand all safety messages and always follow recommended precautions and safe operating
practices.
NOTICE TO EMPLOYERS
You must make sure that everyone who installs, uses or services your cabinet is thoroughly familiar with
all safety information and procedures.
Important safety information is presented in this section and throughout this section and throughout the manual.
The following signal words are used in the warnings and safety messages:
DANGER: Severe injury or death will occur if you ignore the message.
WARNING: Severe injury or death can occur if you ignore the message.
CAUTION: Minor injury or damage to your cabinet can occur if you ignore the message.
NOTICE: This is important installation, operation or service information. If you ignore the
message, you may damage your cabinet.
The warning and safety labels shown throughout this manual are placed on your cabinet at the factory.
Follow all warning label instructions. If any warning or safety labels become lost or damaged, call your
customer service department at 800-388-5253 for replacements.
This label is located on top of the electrical control This label is attached to the cabinet power cord
label and on the wiring channel. on models with a power cord.
CAUTION!
GROUND REQUIRED
FOR SAFE OPERATION

55/21 Rev. E 143568
PRE-INSTALLATION INSTRUCTIONS
INSPECTION FOR SHIPPING DAMAGE
You are responsible for filing all freight claims with the delivering truck line. Inspect all cartons and crates for
damage as soon as they arrive. If damage is noted to shipping crates or cartons or if a shortage is found, note this
on the bill of landing (all copies) prior to signing.
If damage is discovered when the cabinet is uncrated, immediately call the delivering truck line and follow up the
call with a written report indicating concealed damage to your shipment. Ask for an immediate inspection of your
concealed damage item. Crating material must be retained to show the inspector from the truck line.

65/21 Rev. E 143568
INSTALLATION INSTRUCTIONS
GENERAL INSTRUCTIONS
1. Be sure the equipment is properly installed by competent service people.
2. Keep the equipment clean and sanitary so it will meet your local sanitation codes.
3. Rotate your stock so that older stock does not accumulate. This is especially important for ice
cream. A "First-In, First-Out" rotation practice will keep the products in good salable condition.
4. Do not place product in the case when it is soft or partially thawed. Also, product should not be put in the case
for at least 6 hours after it is started.
5. Stock cases as quickly as possible, exposing only small quantities to store temperatures for short periods of
time.
6. When replacing burned out LED, be sure that the electrical power to the lighting circuit is turned off.
NOTICE TO STORE OWNERS / MANAGERS
Moisture or liquid around or under the cabinet is a potential slip/fall hazard for persons walking by or
working in the general area of the cabinet. Any cabinet malfunction or housekeeping problem that creates a
slip/fall hazard around or under the cabinet should be corrected immediately.
If moisture or liquid is observed around or under a cabinet, an immediate investigation should be made by qualified
personnel to determine the source of the moisture or liquid. The investigation should determine if the cabinet is
malfunctioning or if there is a drainpipe leaking.
ELECTRICAL
WARNING
Before servicing electrical components in the case, make sure all power to case is off. Always use a
qualified technician.
NOTICE
For replacement ballast, use only ballast that complies with UL and recommended in part list.

75/21 Rev. E 143568
MECHANICAL
Remove grille and check refrigeration lines to see that they are free (not touching each other or
compressor). Spin condenser fan blade to see that it is free.
Check that all service valves are open.The picture below is standard DD series condensing unit. The compressor is
hermetic, it is internally spring mounted and ready to run.
Hermetic Compressors, Jelly Roll & fin and tube condenser
Remove cabinet from crate base and slide into location. Cabinet must be level from side to side and front to back.
To comply with Sanitation requirements the cabinet must be mounted on legs (6” high min.) or casters or the base
must be sealed to the floor with an N.S.F. listed silicone sealant.
STARTUP
Uncoil the lead cord and pass it through the hole provided in the grille. While the cabinet is in operation, check the
voltage draw and the amperage draw versus this rating on the nameplate. Voltage should be checked at the
compressor terminals while the compressor is initially starting. The unit is designed to operate at +/- 10% of 115
volts, 60 cycle, single phase. This means that the voltage should be between 103 and 126.5 volts.
After the cabinet has pulled down in temperature to approximately 0°F at load line, check the thermostatic control
by turning it to its warmest position. This should shut the compressor off. A separate 20 amp. fuse circuit for each
cabinet is recommended to avoid the possibility of other appliances on a circuit from overloading and causing a
malfunction. Make sure that the electrical service is grounded upon installation.

85/21 Rev. E 143568
TEMPERATURE CONTROL
The dipping-display cabinet has a temperature control that is adjustable from #1 (warmest setting) to # 9 (coldest
setting). Turn the control knob in line with the punch mark to the desired setting. The temperature control is located
near the condensing unit at the front of the cabinet.
WARMEST SETTING
Punch Mark

95/21 Rev. E 143568
COLDEST SETTING
Punch Mark

10 5/21 Rev. E 143568
CLEANING INSTRUCTIONS
WARNING: DO NOT REMOVE FROST WITH A KNIFE, PICK, OR SHARP OBJECTS. DO NOT USE
ABRASIVE CLEANERS OR CAUSTIC CLEANERS OR SCOURING PADS
Every 30 to 60 days (depending on frost accumulation), the cabinet should be emptied, warmed up, and wiped
down using a solution of 1 teaspoon of baking soda with 1 quart of water. This solution will help eliminate odors. Do
not use strong soaps or detergents as they leave odors that can contaminate your product. Cabinets are equipped
with a floor drain that exits out the lower rear. This exit has a convenient garden hose fitting.
If it is not convenient to turn the cabinet power off, lay a piece of plastic sheeting on the floor of the cabinet and
scrape the frost off walls using a plastic scraper. Do not use metal scrapers. This will damage the interior paint of
the cabinet.
Lid Removal and Cleaning
The lid can be removed by lifting up and out (see picture). The lid is a high-impact plastic. Wash with warm soapy
water or non-abrasive detergent to avoid scratching.

11 5/21 Rev. E 143568
Can Holder Assembly Removal And Cleaning (Optional)
Remove plastic can clamp by screwing knob off the threaded shaft. Wash the can holder and can clamp with a non-
abrasive detergent to maintain sanitary gloss. Remove the shaft by loosening the wing nut and unscrewing the shaft
from the shelf. Wash the shaft and shelf using a non-metallic brush.
Frost Shield Removal and Cleaning (optional)
When the frost-shields accumulate approximately ½ to 1 inch of frost (about two to three days), remove it by lifting
up to disengage from the keyhole slot. Remove the frost by holding under running water until clean. Dry and replace
the frost-shield by engaging screws at the big end of the keyhole and push down.

12 5/21 Rev. E 143568
Lid Locking Kit Installation (Optional)
A simple and easy to install Lid locking kit option is avaialble to restrian from unwanted access to the ice cream
stored inside the dipping cabinets.When the option is opted, please follow the below instruction to lock the lid. One
kit is needed for each Lid to be locked.
* For disassemble of the Lid Locking Kit, please follow the process in reverse.

13 5/21 Rev. E 143568
OPERATION CONDITIONS AND PRESSURES
With room ambient temperature of +75 oF and cold cabinet (unit cycling on control):
DD-66 & DD-88 with R-290
Suction pressure – 2 to 4 psig.
Head pressure – 130 to 160 psig.
DD-26 & DD-46 with R-290
Suctions pressure 1 to 5 psig
Head pressure 130 to 160 psig
SERVICE INSTRUCTIONS (Trouble Shooting Guide)
1. High head pressure and high back
pressure:
A. Condenser coil clogged or
restricted.
B. Condenser fan motor defective.
C. Air in the system.
D. Refrigeration overcharge.
2. Low back pressure and low head pressure:
A. Capillary tube restriction.
B. Refrigerant undercharged.
C. Leak in system.
D. Moisture in system.
3. Pressures normal – cabinet warm:
A. Refrigerant undercharged.
B. Thermostat set too warm.
4. Compressor starts and runs – but cycles
on overload:
A. Low voltage.
B. Overload protector defective.
C. High head pressure (see#1).
5. Compressor will not start – hums, but
cycles on overload:
A. Low voltage.
B. Relay defective.
C. Overload defective.
D. High head pressure (see #1).
6. Cabinet sweating:
A. High ambient humidity.
7. Special service situations

5/21 Rev. E 14356814
CONTROLLER SENSOR PROBE LOCATION
In DD-46,DD-66 & DD-88 models, the bulbwell is a straight 3/8” copper tube placed 3” below the dog house as
shown below. For the DD-26 model the bulb well is inverted “L” shape as as shown in the picture. Please make
sure the bulb well opening is properly insulated with permagum. While replacing the sensor probe please make
sure the probe is inserted to the end of the bulb well till it stops. Special care needs to be take during iserting the
probe inside the bulb well so that it is will not be damaged. The sensor probe is color coded as shown below.
Make sure the probe is fully inserted into the bulb well till the mark up.
Bulbwell location with sensor probe
(representation only)
Sensor probe with bulbwell foamed
Bulbwell in DD-26
Bulbwell location in DD-46, DD-66
& DD-88
Red: DD-26
Green: DD-46
Yellow: DD-66
Blue: DD-88

5/21 Rev. E 14356815
AIR FILTER CLEANING INSTRUCTIONS
(Air Filter for DD-66 & DD-88 Fin & Tube Condenser)
The condenser for DD-66 & DD-88 is a 5mm fin and tube condenser. A special removable and reuasable air filter
has been provided to protect the condenser and avoid it to be blocked by dust. The filter needs to be removed and
cleaned periodically for optimum performance of the unit. Find below the pictorial presentation of filter removal and
reinstallation after cleaning.
Draining system
The drain outlet is as shown below in the picture.

5/21 Rev. E 14356816
If moisture or liquid is observed around or under a cabinet, an immediate investigation should be made by qualified
personnel to determine the source of moisture or liquid. The investigation made should determine if the cabinet is
malfunctioning or if there is a simple housekeeping problem.
Moisture or liquid around or under a cabinet is a potential slip/fall hazard for persons walking by or working
in the general area of the cabinet.
Any cabinet malfunction or housekeeping problem that creates a slip/fall hazard around or under a cabinet
should be corrected immediately
DIPPING-DISPLAY CABINET PART NUMBERS
Please use the part numbers below when ordering replacement parts for your DD Series Standard, Low Glass
and Low Curved Glass Models.
Description
DD-26(L)(LCG)
DD-46(L)(LCG)
DD-66(L)(LCG)
DD-88(L)(LCG)
LED Driver
23-01878
23-01878
23-01878
23-01878
LED
23-01947
23-01945
23-01947(2 REQ)
23-01950(2 REQ)
Jumper
23-01951
23-01951
Bracket/Attachment
23-01948
23-01948
23-01948
23-01948
Capillary Tube
11-01306
11-01306
11-01306 (2 REQ)
11-01306 (2 REQ)
Compressor
03-50992
03-50992
03-50996
03-50996
Condenser Coil
07-14190
07-14190
07-14186
07-14186
Condenser Fan Blade
15-13093
15-13093
Condenser Fan Motor
13-00311
13-00311
13-13453
13-13453
Condenser Fan Motor
Bracket
13-00754 13-00754
Compressor grommet
03-50994
03-50994
03-50994
03-50994
Drier
09-09864
09-09864
09-09864
09-09864
Controller
19-14239
19-14239
19-14239
19-14239
Controller Sensor
19-14785
19-14785
19-14785
19-14785
Top Gasket
(37-01544)(37-
01536)
(37-01545)(37-
01537)
(37-01546)(37-
01538)
(37-01547)(37-
01539)
FRONT GLASS
(Straight Glass Model)
(Low Glass Model)
(Low Curved Glass)
31-03991
31-03976
31-04011
31-03992
31-03977
31-04012
31-03993
31-03978
31-04013
31-03994
31-03979
31-04014
SIDE GLASS
(Straight Glass Model)
(Low Glass Model)
(Low Curved Glass)
31-03995
31-03480
31-04015
31-03995
31-03480
31-04015
31-03995
31-03480
31-04015
31-03995
31-03480
31-04015
Lid Assembly
394-145A
395-145A
396-145A
397-145A
Light Switch
19-14810
19-14810
19-14810
19-14810
Shelf, Wire
33-01879
33-01879
33-01879
33-01879
Recess Bumper
29-01691
29-01691
29-01691
29-01691
Wire Harness (126”
Power Cord)
21-01741 21-01741 21-01741 21-01741
Condenser Air Filter
44-01140
44-01140
Distributor
11-02006
11-02006

5/21 Rev. E 14356817
OPTIONS
Description
DD-26(L/LCG)
DD-46(L/LCG)
DD-66(L/LCG)
DD-88(L/LCG)
Can Holders –
Includes
White Can Covers
A394-20301 A395-20301 A396-20301 A397-20301
Can Covers
Clear
White
44-00984
44-01084
44-00984
44-01084
44-00984
44-01084
44-00984
44-01084
Lid Locking Kit
A390-11129
A390-11129
A390-11129
(2 QTY)
A390-11129
(2 QTY)
Casters
Set (4 or 6), 3” Dia.
A059-11340
A059-11340
A060-11340
A060-11340
Dipper Well
w/Installation Kit
A060-20400 A060-20400 A060-20400 A060-20400
Frost Shields
(Patented)
A390-11150 (DD-26),
A394-11150 (DD-26L
& DD-26LCG)
A391-11150 (DD-46),
A395-11150 (DD-46L &
DD-46LCG)
A392-11150 (DD-66),
A396-11150 (DD-66L
& DD-66LCG)
A393-11150 (DD-88),
A397-11150 (DD-88L
& DD-88LCG)
Legs
6” leg kit
A062-11270 A062-11270 A061-11270 A061-11270
Flavor Tags
A062-20225
(DD-26 only)
A062-20225
(DD-46 only)
A062-20225
(DD-66 only)
A062-20225
(DD-88 only)
SALE AND DISPOSAL
If you sell or give away your cabinet you must make sure that all safety labels and the Installation - Service Manual
are included with it. If you need replacement labels or manuals, we will provide them free. Contact our customer
service department at 800-388-5253.
The customer service department should be contacted at the time of sale or disposal of your cabinet so records
may be kept of its new location.
If you sell or give away your cabinet and you evacuate the refrigerant charge before shipment, we recommend that
the refrigerant charge should be properly recovered in compliance with section 608 of the Clean Air Act effective
November 1995 and in accordance with all applicable local, regional, or national standards.

5/21 Rev. E 14356818
WIRING HARNESS WITH MOLDED JUNCTION ASSEMBLY

5/21 Rev. E 14356819
LED CONNECTION
POWER CORD TO CONNECT CONDENSING UNIT
LIGHT WIRING FOR DD-66 & DD-88
LIGHT WIRING FOR DD-26 & DD-46

5/21 Rev. E 14356820
MOLDED JUNCTION ASSEMBLY
FOR COMPRESSOR WIRING CONNECTION, PLEASE REFER TO THE
COMPRESSOR MANUFACTURER WIRING DIAGRAM