Hussmann DDSS-4MC Installation Manual

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Page 1

DDSS-4MC

Medium Temperature Self Contained

Open Vertical Merchandisers

IMPORTANT

Keep in store

for future reference!

MANUAL - I/O SC DDSS

DDSS-4MC

Installation &

Operation Manual

P/N 0515957_H

April 2015

Spanish 0531283

French 0531284

Page 2

Page 3

P/N 0515957_H iii

AT TENTION

Merchandiser must operate for 24 hours

before loading product!

Regularly check merchandiser temperatures.

Do not break the cold chain. Keep products

in cooler before loading into merchandiser.

These merchandisers are designed

for pre-chilled products.only.

IMPORTANT

KEEP IN STORE FOR FUTURE REFERENCE

Quality that sets industry standards!

12999 St. Charles Rock Road • Bridgeton, MO 63044-2483

U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900

www.hussmann.com

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Page 5

TABLE OF CONTENTS v

BEFORE LOADING PRODUCT ....... iii

ANSI DEFINITIONS

................. vi

INSTALLATION

Certification ........................ 1-1

Hussmann Product Control ........... 1-1

Shipping Damage ................... 1-1

Location ........................... 1-1

Self Contained (Location) ............. 1-2

Model Description .................. 1-3

Unloading ......................... 1-3

Exterior Loading .................... 1-3

Shipping Skid ...................... 1-3

Merchandiser Leveling ............... 1-4

Serial Plate Location ................. 1-4

Refrigeration Unit Access ............. 1-4

Casters ............................ 1-4

Sealing Merchandiser to Floor ......... 1-4

ELECTRICAL / REFRIGERATION

Merchandiser Electrical Data .......... 2-1

Field Wiring ........................ 2-1

Electrical Connections . . . . . . . . . . . . . . . . 2-1

Electrical Outlet ..................... 2-1

Refrigeration (Self Contained) .......... 2-1

Water Outlet and Water Seal .......... 2-2

START UP / OPERATION

Safe-NET III™ User Instructions ...... 3-1

Display ............................ 3-2

Start-Up ........................... 3-2

Sequence of Operation Diagram ....... 3-3

Temperature Adjustment ............. 3-4

Alarms and Codes ................... 3-4

Defrost Termination Switch ........... 3-4

Manual Defrost ..................... 3-4

Temperature Adjustment ............. 3-5

Sensor Location ..................... 3-6

Controls and Adjustments

............ 3-7

Thermostatic Expansion Valve ......... 3-8

TEV Adjustment .................... 3-8

Load Limits ........................ 3-9

Stocking ........................... 3-9

Thermometer ....................... 3-9

Notes ............................ 3-10

MAINTENANCE

Care and Cleaning ................... 4-1

Do NOT Use: ...................... 4-1

Do: ............................... 4-1

Removing Scratches from Bumper ...... 4-2

Cleaning Under Fan Plenum .......... 4-2

Cleaning Stainless Steel Surfaces ....... 4-2

Cleaning Discharge Honeycomb ....... 4-3

Cleaning Coils ...................... 4-3

Cleaning Evaporation Pan ............ 4-4

SERVICE

Replacing Fan Motors and Blades ...... 5-1

Replacing Electronic Ballasts or

LED Power Supplies ................. 5-2

Replacing Fluorescent or LED Fixtures . 5-2

Repairing Aluminum Coil ............ 5-2

Replacing Electronic Ballasts .......... 5-2

APPENDIX

Part Numbers ...................... A-1

Plan View DDSS-4MC .............. A-3

Cross Sections and Refrigeration Data .. A-4

Electrical Data ..................... A-5

Self Contained Wiring Diagram ....... A-6

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

WARRANTY

DDSS Open Vertical Merchandisers

Page 6

REVISION HISTORY

REVISION H — Updated Wiring Diagram

REVISION G — Sensor Location, 3-6; Updated Coil

photos, 3-8, parts list A-1, A-2 new Wiring Diagram, A-5

Replacing Fluorscent Lamps and Ballasts, 5-2

REVISION F — Added Checklists Page 1-7 and

1-8; Added Warning Page 1-3; Cleaning Coils 4-3;

Maintaining Fluorescent Lights 4-4.

REVISION E — FEBRUARY 2012

1. Updated Wiring Diagrams

2. Updated Mexico phone number

REVISION D — JANUARY 2012

1. Removed DDSS-4 Model

2. Added new part numbers

3. Revised refrigeration data

4. Added LED replacement, Page 5-2

* * * * * * * * * * * * * * * * * * * * * * * * * * ANSI Z535.5 DEFINITIONS

• DANGER – Indicate[s] a hazardous

situation which, if not avoided, will result in death or serious injury.

• WARNING – Indicate[s] a hazardous situation which, if not avoided, could result in death or serious injury.

• CAUTION – Indicate[s] a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE – Not related to personal injury – Indicates[s] situations, which if not avoided, could result in damage to equipment.

REVISION C — MAY 2011

1. Revised Cross Section Shelf Length, page A-4

REVISION B — OCTOBER 2010

1. Added self contained location drawings, page 1-2

2. Added Remote Line Sizing, Koolgas, page 2-2

3. Added Koolgas and Remote Refrigeration, page 2-9

4. Added TEV drawing and adjustment, page 3-8

5. Added Cleaning Precautions, page 4-4

6. Added dimension drawings & technical data,

pages, A-1, A-2

ORIGINAL ISSUE — MARCH 2010

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 7

P/N 0515957_H 1-1

INSTALLATION

CERTIFICATION

These merchandisers are manufactured to meet ANSI / National Sanitation Foundation

(NSF

) Standard #7 requirements. Proper installation is required to maintain certification. Near the serial plate, each case carries a label identifying the type of application for which the case was certified.

ANSI/NSF-7 Type I - Display Refrigerator / Freezer

Intended for 75°F / 55% RH Ambient Application

ANSI/NSF-7 Type II - Display Refrigerator / Freezer

Intended for 80°F / 55% RH Ambient Application

ANSI/NSF-7 - Display Refrigerator

Intended for Bulk Produce

HUSSMANN PRODUCT CONTROL

The serial number and shipping date of all equipment is recorded in Hussmann’s files for warranty and replacement part purposes. All correspondence pertaining to warranty or parts ordering must include the serial number of each piece of equipment involved. This is to ensure the customer is provided with the correct parts.

Apparent Loss or Damage

If there is an obvious loss or damage, it must be noted on the freight bill or express receipt and signed by the carrier’s agent; otherwise, carrier may refuse claim.

Concealed Loss or Damage

When loss or damage is not apparent until after equipment is uncrated, retain all packing materials and submit a written response to the carrier for inspection within 15 days.

LOCATION

These merchandisers are designed for displaying products in air conditioned stores where temperature is maintained at or below the ANSI / NSF-7 specified level and relative humidity is maintained at or below 55%.

Recommended operating ambient

temperature is between

65°F (18°C) to 80°F (26.7°C).

Maximum relative humidity is 55%.

SHIPPING DAMAGE

All equipment should be thoroughly examined for shipping damage before and during unloading. This equipment has been carefully inspected at our factory. Any claim for loss or damage must be made to the carrier. The carrier will provide any necessary inspection reports and/or claim forms.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

Placing refrigerated merchandisers in direct sunlight, near hot tables or near other heat sources could impair their efficiency. Like other merchandisers, these merchandisers are sensitive to air disturbances. Air currents passing around merchandisers will seriously impair their operation. Do NOT allow air conditioning, electric fans, open doors or windows, etc. to create air currents around the merchandiser.

DDSS Open Vertical Merchandisers

Page 8

1-2 InstallatIon

Maintain 4 in. Clearance

Maintain

4 in.Clearance

4 in. Clearance

Air

Exhaust

Air

Exhaust

Maintain 4 in. Clearance

Around Merchandiser

Keep discharge and intake areas

free from air currents.

Keep discharge and intake areas

free from air currents.

(Plan View)

Air Exhaust

Air Intake

Front

Back

(Plan View)

Product should always be maintained at proper temperature. This means that from the time the product is received, through storage, preparation and display, the temperature of the product must be controlled to maximize the life of the product.

Be sure to position self contained

merchandisers properly.

SELF CONTAINED models have vented base panels to allow air circulation through the condensing unit. Allow for a minimum 4 in. clearance from walls, merchandisers, and any other large objects near the merchandiser’s vented base panels (for self contained models). Blocking or restricting air flow will adversely affect performance and may damage the refrigeration system.

For California Businesses:

This product may contain chemicals known

to the State of California to cause cancer, birth defects, or other reproductive harm.

This warning is the result of the California State law known as the California Safe Drinking Water and Toxic Enforcement Act of 1986, which is commonly referred to as “Proposition 65.”

This warning does not mean that Hussmann products will cause cancer or reproductive harm, or is in violation of any product-safety standards or requirements. As claried by the California State government, Proposition 65 can be considered more of a ‘right to know’ law than a pure product safety law. When used as designed, Hussmann believes that our products are not harmful. We provide the Proposition 65 warning to stay in compliance with California State law. It is your responsibility to provide accurate Proposition 65 warning labels to your customers when necessary. For more information on Proposition 65, please visit the California State government website.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 0515957_H 1-3

MODEL DESCRIPTION

The DDSS models are open, vertical, medium temperature display merchandisers. Each self contained model will have its own condensing unit, factory installed beneath the display area of the case ready for operation when electrical service is connected.

UNLOADING

Unloading from Trailer:

Lever Bar (also known as a Mule, Johnson Bar, J-bar, Lever Dolly, or Pry Lever)

Move the merchandiser as close as possible to its permanent location and remove all packaging. Check for damage before discarding packaging. Remove all separately packed accessories such as kits and shelves.

Improper handling may cause damage to the merchandiser when unloading. To avoid damage:

EXTERIOR LOADING

Do NOT walk on top of merchandisers or

damage to the merchandisers and serious personal injury could occur.

merchandisers are not structurally designed to support excessive external loading such as the weight of a person. Do

not place heavy objects on the merchandiser.

SHIPPING SKID

Each merchandiser is shipped on a skid to protect the merchandiser’s base, and to make positioning the case easier.

Remove the top of the crate and detach walls from each other. Lift crate from the skid. Unscrew the case from the skid. The fixture can now be lifted off the crate skid. Lift only at base of skid! Remove any braces and/or skids attached (blanket wrapped merchandiser may have skids).

1. Do not drag the merchandiser out of the trailer. Use a Johnson bar (mule).

2. Use a forklift or dolly to remove the merchandiser from the trailer.

Do NOT stand or walk on top of

merchandiser. Do not store items or

ammable materials atop the unit.

DO NOT LAY MERCHANDISER OVER ON THE FLOOR TO REMOVE SKID.

Once the skid is removed, the merchandiser must be lifted —NOT PUSHED— to reposition. To remove the skid, remove screws attaching skid to the merchandiser.

Check floor where cases are to be set to see if it is a level area. Determine the highest part of the floor.

Do NOT remove shipping crate until the

merchandiser is positioned

for installation.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 10

1-4 InstallatIon

Honeycomb Removal

2. Push UP and IN

1. Installed Location

MERCHANDISER LEVELING

Be sure to position merchandisers properly.

Level the merchandiser by all four corners. Merchandiser(s) must be installed level to ensure proper operation of the refrigeration system, and to ensure proper drainage of defrost water.

SERIAL PLATE LOCATION

The serial plate is located at the interior top left end. It contains all pertinent information such as model, serial number, amperage rating, refrigerant type and charge.

Lower Front Panel Removal

Screw

Lower Front Panel

To Install

To Remove

Base

CASTERS

The merchandiser is equipped with optional casters. Use the brake to lock the merchandiser in place.

Serial Plate

REFRIGERATION UNIT ACCESS

The lower front panel may be removed by lifting the panel straight upward and over the tabs on which it is hanging. In a self contained merchandiser, two screws will have to be removed from either end of the panel. The panel is installed by reversing the above procedure. Ensure lower front panel is flat against the floor when installed to prevent air circulation problems on self contained merchandisers.

To lock

SEALING MERCHANDISER TO FLOOR

If required by local sanitary codes, or if the customer desires, merchandisers may be sealed to the floor using a vinyl cove base trim. The size needed will depend on how much variation there is in the floor, from one end of the merchandiser to the other. Sealing of the lower front and rear panels on self contained models may hamper their removal for servicing or maintenance of the condensing unit.

NOTE: Do not allow trim to cover any intake or discharge grilles located in the lower front panel.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 0515957_H 1-5

Form HSCW01 Rev. 30MAY12 P/N 0525209_B

Hussmann Self-Contained Refrigerat i on Equip ment Sta rt Up Check List

***Please note that failure to follow this start-up document may void your factory warranty***

Step Startup Activity Check

Locate, read and maintain install/operation manual in a safe place for

future reference.

2 Examine unit. Confirm there is NO damage or concealed damage.

3 Level the unit, side to side and front to rear.

4 Remove all shipping brackets/compressor straps/bolts etc.

Unit must be run on a dedicated electrical circuit without the use of

an extension cord.

Ensure that the proper electrical requirements for the equipment are

supplied.

7 Verify field electrical connections are tight.

Verify all electrical wiring is secured and clear of any sharp edges or

hot lines.

9 Verify the condensate drain line is properly trapped and pitched.

10 Verify all required clearances on the sides and back of unit.

Advise owner/operator that merchandiser must operate at temperature for 24 hrs prior to loading

Verify there are no air disturbances external to the unit. Heat and air registers, fans, and doors etc.

with product.

LEGAL DISCLAIMER:

Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or w hen the productis installed or operated in a manner contrary to the printed instructions covering installation and service which accompanied such product.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 12

1-6 InstallatIon

Today’s Date

Store Name and Number

Store Address

Unit Model Number

Unit Serial Number

Contractor/Technician

Locate, read and maintain install/operation manual in a safe place for future reference.

Examine unit. Confirm there is NO damage or concealed damage.

Level the unit, side to side and front to rear.

Remove all shipping brackets/compressor straps/bolts etc.

Unit must be run on a dedicated electrical circuit without the use of an extension cord.

Record supply voltage at outlet with unit off.

Volts -

Verify refrigerant lines are properly secured and not touching or rubbing other lines, wires or frame work.

Verify fan motors and motor mounts are tight.

Verify fan blade/s are tight and are not rubbing/contacting other components.

Verify field and factory electrical connections are tight.

Verify electrical connections at lamps are tight and secure.

Verify all electrical wiring is secured and clear of any sharp edges or hot lines.

Verify there any no visible oil or refrigerant leaks.

Verify the condensate drain line is properly trapped and pitched.

Left Side - Right Side -

Are there any air disturbances external to the unit? Heat and air registers, fans, and doors etc.

Start up unit, record total unit amp draw after 5 minutes of operation.

Total unit amps -

Record compressor amp draw.

Amps -

Record anti-sweat heater amp draw if applicable

Amps - N/A

Record voltage reading with unit running.

Volts -

Verify condenser and evaporator fans are working

Is condenser air inlet or air exhaust restricted or recirculating?

Wet Bulb °F

Record condenser air inlet temp (center of the coil)

°F

Record condenser air outlet temp (right after the fan motor)

°F

After unit reaches operating temperature, record unit discharge air temperature (center of the flue).

°F

After unit reaches operating temperature, record unit return air temperature(center of flue).

°F

Does unit controller operate properly? See controller or I/O manual for proper controller operation.

Record defrost heater amp draw (when applicable).

Amps -

Verify there are no visible water leaks.

Verify door switches work correctly, turning evap fans on and off.

Verify unit doors and lids work and are fully sealed.

Verify that all the panels, shields and covers are in place.

Confirm the unit has no vibrations or abnormal noise.

Advise owner/operator that merchandiser must operate at temperature for 24 hrs prior to loading with product.

Technician Notes:

Hussmann Self-Contained Refrigeration Equipment Start Up Check List

Hussmann Corporation, 12999 St Charles Rock Road, Bridgeton, MO 63044- 2483 U.S.A.

Email: hussmannwarrantyregistration@hussmann.com Fax: 866-443-1254

Startup activity

What are the clearances on the sides and back of unit?

Record ambient conditions around unit (wet Bulb temperature and dry bulb temperature) and RH%

Record date of completion or

requested data (i.e., voltage,

measurements, instrument readings).

Back - Top -

Dry Bulb °F RH%

Form HSCW01 Rev. 30MAY12 P/N 0525209_B

LEGAL DISCLAIMER: Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or when the product is installed or operated in a manner contrary to the printed instructions covering installation and service which accompanied such product.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 13

DDSS-4MC

P/N 0515957_H 2-1

ELECTRICAL / REFRIGERATION

MERCHANDISER ELECTRICAL DATA

Refer to merchandiser serial plate for electrical information.

FIELD WIRING

Field wiring must be sized for component amperes stamped on the serial plate. Actual ampere draw may be less than specified.

To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats.

— LOCK OUT / TAG OUT —

ALWAYS CHECK THE SERIAL PLATE FOR

COMPONENT AMPERES

ELECTRICAL CONNECTIONS

All wiring must be in compliance with NEC and local codes. All electrical connections (for remote models) are to be made in the electrical Handy Box located behind the removable base panel at the left end of the merchandiser when facing the discharge honeycomb.

ELECTRICAL OUTLET:

Before the merchandiser is connected to any wall circuit, use a voltmeter to check that the outlet is at 100% of the rated voltage. The wall circuit must be dedicated for the merchandiser. Failure to do so voids the warranty. Do not use an extension cord. Never plug in more than one merchandiser per electrical circuit.

• Always use a dedicated circuit with the amperage stated on the unit.

• Plug into an outlet designed for the plug.

• Do not overload the circuit

• Do not use long or thin extension cords. Never use adapters.

• If in doubt, call an electrician.

Self-contained models have factory-installed power cords attached at the electrical box.

NEMA 6-20R

Receptable

REFRIGERATION (Self Contained Models)

Each self contained model is equipped with its own condensing unit and control panel located beneath the display area. The correct type of refrigerant will be stamped on each merchandiser’s serial plate. The merchandiser refrigeration piping is leak tested. The unit is charged with refrigerant, and shipped from the factory with all service valves open.

Risk of Electric Shock. If cord or plug

becomes damaged, replace only with

a cord and plug of the same type.

Merchandiser must be grounded.

Do not remove the power supply cord ground.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 14

2-2 InstallatIon

WATER OUTLET AND WATER SEAL

The condensate water outlet is located in the center of the merchandiser. The outlet has an external water seal installed from the factory.

This water seal drains into the condensate evaporation pan located beneath the merchandiser. Remote models have a fan to circulate air around the base to keep condensation from forming.

NOTE: All lower base panels must be in place when the refrigerator is operating. If not, airflow from the condenser (self-contained) will be directed over the evaporation pan and defrost water in the pan may overflow.

When brazing pipes, be sure to use the

insulation blanket shipped with the

merchandiser to prevent damage to the

metal merchandiser bottom.

Refrigeration lines are under pressure.

Refrigerant must be recovered before

attempting any connection or repair.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 15

P/N 0515957_H 3-1

START UP / OPERATION

The Safe-NET III controller includes the following features and connections.

• Adjustment knob:

IN STA LLE R

It is the contractor’s responsibility to

install merchandiser(s) in accordance with

all local building and health codes.

Safe-NET III™

TEMPERATURE AND DEFROST

CONTROLLER

SAFE-NET III™ USER INSTRUCTIONS

Your refrigerated case uses a Hussmann Safe-NET™ III temperature and defrost controller to precisely maintain the temperature and prevent frost buildup on the cooling coil. LEDs indicate when the compressor or refrigeration is on, when the case is in a defrost cycle, if the temperature is outside the desired range, or if there is a sensor failure.

An adjustment knob allows the temperature to be set within the configured range and can power off the controller and compressor. Your controller has been custom-configured to provide the best temperature and defrost control for your chilled or frozen food.

Adjusts the temperature setpoint. Turn adjustment knob to OFF to turn off refrigeration system. Unplug merchandiser from power before servicing the unit.

Case

Heater

E72R

Temperature

Fan E72R only

Sensor

Compressor

Evaporator Temperature Sensor

Power

Sensor and Switch Common

Defrost Termination Switch (optional)

Interface Box and Copy Card TTL Connector

• Controller LEDs: Compressor Powered On LED (green):

Lights while the compressor is running or the refrigeration valve is open. Defrost Cycle LED (yellow): Lights while the refrigeration coil is defrosting. Temperature or Sensor Alarm (red): Lights if the temperature is too warm or too cold. Flashes if a sensor fails.

The front of the controller has an adjustment knob and status LEDs. The back of the controller has connections for sensors and switched equipment.

Adustment

Knob

Compressor Powered On

Te mperature or Sensor Alarm

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

green

Defrost Cycle

yellow

red

Warm

Position

Off

Position

Cold Position

DDSS Open Vertical Merchandisers

Page 16

3-2 Start up / OperatiOn

• Rear connections: – Case temperature sensor:

• Typically senses the temperature of the air in the case. Used by the controller to determine when to power on or power off the compressor or refrigeration.

– Evaporator temperature sensor:

• Senses the temperature of the refrigeration coil. Terminates a defrost cycle when refrigeration coil ice melts.

– Compressor or refrigeration relay:

• Switches on the compressor or refrigeration valve for cooling.

The optional evaporator fan remains ON when the adjustment knob is in the OFF position.

DISPLAY

The display includes three red LEDs and two digits for temperature, defrost status, and error codes.

The three display LEDs are red, and their behavior matches the LEDs on the controller.

Compressor

Powered On

START-UP

1. Plug in the merchandiser.

The OFF Position does not disconnect line voltage to the case, refrigeration unit, fan, or heater.

NOTE: The 65°C Version Controller includes

a Parameter Code Number. This number indicates what program has been loaded into the controller. When the Controller is first powered up or is turned off and then back on a 2 digit Parameter Code Number will display for 3 seconds. Then the Self Check will Start.

2. Wait for the self check to complete. During the self check, each LED flashes for one second, then all LEDs turn on for two seconds. If the LEDs do not flash, make sure the adjustment knob is not in the Off position.

• After the self check, all LEDs turn off until the compressor starts. There may be a delay before the compressor starts. If the red Temperature or Sensor Alarm LED stays on after the self check.

• The green Compressor Powered On LED turns on when the compressor starts.

Parameter Code is 54.

Defrost Cycle

NOTE: Do NOT load product until AFTER merchandiser operates for 24 hours and reaches

Temperature or

Sensor Alarm

desired operating temperature.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 17

P/N 0515957_H 3-3

SEQUENCE OF OPERATION

DDSS-4MC

Compressor

Starts

Compressor runs continuously until it reaches its cut-out setting.

Defrost cycle is temperature terminated. Defrost initiates two hours after start up.

When powered up there will be a delay of 30 sec. at start up before the compressor starts.

OFF

GREEN (REFRIGERATION) YELLOW (DEFROST)

RED (ALARM)

“OFF” POSITION

Initial Defrost

Two Hours After Start Up

Pull down Compressor On

Compressor

Starts

Start Up

Time to Subsequent Defrost

(6 hours or Demand Defrost)

Refrigeration Cycle

Maximum Defrost

Time 40 Minutes

(Failsafe)

Compressor

Off Cycle

WARM COLD

Safe-Net III Controller

Defrost Cycle Terminates at

45° F.

GREEN (REFRIGERATION)

YELLOW (DEFROST)

RED (ALARM)

Time to Subsequent Defrost (6 hours or Demand Defrost)

Maximum Defrost

Time 40 Minutes

(Failsafe)

Pulldown After Defrost

DISPLAY

Compressor ON

1. Apply power to the merchandiser. Wait for the self check to complete. During the self check, each LED flashes for one second and then all LEDs turn on for two seconds. If the LEDs do not flash, make sure the adjustment knob is not in the “OFF” position.

1A. The merchandiser temperature displays at

startup. The initial defrost starts two hours later. The display will show the temperature at the start of defrost. This reading will remain displayed during defrost and until it times out, even though the refrigeration mode has been initiated. (The green LED will be lit.)

2. The compressor will start after a 1-minute delay

once power is applied.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

3. The compressor will continue to run until it reaches its cut-out temperature (Pulldown).

4. The refrigeration cycle will continue for the next subsequent scheduled (6-hours) or demand defrost. The digital display will display the temperature reading for 10 minutes after defrost.

5. The above process will repeat (steps 3 and 4) until the power is interrupted.

6. If power stops, the process will start over at step 1, and the time to subsequent defrost will reset.

DDSS Open Vertical Merchandisers

Page 18

3-4 Start up / OperatiOn

TEMPERATURE ADJUSTMENT

Rotate the adjustment knob counter clockwise for a warmer setpoint or clockwise for a colder setpoint.

• While the temperature is being adjusted, the optional display shows the setpoint (cut out value). A few seconds after the temperature is set, the display reverts to showing the sensed temperature in the merchandiser.

ALARMS AND CODES

Flashing TemperaTure or sensor alarm leD, e1 or e2

If the Temperature or Sensor Alarm LED (red) on the controller and display is flashing, a temperature sensor has failed. The display shows E1 if the case sensor has failed or E2 if the evaporator sensor has failed.

DEFROST TERMINATION SWITCH

Merchandisers may use a defrost termination switch, instead of an evaporator sensor to terminate a defrost cycle. The defrost termination switch is temperature activated and senses the completion of defrost.

Compressor Off Time If Sensor Failed

Compressor

Status

Off

Compressor Off Time If Sensor Failed

Off

Time

MANUAL DEFROST

Note location of

1. knob setting

ColdWarm

Note:

This procedure initiates a manual or forced defrost.

If the merchandiser sensor fails, refrigeration will run continuously. Turn off, or repeat a duty cycle of a few minutes on and a few minutes off.

Rotate knob fully

2. counterclockwise until it stops (full warm - “OFF” position)

Warm Cold

After 10 seconds, but before 20 seconds, rotate knob fully clockwise until it stops (full cold position)

ColdWarm

IMPORTANT: Return the control knob to its original setting (Step1) once the manual defrost has been initiated.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 19

P/N 0515957_H 3-5

Display - at Full Cold Model DDSS-4MC

WARM COLD

“OFF” Position

Safe-NET III Control Set at Full Cold Position

WARM

Safe-NET III Control # 1 Position

Display - at #1 Position Model DDSS-4MC

COLD

TEMPERATURE ADJUSTMENT

1. Rotate the adjustment knob counter clock-

wise for a warmer setpoint or clockwise for a colder setpoint.

2. While adjusting the temperature, the display shows the setpoint (cut out value). A few seconds after the temperature is set, the controller reverts to the sensed temperature in the merchandiser.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

3. To verify merchandiser settings, turn the dial to warm and cold as shown above. Output readings should be within one degree of the temperatures shown above.

DDSS Open Vertical Merchandisers

Page 20

3-6 Start up / OperatiOn

SENSOR LOCATION

Black Air Sensor on Interior Liner

28 inches

2 inches

Black Wire

(Black Sheath)

(Air Sensor #8)

Black Wire

(Yellow Sheath)

(Defrost Sensor #9)

Suction Line

Yellow Defrost Sensor is placed next to

Tee, Reducing W-4014

#11 Not Used

White (Common Both Sensors #10)

Safe-NET

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 21

P/N 0515957_H 3-7

CONTROLS and ADJUSTMENTS

Refrigeration

Controls

Model

DDSS-4MC

Product Application

Medium Temp. (Dairy, Deli)

Discharge Air Temperature

24° F to 32° F 45° F

1. The Safe-NET III Controller controls refrigeration temperature. This is factory installed in the control panel. Adjust this control knob to maintain the discharge air temperature shown. Measure discharge air temperatures at the center of the honeycomb.

Defrost Controls

Defrost Frequency (per day)

Type of Defrost

Off Time

Termination Temperature

Failsafe Time

(Minutes)

Defrosts are time initiated and temperature terminated for self contained and remote, including Koolgas models. The defrost setting is factory set as shown above.

To ensure a thorough defrost, defrost must be terminated by the temperature termination setting — not by time.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 22

3-8 Start up / OperatiOn

THERMOSTATIC EXPANSION VALVE (TEV)

Each self contained merchandiser has its own evaporator coil and a pre-set thermostatic expansion valve (TEV). The TEV has been factory set at design conditions to provide the recommended performance.

TEV Adjustment

Expansion valves may be adjusted to fully feed the evaporator. Before attempting to adjust valves, make sure the evaporator is clear or only lightly covered with frost, and the merchandiser is within 10°F of its expected operating temperature.

Adjust the valve as Follows:

a. Attach a probe to the suction line near the expansion valve bulb.

b. Obtain a pressure reading from the factory installed Schraeder valve. Convert the pressure reading to a saturated temperature for the refrigerant.

Temperature (b) minus Temperature (a) is the superheat. The valve should be adjusted so that the greatest difference between the two temperatures is 3°F to 5° F.

Make adjustments of no more than

/2 turn of the valve stem at a time and wait for at least 15 minutes before rechecking the probe temperature and making further adjustments.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 23

P/N 0515957_H 3-9

LOAD LIMITS

Each merchandiser has a load limit decal. Shelf life of perishables will be short if load limit is violated.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

At no time should merchAndisers be

stocked beyond the loAd limits indicAted.

do not block honeycomb.

LOAD LIMIT

STOCKING

Product should NOT be placed inside the merchandisers until merchandisers are at proper operating temperature.

Allow merchandiser 24 hours to operate before loading product.

THERMOMETER

DDSS models have a thermometer. The thermometer is located at the top, interior of the merchandiser.

Contour End Shown

(Other Optional Ends Available)

Air Curtain

Proper rotation of product during stocking is necessary to prevent product loss. Always bring the oldest product to the front and set the newest to the back.

Air dischArge And return flues must

remAin open And free of obstruction At All times to provide proper refrigeration and

air curtain performance. Do not allow product, packages, signs, etc. to block these grilles. Do not use non-approved shelving, baskets, display racks, or any accessory that could hamper air curtain performance.

Do not allow product to be placed outside of the designated load limits in the illustration.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

Do Not Load Product Past Front of Shelves

Do Not Allow Product to Block Return Air Grille

LOAD LIMIT

DDSS Open Vertical Merchandisers

Page 24

3-10 Start up / OperatiOn

NOTES:

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 25

P/N 0515957_H 4-1

MAINTENANCE

CARE AND CLEANING

Long life and satisfactory performance of any equipment is dependent upon the care it receives. To ensure long life, proper sanitation and minimum maintenance costs, these merchandisers should be thoroughly cleaned, all debris removed and the interiors washed down, weekly.

Exterior Surfaces

The exterior surfaces must be cleaned with a mild detergent and warm water to protect and maintain their attractive finish.

abrasive cleaNsers or scouriNg pads.

Never use

Interior Surfaces

The interior surfaces may be cleaned with most domestic detergents, ammonia based cleaners and sanitizing solutions with no harm to the surface. Self contained models empty into a limited capacity evaporation pan, which will overflow if excess water is used in cleaning.

Do:

•Remove the product and all loose debris to avoid clogging the waste outlet.

•Store product in a refrigerated area such as a cooler. Remove only as much product as can be taken to the cooler in a timely manner.

•Disconnect electrical power before cleaning.

•Thoroughly clean all surfaces with soap and hot water.

pressure hoses to wash the iNterior.

These will desTroy The merchandisers’

sealing causing leaks and poor performance.

•Take care to minimize direct contact between fan motors and cleaning or rinse water.

•Do NOT flood merchandiser with water.

Never iNtroduce water faster thaN the

waste outlet caN remove it.

do Not use steam or high water

Do NOT Use:

•Abrasive cleansers and scouring pads, as these will mar the finish.

•Coarse paper towels on coated glass.

•Ammonia-based cleaners on acrylic parts.

•Solvent, oil or acidic based cleaners on any interior surfaces.

•Do not use high pressure water hoses.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

Do NOT allow cleaning agent or

cloth to contact food product.

self coNtaiNed models empty iNto a coNdeNsate evaporatioN paN that will overflow if too much water is iNtroduced duriNg cleaNiNg.

•Allow merchandisers to dry before resuming operation.

•After cleaning is completed, turn on power to the merchandiser.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 26

4-2 Maintenance

Do NOT use HOT water on Cold glass

Surfaces. This can cause the glass to

shatter and could result in personal

injury. Allow glass fronts, to warm

before applying hot water.

REMOVING SCRATCHES FROM BUMPER

Most scratches and dings can be removed using the following procedure.

1. Use steel wool to smooth out the surface area of the bumper.

2. Clean area.

3. Apply vinyl or car wax and polish surface for a smooth glossy finish.

SHUT FANS OFF DURING

CLEANING PROCESS.

Power Connector

CLEANING UNDER FAN PLENUM

To facilitate cleaning, the fan plenum is hinged.

After cleaning be sure the plenum is properly lowered into position or producT loss will

resulT due to improper refrigeration.

— LOCK OUT / TAG OUT — To avoid serious injury or death from electrical shock, always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component. This includes, but is not limited to, such items as doors, lights, fans, heaters, and thermostats.

DO NOT FLOOD!

Use only enough water necessary to clean

surface. Water must not drip down the case!

Never use ammonia based cleansers, abrasive

cleansers, or scouring pads.

CLEANING STAINLESS STEEL SURFACES

Use non-abrasive cleaning materials, and always polish with grain of the steel. Use warm water or add a mild detergent to the water and apply with a cloth. Always wipe rails dry after wetting.

Use alkaline chlorinated or non-chlorine containing cleaners such as window cleaners and mild detergents. Do not use cleaners containing salts as this may cause pitting and rusting of the stainless steel finish. Do not use bleach.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 27

P/N 0515957_H 4-3

CLEANING DISCHARGE HONEYCOMB

Discharge air honeycomb should be cleaned every six months. Dirty honeycomb will cause merchandisers to perform poorly. The honeycomb may be cleaned with a vacuum cleaner. Soap and water may be used if all water is removed from the honeycomb cells before replacing. Be careful not to damage the honeycomb.

1. Using a flat object such as a screw driver, behind the rear edge of the honeycomb on on the right hand end, and gently pull down.

2. Clean with a mild detergent and warm water and dry the honeycomb.

3. After cleaning, replace in reverse order. Damaged honeycomb must be replaced.

CLEANING COILS

Condenser coils should be cleaned at least once per month. Additional cleaning may be needed depending on the operational environment. A dirty condenser blocks normal airflow through the coils.

Airflow blockage increases energy consumption and reduces the merchandiser’s ability to maintain operating temperature.

1. Installed Location

2. Push UP and IN

To clean the coils, use a vacuum cleaner with a wand attachment and a soft (non-metallic) brush to remove dirt and debris. Do not bend coil fins. Always wear gloves and protective eye wear when cleaning near sharp coil fins and dust particles.

PRECAUTION

CLEANING PRECAUTIONS

When Cleaning:

• Do not use high pressure water hoses

• Do not introduce water faster than waste outlet can drain

• NEVER INTRODUCE WATER ON SELF CONTAINED

UNIT WITH AN EVAPORATION PAN

• NEVER USE A CLEANING OR SANITIZING SOLUTION THAT HAS OIL BASE (these will dissolve the butyl sealants) or an AMMONIA BASE (this will corrode the copper components of the merchandiser)

• TO PRESERVE THE ATTRACTIVE FINISH:

• Use a water and a mild detergent for the exterior only

• Do NOT use a chlorinated cleaner on any surface

• Do NOT use abrasives or steel wool scouring pads

(these will mar the finish)

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 28

4-4 Maintenance

CLEANING EVAPORATION PAN

The condensate water outlet empties into a limited capacity evaporation pan.

Debris or dirt accumulation inside the condensate evaporation pan or on the heater coil will reduce the pan’s evaporation capacity and cause premature heater failure. The evaporation pan waste water will overflow and spill onto the floor if the heater is not properly operating.

Remove accumulated debris from the evaporation pan. Wipe down heater coil with a cloth and warm water. Be sure to remove any dirt, debris or liquids from the heater coil.

Water introduced during cleaning will cause the evaporation pan to overflow.

NEVER USE SHARP OBJECTS AROUND COILS. Use a soft brush or vacuum brush to clean debris from coils. Do not puncture coils!

Do not bend fins. Contact an authorized service technician if a coil is punctured, cracked, or otherwise damaged.

MAINTAINING FLUORESCENT LAMPS (IF APPLICABLE)

Many of the self-contained cases are equipped with LEDs. For cases with fluorescent lamps, follow these directions to ensure long-lasting life of the lights:

Fluorescent lamps should not be allowed to run to failure. If a re-lamp schedule is not in place, the tubes should be inspected for signs of degradation (blackened ends). Degraded or failed tubes should be replaced.

Allowing severly degraded lamps to operate may cause a ballast failure or could expose the lamp holder to excessive heat. Replacing degraded bulbs is more cost effective than replacing ballast and lamp-holders. Traditional re-lamp programs are 18-to-24 month intervals. In the absence of a re-lamp program, a yearly inspection of the lighting system is recommended.

1. Inspect all lamp sockets and plug-receptacle connections for signs of arching. Replace any component that shows signs of arching.

ICE in or on the coil indicates the refrigeration and defrost cycle is not operating properly. Contact an authorized service technician to determine the cause of icing, and to make adjustments as necessary. To maintain product integrity, move all product to a cooler until the unit has returned to normal operating temperatures.

2. Make sure all unused receptacles have their close-off covers securely installed.

3. Make sure proper cleaning procedures are followed. Lights and fans MUST be turned off when a case is cleaned and MUST be allowed to dry before turning power back on.

4. Do not use a pressure nozzle to clean inside of case.

Evaporation Pan is Hot!

and poses risk of bodily injury – Always Wear gloves and protective eye wear when servicing. Turn off evaporation pan heater, and allow pan to cool.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 29

P/N 0515957_H 5-1

Fan Assembly

SERVICE

REPLACING FAN MOTORS AND BLADES

Should it ever be necessary to service or replace the fan motors or blades be certain that the fan blades are reinstalled correctly.

musT be insTalled wiTh raised embossing

The blades

(parT number on plasTic blades) posiTioned

as indicaTed on The parTs lisT.

For access to these fans:

1. Remove product and place in a refrigerated area. Turn off power to the merchandiser.

2. Remove bottom display pans.

3. Disconnect fan from wiring harness.

4. Remove fan blade.

11. Close air gaps under fan plenum. Warmer air moving into refrigerated air reduces effective cooling. If the plenum does not rest against the case bottom without gaps, apply foam tape to the bottom of the fan plenum to reduce improper air movement. Use silicone sealant to close other gaps.

— LOCK OUT / TAG OUT —

5. Lift fan plenum and remove screws holding bottom of motor to fan basket.

6. Replace fan motor and blade.

7. Lower fan plenum.

8. Reconnect fan to wiring harness.

9. Turn on power.

10. Verify that motor is working and blade is turning in the correct direction.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

12. Reinstall display pans. Bring merchandiser to operating temperature before restocking.

Speed-Nut

Screws

Bracket

Plenum

Note: Plenum length and number of fans will vary with model.

Fan Blade

Airflow Direction

Motor

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 30

5-2 Service

REPLACING ELECTRONIC BALLASTS OR LED POWER SUPPLIES

The canopy ballast or LED power supply is located in the electrical box on top of the merchandiser.

To gain access:

1. disconnecT The elecTrical power To

The merchandiser.

2. Remove top panel by removing the screws on top of the case.

REPLACING FLUORESCENT LAMPS OR LED FIXTURES

The lamp is removed as shown in the image below. The lamp twists out of its end cap.

The lamp can be replaced without removing the top panel.

Fluorescent Lamp

3. The ballast is located under the top sign.

Fluorescent lamps contain mercury vapor. Mercury exposure at high levels can harm the brain, heart, kidneys, lungs, and immune system of people of all ages. Do not break or puncture ﬂuorescent lamps. Dispose of, or store, all ﬂuorescent lamps in accordance with Federal (40 CFR 273), State, and local hazardous waste requirements. Refer to http://www.epa.gov/mercury/about.htm

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 31

Appendix A — TechnicAl dATA A-1

REPAIRING ALUMINUM COIL

The aluminum coils used in Hussmann merchandisers may be easily repaired in the eld. Materials are available from local refrigeration wholesalers.

NOTE: Hussmann Aluminum melts at Aladdin 3-in-1 rod at 732°F (389°C) X-Ergon Acid core at 455°F (235°C)

Technique:

1. Locate Leak.

2. REMOVE ALL PRESSURE.

3. Brush area UNDER HEAT.

1125°F (607°C)

4. Use PRESTOLITE TORCH ONLY.

Number6 tip.

5. Maintain separate set of stainless steel brushes, and use only on aluminum.

6. Tin surface around area.

7. Brush tinned surface UNDER HEAT,

thoroughly lling the open pores around

leak.

8. Repair leak. Let aluminum melt solder, NOT the torch.

9. Don’t repair for looks. Go for thickness.

10. Perform a leak check.

11. Wash with water.

12. Cover with a good exible sealant.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 32

Appendix A — TechnicAl dATA A-2

Models DDSS4-MC

Standard Parts

Description Part Number

LH End (Solid) Standard 0512892 X

RH End ( Solid) Standard 0512895 X

LH View End 0513316 X

RH View End 0513221 X

End Acrylic (View end) 0512737 X

Front Bumper (Black) 0512899 X

Evap Fan Harness Main Feed 0376608 X

Evap Fan Harness 0376609 X

Air Sensor (Black) 4000MM 0510533 X

Defrost Sensor (Yellow) 4000MM 0510532 X

Safe-Net III Controller 65C 0524122 X

Safe-Net III Display (F°) 65C 1H59052001 X

Safe-Net III Display Interface Cable (1M) 0509783 X

Safe-Net III Control Harness 0513058 X

Condensate pan heater relay SPDT NC 208V 0342599002 X

Compressor Relay (T92P7A22-240) 1804241 X

Power Switch 03S422 X

Caster 35S088 X

Honeycomb 29S866 X

Power Cord NEMA 6-20P 1804385 X

Flourscent light (Canopy) F32T8 06S214 X

Safety Shield for Flourscent light (Canopy) 06S07414 X

Ballast 06S187 X

LED Power Supply (optional) 0518898 X

LED Light (optional) 0515965 X

Lamp Holder 06S248 X

Light Switch 03S176 X

Flue Glass 29S863 X

Sign Panel (acrylic) 29S8731 X

Glass Shelf 13" complete 0513065 X

Glass for Shelf 13" 0513062 X

Glass Shelf 10" complete 145996 X

Glass for Shelf 10" 29S870 X

Hussmann refrigerated merchandisers conﬁgured for sale for use in the United States meet or surpass the requirements of the DOE 2012 energy efﬁciency standards.

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 33

A-3 Appendix A — TechnicAl dATA

Refrigeration DDSS4-MC

Description Part Number

Condensing Unit Assy (134a) Complete w/ condensate pan 0511124 X

Compressor RST55C1E-CAV-201 E110101001 X

Condenser Coil 2100226 X

Drier (C052-S) 17S507 X

Condenser Fan Motor & Bracket 7408727 X

Condenser Fan Blade 0500354 X

Hi-Pressure Switch 03S558 X

Retainer ring Hi-Pressure Switch 05S625 X

Pull-Out coil assy 0511147 X

Assembly Evaporator Coil (Complete) 0511121 X

Evaporator coil 26S138 X

Distributor TYP 1 BA1016-01 17S579 X

TXV FBSE-1/2 C 0515679 X

Evaporator Fan Motor (Motor 12W,basket,less blade) 0523011 X

Evaporator Fan Blade 014278002 X

Condensate Pan DDSS4-MC

Description Part Number

Electric Condensate Pan Assy (w/heater & float switch) 1H11037001 X

Condensate Pan Heater (750w) 1H07734001 X

Float Switch 1804342 X

Sheel Metal Replacement Parts Painted DDSS4-MC

Description Part Number

Front Access Panel 0511144 X

Panel Top Sign 144711 X

Return Air Grille (Stainless Steel) 146721 X

Bottom Shelf 0511142 X

LH End Panel -Base 0511148 X

RH End Panel -Base 0511145 X

Metal Shelf 10" X 4' (optional) 22S3021 X

Metal Shelf 12" X 4' (optional) 22S3022 X

All these part numbers below are painted assemblies

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 34

Appendix A — TechnicAl dATA A-4

DDSS-4MC

Refrigeration

Outlet

4-in. Minimum Clearance

Electrical Outlets

Evaporator

Pan

FRONT

Condensing

Unit

Drain Control

Panel

General

Case Length (Note: Includes One Pair Ends) 4ft (51) (1295)

Maximum O/S dimension of case back to front 30 1/2 (775)

(Note: Includes bumper)

Waste Outlet

RH end of case (from outside of End Assembly) 25

/2 (648)

to center of waste outlet

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

DDSS Open Vertical Merchandisers

Page 35

A-5 Appendix A — TechnicAl dATA

Dimensions shown as inches and (mm).

REFRIGERATION DATA

DDSS-4MC

4-in. Minimum Clearance

FAN

Condensing Unit

for Optional

Self-Contained

Case

C O

Note: This data is based on store temperature and humidity that does not exceed 80°F and 55% R.H. unless otherwise stated. Schedule defrost at night while lights are off.

DDSS-4MC

Thermostat Setting CI/CO (°F)

Position #1 34 / 31 position #7 34 / 14

Condensing Unit (hp) 1

Condensing Unit Capacity 9992

(Btu/hr at std. rating conditions)

DEFROST DATA

Frequency (hr)

offtime

Failsafe (minutes) 40

Defrost Termination Pressure (psig) 45°F

PHYSICAL DATA

Refrigerant Charge

DDSS-4MC 44 oz 1.248 kg

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 36

Appendix A — TechnicAl dATA A-6

Electrical Data

Note: These are rated values for individual components and should not be added together to determine total merchandiser electrical load.

DDSS-4MC

Number of Fans – 12W 1

Self-Contained Remote Evaporator Fans Amperes Watts Amperes Watts

230V 60Hz Standard 0.33 0.33 50 0.12 18

Condensate Pan Heaters (230V) 3.8 750 3.8 750

Condensing Unit (208/230V, 1Ph, 60Hz) Standard — Self-Contained

Compressor LRA 33.7 Compressor RLA 6.8

Minimum Circuit Ampacity — Self-Contained

230V 1Ph 60Hz Standard 10.85

230V 1PH 60Hz energy Efcient 10.67

Maximum Over Circuit Protection 208/230V — Self-Contained 20

Maximum Circuit Ampacity — Remote

230V 1Ph 60Hz Standard 4.65

Maximum Over Circuit Protection 208/230V — Remote 15

DDSS-4 / DDSS4MC

AHRI Total Display Area

(Sq Ft/Case) 13.01 ft

1 Computed using AHRI 1200 standard methodology: Total Display Area, ft2 [m2] / Unit of Length, ft [m]

ESTIMATED SHIPPING WEIGHT

/case ( 1.21 m

/case)

Case Self Contained with Shipping Crate End lb (kg) 547 (248kg) 659 (299kg) Included

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

Actual weights will vary according to optional kits included.

DDSS Open Vertical Merchandisers

Page 37

A-7 Appendix A — TechnicAl dATA

DDSS-4MC — Self Contained

P/N 0515957_H U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com

Page 38

To obtain warranty information

or other support, contact your

Hussmann representative.

Please include the model and

serial number of the product.

Hussmann Corporation, Corporate Headquarters: Bridgeton, Missouri, U.S.A. 63044-2483 01 October 2012