Hussmann MicroSC MDN-BA Bedienungsanleitung

MDN-BA/SA

Medium Temperature Self Contained

Open Vertical Merchandiser

with R-290 Refrigerant

Installation &

Operation Manual

P/N 9FQ-6-P110-075-00_B

April 2021

Spanish 9FQ-6-P110-077-00

WARNINGS:

If the information in these instructions are not followed

exactly, a ﬁre or explosion may result, causing property

damage, personal injury or death.

Installation and service must be performed by a qualiﬁed

installer or service agency.

READ THE ENTIRE MANUAL BEFORE

INSTALLING OR USING THIS EQUIPMENT.

The unit uses R-290 gas as the refrigerant. R-290 is

ﬂammable and heavier than air. It collects ﬁrst in low

areas but can be circulated by the fans. If propane gas

is present or even suspected, do not allow untrained

personnel to attempt to ﬁnd the cause. The propane

gas used in the unit has no odor.The lack of smell does

not indicate a lack of escaped gas. If a leak is detected,

immediately evacuate all persons from the store, and

contact the local ﬁre department to advise them that

a propane leak has occurred. Do not let any persons

back into the store until the qualiﬁed service technician

has arrived and that technician advises that it is safe to

return to the store. No open ﬂames, cigarettes or other

possible sources of ignition should be used inside or in

the vicinity of the units.

FAILURETOABIDE BYTHIS WARNING COULD

RESULT IN AN EXPLOSION, DEATH, INJURYAND

PROPERTY DAMAGE.

IMPORTANT

Keep in store for future reference!

I/O MANUAL MDN R-290

BEFORE YOU BEGIN

Read these instructions completely and carefully.

PERSONAL PROTECTION EQUIPMENT (PPE)

Personal Protection Equipment (PPE) is required whenever installing or servicing this

equipment. Always wear safety glasses, gloves, protective boots or shoes, long pants, and

a long-sleeve shirt as required when installing or servicing this equipment.

1. If the information in these instructions are not followed exactly, a ﬁre or explosion may result, causing property damage, personal injury

or death.

2. Installation and service must be performed by a qualiﬁed installer or service agency.

3. This unit is designed only for use with R-290 gas as the designated refrigerant.

THE REFRIGERANT LOOP IS SEALED. ONLY A QUALIFIED TECHNICIAN SHOULD ATTEMPT TO SERVICE!

• Propane is ﬂammable and heavier than air.

• It collects ﬁrst in the low areas but can be circulated by the fans.

• If R-290 is present or even suspected, do not allow untrained personnel to attempt to ﬁnd the cause.

• The propane gas used in the unit has no odor.

• The lack of smell does not indicate a lack of escaped gas.

• If a leak is detected, immediately evacuate all persons from the store, and contact the local ﬁre department to advise them that a

pro pane leak has occurred.

• Do not let any persons back into the store until the qualiﬁed service technician has arrived and that technician advises that it is

safe to return to the store.

• A hand-held propane leak detector (“sniffer”) shall be used before any repair and/or maintenance.

• No open ﬂames, cigarettes or other possible sources of ignition should be used inside the building where the units are located

until the qualiﬁed service technician and/or local ﬁre department determines that all propane has been cleared from the area and

from the refrigeration systems.

• Component parts are designed for propane and non-incendive and non-sparking. Component parts shall only be replaced with

identical repair parts.

FAILURE TOABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE.

P/N 9FQ-6-P110-075-00_A ii

P/N 9FQ-6-P110-075-00_Biii

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

Merchandiser must operate for 24 hours

before loading product!

Regularly check merchandiser temperatures.

Do not break the cold chain. Keep products

in freezer before loading into merchandiser.

These merchandisers are designed

for only pre-frozen products.

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 only pre-chilled products.

TABLE OF CONTENTS iv

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 1-800-890-2900

www.hussmann.com

ANSI Z535.5 DEFINITIONS .............. v

INSTALLATION

UL Listing ............................ 1-1

Federal / State Regulation ............... 1-1

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

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

Apparent Loss Or Damage .............. 1-1

Concealed Loss Or Damage ............. 1-1

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

Part Names ........................... 1-3

Additional Parts ....................... 1-4

Model Description ..................... 1-5

Unloading ............................ 1-5

Unloading from Trailer ......................... 1-5

Serial Plate Location .................... 1-5

Exterior Loading ....................... 1-5

Shipping Skid ......................... 1-5

Thermometer .......................... 1-5

Equipment Start Up Check List ........... 1-6

ELECTRICAL / REFRIGERATION

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

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

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

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

Power Switch .......................... 2-1

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

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

Controls and Adjustments ................ 2-3

Controller Operation .................... 2-4

Controller Connections .................. 2-5

Controller Buttons ..................... 2-6

Setpoint............................... 2-7

Shelves ............................... 2-8

Stocking .............................. 2-8

Drain Water ........................... 2-8

Service Safety ......................... 2-10

Replacing Refrigeration

System Componets .....................2-11

Steps to Recover Refrigerant ............ 2-11

Charging ............................ 2-11

Waste Outlet and Water Seal ............ 2-12

MAINTENANCE

Care and Cleaning ...................... 3-1

Exterior Surfaces ................................3-1

Interior Surfaces ................................3-1

Do NOT Use: ...........................3-1

Do Use:................................3-1

Removing Scratches from Bumper ......... 3-1

Warnings...............................3-2

Cleaning Steel Surfaces ...................3-4

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

Cleaning Honeycomb.................... 3-5

Cleaning Power Plug .................... 3-6

Cleaning Drain Evaporation System ....... 3-6

Changing Moisture Wicking Plates ........ 3-6

Night Curtain ......................... 3-8

SERVICE

“In Case of the Following” ............... 4-1

Troubleshooting ....................... 4-2

Direct Drain .......................... 4-3

Replacement Parts List .................. 4-6

WARRANTY

P/N 9FQ-6-P110-075-00_Bv

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

REVISION HISTORY

REVISION B — ADDED PAGE 4-6

ORIGINAL ISSUE — 2021

Excessive ambient conditions may cause conden-

sation and therefore sweating of doors. Facility oper-

ators should monitor doors and ﬂoor conditions to

ensure safety of persons.

All installation and operating instructions con-

cerning the handling, moving, and use of these

merchandisers must be carefully followed to avoid

either damaging the refrigerant tubing, or increas-

ing the risk of a leak.

Case ventilation openings must be clear of any

obstructions. Do not damage the refrigerant circuit.

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 fans, heaters, thermostats

and lights.

Do not use mechanical devices or other means to

accelerate the defrosting process.

Do not use electrical appliances inside the food

storage compartments of the case.

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 clarified by the California State

government, Proposition 65 can be considered more of

a‘right to know’ law than a pure product safetylaw.

When used as designed, Hussmann believes that our

products are notharmful. 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.

August 31, 2018

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.

The safety of our customers and employees is paramount.

The precautions and procedures described in this manual

are intended as general methods for safe use of

this equipment. Please be sure to comply with the

precautions described in this manual to protect you

and others from possible harm, and follow OSHA

standards for safety.

The definitions at right are used to clarify the

magnitude and urgency of harm and damage,

considering problems arising from misuse. Relative

to their potential danger, the definitions are

divided into four parts according to

ANSI Z535 Series.

P/N 9FQ-6-P110-075-00_B1-1

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

UL LISTING

These merchandisers are manufactured to meet

ANSI/ UL 471 standard requirements for safety.

Proper installation is required to maintain the

listing.

FEDERAL / STATE REGULATION

These merchandisers at the time they are man-

ufactured, meet all federal and state/ provincial

regulations. Proper installation is required to

ensure these standards are maintained. Near

the serial plate, each merchandiser carries a

label identifying the environment for which the

merchandiser was designed for use. This model

is Type II as described below.

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.

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.

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%.

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.

INSTALLATION

Recommended operating ambient

temperature is between

60°F (16°C) to 80°F (27°C).

Maximum relative humidity is 55%.

Do NOT stand or walk on top of

merchandiser. Do not store items or

ammable materials atop the unit.

1-2 INSTALLATION

P/N 9FQ-6-P110-075-00_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

LOCATION (Continued)

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 of 2 inches of clearance

from walls, merchandisers, and any other large

objects near the merchandiser’s vented base

panels. A minimum space of 2 inches should

be left above the case. Blocking or restricting

air flow will adversely affect performance and

may damage the refrigeration system.

If the merchandiser is used or stored in a hot

spring or coastal area, it may be damaged (due

to sulfur or salt). If the intention is to install

the merchandiser in any of the above areas or

locations, contact the supplier or dealer where

you purchased the merchandiser. Do not lay

the case sideways to move the case. This may

cause damage. Case should be installed on a

flat, level floor.

After installation, fix the case in place with the

leveling legs (case option) to make sure that it

does not move. Or if the case has casters, lock

the casters.

Do not store items or ammable

materials atop the unit.

DANGER

CAUTION

WARNING

NOTE

STOP STOP

IMPORTANT

ATTENTION

INSTALLER

NOTICE

Leveling Legs or Casters

Ground wire

Air inlet

Do not block this inlet

or the merchandiser

will not cool properly

2-inch

Air Exhaust

Clearance

from Wall

(Optional)

Hanging

Wall

Floor

2-inch gap

required

(51 mm)

2-inch gap

required

(51 mm)

Wall

P/N 9FQ-6-P110-075-00_B1-3

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

Part names

Electrical controls box

Bracket

Shelf

The slots that hold the left

and right shelf brackets are

located at 0.59 inch intervals.

The shelf position can thus

be adjusted to match the

size of the product stored.

Model MDN4775BA/SA shown

Tag molding

Deck pan

Front panel

Hussmann logo

Lamp switch

Controller

Main Switch

Overow drain pan

RTN400 Page 17/130

KDEPLUS BUTTONS

The KDEPlus keyboard has 4 keys, as shown in the illustration:

Each key has a different function depending on whether it is:

• Pressed and released

• Pressed for at least 5 seconds

• Pressed and held at start-up

• Pressed in combination with another key.

KEYS

The following table summarizes the function of each key:

No Key Action

Pressed and released Press for at least 5 secs Start-up

1• Scrolls through menu items

• Decreases values

Activates the Manual Defrost function

(from outside menus). ---

2• Scrolls through menu items

• Decreases values

Function can be configured by the user

(from outside menus).

(see parameter H32)

---

• Returns to the previous menu

level

• Confirms parameter value

Activates the Stand-by function

(from outside menus). ---

4set

• Displays any alarms

(if active)

• Opens Machine Status menu

• Confirms commands

Opens the Programming Menu

(User and Installer parameters)

When pressed during

start-up it enables

the user to select the

application to be loaded.

STANDBY or ESC

DOWN SET

1-4 INSTALLATION

P/N 9FQ-6-P110-075-00_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Part names

Additional parts

Model MDN4775BA/SA~ shown

Night Curtain

(Optional)

LED lamp

Honeycomb

The honeycomb adjusts

the air ow.

Discharge air outlet

Do not block this outlet with

product, or the merchandiser

will not cool properly.

Return air inlet

Do not block this inlet with

product, or the merchandiser

will not cool properly.

Caster

Condensing unit

Overow drain pan

Night Curtain

hook (Optional)

Handrail

Condenser fan

Evaporator fan

Single-phase

208V

power cord

NEMA L6-20P

Air inlet

Do not block this inlet

or the merchandiser

will not cool properly

Appearance Quantity

1pc

Name

Overow drain pan

Air Outlet

P/N 9FQ-6-P110-075-00_B1-5

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

MODEL DESCRIPTION

The MDN models are open, vertical, medium

temperature display merchandisers. They are

self contained merchandisers with their own

condensing unit. Each self contained model

has a condensing unit that is factory installed

beneath the display area of the case. The unit

is ready for operation when electrical service

is connected. See Section 2 for electrical

information before starting the case.

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:

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.

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.

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 or flammable

materials 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 attached braces and/or skids.

DO NOT TILT MERCHANDISER ON ITS

SIDE OR END WHEN REMOVING SKID.

The case is equipped with casters for ease of

installation and transportation inside store.

Check floor where cases are to be set to see if

it is a level area. Determine the highest part of

the floor.

THERMOMETER

The cabinet has a “pencil” type thermometer

and reads from -40º F to 120º F / -40º F to 50º F

on 2º increments. The thermometer is located

in the packout kit inside of the merchandiser.

It should be placed and left inside the bottom

front interior compartment during normal

operation of the merchandiser.

Serial Plate

Do NOT remove shipping crate until the

merchandiser is positioned for installation.

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