Hussmann MBC Guide rapide

January 2006

HUSSMANN - GLOVERSVILLE

INSTALLATION & SERVICE

INSTRUCTIONS

FOR

MBC MULTI-DECK

GONDOLA INSERT

P/N OII – MBC

January 2006

First Call for help (US and Canada):

1-800-922-1919

Soporte Tècnico y Asistencia (Mèxico):

01-800-522-1900

For a Service Network Locator and other

Information visit us at

www.hussmann.com

select Worldwide Locations

SETTING MBC TEMPERATURE CONTROL

1. Hold down top button until R-1 appears

2. Go to R-5, push both buttons, set to F, push both again

3. Go to D=3, push both buttons, set to 6, push both again

4. Go to D-4, push both buttons, set to 30, push both again

5. Go to R-1, push both buttons, set to 8, push both again

6. Go to R-2, push both buttons, set to 45, push both again

7. Go to R-3, push both buttons, set to 30, push both again

Wait for actual temperature to appear. Push both buttons and set to 32.0. Push both

again. Push both a third time and let flash until it stops flashing.

TABLE OF CONTENTS

Model Description Page 4

Application Page4

Inspection upon Receipt Page 4

Shipping Page 4

Leveling Page5

Location Page5

Rear Close-Off Panel Page 5

Condensate Removal – Self Contained Page 5

Installing drip piping – Remotes Page 5

Exterior loading, Interior loading Page 6

CareandCleaning Page6

Electrical Page7

Refrigeration, Expansion Valve Adjustment, Refrigerant Page 7-8

Multiplexing, Line Sizing, Oil Traps, Pressure Drop Page 8

Insulation Page9

Controls and Adjustments Page 9

Temperature Controls Page 10

EKC Controls and Info Page 13

Controller Application setting parameters (if needed) Page 14

Warranty and Parts Information Page 11

Compressor Replacement Procedure Page 11

MODEL DESCRIPTION –

This instruction manual covers the mer-

chandisers listed below. All models are available

in 36” or 48” lengths.

MBC –Self-Contained Self Service

Beverage Case

MBCR –Remote Self Service Beverage

Case –Remote case requires a separate

condenser unit connection.

APPLICATION -

The MBCR and MBC refrigerated mer-

chandisers are designed for use only in air condi-

tioned stores where temperature and humidity

are maintained at or below 75ºFdrybulbtem-

perature and 55% relative humidity.

These Beverage Cases are intended for the

storage and display of non -potentially hazardous,

bottled or canned products only.

INSPECTION UPON RECEIPT–

All equipment should be thoroughly exam-

ined for shipping damage before and during un-

loading. This equipment has been carefully in-

spected at our factory and the carrier has as-

sumed responsibility for safe arrival.

If damage, either apparent or concealed, is

found a claim must be submitted to the carrier.

Apparent Loss or Damage –If there is ob-

vious loss or damage, it must be noted on the

freight bill or express receipt and signed by the

carrier’s agent; otherwise, the carrier may refuse

the claim. The carrier will supply necessary

forms.

Concealed Loss or Damage –When loss

or damaged is not apparent until after equip-

ment is uncrated, a claim for concealed damage

is made.

Upon discovering damage, make a re-

quest in writing to the carrier for inspection

within 15 days and retain all packing. The car-

rier will supply the inspection report and re-

quired claim forms.

SHIPPING –

Move the fixture as close as possible to

its permanent location and then remove all

crating. Check for damage before discarding

packing. Remove all separately packed accesso-

riessuchaskitsandshelves.

LEVELING –

Merchandisers must be installed level to

ensure proper operation of the refrigerant sys-

tem and to ensure proper drainage of defrost

water.

Levelers are shipped with the case and

should be installed in the same holes that the

skid bolts were installed in.

Place pry-bar under metal base and lift. DO

NOTLIFT END PANEL. Turn leveler, with

wrench clockwise to raise, and counter clock-

wise to lower. Repeat process with other level-

ers until case is level.

NOTE: To avoid removing concrete flooring,

begin lineup leveling from the highest point of

the store.

LOCATION –

Like other open merchandisers, these are

sensitive to air disturbances. Air currents pass-

ing around merchandisers will seriously impair

their operation. Do NOT allow air conditioning,

electric fans, open doors or windows, etc. to cre-

ate air currents around the merchandisers.

REAR CLOSE-OFF PANEL –

To perform electrical and refrigeration

work, remove the rear closure panel by removing

the sheet metal screws. Replace when work is

complete.

NOTE: Self Contained Models-Do note block

the vent openings on the rear closure panel.

These allow intake and exhaust air for the con-

densing unit. Vents only appear on self-

contained models.

CONDENSATE REMOVAL –Self Contained

On the self contained merchandisers the

waste outlet is centrally located and accessible

from the rear of the case.

The condensate water from the evaporator

drains out through the bottom of the evaporator

compartment into the condensing unit area into

a heated condensate pan.

The pan has a float that activates the

heater when sufficient water is in the pan.

INSTALLING DRAIN PIPING –Remotes

Poorly or improperly installed drip pipes

can seriously interfere with the merchandisers’

operation and result in costly maintenance and

product losses. Please follow the recommenda-

tions listed here when installing drip pipes to en-

sure proper installation.

1. Never use drip piping smaller than the

nominal diameter of the pipe or water

sealsupplies with the merchandiser.

2. Whenconnecting drip piping, the “water

seal” must be used as part of the drip pip-

ing to prevent air leakage or insect en-

trance. Never use two water seals in series

in any one drip pipe. Double water seals

in series will cause an air lock and prevent

draining.

3. Pitch the drip piping in the direction of

flow. There should be a minimum pitch of

1/8” per foot

4. Avoid long runs of drip piping. Long runs

make it impossible to provide the pitch

necessary for good drainage.

5. Provide a suitable air break between flood

rim of the floor drain and outlet of drip

pipe.

6. Prevent drip pipes from freezing:

a. Do not install drip pipes in contact

with insulated suction lines. Suction

lines should be insulated with a nonab-

sorbent insulation material.

b. When drip pipes are located in dead

air spaces, such as between merchan-

disers or between a merchandiser and

a store wall, provide means to prevent

freezing.

EXTERIOR LOADING –

Do NOT walk on top of merchandiser or

damage to the merchandiser and serious personal

injury could occur. They are not structurally de-

signed to support excessive external loading such

as the weight of a person.

INTERIOR LOADING –

In order to maximize product life, main-

tain a constant and proper product temperature

from the time the product is received through

storage, preparation and display.

Products should not be placed in merchan-

disers until all refrigeration controls have been

adjusted and merchandisers are at proper oper-

ating temperature. Again,air discharge and re-

turn air flue MUST be unobstructed at all times

to provide proper refrigeration.

CARE and CLEANING –

Long life and satisfactory performance of

any equipment is dependent upon the care it re-

ceives. To ensure long life, proper sanitation and

minimum maintenance costs, 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. NEVER use

abrasive cleansers or scouring pads.

CAUTION –Shut power off during cleaning.

DO NOT USE –

•Mineral oil based solutions, as these will dis-

solve the butyl sealants used in the construc-

tions of the merchandisers.

•Abrasive cleansers and scouring pads, as

these will mar the finish.

DO –

•Remove the product and all loose debris

to avoid clogging the waste outlet.

•Thoroughly clean all surfaces with soap

and hot water. Do NOT use steam or

high water pressure hoses to wash the

interior. These will destroy the mer-

chandisers’ sealing causing leaks and

poor performance.

•Rinse with hot water but do NOT flood.

Never introduce water faster than the

waste outlet can remove it.

NOTE –Self-contained Models

The evaporator pan must be moni-

tored for overflow conditions. Provide

drainage if necessary. After cleaning and

rinsing, purge the pan of any standing w a-

ter.

•Care should be taken to minimize direct

contactbetween fan motors and cleaning

or rinse water.

•Allow the merchandisers to dry before

resuming operation.

At the back of this booklet there is a supple-

ment for sealing and cleaning of this unit.

Please read for further instructions.

ELECTRICAL –

•Self-Contained Model Installation –Mer-

chandisers need only to be connected to a

120V / 60 hz electrical supply., and are sup-

plied with a 20 amp cord.

•Post Construction Clean-up –After the first

two weeks of a major store remodel or new

store operation, the grill should be removed

and the condensing unit and condenser face

cleaned due to the accumulated dirt and de-

bris generated during construction.

•Remote Model Installation –Connections –

All wiring must be in compliance with NEC

and local codes. Electrical connections for

refrigerated models are made in the electri-

cal box on the back of the case behind the

rear close-off panel.

•Field Wiring –Field wiring must be sized

for components amperes stamped on the se-

rial plate. Actual ampere draw may be less

than specified. Always check the serial

plate.

Evap Fan Light Condensate

Condensing

Minimum

Fuse

Model Amps Amps Pan Amps Unit Amps Circuit

Amps Amps

Refrigerant ( * ) R-22 R-404A

R-22 R-404A

MBC24-3661/74 0.38 0.15 5.0 10 9.2 16 14 20

MBC24-3684 0.38 0.35 5.0 10 9.2 16 14 20

MBC243661R/74R 0.38 0.15 N/A N/A N/A 15 15 15

MBC243684R 0.38 0.35 N/A N/A N/A 15 15 15

MBC24-4861/74 0.57 0.20 5.0 10 10.1 16 16 20

MBC24-4884 0.57 0.44 5.0 10 10.1 16 16 20

MBC244861R/74R 0.57 0.20 N/A N/A N/A 15 15 15

MBC244884R 0.57 0.44 N/A N/A N/A 15 15 15

Check Serial Plate for Refrigerant type and amount used. Self-Contained cases were changed from R-22 to

R-404a starting September, 2001.

REFRIGERATION –

Expansion Valve Adjustment

Expansion valves must be adjusted to fully feed the evaporator. To achieve the

proper setting, the merchandiser must first have been in operation long enough to have

reached the approximate intended operating temperature. Air flow should not be

restricted by heavy frost formation on the evaporator. Adjust valves as follows:

Attach two sensing probes (either thermocouple or thermistor) to the evaporator. One

under the clamp holding the expansion valve bulb and the other securely taped to the

evaporator inlet line as close to the coil as practical.

Some “hunting” of the expansion valve is normal. The valve should be adjusted so that

during the hunting the greatest difference between the two probes is 3º-5ºF for remote

merchandisers. With this adjustment, during a portion of the hunting the temperature

difference between the probes will be less than 3ºF (at times as low as 0ºF). Make

adjustments of no more than one-half turn of the valve stem at a time and wait for at least

15 minutes before rechecking the probe temperature and making further adjustments.

Self-contained merchandiser should be adjusted using the same technique with a

temperature difference of 6º to 8ºF.

REFRIGERANT–

The correct type of refrigerant will be stamped on each merchandiser’s serial plate

located inside the merchandiser.

Refrigerant Piping –(Remote Cases)

Connection Sizes Liquid Line 1/4” OD

Suction Line 3/8” OD

The refrigerant line connections are behind the rear close-off panel, underneath the

drain tub, on the left hand end of the merchandiser as viewed from the rear.

After connections have been made, seal this outlet thoroughly. Seal both inside and

outside. We recommend using an aerosol dispensed urethane type of insulation.

Multiplexing -

Piping of remoted merchandisers operating on the same refrigeration system may

be run from merchandiser to merchandiser through the end frame saddles provided for

this purpose

DO NOT RUN REFRIGERANT LINES THROUGH MERCHANDISERS THAT ARE

NOT ON THE SAME REFRIGERANT SYSTEM -as this may result in poor

refrigeration control and compressor failure.

Line Sizing –

Refrigerant line should be sized as shown on the refrigeration legend that is

furnished for the store (not furnished by Hussmann). If a legend has not been furnished,

refer to Hussmann Application Engineering Manual for guidance.

Oil Traps –

P-Traps (oil traps) must be installed at the base of all suction line vertical risers.

Pressure Drop–

Pressure drop can rob the system of capacity. To keep the pressure drop to a

minimum, keep the refrigerant line run as short as possible using a minimum number of

elbows. Where elbows are required, use long radius elbows only.

Insulation–

The suction and liquid lines should be clamped or taped together and insulated for a

minimum of 30’ from the merchandiser. Additional insulation is recommended wherever

condensation drippage is objectionable.

CONTROLS and ADJUSTMENTS –

The object of the controls and settings listed in this section is to maximize product

shelf life.

TEMPERATURE CONTROLS –

Discharge Air Temperature F 32

Evaporator Temperature F 20

Refrigerant Controls

Thermostat Cut-out F 32

Defrost Controls

Frequency (Qty per day) 4

Length of defrost (min) 30

ELECTRONIC CONTROLLERS –

On page 13 at the end of this booklet.

The control is factory set and should not need Field adjustment. If they do, use the

Quick Guide on the next page for reference.

SHELVING-

The MBC models come equipped with shelves. They are adjustable on one inch

increments. When loading the shelves with product, they should be loadedso that the

product does not extend over the front edge of the shelf. Product loaded over the edge will

interfere with air circulation in the cabinet. It is also desirable to leave a small space

between the rear interior wall and the product on the shelves to allow air to enter the

cabinet interior through the perforations in the rear wall.

The shelves are rated for 130 pounds each load capacity. When installing the

shelves, first install the shelf support bracket at the desired height. Place the rear of the

bracket in the desire slot. Raise the front of the bracket towards the rear of the cabinet.

Once the ends are in the slot, rotate the bracket forward locking it in place. Place the shelf

on the bracket. Load the product. The shelves are not to be slanted. They must remain in

a horizontal position.

QUICK GUIDE REFERENCE –At the end of the booklet on page 14

Controller application setting parameters

Settings and read-off parameters Parameter

Codes

Temperature controller, Temperature

Thermostat

Differential r01

Max. limitation of set temperature r02

Min. limitation of set temperature r03

Adjustment of temperature indication r04

Temperature unit (ºC/ºF) r05

Defrost

Interval between defrost starts d03

Max. defrost duration d04

Temperature alarm delay after defrost d11

Delay of display view after defrost stop d12

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