Master-Bilt QMVM-72E Operators Manual

Installation & Operations Manual for

QMVM-L SERIES

Open Display Merchandisers

PN 57-01436

Rev 5-24-11

2

TABLE OF CONTENT

INTRODUCTION………………………………….……………………………………………………………………3
STORE CONDITIONS / LOCATION ………….……………….…..………………………………………………. 3
WARNING LABELS AND SAFETY INSTRUCTIONS………..…..……………………………………………….4
PRE-INSTALLATION INSTRUCTIONS………………………..…..………………………………….…………… 4

Inspection for Shipping Damage……………………………………………………………….…………. ..4

INSTALLATION INSTRUCTIONS………………………………………………………………………………….. 5

General Instructions…………………………………………………………………………………………. 5
Thermometer Installation…………………………………………………………………………………… 5
Location………………………………………………………………………………………………………..5
Plumbing……………………………………………………………………………………………………….5

ELECTRICAL……..…………………………………………………………………………..……….……………….6
STARTING PROCEDURE…………………………………………………………………………………………….6
FINAL CHECK LIST…………………………………………………………………………………….……………..6
LOADING………………………………………………………………………………………………………………..7
PLACING PRODUCT IN CABINET ………………………………………………………………………………….7
CLEANING………………………………………………………………………………………………………………7
ELECTRONIC TEMPERATURE CONTROL ……………………………………………………………………….8

Fan……………………..……………………………………………………………………………………….8
Defrost…………………………………………………………… …………………………………………….8
Manual Defrost ……………………………………………………………………………………………….8

Setpoint.……………………………………………………………………………………………………….8
List Of Parameters……………………………………………………………………………………………9
How to change parameters…………………………………………………………………………………9

Alarm Buzzer and Signals..…………………………………………………………………………………9
ELECTRICAL CONNECTIONS……………………………………………………………………………… ..……...10
PROBE CONNECTIONS…………………………………………………………………………………… ..………..10
SENSOR PROBE TEMPERATURE AND RESISTANCE………………………………………………..………...10
SERVICE INSTRUCTIONS (Trouble Shooting Guide)………………………………………………… ..……….11
MASTER-BILT PART NUMBERS………………………………………………………………………… ..………..12
ACCESSORIES LIST……………………………………………………………………………………… ..…………13
SALE AND DISPOSAL…………………………………………………………………………………… ..……….…13

QMVM-36L, 48L WIRINGDIAGRAM ………………………………………….…………………………....……14-15

QMVM-36E WIRING DIAGRAM……………………..……………………………….…………..….….….……..16-17
QMVM-48E WIRING DIAGRAM…………………………..…………………………….…………………………18-19
QMVM-72E WIRINGDIAGRAM……………………….………….…………………………………….…….……20-21

3

INTRODUCTION

Thank you for purchasing a Master-Bilt cabinet. This manual contains important instructions for installing, using and
servicing a Master-Bilt QMVM series open air case. Read all these documents carefully before installing or servicing
your equipment. This manual should be left in the care of the store owner or manager.

STORE CONDITIONS / LOCATION

The Master-Bilt QMVM 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.

The Master-Bilt QMVM should not be positioned where it is directly exposed to rays of the sun or near a direct source
of radiant heat or air flow. No HVAC return or supply air ducts may be located near case openings. This will adversely
affect the case air flow and will result in poor performance. Do not open windows or doors that will affect the case air
flow. The maximum air velocity near the case air return is 50 FPM. If this case is to be located against a wall there
should be at least a 6” space between the wall and the back of the case. The cabinet also requires a clearance of 10”
at the top. This space will allow for the circulation of air behind the case.

These cases should always be loaded properly. This unit will operate differently when loaded or unloaded. Consult
the section of this manual that specifies loading procedures on page 6.

A P-trap is included with each case. It is important that each case has a P -trap installed. Consult the section of this
manual for installing and piping the drain.

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.
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 portion 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, call or write
us:

Customer Service Department
Master-Bilt Products
Highway 15 North
New Albany, MS 38652
Phone [phone]
Fax [phone]

4

CAUTION!

GROUND REQUIRED

FOR SAFE OPERATION

WARNING LABELS AND SAFETY INSTRUCTIONS

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 Master -Bilt Products
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 [phone] for replacements.

This label is located on the electrical control This label is attached to the cabinet power cord on

box and on the rear access cover. models with a power cord.

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 lading (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.

5

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. Wipe up all spills, clean with
water and a mild detergent, then rinse with clean water. A reservoir is provided to contain inner spills. Peridocially
inspect reservoir and clean as needed.

3. Rotate your stock so that older stock does not accumulate. A "First-In, First-Out" rotation practice will keep the
products in good salable condition.

4. Product should not be put in the case for at least 2 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 fluorescent tubes, be sure that the electrical power to the lighting circuit is turned off.

INSTALLATION INSTRUCTIONS

To comply with Sanitation requirements, this cabinet must be mounted on casters, legs (6” high min.) or the base
must be sealed to the floor with NSF listed silicone sealant. Minimum clearance as follows: 10” air space at top, 6” at
the rear, and 0” air space at each side required for compliance.
Before moving cabinet into place, route cabinet plumbing with P-trap to store drain line or install optional condensate
pan.

THERMOMETER INSTALLATION

Install provided thermometer at the clip on the price tag moulding near the top left edge of the case. Remove the tape
backing and press the thermometer in place.

PLUMBING

Each QMVM case has a P-trap installed. It is very important that this trap not be removed as it will result in
diminished peformance of the case without it.

1. Always install drains in accordance with local codes.

2. Use largest possible size pipe for drains, ¾” minimum is recommended.

3. Provide as much downhill slope as possible.

4. Prevent drains from freezing. Do not install drains in contact with uninsulated suction lines.

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 Master-Bilt cabinet, an immediate investigation should be made by
qualified personnel to determine the source of the moisture or liquid. The investigation made should determine if the
cabinet is malfunctioning or if there is a drain pipe leaking.

6

ELECTRICAL

WARNING

Before servicing electrical components in the case make sure all power to case is off. Always use a qualified
technician.

STARTING PROCEDURE

1. Start compressor and allow the case to pull down to 42 degrees or below before placing product into the

QMVM.

DURING THIS TESTING PERIOD YOU SHOULD:

1. Check that the compressor cycles off and back on at least once.

FINAL CHECK LIST

A. Check that the evaporator drain line is properly connected.

B. All shelves are properly installed.

B. Check electrical supply voltage to make sure it is in range.

C. All loose items and debris is removed from inside of unit and lower equipement compartment.

D. Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.

E. All valves should be completely open counter-clockwise.

F. Check packing nuts on all service valves.

G. Replace all service valve caps and latch unit covers.

I. Check that the temperature of the case is between 35 and 42 degrees.

7

LOADING

Do not place product in the case until 2 hours after it
is started. Stock cases as quickly as possible,
exposing only small quantities to store temperatures
for short periods of time. It is important to keep stock
rotated properly so that older stock does not
accumulate. A “First-In, First-Out” rotation practice
will keep the products in good salable condition.
Avoid loading the case so that product sticks out
beyond the shelves or blocking the return air grille at
the bottom of the case. This will interfere with the air
flow of the case and will result in diminished
performance.

PLACING PRODUCT IN THE CABINET

Do not load the cabinet with product to the point that the air discharge grille, air intake grille, or the air curtain created
by the discharge air, is blocked. The following diagram shows proper loading.

All units come with 14” shelves sufficient to have 3 levels.

CLEANING

To avoid electrical shock, turn the power off before cleaning.

The QMVM series cabinets are designed so that spills will accumulate in a drain pan. The drain pan is located
underneath the return air grill. Be sure to clean all areas with a mild detergent and water periodically.

8

MASTER-BILT ELECTRONIC REFRIGERATION CONTROL

Display Lay -out

Compressor When power is first turned on to the control, the LED indicator under COMP on the display starts
blinking. After one-minute delay the compressor comes on. The LED indicator stays on while compressor relay is
energized. Display will show actual box temperature. Picture above is the display layout. The compressor will be
cycled off when the actual box temperature reaches its set point. The COMP indicator will be off.

Fan The fans will run constantly during cool mode and defrost mode, or when the evaporator temp is above 55oF.
FAN LED indicator is on while FAN relay is energized.

Defrost The control uses time defrost with 6 defrost per day. The defrost scheme can be re-set the for special
applications. During defrost the display will show dEF and the defrost LED indicator on. The control begins timing the
defrost when power is turned on. Four defrost per day means it will occur every 4 hours.

MANUAL DEFROST

Defrosting my also be induced manually by keeping the defrost button for 3 seconds. Once defrost has started, the
defrost will go through a defrost and drip time pull down cycle.

9

HOW TO CHANGE THE SETPOINT

HOW TO CHANGE a parameter value

LIST OF PARAMETERS

Here is a list of the parameters the value of which can be changed in the programming mode, as well as their ranges.

Display
Symbol

Parameter

Range

Master-Bilt’s

Setting

SP

Temperature Set Point

SPL…SPH

30°F

HYS

Temperature Differential

1 to 255°F

5°

SPL

Minimum Temperature limit setpoint

-50…SPH

27°F

SPH

Maximum Temperature limit setpoint

SPH…120°

55°F

AHA

High Temperature alarm

-50…120°

60°F

ALA

Low Temperature Alarm

50…120°

0F

ATD

Temperature Alarm Delay

0…120min

30min

DFR

Number of Defrost Cycle per 24hr

0…24

6/day

DLI

Defrost Termination Temperature

-50…120°

55°F

DTO

Maximum Defrost Duration

1…120min

30min

ELECTRICAL CONNECTIONS

The controller is provided with screw/push terminal block to connect cables with a cross section up to 2,5 mm2. Before
connecting cables make sure the power supply complies with the control’s requirements. Separate the probe cables
from the power supply cables, from the outputs and the power connections. Do not exceed the maximum current
allowed on each relay, in case of heavier loads use a suitable external relay or contactor’s.

PROBE CONNECTIONS

The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average room
temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most ice is
formed, far from heaters or from the warmest place during defrost, to prevent premature defro st termination.

10

SENSOR PROBE TEMPERATURE AND RESISTANCE

NTC10K Temperature-Resistance

Temp (ºC)

Temp (ºF)

R-low (Kohm)

R-center (Kohm)

R-high (Kohm)

-40

-40

188.021

195.652

203.573

-35

-31

142.788

148.171

153.741

-30

-22

109.522

113.347

117.294

-25

-13

84.823

87.559

90.374

-20-466.270

68.237

70.255

-15552.229

53.650

55.104

-101441.477

42.506

43.557

-52333.147

33.892

34.651

03226.678

27.219

27.767

54121.630

22.021

22.417

105017.643

17.926

18.210

155914.472

14.674

14.877

206811.938

12.081

12.224

25779.900

10.000

10.100

30868.217

8.315

8.413

35956.854

6.948

7.043

40

104

5.745

5.834

5.923

45

113

4.834

4.917

5.001

50

122

4.084

4.161

4.239

55

131

3.464

3.535

3.607

60

140

2.949

3.014

3.081

65

149

2.526

2.586

2.647

70

158

2.173

2.228

2.283

75

167

1.875

1.925

1.976

80

176

1.623

1.669

1.715

85

185

1.411

1.452

1.495

90

194

1.230

1.268

1.307

95

203

1.075

1.110

1.145

100

212

0.942

0.974

1.006

105

221

0.829

0.858

0.888

110

230

0.732

0.758

0.785

115

239

0.647

0.671

0.696

120

248

0.574

0.596

0.619

125

257

0.511

0.531

0.552

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SERVICE INSTRUCTIONS (Trouble Shooting Guide)

1. High head pressure and high back pressure:

A. Condenser coil clogged or restricted.
B. Condenser fan motor defective.

2. Low back pressure and low head pressure:

A. Restriction in system.
B. Refrigerant undercharged.
C. Leak in system.

3. Pressures normal – cabinet warm:

A. Coil blocked with frost or ice (see #4).
B. Control set too warm.
C. Air screen disturbance.

4. Coil blocked with frost or ice:

A. Defective temperature contro
B. Defective or disconnected coil sensor.
C. Improper control setting.
D. Defrost heater not operating.
E. Ambient conditions above 75 F/55
F. P-trap in train not installed.
G. Evaporator fan motor defective.
H. Air screen disturbance.

5. Compressor starts and runs – but cycles on overload:

A. Low voltage.
B. Dropped phase (3 phase).
C. Overload protector defective.
D. High head pressure (see#1).
E. Relay or Capacitor defective.

6. Compressor will not start – hums, but cycles on overload.

A. Low voltage.
B. Relay defective.
C. Overload protector defective.
D. Start capacitor defective.
E. High head pressure (see #1)

MASTER-BILT PART NUMBERS

Description

QMVM-36E

QMVM-48E

QMVM-72E

Shelves and overhead Ballast

23-01709

23-01709

23-01704

Compressor

03-14494

03-14762

03-14480

Condenser Coil

07-13226

07-13195

07-13197

Condenser Fan Blade

15-13097

15-13081

15-13090

Condenser Fan Motor

13-01283

13-13121

13-13121

Contactor

N/A

19-00792

19-00792

Defrost Heater

17-09251

17-09205

17-09206

Thermometer

44-01033

44-01033

44-01033

Drier

09-09506

09-09506

09-09506

Evaporator Coil

07-13225

07-13188

07-13186

Evaporator Fan Blade

15-13106

15-13084

15-13084

Evaporator Fan Motor

13-13114

13-13114

13-13114

Expansion Valve

09-09553

09-09553

09-09553

Female Plug

21-00568

21-00568

21-00568

Flourecent Lamp, 18”

23-00329

23-00329

Flourecent Lamp, 24”

23-01507

Flourecent Lamp, 36”

23-00325

Flourecent Lamp, 60”

23-00360

Front Glass

31-02270

54-01434

54-01435

Heater Safety Switch

19-01307

19-01307

19-01307

Lampholder

23-50562

23-01128

23-50562?

Light Switch

19-01071

19-01071

19-01071

Receiver Tank

N/A

09-01162

09-01162

Refrigerant

30 oz.(404A)

88 oz.(404A)

102oz.(404)

Shelf Power Cord

21-01278

21-01278

21-01278

Electronic Controller

19-14242

19-14242

19-14242

Box Sensor T1

19-14244

19-14244

19-14244

Evaporator Sensor T2

19-14245

19-14245

19-14245

The table below gives Master-Bilt part numbers. Use this chart when ordering replacement parts for your QMVM
cases.
All quantities are one each unless otherwise noted by parentheses.

12

ACCESSORIES LIST

Description

QMVM-36

QMVM-48

QMVM-72

Extra Shelves

14” Lighted Shelf (White)

A068HW214

A075HW214

A076HW214

14” Non-Lighted Shelf (White)

A068DW114

A075DW114

A076DW114

14” Lighted Shelf (Black)

A068HB214

A075HB214

A076HB214

14” Non-Lighted Shelf (Black)

A068DB114

A075DB114

A076DB114

14” Lighted Shelf (Stucco Black)

A068HP214

A075HP214

A076HP214

14” Non-Lighted Shelf (Stucco Black)

A068HP114

A075HP114

A076HP114

14” Lighted Shelf (Seville White)

A068HQ214

A075HQ214

A076HQ214

14” Non-Lighted Shelf (Seville White)

A068HQ114

A075HQ114

A076HQ114

14” Lighted Shelf (Seville Black)

A068HR214

A075HR214

A076HR214

14” Non-Lighted Shelf (Seville Black)

A068HR114

A075HR114

A076HR114

Product Hook Assembly

bar, shelf brackets, 6” hooks

A068-15000

A075-15000

A076-15000

6” extra hooks

44-01016

44-01016

44-01016

Condensate Evaporator Drain Pan

17-09287

17-09264

17-09264

Condensate Pump

61-00529

Casters

Set of four, 3” diameter

A075-11140

A075-11140

Set of six, 3” diameter

A076-11140

SALE AND DISPOSAL

OWNER RESPONSIBILITY

If you sell or give away your Master-Bilt 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, Master-Bilt will provide them free. Contact
the customer service department at Master-Bilt at [phone].

The customer service department at Master-Bilt 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 Master-Bilt cabinet and you evacuate the refrigerant charge before shipment, Master-Bilt
recommends that the refrigerant charge be properly recovered in complience with section 608 of the Clean Air Act
effective November 1995 and in accordance with all applicable local, regional, or national standards.

13

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