Master-Bilt BMG-27 Service Manual

BMG/TMG Series

Installation & Operations Manual

I - Version

Master-Bilt Products

908 Highway 15 North

New Albany, MS 38652

PN 075-90000

Rev 10-18-05

By: LN

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Phone: [phone]

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TABLE OF CONTENTS

INTRODUCTION………………………………….……………………………………………………………………4
STORE CONDITIONS…………………………….……………….…..…………………………………………….. 4
WARNING LABELS AND SAFETY INSTRUCTIONS………..…..……………………………………………… 5
PRE-INSTALLATION INSTRUCTIONS………………………..…..………………………………….…………… 6
Inspection for Shipping Damage…………………………………………………………….…………… 6
INSTALLATION INSTRUCTIONS………………………………………………………………………………….. 6

General Instructions…………………………………………………………………………………………. 6
Mechanical ..…………………………………………………………………………………………………..6
Electrical…………...…………………………………………………………………………………………..7
Temperature Control…… ………………………….………………………………………………………..7

Leg and Condensate Pan Installation..……………………………………………………………………..7

Doors ..…………....…………………………………………………………………………………………...8

SERVICE INSTRUCTIONS …………………………………………………………………………………………8
TEMPERATURE CONTROL AND FAN MOTOR REPLACEMENT……………………………………………..9
FINAL CHECK LIST…………………………………………………………………………………….……………..9
MASTER-BILT PART NUMBERS ………………………………………………………………………………...10
ACCESSORIES …………………………………………………………………………………………………...10
SALE AND DISPOSAL …………………………………………………………………………………………….11
WIRING DIAGRAMS BMG/TMG...……………………………………….……..……………….………………12-14

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INTRODUCTION

Thank you for purchasing a Master-Bilt cabinet. This manual contains important instructions for installing, using, and
servicing a Master-Bilt BMG/TMG case. A parts list is included with this manual. Read all these documents carefully
before installing or servicing your equipment.

STORE CONDITIONS

The Master-Bilt BMG/TMG 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.

The Master-Bilt BMG/TMG should not be positioned where it is directly exposed to rays of sun or near a direct source
of radiant heat or airflow. This will adversely affect the case and will result in poor performance.

If this case is to be located against a wall, there should be at least 4” space between the wall and the back of the case.
This space will allow for the circulation of air behind the case, which will prevent condensation on the exterior surfaces.

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 on 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 ca binet must be performed by a
refrigeration mechanic and/or a licensed electrician.

The portions of this manual covering refrigeration and electrical components contain technical instructions intended
only for persons qualified to perform refrigeration and electrical work.
This manual cannot cover every installation, use or service situation. If you need additional information, call or write us:

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

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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 the manual. The following signal words are
used in the warnings and safety messages:

DANGER: Severe injury or death will
WARNING: Severe injury or death can
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 attached to the cabinet power cord
label and on the wiring channel. on models with a power cord.

occur if you ignore the message.

occur if you ignore the message.

CAUTION!

GROUND REQUIRED

FOR SAFE OPERATION

This label is located on top of the electrical control

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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.

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. Clean the cabinet with a mild
detergent and water, then rinse.

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

4. Do not place product in the case when it is soft or partially thawed. Also, product should not be put in the case for at
least 6 hours after it is started.

5. Stock cases as quickly as possible, exposing only small quantities to store temperatures for short periods of time.

6. When replacing burned out fluorescent tubes, be sure that the electrical power to the lighting circuit is turned off.

NOTICE TO STORE OWNERS / MANAGERS
Moisture or liquid around or under the cabinet is a potential slip/fall hazard for persons walking by or working

in the general area of the cabinet. Any cabinet malfunction or housekeeping problem that creates a slip/fall
hazard around or under the cabinet should be corrected immediately

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

MECHANICAL

Remove front grille and check refrigeration lines to see that they are free (not touching each other or compressor).
Spin condenser fan blade to see that it is free.

The compressor is hermetic, it is internally spring mounted and ready to run.
Remove cabinet from crate base and slide into location. Cabinet must be level from side to side and front to back for

correct draining of coil pan and for self-closing doors to operate correctly. Allow minimum of 4” between back of cabinet
and wall and between top of cabinet and ceiling for proper condensing unit air circulation.

To comply with Sanitation requirements the cabinet must be mounted on legs (6” high min.) or casters or the base must
be sealed to the floor (BMG) with an N.S.F. listed silicone sealant.

Hang provided NSF Listed thermometer at front of top shelf unless cabinet provided with electronic control.

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ELECTRICAL

WARNING

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

NOTICE

For models with electronic ballast only:

For replacement ballast, use only ballast that complies with UL Type CC rating
if unit is equipped with electronic ballast.

Check voltage and amps drawn on (Page 12-15) to determine proper line and fuse or circuit breaker size. Check power
supply for low voltage. If voltage reads “230” with no load, and it drops below “207” when the compressor tries to start, it
is an indication of too small supply wiring or too long to run.

It is recommended that a separate circuit be run for each cabinet to prevent another appliance blowing the fuse or
breaker, causing loss of product.

IMPORTANT

This cabinet is pre-wired internally for separate 115 and 230-volt circuits. “Tapping” or feeding the 115-volt circuit from
230-volt supply may result in overloaded circuit breakers or blown fuses and damage to electrical system, thereby
voiding the warranty.

The cabinet should be grounded.
TEMPERATURE CONTROL

The BMG/TMG cabinet has a temperature control that is adjustable from #1
(warmest setting) to #7 (coldest setting). All the above controls are
accessible by opening the left-hand door.

LEG AND CONDENSATE PAN INSTALLATION FOR TOP MOUNT
CABINETS ONLY

Temperature

Control

1. Screw legs into existing crate mounting
holes.

2. Mount pan and bracket assembly to rear
of cabinet with 2 large sheet metal screws

(supplied). Be sure pan is located directly

under cabinet drain

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DOORS

The BMG/TMG cabinets have Anthony glass doors
that are equipped with a patented TorqueMaster™
hinge system. The doors are easily adjusted using
a flathead screwdriver (Fig.3).

Leveling Adjustment

Torque Adjustment

Figure 3

Figure 4
To remove the door shipping clamps,
remove the 4 shipping screws from the grill and
remove the screws from the clamps (Fig.4), and
replace grill.

SERVICE INSTRUCTIONS

1. High head pressure and high back pressure:
A. Condenser coil clogged or restricted
B. Condenser fan motor defective.
C. Air discharge in rear of cabinet restricted.

2. Low back pressure and low head pressure:
A. Restriction in system.
B. Refrigerant undercharged.
C. Leak in system

3. Pressure normal – cabinet warm:
A. Coil blocked with frost (see #4).
B. Refrigerant undercharged.
C. Control set too warm.

4. Cabinet not cycling – coil blocked with frost:
A. Defective temperature controller.
B. Refrigerant overcharged.
C. Location too hot.
D. Condenser clogged.
E. Condenser fan motor defective.

5. Compressor starts and runs – but cycles on overload:
A. Low voltage
B. Relay defective.
C. Overload defective.
D. High head pressure (see #1).

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TEMPERATURE CONTROL AND FAN MOTOR REPLACEMENT

Before making any change, technician should:

1. Disconnect power to the cabinet

2. Remove screws from venturi and pull down

To change fan motor – disconnect fan motor leads – remove screws from fan guards and motor mounts.
To change a temperature control – pull off the control knob and remove screws from the control – unplug the control

leads and replace with a new control – put screws back in control and press on control knob.

FINAL CHECK LIST

A. Check operating pressures.
B. Check electrical requirements of unit to supply voltage.
C. Set temperature control for desired temperature range.
D. Check sight glass for proper refrigerant charge if provided
E. Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.

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MASTER-BILT PART LIST

The table below gives Master-Bilt part numbers. Use this chart when ordering replacement parts for your BMG/TMG
cabinets. Always Advise Cabinet Serial Number When Ordering Parts

Description BMG/TMG-27 BMG/TMG-48 BMG/TMG-52 BMG/TMG-74 BMG/TMG-80

Accumulator 09-00812 09-00813 09-00813 09-00812 09-00812
Ballast 23-01683 23-01683 23-01683 23-01683 23-01683
Bulb 23-01575 23-01575 23-01575 23-01575 23-01575
Lamp Holder 23-50562 23-50562 23-50562 23-50562 23-50562
Capillary Tube 11-01450 11-01450 11-01450 11-01450 11-01450
Condensate Heater “B” 17-00380
Condensate Heater “T” 17-00421 17-00421 17-00421 17-00421 17-00421
Compressor “B” 03-50330 03-50330 03-50330 03-14901 03-14901
Compressor “T” 03-50330 03-50330 03-50330 03-14901 03-14901
Condensing Coil “B” 07-13253 07-13253 07-13253 07-13296 07-13296
Condensing Coil “T”
Door-L.H. 31-02491 31-02492 31-02513 31-02492 31-02513
Door R.H. 31-02493 31-02514
Door Trim 29-01379 29-01379 29-01379 29-01379 29-01379
Drier 09-09309 09-09309 09-09309 09-09309 09-09307
Evaporator Coil 07-13293 07-13293 07-13293 07-13311 07-13311
Evaporator Fan Blade 15-13106 15-13106 15-13106 15-13106 15-13106
Evaporator Fan Guard 25-01324 25-01324 25-01324 25-01324 25-01324
Evaporator Fan Motor 13-13181 13-13181 13-13181 13-13181 13-13181
Female Door Plug 21-00568 21-00568 21-00568 21-00568 21-00568
Leg “T” 27-00558 27-00558 27-00558 27-00558 27-00558
Light Switch 19-13118 19-13118 19-13118 19-13118 19-13118
Pilaster 200I166XX 200-16156C 200-16156C 200-16156C 200-16156C
Power Cord “B”

120/15A
220/15A
Power Cord “T”
120/15A
220/15A
Temperature Control 19-00903 19-00903 19-00903 19-00903 19-00903

Thermometer 44-00963 44-00963 44-00963 44-00963 44-00963
Wall Guard

14-1/16” X 45” 25-01296 25-01296

15-7/8” X 45” 25-01294 25-01294 25-01294
18-3/4” X 45” 25-01295 25-01295 25-01295 25-01295

21-01201

21-01454

21-01201

21-01454

21-01201

21-01454

21-01513
21-01243

21-01454
21-01243

21-01513
21-01243

21-01454
21-01243

Accessories

Description BMG/TMG-27 BMG/TMG-48 BMG/TMG-52 BMG/TMG-74 BMG/TMG-80

Baskets
(Cantilever)
Casters (4) 3”
Diameter
Casters (6) 3”
Diameter
Legs 6” A200-11170 A200-11170 A200-11170 A212-11170 A212-11170
Shelves
(Cantilever)

A200-16600 A302-16600 A200-16600 A302-16600

A200-11140 A200-11140 A200-11140

A212-11140 A212-11140

33-01473 33-01474 33-01475 33-01474 33-01475

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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 compliance with section 608 of the Clean Air Act
effective November 1995 and in accordance with all applicable local, regional, or national standards.

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