Master Bilt LAE Controller BMG/TMG 48 s User manual

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BMG/TMG -27, 48, 52, 74, 80
LAE CONTROLLER
Installation & Op rations Manual
Mast r-Bilt Products
908 Highway 15 North
N w Albany, MS 38652
Phon : [phone]
PN 075-90000
Rev 4-26-11

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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 Da age…………………………………………………………….…………… 6
INSTALLATION INSTRUCTIONS………………………………………………………………………………….. 6
General Instructions…………………………………………………………………………………………. 6
Mechanical ..…………………………………………………………………………………………………..6
Electrical…………...…………………………………………………………………………………………..7
Leg and Condensate Pan Installation..……………………………………………………………………..8
Doors ..…………....…………………………………………………………………………………………...8
ELECTRONIC CONTROLLER….………………………………………………………………………………..9-10
SERVICE INSTRUCTIONS ……………………………………………………………………………………..…11
TEMPERATURE SENSORS AND FAN MOTOR REPLACEMENT…………………………………………….12
FINAL CHECK LIST…………………………………………………………………………………….…………….12
MASTER-BILT PART NUMBERS ………………………………………………………………………………...13
ACCESSORIES …………………………………………………………………………………………………...13
SALE AND DISPOSAL …………………………………………………………………………………………….14
WIRING DIAGRAMS BMG/TMG...……………………………………….……..……………….………………15-17

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INTRODUCTION
Thank you for purchasing a Master-Bilt cabinet. This anual contains i portant instructions for installing, using, and
servicing a Master-Bilt BMG/TMG case. A parts list is included with this anual. Read all these docu ents carefully
before installing or servicing your equip ent.
STORE CONDITIONS
The Master-Bilt BMG/TMG cases are designed to operate in the controlled environ ent of an air-conditioned store.
The store te perature should be at or below 75°F and a relative hu idity of 55% or less. At higher te perature or
hu idity conditions, the perfor ance of these cases ay be affected and the capacity di inished.
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 perfor ance.
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
R ad this manual b for installing your cabin t. K p th manual and r f r to it b for
doing any s rvic on th quipm nt. Failur to do so could r sult in p rsonal injury or damag to th cabin t.
DANGER
Improp r or faulty hook-up of l ctrical compon nts on th r frig ration units can r sult in s v r injury or
d ath.
All l ctrical wiring hook-ups must b don in accordanc with all applicabl local, r gional or national
standards.
NOTICE
Installation and s rvic of th r frig ration and l ctrical compon nts of th cabin t must b p rform d by a
r frig ration m chanic and/or a lic ns d l ctrician.
The portions of this anual covering refrigeration and electrical co ponents contain technical instructions intended
only for persons qualified to perfor refrigeration and electrical work.
This anual cannot cover every installation, use or service situation. If you need additional infor ation, call or write us:
Custo er Service Depart ent
Master-Bilt Products
Highway 15 North
New Albany, MS 38652
Phone [phone]
Fax [phone]

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CAUTION!
GROUND REQUIRED
FOR SAFE OPERATION
WARNING LABELS AND SAFETY INSTRUCTIONS
This sy bol is the safety-alert sy bol. When you see this sy bol on your cabinet or in this
anual, be alert to the potential for personal injury or da age to your equip ent.
Be sure you understand all safety essages and always follow reco ended precautions and safe operating
practices.
NOTICE TO EMPLOYERS
You must mak sur that v ryon who installs, us s or s rvic s your cabin t is thoroughly familiar with all
saf ty information and proc dur s.
I portant safety infor ation is presented in this section and throughout the anual. The following signal words are
used in the warnings and safety essages:
DANGER: Severe injury or death will occur if you ignore the essage.
WARNING: Severe injury or death can occur if you ignore the essage.
CAUTION: Minor injury or da age to your cabinet can occur if you ignore the essage.
NOTICE: This is i portant installation, operation or service infor ation. If you ignore the
essage, you ay da age your cabinet.
Th warning and saf ty lab ls shown throughout this manual ar plac d on your Mast r-Bilt Products cabin t
at th factory. Follow all warning lab l instructions. If any warning or saf ty lab ls b com lost or damag d,
call your custom r s rvic d partm nt at [phone] for r plac m nts.
This label is located on top of the electrical control
This label is attached to the cabinet power cord
label and on the wiring channel. on models with a power cord.

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PRE-INSTALLATION INSTRUCTIONS
INSPECTION FOR SHIPPING DAMAGE
You are responsible for filing all freight clai s with the delivering truck line. Inspect all cartons and crates for da age
as soon as they arrive. If da age 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 da age is discovered when the cabinet is uncrated, i ediately call the delivering truck line and follow up the call
with a written report indicating concealed da age to your ship ent. Ask for an i ediate inspection of your concealed
da age ite . Crating aterial ust be retained to show the inspector fro the truck line.
INSTALLATION INSTRUCTIONS
GENERAL INSTRUCTIONS
1. Be sure the equip ent is properly installed by co petent service people.
2. Keep the equip ent clean and sanitary so it will eet your local sanitation codes. Clean the cabinet with a ild
detergent and water, then rinse.
3. Rotate your stock so that older stock does not accu ulate. This is especially i portant for ice
crea . 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 s all quantities to store te peratures for short periods of ti e.
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
Moistur or liquid around or und r th cabin t is a pot ntial slip/fall hazard for p rsons walking by or working
in th g n ral ar a of th cabin t. Any cabin t malfunction or hous k ping probl m that cr at s a slip/fall
hazard around or und r th cabin t should b corr ct d imm diat ly.
If oisture or liquid is observed around or under a Master-Bilt cabinet, an i ediate investigation should be ade by
qualified personnel to deter ine the source of the oisture or liquid. The investigation should deter ine if the cabinet
is alfunctioning or if there is a drainpipe leaking.
MECHANICAL
Re ove front grille and check refrigeration lines to see that they are free (not touching each other or co pressor).
Spin condenser fan blade to see that it is free.
The co pressor is her etic, it is internally spring ounted and ready to run.
Re ove cabinet fro crate base and slide into location. Cabinet ust be level fro side to side and front to back for
correct draining of coil pan and for self-closing doors to operate correctly. Allow ini u of 4” between back of cabinet
and wall and between top of cabinet and ceiling for proper condensing unit air circulation.
To co ply with Sanitation require ents the cabinet ust be ounted on legs (6” high in.) or casters or the base ust
be sealed to the floor (BMG) with an N.S.F. listed silicone sealant.
Hang provided NSF Listed ther o eter at front of top shelf unless cabinet provided with electronic control.

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ELECTRICAL
WARNING
B for s rvicing l ctrical compon nts in th cas or th doors or door fram s mak sur all pow r to cas is
off. Always us a qualifi d t chnician.
NOTICE
For mod ls with l ctronic ballast only:
For replacement ballast, use only ballast that complies with UL Type CC rating i unit is equipped with
electronic ballast.
Check voltage and a ps drawn on (Page 12-15) to deter ine proper line and fuse or circuit breaker size. Check power
supply for low voltage. If voltage reads “120” with no load, and it drops below “100 or less” when the co pressor tries to
start, it is an indication of too s all supply wiring or too long to run.
It is reco ended 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 120-volt circuits. “Tapping” or feeding the 115-volt circuit fro 230-volt supply
ay result in overloaded circuit breakers or blown fuses and da age to electrical syste , thereby voiding the warranty.
Th cabin t should b ground d.

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LEG AND CONDENSATE PAN INSTALLATION FOR TOP
MOUNT CABINETS ONLY
1. Screw legs into existing crate ounting
holes.
2. Mount pan and bracket asse bly to rear
of cabinet with 2 large sheet etal screws
(supplied). Be sure pan is located directly
under cabinet drain
DOORS
The BMG/TMG cabinets have Anthony glass doors
that are equipped with a patented TorqueMaster
hinge syste . The doors are easily adjusted using
a flathead screwdriver (Fig.3).
Figur 4
GRILL
To re ove the door shipping cla ps,re ove the 4 shipping screws fro the grill and re ove the screws fro the
cla ps (Fig.4), and replace grill.
Torque Adjust ent
Leveling Adjust ent
Figure 3

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MASTER-BILT ELECTRONIC REFRIGERATION CONTROL
Display Lay-out
Compr ssor When power is first turned on to the control, the LED indicator for the Ther ostat output will go through
the start-up delay. After a one- inute delay the co pressor co es on. The LED indicator stays on while co pressor
relay is energized. Display will show actual box te perature. Picture above is the display layout. The co pressor will be
cycled off when the actual box te perature reaches its set point. The Ther ostat output indicator will be off.
Fan The fans will run constantly for BMG/TMG cooler application. The Evaporator fan will also cut off when the
evaporator te p is above the fan stop te perature setting.
D frost The control uses off cycle defrost for the BMG/TMG cooler.
MANUAL DEFROST
Defrosting y also be induced anually by keeping the defrost button for 5 seconds. Once defrost has started, the
defrost will go through a defrost and drip ti e pull down cycle.

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HOW TO CHANGE THE SETPOINT
HOW TO CHANGE a param t r valu
LIST OF PARAMETERS
Here is a list of the para eters the value of which can be changed in the progra ing ode, as well as their ranges.
Display
Symbol Param t r Rang
Mast r-Bilt’s
BMG/TMG S tting
SP Te perature Set Point SPL…SPH 35°F
HYS Te perature Differential 1 to 255°F 5°
SPL Mini u Te perature li it setpoint -50…SPH 27°F
SPH Maxi u Te perature li it setpoint SPH…120° 50°F
AHA High Te perature Alar -50…120° 65°F
ALA Low Te perature Alar 50…120° 0°F
ATD Te perature Alar Delay 0…120 in 30 in
DFR Nu ber of Defrost Cycle per 24hr 0…24 Off Cycle
DLI Defrost Ter ination Te perature -50…120° -
DTO Maxi u Defrost Duration 1…120 in 30 in
ELECTRICAL CONNECTIONS
The controller is provided with a screw ter inal block to connect cables with a cross section up to 2,5
2
. Before
connecting cables ake sure the power supply co plies with the control’s require ents. Separate the probe cables
fro the power supply cables, the outputs and the power connections. Do not exceed the axi u current allowed on
each relay, in case of heavier loads use a suitable external relay or contactor’s.
PROBE CONNECTIONS
The probes shall be ounted with the bulb upwards to prevent da age due to casual liquid infiltration. It is
reco ended to place the ther ostat probe at the war est loacation of return air strea s to correctly easure the
average roo te perature. Place the defrost ter ination probe a ong the evaporator fins in the coldest place, where
ost ice is for ed, far fro heaters or fro the war est place during defrost, to prevent pre ature defrost ter ination.

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SERVICE INSTRUCTIONS
1. High head pressure and high back pressure:
A. Condenser coil clogged or restricted
B. Condenser fan otor defective.
C. Air discharge in rear of cabinet restricted.
2. Low back pressure and low head pressure:
A. Restriction in syste .
B. Refrigerant undercharged.
C. Leak in syste
3. Pressure nor al – cabinet war :
A. Coil blocked with frost (see #4).
B. Refrigerant undercharged.
C. Control set too war .
4. Cabinet not cycling – coil blocked with frost:
A. Defective te perature controller.
B. Refrigerant overcharged.
C. Location too hot.
D. Condenser clogged.
E. Condenser fan otor defective.
5. Co pressor 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 SENSORS AND FAN MOTOR REPLACEMENT
Before making any change, technician should:
1. Disconnect power to the cabinet
2. Re ove screws fro venturi and pull down
To change a te perature sensor (cabinet zone sensor or defrost ter ination sensor), si ply disconnect the sensor
wires fro the controller and replace the new sensor in the original position. Use plastic tie to tighten the zone sensor.
Insert the sensor for defrost ter ination fir ly into the evaporator coil, in between the fins. Make sure the sensor wires
do not touch or are not close to any heater rods
To change fan otor – disconnect fan otor leads – re ove screws fro fan guards and otor ounts.
FINAL CHECK LIST
A. Check operating pressures.
B. Check electrical require ents of unit to supply voltage.
C. Set te perature control for desired te perature range.
D. Check sight glass for proper refrigerant charge if provided
E. Check condensing unit for vibrating or rubbing tubing. Da pen and cla p as required.

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MASTER-BILT PART LIST
The table below gives Master-Bilt part nu bers. Use this chart when ordering replace ent parts for your BMG/TMG
cabinets. Always Advise Cabinet Serial Nu ber When Ordering Parts
D scription BMG/TMG-27 BMG/TMG-48 BMG/TMG-52 BMG/TMG-74 BMG/TMG-80
Accu ulator 09-00812 09-00813 09-00813 09-00812 09-00812
Ballast 23-01709 23-01704 23-01704 23-01704 23-01704
Bulb 23-01575 23-01575 23-01575 23-01575 23-01575
La p 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
Co pressor “B” 03-50330 03-50330 03-50330 03-14901 03-14901
Co pressor “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 Tri 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
Fe ale 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 21-01201 21-01201 21-01201 21-01513 21-01243
21-01513
21-01243
Power Cord “T” 120/15A
220/15A 21-01454 21-01454 21-01454 21-01454 21-01243
21-01454
21-01243
Electronic Control 19-14243 19-14243 19-14243 19-14243 19-14243
Te perature Sensor T1 19-14244 19-14244 19-14244 19-14244 19-14244
Te perature Sensor T2 19-14245 19-14245 19-14245 19-14245 19-14245
External Relay 19-14284 19-14284 19-14284 19-14284 19-14284
Ther o eter 44-00963 44-00963 44-00963 44-00963 44-00963
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
Acc ssori s
D scription BMG/TMG-27 BMG/TMG-48 BMG/TMG-52 BMG/TMG-74 BMG/TMG-80
Baskets (Cantilever) A200-16600 A302-16600 A200-16600 A302-16600
Casters (4) 3” Dia eter A200-11140 A200-11140 A200-11140
Casters (6) 3” Dia eter A212-11140 A212-11140
Legs 6” A200-11170 A200-11170 A200-11170 A212-11170 A212-11170
Shelves (Cantilever) 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 ust ake sure that all safety labels and the Installation - Service
Manual are included with it. If you need replace ent labels or anuals, Master-Bilt will provide the free. Contact
the custo er service depart ent at Master-Bilt at [phone].
The custo er service depart ent at Master-Bilt should be contacted at the ti e of sale or disposal of your cabinet so
records ay be kept of its new location
If you sell or give away your Master-Bilt cabinet and you evacuate the refrigerant charge before ship ent, Master-Bilt
reco ends that the refrigerant charge be properly recovered in co pliance with section 608 of the Clean Air Act
effective Nove ber 1995 and in accordance with all applicable local, regional, or national standards.

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