Master Bilt | LAE Controller BMG/TMG 74 s | Service manual | Master Bilt LAE Controller BMG/TMG 74 s Service manual

BMG/TMG -27, 48, 52, 74, 80
LAE CONTROLLER
Installation & Operations Manual
Master-Bilt Products
908 Highway 15 North
New Albany, MS 38652
Phone: (800) 684-8988
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 Damage…………………………………………………………….…………… 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 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 cabinet 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 (800) 684-8988
Fax (800) 684-8988
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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 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 (800) 684-8988 for replacements.
CAUTION!
GROUND REQUIRED
FOR SAFE OPERATION
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 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 “120” with no load, and it drops below “100 or less” 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 120-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.
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LEG AND CONDENSATE PAN INSTALLATION FOR TOP
MOUNT CABINETS ONLY
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
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
GRILL
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.
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MASTER-BILT ELECTRONIC REFRIGERATION CONTROL
Display Lay-out
Compressor When power is first turned on to the control, the LED indicator for the Thermostat output will go through
the start-up delay. After a 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 Thermostat 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 temp is above the fan stop temperature setting.
Defrost
The control uses off cycle defrost for the BMG/TMG cooler.
MANUAL DEFROST
Defrosting my also be induced manually by keeping the defrost button for 5 seconds. Once defrost has started, the
defrost will go through a defrost and drip time pull down cycle.
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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
SP
HYS
SPL
SPH
AHA
ALA
ATD
DFR
DLI
DTO
Parameter
Temperature Set Point
Temperature Differential
Minimum Temperature limit setpoint
Maximum Temperature limit setpoint
High Temperature Alarm
Low Temperature Alarm
Temperature Alarm Delay
Number of Defrost Cycle per 24hr
Defrost Termination Temperature
Maximum Defrost Duration
Range
SPL…SPH
1 to 255°F
-50…SPH
SPH…120°
-50…120°
50…120°
0…120min
0…24
-50…120°
1…120min
Master-Bilt’s
BMG/TMG Setting
35°F
5°
27°F
50°F
65°F
0°F
30min
Off Cycle
30min
ELECTRICAL CONNECTIONS
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The controller is provided with a screw terminal block to connect cables with a cross section up to 2,5 mm . Before
connecting cables make sure the power supply complies with the control’s requirements. Separate the probe cables
from the power supply cables, 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 damage due to casual liquid infiltration. It is
recommended to place the thermostat probe at the warmest loacation of return 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 defrost termination.
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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 SENSORS 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 a temperature sensor (cabinet zone sensor or defrost termination sensor), simply disconnect the sensor
wires from the controller and replace the new sensor in the original position. Use plastic tie to tighten the zone sensor.
Insert the sensor for defrost termination firmly 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 motor – disconnect fan motor leads – remove screws from fan guards and motor mounts.
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
Accumulator
Ballast
Bulb
Lamp Holder
Capillary Tube
Condensate Heater “B”
Condensate Heater “T”
Compressor “B”
Compressor “T”
Condensing Coil “B”
Condensing Coil “T”
Door-L.H.
Door R.H.
Door Trim
Drier
Evaporator Coil
Evaporator Fan Blade
Evaporator Fan Guard
Evaporator Fan Motor
Female Door Plug
Leg “T”
Light Switch
Pilaster
Power Cord “B” 120/15A
220/15A
Power Cord “T” 120/15A
220/15A
Electronic Control
Temperature Sensor T1
Temperature Sensor T2
External Relay
Thermometer
14-1/16” X 45”
15-7/8” X 45”
18-3/4” X 45”
BMG/TMG-27
09-00812
23-01709
23-01575
23-50562
11-01450
17-00380
17-00421
03-50330
03-50330
07-13253
BMG/TMG-48
09-00813
23-01704
23-01575
23-50562
11-01450
BMG/TMG-52
09-00813
23-01704
23-01575
23-50562
11-01450
BMG/TMG-74
09-00812
23-01704
23-01575
23-50562
11-01450
BMG/TMG-80
09-00812
23-01704
23-01575
23-50562
11-01450
17-00421
03-50330
03-50330
07-13253
17-00421
03-50330
03-50330
07-13253
17-00421
03-14901
03-14901
07-13296
17-00421
03-14901
03-14901
07-13296
31-02491
31-02513
31-02514
29-01379
09-09309
07-13293
15-13106
25-01324
13-13181
21-00568
27-00558
19-13118
200-16156C
31-02492
31-02513
29-01379
09-09309
07-13293
15-13106
25-01324
13-13181
21-00568
27-00558
19-13118
200I166XX
31-02492
31-02493
29-01379
09-09309
07-13293
15-13106
25-01324
13-13181
21-00568
27-00558
19-13118
200-16156C
21-01201
21-01201
21-01201
21-01454
21-01454
21-01454
19-14243
19-14244
19-14245
19-14284
44-00963
19-14243
19-14244
19-14245
19-14284
44-00963
25-01296
19-14243
19-14244
19-14245
19-14284
44-00963
29-01379
09-09309
07-13311
15-13106
25-01324
13-13181
21-00568
27-00558
19-13118
200-16156C
21-01513
21-01243
21-01454
21-01243
19-14243
19-14244
19-14245
19-14284
44-00963
25-01296
29-01379
09-09307
07-13311
15-13106
25-01324
13-13181
21-00568
27-00558
19-13118
200-16156C
21-01513
21-01243
21-01454
21-01243
19-14243
19-14244
19-14245
19-14284
44-00963
25-01294
25-01295
25-01294
25-01295
A200-11140
BMG/TMG-48
A200-16600
A200-11140
BMG/TMG-52
A302-16600
A200-11140
A200-11170
33-01473
A200-11170
33-01474
A200-11170
33-01475
25-01295
25-01294
25-01295
BMG/TMG-74
A200-16600
BMG/TMG-80
A302-16600
A212-11140
A212-11170
33-01474
A212-11140
A212-11170
33-01475
Accessories
Description
Baskets (Cantilever)
Casters (4) 3” Diameter
Casters (6) 3” Diameter
Legs 6”
Shelves (Cantilever)
BMG/TMG-27
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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 (800) 684-8988.
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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