Commercial
Freezer
Service Manual
M3 Series Prep Table
Under Counter Freezer Series
Model No: MUF-48
MUF-28
TABLE OF CONTENTS
1.FEATURE CHART
1-1.FRONT VIEW
1-2.SIDE VIEW
2.WIRING DIAGRAMS
2-1.MUF-48
2-2.MUF-28
3.PART DETAILS
3-1.COMPRESSOR COMPARTMENT
3-2.DOOR
3-3.REFRIGERATION COMPARTMENT
4.MAIN COMPONENTS
5.TEMPERATURE CONTROL INSTRUCTION
5-1.HOW TO USE THE TEMPERATURE CONTROL
5-2.FUNCTION TABLE
6.PARTS LIST
7.REPLACEMENT OF MAIN COMPONENTS
7-1.REPLACING DOOR
7-2.REFRIGERATION COMPARTMENT PARTS
7-3.COMPRESSOR COMPARTMENT PARTS
7-4.REPLACING THE EVAPORATOR & EVAPORATOR FAN MOTOR
1.FEATURE CHART
1-1.FRONT VIEW
MUF-48 MUF-28
1-2.SIDE VIEW
1 COUNTER TOP
2 DOOR(L)
3 DOOR HANDLE(L)
4 EVAPORATOR DUCT
5 LOUVER
6 MULLION
7 SHELF( R )
8 CABINET ASSEMBLY
9 DOOR GASKET
10 SHELF CLIP
11 TOP HINGE
12 EVAPORATOR FAN MOTOR
13 EVAPORATOR COIL
14 EVAPORATOR DRAIN GUIDE
15 DOOR BOTTOM HINGE
16 CASTOR
2.WIRRING DIAGRAMS
2-1.MUF-48
2-2.MUF-28
3.PART DETAILS
3-1. COMPRESSOR COMPARTMENT
MUF-48 MUF-28
CONDENSER UNIT ASSEMBLY
3-2. DOOR
DOOR GASKET
3-3.REFRIGERATION COMPARTMENT
TEMPERATURE CONTROL & EVAPORATOR ,THEMOSTAT
PART DETAILS
EVAPORATOR FAN MOTOR
4.MAIN COMPONENTS
1.COMPRESSOR
MODEL
MUF-48
MUF-28
2.COMPRESSOR RELAY ,OVERLOAD
MODEL
MUF-48
MUF-28 ~
3.COMPRESSOR CAPACITOR
MODEL
MUF-48
MUF-28
4.CONDENSER FAN MOTOR
MODEL
MUF-48
MUF-28
5.EVAPORATOR FAN MOTOR
MODEL
MUF-48
MUF-28
PART NAME PART NO. HORSE CAPACITY TYPE OF INPUT
CAE2420Z
HBL-27YE-1
G2F5700100
M369700100
RELAY PART NO. OVERLOAD PART NO. MAKER
3ARR12 ~ MST16AHN-3240 ~ TECUMSHE
GSR SO68 E03 03 ~ 783RHBZZ-52 ~ DAEWOO
STARTING PART NO. RUNNING PART NO. MAKER
250V/160uF ~ ~ ~
125V/100uF ~ 250V/10uF ~ ~
PART NAME PART NO. POLE INPUT TYPE BLADE
IS-4420DWSN-2A
IS-4420DWSN-2A
PART NAME
DAI-6202DEUA 2P
DAI-6202DEUA 2P
3963328120
3963328120
PART NO. POLE
M729900200
1/3HP ~ CSR 115V 60Hz
1/4HP ~ CSR 110-115V 60Hz
4P
115V 60Hz
INPUT TYPE
SHADED
POLE
INDUCTION
AL 5
BLADE
(NUMBER)
115v 60Hz
115v 60Hz
SHADED
POLE
INDUCTION
ZYTEL
4
MAKER
TECUMSHE
DAEWOO
NOTE
~
NOTE
~
~
MAKER
SUNGSHIN
MAKER
SUNGSHIN
6.THERMOSTAT
PART NAME RATING
THERMOSTAT ~
THERMOSTAT ~
PART NO.
PAF-7037-01
MUF-48
PAF-7037-02
MUF-28
MAKER
RANCO
RANCO
5.TEMPERATURE CONTROL INSTRUCTION
5-1.HOW TO USE THE TEMPERATURE CONTROL
5-2.FUNCTION TABLE
No Function Controlled
Tempressor Compressor 1.The temperature can be changed by turning the dial knob
Control Evap.Fan motor 2.Compressor is automatically turned on and off by thermostat.
Cond.Fan Motor ■ Cut in and out temperature chart. °F
1 Model:
MUF-28
2 Model:
MUF-48
NO. Cool Normal Cold
Cut in 9.5±1.5 5.9±1.5 4.1±1.5
Cut Out -3.1 -6.7 -7.5
NO. Cool Normal Cold
Cut in 2.3±1.5 -1.3±1.5 -3.1±1.5
Cut Out -9.4 -13 -14.8
Description
6.PARTS LIST FOR M3 MUF
Part name Part code Description
Model
48 28
COUNTER TOP
COUNTER TOP Assembly WR25700100 SUS304-#4 1
COUNTER TOP Assembly WR45700100 SUS304-#4 1
CASTER M726500100 5INCH MOVING 2 2 SAME AS SD SERIES
CASTER M726500200 5INCH MOVING STOPPING 2 2 SAME AS SD SERIES
DOOR
TOP HINGE ( R ) M722900100 SUS304-2B,SM45C 1 1 SAME AS SD SERIES
TOP HINGE ( L ) M722900200 SUS304-2B,SM45C 1 SAME AS SD SERIES
TOP HINGE SPACER M725000100 SUS439-2B 2 1 SAME AS SD SERIES
BOTTOM HINGE (U)(R) 30229M0400 SUS304-2B,SM45C 1 1 SAME AS SD SERIES
BOTTOM HINGE (U)(L) 30229M0300 SUS304-2B,SM45C 1 SAME AS SD SERIES
DOOR GASKET M272300100 PVC 1 SAME AS SD SERIES
DOOR GASKET M722300100 PVC 2 SAME AS SD SERIES
DOOR Assembly (R) WM20000900 SUS304-#4 1
DOOR Assembly (R) WM71700100 SUS304-#4 1
DOOR Assembly (L) WM71700200 SUS304-#4 1
DOOR BUSHING M720700100 PA-66 4 2 SAME AS SD SERIES
Remark
COMPRESSOR COMPARTMENT
COMPRESSOR M369700100 HBL-27YE-1 (1/4HP) 1 SAME AS SD SERIES
COMPRESSOR G2F5700100 SK1A1C-L2W (1/3HP) 1 SAME AS SD SERIES
SUCTION PIPE(B) UF24400100 CU 1 SAME AS SD SERIES
SUCTION PIPE(B) UF44400100 CU 1 SAME AS SD SERIES
SUCTION PIPE(A) UF24400200 CU 1 SAME AS SD SERIES
SUCTION PIPE(A) UF44400200 CU 1 SAME AS SD SERIES
COMP BASE M270300100 GI 1 SAME AS SD SERIES
COMP BASE M600300100 GI 1 SAME AS SD SERIES
Part name Part code Description
CONDENSER FAN MOTOR 3963328120
POWER CORD M721300100
CONDENSER FAN AIR GUIDE M722500900 GI SAME AS SD SERIES
DRAIN PIPE UF44400500 CU 1 SAME AS SD SERIES
CONDENSER MOTOR BRACKET 3020602200
CONDENSER FAN BLADE M729800100
IS4420DWSN-2A 1 1
KKP-30(9.85FT)
GI
AL
Model
48 28
1 1 SAME AS SD SERIES
1 1 SAME AS SD SERIES
1 1 SAME AS SD SERIES
Remark
SAME AS SD SERIES
REFRIGERATION COMPARTMENT
EVAP FAN MOTOR M729900200
DAI-6202DEUA
3 2 SAME AS SD SERIES
Part name Part code Description
LOUVER UF25800100 SUS439-2B 1 SAME AS SD SERIES
LOUVER UF45800100 SUS439-2B 1 SAME AS SD SERIES
SHELF WM77800100 Pe-coating(gray) 2
SHELF WM27800100 Pe-coating(gray) 1
FIXTURE SHELF CLIP 30220L0900 PA-66 8 4 SAME AS SD SERIES
SHELF MID BRACKET M720600100 SUS304 1 SAME AS SD SERIES
SHELF STANDARD M725300200 SUS304 8 4 SAME AS SD SERIES
DRAIN PAN GUIDE(R) M272500100 GI
DRAIN PAN GUIDE(L) M272500200 GI
EVAPORATOR AS UF27000100 CU,SPG,AL
EVAPORATOR AS UF47000100 CU,SPG,AL
THERMOSTAT PAF-7037-01 1 SAME AS SD SERIES
THERMOSTAT PAF-7037-02
EVAPOVATOR FAN DUCT UF26900200 SUS439-2B 1 SAME AS SD SERIES
EVAPOVATOR FAN DUCT UF46900200 SUS439-2B 1 SAME AS SD SERIES
EVAPOVATOR DUCT UF26900100 SUS439-2B 1 SAME AS SD SERIES
EVAPOVATOR DUCT UF46900100 SUS439-2B 1 SAME AS SD SERIES
MULLION FRAME M722200400 PVC 1 SAME AS SD SERIES
MULLION BACK FRAME M722200200 SUS439-2B 1 SAME AS SD SERIES
MULLION FRAME INSULATION M723300100 F-PS 1 SAME AS SD SERIES
CONDENSER AS UF25900101 CU,SPG,AL 1 SAME AS SD SERIES
CONDENSER AS UF45900101 CU,SPG,AL 1 SAME AS SD SERIES
BRACKET MOTOR UF40600101 SUS304-2B 3 2 SAME AS SD SERIES
FAN COOLING BLADE 3011802210 ZYTEL 3 2 SAME AS SD SERIES
SPACER CUSHION M721500300 RUBBER 4 4 SAME AS SD SERIES
Model
48 28
1
1
Remark
1
1
1
SAME AS SD SERIES
SAME AS SD SERIES
SAME AS SD SERIES
SAME AS SD SERIES
SAME AS SD SERIES
7.REPLACEMENT OF MAIN COMPONENTS
7-1.REPLACING DOOR
A.Unscrew the top hinge
B.Lift the door
7-2.REFRIGERATION COMPARTMENT PARTS
A.Disassemble the evaporator fan duct assembly
REPLACEMENT OF MAIN COMPONENTS
B.Disassemble the evaporator fan motor
D.Disassemble the evaporator duck
REPLACEMENT OF MAIN COMPONENTS
E.Remove the thermostat & sensor
F.Remove the evaporator coil
7-3.COMPRESSOR COMPARTMENT PARTS
A.Disassemble the rear grill
REPLACEMENT OF MAIN COMPONENTS
B.Disassemble the cable tie
C.Disassemble the condesing unit
two screws as above Pull out the condensing unit
D.Disassemble the condenser fan motor
REPLACEMENT OF MAIN COMPONENTS
7-4.REPLACING THE EVAPORATOR & EVAPORATOR FAN MOTOR.
A.Unscrew the screw located on both sides and top of the evap duct assamble fixture
D.Unscrew the screws located on left and right side of the evap duct.
REPLACEMENT OF MAIN COMPONENTS
E.And then, you can replace fan motor, evaporator coil and thermo sensor.
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