Read this manual thoroughly before operating, installing
or performing maintenance on the equipment. Failure
to follow instructions in this manual can cause property
damage, injury or death.
DANGER
Do not install or operate equipment that has been
misused, abused, neglected, damaged, or altered/
modified from that of original manufactured
specifications.
DANGER
Keep power cord AWAY from HEATED surfaces. DO NOT
immerse power cord or plug in water. DO NOT let power
cord hang over edge of table or counter.
DANGER
All utility connections and fixtures must be maintained
in accordance with Local and national codes.
Warning
n
Authorized Service Representatives are obligated to
follow industry standard safety procedures, including,
but not limited to, local/national regulations for
disconnection / lock out / tag out procedures for all
utilities including electric, gas, water and steam.
Warning
n
Do not store or use gasoline or other flammable vapors
or liquids in the vicinity of this or any other appliance.
Never use flammable oil soaked cloths or combustible
cleaning solutions, for cleaning.
Warning
n
Do not use electrical appliances or accessories other
than those supplied by the manufacturer.
Warning
n
Use caution when handling metal surface edges of all
equipment.
Warning
n
This appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
concerning use of the appliance by a person responsible
for their safety. Do not allow children to play with this
appliance.
Caution
,
Use caution handling, moving and use of the R290
refrigerators to avoid either damaging the refrigerant
tubing or increasing the risk of a leak. Components
shall be replaced with like components. Servicing shall
be done by a factory authorized service personnel to
minimize the risk of possible ignition due to incorrect
parts or improper service.
Notice
Proper installation, care and maintenance are
essential for maximum performance and trouble-free
operation of your equipment. Visit our website www.
mtwkitchencare.com for manual updates, translations,
or contact information for service agents in your area.
Warning
n
This product contains chemicals known to the State
of California to cause cancer and/or birth defects or
other reproductive harm. Operation, installation, and
servicing of this product could expose you to airborne
particles of glasswool or ceramic fibers, crystalline
silica, and/or carbon monoxide. Inhalation of airborne
particles of glasswool or ceramic fibers is known to the
State of California to cause cancer. Inhalation of carbon
monoxide is known to the State of California to cause
birth defects or other reproductive harm.
Table of Contents
Section 1
General Information
Section 2
Installation
Section 3
Operation
Table of Contents
Model Numbers .................................................................................................................. 5
Serial Number Information ...............................................................................................5
Warranty Information ........................................................................................................ 5
Electrical Service ................................................................................................................ 9
Voltage .......................................................................................................................................................9
R290 Temperature Control & Display ........................................................................................... 15
R290 Evaporator Fan Operation ..................................................................................................... 15
Changing Display from Fahrenheit to Celsius on ERC112 Control .................................... 16
Section 4
Maintenance
Cleaning and Sanitizing Procedures ...............................................................................17
General .................................................................................................................................................... 17
Door Hinges .......................................................................................................................................... 21
Part Number GUC_SM 12/16 3
Table of Contents (continued)
Section 5
Troubleshooting
Problem -> Cause -> Correction Chart ............................................................................23
Section 6
Controls
ERC Control Settings ........................................................................................................25
Condenser Fan Access ......................................................................................................30
LED Light Replacement ....................................................................................................31
Section 8
Normal Operating Temperatures for Models Using Refrigerant R290
Series GU Work Table Refrigerators ................................................................................ 33
Series GU Work Table 1 Door Freezers ...........................................................................36
Series GU Work Table 2 Door Freezers ............................................................................39
Section 9
Diagrams
Standard GUR Work Table Refrigerator ..........................................................................42
GUR Work Table Refrigerator With Optional Switch ......................................................43
Standard GUF Work Table Freezer ..................................................................................44
GUF Work Table Freezer With Optional Switch .............................................................. 45
4 Part Number GUC_SM 12/16
Section 1
General Information
Model Numbers
This manual covers the following models:
Work Top Refrigerator
Stainless Steel
Door
GUR24(B)P-SGUR24(B)P-GGUR24(B)P-D
GUR27(B)P-SGUR27(B)P-GGUR27(B)P-D
GUR32(B)P-SGUR32(B)P-GGUR32(B)P-D
GUR48(B)P-SGUR48(B)P-GGUR48(B)P-D
GUR60(B)P-SGUR60(B)P-GGUR60(B)P-D
GUR72(B)P-SGUR72(B)P-GGUR72(B)P-D
Stainless Steel DoorDrawers
GUF27(B)P-SGUF27(B)P-D
GUF32(B)P-SGUF32(B)P-D
GUF48(B)P-SNA
GUF60(B)P-SGUF60(B)P-D
Glass DoorDrawers
Work Top Freezer
Serial Number Information
The serial number is on the identification plate that also
includes the model number. The identification plate is
located near the top front corner of the left interior wall.
Always have the serial number of your unit available
when calling for parts or service.
Warranty Information
Visit www.delfield.com/warranty to:
• Register your product for warranty.
• Verify warranty information.
• View and download a copy of your warranty.
Regulatory Certifications
All models are certified by:
•
•
•
National Sanitation Foundation (NSF)
Underwriters Laboratories (UL)
Underwriters Laboratories of Canada (CUL)
Part Number GUC_SM 12/16 5
General Information Section 1
THIS PAGE INTENTIONALLY LEFT BLANK
6 Part Number GUC_SM 12/16
Section 2
Installation
DANGER
Installation must comply with all applicable fire and
health codes in your jurisdiction.
DANGER
Use appropriate safety equipment during installation
and servicing.
Warning
n
Do not damage the refrigeration circuit when installing,
maintaining or servicing the unit.
Location
Warning
n
This equipment must be positioned so that the plug is
accessible unless other means for disconnection from
the power supply (e.g., circuit breaker or disconnect
switch) is provided.
Warning
n
Adequate means must be provided to limit the
movement of this appliance without depending on or
transmitting stress to the electrical conduit or gas lines.
The location selected for the equipment must meet the
following criteria. If any of these criteria are not met, select
another location.
• The location MUST be level, stable and capable of
supporting the weight of the equipment.
• The location MUST be free from and clear of
combustible materials.
• Equipment MUST be level both front to back and side to
side.
• Position the equipment so it will not tip or slide.
• Front casters MUST be locked once positioned.
• Recommended air temperature is 50° - 100°F
(10° - 38°C).
• Proper air supply for ventilation is REQUIRED AND
CRITICAL for safe and efficient operation.
• Do not obstruct the flow of ventilation air. Make sure the
air vents of the equipment are not blocked.
• Do not install the equipment directly over a drain.
Steam rising up out of the drain will adversely affect
operation, air circulation, and damage electrical /
electronic components.
Warning
n
To avoid instability the installation area must be capable
of supporting the combined weight of the equipment
and product. Additionally the equipment must be level
side to side and front to back.
Warning
n
This equipment is intended for indoor use only. Do not
install or operate this equipment in outdoor areas.
Part Number GUC_SM 12/16 7
Installation Section 2
Weight of Equipment
DescriptionModelWeight
24” Refrigerator
27” Refrigerator
32” Refrigerator
48” Refrigerator
60” Refrigerator
72” Refrigerator
27” Freezer
32” Freezer
48” Freezer
60” Freezer
GUR24(B)P-S,
GUR24(B)P-G
GUR24(B)P-D
GUR27(B)P-S,
GUR27(B)P-G
GUR27(B)P-D
GUR32(B)P-S,
GUR32(B)P-G
GUR32(B)P-D
GUR48(B)P-S,
GUR48(B)P-G
GUR48(B)P-D
GUR60(B)P-S,
GUR60(B)P-G
GUR60(B)P-D
GUR72(B)P-S,
GUR72(B)P-G
GUR72(B)P-D
GUF27(B)P-S
GUF27(B)P-D
GUF32(B)P-S
GUF32(B)P-D
GUF48(B)P-S
GUF60(B)P-S
GUF60(B)P-D
140 lbs ( 64kg)
162 lbs ( 73kg)
145 lbs ( 66kg)
168 lbs ( 76kg)
161 lbs ( 73kg)
185 lbs ( 84kg)
207 lbs ( 94kg)
252 lbs ( 114kg)
234 lbs ( 106kg)
284 lbs ( 129kg)
263 lbs ( 119kg)
330 lbs ( 150kg)
151 lbs ( 68kg)
175lbs ( 79kg)
165 lbs ( 75kg)
189 lbs ( 86kg)
224 lbs ( 102kg)
250 lbs ( 113kg)
300 lbs ( 136kg)
Clearance Requirements
• Keep the vents clean and free of obstruction.
• Casters or optional legs must be used and not removed.
Dimensions
Work Height with
ModelsLengthDepth
GUR24(B)P-S,
GUR24(B)P-G,
GUR24(B)P-D
GUR27(B)P-S,
GUR27(B)P-G,
GUR27(B)P-D
GUF27(B)P-S,
GUF27(B)P-D
GUR32(B)P-S,
GUR32(B)P-G,
GUR32(B)P-D
GUF32(B)P-S,
GUF32(B)P-D
GUR48(B)P-S,
GUR48(B)P-G,
GUR48(B)P-D
GUF48(B)P-S
GUR60(B)P-S,
GUR60(B)P-G,
GUR60(B)P-D
GUF60(B)P-S,
GUF60(B)P-D
GUR72(B)P-S,
GUR72(B)P-G,
GUR72(B)P-D
24.00”
(61cm)
27.00”
(69cm)
32.00”
(81cm)
48.00”
(122cm)
60.00”
(152cm)
72.00”
(183cm)
31.50”
(80cm)
5”
Casters
or Feet
36.00“
(91cm)
Units with a backsplash have a B in the model number. The
backsplash doesn’t change the work height but adds 4.00”
(10cm) to the overall height.
3”
Casters
33.88“
(86cm)
2”
Casters
31.88“
(81cm)
8 Part Number GUC_SM 12/16
Section 2 Installation
Work Top with Door Models
RefrigeratorFreezerVolume
3
GUR24(B)P-S,
GUR24(B)P-G
GUR27(B)P-S,
GUR27(B)P-G
GUR32(B)P-S,
GUR32(B)P-G
GUR48(B)P-S,
GUR48(B)P-G
GUR60(B)P-S,
GUR60(B)P-G
GUR72(B)P-S,
GUR72(B)P-G
Work Top with Drawers Models
RefrigeratorFreezerQuantity of
GUR24(B)P-DNA8
GUR27(B)P-DGUF27(B)P-D12
GUR32(B)P-DGUF32(B)P-D12
GUR48(B)P-DNA16
GUR60(B)P-DGUF60(B)P-D24
GUR72(B)P-DNA24
NA4.1 ft
GUF27(B)P-S4.8 ft
GUF32(B)P-S5.8 ft
GUF48(B)P-S9.2 ft
GUF60(B)P-S11.7 ft
NA14.2 ft
1/6 Size x 6” Deep
(116 L)
3
(136 L)
3
(164 L)
3
(261 L)
3
(331 L)
3
(402 L)
Pans
Electrical Service
DANGER
Check all wiring connections, including factory
terminals, before operation. Connections can become
loose during shipment and installation.
Warning
n
This appliance must be grounded and all field wiring
must conform to all applicable local and national
codes. Refer to rating plate for proper voltage. It is the
responsibility of the end user to provide the disconnect
means to satisfy the authority having jurisdiction.
VOLTAGE
All electrical work, including wire routing and grounding,
must conform to local, state and national electrical codes.
The following precautions must be observed:
• The equipment must be grounded.
• A separate fuse/circuit breaker must be provided for
each unit.
• Check all green ground screws, cables and wire
connections to verify they are tight before start-up.
FUSE/CIRCUIT BREAKER
A separate fuse/circuit breaker must be provided for each
unit.
GROUND FAULT CIRCUIT INTERRUPTER
Ground Fault Circuit Interrupter (GFCI/GFI) protection is
a system that shuts down the electric circuit (opens it)
when it senses an unexpected loss of power, presumably
to ground. Manitowoc does not recommend the use of
GFCI/GFI circuit protection to energize our equipment.
If code requires the use of a GFCI/GFI then you must
follow the local code. The circuit must be dedicated, sized
properly and there must be a panel GFCI/GFI breaker. We
do not recommend the use of GFCI/GFI outlets to energize
our equipment as they are known for more intermittent
nuisance trips than panel breakers.
Part Number GUC_SM 12/16 9
Installation Section 2
RATED AMPERAGES, HORSEPOWER, VOLTAGE &
POWER CORD CHART
Maximum 8ft (2.4m) cord with plug.
ModelAmpsHPVoltage, Cycle, PhaseNEMA Plug
GUR24(B)P-S,
GUR24(B)P-G,
GUR24(B)P-D
GUR27(B)P-S,
GUR27(B)P-G,
GUR27(B)P-D
GUF27(B)P-S,
GUF27(B)P-D
GUR32(B)P-S,
GUR32(B)P-G,
GUR32(B)P-D
GUF32(B)P-S,
GUF32(B)P-D
GUR48(B)P-S,
GUR48(B)P-G,
GUR48(B)P-D
GUF48(B)P-S6.41/3115V, 60Hz, 1Ph5-15P
GUR60(B)P-S,
GUR60(B)P-G,
GUR60(B)P-D
GUF60(B)P-S,
GUF60(B)P-D
GUR72(B)P-S,
GUR72(B)P-G,
GUR72(B)P-D
3.21/5115V, 60Hz, 1Ph5-15P
3.21/5115V, 60Hz, 1Ph5-15P
2.61/4115V, 60Hz, 1Ph5-15P
3.21/5115V, 60Hz, 1Ph5-15P
2.61/4115V, 60Hz, 1Ph5-15P
3.21/5115V, 60Hz, 1Ph5-15P
3.21/5115V, 60Hz, 1Ph5-15P
6.41/3115V, 60Hz, 1Ph5-15P
3.21/5115V, 60Hz, 1Ph5-15P
10 Part Number GUC_SM 12/16
Section 2 Installation
Drain Connections
Warning
n
Moisture collecting from improper drainage can create a
slippery surface on the floor and a hazard to employees.
It is the owner’s responsibility to provide a container or
outlet for drainage.
Refrigeration
ModelBTU/Hour
Capacity
GUR24(B)P-S27014778
GUR24(B)P-G30018578
GUR24(B)P-D32017378
GUR27(B)P-S28015778
GUR27(B)P-G33019578
GUR27(B)P-D32018678
GUF27(B)P-S40029162
GUF27(B)P-D56041062
GUR32(B)P-S31017278
GUR32(B)P-G36021078
GUR32(B)P-D36020878
GUF32(B)P-S45032562
GUF32(B)P-D64046662
GUR48(B)P-S47027078
GUR48(B)P-G56034678
GUR48(B)P-D56032578
GUF48(B)P-S680479111
GUR60(B)P-S53030778
GUR60(B)P-G63038378
GUR60(B)P-D63037778
GUF60(B)P-S790559111
GUF60(B)P-D1140831111
GUR72(B)P-S63036578
GUR72(B)P-G78047978
GUR72(B)P-D74044978
Heat of
Rejection
Charge
Leveling
After the cabinet has been placed in the desired location,
cabinets with legs must be leveled. Level units from front to
back and from side to side. Leveling will insure proper door
operation and removal of condensate. Cabinets with casters
must have the caster brake set so the cabinet cannot move.
Stabilizing
It is very important that all legs are properly adjusted to
keep the cabinet level, evenly distribute the weight and to
make sure the unit will not rock, lean or be unstable.
Leg & Caster Installation
DANGER
Legs or casters must be installed and the legs or casters
must be screwed in completely to prevent bending.
When casters are installed the mass of this unit will
allow it to move uncontrolled on an inclined surface.
These units must be tethered/secured to comply with
all applicable codes.
Warning
n
The unit must be installed in a stable condition with
the front wheels locked. Locking the front casters after
installation is the owner’s and operator’s responsibility.
Warning
n
Use a jack to lift the refrigeration unit off the ground
just far enough to remove the leg/caster. Place blocking
underneath the unit. Do not work underneath a raised
unit without proper blocking. Do not lift the unit more
than necessary to remove the leg/caster. Lifting the unit
too far can make the unit unstable.
Caution
,
All single-section units require that the swivel casters be
mounted on the front and rigid casters be mounted on
the rear.
Part Number GUC_SM 12/16 11
Installation Section 2
To install the legs or casters:
1. Remove unit from skid.
2. Raise unit to access leg/caster mounting holes on
bottom of unit.
3. Attach the legs or casters to bottom of cabinet using
hex head bolts.
4. This last step applies only to single section units with 2”
casters. While the unit is raised, mount an air divider on
the bottom. It runs front to back down the center and
has two holes for mounting.
Optional Overshelf Installation Instructions
13.33“
(34cm)
7.50“
(19cm)
7.50“
(19cm)
1.00“
(2.5cm)
If the unit is ordered to have the overshelf:
1. Remove the three screws from each top side of the
cabinet (total six screws).
2. Set the overshelf in-place on the top of the cabinet.
3. Line up the three overshelf holes with the unit holes.
4. Secure with three screws per side of the cabinet (total
six screws).
If the overshelf was not ordered with the unit:
1. Set the overshelf in-place on the top of the cabinet.
2. Secure with three screws per side of the cabinet (total
six screws).
12 Part Number GUC_SM 12/16
Section 3
Operation
DANGER
Do not operate any appliance with a damaged cord
or plug. All repairs must be performed by a qualified
service company.
DANGER
Never stand on the unit! They are not designed to
hold the weight of an adult, and may collapse or tip if
misused in this manner.
Warning
n
Do not contact moving parts.
Warning
n
All covers and access panels must be in place and
properly secured, before operating this equipment.
Warning
n
Do not use electrical appliances inside the food storage
compartment of this appliance.
Warning
n
The operator of this equipment is solely responsible
for ensuring safe holding temperature levels for all
food items. Failure to do so could result in unsafe food
products for customers.
Warning
n
Overloading shelves can damage equipment or cause
bodily injury.
Warning
n
Damp or wet hands may stick to cold surfaces.
Caution
,
Do not block the supply and return air grills or the air
space around the air grills. Keep plastic wrappings,
paper, labels, etc. from being airborne and lodging in
the grills. Failure to keep the air grills clear will result in
unsatisfactory operation of the system.
Caution
,
Do not throw items into the storage area. Failure to
heed this recommendation could result in damage to
the interior of the cabinet or to the blower coil.
R290 Controls/Programming/Settings
V
V
Standard Control Panel
V
V
Freezer Control Panel With Optional Power Switch
R290 Refrigerator
Refrigerators are factory set at mid-range to maintain about
38ºF (3ºC) box temperature.
1. At initial start-up or anytime power is disconnected,
then reconnected to the unit, the control will go into
defrost mode.
2. The control will enter a DEFROST mode and the display
will read dEF. The compressor and condenser fan as
well as the evaporator fan will remain off until this
initial defrost is complete. This initial defrost cycle may
take up to 35 minutes to complete.
3. The display will continue to read dEF for an additional
30 minutes while the cooling cycle cools the box to the
set temperature.
4. Then the digital thermostat will display box
temperature.
5. The temperature control will cycle the compressor,
evaporator fan motor and condenser fan motor to
maintain box temperature at the control setting. For
more information see “R290 Evaporator Fan Operation”
on page 15.
R290 Refrigerator Defrost
The temperature control also monitors the evaporator
temperature and will turn off the compressor and
condenser fan motor when needed to allow accumulated
frost on the evaporator to clear. During this defrost cycle,
the digital temperature display will read dEF. After the
defrost cycle is complete, the temperature control will
return to a normal cooling cycle, but the display will
continue to read dEF until the evaporator returns to normal
cooling temperatures (up to 30 minutes).
Part Number GUC_SM 12/16 13
Operation Section 3
R290 Freezer
Freezers are factory set at mid-range to maintain about -3ºF
(-19ºC) box temperature.
1. At initial start-up or anytime power is disconnected,
then reconnected to the unit, the control will go into
defrost mode
2. The control will enter a DEFROST mode and the display
will read dEF. The compressor and condenser fan as
well as the evaporator fan will remain off until this
initial defrost is complete. This initial defrost cycle may
take up to 35 minutes to complete.
3. The display will continue to read dEF for an additional
30 minutes while the freezing cycle cools the box to the
set temperature.
4. Then the thermostat will display box temperature.
5. The temperature control will cycle the compressor,
evaporator fan motor and condenser fan motor to
maintain box temperature at the control setting. For
more information see “R290 Evaporator Fan Operation”
on page 15.
R290 Freezer Automatic Defrost
The control also monitors compressor total running time
and will enter a defrost cycle after total compressor running
time is greater than seven hours since the last defrost cycle
OR if evaporator coil temperature drops below -30ºF (-34ºC)
(indicating excessive frost on the coil).
R290 Freezer Manual Defrost
If a manual defrost is desired, hold the upper left button for
five seconds or unplug the unit for several seconds, then
plug unit back in. This will cause the control to re-initialize
and then enter a defrost cycle.
When the control enters the defrost mode, it switches off
the evaporator fan motor, compressor and condenser fan
motor, and switches on the defrost heater to warm the
evaporator coil. Thereby melting all frost accumulated
during the previous refrigeration cycle. The digital
temperature display will now read dEF. The control will
continue the defrost cycle for a MINIMUM of six minutes
and a MAXIMUM of 35 minutes depending on the amount
of frost accumulated on the evaporator coil.
After the defrost cycle is complete, the control returns
to a normal refrigeration cycle, however the evaporator
fan motor will not switch on until the evaporator reaches
-5°F (-21°C) or two minutes AFTER the compressor and
condenser fan motor have begun operating. The digital
temperature display will continue to read dEF until the
evaporator has returned to normal freezing temperatures
(up to 30 minutes).
14 Part Number GUC_SM 12/16
Section 3 Operation
R290 TEMPERATURE CONTROL & DISPLAY
Operation / Indication
StatusDisplayedComments
Normal (°C)Temp. [°C]Unit depends on setting
Normal (°F)Temp. [°F]
Show set-pointTemp.
Set to DefrostdEF / TempDepends on setting
Sensor 1 defectE01Air sensor
Sensor 2 defectE02Coil sensor
High temperature alarmHiAutomatically switching
Low temperature alarmLo
Line voltage too hightuHi
Line voltage too lowuLi
(parameters in control)
(parameters in control
or as chosen by upper
left button)
at 2 sec rate
R290 Temperature Control & Display Operation
V
V
R290 Power Switch
Select units are equipped with a power disconnect switch
located behind the louvered panel. Switch must be in the
on position for the unit to operate. If the switch is turned
off, then returned to the on position, the unit will enter a
defrost cycle and the display will read dEF.
R290 Energy Saver Switch
Select freezers are equipped with an energy saver switch
for service use. It is a rocker switch located behind the
mechanical raceway that controls the amount of heat
applied to the door perimeter. The normal operating
position for this switch is the on position, providing the
least heat. If excessive condensation is observed on the
door opening, switch to the off position with the help of an
authorized service agent. The off position will increase the
heat.
R290 Temperature Alarm
The alarm will flash “HI” or “LO” 90 minutes after the unit
has reached its alarm temperature point or after any
power interruption if the temperature is above or below
the alarm set points. Refrigerators are factory set at midrange to maintain about 38ºF (3ºC) box temperature. The
high refrigerator temperature point is 50°F (10°C). The low
refrigerator temperature point is 25°F (-4°C). Freezers are
factory set at mid-range to maintain about -3ºF (-19ºC) box
temperature. The high freezer temperature point is 20°F
(-7°C). Freezers do not have a low temperature point.
Press upper or lower right button.
• Display show actual set-point (blinking).
• If buttons untouched for 3 seconds returns to
normal.
• Increase set-point by pressing upper button. Max value
depends on parameters in control.
• Decrease set-point by pressing lower button. Min value
depends on parameters in control.
• If buttons untouched for 3 seconds returns to
normal and stores new set-point.
Press upper left button for 5 seconds.
• Start defrost.
Press lower left button for 5 seconds.
• Unit goes into stand-by mode.
• The display will read off, then a period.
• Press the lower left button again for 5 seconds.
• The display will read on.
• The unit will then start up in the defrost mode,
and display will read dEF.
R290 EVAPORATOR FAN OPERATION
During normal operation the evaporator fan may cycle
and/or pulse independently of the compressor. Consult
Technical Support at 1-844-724-CARE if you are unsure of
the proper function.
Cooling CycleDefrost Cycle
Compressor OnCompressor
Off
Off
Evap Fan OnEvap Fan
RefrigeratorXCycles On 2-Min,
FreezerXXX
On
Evap Fan
Off 2-Min
Off
Evap Fan
Compressor
Off
Evap Fan OnEvap Fan
X
Off
Part Number GUC_SM 12/16 15
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