Middleby 20036SB User manual

Installation, Operation &
Maintenance Manual
Refrigerated Base – Self-Contained
1100 Old Honeycutt Road, Fuquay-Varina, NC 27526
919-552-9161 • 800-348-2558 • 919-552-9798 (fax) • 800-238-8444 (after hours)
Printed in USA 12/02
MODELS
20036SB 20084SB
20048SB 20096SB
20060SB 20108SB
20072SB 20120SB

2Printed in USA 12/02 Refrigerated Base-Self-Contained © 2002
INTRODUCTION
GENERAL INFORMATION
This technical manual provides information for the installation,
operation, maintenance, and inspection of this unit
manufactured by Middleby. A complete parts breakdown
is also provided.
TECHNICAL SUPPORT
For any questions regarding the installation, operation or
maintenance of the unit, contact the factory at the following
address:
Technical Service Department
Middleby
1100 Honeycutt Road
Fuquay-Varina, NC 27526
SCOPE OF THE MANUAL
This manual provides sufficient information for maintenance
of the equipment.
EQUIPMENT DESCRIPTION
The unit consists of the following parts:
• Storage compartment - The insulated food storage
compartment is clear storage area. The cooling coil
(evaporator) is contained in this area.
• Drawers - Product is stored by means of food pans set in
drawers. The drawer face is made of an insulated panel.
The drawer face (panel) is fully “gasketed”
to provide a tight seal against the cabinet.
• Condensing Unit Compartment - This area contains
the condensing unit(s) along with the necessary controls
and other components.
• Evaporator Coil - The evaporator coil is located in the
storage compartment and is responsible for distributing
the cold air associated with the refrigeration system.
• Cabinet - The cabinet is the enclosure in which all
of the above mentioned items are housed.
EQUIPMENT SUPPLIED
The unit is shipped from the factory assembled. The
complete assembly is palletized and crated to minimize
the possibility of damage in shipping and storage.
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Electrical and Mechanical . . . . . . . . . . . . . . . . . . . . . . . . .24
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
NOTICE! MIDDLEBY RESERVES THE RIGHT
TO CHANGE SPECIFICATIONS AND PRODUCT DESIGN
WITHOUT NOTICE. SUCH REVISIONS DO NOT ENTITLE
THE BUYER TO CORRESPONDING CHANGES,
IMPROVEMENTS, ADDITIONS OR REPLACEMENTS
FOR PREVIOUSLY PURCHASED EQUIPMENT.

Self-Contained, Refrigerated Bases
SAFETY
3
Printed in USA 12/02 Refrigerated Base-Self-Contained © 2002
DANGER
EXPLOSION HAZARD
If gas odor is detected, shut down equipment at the main
shutoff valve. Immediately call the emergency phone
number of your gas supplier.
SPECIFICATIONS
SAFETY NOTICES
DANGER
This symbol warns of immediate hazards which WILL
result in severe injury or death.
WARNING
FIRE HAZARD
For your safety, do not store or use gasoline or other
flammable vapors and liquids in the vicinity of this or any
other appliance.
Keep area around appliances free and clear of
combustibles.
WARNING
Asphyxiation can result from improper ventilation. Do
not obstruct the flow of combustion and ventilation air to
/and from your cooking equipment.
WARNING
This symbol refers to a potential hazard or unsafe
practice which COULD result in injury or death.
CAUTION
This symbol refers to a potential hazard or unsafe
practice which COULD result in injury, product or
property damage.
NOTICE! This symbol refers to information that requires
special attention or must be fully understood, even
though not dangerous.
SAFETY PRECAUTIONS
NOTICE! Post the emergency telephone number of your
gas supplier and instructions to follow if gas odor is
detected.
NOTICE! Be sure this manual and important papers are
given to the proper authority to retain for future
reference.
Model W D H* Drawers No. of Ref. Elec. Compressor Evap. Amps Shipping
Number Pans Volume V/Ph/Hz HP BTU Weight
12"x20"x4" (cu.ft.) (lbs.)
18" 26" 31"
20036SB
20048SB
20060SB
20072SB
20084SB
20096SB
20108SB
20120SB
36"
48"
60"
72"
84"
96"
108"
120"
2
-
-
-
-
2
-
4
-
2
-
4
-
4
6
4
-
-
2
-
4
-
-
-
2
4
4
8
8
10
12
12
5.9
8.6
12
15.5
19.3
22.5
24
29.2
1/4
1/4
1/4
1/3
1/3
1/2
1/2
1/2
6
6
6
7
7
7
7
7
310
410
530
650
740
840
960
1050
1100
1100
1100
1600
1600
1600
1600
1600
115/1/60
115/1/60
115/1/60
115/1/60
115/1/60
115/1/60
115/1/60
115/1/60
32"
32"
32"
32"
32"
32"
32"
32"
26"
26"
26"
26"
26"
26"
26"
26"
*Includes 6" legs or casters
Figure 1.1 - General Arrangement Picture
Table 1.1 - Leading Particulars

4Printed in USA 12/02 Refrigerated Base-Self-Contained © 2002
OPERATION
INTRODUCTION
This model is a heavy-duty piece of equipment designed for
continuous use. It incorporates automatic controls to regulate
the cycling of the refrigeration system.
CONTROLS AND INDICATORS
Table 2.1 - Controls and Indicators
NAME TYPE FUNCTION
Low Pressure Switch Contact Points Cycles the refrigerator system (automatic)
Suction Valve Manual Plunger Valve Isolate suction at the compressor
Discharge Valve Manual Plunger Valve Isolate discharge line at receiver
Power Control Switch (On/Off) Contact Points Terminates all of the electrical into and past
the supply cord
Thermostat Contact Points Cycles the refrigerator system (automatic)
Defrost Timer1Contact Points Controls scheduled evaporator coil defrosting
Solenoid Valve Automatic Plunger Shuts off refrigerant flow
1Freezers

OPERATION
5
Printed in USA 12/02 Refrigerated Base-Self-Contained © 2002
START-UP PROCEDURE
The refrigeration system is completely factory assembled,
pre-charged and ready for operation. To energize the system
it is only necessary to find the power supply cord and
connect it to a proper electrical source. Once the supply cord
SHUT-DOWN PROCEDURE
To shut down, disconnect the electrical supply cord and open
or remove the drawer(s) allowing the interior cabinet
temperature to equalize with the room temperature. A mild
detergent diluted in warm water should be used to wash
down the interior and exterior surfaces of the cabinet.
Table 2.2 - Start-up Procedure (Refrigerated Storage)
Operation Results
1. Activate system by inserting electrical service cord into
electrical supply source and flip power control switch.
2. Locate liquid refrigerant indication glass mounted on
the receiver.
3. Wait 15 minutes.
4. Wait 3 hours.
Compressor should immediately come on line along with the
condenser fan and the evaporator fan.
Once the system has been operating for two minutes, the
glass should appear clear and full of liquid refrigerant.
The temperature in the storage area should begin to
approach the “green zone” on the thermometer indicating
adequate operation.
Once the operating temperature has been reached, stocking
of the containment area can begin.
has been connected to a power source, the unit can be
started by flipping the power control switch to the “ON”
position.
WARNING
Prior to any cleaning of the system involving placing
hands in areas with moving parts, the system should
be deactivated by disconnecting the power supply cord.
Table 2.3 - Shut Down Procedures
Operation Results
1. De-energize the system by flipping the power control
switch to the “OFF” position and disconnecting the
electrical supply cord.
Once the system is de-energized, the condenser fan and the
evaporator fan will cease operation.