Alto-Shaam 500-1D Owner's manual

#818 • 8/07
W 1 6 4 N 9 2 2 1 W a t e r S t r e e t • P. O . B o x 4 5 0 • e n o m o n e e F a l l s , W i s c o n s i n 5 3 0 5 2 - 0 4 5 0 U S A
PHONE: [phone] • 800.558.8744 USA/CANADA FAX: [phone] • 800.329.8744 U.S.A.ONLY
WEBSITE: www.alto-shaam.com
P R I N T E D I N U .S.A.
®
D r a w e r W a r m e r s
E l e c t r i c
MANUAL r
ELECTRONIC CONTROL
M dels:
500-1D, 1DN
500-2D, 2DN
500-3D, 3DN
• INSTALLATION
• OPERATION
• MAINTENANCE

D E L I V E RY
This Alto-Shaam appliance has been
thoroughly tested and inspected to insure only the
highest quality unit is provided. Upon receipt,
check for any possible shipping damage and
report it at once to the delivering carrier. See
Transportation Damage and Claims section
located in this manual.
This appliance, complete with unattached
items and accessories, may have been delivered in
one or more packages. Check to ensure that all
standard items and options have been received
with each model as ordered.
Save all the information and instructions
packed with the appliance. Complete and return
the warranty card to the factory as soon as
possible to assure prompt service in the event of a
warranty parts and labor claim.
This manual must be read and understood by
all people using or installing the equipment
model. Contact the Alto-Shaam service
department if you have any questions concerning
installation, operation, or maintenance.
NOTE: All claims for warranty must include the
full model number and serial number of
the unit.
U N PA C K I N G
1. Carefully remove the
appliance from the
carton or crate.
NOTE: Do not discard the
carton and other
packaging material
until you have
inspected the unit
for hidden damage
and tested it for
proper operation.
2. Read all instructions in this manual carefully
before initiating the installation of this appliance.
DO NOT DISCARD THIS MANUAL.
This manual is considered to be part of the
appliance and is to be provided to the owner
or manager of the business or to the person
responsible for training operators. Additional
manuals are available from the Alto-Shaam
service department.
3. Remove all protective plastic film, packaging
materials, and accessories from the appliance
before connecting electrical power. Store any
accessories in a convenient place for future use.
®
®
®
#818 Installation/Operation/Service Manual 1.

SAFETY PROCEDURES
AND PRECAUTIONS
Knowledge of proper procedures is essential to the
safe operation of electrically and/or gas energized
equipment. In accordance with generally accepted
product safety labeling guidelines for potential
hazards, the following signal words and symbols
may be used throughout this manual.
Used to indicate the
presence of a hazard that
will cause severe personal
injury, death, or substantial
property damage if the
warning included with this
symbol is ignored.
Used to indicate the
presence of a hazard that
c n cause personal injury,
possible death, or major
property damage if the
warning included with this
symbol is ignored.
Used to indicate the
presence of a hazard that
can or will cause minor or
moderate personal injury
or property damage if the
warning included with this
symbol is ignored.
Used to indicate the
presence of a hazard that
can or will cause minor
personal injury, property
damage, or a potential
unsafe practice if the
warning included with this
symbol is ignored.
Used to notify personnel of
installation, operation, or
maintenance information that is
important but not hazard related.
1.This appliance is intended to cook, hold or
process foods for the purpose of human
consumption. No other use for this
appliance is authorized or recommended.
2. This appliance is intended for use in
commercial establishments where all
operators are familiar with the purpose,
limitations, and associated hazards of this
appliance. Operating instructions and
warnings must be read and understood by
all operators and users.
3. Any troubleshooting guides, component
views, and parts lists included in this manual
are for general reference only and are
intended for use by qualified technical
personnel.
4. This manual should be considered a
permanent part of this appliance. This
manual and all supplied instructions,
diagrams, schematics, parts lists, notices, and
labels must remain with the appliance if the
item is sold or moved to another location.
NOTE:
#818 Installation/Operation/Service Manual 2.

1. The cabinet, complete with unattached items and
accessories, may be delivered in one or more
packages. Check to ensure all accessories ordered
have been received.
2. This appliance is designed for the purpose of
maintaining hot food at a temperature for safe
consumption. The unit must be installed on a
level surface in a location that will permit the
equipment to function for its intended purpose
and allow adequate access for proper cleaning
and maintenance.
3. The appliance must not be installed in any area
where it will be affected by steam, grease,
dripping water, high temperatures, or any other
severely adverse conditions.
4. Level the appliance from side-to-side and
front-to-back with the use of a spirit level.
5. In order to maintain standards established
by the National Sanitation Foundation, all
equipment must be equipped with casters or
4" (102mm) legs to provide minimum
unobstructed space beneath the unit; or secured
flush at the bottom and the entire base sealed
with NSF approved sealant. Warranty will
become null and void if these directions are
not followed.
#818 Installation/Operation/Service Manual 3.
I N S TA L L AT I O N
Site Inst ll tion
CLEARANCE REQUIREMENTS
3-inches (76mm) at the back
2-inches (51mm) at the top
1-inch (25mm) at both sides
On site venting for proper airflow must also be
provided for built-in counter installations.
TO PREVENT PERSONAL INJURY,
USE CAUTION WHEN MOVING OR
LEVELING THIS APPLIANCE.
WEIGHT
500-1D 500-2D 500-3D
NET 80 lb (36 kg) 115 lb (52 kg) 150 lb (68 kg)
SHIP 90 lb (41 kg) 125 lb (57 kg) 165 lb (75 kg)
WEIGHT
500-1DN 500-2DN 500-3DN
NET 67 lb (30 kg) 100 lb (45 kg) EST.130 lb (59 kg) EST.
SHIP 75 lb (34 kg) 112 lb (51 kg) 145 lb (66 kg)

#818 Installation/Operation/Service Manual 4.
I N S TA L L AT I O N
500-1D
500-2D
500-3D 1-11/16" (42mm)
C
L
24-3/8" (618mm)
40-1/16" (1018mm)
22-13/16" (579mm)
11-3/4" (298mm)
19" (482mm)
26-1/8" (663mm)
ELECTRICAL CONNECTION
ELECTRICAL CONNECTION
HI-LO Switch available only on 500 -1D and 500 -2D.
6-3/4" (171mm)
FOR LEG STAND OR CASTER STAND ASSEMBLY
24-5/8" (625mm)
HANDLE
Exterior Dimensions - 500-1D, 500-2D, 500-3D
O P T I O N S & A C C E S S O R I E S
Built-in Trim Kit
500-1D 44224
500-2D 44226
500-2D FOR BU2-48, BU2-72 55532
500-2D FOR BU2-96 44231
500-3D 44228
Caster Stand Assembly 15379
Drawer Assembly with vents 55536
Leg Stand Assembly 15380
Pan, oversize, 15" x 20" x 5" (381 x 508 x 127 mm) PN-2123
Perforated pan grid, 15" x 20" (381 x 508 mm) 1231
Perforated pan grid, 12" x 20" (305 x 508 mm) 16642

#818 Installation/Operation/Service Manual 5.
I N S TA L L AT I O N
Exterior Dimensions - 500-1DN, 500-2DN, 500-3DNN
500-1DN
500-2DN
500-3DN 1-11/16" (42mm)
C
L
16-7/16" (418mm)
50-7/8" (1291mm)
28-1/8" (714mm)
11-11/16" (296mm)
18-7/8" (479mm)
26-3/16" (663mm)
ELECTRICAL CONNECTION
ELECTRICAL CONNECTION
HI-LO Switch available only on 500-1DN and 500-2DN.
6-3/4" (171mm)
FOR LEG STAND OR CASTER STAND ASSEMBLY
29-15/16" (761mm)
HANDLE
O P T I O N S & A C C E S S O R I E S
Built-in Trim Kit
500-1DN 44225
500-2DN 44227
500-3DN 44229
Caster Stand Assembly 55534
Drawer Assembly with vents 55537
Leg Stand Assembly 55535
Perforated pan grid, 12" x 20" (305mm x 508mm) 16642

#818 Installation/Operation/Service Manual 6.
I N S TA L L AT I O N
Manual Control, 120V Unit
Manual Control, 208-240V, 230V Units
Drawer Bearing Drawer Rail
Stud & Nut
Thermostat Knob Temperature
Gauge
High Limit Switch Heat Indicator
Light
Panel Overlay
Panel Overlay
Drawer Assembly
Electronic Control
Panel Overlay

1. An identification tag is permanently mounted on
the cabinet.
2. Plug cabinet into a properly grounded receptacle
ONLY, positioning the unit so the power supply
cord is easily accessible in case of an emergency.
Arcing will occur when connecting or
disconnecting the unit unless all controls are in
the “OFF” position.
3. If necessary, a proper receptacle or outlet con-
figuration as required for this unit, must be
installed by a licensed electrician in accordance
with applicable, local electrical codes.
230V:
To prevent an electrical shock hazard between the
appliance and other appliances or metal parts in
close vicinity, an equalization-bonding stud is
provided. An equalization bonding lead must be
connected to this stud and the other appliances /
metal parts to provide sufficient protection against
potential difference. The terminal is marked with
the following symbol.
NOTE: The appliance must be connected to an
electrical circuit that is protected by an external
GFCI outlet.
#818 Installation/Operation/Service Manual 7.
I N S TA L L AT I O N
ELECTRICAL
NEMA 5-15P
15A, 125V PLUG
NEMA 6-15P
15A, 250V PLUG
FOR USA ONLY
CEE 7/7,
220-230V PLUG
ELECTRICAL - 500-1DN; 500-2DN; 500-3DN
VOLTAGE PHASE CYCLE/HZ AMPS kW
120 1 60 LOW 4.0 0.5
HIGH 8.5 1.05
at 208 1 50/60 4.0 0.8
at 240 1 50/60 4.5 1.05
230 1 50/60 4.2 0.97
NEMA 5-15P
15A, 125V PLUG
NEMA 6-15P
15A, 250V PLUG
FOR USA ONLY
CEE 7/7,
220-230V PLUG
ELECTRICAL - 500-1D; 500-2D; 500-3D
VOLTAGE PHASE CYCLE/HZ AMPS kW
120 1 60 LOW 4.0 0.5
HIGH 8.5 1.05
at 208 1 50/60 4.0 0.8
at 240 1 50/60 4.5 1.05
230 1 50/60 4.2 0.97

This appliance is intended for use in commercial
establishments where all operators are familiar
with the purpose, limitations, and associated
hazards of this appliance. Operating instructions
and warnings must be read and understood by all
operators and users.
1. M ke sure the unit is connected to the
ppropri te power source.
2. Use h nd protection when h ndling
hot items.
3. Prehe t the unit for 30 minutes before use.
4. Be cert in only hot foods re pl ced
into the unit.
BEFORE INITIAL USE:
Before operating the unit, clean both the interior
and exterior of the unit with a clean, damp cloth
and mild soap solution. Rinse carefully. Clean and
install the drawer warmer pan(s). The drawer
assembly is completely removable. Clean as a
sanitation measure.
HEATING CHARACTERISTICS
The drawer warmer is equipped with a special
heating cable. Through this Halo Heat concept,
the heating cable is mounted against the walls of the
unit to provide an evenly applied heat source
controlled by a thermostat. The design and
operational characteristics of the unit eliminate the
need for a moisture pan or a heat circulating fan.
Through even heat application, the quality of food
products is maintained up to several hours or more.
FOOD PRODUCT TIPS
Bread and Rolls
Breads and rolls are traditionally difficult to hold
for prolonged periods due to the very low
moisture content of these products. For best
results and longest possible holding life, it is
recommended these products be placed in a
plastic bag while in the warming drawer. Breads
and rolls should be held at a temperature no
higher than 120° to 140°F (49° to 60°C).
Potatoes
— for the best results when holding potatoes:
1. Do not overcook.
Regardless of the temperature at which potatoes
are cooked or what type of oven is used, it is
important that this product does not achieve a
final internal product temperature in excess of
195°F (91°C). Over-cooking will further reduce
the moisture content and consequently, reduce
the holding life. Potatoes should be removed
from the oven when they reach an internal
temperature of approximately 190°F (88°C).
After they are removed from the oven, the
internal temperature will continue to increase.
2. Allow potatoes to stabilize before placing
in drawer warmer.
When potatoes are removed from a conventional
high-temperature oven, they have an extremely
high surface temperature. If they are placed in
the drawer warmer while they are this hot on the
outside, moisture will be pulled from the inside of
the potato and condensation will form on the
outside. Holding results under these conditions
will not be totally satisfactory. Remove potatoes
from the oven and allow the surface temperature
to stabilize before placing them in the controlled
holding atmosphere of the drawer warmer.
#818 Installation/Operation/Service Manual 8.
I N S TA L L AT I O N
USER SAFETY INFORMATION
P R O D U C T C A PA C I T Y
20 lbs (9 kg) AXI U •EACH DRAWER
(34 BAKED POTATOES, 50 DINNER ROLLS)

1. Dual wattage control.
The one and two drawer, 120V warmers are
provided with a HIGH/LOW power switch.
Use the HIGH position at 1000 watts for meats,
potatoes, and vegetables — use the LOW
position at 500 watts for breads and rolls.
2. Preheat at 200 F (93 C) for 30 minutes.
When the thermostat is turned clockwise to an
“ON” position, the indicator light will illuminate
and will remain lit as long as the unit is calling
for heat. Allow a minimum of 30 minutes of
preheating before loading the warmer with food.
The indicator light will go “OUT” after
approximately 30 minutes, or when the air
temperature inside the unit reaches the
temperature set by the operator.
3. Load the drawer warmer with pans of
hot food only.
The purpose of the unit is to maintain hot food
at proper serving temperatures. Only hot food
should be placed into the warmer. Before
loading the unit with food, use a food
thermometer to make certain all food products
are at an internal temperature range of
140° to 160°F (60° to 71°C). All food not
within the proper temperature range should be
heated before putting into the drawer warmer.
4. Reset the thermostat to 160 F (71 C).
Check to make certain the drawer is
securely closed, and reset the thermostat to
160°F (71°C).
THIS WILL NOT NECESSARILY BE THE
FINAL SETTING.
The proper temperature range for the food being
held will depend on the type and quantity of
product. When holding food for prolonged
periods, it is advisable to periodically check the
internal temperature of each item to assure
maintenance of the proper temperature range.
#818 Installation/Operation/Service Manual 9.
MANUAL CONTROL
O P E R AT I O N
DUAL WATTAGE CONTROL
120V ONLY
THER OSTAT
TE PERATURE
GAUGE
HEAT INDICATOR LIGHT

#818 Installation/Operation/Service Manual 10.
O P E R AT I O N - ELECTRONIC CONTROL
POWER INDICATOR LIGHT
UP/DOWN
ARROWS
ON/OFF POWER KEY LOCK INDICATOR
LED DISPLAY
HEAT INDICATOR
LIGHT
ON/OFF KEY
Press the on/off key once and the power indicator light will
illuminate. Press and hold the on/off key until the LED
display turns off (at least three seconds) and on/off indicator goes
out.
UP/DOWN ARROW KEY
The up and down arrow keys are used for a variety of settings
when selecting the holding temperature. If an arrow key is pressed
and released the display will show the current set temperature for
two seconds. If an arrow key is held (at least eight seconds), the
value will change at a rapid rate. If the arrow key is pressed and
released in rapid succession, the set temperature will change by
increments of one degree.
ENABLE/DISABLE BEEPER
A beeper sounds when an error code is displayed.
To choose between beeper on and beeper off mode, the
control must be OFF, then press and hold the down arrow
key until either "ON" or "OFF" is shown in the LED display.
Release arrow key when desired mode is displayed.
FAHRENHEIT / CELSIUS
With the control OFF, to choose between Fahrenheit and Celsius,
press and hold the up arrow key until either °F or °C is shown
in the LED display. Release key when desired setting is displayed.
The control has a four-digit LED display. When the display
is ON, it will show current holding temperature, as well as
diagnostic information.
CONTROL LOCK
The warmer controls can be locked so that no changes can
be made to the set temperature.
To lock the display, press and hold the ON/OFF key and
the Up Arrow key at the same time. The lock indicator will
illuminate. When the lock indicator is illuminated, additional
programming will not be functional other than the key
sequence required to unlock the panel.
To unlock the display, press and hold the ON/OFF key and
the Down Arrow key at the same time. The lock indicator
will extinguish. The panel keys will resume normal function.
1. Preheat at 200 F (93 C) for
30 minutes.
Press the ON key, and set the temperature
to 200°F (93C°) by using the UP/DOWN
arrow keys. Allow a minimum of 30
minutes preheating time before loading the
drawer warmer with food. The LED heat
indicator light will go “OUT” after
approximately 30 minutes preheat time, or
when the air temperature inside the unit
reaches the temperature set by the operator.
2. Load with pans of hot food only.
The purpose of the warmer is to maintain
hot food at proper serving temperature.
Only hot food should be placed into the
unit. Before loading with food, use a food
thermometer to make certain all products
are at an internal temperature range of
140° to 160°F (60° to 71°C). Any food
product not within the proper temperature
range should be heated before loading into
the unit.
3. Reset the control to 160 F (71 C).
Check to make certain the drawer is
securely closed, and reset to 160°F (71°C)
by using the UP/DOWN keys.
THIS WILL NOT NECESSARILY BE THE
FINAL SETTING.
The proper temperature range will depend
on the type and quantity of product. When
holding food for prolonged periods, it is
advisable to periodically check the internal
temperature of each item with a food
thermometer to assure maintenance of the
proper temperature range of
140° to 160°F (60° to 71°C).
°F /°C

#818 Installation/Operation/Service Manual 11.
O P E R AT I O N
Chefs, cooks and other specialized food service
personnel employ varied methods of cooking. Proper
holding temperatures for a specific food product must
be based on the moisture content of the product,
product density, volume, and proper serving
temperatures. Safe holding temperatures must also
be correlated with palatability in determining the length
of holding time for a specific product.
Halo Heat maintains the maximum amount of product
moisture content without the addition of water, water
vapor, or steam. aintaining maximum natural product
moisture preserves the natural flavor of the product and
provides a more genuine taste. In addition to product
moisture retention, the gentle properties of Halo Heat
maintain a consistent temperature throughout the
cabinet without the necessity of a heat distribution fan,
thereby preventing further moisture loss due to
evaporation or dehydration.
When product is removed from a high temperature
cooking environment for immediate transfer into
equipment with the lower temperature required for hot
food holding, condensation can form on the outside of
the product and on the inside of plastic containers used
in self-service applications. Allowing the product to
release the initial steam and heat produced by high
temperature cooking can alleviate this condition. To
preserve the safety and quality of freshly cooked foods
however, a maximum of 1 to 2 minutes must be the
only time period allowed for the initial heat to be
released from the product.
ost Halo Heat holding equipment is provided with
a thermostat control between 60° and 200°F
(16° to 93°C). If the unit is equipped with vents,
close the vents for moist holding and open the vents
for crisp holding.
If the unit is equipped with a thermostat indicating
a range of between 1 and 10, use a metal-stemmed
indicating thermometer to measure the internal
temperature of the product(s) being held. Adjust the
thermostat setting to achieve the best overall setting
based on internal product temperature.
H O L D I N G T E P E R A T U R E R A N G E
EAT FAHRENHEIT CELSIUS
BEEF ROAST — Rare 140°F 60°C
BEEF ROAST — ed/Well Done 160°F 71°C
BEEF BRISKET 160° — 175°F 71° — 79°C
CORN BEEF 160° — 175°F 71° — 79°C
PASTRA I 160° — 175°F 71° — 79°C
PRI E RIB — Rare 140°F 60°C
STEAKS — Broiled/Fried 140° — 160°F 60° — 71°C
RIBS — Beef or Pork 160°F 71°C
VEAL 160° — 175°F 71° — 79°C
HA 160° — 175°F 71° — 79°C
PORK 160° — 175°F 71° — 79°C
LA B 160° — 175°F 71° — 79°C
POULTRY
CHICKEN — Fried/Baked 160° — 175°F 71° — 79°C
DUCK 160° — 175°F 71° — 79°C
TURKEY 160° — 175°F 71° — 79°C
GENERAL 160° — 175°F 71° — 79°C
FISH/SEAFOOD
FISH — Baked/Fried 160° — 175°F 71° — 79°C
LOBSTER 160° — 175°F 71° — 79°C
SHRI P — Fried 160° — 175°F 71° — 79°C
BAKED GOODS
BREADS/ROLLS 120° — 140°F 49° — 60°C
ISCELLANEOUS
CASSEROLES 160° — 175°F 71° — 79°C
DOUGH — Proofing 80° — 100°F 27° — 38°C
EGGS —Fried 150° — 160°F 66° — 71°C
FROZEN ENTREES 160° — 175°F 71° — 79°C
HORS D'OEUVRES 160° — 180°F 71° — 82°C
PASTA 160° — 180°F 71° — 82°C
PIZZA 160° — 180°F 71° — 82°C
POTATOES 180°F 82°C
PLATED EALS 180°F 82°C
SAUCES 140° — 200°F 60° — 93°C
SOUP 140° — 200°F 60° — 93°C
VEGETABLES 160° — 175°F 71° — 79°C
The holding temperatures listed are suggested guidelines only.
GENERAL HOLDING GUIDELINES

#818 Installation/Operation/Service Manual 12.
C A R E a n d C L E A N I N G
PROTECTING STAINLESS STEEL SURFACES
It is important to guard against corrosion in the
care of stainless steel surfaces. Harsh, corrosive,
or inappropriate chemicals can completely destroy
the protective surface layer of stainless steel.
Abrasive pads, steel wool, or metal implements will
abrade surfaces causing damage to this protective
coating and will eventually result in areas of
corrosion. Even water, particularly hard water that
contains high to moderate concentrations of
chloride, will cause oxidation and pitting that result
in rust and corrosion. In addition, many acidic
foods spilled and left to remain on metal surfaces
are contributing factors that will corrode surfaces.
Proper cleaning agents, materials, and methods
are vital to maintaining the appearance and life of
this appliance. Spilled foods should be removed
and the area wiped as soon as possible but at the
very least, a minimum of once a day. Always
thoroughly rinse surfaces after using a cleaning
agent and wipe standing water as quickly as
possible after rinsing.
CLEANING AGENTS
Use non-abrasive cleaning products designed for use
on stainless steel surfaces. Cleaning agents must be
chloride-free compounds and must not contain
quaternary salts. Never use hydrochloric acid
(muriatic acid) on stainless steel surfaces. Always use
the proper cleaning agent at the manufacturer's
recommended strength. Contact your local cleaning
supplier for product recommendations.
CLEANING MATERIALS
The cleaning function can usually be accomplished
with the proper cleaning agent and a soft, clean
cloth. When more aggressive methods must be
employed, use a non-abrasive scouring pad on
difficult areas and make certain to scrub with the
visible grain of surface metal to avoid surface
scratches. Never use wire brushes, metal scouring
pads, or scrapers to remove food residue.
C L E A N I N G A N D P R E V E N T I V E M A I N T E N A N C E

#818 Installation/Operation/Service Manual 13.
1. Disconnect unit from power source, and let cool.
2. Remove, cover or wrap, and refrigerate food.
3. Remove drawer pans and clean separately. The
drawer assembly is completely removable. Remove
from the cabinet and clean to prevent a build-up of
food residue from interfering with the function of
the drawer assembly. Regular cleaning will help
prolong the life of these parts.
4. Clean interior metal surfaces of the unit with a
damp, clean cloth and any good commercial
detergent or grease solvent at the recommended
strength. Use a plastic scouring pad or oven cleaner
for difficult areas. Rinse carefully to remove all
residue and wipe dry.
NOTE:Avoid the use of abrasive cleaning,
compounds, chloride based cleaners, or
cleaners containing quaternary salts. Never
use hydrochloric acid (muriatic acid) on
stainless steel.
5. Wipe control panel, vents, handles, and gaskets
thoroughly since these areas harbor food debris.
6. Interior can be wiped with a sanitizing solution
after cleaning and rinsing. This solution must
be approved for use on stainless steel food
contact surfaces.
7. To help maintain the protective film coating on
polished stainless steel, clean the exterior of the
unit with a cleaner recommended for stainless steel
surfaces. Spray the cleaning agent on a cloth and
wipe with the grain of the stainless steel.
Always follow appropriate state or local health
(hygiene) regulations regarding all applicable cleaning
and sanitation requirements for foodservice equipment.
C A R E a n d C L E A N I N G
The cleanliness and appearance of this unit will contribute considerably
to operating efficiency and savory, appetizing food. Good equipment
kept clean works better and lasts longer.
TH O RO U GHLY C L EA N D AILY

#818 Installation/Operation/Service Manual 14.
Food flavor and aroma are usually so closely related
that it is difficult, if not impossible, to separate them.
There is also an important, inseparable relationship
between cleanliness and food flavor. Cleanliness, top
operating efficiency, and appearance of equipment
contribute considerably to savory, appetizing foods.
Good equipment that is kept clean, works better and
lasts longer.
ost food imparts its own particular aroma and many
foods also absorb existing odors. Unfortunately, during
this absorption, there is no distinction between GOOD
and BAD odors. The majority of objectionable flavors
and odors troubling food service operations are caused
by bacteria growth. Sourness, rancidity, mustiness,
stale or other OFF flavors are usually the result of
germ activity.
The easiest way to insure full, natural food flavor is
through comprehensive cleanliness. This means good
control of both visible soil (dirt) and invisible soil
(germs). A thorough approach to sanitation will
provide essential cleanliness. It will assure an attractive
appearance of equipment, along with maximum
efficiency and utility. ore importantly, a good
sanitation program provides one of the key elements
in the prevention of food-borne illnesses.
A controlled holding environment for prepared foods
is just one of the important factors involved in the
prevention of food-borne illnesses. Temperature
monitoring and control during receiving, storage,
preparation, and the service of foods are of equal
importance.
The most accurate method of measuring safe
temperatures of both hot and cold foods is by internal
product temperature. A quality thermometer is an
effective tool for this purpose, and should be routinely
used on all products that require holding at a specific
temperature.
A comprehensive sanitation program should focus on
the training of staff in basic sanitation procedures.
This includes personal hygiene, proper handling of raw
foods, cooking to a safe internal product temperature,
and the routine monitoring of internal temperatures
from receiving through service.
ost food-borne illnesses can be prevented through
proper temperature control and a comprehensive
program of sanitation. Both these factors are important
to build quality service as the foundation of customer
satisfaction. Safe food handling practices to prevent
food-borne illness is of critical importance to the health
and safety of your customers. HACCP, an acronym for
Hazard Analysis (at) Critical Control Points, is a quality
control program of operating procedures to assure food
integrity, quality, and safety. Taking steps necessary to
augment food safety practices are both cost effective
and relatively simple. While HACCP guidelines go far
beyond the scope of this manual, additional information
is available by contacting:
Center for Food Safety and Applied Nutrition
Food and Drug Administration
1-888-SAFEFOOD
S A N I TAT I O N
I N T E R N A L F O O D P R O D U C T T E M P E R A T U R E S
HOT FOODS
DA NG ER ZO NE 4 0° T O 140 °F (4° TO 6 0° C)
CR IT ICA L ZO NE 70° T O 120 °F ( 21 ° T O 49 °C )
SA FE Z ONE 1 40 ° TO 1 65 ° F (6 0° T O 74° C)
COLD FOODS
DANGER ZONE ABOVE 40°F (ABOVE 4°C)
SA FE ZONE 36°F TO 40°F (2°C TO 4°C)
FROZEN FOODS
DANGER ZONE ABOVE 32°F (ABOVE 0°C)
CRITICAL ZONE 0° TO 32°F (-18° TO 0°C)
SAFE ZONE 0°F OR BELOW (-18°C OR BELOW)

#818 Installation/Operation/Service Manual 15.
MANUAL CONTROL
THERMOSTAT and HEAT LIGHT SEQUENCE
Whenever the thermostat is turned “ON,” the heat indicator light will indicate the power ON/OFF condition of
the heating cable, and consequently, the cycling of the cabinet as it maintains the dialed cavity temperature. If
the light does not illuminate after normal start-up, the main power source, thermostat, and/or light must be
checked. If the warming cabinet does not hold the temperature as dialed, the calibration of the thermostat must
be checked. If the warmer fails to heat or heats continuously with the thermostat “OFF,” the thermostat must
be initially checked for proper operation. If these items are checked and found to be in order, a continuity and
resistance check of the heating cable should be made. SEE CIRCUIT DIAGRAM.
THERMOSTAT CALIBRATION
The thermostat is precision calibrated at the factory. Normally, no adjustment or recalibration is necessary
unless the thermostat has been mishandled in transit, changed or abused while in service. A thermostat with a
sensing bulb operates on hydraulic pressure, consequently, any bending of the bulb results in a change in its
volume, and alters the accuracy of the thermostat calibration.
A thermostat should be checked or recalibrated by placing a quality, thermal indicator at the center of an empty
holding cavity. DO NOT CALIBRATE WITH ANY FOOD PRODUCT IN THE CABINET. The thermostat
should be set at 140°F (60°C), and should be allowed to stabilize at that setting for a minimum of one hour.
Following temperature stabilization, the center of the thermal swing of the air temperature within the cabinet
should approximately coincide with the thermostat dial setting.
If calibration is necessary, the calibration screw should be adjusted with great care. The calibration screw of the
thermostat is located in the thermostat dial shaft. With the shaft held stationary, a minute, clockwise motion of
the calibration screw appreciably lowers the thermostat setting. A reverse, or counter-clockwise motion
appreciably raises the thermostat setting. After achieving the desired cycling of the thermostat, the calibration
screw must be sealed. Place a few drops of enamel sealant directly on the calibration screw.
(RED NAIL POLISH OR EQUIVALENT IS ACCEPTABLE.)
TROUBLE POSSIBLE CAUSE REMEDY
Unit does not operate. Insufficient power supply. Check power source.
Defective power cord or plug. Check and replace if necessary.
No display in electronic control. Faulty power supply board. Check line voltage for 24V across
pins 7 and 8 on the power supply board and
across terminals J9 and J10 on the electronic
control.
Faulty electronic control. Replace control.
Cannot control temperature but Faulty relay Replace relay.
sensor and electronic control
checks O.K. Heating element grounded. Replace element.
Temperature readout incorrect. Dirty or faulty sensor. Check sensor at 32°F (0°C).
If Ohm reading is 100,
Faulty control. replace display.
If Ohm reading is not 100,
replace sensor.
TROUBLE SHOOTING CHECKLIST • ELECTRONIC CONTROL
R e p i r s s h o u l d b e m d e b y u t h o r i z e d s e r v i c e g e n t s o n l y.
S E R V I C E

#818 Installation/Operation/Service Manual 16.
S E R V I C E
TROUBLE SHOOTING • ELECTRONIC CONTROL
Error
Cod D scription/R sults
Possibl Caus
S rvic R quir d
E-10 Air S nsor Fault (short d)
Inoperative Oven Air sensor is shorte .
Air sensor is efective.
Air sensor is open or has connection failure.
Nee air sensor test. See below.
E-11 Air S nsor Fault (op n)
Inoperative Oven
E-30 Und r t mp ratur
Oven will not reach set temperature Oven oor close ? Door gasket nee replacement? Preheat skippe ?
Oven overloa e or has frozen pro uct? Defective air sensor or probe?
Defective soli state relay? Ba wire connections or open heating cable?
Is the high limit switch trippe ? If none of the above, call service.
E-31 Ov r t mp ratur
Oven will shut down
Shorte cable? Defective soli state relay? Defective air sensor?
If none of the above, call service.
E-60 R al tim clock rror
Inoperative Oven
Appliance has probably been unplugge for more than 30 ays. If this is the
case, it shoul be plugge in with the circuit breaker ON, an the appliance
isplaying the E-60 on the front panel for more than 30 minutes. Once this
has been accomplishe , the circuit breaker shoul be turne OFF, or the
appliance unplugge for approximately 10 secon s after which the appliance
shoul be turne ON again.
E-70 Configuration conn ctor rror
Inoperative Oven
Check control connections for loose wires. If none, control must be replace .
E-78 Voltag low
Inoperative Oven
If 125 VAC unit, voltage is below 90 VAC. Correct.
If 208-240 VAC voltage is below 190 VAC. Correct.
E-79 Voltag high
Inoperative Oven
If 125 VAC unit, voltage is over 130 VAC. Correct.
If 208-240 VAC, voltage is over 250 VAC. Correct.
E-80 EEPROM - Function data rror
Inoperative Oven
Replace control.
E-82 EEPROM - Calibration data rror
Inoperative Oven
Replace control.
E-84 EEPROM - Unit ID rror
Inoperative Oven
Replace control.
E-86 EEPROM - Pr s t data rror
Inoperative Oven
Replace control.
To test air sensor:
Test air sensor by placing sensor in ice water bath an using an ohmmeter set on the ohm scale.
The rea ing shoul be 100 ohms resistance. If it is more than 2 ohms higher or lower, sensor nee s
to be replace .
DRAWER WARMERS - ELECTRONIC CONTROL

#818 Installation/Operation/Service Manual 17.
Part Description Qty 500-1D Qty 500-2D Qty 500-3D
Manual or Electronic Control • Wide Drawer Warmers
Air Tunnel 1 1002672 1 1002672 1 1002672
Cable Replacement Kit (CB-3044) 1 4874 1 4874 1 4874
Casing Bottom 1 1002400 1 1002400 1 1002400
Casing Top 1 1002403 1 1002403 1 1002403
Casing 1 1002558 1 1002396 1 1002564
Cordset (120V) 1 CD-3232 1 CD-3232 1 CD-3232
Cordset (208/240) 1 CD-33840 1 CD-33840 1 CD-33840
Cordset (230V) 1 CD-3922 1 CD-3922 1 CD-3922
Drawer Assembly 1 55502 2 55502 3 55502
Drawer front ounting Stud 4 ST-25019 8 ST-25019 12 ST-25019
Drawer front ounting Nut 4 NU-2187 8 NU-2187 12 NU-2187
Drawer Bearing 6 BG-24890 12 BG-24890 18 BG-24890
Drawer Pan (NOT SHOWN)1PN-25088 2 PN-25088 3 PN-25088
Drawer with vents 1 55536 2 55536 3 55536
Fan, Box (120V) 1 FA-3973 1 FA-3973 1 FA-3973
Fan, Box (208/240V, 230V) 1 FA-3974 1 FA-3974 1 FA-3974
Insulation, Board 3 IN-2003 3 IN-2003 3 IN-2003
Switch (230V), circuit breaker 1 SW-33487 1 SW-33487 1 SW-33487
Switch (120V), wattage 1 SW-3409 1 SW-3409 N/A
Terminal Block 1 BK-3019 1 BK-3019 1 BK-3019
Manual Control Wide • Drawer Warmers
Heat Indicator Light (120V) 1 LI-3027 1 LI-3027 1 LI-3027
Heat Indicator Light (208/240V) 1 LI-3025 1 LI-3025 1 LI-3025
Heat Indicator Light (230V) 1 LI-3951 1 LI-3951 1 LI-3951
Knob, Thermostat (120V, 208/240V) 1 KN-3469 1 KN-3469 1 KN-3469
Knob, Thermostat (230V ONLY)1KN-3474 1 KN-3474 1 KN-3474
Panel Overlay (120V) 1 PE-25068 1 PE-25068 1 PE-25067
Panel Overlay (208/240V, 230V) 1 PE-25067 1 PE-25067 1 PE-25067
Thermostat 1 TT-3057 1 TT-3057 1 TT-3057
Temperature Gauge 1 TH-33713 1 TH-33713 1 TH-33713
Temperature Gauge Lens Cover replacement 1 TH-33956 1 TH-33956 1 TH-33956
Electronic Control • Wide Drawer Warmers
Beeper 1 BP-3567 1 BP-3567 1 BP-3567
Block, Sensor 1 BK-33546 1 BK-33546 1 BK-33546
Board, Power Supply 1 BA-33554 1 BA-33554 1 BA-33554
Control, Electronic 1 5000876 1 5000876 1 5000876
Panel Overlay 1 PE-25327 1 PE-25327 1 PE-25327
Relay 1 RL-33558 1 RL-33558 1 RL-33558
Sensor 1 SN-33541 1 SN-33541 1 SN-33541
Thermostat, Electronic, 230V ONLY 1 TT-33789 1 TT-33789 1 TT-33789
Wide Drawer Warmers –Service Parts
Illustrat ons on follow ng pages.

#818 Installation/Operation/Service Manual 18.
Part Description Qty 500-1DN Qty 500-2DN Qty 500-3DN
Manual orElectronic Control •Narrow Drawer Warmers
Air Tunnel 1 1002672 1 1002672 1 1002672
Cable Replacement Kit (CB-3044) 1 4874 1 4874 1 4874
Casing Bottom 1 1002794 1 1002794 1 1002794
Casing Top 1 1002798 1 1002798 1 1002798
Casing 1 1002884 1 1002837 1 1002799
Cordset (120V) 1 CD-3232 1 CD-3232 1 CD-3232
Cordset (208/240) 1 CD-33840 1 CD-33840 1 CD-33840
Cordset (230V) 1 CD-3922 1 CD-3922 1 CD-3922
Drawer Assembly 1 55509 2 55509 3 55509
Drawer front ounting Stud 4 ST-25019 8 ST-25019 12 ST-25019
Drawer front ounting Nut 4 NU-2187 8 NU-2187 12 NU-2187
Drawer Bearing 6 BG-24890 12 BG-24890 18 BG-24890
Drawer Pan (NOT SHOWN)1PN-25088 2 PN-25088 3 PN-25088
Drawer with vents 1 55537 2 55537 3 55537
Fan, Box (120V) 1 FA-3973 1 FA-3973 1 FA-3973
Fan, Box (208/240V, 230V) 1 FA-3974 1 FA-3974 1 FA-3974
Insulation, Board 3 IN-2003 3 IN-2003 3 IN-2003
Switch (230V), circuit breaker 1 SW-33487 1 SW-33487 1 SW-33487
Switch (120V) wattage 1 SW-3409 1 SW-3409 N/A
Terminal Block 1 BK-3019 1 BK-3019 1 BK-3019
Manual Control • Narrow Drawer Warmers
Heat Indicator Light (120V) 1 LI-3027 1 LI-3027 1 LI-3027
Heat Indicator Light (208/240V) 1 LI-3025 1 LI-3025 1 LI-3025
Heat Indicator Light (230V) 1 LI-3951 1 LI-3951 1 LI-3951
Knob, Thermostat (120V, 208/240V) 1 KN-3469 1 KN-3469 1 KN-3469
Knob, Thermostat (230V ONLY)1KN-3474 1 KN-3474 1 KN-3474
Panel Overlay (120V) 1 PE-25014 1 PE-25014 1 PE-25013
Panel Overlay (208/240V, 230V) 1 PE-25013 1 PE-25013 1 PE-25013
Thermostat 1 TT-33626 1 TT-33626 1 TT-33626
Temperature Gauge 1 TH-33713 1 TH-33713 1 TH-33713
Temperature Gauge Lens Cover replacement 1 TH-33956 1 TH-33956 1 TH-33956
Electronic Control • Narrow Drawer Warmers
Beeper 1 BP-3567 1 BP-3567 1 BP-3567
Block, Sensor 1 BK-24427 1 BK-24427 1 BK-24427
Board, Power Supply 1 BA-33554 1 BA-33554 1 BA-33554
Control, Electronic 1 5000876 1 5000876 1 5000876
Panel Overlay 1 PE-25326 1 PE-25326 1 PE-25326
Relay 1 RL-33558 1 RL-33558 1 RL-33558
Sensor 1 SN-33541 1 SN-33541 1 SN-33541
Thermostat, Electronic, 230V only 1 TT-33789 1 TT-33789 1 TT-33789
Narrow Drawer Warmers –Service Parts
Illustrat ons on follow ng pages.

#818 Installation/Operation/Service Manual 19.
S E R V I C E
500-3D • anual control • top removed
INSULATION
IN-2003
THER OSTAT
TT-3057
TT-33626
THER O ETER
TH-33713
INDICATOR LIGHT
LI-3027
LI-3025
LI-3951
TER INAL BLOCK
BK-3019
WIRING
DIAGRA
HEATING ELE ENT
CONNECTIONS AIR TUNNEL 1002672
(EXHAUST FAN INSIDE)
FA-3973
FA-3974
ELECTRIC CORD
CD-3232
CD-33840
CD-3922