Arctic Air AST28RZ Instruction manual

INSTALLATION,
OPERATION &
MAINTENANCE
MANUAL
Pizza Prep Tables
Sandwich/Salad Units
Under-counter Refrigerators
and Freezers
Worktop Refrigerators and
Freezers
IMPORTANT
Please read this manual completely
before attempting to install or operate this equipment.

Service and Installation Manual
2
COMMECIAL REFRIGERATOR SAFETY
Your safety and the safety of others are very im ortant.
We have provided many important safety messages in this manual and on your appliance. Always read and
obey all safety messages.
Our roduct instructions will be u loaded on our com any official website.
This is the Safety Alert Symbol. This symbol alerts you to potential hazards that can
kill or injure you and others. All safety messages will follow the Safety Alert Symbol
and either the words” ANGER”, “WARNING” or “CAUTION”.
anger means that failure to heed this safety
statement may result in severe personal injury or
death.
Warning means that failure to heed this safety
statement may result in extensive product
damage, serious personal injury, or death.
Caution means that failure to heed this safety
statement may result in minor or moderate
personal injury, or property or equipment damage.
All safety messages will alert you to what the potential hazard is, tell you how to reduce the chance of injury,
and let you know what can happen if the instructions are not followed.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
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 or
instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
This appliance can be used by children aged from 8 years and above and persons with reduced physical
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or
instruction concerning use of the appliance in a safe way and understand the hazards involved. Children
shall not play with the appliance. Cleaning and user maintenance shall not be made by children without
supervision.
Keep the appliance and its cord out of reach of children less than 8 years.
Do not store explosive substances such as aerosol cans with a flammable propellant in this appliance.
The appliance use flammable insulation blowing gas C5H10, disposal of the appliance shall in accordance
with the regulations of local authorities.

Service and Installation Manual
3
The key for appliance electric box should be safe kept by qualified persons in order to avoid a hazard
WARNING: Keep ventilation openings, in the appliance enclosure or in the built-in structure, clear of
obstruction.
WARNING: o not use mechanical devices or other means to accelerate the defrosting process, other than
those recommended by the manufacturer.
WARNING: o not damage the refrigerant circuit.
WARNING: o not use electrical appliances inside the food storage compartments of the appliance, unless
they are of the type recommended by the manufacturer.
Handling, moving, and use of the refrigerator or freezer to avoid either damaging the refrigerant tubing, or
increasing the risk of a leak
L’opération, le mouvement et l’utilisation du réfrigérant ou le congélateur doivent éviter les dommages du
tuyau réfrigérant ou le rique de la fuite.
Caution – Risk of Fire or Explosion due to Flammable Refrigerant Used. Follow Handling
Instructions Carefully in Compliance with U.S. Government Regulations.
Component parts shall be replaced with like components and that servicing shall be done by factory
authorized service personnel, so as to minimize the risk of possible ignition due to incorrect parts or
improper service.
Les pièces de rechange doivent être remplacées par les components relatifs et les opérations doivent être
faites par les professionnels afin de minimaliser le risque d’allumage à cause des parts incorrects ou des
opérations impropres.
CAUTION – Risk Of Fire Or Explosion ue To Puncture Of Refrigerant Tubing; Follow Handling Instructions
Carefully. Flammable Refrigerant Used
DANGER: Risk of child entrapment. Before you throw away your old refrigerator or freezer:
Take off the doors
Leave the shelves in place so that children may not easily climb inside

4
Installation, Operation & Maintenance Manual
TABLE OF CONTENTS
SPECIFICATIONS.............................................................................................................................................................................5
REGISTRATION................................................................................................................................................................................6
SAFETY INSTRUCTIONS.................................................................................................................................................................7
INTRODUCTION ...............................................................................................................................................................................8
Site Preparation..........................................................................................................................................................................8
RECEIVING AND INSPECTING ......................................................................................................................................................8
Serial Number Location..............................................................................................................................................................8
INSTALLATION .................................................................................................................................................................................9
Location .....................................................................................................................................................................................9
Inside cabinet .....................................................................................................................................................................9
Outside cabinet ...................................................................................................................................................................9
Electrical connection ..................................................................................................................................................................9
Leveling .....................................................................................................................................................................................9
Stabilizing............................................................................................................................................................................9
OPERATION ...................................................................................................................................................................................10
Refrigerated Cabinets ..............................................................................................................................................................10
Defrosting .................................................................................................................................................................................10
Front Panel Controls and Indicators.........................................................................................................................................10
Functions..................................................................................................................................................................................11
Display the set point:.........................................................................................................................................................11
Change the set point:........................................................................................................................................................11
Manual Defrost..................................................................................................................................................................11
Keyboard Lock ..................................................................................................................................................................11
Keyboard Unlock...............................................................................................................................................................11
Alarm Codes.............................................................................................................................................................................11
Display and Reset Alarm..........................................................................................................................................................11
MAINTENANCE ..............................................................................................................................................................................1 2
Refrigerators and Freezers ......................................................................................................................................................12
Cleaning the Condenser Coil ...................................................................................................................................................12
Stainless Steel Care and Cleaning ..........................................................................................................................................12
Gasket Maintenance ................................................................................................................................................................ 13
Doors/Hinges............................................................................................................................................................................ 1 3
Drain Maintenance ................................................................................................................................................................... 1 3
Door Replacement and Adjustment.......................................................................................................................................... 13
Open the Bottom Shroud..........................................................................................................................................................13
WIRING DIAGRAMS .......................................................................................................................................................................1 4
Models:
Models:
Models:
APP48RZ,APP71RZ,....................................
APP94RZ,AST28RZ,AMT28RZ
...............................................................................................................
AUC27RZ .................................................................................................................................................................. .25
Models: AUC48RZ , AUC60RZ ............................................................................................................................................... 26
Models: AUC27FZ................................................................................................................................................................... 27
Models: AUC48FZ , AUC60FZ................................................................................................................................................ 28
..................................................................................................................................
14
Models: AUC27RZ, AUC48RZ,AUC60RZ
...............................................................................................................................17
Models: AUC27FZ , AUC48FZ,AUC60FZ .............................................................................................................................
15
Models:
Models:
APP48RZ
APP71RZ
................................................................................................................................................................
..................................................................................................................................................................
19
20
Models:
Models:
AST28RZ,AMT28RZ
AST48RZ,AST60RZ,AMT48RZ,AMT60RZ
..............................................................................................................................................
...............................................................................................................
22
23
18
ARCTIC AIR WARRANTY................................................................................................................................................................29
Models: AST48RZ,AST60RZ,AMT48RZ,AMT60RZAST72RZ,AMT72RZ
................................................................................16
Models: AST72RZ,AMT72RZ ............................................................................................................................................... 24
Models: APP94RZ .................................................................................................................................................................. 21

5
UNDER-COUNTER REFRIGERATORS AND FREEZERS
SPECIFICATIONS
PIZZA PREP TABLES
MODEL # V/Hz/Ph AMPS STORAGE
CAPACITY
Cu-ft
PAN
1/3
Size
SHELF
CAPACITY
Sq-ft
HP BTU CHARGE
Oz
SHIP
WEIGHT
Lbs
NEMA
PLUG
APP48RZ 115/60/1 5 12 6 16 1/2 1365 3.70 348 5-15P
APP71RZ 115/60/1 5 22 9 34 1/2 1365 3.70 432 5-15P
SANDWICH/SALAD UNITS
MODEL # V/Hz/Ph AMPS STORAGE
CAPACITY
Cu-ft
PAN
1/6
Size
SHELF
CAPACITY
Sq-ft
HP BTU CHARGE
Oz
SHIP
WEIGHT
Lbs
NEMA
PLUG
AST28RZ 115/60/1 3 7 8 14 3/8 853 3 276 5-15P
AST48RZ 115/60/1 4.3 12 12 26 1/2 1365 3.17 313 5-15P
UNDERCOUNTER & WORKTOP REFRIGERATORS
MODEL # V/Hz/Ph AMPS STORAGE
CAPACITY
Cu-ft
SHELF
CAPACITY
Sq-ft
HP BTU CHARGE
Oz
SHIP
WEIGHT
Lbs
NEMA
PLUG
AUC27RZ 115/60/1 1.5 6.5 14 3/8 2800 2.47 243 5-15P
AUC48RZ 115/60/1 3 12 26 3/8 3000 2.65 300 5-15P
UNDERCOUNTER FREEZERS
MODEL # V/Hz/Ph AMPS STORAGE
CAPACITY
Cu-ft
SHELF
CAPACITY
Sq-ft
HP BTU CHARGE
Oz
SHIP
WEIGHT
Lbs
NEMA
PLUG
AUC27FZ 115/60/1 1.9 6.5 14 1/2 3500 3.35 291 5-15P
AUC48FZ 115/60/1 4 12 26 1/2 3800 3.53 340 5-15P
AST60RZ 115/60/1 4.3 15.5 16 30 1/2 1365 3.17 362 5-15P
AST72RZ 115/60/1 4.3 18 18 36 1/2 1365 3.35 408 5-15P
MEGATOP SANDWICH/SALAD UNITS
MODEL # V/Hz/Ph AMPS STORAGE
CAPACITY
Cu-ft
PAN
1/6
Size
SHELF
CAPACITY
Sq-ft
HP BTU CHARGE
Oz
SHIP
WEIGHT
Lbs
NEMA
PLUG
AMT28RZ 115/60/1 3 7 12 14 3/8 3 276 5-15P
AMT48RZ 115/60/1 4.3 12 18 26 1/2 3.17 313 5-15P
AMT60RZ 115/60/1 4.3 15.5 24 30 1/2 3.17 362 5-15P
AMT72RZ 115/60/1 4.3 18 27 36 1/2 3.35 408 5-15P
APP94RZ 115/60/1 5 32 12 54 3/4 1877 3.70 582 5-15P
853
1365
1365
1365
AUC60RZ 115/60/1 3 15.5 30 3/8 3000 2.82 380 5-15P
AUC60FZ 115/60/1 5 15.5 30 5/8 3800 3.53 388 5-15P

6
Installation, Operation & Maintenance Manual
UNDER-COUNTER REFRIGERATORS AND FREEZERS
REGISTRATION
The installation date and appliance model must be documented by the end purchaser.
Also, refer to the Warranty section for additional details on registering the appliance.
Dealer Information:
Installer Information:
Installation Date:

Installation, Operation & Maintenance Manual
7
UNDER-COUNTER REFRIGERATORS AND FREEZERS
SAFETY INSTRUCTIONS
General Safety
WARNING Arctic Air accepts no responsibility for any situation resulting from work carried out in an
unprofessional manner, or from the incorrect interpretation or application of regulations.
General Installation
WARNING  Incorrectinstallationoranymodicationsmadetotheappliancemaydamagepropertyor
result in injury or death.
Electrical
WARNING Electrical connections or any work required on the electrical circuits inside the appliance
mustbeperformedbycertiedtechniciansincompliancewithlocal,state,andfederal
regulations.
WARNING Make sure all facility electrical connections are in compliance with all local and federal
electrical code regulations.
Inspection and Maintenance
WARNING Appliance maintenance must be carried out by only by suitably trained personnel.
WARNING Before any maintenance work is performed, the appliance must be disconnected from the
electrical supply. Apply a lockout tag to the electrical supply connection.
WARNING All replacement parts that are not supplied by Arctic Air must be pre-approved before
installation.
Repair Work Safety
WARNING Repair work must only be performed by Arctic Air or one of its authorized representatives.
Arctic Air accepts no responsibility for any situation resulting from work performed by
untrained and/or unauthorized technicians.

8
Installation, Operation & Maintenance Manual
UNDER-COUNTER REFRIGERATORS AND FREEZERS
INTRODUCTION
This manual covers the Under-counter Refrigerators and
Freezers. Please read this manual completely before at-
tempting to install or operate this equipment.
Site Preparation
The installation site must be cleaned and prepared prior
to the equipment delivery.
• Refer to the SPECIFICATIONS and have a licensed
electrician conrm that all electrical requirements
are satised.
• Conrm that all ooring is structurally strong enough
to support the weight of a fully loaded unit; a fully
loaded unit can weigh as much as 1500 pounds.
Consult with a structural engineer for conrmation if
there is any reason to doubt the oor strength.
• Conrm that adequate ventilation has been provid-
ed, and that the unit will not be located close to a
heat source.
• For all units on casters, conrm that the oor is level
where the unit is to be located.
RECEIVING AND INSPECTING
Exercise care to prevent damaging the equipment dur-
ing unloading and on-site transporting.
1. Visually inspect the exterior of the package, skid
and/or container. Report any damage to the carrier
immediately.
2. If any packaging damage is noted, open and inspect
the contents with the carrier.
3. If concealed damage is discovered after unpacking
the equipment notify the carrier. Notication must
be made both in writing and verbally.
4. Check the compressor compartment housing and
visually inspect the refrigeration package. Conrm
that the lines are secure and the base is intact.
5. Request the required damage forms and an equip-
ment damage inspection by the shipping company.
The inspection should be performed within 10 days
from receipt of the equipment.
6. Retain all crating material until an inspection has
been performed or waived.
Serial Number Location
The serial number of all self-contained refrigerators and
freezers is located inside the unit on the left hand side
near the top on the wall. Have the serial number avail-
able when calling for parts or service.
This manual covers only standard units. For a custom
unit, consult the customer service department. See the
customer service phone number listed on the last page.

Installation, Operation & Maintenance Manual
9
UNDER-COUNTER REFRIGERATORS AND FREEZERS
INSTALLATION
Location
All units are intended for indoor use only. A fully loaded
unit can weigh as much as 1500 pounds. Choose a loca-
tion with a level oor strong enough to support the total
weight of a fully loaded unit. Reinforce the oor if neces-
sary.
For the most efcient refrigeration, provide good air cir-
culation around the unit.
Inside cabinet
Do not pack the unit interiors so that air circulation is im-
peded. The refrigerated air is discharged at the top rear
of the unit. Allow for proper air ow from the top rear to
the bottom of the unit. Obstructions to this air ow can
cause evaporator coil freeze ups and loss of temperature
or overow of water from the evaporator drain pan. The
shelves have a rear turn up on them to prevent obstruc-
tions to the rear air ow. However, bags and other items
located at the rear of the cabinet may obstruct the air
ow.
Outside cabinet
Be sure that the unit has access to ample air ow. Avoid
hot corners and locations near stoves and ovens. Do not
install the unit closer than two inches from a wall. To pre-
vent air obstruction, do not locate large boxes and/or tall
stacks of product that might obstruct the air exhaust or
the air inlet.
CAUTION
If the unit is laid on its side or back for any reason,
allow a minimum of 24 hours in the upright position,
beforestart-uptoallowcompressoroiltoowback
to the sump. Failure to meet this requirement can
cause compressor failure, unit damage, and will
void the unit warranties.
Electrical connection
Refer to the amperage data provided in the SPECIFI-
CATIONS, the serial tag, the local electrical code and/or
the National Electrical Code. Have a licensed electrician
conrm that the facility wiring is adequate for the unit and
that a protected circuit of the correct voltage and amper-
age is provided for each unit. Conrm that the unit is
connected only to the proper protected power source.
DANGER
TURN THE ON/OFF SWITCH TO OFF AND
DISCONNECT THE UNIT FROM THE POWER
SOURCE WHENEVER PERFORMING SERVICE,
MAINTENANCE FUNCTIONS OR CLEANING
THE UNIT.
Leveling
Level the cabinet to improve performance, to better align
the doors, to reduce uneven strain on the cabinet and
reduce movement of the contents on the shelves. Use a
level to level the unit from front to back and side to side.
Units supplied with legs have adjustable bullet feet to
make the leveling adjustments. If the unit is supplied with
casters, no leveling adjustments are available. Ensure
the oor is level, where the casters unit is located.
Stabilizing
Casters are provided for convenience, ease of cleaning
underneath and for mobility. Install the unit on a level sur-
face, in a stable condition and lock the front wheels to
prevent movement.

10
Installation, Operation & Maintenance Manual
UNDER-COUNTER REFRIGERATORS AND FREEZERS
OPERATION
Refrigerated Cabinets
The internal temperature range for all food prep units,
under-counter and worktop refrigerators is 34°F to 38°F.
The internal temperature range for under-counter and
worktop freezers is -3°F to -7°F. The rail temperature
range for all prep units is 33°F to 41°F. Operate the
food prep units only with the pans in place. Operating
food prep units without pans and/or pan covers in place
lowers the efciency and may damage the unit due to
continuous running. Opening and closing the door must
be minimized to allow the unit to maintain optimum re-
frigeration temperature. Top section is not intended for
overnight storage. Product must be removed from pans.
Empty pans can remain in cabinet.
Defrosting
Every 6 hours, the unit turns off and the controller dis-
plays the defrost symbol. This allows the evaporator
coil to clear the ice. When the coil temperature reaches
the terminal temperature (or after 20 minutes) the unit
re-starts.
Front Panel Controls and Indicators
The front panel controls and indicators are used to set
and display the unit functions and status.
Callout
No.
Control /
Indicator Function
1 Fan Indicates the fans are running.
2 Defrost Press to start the manual defrost
cycle.
3 Compressor Indicates the compressor is
running.
4Up Arrow
To display the last temperature
alarm.
In programming mode it
browses the parameter codes or
increases the displayed value.
5 Down Arrow
To display the last temperature
alarm.
In programming mode it
browses the parameter codes or
decreases the displayed value.
6 SET
Used to display a target set
point; in programming mode it
elects a parameter or conrm an
operation.
7 Display
Indicates the room temperature,
the set points and the alarm
codes.
8 Alarm Indicates a temperature alarm.
Key combinations are used to perform functions that
cannot be performed with a single key.
Key Combinations
Press Keys Result
Up Arrow Down Arrow Locks and unlocks the
keyboard.
SET Down Arrow Enters the programming
mode.
SET Up Arrow Returns to the room
temperature display.
The LED functions display operational conditions.
Callout No. Mode LED Function
1a
On Fans enabled
Flashing Fans delay after defrost
in progress
2a
On Defrost enabled
Flashing
-Programming phase
(ashing with “icon”)
- Drip time in progress
3a
On Compressor enabled
Flashing
-Programming phase
(ashing with “icon”)
-Anti-short cycle delay
enabled
8a On A temperature alarm
happened
1
1a
8a
3a2a
2
8
7
4 5
6
3

Installation, Operation & Maintenance Manual
11
UNDER-COUNTER REFRIGERATORS AND FREEZERS
Functions
Display the set point:
1. Press and release the SET button, the set point
value is displayed.
2. Press and release the SET button (again) or wait
ve seconds to return to the probe value display.
Change the set point:
1. To change the set point value, press the SET button
and hold for a minimum of two seconds.
The set point value is displayed and the Compressor
LED starts blinking.
2. For the next ten seconds, the set value can be
changed using the Up Arrow or the Down Arrow but-
tons.
3. To save the new set point value press the SET key
again (or wait ten seconds).
Manual Defrost
Press the Defrost button and hold for a minimum of two
seconds. The manual defrost cycle starts.
Keyboard Lock
1. Press the Up Arrow and Down Arrow buttons and
hold for a minimum of three seconds.
2. The “POF” message is displayed when the key-
board is locked. With the keyboard locked only the
set point or the max/min temperature is displayed.
3. If any key is pressed for more than three seconds
the “POF” message is displayed.
Keyboard Unlock
Press the Up Arrow and Down Arrow buttons and hold
for a minimum of three seconds. The “Pon” message is
displayed when the keyboard is unlocked.
Alarm Codes
CODE CAUSE OUTPUTS
P1 Room probe
failure
Compressor output according
to par Con and COF
P2 Evaporator
probe failure Defrost end is timed
P3 Condenser
probe failure Outputs unchanged
HA
Maximum
temperature
alarm
Outputs unchanged
LA
Minimum
temperature
alarm
Outputs unchanged
dA Door open Compressor and fans restart
EA External alarm Outputs unchanged
CA Serious external
alarm (i1F=bal) All outputs off
CSd Condenser
alarm All outputs off
Display and reset alarm
1. Press the Up Arrow and Down Arrow buttons to
display the alarm code.
2. Press and hold the SET button until the reset (rst)
message is displayed then release.
Press the SET button again, the reset (rst) message
blinks and the room temperature is displayed.

12
Installation, Operation & Maintenance Manual
UNDER-COUNTER REFRIGERATORS AND FREEZERS
MAINTENANCE
DANGER
TURN OFF THE POWER SWITCH AND
DISCONNECT THE UNIT FROM THE POWER
SOURCE WHENEVER PERFORMING SERVICE/
MAINTENANCE FUNCTIONS AND/OR
CLEANING THE REFRIGERATED AREA.
Refrigerators and Freezers
Clean the interior and exterior using soap and warm wa-
ter. If this is not sufcient, use ammonia and water or a
nonabrasive liquid cleaner. When cleaning the exterior,
always rub with the stainless steel grain to avoid marring
the nish.
Do not use an abrasive cleaner, it may scratch the stain-
less steel and/or the plastic. Abrasive cleaners can also
damage the breaker strips and gaskets.
Cleaning the Condenser Coil
Clean the condenser coil a minimum of every 90 days.
If there is a large amount of debris, dust or grease ac-
cumulation prior to the 90 day cycle, reduce the cleaning
cycle to every 30 days.
If the buildup on the coil consists of only light dust and
debris, clean the condenser coil using a brush. For
heavier dust buildup, use a vacuum or compressed air.
If heavy grease is present use a refrigeration degreas-
ing agent designed specically for the condenser coils.
Spray the condenser coil with degreasing agent and
blow through with compressed air.
Failure to maintain a clean condenser coil can initially
cause high temperatures and excessive run times. Con-
tinuous operation with dirty or clogged condenser coils
may result in compressor failures. Neglecting the con-
denser coil cleaning procedures will void any warranties
associated with the compressor.
CAUTION
Never use a high pressure water wash for this
cleaning procedure as water can damage the
electrical components located near or on the
condenser coil.
Stainless Steel Care and Cleaning
Stainless steel contains 70-80% iron which will rust. It
also contains 12-30% chromium which forms an invis-
ible passive lm over the steel’s surface that acts as a
corrosion shield. As long as the protective layer remains
intact, the metal remains stainless. If the lm is broken
or contaminated, outside elements can break down the
steel and begin to form rust or discoloration.
To properly clean stainless steel, use soft cloths or plas-
tic scouring pads.
CAUTION
Never use steel pads, wire brushes or scrapers to
clean stainless steel surfaces.
Cleaning solutions must be alkaline based or non-chlo-
ride cleaners. Any cleaner containing chlorides will dam-
age the stainless steel protective lm. Chlorides are also
commonly found in hard water, salts, and household and
industrial cleaners. If cleaners containing chlorides are
used, be sure to rinse repeatedly and dry thoroughly
upon completion.
Perform routine stainless steel cleaning with soap and
water. Extreme stains or grease should be cleaned with
a non-abrasive cleaner and plastic scrub pad (rub with
the grain). There are also stainless steel cleaners avail-
able which can restore the protective layer and preserve
the nish.
Early signs of stainless steel breakdown may consist of
small pits and cracks. If these early signs are present,
clean thoroughly and apply a cleaner specically de-
signed for stainless steel cleaners to attempt to restore
the passivity.
CAUTION
Never use an acid based cleaning solution. In
addition, many food products have an acidic
contentwhichcandeterioratethenish.Besure
to clean the stainless steel surfaces of all food
products. Common acidic based food items
include; tomatoes, peppers and other vegetables.

Installation, Operation & Maintenance Manual
13
UNDER-COUNTER REFRIGERATORS AND FREEZERS
Gasket Maintenance
Gaskets require regular cleaning to prevent mold and
mildew buildup and to maintain the gasket elasticity.
Clean gaskets with warm soapy water. Avoid full strength
cleaning products on gaskets, this can cause the gaskets
to become brittle and prevent proper sealing. Never use
sharp tools or knives, which could tear the gasket and/or
rip the bellows, to scrape or clean the gasket.
Gaskets are easy to replace and do not require the use
of tools. To remove and replace the Dart style gasket, pull
the gasket out of the groove in the door and press the
new gasket back into place.
Doors/Hinges
Over time the door hinges may become loose. If the
doors are loose or sagging, this can cause the hinge to
pull out of the frame which may damage both the doors
and the door hinges. Tighten the screws that mount the
hinge brackets to the frame of the unit. If this does not
solve the issue call a qualied service agent.
Drain Maintenance
The drain located inside all of the units removes the
condensation from the evaporator coil and evaporates
it at an external condensate evaporator pan. Moving or
bumping the drain may cause the drain to become loose
or disconnected. If excessive water accumulates on the
inside of the unit make sure the drain tube is connected
from the evaporator housing to the condensate evapora-
tor drain pan. If water has collected underneath the unit,
check the condensate evaporator drain tube to be sure it
is still located inside the drain pan. Leveling the unit is im-
portant because the units are designed to drain properly
when level. If the oor is not level drain problems may oc-
cur. Be sure all drain lines are free of obstructions. Food
products blocking drain lines is a common cause of water
back up and overow.
Door Replacement and Adjustment
1. Open the door until it remains open, about 100° to
110°.
2. Loosen and remove the bottom screw on the self-
closing cartridge. Remove the three hinge screws,
then slide the door down and out.
3. To prepare a new door, rotate the square head of the
cartridge shaft approximately 120° in the direction
the door closes. This action preloads the hinge and
it is now ready to be secured to the bottom hinge.
4. From the closed position, hold the door at about
100°, insert the bottom hinge over the square shaft
of the cartridge so that the hinge is facing the cabi-
net. Once positioned, insert and fasten the mounting
screw.
5. Maintain the door/hinge assembly at about 100°
and slide it up to the top hinge pin. Conrm proper
alignment, and then fasten the bottom hinge.
6. The door must swing closed by itself with no restric-
tion. Conrm that the door swings freely.
Open the Bottom Shroud
Loosen and remove the screw from the two holes in front of
the bottom shroud, the bottom shroud can be moved out.

14
Installation, Operation & Maintenance Manual
WIRING DIAGRAMS
Models:APP48RZ
Models: APP71RZ
PLUG
THERMOSTAT DISPLAY
CONDENSER
FAN MOTOR
OVERLOAD
PROTECTOR
COMPRESSOR
PTC STARTER
CIRCUITALION
FAN MOTOR
t ℃
L
N
ROOM EVAP
SENSOR
DOOR FRAME HEATER
MM
L
N
THERMOSTAT DISPLAY
PLUG
CIRCUITALION
FAN MOTOR
OVERLOAD
PROTECTOR
COMPRESSOR
ROOM EVAP
SENSOR
DOOR FRAME HEATER
MIDDLE FRAME HEATER
CONDENSER
FAN MOTOR
STARTING
CAPACITOR
CURRENT
RELAY

15
UNDER-COUNTER REFRIGERATORS AND FREEZERS
Models:
Models: AST28RZ/AMT28RZ
APP94RZ
PLUG
CIRCUITALION
FAN MOTOR
ROOM EVAP
SENSOR
THERMOSTAT DISPLAY
DOOR FRAME HEATER
CONDENSER
FAN MOTOR
OVERLOAD
PROTECTOR
COMPRESSOR
t ℃
PTC STARTER
L
N
M
M
L
N
PLUG
CIRCUITALION
FAN MOTOR
ROOM EVAP
SENSOR
DOOR FRAME HEATER
MIDDLE FRAME HEATER
MIDDLE FRAME HEATER
CONDENSER
FAN MOTOR
STARTING
CAPACITOR
OVERLOAD
PROTECTOR
COMPRESSOR
CURRENT
RELAY
THERMOSTAT DISPLAY

16
Installation, Operation & Maintenance Manual
WIRING DIAGRAMS
Models: AST48RZ/AST60RZ / AMT48RZ / AMT60RZ
Models:AST72RZ / AMT72RZ
PLUG
CIRCUITALION
FAN MOTOR
THERMOSTAT DISPLAY
ROOM EVAP
SENSOR
DOOR FRAME HEATER
MIDDLE FRAME HEATER
MIDDLE FRAME HEATER
CONDENSER
FAN MOTOR
OVERLOAD
PROTECTOR
COMPRESSOR
PTC STARTER
t ℃
L
N
PLUG
CIRCUITALION
FAN MOTOR
L
N
ROOM EVAP
SENSOR
THERMOSTAT DISPLAY
DOOR FRAME HEATER
MIDDLE FRAME HEATER
t ℃
CONDENSER
FAN MOTOR
OVERLOAD
PROTECTOR
COMPRESSOR
PTC STARTER

17
UNDER-COUNTER REFRIGERATORS AND FREEZERS
Models:
Models:
AUC27RZ
AUC48RZ/AUC60RZ
PLUG
THERMOSTAT DISPLAY
ROOM EVAP
SENSOR
CONDENSEN
FAN
OVERLOAD
PROTECTOR
COMPRESSOR
FAN
POWER
EVAP
FAN
DOOR
SWITCH
PTC
STARTER
PLUG
THERMOSTAT DISPLAY
ROOM EVAP
SENSOR
CONDENSEN
FAN
OVERLOAD
PROTECTOR
COMPRESSOR
FAN
POWER
EVAP
FAN
DOOR
SWITCH
PTC
STARTER

18
Installation, Operation & Maintenance Manual
Models: AUC27FZ
Models: AUC48FZ/AUC60FZ
PLUG
THERMOSTAT DISPLAY
ROOM EVAP
SENSOR
CONDENSEN
FAN
THERMAL
CUT-OFF
DEFROST HEATER
OVERLOAD
PROTECTOR
COMPRESSOR
CURRENT
RELAY
STARTING
CAPACITOR
MIDDLE FRAME HEATER
FAN
POWER
EVAP
FAN
DOOR
SWITCH
N
L
PLUG
THERMOSTAT DISPLAY
ROOM EVAP
SENSOR
CONDENSEN
FAN
THERMAL
CUT-OFF
DEFROST HEATER
OVERLOAD
PROTECTOR
COMPRESSOR
CURRENT
RELAY
STARTING
CAPACITOR
FAN
POWER
EVAP
FAN
DOOR
SWITCH
N
L

19
Installation, Operation & Maintenance Manual
Models: APP-48RZ

20
Installation, Operation & Maintenance Manual
Models: APP71RZ