Impulse DO3616R Installation instructions

Rev K Date: 10.15.2019
READ AND SAVE THESE INSTRUCTIONS
Model DO2412R.4909 24”L x 28 5/8”D x 12 1/4”H (Upper Display Case Only)
Model DO3616R 38 1/8”L x 28 5/8”D x 16 7/8”H (Upper Display Case Only)
38 1/8”L x 28 5/8”D x 40 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DO4816R 50 1/8”L x 28 5/8”D x 16 7/8”H (Upper Display Case Only)
50 1/8”L x 28 5/8”D x 40 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Note 1. Internal counter height must be at least 28” for refrigeration and proper air flow space.
Note 2. Model DO3637R & 3623R: Service Top Cutout dimensions must be 27.15” Wide x 36.65” Long (with a
minimum 1.42” perimeter) for proper clearance and fit of Drop-In Refrigerated Merchandiser. These combined
dimensions require a 30” minimum counter top space for cutout.
Note 3. Model DO4837R & DO23R: Service Top Cutout dimensions must be 27.15” Wide x 48.65” Long (with a
minimum 1.42” perimeter) for proper clearance and fit of Drop-In Refrigerated
Merchandiser. These combined dimensions require a 30” minimum counter top space for cutout.
I:\Oper Manuals\Impulse_DO2412R-4909_DO3616R_DO4816R Manual_54167.pub
P/N 54167
INSTALLATION &
OPERATING MANUAL
888 E. Porter Road ∙ Muskegon, MI 49441 Phone: [phone] Fax: [phone] www.structuralconcepts.com
DO3616R
DO4816R
DO3616R
DO4816R
DO4816R
DO3616R
DO2412R.4909
SERVICE DROP-IN REFRIGERATED SELF-SERVICE MERCHANDISER

2
TABLE OF CONTENTS
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS ….…….....
CUSTOMER CABINET PROVISIONS…………………..…………………..…….………….....…………...
CLEARANCE FROM OPENINGS / SERVICE TOP CUTOUT DIMENSIONS / CLEARANCE DIM’S ...
VENTING INSTRUCTIONS FOR AIR INTAKE / EXHAUST ……………….…………………..…………..
INSTALLATION: CASE REMOVAL / CASE SETUP / SEALING UPPER DISPLAY CASE TO BASE ..
CASE START-UP / TEMPERATURE SETTINGS / THERMOMETERS ………………..…………….….
MAINTENANCE FUNDAMENTALS ..…………………………………………………………………..…….
REFRIGERATION: ACCESS / ASSEMBLY / DISASSEMBLY / SERVICE / TEMP. CONTROL ....…...
REFRIGERATION, CONTINUED: REFRIGERATION SLIDE-OUT EXPLODED PICTORIAL ….……..
SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE …………....……...
TROUBLESHOOTING ..………………….………………………………………………..……….………….
CLEANING SCHEDULE ....………………………………………………………...…...………………….….
CAREL® TEMPERATURE CONTROLLER INFORMATION ………………..…………………………….
TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION ………….……...
3-4
5
6
7
8
9
10-11
12
13
14
15-16
17
18-20
21

3
OVERVIEW
 These Structural Concepts merchandisers are
designed to merchandise packaged products at 41 °F
[5 °C] or less product temperatures.
 Cases should be installed and operated according to
this operating manual’s instructions to ensure proper
performance.
 Improper use will void warranty.
TYPE 1 vs. TYPE 2 CONDITIONS
This unit is designed for the display of products in ambient
store conditions where temperatures and humidity are
maintained within a specific range.
 For Type 1 Conditions (most cases): ambient
conditions are to be at 55% maximum humidity and
maximum temperatures of 75 °F [24 °C].
 For Type 2 Conditions: ambient conditions are to be at
55% maximum humidity and maximum temperatures of
80 °F [27 °C].
 If unsure if unit is designed for Type 1 or 2, see tag
next to serial label. See SERIAL LABEL LOCATION &
INFORMATION LISTED / TECH INFO & SERVICE
section in this manual for sample serial labels.
COMPLIANCE
 Performance issues when in violation of applicable
NEC, federal, state and local electrical and plumbing
codes are not covered by warranty.
 See below compliance guideline.
WARNINGS
 This page contains important warnings to prevent injury
or death. Please read carefully!
WARNING
Hazardous moving parts. Do not operate unit with covers removed.
Fan blades may be exposed when deck panel is removed.
Disconnect power before removing deck panel.
WARNING
Risk of electric shock. Disconnect power before servicing unit.
CAUTION! More than one source of electrical supply is
employed with units that have separate circuits.
Disconnect ALL ELECTRICAL SOURCES before servicing.
WARNING
Condensate Pan is Hot!
Disconnect and allow to cool
before cleaning or removing from case.
WARNING
ELECTRICAL
HAZARD
WARNING
KEEP
HANDS
CLEAR
WARNING
HOT
SURFACE
COMPLIANCE
This equipment MUST be installed in compliance with
all applicable NEC, federal, state and local
electrical and plumbing codes.
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS - PAGE 1 of 2
WARNING: This product can expose you to chemicals, including
Urethane (Ethyl Carbamate), which are known to the state of
California to cause cancer and birth defects or other reproductive
harm. For more information go to P65Warnings.ca.gov.

4
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS - PAGE 2 of 2
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
 Performance issues caused by adverse conditions are NOT warranty.
 Unit must be kept at least 15-feet from exterior doors, overhead HVAC
vents or any air curtain disruption to maintain proper temperatures.
 So not exposed to direct sunlight or heat sources (ovens, fryers, etc.).
 Keep at least 8-inch clearance above unit for air discharge
(self-contained units only).
CAUTION
PRECAUTIONS
 Following are important precautions to prevent
damage to unit or merchandise. Please read carefully!
REFRIGERANT DISCLOSURE STATEMENT
 This equipment is prohibited from use in California
with any refrigerants on the “List of Prohibited
Substances” for that specific end-use, in accordance
with California Code of Regulations, title 17, section
95374.
 This disclosure statement has been reviewed and
approved by Structural Concepts and Structural
Concepts attests, under penalty of perjury, that these
statements are true and accurate.
WIRING DIAGRAM FORMAT & LOCATION
 Each case has its own wiring diagram folded and in its own packet.
 Wiring diagram placement may vary; it may be placed near ballast
box, field wiring box, raceway cover, or other related location.
CAUTION! GFCI BREAKER USE RECOMMENDATION
If N.E.C. (National Electric Code) or your local code
requires GFCI (Ground Fault Circuit Interrupter) protection,
the use of a GFCI breaker is strongly recommended.
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design.
Any replacements must meet factory specifications.
Fluorescent lamps have been treated to resist breakage and
must be replaced with similarly treated lamps.
CAUTION
CAUTION! POWER CORD AND PLUG MAINTENANCE
Risk of electric shock. If cord or plug becomes damaged,
replace only with cord and plug of same type.
CAUTION! CHECK CONDENSATE PAN POSITION & PLUG
Water on flooring can cause extensive damage!
Before powering up unit, check and confirm that:
 Condensate pan is DIRECTLY UNDER condensate drain.
 Condensate pan plug is securely plugged into receptacle.

CUSTOMER CABINET PROVISIONS
Customer Cabinet Provisions
 Customer provided cabinet must adhere to the minimum requirements in ANSI/UL Std. 471 and ANSI/
NSF Std. 7.
 Among the factors that are to be taken into consideration when judging the acceptability of a cabinet or
similar enclosure are mechanical strength, resistance to impact, moisture-absorptive properties, flame
resistance, resistance to distortion at temperatures to which the material may be subjected under
conditions of use, and resistance to corrosion.
 Customer provided cabinet or similar enclosure shall have the strength and rigidity necessary to resist
conditions of intended use without increasing the risk of fire or injury to persons due to total or partial
collapse. Cabinet or similar enclosure must be strong enough to hold weight of cabinet and intended
product load. Dry weight (no product in case) exceeds 500 pounds.
 A nonmetallic cabinet or similar enclosure (or part of an enclosure) shall have a flame spread index of not
more than 200 when tested in accordance with the Standard for Tests for Surface Burning
Characteristics of Building Materials, UL 723.
 The cabinet or similar enclosure shall be constructed and assembled to reduce the risk of fire due to the
emission of molten metal, burning insulation, flaming particles, or the like, through openings onto
flammable material, including the surface over which the refrigeration is mounted.
 A sheet metal cabinet or similar enclosure is to be judged for acceptability with respect to its
size, shape, metal thickness. Sheet metal such as galvanized or stainless shall be 0.30 inch
(22 gage) or greater.
 Steel enclosures shall be protected against corrosion by metallic or nonmetallic coatings, such
as plating or painting.
 The refrigeration access panel/door shall be arranged so that main power switch, refrigeration controller
and refrigeration package are accessible without removing parts other than access panel/door.
 A hinged or pivoted panel shall be positioned or arranged so that when it is in an open position
falling or swinging due to gravity or vibration will not cause injury to persons.
 For electrical protection when installed in its intended manner, louvers and other openings in the
enclosure shall be constructed and located to reduce the risk of unintentional contact with moving, live or
hot parts such as fan blades and condensate trays. The minor dimension of such openings shall not
exceed 3 inches—See Table 6.1 for clearance from openings. Tools are required to remove covers,
panels or grilles unless interlock is provided.
 Ventilation openings/louvers shall be free of sharp edges and burrs and have spaces large enough to
allow for easy cleaning. Louvers that may be subject to splashes, spills, and overhead drips shall be of a
drip-deflecting design.
5

CLEARANCE FROM OPENINGS / SERVICE TOP CUTOUT DIMENSIONS / CLEARANCE DIMENSIONS
6
2. Service Top Cutout Dimensions
Note: See Manual Cover for Service Top Cutout
Dimensions.
3. Clearance Dimensions
The Refrigerated section must maintain airflow
clearance. Dimensions are as follow.
1. 4" Minimum Spacing from bottom of refrigeration
frame to bottom of cabinet or floor required for adequate
air flow.
2. 9 1/2" Countertop / Fascia enclosure space on cabinets
or counter to allow for pullout system slide-out.
3. 15" Minimum opening in back of cabinet or counter
(to pull out refrigeration system).
4. Back of counter / cabinet ventilation must be at spe-
cific space to allow for proper air intake and exhaust. See
illustration at right.
5. Front of counter ventilation must be at least 2” to allow
proper air intake and exhaust. See illustration at right.
6. Obstruction or restriction of air can void warranty.
Note: See Venting Instructions sections (next page)
for more specific Air Intake and Air Exhaust
clearance dimensions.
1. Clearance From Openings [Standard]
9 1/2” (SEE
NOTE 2)
15”
(SEE NOTES
3 & 4)
4” (SEE NOTE 1)
ABOVE ILLUSTRATION APPLIES
TO BOTH MODELS
2” MIN. (SEE NOTE 5)

VENTING INSTRUCTIONS FOR AIR INTAKE / EXHAUST - DO3616R & DO4816R
7
WARNING!: The MINIMUM intake and exhaust areas must be allowed (as illustrated
below) or case temperatures may fluctuate beyond safe parameters!
4” Minimum
Air Exhaust
Space
4” Minimum Air
Exhaust Space
4” Minimum Air Exhaust Space
Cabinetry MUST provide access space
to allow rear slide-out of refrigeration
package. Measure before building!
2” Maximum Vertical Space Between Louvers
Louvers (or screening) must extend at least
4” beyond each end of refrigeration unit.
ILLUSTRATION BELOW REFLECTS REAR VIEW OF CABINET AFTER
POSITIONED ON CUSTOMER-SUPPLIED COUNTER/BASE
NOTES:
1. THE IDEAL CONDITION FOR REAR OF CABINET IS TO HAVE COMPLETE OPEN SPACE (WITH NO DOORS
OR BLOCKING OF AIRFLOW WHATSOEVER).
2. SHOULD CABINET DOORS BE DESIRED (AS SHOWN BELOW) LOUVERS (or SCREENING) MUST BE
PROVIDED.
LOUVERS (or SCREENING) MUST BE 2” OR CLOSER TO EACH OTHER VERTICALLY.
 LOUVER (or SCREENING) MUST EXTEND AT LEAST 4” BEYOND EACH END OF REFRIGERATION UNIT.
 THIS SHEET REFLECTS THE MINUMUM REQUIRED VENTILATION. ADDITIONAL VENTILATION IS
RECOMMENDED AND WILL HELP MAINTAIN ACCEPTABLE MERCHANDISING TEMPERATURES.
3. SEE REFRIGERATION FUNDAMENTALS FOR VIEW OF CONDENSING UNIT AFTER SLIDE-OUT.
4. UNITS WITH REAR REFRIGERATION PACKAGE SLIDE-OUT (AS SHOWN BELOW) MUST MAINTAIN AT
LEAST A 3-FOOT SPACE BETWEEN REAR OF CABINET AND WALL TO ALLOW FOR SERVICE.
5. UNITS WITH FRONT REFRIGERATION PACKAGE SLIDE-OUT CAN HAVE REAR OF CABINET FLUSH TO
WALL, IF DESIRED.

2. Display Case Setup
 SCC® service drop-in refrigerated merchandiser
case consists of two sections: The upper display
case and drop-in refrigerated section.
 As both sections make up one conjoined unit, it
is both large and heavy. A team effort is required
for lowering case into the customer supplied
base.
 After lowering into base, adjust into position
allowing case to gingerly rest on counter top
without marring.
8
1. Remove Case From Skid
Caution: Case must always remain supported or
center of gravity may allow case to fall. Slide to
rear of skid and tip backward off skid while
maintaining support.
Note: Illustration below may not exact reflect every
feature or option of your particular case.
Slide
Skid
Out
3. Seal Upper Display Case to Base
 NSF® Listed Industrial Grade Silicone Sealant is
recommended.
 Clip tip to allow approximately 1/8” to 3/16”
diameter hole.
 Beginning at case rear,
run a consistent, solid
bead of silicone
around entire
perimeter.
Drop-In
Refrigerated
Section
Upper
Display
Case
Seal
Along
Here
Seal
Along
Here
INSTALLATION: CASE REMOVAL / CASE SETUP / SEALING UPPER DISPLAY CASE TO BASE

9
— Case Rear —
Main
Power
“Rocker”
Switch
Temperature
Control Module
Drop-In
Refrigerated
Section
Condensate
Pan
DO3616R
DO4816R
Thermometer
Light Switch
— Case Front —
Electrical
Box
1. Case Start-Up
 Plug cord into a certified electrical outlet with
ground.
 Turn on the Main Power Switch. Switch is in the
Drop-In Refrigerated Section on the rear right
hand side of base.
 The Temperature Control Module (LED) will
illuminate. Evaporator coil fans and the
compressor motor should turn on.
 From the front of the case, raise the deck to
confirm that the coil fans are functioning
properly.
 Turn on the lights. Light Switch is in the Upper
Display interior of the case at rear right side
(see illustration at right).
 First time lighting may require a short warm up
period for the bulbs. Slightly dim or a flickering
of new bulbs is normal.
2. Temperature Settings
 This case has been tested to maintain a
temperature at or below 5° Celsius /
41° Fahrenheit.
 When the merchandiser is in a start up mode or
has been idle for a long period of time, the unit
will require 30 minutes in order to pull-down to
temperature.
 The temperature is controlled by a Temperature
Control Module. It is located at the lower-right
area (from the case rear) of the Drop-In
Refrigerated Section. See top-right illustration
for general location.
 If a temperature setting change is required,refer
to instructions in the temperature controller
section of this operating manual.
3. Thermometers
 Either digital or spirit-filled thermometer are
located in the refrigerated compartment.
 Thermometers are to reflect internal air
temperature only (not actual food temperature).
 Use probe thermometers to determine actual
product temperatures.
 See illustrations at right for both digital and spirit
filled thermometers.
—– Main Power “Rocker” Switch —–
OFF
ON
Spirit-Filled
Thermometer
—– Digital Thermometer —–
CASE START-UP / TEMPERATURE SETTINGS / THERMOMETERS

10
MAINTENANCE FUNDAMENTALS
1. Light Ballast Access
 Light ballast is located inside the electrical j-box.
 Electrical j-box is located at lower-right side
(from the rear) of the drop-in refrigerated section.
 See illustration below.
Lamp Pins
Light Socket Light Fixture
2. Light Fixture
Removal of lamp:
 Rotate lamp (1/4 turn) so that pins are aligned in
slots and remove bulb. Carefully remove.
Installation of lamp:
 Align pins with slot.
 Insert pins into socket and rotate 1/4 turn to
secure pin contacts in socket.
 See illustration below.
— Case Rear —
DO3616R
DO4816R
Thermometer
Light Switch
— Case Front —
Ballasts Are In
Electrical J-Box
Thermometer

11
MAINTENANCE FUNDAMENTALS, CONTINUED
Warning: Disconnect power before providing maintenance and service to unit. Assembly or
disassembly and servicing is to be performed by licensed electrical contractor.
3. Evaporator Coil Fans Access and Removal
 Fans may be accessed by removing Deck (covering Fan Shroud, Fan Housing and Coil).
 See illustrations below.
Fan Shroud
Coil
Drain
Fan & Housing
Fan
Housing
Fan Shroud
Coil

12
Electrical
J-Box
Main Power
Switch
Temperature
Control
Module
Thumb
Screws
Rear
Grille
Rear Grille
Tabs Base Frame Angle
Note: Rear Grille
Tabs must be
behind Base
Frame Angle for
proper attachment.
Light Ballast
Temperature
Control Module
REFRIGERATION: ACCESS / ASSEMBLY / DISASSEMBLY / SERVICE / TEMPERATURE CONTROL
Refrigeration Access, Connections &
Servicing
1. Access To Condenser Coil For Cleaning
 No tools required!
 Access to refrigeration unit (for cleaning condenser
coil) is possible without tools.
 Remove the (2) thumb screws on rear grille.
 Flip down rear grille. Lift grille up and out (with tabs
clearing the base frame angle).
 Be careful NOT to misplace thumb screws!
 Cleaning of condenser coil can be done without
sliding out refrigeration unit.
 See cleaning schedule for cleaning guidelines.
 Replace rear grille in reverse order it was removed
(with tabs behind base frame angle).
 See illustration at right.
2. Assembly / Disassembly / Servicing
 Assembly or disassembly and servicing is to be
accomplished by licensed refrigeration contractor.
 Refrigeration unit slides directly out from lower
section to allow for servicing.
 Service connections are located in the refrigeration
unit slide-out (shown at right).
 Evaporator pan is provided for case condensation.
 Evaporator pan is to be plugged in 110V receptacle
inside base, and positioned under PVC drain and on
base frame.
 When pulling or pushing unit in or out under the case,
use caution to avoid damage to copper refrigeration
lines, hoses and cable.
 Insure that the flexible drain hose is fully inserted into
the slot of hose support for proper drainage. See
illustration on next page for general location and
specifics.
3. Temperature Control Module
 Temperature Control Module is located in the
electrical j-box.
 Temperature is controlled by temperature control
module. It is located at lower-right area (from the
rear) of the drop-in refrigerated section. See top-right
illustration for general location.
 If a temperature setting change is required, refer to
instructions in the temperature controller section of
this operating manual.

13
REFRIGERATION SLIDE-OUT EXPLODED PICTORIAL
The following images show the various parts pertaining to the Refrigeration
Unit (that is slid directly out from lower section) to be serviced.
Copper
Tubing
Refrigeration
Service Valve
Sight Glass
Capacitor
Condensing Coil
(and internal fan)
Condensing
Unit
Dryer Filter
Flexible Hose
Connections
Electrical
Junction Box
Condensate
Pan
Copper
Tubing
Receiver

14
SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE
Serial Label Location & Information Listed / Technical Information & Service
 Serial labels are located near the electrical access on your case.
 Serial labels contain electrical, temperature & refrigeration information, as well as regulatory
standards to which the case conforms.
 For additional technical information and service, see the TECHNICAL SERVICE page in this
manual for instructions on contacting Structural Concepts’ Technical Service Department.
 See images below for samples of both refrigerated and non-refrigerated serial labels.
----- Sample Serial Label For Refrigerated Case -----
----- Sample Serial Label For Non-Refrigerated Case -----

15
TROUBLESHOOTING
Issue Solution
Product is Drying Out Check the relative humidity in the store.
Water on the Floor Check that all of the hoses are connected.
Check that the drain trap is free of debris.
Excessive Fan Noise Check that the case is aligned properly.
Check that nothing is obstructing the blade rotation.
Check that the fan shroud is properly secured.
System is not Operating Confirm the utility power is on.
Check that the MAIN power switch is on.
Check that the unit is properly plugged in.
Check the circuit breaker box for tripped circuits.
Fans Not Working Check that the MAIN power switch is on.
Determine if there is ice build up blocking the fan.
Case Lights Not Working Check bulbs for proper installation and connection.
Check for burned out bulbs.
Clean dirt and dust from the bulbs to prevent flickering.
Condensing Unit Not
Operating
See Temperature Controller section of this manual for information on
your particular controller’s troubleshooting instructions.
Check that the power is turned on.
Review factory time settings on the temperature controller.

16
TROUBLESHOOTING, CONTINUED
Issue Solution
Alarm Going Off Check instructions in the temperature controller section of this manual
for your particular temperature controller.
Not Holding Temperature If a large amount of warm product was added to the case, it will take
time for the temperature to adjust.
The temperature will change during defrost mode but will return to
normal.
Check that the discharge air is not disrupted or blocked by product
(Product is above load limit level).
Check that the case is not in the sun or near a heat or air-conditioning
vent.
Is case located near front doors? Wide ranging temperature fluctuation
can occur if inside temperatures widely vary from outside temperatures.
Check the evaporator coil for ice build up (can be viewed from fan
shroud inspection cover).

17
CLEANING SCHEDULE
Cleaning Daily Weekly Monthly Task
Clean Case Exterior XClean outside surface of front curved glass with a
household or commercial glass cleaner.
XClean wood, laminate and painted surfaces with a
mild soap and water solution and a soft cloth.
XRemove rear panel. Clean under case with vacuum.
Clean Case Interior XShelves may be cleaned with a household or
commercial glass cleaner.
XRemove the decks and clean with soap and water.
XRemove rear doors and clean with a household or
commercial cleaner
X
Vacuum tub under deck if necessary. To flush out
the tub, disconnect power to the case. Remove the
deck and the fan shroud. Direct drain to floor drain
or a bucket. Run hose into the drain to flush out
debris. Hose out the tub.
X
Keep drains clean and free of debris which could
clog the drain and rob the case of needed
refrigeration.
X
Clean the dust and dirt that collects on the
condenser coil.
 Flip down rear grille (by removing the two thumb
screws at top).
 Lift grille up and out (with tabs clearing the Base
Frame Angle).
 Using an industrial strength vacuum (and
attached brush), carefully clean condenser coil.
 Caution! Be careful not to damage the fins on
the coil.)
 Replace Rear Grille in reverse order it was
removed (with tabs behind base frame angle).
 Reattach thumb screws to top of rear grille.
 See REFRIGERATION section in this manual
for illustrations.
XSlide out refrigeration package. Use a vacuum with
a hose attachment to clean area.

18
Integrated Electronic
Microprocessor Controller
Read And Save These Instructions - Page 1 of 3
Programming The Instrument
To Modify Defrost, Differential and Other Parameters
1. Press & hold “Prg” & “SET” keys together for at least five (5) seconds; display
will flash “0,” representing password prompt.
2. Press ▲ until password “22” is reached.
3. Press “SET” key to confirm password.
4. Press ▲ or ▼ to reach a category to
be modified.
5. Press “SET” to modify selected parameter.
6. Increase or decrease the value using
the ▲ or ▼ button respectively.
7. Press the “SET” key to temporarily save the
new value and return to the parameter display.
8. Press & hold the “Prg” key for 5 full seconds
to save changes. This will also mute the audible
alarm (buzzer) and deactivate the alarm relay.
Warning! Save Your Parameter Settings!
1. To store the new parameter values, PRESS
and HOLD the “Prg” key for at least 5 seconds.
2. All modifications made to parameters will be lost
if you do NOT press a button within 60 seconds.
Should this “timeout” occur, normal operational
settings (prior to modifications being made) will
resume.
3. If the instrument is switched off before pressing the
“Prg” key, all modifications to parameters will be lost.
Set
▲
aux
Prg
mute
def
▼
Prg
mute Set
Set
▼
Set
▲
aux
Prg
mute
How To Change Reading
From Fahrenheit (°F) To Celsius (°C)
1. Press and hold “Prg” and “SET” keys
together for at least 5 seconds; display will
show “0” (password prompt).
2. Press ▲ until password “22” is reached.
3. Confirm by pressing “SET” key.
4. Press ▲ or ▼ until reaching the
parameter “/ 5.”
5. Press “SET” to modify this selected parameter.
6. Press ▲ or ▼ to change value to
desired setting: “0” for Celsius (°C) or “1”
for Fahrenheit (°F).
7. Press “SET” key to temporarily save the new
value and return to the display of the parameter.
8. Press & hold “Prg” key for 5 full seconds to
save changes. Note! All values will automatically
convert to new scale. No conversion is required.
Prg
mute Set
Set
def
▼
▲
aux
Set
▲
aux
def
▼
Set
Prg
mute
To Activate / Deactivate Auxiliary Output
Press and hold the “aux” key for 1 second.
▲
aux
To Activate Manual Defrost
Press and hold “def” key for at least 5 seconds.
def
▼
To Reset Any Alarms With Manual Reset
Press and hold the “Prg” and “aux” key for
at least 1 second.
▲
aux
def
▼
▲
aux
def
Set
▲
aux
Prg
mute
▲
aux
This data derived from Carel® Controller Material:
ir33 +030220441 - rel. 2.0 - 01.05.2006.
Structural Concepts Document - Revision B Date: 4/25/2019

reset alarms w/manual reset / reset HACCP alarms / reset temp. monitoring
Summary Table of Alarm and Signals: Display, Buzzer and Relay
Integrated Electronic
Microprocessor Controller
Read And Save These Instructions - Page 2 of 3
User Interface - Display
19
This data derived from Carel® Controller Material:
ir33 +030220441 - rel. 2.0 - 01.05.2006.
Structural Concepts Document - Revision B Date: 4/25/2019

20
CODE PARAMETER UOM* TYPE MINIMUM MAXIMUM DEFAULT
/5 Select Celsius (°C) or Fahrenheit (°F) flag C01
/c1 Calibration of probe 1 °C/°F C-20 20
/c2 Calibration of probe 2 °C/°F C-20 20
St Temperature set point °C/°F Fr2 r1
rd Control delta °C/°F F20 0.1
dl Interval between defrosts hours F0250
dt1 End defrost temperature, evaporator °C/°F F-50 200
dP1 Maximum defrost duration, evaporator min F1250
d6 Display on hold during defrost - C02
dd Dripping time after defrost min F015
d/1 Display of defrost probe 1 °C/°F F- -
20
For Case
Specific
Defaults
See Serial
Label
Located
Near
Electrical
Access
On Your
Case.
For
Additional
Technical
Information
Call
Structural
Concepts
Technical
Service
Dept. at
1(800)
433.9490
Ext. 1
* Unit Of Measure
Read And Save These Instructions - Page 3 of 3
Integrated Electronic
Microprocessor Controller
Summary Table of Operating Parameters
This data derived from Carel® Controller Material:
ir33 +030220441 - rel. 2.0 - 01.05.2006.
Structural Concepts Document - Revision B Date: 4/25/2019