Hussmann SMG8B User manual

®
Æ
SMG8B & SSG8B
Medium Temperature
Self Contained
Installation &
Operation Manual
P/N 3018126_E
AUGUST 2018
IMPORTANT
Keep in store for
future reference!
MANUAL I/O - SMG8B & SSG8B
(Diamond tread bumper shown)

P/N 3018126_E ii
IMPORTANT
KEEP IN STORE FOR FUTURE REFERENCE
Quality that sets industry standards!
12999 St. Charles Rock Road • Bridgeton, MO 63044-2483
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900
www.hussmann.com
© 2018 Hussmann Corporation

INSTALLATION
UL Listing ......................... 1-1
Federal / State Regulation ............ 1-1
Hussmann Product Control ........... 1-1
Shipping Damage ................... 1-1
Location ........................... 1-1
Self Contained (Location) ............. 1-2
Unloading.......................... 1-3
Exterior Loading .................... 1-3
Shipping Skid ...................... 1-3
Merchandiser Leveling ............... 1-3
Serial Plate Location ................. 1-4
Refrigeration Unit Access ............. 1-4
Glass Positioning .................... 1-5
Adjustment Bolt .................... 1-6
Optional Display Pan,
Wire Rack, and Divider Kit ........... 1-9
Self-Contained Refrigeration Equipment
Start Up Check List ................ 1-10
ELECTRICAL / REFRIGERATION
Merchandiser Electrical Data .......... 2-1
Field Wiring ........................ 2-1
Electrical Connections . . . . . . . . . . . . . . . . 2-1
Electrical Outlet (Optional) ........... 2-1
Refrigeration (Self Contained Models) .. 2-1
Waste Outlet and Water Seal .......... 2-2
START UP / OPERATION
Controller Operation ................. 3-1
Controller Parameters ................ 3-3
Dixell Control Sensor Location ........ 3-6
Controls and Adjustments ............ 3-7
TEV Adjustment .................... 3-8
Self-Contained (Location) ............ 3-8
Load Limits ........................ 3-9
Stocking ........................... 3-9
MAINTENANCE
Care and Cleaning ................... 4-1
Removing Scratches from Bumper ...... 4-2
Cleaning Under Fan Plenum .......... 4-2
Cleaning Discharge Air Louvers ....... 4-2
Cleaning Stainless Steel Surfaces ....... 4-3
Cleaning Coils ...................... 4-3
Cleaning Optional Drain Pan .......... 4-4
Self-Contained Refrigeration Equipment
Maintenance Check List .............. 4-5
SERVICE
Replacing Fan Motors and Blades ...... 5-1
Replacing Cylinders — Single Pane Glass .. 5-2
Replacing Single Pane Front Glass ..... 5-3
Replacing Glass Hand Grip ........... 5-4
SAFE-NET III
Safe-NET III User Instructions ........ 6-1
Display (Optional) ................... 6-2
Start Up ........................... 6-2
Sequence of Operation Diagram ....... 6-3
Alarms and Codes ................... 6-4
Manual Defrost ..................... 6-4
WARRANTY
TABLE OF CONTENTS iii
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B

REVISION HISTORY
REVISION D - Added instruction for adjusting and
replacing the glass panes. changed controller to Dixell
XR75
REVISION C - Removed logo, Page 1-1.
REVISION B - Changed Drawing on Page 3-10. Updated
Page 3-1 added Page 3-2, Updated Drawings on Page 3-7
Added Load Limit Drawing to Page 3-10
ORIGINAL ISSUE — DECEMBER 2016
iv
* * * * * * * * * * * * * * * * * * * * * * * * * *
ANSI Z535.5 DEFINITIONS
• DANGER – Indicate[s] a hazardous
situation which, if not avoided, will
result in death or serious injury.
• WARNING –Indicate[s] a hazardous
situation which, if not avoided, could
result in death or serious injury.
• CAUTION –Indicate[s] a hazardous
situation which, if not avoided, could
result in minor or moderate injury.
• NOTICE – Not related to personal injury –
Indicates[s] situations, which if not avoided,
could result in damage to equipment.



P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

P/N 3018126_E 1-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
UL LISTING
These merchandisers are manufactured to meet
ANSI/ UL 471 standard requirements for safe-
ty. Proper installation is required to maintain
the listing.
FEDERAL / STATE REGULATION
These merchandisers at the time they are man-
ufactured, meet all federal and state/ provincial
regulations. Proper installation is required to
ensure these standards are maintained. Near
the serial plate, each merchandiser carries a
label identifying the environment for which the
merchandiser was designed for use. A Type II
fan speed control kit is required for each mer-
chandiser to operate at Type II conditions.
ANSI/NSF-7 Type I – Display Refrigerator /
Freezer
Intended for 75°F (24°C) / 55%RH Ambient Application
ANSI/NSF-7 Type II – Display Refrigerator / Freezer
Intended for 80°F / 55%RH Ambient Application
ANSI/NSF-7 – Display Refrigerator
Intended for Bulk Produce
HUSSMANN PRODUCT CONTROL
The serial number and shipping date of all
equipment is recorded in Hussmann’s files
for warranty and replacement part purposes.
All correspondence pertaining to warranty or
parts ordering must include the serial number
of each piece of equipment involved. This is to
ensure the customer is provided with the cor-
rect parts.
SHIPPING DAMAGE
All equipment should be thoroughly examined
for shipping damage before and during
unloading. This equipment has been carefully
inspected at our factory. Any claim for loss
or damage must be made to the carrier. The
carrier will provide any necessary inspection
reports and/or claim forms.
Apparent Loss or Damage
If there is an obvious loss or damage, it must
be noted on the freight bill or express receipt
and signed by the carrier’s agent; otherwise,
carrier may refuse claim.
Concealed Loss or Damage
When loss or damage is not apparent until
after equipment is uncrated, retain all packing
materials and submit a written response to the
carrier for inspection within 15 days.
LOCATION
These merchandisers are designed for
displaying products in air conditioned stores
where temperature is maintained at or below
the ANSI / NSF-7 specified level and relative
humidity is maintained at or below 55%.
Placing refrigerated merchandisers in direct
sunlight, near hot tables or near other heat
sources could impair their efficiency. Like
other merchandisers, these merchandisers are
sensitive to air disturbances. Air currents
passing around merchandisers will seriously
impair their operation. Do NOT allow air
conditioning, electric fans, open doors or
windows, etc. to create air currents around the
merchandiser.
INSTALLATION
Recommended operating ambient
temperature is between
65°F (18°C) to 75°F (23.9°C).
Maximum relative humidity is 55%.

1-2 InstallatIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
SELF CONTAINED (LOCATION)
Product should always be maintained at proper
temperature. This means that from the time
the product is received, through storage, prepa-
ration and display, the temperature of the
product must be controlled to maximize the
life of the product.
Besure to position self contained
merchandisers properly.
SELF CONTAINED models have vented base
panels to allow air circulation through the
condensing unit. Allow for a minimum 4 in.
clearance from walls, merchandisers, and any
other large objects near the merchandiser’s
vented base panels (for self contained models).
Blocking or restricting air flow will adversely
affect performance and may damage the refrig-
eration system.
Do NOT remove shipping crate until the
merchandiser is positioned
for installation.
Maintain minimum 4-inch
air clearance at rear of
case
Air Intake
Air Exhaust
Air Intake
Air Exhaust
Side View of Case
Top View of Case
This warning does not mean that Hussmann products
will cause cancer or reproductive harm, or is in
violation of any product-safety standards or
requirements. As clarified by the California State
government, Proposition 65 can be considered more of
a‘right to know’ law than a pure product safetylaw.
When used as designed, Hussmann believes that our
products are notharmful. We provide the Proposition
65 warning to stay in compliance with California State
law. It is your responsibility to provide accurate
Proposition 65 warning labels to your customers when
necessary. For more information on Proposition 65,
please visit the California State government website.
August 31, 2018

P/N 3018126_E 1-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
UNLOADING
Unloading from Trailer:
Lever Bar (also known as a Mule, Johnson
Bar, J-bar, Lever Dolly, or Pry Lever)
Move the merchandiser as close as possible to
its permanent location and remove all packaging.
Check for damage before discarding packaging.
Remove all separately packed accessories such
as kits and shelves.
Improper handling may cause damage to the
merchandiser when unloading. To avoid dam-
age:
1. Do not drag the merchandiser out of the
trailer. Use a Johnson bar (mule).
2. Use a forklift or dolly to remove the
merchandiser from the trailer.
EXTERIOR LOADING
Do NOT walk on top of merchandisers or
damage to the merchandisers and serious
personal injury could occur.
merchandisers are not structurally
designed to support external loading
such as the weight of a person. Do not place
heavy objects on the merchandiser.
SHIPPING SKID
Each merchandiser is shipped on a skid to
protect the merchandiser’s base and to make
positioning the case easier.
Unscrew the case from the skid. The fixture
can now be lifted off the crate skid. Lift only at
base of skid! Remove any braces and/or skids
attached.
DO NOT LAY MERCHANDISER OVER
ON THE FLOOR TO REMOVE SKID.
Check floor where cases are to be set to see if
it is a level area. Determine the highest part of
the floor.
MERCHANDISER LEVELING
Besure to position merchandisers properly.
Level the merchandiser by all four corners.
Merchandiser(s) must be installed level to
ensure proper operation of the refrigeration
system, and to ensure proper drainage of
defrost water.
Do NOT stand or walk on top of
merchandiser. Do not store items or
ammable materials atop the unit.
Remove bolts
aer case is rolled
o shipping rail.
3 places on the
front and 3 places
on the rear of the
case.
Remove bolts to be
able to roll case o
of shipping rails. 3
places on the front
and 3 places on the
rear of the case.
Shipping Brace

1-4 InstallatIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
SERIAL PLATE LOCATION
The serial plate is located on the back of the
case on the left-hand side. The serial plate con-
tains information specific to the case as well
as a QR code that allows you to view replace-
ment parts and data sheets on a smart phone.
REFRIGERATION UNIT ACCESS
Panels on the front and rear of the case may be
removed by lifting the panel straight upward
to clear lower brackets, and then down to
remove. The panel is installed by reversing the
above procedure. Ensure all panels are installed
to prevent air circulation problems.
The case is shipped with the the front left
panel removed, and the two lower back panels
removed. These panels must be installed during
installation.
Serial Plate
Back View of Case
Optional
Drain Pan
Refrigeration
Unit Location
Back View of Case
Front View of Case
Refrigeration
Unit Location
Front panel shipped
removed and must be
installed in the eld.
Case Power
Cord
Convenience Outlet
Power Cord
Rear panels are shipped
removed and must be
installed in the eld.

P/N 3018126_E 1-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
GLASS POSITIONING
Check the following to improve opening or
closing of the merchandiser front glass.
1. Has the merchandiser been leveled
according to preceding paragraphs?
2. Is the glass handle installed correctly?
Verify the glass is bottomed out the length
of the handle. A bowed handle indicates the
glass may not be bottomed out at the center
of the handle.
The handle must be removed before it can be
repositioned. The handle is held in place with
silicone which must be completely removed
from the handle and the glass. Remove the
handle by pulling it away from the glass (do
not use tools to pry this loose). A damaged
or bent handle must be replaced. Apply new
silicone into the handle and firmly press onto
the glass.
3. Is the glass seated in the clamp hardware
correctly?
Verify glass is bottomed out in clamp
hardware. If the glass is not bottomed out in
the clamp hardware it can be re-positioned as
follows:
A. Remove the glass and clamp hardware
from the merchandiser by opening the
glass and loosening set screws in hinge
(Metric 3 millimeter set screws).
B. Slide the glass and clamp hardware to the
side out of the hinges and lay them on an
appropriate work surface.
Note: Adjacent glass must be closed.
C. Loosen the 8 set screws on the underside
of the clamp hardware.
D. Push the clamp hardware onto the glass
until bottomed out.
E. The clamp hardware must overhang the
glass by an equal amount on each side.
F. Tighten set-screws and re-install on
merchandiser. Apply a drop of Loctite
242 or equivalent thread locking uid onto
each set screw of the glass clamp assembly.
Tighten all screws with a TORX T15 bit and
re-install onto merchandiser.
IMPORTANT: Tighten all glass clamp set screws
to 26 inch lbs. Verify bit is in good condition and
not worn out. When set screws are tightened, glass
is rmly held in place by glass clamps.
GLASS MUST
BE BOTTOMED OUT
IN HANDLE OPEN GLASS AND LOOSEN 2 SET SCREWS TO
ALLOW GLASS AND CLAMP HARDWARE TO SLIDE
(1 SET SCREW AT EACH HINGE)
HINGE HINGE
GLASS MUST
BE BOTTOMED OUT IN
CLAMP HARDWARE

1-6 InstallatIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
4. Is the glass hitting the end or adjacent
glass? Slowly open and close the glass to
inspect. If the glass is hitting the end or
adjacent glass it may not be positioned
correctly from left to right. This can be
adjusted as follows:
• Loosen the 2 screws holding the hinge to
the clamp hardware (Metric 3 millimeter
screws).
• Slide the clamp hardware to either side as
needed.
• Tighten the screws and check glass for
proper operation.
5. Is the glass still hitting adjacent glass?
Slowly open and close the glass to inspect.
Optional Flexible Wiper Gasket
There may be an optional flexible wiper
gasket that is attached to each side. These
are designed to overlap each other, sealing
the gap between the glass and allowing side-
to-side glass adjustment. After all glass has
been adjusted as defined in Step 4, the flexible
portion of one gasket at a joint may be
trimmed with a razor knife. Be sure that the
remaining wiper gasket seals the gap. Verify
proper operation.
ADJUSTMENT BOLT
If the glass still does not open or close
correctly, adjustment of the top frame may be
necessary.
This merchandiser is equipped with an
adjustment bolt at the top rear of the
merchandiser to raise or lower the glass. This
allows for improvements in the glass operation
and sealing. The following outlines how to
access the adjustment bolt. The top must be
free to move as the adjustment bolt is turned.
1. Loosen joining or end bolts at top
of merchandiser, (2 at each end of
merchandiser).
2. If caulk or silicone has been applied
between merchandiser joints or ends in the
top area it must be removed.
3. Remove rear doors.
Optional Flexible Wiper Gasket
Glass
LOOSEN END
OR CASE
JOINING BOLT
LOOSEN END OR
CASE JOINING BOLT
LOOSEN THESE SCREWS TO
ADJUST GLASS AND CLAMPS
FROM SIDE TO SIDE
CLAMP
HARDWARE

P/N 3018126_E 1-7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
4. Remove screws at top of rear door frame.
The bottom screws do not need to be
removed.
5. Pull back the top of the door frame
approximately 2 inches. This will allow
clearance for removal of the stainless steel
top liner and trim pieces.
6. Some models have a Phillips truss head
screw holding the stainless steel liner to
the trim. These screws are visible from the
rear of the merchandiser to the side of the
door frame. These must be removed.
7. Remove stainless steel top liner by
grabbing the rear flange and pulling back.
Note: It is possible to access the adjusting
bolt by using a small swivel socket without
removing the stainless top liner. To do
this, the stainless steel trim and foam
noted in Step 8 must be removed.
8. Remove stainless steel trim pieces and
foam insulation on each side of the door
frame.
REMOVE 2 SCREWS
AT TOP OF DOOR FRAME
(IN DOOR TRACKS)
STAINLESS STEEL TRIM
(FOAM INSULATION IS
UNDER TRIM)
PHILLIPS
TRUSS
HEAD
SCREW
STAINLESS
STEEL
LINER
PULL TOP OF DOOR FRAME
BACK AND REMOVE TOP
STAINLESS STEEL LINER
STAINLESS
STEEL
TOP
DOOR FRAME
ADJUSTING
BOLT
SET
SCREW

1-8 InstallatIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
9. The set screw and adjusting bolt are now
accessible.
• The set screw must be backed out before
turning the adjusting bolt (1/8inch set
screw). The set screw serves as a positive
stop.
• The adjusting bolt should be turned no
more than a half-turn before inspecting
glass position and operation.
• Turning the adjusting bolt clockwise will
raise the front glass.
• Turning the adjusting bolt counter-
clockwise will lower the front glass.
• Once the glass position is set, tighten the set
screw (positive stop).
10. Once glass is positioned and operating
correctly, re-install components and
hardware removed.
Note: The door frame is designed to have a
tight fit. A putty knife between the top of the
frame and the insulated panel will help guide
it into position.
11. Re-apply caulk or silicone as required.
12. Verify glass is positioned and operating
correctly.
Adjusting Bolt
Set Screw
Positive Stop
Pivot Support

P/N 3018126_E 1-9
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
OPTIONAL DISPLAY PAN, WIRE RACK,
AND DIVIDER KIT
The wire shelf with divider fits in the case. The
divider slides from one end to the other sepa-
rating meat and seafood products.
Wire Shelf
Divider
Divider Proper Orientation on SSG
Stainless Steel
Display Pan

1-10 InstallatIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
Hussmann Self-Contained Refrigeration Equipment Start Up Check List
***Please note that failure to follow this start-up document may void your factory warranty***
Form HSCW01 Rev. 30MAY12 P/N 0525209_B
Step Startup Activity Check
1 Locate, read and maintain install/operation manual in a safe place for
future reference.
2 Examine unit. Confirm there is NO damage or concealed damage.
3 Level the unit, side to side and front to rear.
4 Remove all shipping brackets/compressor straps/bolts etc.
5 Unit must be run on a dedicated electrical circuit without the use of
an extension cord.
6 Ensure that the proper electrical requirements for the equipment are
supplied.
7 Verify field electrical connections are tight.
8 Verify all electrical wiring is secured and clear of any sharp edges or
hot lines.
9 Verify the condensate drain line is properly trapped and pitched.
10 Verify all required clearances on the sides and back of unit.
11 Verify there are no air disturbances external to the unit. Heat and air
registers, fans, and doors etc.
Advise owner/operator that merchandiser must operate at temperature for 24 hrs prior to loading
with product.
LEGAL DISCLAIMER:
Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or when the product is installed or operated in a manner
contrary to the printed instructions covering installation and service which accompanied such product.

P/N 3018126_E 2-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
MERCHANDISER ELECTRICAL DATA
Refer to the technical data sheets and merchandiser
serial plate for electrical information.
FIELD WIRING
Field wiring must be sized for component
amperes stamped on the serial plate. Actual
ampere draw may be less than specified.
ELECTRICAL CONNECTIONS
All wiring must be in compliance with NEC
and local codes.
ELECTRICAL OUTLET (OPTIONAL)
Before the merchandiser is connected to any
wall circuit, use a voltmeter to check that the
outlet is at 100% of the rated voltage. The wall
circuit must be dedicated for the merchandis-
er. Failure to do so voids the warranty. Do
not use an extension cord. Never plug in more
than one merchandiser per electrical circuit.
• Always use a dedicated circuit with the
amperage stated on the unit.
• Plug into an outlet designed for the plug.
• Do not overload the circuit
• Do not use long or thin extension cords.
Never use adapters.
• If in doubt, call an electrician.
Self-contained models have factory-installed
power cords attached at the electrical box. There
are two power cords at the rear of the case. One
cord is for case power, and the power cord is for
the convenience outlet power. Each cord must be
on a separate circuit.
REFRIGERATION
(Self Contained Models)
Each self contained model is equipped with
its own condensing unit and control panel
located beneath the display area. The correct
type of refrigerant will be stamped on each
merchandiser’s serial plate. The merchan-
diser refrigeration piping is leak tested. The
unit is charged with refrigerant, and shipped
from the factory with all service valves open.
ELECTRICAL / REFRIGERATION
ALWAYS CHECK THE SERIAL PLATE FOR
COMPONENT AMPERES
3011606 A
CORDSET-NEMA
L5-20P FOR 125V
20A SC CASE
NEMA L5-20P PLUG
20A 125V UL/CSA
BLACK
GREEN
WHITE

2-2 ElEctrIcal / rEfrIgEratIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
WATER OUTLET AND WATER SEAL
The condensate water outlet is factory installed
on the case.
For cases equipped with a drain pan, this
water seal drains into the pan located beneath
the merchandiser.
NOTE: All lower base panels must be in place
when the refrigerator is operating.
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting any connection or repair.
Product will be degraded and may spoil if
allowed to sit in a non-refrigerated area.
— LOCK OUT / TAG OUT —
To avoid serious injury or death from electri-
cal shock, always disconnect the electrical
power at the main disconnect when servicing
or replacing any electrical component. This
includes, but is not limited to, such items as
doors, lights, fans, heaters, and thermostats.
Merchandiser must be grounded.
Do not remove the power supply cord ground.
Risk of Electric Shock. If cord or plug
becomes damaged, replace only with
a cord and plug of the same type.

PB startup / opEratIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
P/N 3018126_E 3-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
START UP / OPERATION
The optional evaporator fan remains ON when
the adjustment knob is in the OFF position.
CONTROLLER OPERATION
Follow the tables to use the commands. The
keypad display is located on the front of the
merchandiser.
Follow the LED commands to operate and
control the case’s lighting.
How to see the setpoint
1. Push and immediately release the SET key.
The display will show the setpoint value.
2. Push and immediately release the SET key or
wait for 5 seconds to display the present value
again.
How to change the setpoint:
The controller is shipped from the factory with
Frozen Food settings. To modify the temperature
for Ice Cream application, follow these
instructions:
1. Push and hold the SET key for more than 2
seconds to change the setpoint value.
2. The value of the setpoint will be displayed and
the °C or °F LED starts blinking.
3. To change the setpoint value push the UP or
DOWN arrows within 10 seconds.
4. To memorize the new setpoint value, push the
SET key again or wait 10 seconds.
How to start a manual defrost:
Push and hold the DEF key for more than 2
seconds and a manual defrost will start.
How to lock the keyboard:
1. Keep the UP + DOWN arrow keys pressed
for more than 3 seconds.
2. The PoF message will be displayed and the
keyboard will be locked. At this point it will
be possible to see the setpoint of the MAX or
Min temperature stored only.
3 If a key is pressed for more than 3 seconds the
PoF message will be displayed.
4 • XR75CX I&O Manual 026-1210 Rev 0 09-FEB-2011
4 Front Panel
Commands
4.1. Keys and Functions
Table 4-1 shows the keys that are found on the
front panel of the XR75CX controller and their corre-
sponding functions:
4.2. Use of LEDS
Each LED function is described in Table 4-2:
Figure 4-1 - XR75CX Front Panel
Key Function
Press to display target setpoint, to select a pa-
rameter in programming mode, or to confirm
an operation
Starts a manual defrost
Press the UP arrow to see the MAX tempera-
ture, to browse the parameter codes in pro-
gramming mode, or to increase the currently
displayed temperature value.
Press the DOWN arrow to see the MIN tem-
perature, to browse the parameter codes in
programming mode, or to decrease the cur-
rently displayed temperature value.
Table 4-1 - XR75CX Front Panel Keys and Functions
Switches the device ON and OFF, if
onF = oFF
Switches the light ON and OFF, if oA1 = Lig
Locks/Unlocks the keyboard
To enter programming mode
Returns to room temperature display
LED Mode Function
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
ON Fans enabled
Flashing Fans delay after defrost in progress.
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enabled
ON Light ON
ON30 Auxiliary relay ON
ON Measurement unit
Flashing Programming phase
Table 4-2 - LEDs
Table 4-1 - XR75CX Front Panel Keys and Functions
4 • XR75CX I&O Manual 026-1210 Rev 0 09-FEB-2011
4 Front Panel
Commands
4.1. Keys and Functions
Table 4-1 shows the keys that are found on the
front panel of the XR75CX controller and their corre-
sponding functions:
4.2. Use of LEDS
Each LED function is described in Table 4-2:
Figure 4-1 - XR75CX Front Panel
Key Function
Press to display target setpoint, to select a pa-
rameter in programming mode, or to confirm
an operation
Starts a manual defrost
Press the UP arrow to see the MAX tempera-
ture, to browse the parameter codes in pro-
gramming mode, or to increase the currently
displayed temperature value.
Press the DOWN arrow to see the MIN tem-
perature, to browse the parameter codes in
programming mode, or to decrease the cur-
rently displayed temperature value.
Table 4-1 - XR75CX Front Panel Keys and Functions
Switches the device ON and OFF, if
onF = oFF
Switches the light ON and OFF, if oA1 = Lig
Locks/Unlocks the keyboard
To enter programming mode
Returns to room temperature display
LED Mode Function
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
ON Fans enabled
Flashing Fans delay after defrost in progress.
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enabled
ON Light ON
ON30 Auxiliary relay ON
ON Measurement unit
Flashing Programming phase
Table 4-2 - LEDs
Table 4-1 - XR75CX Front Panel Keys and Functions
4 • XR75CX I&O Manual 026-1210 Rev 0 09-FEB-2011
4 Front Panel
Commands
4.1. Keys and Functions
Table 4-1 shows the keys that are found on the
front panel of the XR75CX controller and their corre-
sponding functions:
4.2. Use of LEDS
Each LED function is described in Table 4-2:
Figure 4-1 - XR75CX Front Panel
Key Function
Press to display target setpoint, to select a pa-
rameter in programming mode, or to confirm
an operation
Starts a manual defrost
Press the UP arrow to see the MAX tempera-
ture, to browse the parameter codes in pro-
gramming mode, or to increase the currently
displayed temperature value.
Press the DOWN arrow to see the MIN tem-
perature, to browse the parameter codes in
programming mode, or to decrease the cur-
rently displayed temperature value.
Table 4-1 - XR75CX Front Panel Keys and Functions
Switches the device ON and OFF, if
onF = oFF
Switches the light ON and OFF, if oA1 = Lig
Locks/Unlocks the keyboard
To enter programming mode
Returns to room temperature display
LED Mode Function
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
ON Fans enabled
Flashing Fans delay after defrost in progress.
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enabled
ON Light ON
ON30 Auxiliary relay ON
ON Measurement unit
Flashing Programming phase
Table 4-2 - LEDs
Table 4-1 - XR75CX Front Panel Keys and Functions
All cases manufactured after August 2017, use the
Dixell XR75 Controller. For cases manufactured before
this date, refer to the Safe-NET III user instructions in
Section 6 of this manual.

3-2 startup / opEratIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
P/N 3018126_E 3-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
How to unlock the keyboard:
Press the UP and DOWN arrow keys together
for more than 3 seconds until the “Pon” message
displays.
Alarms:
P1 Discharge temperature probe failure
P2 Defrost termination probe failure
HA Max temperature alarm
LA Min temperature alarm
How to set defrost start time
Defrost occurs 24 hours after startup, then will
take place every 24 hours
See 3-6 for sensor location.
White
(Common for
Both Sensors)
Control Sensor
(Green Wire)
Black Sensor: Control (Air)
Typical Sensor to Control Configuration
Black
(Air)
Black
Safe-NET Controller
Condensate
Pan Heater
Control Sensor
Location
Right Side View

3-2 startup / opEratIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
P/N 3018126_E 3-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
XR 75
Code
XR 75 Parameter XR 75 Function
XR 75
Default
SSG SMG
SEt Temperature Setpoint LS to US -5 17 19
Hy Differential
(0.1 to 25.5°C / 1 to 255°F)Intervention differential for setpoint. Compressor
Cut IN is setpoint + differential (Hy).Compressor Cut OUT is when the
temperature reaches the setpoint.
2 9 6
LS Minimum setpoint (-100°C to SEt/-148°F to SEt)Sets the minimum value for the setpoint. -50 10 12
US Maximum setpoint (SEt to 110°C/ SEt to 230°F)Set the maximum value for the setpoint. 110 33 26
ot Thermostat probe calibration
(-12.0 to 12.0°C; -120 to 120°F)Allows to adjust possible offset of the
thermostat probe.
0 0 0
P2P Evaporator probe presence
n = not present: the defrost stops by time y = present: the defrost stops
by temperature
Y n n
oE Evaporator probe calibration
(-12.0 to 12.0°C; -120 to 120°F)Allows to adjust possible offset of the
evaporator probe.
0 0 0
P3P Third probe presence (P3)
n = not present; the terminals 18-20 operate as digital input y = present;
the terminals 18-20 operate as third probe
n n n
o3 Third probe calibration (P3)
(-12.0 to 12.0°C; -120 to 120°F) Allows to adjust possible offset of the third
probe.
0 0 0
P4P Fourth probe presence (n = not present; y = present) n n n
o4 Fourth probe calibration (-12.0 to 12.0°C) Allows to adjust possible offset of the fourth probe. 0 0 0
Ods Outputs activation delay at startup
(0 to 255 min) This function is enabled at the initial start up of the device
and inhibits any output acti-vation for the period of time set in the
parameter.
0 0 0
Ac Anti-short cycle delay
(0 to 50 min) Minimum interval between the compressor stop and the
following restart.
1 2 2
rtr
Percentage of the second andfirst
probe for regulation (0 to100; 100
= P1, 0 = P2 )
Allows to set the regulation according to the percentage of the first and
second probe,as for the following formula (rtr(P1-P2)/100 + P2).
100 100 100
CCt
Compressor ON time during
continuous cycle
(0.0 to 24.0 hr; res. 10 min)Allows to set the length of the continuous cycle:
compressor stays ON without interruption for the CCt time. Can be used, for
instance, when the room is filled with new products.
0 0 0
CCS Setpoint for continuous cycle (-100 to 150°C)Sets the setpoint used during the continuous cycle. -5 17 19
Con
Compressor ON time with faulty
probe
(0 to 255 min)Time during which the compressor is active in case of faulty
thermostat probe. WithCon = 0, compressor is always OFF.
15 6 6
CoF
Compressor OFF time with faulty
probe
(0 to 255 min)Time during which the compressor is OFF in case of faulty
thermostat probe. When CoF= 0, compressor is always active.
30 2 2
CF Temperature measurement unit
°C = Celsius, °F = Fahrenheit, (CAUTION! When the measurement unit is
changed, the setpoint and the values of the parameters Hy, LS, US, ot, ALU
and ALL have to be checked and modified if necessary).
C F F
rES Resolution (for °C) (in = 1°C; dE = 0.1°C) Allows decimal point display. dE dE dE
Lod Device display
(P1; P2, P3, P4, SEt, dtr) Selects which probe is displayed by the device: P1 =
Thermostat probe P2 = Evaporator probe; P3 = Third probe (only for models
with this option enabled), P4 = Fourth probe, SEt= setpoint, dtr =
percentage of visualization
P1 P1 P1
Red X- REP display (optional)
(P1; P2, P3, P4, SEt, dtr) Selects which probe is displayed by the device: P1 =
Thermostat probe P2 = Evaporator probe; P3 = Third probe (only for models
with this option enabled), P4 = Fourth probe, SEt= setpoint, dtr =
percentage of visualization
P1 P1 P1
dLy Display delay
(0 to 20.0 min; resul. 10 seconds) When the temperature increases, the
display is updated of 1°C/1°F after this time.
0 0 0
dtr
Percentage of the second and first
probe for visualization when Lod =
dtr (0 to 100; 100 = P1, 0 = P2 )
If Lod = dtr, it allows to set the visualization according to the percentage of
the first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
50 100 100
EdF
Defrost mode (only for controller
with RTC)
rtC = Real Time Clock mode. Defrost time follows Ld1 to Ld6 parameters on
workdays and Sd1 to Sd6 on holidays. in = interval mode. The defrost starts
when the time Idf is expired.
rtC in in
tdF Defrost type EL = electrical heater in = hot gas EL EL EL
dFP
Probe selection for defrost
termination
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P2 P1 P1
dtE Defrost termination temperature
(-50 to 50°C/ -58 to 122°F) (Enabled only when EdF = Pb) Sets the temperature
measured by the evaporator probe, which causes the end of defrost.
848 48
IdF Interval between defrost cycles
(0 to 120 hr) Determines the time interval between the beginning of two
defrost cycles.
624 24
MdF (Maximum) length for defrost
(0 to 255 min) When P2P = n, (not evaporator probe: timed defrost) it sets
the defrost duration, when P2P = y (defrost end based on temperature) it sets
the maximum length for defrost.
30 90 90
dSd Start defrost delay
(0 to 99 min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
0 0 0
dFd
Temperature displayed during
defrost
(rt = real temperature; it = temperature at defrost start; SEt = setpoint; dEF =
dEF la-bel)
it Def Def
dAd MAX display delay after de-frost
(0 to 255 min)Sets the maximum time between the end of defrost and the
restarting of the real roomtemperature display.
30 30 30
Fdt Drip time
(0 to 120 min)Time interval between reaching defrost termination
temperature and the restoring of thecontrollers normal operation. This time
allows the evaporator to eliminate water drops that might have formed due
to defrost.
0 0 0
dPo First defrost after start-up (y = immediately; n = after the IdF time) n y y
dAF Defrost delay after continuouscycle
(0 to 23.5 hr)Time interval between the end of the fast freezing cycle and the
following defrost relatedto it.
0 0 0
FnC Fans operating mode
C-n = runs with the compressor, OFF during defrost O-n = continuous mode,
OFF during defrost C-y = runs with the compressor, ON during defrost
O-y = continuous mode, ON during defrost
O-n O-y O-y
Fnd Fans delay after defrost (0 to 255 min) Interval between end of defrost and evaporator fans start 10 0 0
FCt
Temperature differential avoiding
short cycles of fans
(0 to 59°C; FCt = 0 function disabled) If the difference in temperature
between the evaporator and the room probes is morethan the value of the
FCt parameter, the fans are switched ON.
10 0 0
FSt Fans stop temperature
(-50 to 50°C/ 122°F) Setting of temperature, detected by the evaporator
probe, above which fans are always OFF.
2 2 2
Fon Fan ON time
(0 to 15 min) With Fnc=C_n or C_y, (fan activated in parallel with
compressor). Sets the evaporator fan ON cycling time when the compressor is
OFF. When Fon=0 and FoF not equal to 0, the fans are always OFF, with
Fon=0 and FoF=0, the fans are always OFF.
0 0 0
FoF Fan OFF time
(0 to 15 min)With Fnc=C_n or C_y, (fan activated in parallel with compressor).
Sets the evaporator fan OFF cycling time when the compressor is OFF. When
Fon=0 and FoF not equal to 0, the fans are always OFF, when Fon=0 and
FoF=0, the fans are always OFF.
0 0 0
FAP
Probe selection for fan
management
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P2 nP nP
ACH
Kind of regulation for auxiliary
relay
Ht = heating CL = cooling CL CL CL
SAA Setpoint for auxiliary relay
(-100 to 150.0°C; -148 to 302°F) Defines the room temperature setpoint to
switch auxiliary relay.
0 0 0
SHy Differential for auxiliary output
(0.1 to 25.5°C/ 1 to 255°F)Intervention differential for auxiliary output
setpoint. When ACH = CL, AUX Cut in is SAA + SHy; AUX Cut out is SAA
When ACH = Ht , AUX Cut in is SAA - SHy; AUX Cut out is SAA
2 2 2
ArP Probe selection for auxiliary
nP = no probe, the auxiliary relay is switched only by the digital input P1 =
Probe 1 (thermostat probe) P2 = Probe 2 (evaporator probe) P3 =
Probe 3 (display probe) P4 = Probe 4
nP nP nP
Sdd Auxiliary relay OFF during defrost
n = the auxiliary relay operates during defrost y = the auxiliary relay is
switched OFF during defrost
n n n
ALP Probe selection for alarm
nP = no probe, the temperature alarms are disabled P1 = Probe 1
(thermostat probe) P2 = Probe 2 (evaporator probe) P3 = Probe 3 (display
probe) P4 = Fourth probe
P1 P1 P1
ALC Temperature alarms configuration
(Ab; rE) Ab = absolute temperature: alarm temperature is given by the ALL or
ALU values. rE= temperature alarms are referred to the setpoint.
Temperature alarm is enabled whenthe temperature exceeds the SEt + ALU or
SEt - ALL values.
Ab Ab Ab
ALU Maximum temperature alarm
(SEt to 150°C; SEt to 302°F)When this temperature is reached, the alarm is
enabled, after the ALd delay time.
110 56 56
ALL Minimum temperature alarm
(-100 to SEt; -148°C to 230°F)When this temperature is reached, the alarm is
enabled, after the ALd delay time.
-50 10 10
AFH
Differential for temperature alarm
recovery
(0.1 to 25.5°C; 1 to 45°F) Intervention differential for recovery of
temperature alarm. It is also used for the restartof the fan when the FSt
temperature is reached.
2 4 4
ALd Temperature alarm delay
(0 to 255 min) Time interval between the detection of an alarm condition
and alarm signaling.
15 30 30
dAo
Exclusion of temperature alarmat
start-up
(from 0.0 min to 23.5 hr)Time interval between the detection of the
temperature alarm condition after devicepower ON and alarm signaling.
1.3 2 2
AP2
Probe selection for temperature
alarm of condenser
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P4 nP nP
AL2
Low temperature alarm of
condenser
(-100 to 150°C) When this temperature is reached, the LA2 alarm is signaled,
possibly after the Ad2 delay.
-40 -40 -40
AU2
High temperature alarm of
condenser
(-100 to 150°C)When this temperature is reached, the HA2 alarm is signaled,
possibly after the Ad2 delay.
110 110 110
AH2
Differential for temperature
condenser alarm recovery
(0.1 to 25.5°C; 1 to 45°F) 552 52
Ad2
Condenser temperature alarm
delay
(0 to 255 min)Time interval between the detection of the condenser alarm
condition and alarm signaling.
15 15 15
dA2
Condenser temperature alarm
exclusion at start up
(from 0.0 min to 23.5 hr, res. 10 min) 1.3 1.3 1.3
bLL
Compressor OFF with low
temperature alarm of condenser
n = no: compressor keeps on working Y = yes, compressor is switched OFF
until the alarm is present, in any case regulation restarts after Ac time at
minimum.
n n n
AC2
Compressor OFF with high
temperature alarm of condenser
n = no: compressor keeps on working Y = yes, compressor is switched OFF
until the alarm is present, in any case regulation restarts after Ac time at
minimum.
n n n
tbA
Alarm relay silencing (with
oA3=ALr)
n= silencing disabled: alarm relay stays ON until alarm condition lasts y
=silencing enabled: alarm relay is switched OFF by pressing a key during an
alarm
y y y
oA3 Fourth relay configuration (1-4)
dEF, FAn: do not select it! ALr: alarm; Lig: light; AUS: Auxiliary relay; onF:
alwaysON with device ON; db= neutral zone; cP2 = do not select it!; dEF2: do
not select it!; HES: night blind
Lig Alr Alr
AOP Alarm relay polarity
Set if the alarm relay is open or closed when an alarm happens. CL=
terminals 1-4 closed during an alarm oP = terminals 1-4 open during an
alarm
CL CL CL
i1P Digital input polarity (18-20)
oP = the digital input is activated by opening the contact CL = the digital
input is activated by closing the contact
CL CL CL
i1F Digital input configuration (18-20) dor = door switch functiondEF = activation of a defrost cycle dor dor dor
i2P 2nd digital input polarity (18-19)
oP = the digital input is activated by opening the contact CL = the digital
input is activated by closing the contact
CL CL CL
i2F
2nd digital input configuration(18-
19)
EAL= external alarm: "EA" message is displayed bAL= serious alarm "CA"
message is displayed PAL= pressure switch alarm, "CA"
 message is displayed
dor = door switch function dEF= activation of a defrost cycle ES = energy
saving AUS = auxiliary relay activation with oA3 = AUS Htr = kind of action
inversion (cooling - heating) FAn = fan HdF = Holiday defrost (enable only
with RTC) onF = to switch the controller OFF
EAL EAL EAL
did
(0 to 255 min) with i2F= EAL or i2F
= bAL digital input alarm delay (18-
20)
Delay between the detection of the external alarm condition and its signaling.
When i2F= PAL: time for pressure switch function: time interval to calculate
the number of the pressure switch activation.
15 15 15
doA Door open signaling delay (0 to 255 min) 15 15 15
nPS Pressure switch number
(0 to 15) Number of activation of the pressure switch, during the did interval,
before signaling the alarm event (i2F = PAL). If the nPS activation in the did
time is reached, switch OFF and ON the device to restart normal regulation.
15 15 15
Odc
Compressor status when open
door
no = normal Fan = fan OFF CPr = compressor OFF F_C = compressor and
fan OFF
F-C F-C F-C
rrd Outputs restart after doA alarm
no = outputs not affected by the doA alarm yES = outputs restart with the
doA alarm
y y y
HES
Temperature increase during the
Energy Saving cycle
(-30.0°C to 30.0°C) Sets the increasing value of the setpoint during the Energy
Saving cycle.
0 0 0
Adr Serial address (1 to 244)
Identifies the device address when connected to a MODBUS compatible
monitoring system.
1 1 1
pbC Type of probe
Allows to set the kind of probe used by the device: Pt1 = Pt1000 probe ntc
= NTC probe
ntc ctc ctc
onF ON/OFF key enabling not used = disabled oFF = enabled ES = not set it
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display - optional
dP4 Fourth probe display
rSE Real setpoint
Shows the setpoint used during the energy saving cycle or during the
continuous cycle.
rEL Software release For internal use only
Ptb Parameter table code Read-only
OTHER PARAMETERS
ALARMS
CONDENSER TEMPERATURE ALARM
AUXILIARY RELAY
DIGITAL INPUTS
Dixell XR75
REGULATION
DEFROST
FANS
AUXILIARY THERMOSTAT CONFIGURATION (terms. 1-4) - oA3 = AUS
Controller Parameters

3-4 startup / opEratIon
P/N 3018126_E U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
P/N 3018126_E 3-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SMG8B & SSG8B
Controller Parameters
XR 75
Code
XR 75 Parameter XR 75 Function
XR 75
Default
SSG SMG
SEt Temperature Setpoint LS to US -5 17 19
Hy Differential
(0.1 to 25.5°C / 1 to 255°F)Intervention differential for setpoint. Compressor
Cut IN is setpoint + differential (Hy).Compressor Cut OUT is when the
temperature reaches the setpoint.
2 9 6
LS Minimum setpoint (-100°C to SEt/-148°F to SEt)Sets the minimum value for the setpoint. -50 10 12
US Maximum setpoint (SEt to 110°C/ SEt to 230°F)Set the maximum value for the setpoint. 110 33 26
ot Thermostat probe calibration
(-12.0 to 12.0°C; -120 to 120°F)Allows to adjust possible offset of the
thermostat probe.
0 0 0
P2P Evaporator probe presence
n = not present: the defrost stops by time y = present: the defrost stops
by temperature
Y n n
oE Evaporator probe calibration
(-12.0 to 12.0°C; -120 to 120°F)Allows to adjust possible offset of the
evaporator probe.
0 0 0
P3P Third probe presence (P3)
n = not present; the terminals 18-20 operate as digital input y = present;
the terminals 18-20 operate as third probe
n n n
o3 Third probe calibration (P3)
(-12.0 to 12.0°C; -120 to 120°F) Allows to adjust possible offset of the third
probe.
0 0 0
P4P Fourth probe presence (n = not present; y = present) n n n
o4 Fourth probe calibration (-12.0 to 12.0°C) Allows to adjust possible offset of the fourth probe. 0 0 0
Ods Outputs activation delay at startup
(0 to 255 min) This function is enabled at the initial start up of the device
and inhibits any output acti-vation for the period of time set in the
parameter.
0 0 0
Ac Anti-short cycle delay
(0 to 50 min) Minimum interval between the compressor stop and the
following restart.
1 2 2
rtr
Percentage of the second andfirst
probe for regulation (0 to100; 100
= P1, 0 = P2 )
Allows to set the regulation according to the percentage of the first and
second probe,as for the following formula (rtr(P1-P2)/100 + P2).
100 100 100
CCt
Compressor ON time during
continuous cycle
(0.0 to 24.0 hr; res. 10 min)Allows to set the length of the continuous cycle:
compressor stays ON without interruption for the CCt time. Can be used, for
instance, when the room is filled with new products.
0 0 0
CCS Setpoint for continuous cycle (-100 to 150°C)Sets the setpoint used during the continuous cycle. -5 17 19
Con
Compressor ON time with faulty
probe
(0 to 255 min)Time during which the compressor is active in case of faulty
thermostat probe. WithCon = 0, compressor is always OFF.
15 6 6
CoF
Compressor OFF time with faulty
probe
(0 to 255 min)Time during which the compressor is OFF in case of faulty
thermostat probe. When CoF= 0, compressor is always active.
30 2 2
CF Temperature measurement unit
°C = Celsius, °F = Fahrenheit, (CAUTION! When the measurement unit is
changed, the setpoint and the values of the parameters Hy, LS, US, ot, ALU
and ALL have to be checked and modified if necessary).
C F F
rES Resolution (for °C) (in = 1°C; dE = 0.1°C) Allows decimal point display. dE dE dE
Lod Device display
(P1; P2, P3, P4, SEt, dtr) Selects which probe is displayed by the device: P1 =
Thermostat probe P2 = Evaporator probe; P3 = Third probe (only for models
with this option enabled), P4 = Fourth probe, SEt= setpoint, dtr =
percentage of visualization
P1 P1 P1
Red X- REP display (optional)
(P1; P2, P3, P4, SEt, dtr) Selects which probe is displayed by the device: P1 =
Thermostat probe P2 = Evaporator probe; P3 = Third probe (only for models
with this option enabled), P4 = Fourth probe, SEt= setpoint, dtr =
percentage of visualization
P1 P1 P1
dLy Display delay
(0 to 20.0 min; resul. 10 seconds) When the temperature increases, the
display is updated of 1°C/1°F after this time.
0 0 0
dtr
Percentage of the second and first
probe for visualization when Lod =
dtr (0 to 100; 100 = P1, 0 = P2 )
If Lod = dtr, it allows to set the visualization according to the percentage of
the first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
50 100 100
EdF
Defrost mode (only for controller
with RTC)
rtC = Real Time Clock mode. Defrost time follows Ld1 to Ld6 parameters on
workdays and Sd1 to Sd6 on holidays. in = interval mode. The defrost starts
when the time Idf is expired.
rtC in in
tdF Defrost type EL = electrical heater in = hot gas EL EL EL
dFP
Probe selection for defrost
termination
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P2 P1 P1
dtE Defrost termination temperature
(-50 to 50°C/ -58 to 122°F) (Enabled only when EdF = Pb) Sets the temperature
measured by the evaporator probe, which causes the end of defrost.
848 48
IdF Interval between defrost cycles
(0 to 120 hr) Determines the time interval between the beginning of two
defrost cycles.
624 24
MdF (Maximum) length for defrost
(0 to 255 min) When P2P = n, (not evaporator probe: timed defrost) it sets
the defrost duration, when P2P = y (defrost end based on temperature) it sets
the maximum length for defrost.
30 90 90
dSd Start defrost delay
(0 to 99 min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
0 0 0
dFd
Temperature displayed during
defrost
(rt = real temperature; it = temperature at defrost start; SEt = setpoint; dEF =
dEF la-bel)
it Def Def
dAd MAX display delay after de-frost
(0 to 255 min)Sets the maximum time between the end of defrost and the
restarting of the real roomtemperature display.
30 30 30
Fdt Drip time
(0 to 120 min)Time interval between reaching defrost termination
temperature and the restoring of thecontrollers normal operation. This time
allows the evaporator to eliminate water drops that might have formed due
to defrost.
0 0 0
dPo First defrost after start-up (y = immediately; n = after the IdF time) n y y
dAF Defrost delay after continuouscycle
(0 to 23.5 hr)Time interval between the end of the fast freezing cycle and the
following defrost relatedto it.
0 0 0
FnC Fans operating mode
C-n = runs with the compressor, OFF during defrost O-n = continuous mode,
OFF during defrost C-y = runs with the compressor, ON during defrost
O-y = continuous mode, ON during defrost
O-n O-y O-y
Fnd Fans delay after defrost (0 to 255 min) Interval between end of defrost and evaporator fans start 10 0 0
FCt
Temperature differential avoiding
short cycles of fans
(0 to 59°C; FCt = 0 function disabled) If the difference in temperature
between the evaporator and the room probes is morethan the value of the
FCt parameter, the fans are switched ON.
10 0 0
FSt Fans stop temperature
(-50 to 50°C/ 122°F) Setting of temperature, detected by the evaporator
probe, above which fans are always OFF.
2 2 2
Fon Fan ON time
(0 to 15 min) With Fnc=C_n or C_y, (fan activated in parallel with
compressor). Sets the evaporator fan ON cycling time when the compressor is
OFF. When Fon=0 and FoF not equal to 0, the fans are always OFF, with
Fon=0 and FoF=0, the fans are always OFF.
0 0 0
FoF Fan OFF time
(0 to 15 min)With Fnc=C_n or C_y, (fan activated in parallel with compressor).
Sets the evaporator fan OFF cycling time when the compressor is OFF. When
Fon=0 and FoF not equal to 0, the fans are always OFF, when Fon=0 and
FoF=0, the fans are always OFF.
0 0 0
FAP
Probe selection for fan
management
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P2 nP nP
ACH
Kind of regulation for auxiliary
relay
Ht = heating CL = cooling CL CL CL
SAA Setpoint for auxiliary relay
(-100 to 150.0°C; -148 to 302°F) Defines the room temperature setpoint to
switch auxiliary relay.
0 0 0
SHy Differential for auxiliary output
(0.1 to 25.5°C/ 1 to 255°F)Intervention differential for auxiliary output
setpoint. When ACH = CL, AUX Cut in is SAA + SHy; AUX Cut out is SAA
When ACH = Ht , AUX Cut in is SAA - SHy; AUX Cut out is SAA
2 2 2
ArP Probe selection for auxiliary
nP = no probe, the auxiliary relay is switched only by the digital input P1 =
Probe 1 (thermostat probe) P2 = Probe 2 (evaporator probe) P3 =
Probe 3 (display probe) P4 = Probe 4
nP nP nP
Sdd Auxiliary relay OFF during defrost
n = the auxiliary relay operates during defrost y = the auxiliary relay is
switched OFF during defrost
n n n
ALP Probe selection for alarm
nP = no probe, the temperature alarms are disabled P1 = Probe 1
(thermostat probe) P2 = Probe 2 (evaporator probe) P3 = Probe 3 (display
probe) P4 = Fourth probe
P1 P1 P1
ALC Temperature alarms configuration
(Ab; rE) Ab = absolute temperature: alarm temperature is given by the ALL or
ALU values. rE= temperature alarms are referred to the setpoint.
Temperature alarm is enabled whenthe temperature exceeds the SEt + ALU or
SEt - ALL values.
Ab Ab Ab
ALU Maximum temperature alarm
(SEt to 150°C; SEt to 302°F)When this temperature is reached, the alarm is
enabled, after the ALd delay time.
110 56 56
ALL Minimum temperature alarm
(-100 to SEt; -148°C to 230°F)When this temperature is reached, the alarm is
enabled, after the ALd delay time.
-50 10 10
AFH
Differential for temperature alarm
recovery
(0.1 to 25.5°C; 1 to 45°F) Intervention differential for recovery of
temperature alarm. It is also used for the restartof the fan when the FSt
temperature is reached.
2 4 4
ALd Temperature alarm delay
(0 to 255 min) Time interval between the detection of an alarm condition
and alarm signaling.
15 30 30
dAo
Exclusion of temperature alarmat
start-up
(from 0.0 min to 23.5 hr)Time interval between the detection of the
temperature alarm condition after devicepower ON and alarm signaling.
1.3 2 2
AP2
Probe selection for temperature
alarm of condenser
nP = no probe P1 = thermostat probe P2 = evaporator probe P3 =
configurable probe P4 = probe on Hot Key plug
P4 nP nP
AL2
Low temperature alarm of
condenser
(-100 to 150°C) When this temperature is reached, the LA2 alarm is signaled,
possibly after the Ad2 delay.
-40 -40 -40
AU2
High temperature alarm of
condenser
(-100 to 150°C)When this temperature is reached, the HA2 alarm is signaled,
possibly after the Ad2 delay.
110 110 110
AH2
Differential for temperature
condenser alarm recovery
(0.1 to 25.5°C; 1 to 45°F) 552 52
Ad2
Condenser temperature alarm
delay
(0 to 255 min)Time interval between the detection of the condenser alarm
condition and alarm signaling.
15 15 15
dA2
Condenser temperature alarm
exclusion at start up
(from 0.0 min to 23.5 hr, res. 10 min) 1.3 1.3 1.3
bLL
Compressor OFF with low
temperature alarm of condenser
n = no: compressor keeps on working Y = yes, compressor is switched OFF
until the alarm is present, in any case regulation restarts after Ac time at
minimum.
n n n
AC2
Compressor OFF with high
temperature alarm of condenser
n = no: compressor keeps on working Y = yes, compressor is switched OFF
until the alarm is present, in any case regulation restarts after Ac time at
minimum.
n n n
tbA
Alarm relay silencing (with
oA3=ALr)
n= silencing disabled: alarm relay stays ON until alarm condition lasts y
=silencing enabled: alarm relay is switched OFF by pressing a key during an
alarm
y y y
oA3 Fourth relay configuration (1-4)
dEF, FAn: do not select it! ALr: alarm; Lig: light; AUS: Auxiliary relay; onF:
alwaysON with device ON; db= neutral zone; cP2 = do not select it!; dEF2: do
not select it!; HES: night blind
Lig Alr Alr
AOP Alarm relay polarity
Set if the alarm relay is open or closed when an alarm happens. CL=
terminals 1-4 closed during an alarm oP = terminals 1-4 open during an
alarm
CL CL CL
i1P Digital input polarity (18-20)
oP = the digital input is activated by opening the contact CL = the digital
input is activated by closing the contact
CL CL CL
i1F Digital input configuration (18-20) dor = door switch functiondEF = activation of a defrost cycle dor dor dor
i2P 2nd digital input polarity (18-19)
oP = the digital input is activated by opening the contact CL = the digital
input is activated by closing the contact
CL CL CL
i2F
2nd digital input configuration(18-
19)
EAL= external alarm: "EA" message is displayed bAL= serious alarm "CA"
message is displayed PAL= pressure switch alarm, "CA"
 message is displayed
dor = door switch function dEF= activation of a defrost cycle ES = energy
saving AUS = auxiliary relay activation with oA3 = AUS Htr = kind of action
inversion (cooling - heating) FAn = fan HdF = Holiday defrost (enable only
with RTC) onF = to switch the controller OFF
EAL EAL EAL
did
(0 to 255 min) with i2F= EAL or i2F
= bAL digital input alarm delay (18-
20)
Delay between the detection of the external alarm condition and its signaling.
When i2F= PAL: time for pressure switch function: time interval to calculate
the number of the pressure switch activation.
15 15 15
doA Door open signaling delay (0 to 255 min) 15 15 15
nPS Pressure switch number
(0 to 15) Number of activation of the pressure switch, during the did interval,
before signaling the alarm event (i2F = PAL). If the nPS activation in the did
time is reached, switch OFF and ON the device to restart normal regulation.
15 15 15
Odc
Compressor status when open
door
no = normal Fan = fan OFF CPr = compressor OFF F_C = compressor and
fan OFF
F-C F-C F-C
rrd Outputs restart after doA alarm
no = outputs not affected by the doA alarm yES = outputs restart with the
doA alarm
y y y
HES
Temperature increase during the
Energy Saving cycle
(-30.0°C to 30.0°C) Sets the increasing value of the setpoint during the Energy
Saving cycle.
0 0 0
Adr Serial address (1 to 244)
Identifies the device address when connected to a MODBUS compatible
monitoring system.
1 1 1
pbC Type of probe
Allows to set the kind of probe used by the device: Pt1 = Pt1000 probe ntc
= NTC probe
ntc ctc ctc
onF ON/OFF key enabling not used = disabled oFF = enabled ES = not set it
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display - optional
dP4 Fourth probe display
rSE Real setpoint
Shows the setpoint used during the energy saving cycle or during the
continuous cycle.
rEL Software release For internal use only
Ptb Parameter table code Read-only
OTHER PARAMETERS
ALARMS
CONDENSER TEMPERATURE ALARM
AUXILIARY RELAY
DIGITAL INPUTS
Dixell XR75
REGULATION
DEFROST
FANS
AUXILIARY THERMOSTAT CONFIGURATION (terms. 1-4) - oA3 = AUS