Hussmann RFLN Installation Manual
®
RFLN & RFMN
Freedom Line
Low or Medium Temperature
Compressor Ready
Narrow Footprint
Reach-in
Merchandisers
IMPORTANT
Keep in store for
future reference!
Manual - Installation & Operation Freedom RFLN & RFMN
Installation &
Operation Manual
Shipped With Case Data Sheets
P/N 0520677_J
July 2015
Spanish P/N 0532420
French P/N 0532421
P/N 0520677_J iii
®
TABLE OF CONTENTS
INSTALLATION
NSF Certication
Freedom Line Description
Location
........................... 1-1
Shipping Damage
Exterior Loading
Merchandisers Shipped with End Installed
Shipping Braces
Moving Merchandisers (Narrow Entrance)
................... 1-1
............ 1-1
.................... 1-2
.................... 1-2
1-2
..................... 1-2
1-3
Final Location ...................... 1-6
Leveling
Door Adjustment
Joining
............................ 1-7
.................... 1-7
............................ 1-8
REFRIGERATION / ELECTRICAL
/ SAFE-NET III
Refrigerant
Field Installation of Condensing Unit
About Quick Connect Couplings
Connect Lines
Insulate Refrigerant Lines
Field Wiring
Safe-NET III Display
Condensate Water and Pump
Safe-NET III User Instructions
Display
Start-Up
Temperature Adjustment
Alarms and Codes
Manual Defrost
Sensor Location
Controls and Adjustments
Merchandiser Electrical Data
Electrical Connections
Identication of Wiring
......................... 2-1
... 2-2
........ 2-3
...................... 2-3
............. 2-4
........................ 2-4
................ 2-4
.......... 2-4
......... 2-6
............................ 2-7
........................... 2-7
............. 2-9
................... 2-9
..................... 2-9
.................... 2-10
............ 2-11
......... 2-12
............... 2-12
.............. 2-12
FACADE AND SPLASHGUARDS
Install Facade ...................... 3-1
Installing Splashguard Brackets
Installing Splashguards
............... 3-4
Sealing Splashguard to Floor
Installing Bumpers
................... 3-6
........ 3-3
.......... 3-5
START UP / OPERATION
Expansion Valve Adjustment .......... 4-1
Prior to Start Up Checklist
Start Up Checklist
Defrost
............................ 4-3
................... 4-2
Checklist After 12 Hour Run Time
Load Limits
Stocking
........................ 4-4
........................... 4-4
............ 4-2
...... 4-3
Installing FDA/NSF
Required Thermometer .............. 4-4
MAINTENANCE
Care and Cleaning ................... 5-1
Cleaning Honeycomb Assemblies
Cleaning Stainless Steel Surfaces
Cleaning Coils
...................... 5-2
Top Mount Cleaning & Maintenance
Cleaning Under Merchandisers
Removing Scratches from Bumper
....... 5-2
....... 5-2
.... 5-3
........ 5-4
...... 5-4
SERVICE
Replacing Fan Motors and Blades ...... 6-1
Replacing Electric Defrost Heaters
Replacing Drain Pan Heater
Servicing Vertical Lighting
Servicing Doors and Frames
Repairing Aluminum Coil
............. 6-4
........... 6-4
............. 6-4
...... 6-2
........... 6-3
OPTIONAL DRIP PIPING
Waste Outlet and Water Seal ........... 7-1
Installing Drip Piping
................ 7-1
WARRANTY
IMPORTANT
KEEP IN STORE FOR FUTURE REFERENCE
Quality that sets industry standards!
12999 St. Charles Rock Road • Bridgeton, MO 63044-2483
®
®
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© 2015 Hussmann Corporation
iv Contents
REVISION HISTORY
REVISION J
Updated “Connect Lines,” Page 2-3
Insulate “Refrigerant Lines,” Page 2-4
“Run Time”, Page 4-3
* * * * * * * * * * * * * * * * * * * * * * * * * *
ANSI Z535.5 DEFINITIONS
• DANGER – Indicate[s] a hazardous
situation which, if not avoided, will
result in death or serious injury.
REVISION H
Excel Note 5.5 inch clearance, Page 1-1.
REVISION G – November 2014
Added California Warning label, Page 1-2
Added Optional Drip Piping, Page 7-1
REVISION F – May 2014
Updated Cover Page; Warning Page 2-1. Added Page 3-5
3-6. New Page 4-2
REVISION E – June 2013
Updated drawings and wording on Page 3-2 and 3-3 to
optional light channel and optional crown molding.
Set pressure contols on Page 4-1 added disconnect hoses
on Page 5-1
REVISION D – March 2013
Section 1: Revised caution box on page 1-2.
Section 2: Added leveling to condensate pan.
Section 5: Added Cleaning Coils.
REVISION C – November 2012
Section 2: Added Safe-NET startup code and optional
audible alarm
• 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.
REVISION B – August 2012
Section 1: Added disassembly / reassembly procedure for
tting cases through smaller doors and
passage ways.
Section 7: Added Emerson Electonic Unit Control
Instructions
REVISION A – October 2011
Original Issue
PN 052677_J
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P/N 0520677_J 1-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
INSTALLATION
NSF CERTIFICATION
These merchandisers are manufactured to
meet ANSI / National Sanitation Foundation
®
(NSF
) Standard #7 requirements. Proper installation is required to maintain certication.
Near the serial plate, each case carries a label
identifying the type of application for which
the case was certied.
ANSI/NSF-7 Type I – Display Refrigerator / Freezer
Intended for 75°F / 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
FREEDOM LINE DESCRIPTION
The Freedom Line RFLN and RFMN cases
are designed to be ready for remote installation
of a top-mounted air-cooled condensing unit,
such as Hussmann’s TCLA through TCMD
series of condensing units. They are controlled
by the Safe-NET III electronic control. The
case temperature is controlled by cycling the
compressor based on the discharge air
temperature input. The sensor for this input is
located above the interior top panel at the right
door. Another sensor, located on the bottom
center evaporator coil return bend, is used for
defrost termination. The Safe-NET III control
is pre-programmed for both ice cream and
frozen food operation, and is adjusted for the
required temperature by the control knob
located on the front of the controller, which is
on the top of the case.
RFLN cases running on individual condensing
units may be installed as stand-alone cases with
ends, or as a part of a lineup. When installed
in a lineup, Hussmann recommends that partitions be installed between individual cases
to prevent frost buildup and other issues that
might result from different defrost schedules
and operating temperatures.
LOCATION
These merchandisers are designed for displaying
products in air conditioned stores where temperature is maintained at or below the ANSI/
NSF-7 specied 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 efciency. Like other merchandisers, these
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 merchandisers.
To prevent sweating on the exterior surfaces
of merchandisers, there must be
clearance of 4 inches (102 mm) between
a minimum
the merchandisers and other xtures or walls.
A 5.5 inch (140 mm) space is required between
facade top and the ceiling. A louvered Facade
Panel kit is available that will allow for a top
spacing minimum clearance of 3 inches (76
mm).
Product should always be maintained at proper
temperature. This means that from the time the
product is received, through storage, preparation
and display, the temperature of the product must
be controlled to maximize the life of the
product. Condensing units installed on top
of the merchandiser require air circulation to
operate properly. Blocking or restricting air
ow will adversely affect performance and may
damage the refrigeration system. If the ceiling
and/or walls are built up around the merchandiser, allow for a sufcient gap above or behind
the merchandiser to provide adequate air circulation. When merchandisers are installed in a
lineup, case must be taken to ensure that warm
condenser air is not blown from one unit into
the condenser of the adjacent unit.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
1-2 InstallatIon
P/N 0520677_J U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM
1-2 InstallatIon
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.
Do not store items or flammable
materials atop the unit.
Do not walk on case.
EXTERIOR LOADING
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. The carrier will supply necessary forms.
Concealed Loss Or Damage
When loss or damage is not apparent until after
equipment is uncrated, a claim for concealed
damage is made. Upon discovering damage,
make request in writing to carrier for inspection
within 15 days and retain all packing. The carrier will supply inspection report and required
claim forms.
For California Businesses:
This product may contain chemicals known
to the State of California to cause cancer,
birth defects, or other reproductive harm.
This warning is the result of the California State
law known as the California Safe Drinking Water
and Toxic Enforcement Act of 1986, which is
commonly referred to as “Proposition 65.”
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 claried by the
California State government, Proposition 65
can be considered more of a ‘right to know’ law
than a pure product safety law. When used as
designed, Hussmann believes that our products
are not harmful. 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.
Do NOT walk on top of merchandisers or damage
to the merchandisers and serious personal injury could occur.
designed To supporT excessive exTernal
loading such as the weight of a person. Do
They are noT sTrucTurally
not store items or ammable materials atop the
case.
MERCHANDISERS SHIPPED WITH END
INSTALLED
If the case was shipped with the end installed,
two long bolts were used to hold the shipping
brace to the end. If the shipping bolts are
reinserted after removing the brace, they will
extend into the product area and may damage
the coil.
Th e s e bolTs w iTh Th e s horTer b o lTs
pr o v ided.
Th e r efore, b e sure T o replac e
Be careful not to damage the factory-installed
end while moving the merchandiser. Make sure
that tools are positioned past the end and beneath the merchandiser’s support bar.
P/N 0520677_J 1-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
SHIPPING BRACES
Move the merchandiser as close as possible
to its permanent location and then remove all
packaging. Check for damage before discarding
packaging. Remove all separately packed
accessories such as kits and shelves.
Locate the shipping block in the center of the
heat exchanger (see illustration), and remove it
before piping the merchandiser. This block was
installed to minimize shipping vibration.
MOVING MERCHANDISER THROUGH
NARROW STORE ENTRANCES
Some exterior merchandiser parts may be
disassembled for transit access through small
doors or passage ways. The minimum door
opening is 36 in. x 83 in. This procedure takes
approximately 30 minutes to disassemble and
reassemble one case. Contact your Hussmann
representative to see if store merchandisers
have this kit option.
2. Remove the front bumper. Pull from the
bottom and set aside.
3. Remove Lower Front Panel
Remove the front panel as follows: remove
screws from front panel tabs, then lift the front
panel. Refer to the illustration below.
Follow the steps below to decrease the
Freedom prole for narrow access:
1. Remove the door handles.
Remove
Screws from
Door Handle
1-4 InstallatIon
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4. Remove the screws that attach the
wireway pan to the bottom assembly.
5. Detach the rubber and plastic gromets
from the wireway pan.
7. Slide the wireway pan out, and remove it
from the case. Bumper brackets and
supports are attached to wireway pan.
Removing the pan will remove the entire
assembly.
8. Remove the back, external braces from the
rear of the case as shown below. Braces will
slide straight back away from the case when
nuts and screws are removed.
6. Remove the screws that attach the
grounding lug to the wireway pan.
6 nuts and 1
bottom screw per
external brace
Bottom screw is located approximately 10
inches inboard from the rear of the case.
Bottom screw location on removed rear
brace.
P/N 0520677_J 1-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
9. Remove the braces and exible insulation
from the hoses at the rear of the case.
NOTE: Care must be taken to ensure that
insulation is not damaged during removal or
replacement.
10. Remove the sealing gum from around the
refrigeration tubing.
11. Pull the hoses to the inside of the case.
Do not suspend these components by their wire
conduits. The case height without these
components installed on top is 82.75 in.
(2102 mm). Case depth is 35.5 in. with handles,
raceway pan and external frames removed.
Be sure to replace all screws and to secure all
components. The condensing unit produces
vibration that can cause screws to loosen.
Check the following before the rear of the
case is positioned at its final location
according to the store plan:
Avoid bending tubing sharply to prevent
damaging the tubes.
A. Check that all wiring is secured inside of
the case and wireway.
B. Check that all hoses are tucked away.
C. Use tie-wraps to secure any loose wires
or hoses.
The electrical box, GFCI receptacle and
evaporation pan are mounted on top of the
case. They can be temporarily detached and
suspended if required to provide clearance for
door openings during shipment and installation.
1. Make sure all electrical and refrigeration is
installed and secured on the back and top
of the case.
2. Ensure refrigeration tubing is attached
sealed and insulated at the rear of the
case as shown.
Secure Flex Hoses When
Detached
1-6 InstallatIon
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3. The external braces must be reinstalled with
(6) nuts per brace, torqued to 24 foot
pounds.
4. Replace and secure condensate tubing.
FINAL LOCATION
Once the case reaches its nal location,
reassemble the wireway and door handles as
follows:
1. Reinstall wireway pan in reverse order of
removal.
2. The ground lug must be reinstalled using the
two screws provided.
3. Replace the conduit connectors and plastic
gromets to the wireway pan.
4. Replace wireway cover, bumper and door
handles.
5. Use Sealing gum around refrigeration to
seal each side of the merchandiser.
At completion of all electrical work,
installation contractor shall re-install the
front panels using care to ensure all panels
are centered and properly fastened.
Use sealing gum around refrigeration
lines both inside and outside
of the merchandiser.
P/N 0520677_J 1-7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
LEVELING
Merchandisers must be installed level to ensure
proper operation of the refrigeration system
and to ensure proper drainage of defrost water.
When leveling merchandisers, use a carpenter’s
level as shown.
Metal leveling shims or wedges are provided
with each merchandiser for use if needed.
NOTE:
po I n t of th e store f l o or.
Be g I n lIneu p levelI n g from t h e hIghes t
Place shims under the rail and make sure that
they are positioned at a base component (crossbar). This transfers the weight directly from the
loaded case through to the oor.
See illustration on next page
Placing shims at other locations will cause
uneven distribution of weight leading to piping
leaks, as well as sagging or wracked doors.
DOOR ADJUSTMENT
After leveling and joining the merchandisers,
adjust and level doors according to manufacturer’s
instructions shipped with each product. Factory
settings may be lost due to vibration during
shipment.
1-8 InstallatIon
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Correct Shim Location is Critical
JOINING
Sectional construction means that two or more
merchandisers may be joined in line yielding
one long continuous display requiring only one
pair of ends. Joining kits and instructions are
shipped with each merchandiser.
To join like xtures, a joining kit is required.
To join unlike xtures, or like xtures operating
at different temperatures, a 1
1
/2inch (38mm)
partition kit is required. To join same temperature merchandisers on different defrost cycles,
a plexiglass partition kit is required.
all joinTs musT be air-TighT To prevenT
formaTion of ice or condensaTion.
P/N 0520677_J 2-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
REFRIGERANT
The correct type of refrigerant will be stamped
on each merchandiser’s serial plate. The serial
plage is located on the left-hand end of the
interior top liner.
When brazing pipes be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to
the plastic case bottom.
Refrigeration lines are under pressure.
Depressurize and recover refrigerant before
attempting any connection or repair.
Refrigerant vapor is hazardous to your health
and can cause death. Avoid breathing refrigerant and lubrication vapor or mist. Exposure
may irritate eyes, nose and throat. If accidental system discharge occurs,ventilate work
area before resuming service.
Always wear safety goggles and protective
gloves when working with refrigerants. Contact
with refrigerant may cause injury. Disconnect
hoses with extreme caution! All hoses may
contain liquid refrigerant under pressure.
Be sure that any room where you are working
is thoroughly ventilated, especially if a leak is
suspected.
Read all safety information regarding the safe
handling of refrigerant and refrigerant oil, including the Material Safety Data Sheet. MSDS
sheets can be obtained from your
refrigerant supplier.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
2-2 RefRigeRation/electRical/Safe-net iii
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REFRIGERATION / ELECTRICAL / SAFE-NET III
FIELD INSTALLATION OF CONDENSING UNIT
A mounting plate is provided on top of the
case with pilot holes that provide specic
attachment points for the condensing unit
base. The mounting plate is located above the
next to last door on the right.
Front of Case
Mounting Plate
After mounting the condensing unit, the
electrical box and GFCI receptacle must be
re-attached to the top. The condensate pan, if
provided, is packed inside the case and must
also be installed and leveled on top of the
case, then plugged into the 120V GFCI outlet
provided. The TCMA, TCMB, and TCLA
units have integral condensate pans, so an
external pan is not required.
Exact component location is not critical;
however, the components should be mounted
in the general locations shown to ensure that
electrical connections reach, and the condensate pan has adequate air ow from the
condenser, and the Safe-NET adjustment
knob is accessible.
Evaporator
Pan
Electrical Box
GFCI Receptacle
Safe-NET
control knob on
this side of electrical box
Front of Case
Condensing Unit
Recommended Component Locations
P/N 0520677_J 2-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
ABOUT QUICK CONNECT COUPLINGS
Quick Connect ttings are provided on
both the case inlet and outlet lines, and on
Hussmann’s TCL and TCM series of condensing units. The case and condensing unit
are pre-charged with the correct amount of
R404A refrigerant, and the lines are sealed.
Connecting the Quick Connects together
breaks the seals to connect the refrigeration lines of the unit to the case. The Quick
Connects must be properly torqued to avoid
refrigerant leaks.
CONNECT LINES
Mount the suction line and liquid line to the
condensing unit. When ready to connect, remove protector caps and plugs from the Quick
Connect couplings.
Tighten a ¼ turn after the coupling bottoms
out to ensure a leak proof seal (equivalent to
the foot pounds shown below).
Coupling Foot Pounds
Size (Ft. Lbs.)
3
/8 in. 10-12
5
/8 in. 35-45
If necessary, carefully wipe coupling seats and
threaded surfaces with a clean cloth to prevent
the inclusion of dirt or any foreign material in
the system.
Lubricate male half of diaphragm and
synthetic rubber seal with refrigerant oil.
Thread the coupling halves together by hand
to ensure proper mating of threads. Use
proper size wrenches (on coupling body hex
and on union nut) and tighten until coupling
bodies “bottom” or a denite resistance is felt.
Hex Wrench
Coupling Size
3
/8 in. Male
3
/8 in. Female
5
/8 in. Male 1 1/16 in.
5
/8 in. Female 1 5/16 in.
3
/4 in.
13
/16 in.
Inlet Quick Connect
Outlet Quick Connect
Inlet Quick Connect
2-4 RefRigeRation/electRical/Safe-net iii
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INSULATE REFRIGERANT LINES
Suction lines are insulated to prevent condensation; extra insulation is provided to
cover the eld connected tubing sections.
These exposed sections must be covered with
insulation. Check that all suction lines are
adequately covered with insulation from case
penetration to compressor; including suction
service valves as some insulation may have
been dislodged during shipping and installation. Do not locate the tubing above the
electrical box in order to prevent condensation
from dripping onto electrical components.
Insulation
The disconnect switch to switch off power
to all case components and the condensing
unit is on top of the case, on the front of the
electrical box. When this switch is off, some
electrical terminals in the case wireway may
be energized. The wiring connection for the
condensing unit is provided with 5-ft leads and
1
⁄4-inch terminals. The conduit must be con-
nected to the condensing unit electrical box,
and the leads are connected to the condensing
unit input terminals. The heated condensate
pan, if provided, is plugged into the 120V
GFCI receptacle at the top of the case.
Safe-NET III DISPLAY
Insert the Safe-NET III display from the front
into the opening provided in the facade.
Compressor
FIELD WIRING
All wiring must be in compliance with NEC
and local codes. Field wiring must be sized for
component amperes stamped on the serial plate.
Actual ampere draw may be less than specied.
Terminal blocks are used for eld connection
of the 120V single phase and 208/230V single
phase power supply. The terminal blocks are
located inside the electrical box on top of the
case. The wiring diagram and circuit requirements are provided on the Technical Data
Sheets provided with the case and condensing
unit.
CONDENSATE WATER AND PUMP
The bottom drain for defrost water from the
evaporator coil of the RLN case is connected
to an evacuation pump which uses
3
/8-inch
plastic drain tubing to pump the water to the
condensate pan on top of the case. The tubing
should be inspected through its entire length
to ensure that it has not been cut, kinked,
obstructed, or damaged during shipping and
installation.
The illustration on the next page shows the
location of the condensate pump and drain.
Blocked drain lines will cause water to back up
in the case and spill onto the floor, causing a
slip hazard.
P/N 0520677_J 2-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
Safe-NET III
Control
GFCI Outlet
Condensate
Evaporator Pan
Condensate Drain
Hose
Electrical Box
2-6 RefRigeRation/electRical/Safe-net iii
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Safe-NET III™
TEMPERATURE AND DEFROST CONTROLLER
SAFE-NET III™ USER INSTRUCTIONS
Your refrigerated case uses a Hussmann
Safe-NET™ III temperature and defrost
controller to precisely maintain the temperature and prevent frost buildup on the cooling
coil. LEDs indicate when the compressor or
• Controller LEDs:
refrigeration is on, when the case is in a defrost
cycle, if the temperature is outside the desired
range, or if there is a sensor failure.
An adjustment knob allows the temperature
to be set within the congured range and can
power off the controller and compressor. Your
controller has been custom-congured to provide the best temperature and defrost control
for your chilled or frozen food.
Compressor Powered On LED (green):
Lights while the compressor is running or
the refrigeration valve is open.
Defrost Cycle LED (yellow):
Lights while the refrigeration coil is defrosting.
Temperature or Sensor Alarm (red):
Lights if the temperature is too warm or
too cold. Flashes if a sensor fails.
The front of the controller has an adjustment
knob and status LEDs. The back of the
controller has connections for sensors and
switched equipment.
The Safe-NET III controller includes the
following features and connections.
• Adjustment knob:
Adjusts the temperature setpoint.
Turn adjustment knob to OFF to turn off
refrigeration system. Unplug merchandiser
from power before servicing the unit.
• Audible Temperature Alarm (optional)
See page 2-8 for alarm settings.
• Rear connections:
– Case temperature sensor:
• Typically senses the temperature
of the air in the case.
Used by the controller to determine when
to power on or power off the compressor
or refrigeration.
– Evaporator temperature sensor:
• Senses the temperature of the
refrigeration coil.
Terminates a defrost cycle when
refrigeration coil ice melts.
– Compressor or refrigeration relay:
• Switches on the compressor or
refrigeration valve for cooling.
The evaporator fans remain ON when the
adjustment knob is in the OFF position.
P/N 0520677_J 2-7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. Freedom Line Reach-in
DISPLAY
The display includes three red LEDs and two
digits for temperature, defrost status, and error
codes.
The three display LEDs are red; their behavior
matches the LEDs on the controller.
START-UP
1. After the toggle switch is turned on, fans and
lights will energize immediately.
The OFF Position does not disconnect line
voltage to the input terminal blocks.
2. After turning on the disconnect switch, wait
for the self check to complete. During the
self check, each LED ashes for one second,
then all LEDs turn on for two seconds. If
the LEDs do not ash, make sure the adjustment knob is not in the Off position.
• After the self check, all LEDs turn off
until the compressor starts. There may be a
delay before the compressor starts. If the red
Temperature or Sensor Alarm LED stays
on after the self check.
• The green Compressor Powered On LED
turns on when the compressor starts.
3. The compressor will continue to run until it
reaches its cut-out temperature (pulldown).
Door and frame anti-sweat heaters will
energize after the evaporator temperature
reaches a stable operating temperature, this
may take 30 minutes or longer.
Product will be degraded and may spoil if
allowed to sit in a non-refrigerated area.
NOTE: Do NOT load product until AFTER
merchandiser operates for 24 hours and reaches
desired operating temperature.
1. The merchandiser temperature displays at
startup. The initial defrost starts twelve hours
later. During defrost, the display shows “df.”
This reading will remain displayed during defrost
and until it times out, even though the refrigeration mode has been initiated. (The green LED
will be lit.)
2. The compressor will start after a 30 second delay
once power is applied.
3. The compressor will continue to run until it
reaches its cut-out temperature (Pulldown).
4. The refrigeration cycle will continue for the next
subsequent scheduled (24-hours) or demand
defrost.
5. The above process will repeat (steps3 and 4)
until the power is interrupted.
6. If power stops, the process will start over at step
1, and the time to subsequent defrost will reset.
7. Medium temperature is the same except for a
60-minute time terminated defrost
2-8 RefRigeRation/electRical/Safe-net iii
P/N 0520677_J
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM
Safe-NET
Safe-NET
Low Temperature Freedom Safe-NET III Settings
Dial
Discharge
air Cut-In
Discharge
air Cut-Out
Avg Discharge Air
Temperature
Product Temperature
Range
0 Off
1 0 -6 -2 -5 to 10
4 -8 -14 -6 -11 to 5
7 -17 -23 -14 -18 to 0
Medium Temperature Freedom Safe-NET III Settings
Dial
Discharge
air Cut-In
Discharge
air Cut-Out
Avg Discharge
air Temperature
Product Temperature
Range
0 Off
1 38 32 36 32 to 42
4 35 29 33 29 to 39
7 33 27 31 27 to 37
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