Hussmann FNGSC-A User manual

Installation &
Operation Manual
P/N 3141959_C
December 2021
Spanish 3141958
MANUAL- I/O SELF-CONTAINED FNGSC-A
WARNINGS:
If the information in these instructions are not followed
exactly, a fire or explosion may result, causing property
damage, personal injury or death.
Installation and service must be performed by a qualified
installer or service agency.
READ THE ENTIRE MANUAL BEFORE
INSTALLING OR USING THIS EQUIPMENT.
The unit uses R-290 gas as the refrigerant. R-290 is
flammable and heavier than air. It collects first in low
areas but can be circulated by the fans. If propane gas
is present or even suspected, do not allow untrained
personnel to attempt to find the cause. The propane
gas used in the unit has no odor. The lack of smell does
not indicate a lack of escaped gas. If a leak is detected,
immediately evacuate all persons from the store, and
contact the local fire department to advise them that
a propane leak has occurred. Do not let any persons
back into the store until the qualified service technician
has arrived and that technician advises that it is safe to
return to the store. No open flames, cigarettes or other
possible sources of ignition should be used inside or in
the vicinity of the units.
FAILURE TOABIDE BY THIS WARNING COULD
RESULT IN AN EXPLOSION, DEATH, INJURYAND
PROPERTY DAMAGE.
IMPORTANT
Keep in store for future reference!
FNGSC-A
Dual Temperature Self Contained
Island Merchandiser
with R-290 Refrigerant

ii
P/N 3141959_C U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
BEFORE YOU BEGIN
Read these instructions completely and carefully.
PERSONAL PROTECTION EQUIPMENT (PPE)
Personal Protection Equipment (PPE) is required whenever installing or servicing this
equipment. Always wear safety glasses, gloves, protective boots or shoes, long pants, and
a long-sleeve shirt as required when installing or servicing this equipment.
1. If the information in these instructions are not followed exactly, a fire or explosion may result, causing property damage, person-
al injury or death.
2. Installation and service must be performed by a qualified installer or service agency.
3. This unit is designed only for use with R-290 gas as the designated refrigerant.
THE REFRIGERANT LOOP IS SEALED. ONLY A QUALIFIED TECHNICIAN SHOULD ATTEMPT TO SERVICE!
• Propane is flammable and heavier than air.
• It collects first in the low areas but can be circulated by the fans.
• If R-290 is present or even suspected, do not allow untrained personnel to attempt to find the cause.
• The propane gas used in the unit has no odor.
• The lack of smell does not indicate a lack of escaped gas.
• If a leak is detected, immediately evacuate all persons from the store, and contact the local fire department to advise them that a
pro pane leak has occurred.
• Do not let any persons back into the store until the qualified service technician has arrived and that technician advises that it is
safe to return to the store.
• A hand-held propane leak detector (“sniffer”) shall be used before any repair and/or maintenance.
• No open flames, cigarettes or other possible sources of ignition should be used inside the building where the units are located
until the qualified service technician and/or local fire department determines that all propane has been cleared from the area and
from the refrigeration systems.
• Component parts are designed for propane and non-incendive and non-sparking. Component parts shall only be replaced with
identical repair parts.
FAILURE TOABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION, DEATH, INJURYAND PROPERTY DAMAGE.

P/N 3141959_C iii
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. FNGSC-A Self Contained Merchandisers
Merchandiser must operate for 24 hours
before loading product!
Regularly check merchandiser temperatures.
Do not break the cold chain. Keep products
in freezer before loading into merchandiser.
These merchandisers are designed
for only pre-frozen products.
AT TENTION
Merchandiser must operate for 24 hours
before loading product!
Regularly check case temperatures. Do not break
the cold chain. Keep products in cooler or freezer
before loading into merchandiser.
These merchandisers are designed to operate at
dual temperatures. Only load pre-chilled products in
medium temperature settings.
Only load pre-frozen products in low temperature
settings.

iv
P/N 3141959_C U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
TABLE OF CONTENTS
ANSI Z535.5 DEFINITIONS ...........v
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
Model Description .................. 1-2
Unloading ......................... 1-2
Shipping Skid ...................... 1-3
Merchandiser Leveling ............... 1-3
Serial Plate Location ................. 1-4
Refrigeration Unit Access ............. 1-4
Sealing Merchandiser to Floor ......... 1-4
Self-Contained Refrigeration Equipment
Start Up Check List ................ 1-5
ELECTRICAL / REFRIGERATION
Merchandiser Electrical Data .......... 2-1
Field Wiring ........................ 2-1
Electrical Connections . . . . . . . . . . . . . . . . 2-1
Electrical Outlet ..................... 2-1
Refrigeration ....................... 2-1
Refrigeration System Functionality ..... 2-2
Refrigeration System Layout........... 2-6
Replacing Refrigeration System
Components ...................... 2-8
Steps to Recover Refrigerant .......... 2-8
Charging .......................... 2-9
Evaporation Pans .................. 2-10
Installing Drip Piping ............... 2-11
Drip Piping Lineup Arrangements ..... 2-12
START UP / OPERATION
Changing Between Medium &
Low Temperature Applications ....... 3-1
Controller Operation ................. 3-3
LED .............................. 3-4
KDEPLUS Buttons .................. 3-5
Setpoint: Setting and Edit Lock ........ 3-6
Display Probes Value ................. 3-6
Key-Activated Functions .............. 3-6
Typical Sensor Location .............. 3-7
Controls and Adjustments ........... 3-10
Load Limits ....................... 3-11
Stocking .......................... 3-11
Installing FDA/NSF Required
Thermometer ..................... 3-12
MAINTENANCE
Care and Cleaning ................... 4-1
Removing Scratches from Bumper ...... 4-2
Cleaning Under Fan Plenum .......... 4-2
Cleaning Discharge Air Honeycomb .... 4-2
Cleaning Stainless Steel Surfaces ....... 4-3
Cleaning Coils ...................... 4-3
Cleaning Evaporation Pan ............ 4-4
Self-Contained Refrigeration Equipment
Maintenance Check List ............. 4-5
SERVICE
Replacing Evaporator Motors ......... 5-1
Replacing Inverter ................... 5-2
Replacing Condenser Motor ........... 5-3
Replacing Compressor ............... 5-4
Replacing Drain Heater .............. 5-5
Replacing Pan Heater ................ 5-6
Replacing Solenoid Valves ............ 5-7
Inverter Board Diagnostics ............ 5-8
Troubleshooting Guide .............. 5-11
WARRANTY

P/N 3141959_C v
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. FNGSC-A Self Contained Merchandisers
REVISION HISTORY
REVISION B
Updated evaporation Pans, Page 2-8; Updated
Controller Start up Section, Page 3-6 to page 3-1;
updated parameters and control adjustments, Page 3-8
ORIGINAL ISSUE — 2021
Excessive ambient conditions may cause conden-
sation and therefore sweating of doors. Facility oper-
ators should monitor doors and floor conditions to
ensure safety of persons.
All installation and operating instructions con-
cerning the handling, moving, and use of these
merchandisers must be carefully followed to avoid
either damaging the refrigerant tubing, or increas-
ing the risk of a leak.
Case ventilation openings must be clear of any
obstructions. Do not damage the refrigerant circuit.
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 fans, heaters, thermostats
and lights.
Do not use mechanical devices or other means to
accelerate the defrosting process.
Do not use electrical appliances inside the food
storage compartments of the 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
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.
The safety of our customers and employees is paramount.
The precautions and procedures described in this manual
are intended as general methods for safe use of
this equipment. Please be sure to comply with the
precautions described in this manual to protect you
and others from possible harm, and follow OSHA
standards for safety.
The definitions at right are used to clarify the
magnitude and urgency of harm and damage,
considering problems arising from misuse. Relative
to their potential danger, the definitions are
divided into four parts according to
ANSI Z535 Series.

P/N 3141959_C 1-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. FNGSC-A Self Contained Merchandisers
UL LISTING
These merchandisers are manufactured to
meet ANSI/ UL 471 standard requirements
for safety. Proper installation is required to
maintain the listing.
FEDERAL / STATE REGULATION
These merchandisers at the time they are
manufactured, 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.
ANSI/NSF-7 Type I – Display Refrigerator / Freezer
Intended for 75°F (24°C) / 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
correct 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. Do not under any
circumstances connect a damaged cabinet to
the electric circuit. Otherwise, there is the risk
of electric shock or refrigerant leakage!
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 (24°C).
Maximum relative humidity is 55%.

1-2 INSTALLATION
P/N 3141959_C U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
LOCATION
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.
BESURE TO POSITION SELF CONTAINED
MERCHANDISERS PROPERLY.
These models have vented base panels to allow
air circulation through the condensing unit.
Allow for a minimum 30"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 refrigeration system.
MODEL DESCRIPTION
FNGSC models are island, spot display
merchandisers. Each self contained model will
have two self-contained units with one dual
circuited evaporator.
FNGSC models are designed for dual
temperature operation. These models
have upper glass on all four sides of the
merchandiser.
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. Remove all separately
packed accessories. Improper handling may
cause damage to the merchandiser when
unloading.
To avoid damage:
1. Do not drag the merchandiser out of the
trailer. Use a Johnson bar (mule). Use a
forklift or dolly to remove the merchandiser
from the trailer.
2. Use caution when moving case to
setup location. Use care to not damage
refrigeration system. Confirm there are
no refrigerant leaks during startup of the
case(s).
AIR
INTAKE
AIR
EXHAUST
4 IN
CLEARANCE
30" Clearance

P/N 3141959_C 1-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. FNGSC-A Self Contained Merchandisers
SHIPPING SKID
Each merchandiser is shipped on a skid to
protect the merchandiser’s base, and to make
positioning the case easier.
Remove the top of the crate and detach walls
from each other (if provided). Lift crate from
the skid. 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 (blanket wrapped merchandiser
may have skids).
DO NOT LAY MERCHANDISER OVER
ON THE FLOOR TO REMOVE SKID.
Once the skid is removed, the merchandiser
must be lifted —NOT PUSHED— to reposition.
To remove the skid, remove screws attaching
skid to the merchandiser.
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.
Do NOT remove shipping skid until
the merchandiser is positioned for
installation.
Remove #7 x 2” Philips screws
from merchandiser base

1-4 INSTALLATION
P/N 3141959_C 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 inside of the
merchandiser’s display area.
REFRIGERATION UNIT ACCESS
The lower front panel may be removed by
lifting the panel straight upward and over the
tabs on which it is hanging. For self contained
cases, two screws will have to be removed from
either end of the panel. Make sure all electrical
wiring is secured, and that there is no damage
to the unit from shipment or placement.
Confirm there are no refrigerant leaks during
startup of the case(s). The panel is installed
by reversing the above procedure. Ensure
merchandiser base is properly installed on case
to prevent air circulation problems.
SEALING MERCHANDISER TO FLOOR
If required by local sanitary codes, or if the
customer desires, merchandisers may be sealed
to the floor. Make sure lower front and rear
panels are still able to be removed to service the
condensing unit when sealing around the case.
NOTE: Do not allow trim to cover any intake
or discharge grilles located in the lower front
panel. When the merchandiser is equipped
with levelers, sealing to the floor may not be
required. Merchandiser may be relocated to
another location so that floor can be cleaned.
REMOVE CENTRAL AND SIDE SCREWSCondensing Unit
Condensing Unit
Electrical Box
Both Sides
Fan
Fan
Condensing Unit
Electrical Box
both sides
Condensing Unit
Serial Plate
Remove Central
and Side Screws
(FNGSC8A) Shown