Hussmann microSC VRL1B User manual

VRL
Low Temperature Self Contained
Glass Door Merchandisers
with R-290 Refrigerant
Installation &
Operation Manual
Spanish 3034045
®
Æ
MANUAL - SELF CONTAINED R290 VRL I/O
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.
FAILURETOABIDE BYTHIS WARNING COULD
RESULT IN AN EXPLOSION, DEATH, INJURYAND
PROPERTY DAMAGE.
IMPORTANT
Keep in store for future reference!
P/N 3034040_H
June 2021

2InstallatIon
P/N 3034040_H 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.
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 (propane) 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 TO ABIDE BY THIS WARNING COULD RESULT INAN EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE.
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

P/N 3034040_H 3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
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
© 2021 Hussmann Corporation
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 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.

4InstallatIon
P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
REVISION HISTORY
REVISION H
Updated the wiring diagrams.
REVISION G
Updated type & clearance, Page 5; Casters, Page 9; Checklist, Page 12; Physical & Electrical Data,
Page 42; Updated condensing unit drawings and wiring diagrams
REVISION F
Added new product warnings, Page 7
REVISION E
Added recovering refrigerant steps
REVISION D
Removed Fan Key Page; Updated parts list and diagrams; added California Warning.
REVISION C
Changed Added VRL 1-door cases
Changed info about door torque.
REVISION B
Changed NEMA Plug - Page 13
ORIGINAL ISSUE — JULY 2017
* * * * * * * * * * * * * * * * * * * * * * * * * *
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.
Do NOT remove shipping crate until the
merchandiser is positioned
for installation.
Excessive ambient conditions may
cause condensation and therefore
sweating of doors. Facility operators
should monitor doors and oor
conditions to ensure safety of persons.
Adjust closing torque by turning the bottom
hinge pin in the direction the door closes.
Use a 1/2 inch (13 mm) wrench, and turn
the hinge pin until the door closes on its own.
Usually it takes two clicks or a half turn.
AT TENTION
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
Case ventilation openings must be clear
of any obstructions. Do not damage the
refrigerant circuit.

P/N 3034040_H 5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
NSF LISTING
These merchandisers are manufactured to meet
ANSI / UL 471 standard requirements for
safety. Proper installation is required to maintain
this listing. Near the serial plate, each case
carries a label identifying the type of conditions
for which the merchandiser was tested.
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
FEDERAL / STATE REGULATION
These merchandisers, at the time they are
manufactured, meet all federal and state /
provincial regulations.
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.
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. VRL units take in air and
exhaust air through the front of the case. A
1-inch clearance space on top, at back or either
side of the case.
Recommended operating ambient
temperature is between
60°F (15.6°C) to 80°F (26.7°C).
Maximum relative humidity is 55%.
INSTALLATION

6InstallatIon
P/N 3034040_H 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,
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.
VRL models have vented base panels to allow
air circulation through the condensing unit.
Allow for a minimum 36 in. clearance in the
front. Blocking or restricting air flow will
adversely affect performance and may damage
the refrigeration system.
36 in.
36 in.
36 in.
Air
Exhaust
Air
Exhaust
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Air Exhaust
Air Exhaust
Air Exhaust
Air Intake
Air Intake
FUk YUOUI
VRL2BVRL2B
36 in.
Air Intake
Front Rear
(Plan View)
Air Exhaust
1-in. Clearance at
Sides and Rear
36 in. Clearance at
Front
36 in. 36 in.
36 in.
Air
Exhaust
Air
Exhaust
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Air Exhaust
Air Exhaust
Air Exhaust
Air Intake
Air Intake
FUk YUOUI
VRL3BVRL3B
Air Exhaust
36 in.
Air Intake
Front Rear
(Plan View)
Air Exhaust
1-in. Clearance at
Sides and Rear
36 in. Clearance at
Front
36 in.
36 in.
36 in.
Air
Exhaust
Air
Exhaust
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Front Rear
Zero Clearance
at Sides and Rear
36 in. Clearance
at Front
(Plan View)
Air Exhaust
Air Exhaust
Air Exhaust
Air Intake
Air Intake
FUk YUOUI
VRL1BVRL1B
36 in.
Air Intake
Front Rear
(Plan View)
Air Exhaust
1 in. Clearance at
Sides and Rear
36 in. Clearance at
Front

P/N 3034040_H 7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
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
damage:
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 the merchandiser or
damage to the merchandisers and serious
personal injury could occur.
merchandisers are not structurally
designed to support excessive 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.
Remove the top of the crate and detach walls
from each other (if applicable). Lift crate from
the skid. Unscrew the case from the skid. The
merchandiser 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 TILT MERCHANDISER ON ITS
SIDE OR END WHEN REMOVING 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 merchandisers are to be set
to if it is a level area. Determine the highest
part of the floor.
Do NOT stand or walk on top of
merchandiser. Do not store items or
ammable materials atop the unit.
Case ventilation openings must be clear of any
obstructions. Do not damage the refrigerant
circuit.
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.

8InstallatIon
P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
MODEL DESCRIPTION
VRL merchandisers are low temperature self-
contained cabinets, designed for pre-packaged
frozen food or products that require frozen
temperatures for conservation.
Design Features:
- Contemporary styling places maximum
attention on merchandising
- All VRL merchandisers have the same access
panel design for commonality between
merchandisers
- Self-closing Innovator doors. Positive seal,
torsion type closure system
- Triple-pane thermal insulated glass door
assemblies
- Magnetic door gaskets of one-piece
construction, removable without tools for
ease of cleaning
- Merchandiser can be placed against wall -
no air gap is required behind the case
- Digital display in center of case air grille
CABINET LEVELING
This merchandiser must be installed level
(from back to front, and side to side) to allow
maximum draining of the condensate water as
well as proper door alignment and operation.
Choose a level area to install case.
VRL2B and VRL3B also have an adjustable
leg leveler at center front and back. Turn the
leg levelers clockwise to add length to each leg
for leveling.
Adjustable
Leg Levelers
Adjustable
Leg Levelers

P/N 3034040_H 9
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
CASTERS
When optional casters are used, screw them
tight to the merchandiser base. Once in final
position, lock each caster. This option is a
ship loose kit. As a standard offering, this
merchandiser is fabricated with hockey puck
style leveler.
FIELD REQUIRED TOOLS
Pry (J) bar to lift up case to remove leg levelers.
Make sure the adjustable wrench used has a
minimum opening of 2 5/16".
83.19"

10 InstallatIon
P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
SHELF INSTALLATION
After the cabinet is leveled, the shelves may
be installed. Wire shelves are adjustable.
Shelf spacing can be adjusted by positioning
the shelf clips according to individual loading
requirements.
VRL merchandisers have four movable wire
shelves and one bottom wire shelf, per door
as a standard option. Extra shelves can be
ordered as optional kits.
LAMPS
This merchandiser has a light switch inside of
the left door frame. The switch controls the
display lighting and interior lighting.
Shelves
Bottom Shelf
Light Switch

P/N 3034040_H 11
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
Load Limit for VRL Merchandisers
STOCKING
Product should NOT be placed in case
until merchandiser is at proper operating
temperature. The VRL merchandisers must
remain in operation for at least 24 hours before
product may be loaded into case cabinet.
Proper rotation of product during stocking
is necessary to prevent product loss. Always
bring the oldest product to the front and set
the newest to the back.
Air exhAust And return grille must remAin
open And free of obstruction At All times.
Do not allow product, packages, signs, etc. to
block air exhaust or return grille. Do not use
non-approved shelving, baskets, display racks,
or any accessory that could hamper air curtain
performance.
donot violAte the loAd limit lines of
vrl cAses, becAuse product will block
the cold Air flow.
LOAD LIMITS
Product must be within designated load limit
to ensure proper refrigeration and air curtain
performance.
54.75"

12 InstallatIon
P/N 3034040_H 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
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.
Step Startup Activity Check
1 Locate, read and maintain install/operation manual in a safe place for
future reference.
2 Examine unit. Conrm 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 eld 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. Ensure
condensate drain tube is properly located against condensate pan.
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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
P/N 3034040_H 13
PLUG
The plug cord is 9ft long and is located on
the right hand rear of the merchandiser.
Disconnect power before servicing. VRL
merchandisers require a dedicated electrical
circuit with ground. 12AWG is the minimum
sized acceptable wire.
• The VRL1B requires a dedicated
15AMP/208-230V circuit with a grounded
wall receptacle (NEMA L6-15P).
• The VRL2B requires a dedicated
15AMP/208-230V circuit with a grounded
wall receptacle (NEMA L6-15P).
• The VRL3B requires a dedicated
20AMP/208-230V circuit with a grounded
wall receptacle (NEMA L6-20P).
• 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.
— LOCK OUT / TAG OUT —
To avoid serious injury or death from electrical
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.
ALWAYS CHECK THE SERIAL PLATE FOR
COMPONENT AMPERES
Risk of Electric Shock. If cord or plug
becomes damaged, replace only with
a cord and plug of the same type.
Merchandiser must be grounded.
Do not remove the power supply cord ground.
ELECTRICAL / REFRIGERATION
Nominal
Voltage
Minimum
Voltage
Maximum
Voltage
208-230 188 253
NEMA L6-15P
VRL1B
VRL2B
NEMA L6-20P
VRL3B

P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
14 ElEctrIcal / rEfrIgEratIon
Before Beginning Any Service or Repair:
Use a hand-held propane leak detector (“sniffer”)
to ensure no propane is present in the immediate
area, the inside of the display case and the inside
of the refrigeration system. R-290 is an odorless
refrigerant. Keep the area clear of all customers
and non-essential or unauthorized personnel.
Verify that all repair parts are identical models
to the ones they are replacing. Do not substitute
parts such as motors, switches, relays, heaters,
compressors, power supplies or solenoids.
Failure to do so can result in an explosion,
death, injury and property damage. Parts
used on hydrocarbon cases must meet specic
UL certication for non-incendive or non-
sparking components. Use only Hussmann
approved parts approved through the Hussmann
Performance Parts Website. https://parts.
hussmann.com/
Brazing must not begin before all propane has
been cleared from the immediate area — the
inside of the displays case and the inside of the
refrigeration system.
Only Hussmann or factory
trained technicians should
service or repair this R-290
(propane) equipment.
Failure to follow
instructions can result in
an explosion, death, injury
and property damage.
If a leak is detected, follow store safety
procedures. It is the store’s responsibility to have
a written safety procedure in place. The safety
procedure must comply with all applicable codes
such as local re department’s codes.
At minimum, the following actions are required:
• Immediately evacuate all persons from the
store, and contact the local re department to
advise them that a propane leak has occurred.
• Call Hussmann and/or a qualied service
agent and inform them that a propane sensor has
detected the presence of propane.
• Do not let any persons back into the store
until the qualied service technician has arrived
and that technician advises that it is safe to
return to the store.
• The propane gas used in the unit has no odor.
The lack of smell does not indicate a lack of
escaped gas.
• A hand-held propane leak detector
(“sniffer”) should be used before any repair and/
or maintenance is attempted. All repair parts
must be identical models to the ones they are
replacing.
• No open flames, cigarettes or other possible
sources of ignition should be used inside the
building where the units are located until the
qualied service technician and/or local re
department determines that all propane has been
cleared from the area and from the refrigeration
systems.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
P/N 3034040_H 15
REPLACING REFRIGERATION SYSTEM
COMPONENTS
STEPS TO RECOVER REFRIGERANT
1. Make sure you are in a well ventilated area be-
fore making any service or repair to the refriger-
ation system.
2. Disconnect all power sources from the system.
Some systems may have more than one plug or
power supply.
3. Tap system with line tap valves, attaching gauges to
the high and low sides of the system.
4. Connect hose to an evacuated recovery tank.
Open refrigeration gauges and recovery tank.
5. With the suction valve in vacuum, the refrigerant will
be recovered into the recovery tank.
6. Once recovered, close the tank valve and remove
the guage from the tank and connect nitrogen tank
to the system to purge it with nitrogen.
7. Pull vacuum to a minimum of 200 microns or
lower.
Only Hussmann service technicians or
technicians qualied to handle R-290
(propane) refrigerant should service or
repair this R-290 (propane) equipment
Failure to follow instructions can result
in an explosion, death, injury and
property damage.
refrigeration
line tapping
valve
For VRL merchandisers with a serial
number starting with MY19C or earlier,
there may be a solenoid valve in place on
the liquid line between the condenser coil
and the lter drier. This is a normally closed
solenoid. When the unit is deenergized,
refrigerant can become trapped between
the compressor and this valve. When
removing the refrigerant from the system,
line tap valves must be placed between the
compressor and this solenoid valve as well
as on the low side of the system.

P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
16 ElEctrIcal / rEfrIgEratIon
CHARGING
A calibrated scale with +/-2 gram accuracy
must be used to charge the system. The charge
amount is shown on the serial plate. Only R-290
grade refrigerant can be used. Standard propane
does not meet the purity/moisture content of
R-290, and therefore cannot be used to charge
cases.
No gas charge adjustments are allowed. When
connecting hoses between the refrigeration
system, manifold gauges, and refrigerant
cylinder, ensure that the connections are secure
and there are no potential sources of ignition
nearby. Ensure that contamination of different
refrigerants does not occur when using charging
equipment.
Use dedicated hoses to service R-290 (propane)
refrigeration systems. Hoses or lines should be
as short as possible to minimize the amount of
refrigerant contained in them.
Ensure that the refrigeration system is properly
grounded prior to charging the system with
refrigerant, to avoid the potential for static
build-up.
Extreme care must be taken not to overll the
refrigeration system. After charging, carefully
disconnect the hoses, attempting to minimize
the quantity of refrigerant released. Further
leak check the service ports, hoses, refrigerant
tanks. The service ports shall be checked for
leaks using a hydrocarbon leak detector with a
sensitivity of 3 grams/year (0.106 Oz/year) leak
rate.
Thoroughly leak check the service ports. If no
leak is present, use a pinch-off tool to close
the ends of the service tubes before brazing
them shut. If a Schrader valve is used on the
compressor service tube, it must be removed and
the previous steps followed in order to braze the
service tube shut.
Component parts shall be replaced with like
components, and servicing shall be done by
factory authorized service personnel only, so
as to minimize the risk of possible ignition
due to incorrect parts or improper service.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
P/N 3034040_H 17
3032520 A
A
DETAIL A
15.00
3.37
SENSOR
AIR DISCHARGE
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRL3B
FIX IN THE WALL
Typical Sensor to Control Conguration
3032520 A
A
DETAIL A
15.00
3.37
SENSOR
AIR DISCHARGE
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRL3B
FIX IN THE WALL
3032520 A
A
DETAIL A
15.00
3.37
SENSOR
AIR DISCHARGE
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRL3B
FIX IN THE WALL
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
SENSOR AIR
DISCHARGE FIX IN THE WALL
15.00
DETAIL A
3.37

P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
18 ElEctrIcal / rEfrIgEratIon
Typical Sensor to Control Conguration
3032520_B
FIX IN THE
SUCTION TUBE
SENSOR
DEFROST
SENSOR
AIR DISCHARGE
FIX IN THE WALL
VRM2B
C
DETAIL C
SCALE 1:2.67
ROOF LINE
3.38
ROOF TO
SENSOR
15.00
EVAP BASE EDGE
P/N 3033490
B
B
B
3.08
ROOF TO BOT
EDGE OF EVAP BASE
B
.30
GAP BTW EDGE
OF BASE AND SENSOR B
VRL2
3032520_B
VRM1B
D
SCALE 1:2.29
3.08
ROOF TO BOT
EDGE OF EVAP BASE
EVAP BASE
EDGE LINE
P/N 3041402
ROOF LINE
12.72
3.38
ROOF TO
SENSOR
.30
GAP BTW EDGE
OF BASE AND SENSOR
SENSOR
AIR DISCHARGE
SENSOR
DEFROST
FIX IN THE WALL
FIX IN THE
SUCTION LINE
VRL1
GDF 3.0 SHEET SIZE D
NOTES:
1. APPLICABLE STANDARDS / SPECIFICATIONS
ASME Y14.5M-1994, DIMENSIONS AND TOLERANCES
2. KEY PRODUCT CHARACTERISTICS PER EPR-0006 & IDENTIFIED WITH SYMBOL
3. REF NONE
K
SHEET 3 OF 4
3032520 B
INSTRUCTION-SENSOR
POSITION
P/N REV
THIRD
ANGLE
PROJECTION
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
FIX IN THE
SUCTION TUBE
SENSOR
DEFROST
SENSOR
AIR DISCHARGE
FIX IN THE WALL
VRL2B/
VRM2B
C
DETAIL C
SCALE 1:2.67
ROOF LINE
3.38
ROOF TO
SENSOR
15.00
EVAP BASE EDGE
P/N 3033490
B
B
B
3.08
ROOF TO BOT
EDGE OF EVAP BASE
B
.30
GAP BTW EDGE
OF BASE AND SENSOR B
GDF 3.0 SHEET SIZE D
NOTES:
1. APPLICABLE STANDARDS / SPECIFICATIONS
ASME Y14.5M-1994, DIMENSIONS AND TOLERANCES
2. KEY PRODUCT CHARACTERISTICS PER EPR-0006 & IDENTIFIED WITH SYMBOL
3. REF NONE
K
SHEET 3 OF 4
3032520 B
INSTRUCTION-SENSOR
POSITION
P/N REV
THIRD
ANGLE
PROJECTION
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
FIX IN THE
SUCTION TUBE
SENSOR
DEFROST
SENSOR
AIR DISCHARGE
FIX IN THE WALL
VRL2B/
VRM2B
C
DETAIL C
SCALE 1:2.67
ROOF LINE
3.38
ROOF TO
SENSOR
15.00
EVAP BASE EDGE
P/N 3033490
B
B
B
3.08
ROOF TO BOT
EDGE OF EVAP BASE
B
.30
GAP BTW EDGE
OF BASE AND SENSOR B

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRL Merchandisers
P/N 3034040_H 19
CONTROLLER
Hussmann Controller Operation RTN
The Controller controls refrigeration temperature.
This is factory installed in the control panel.
Defrosts are time initiated and temperature ter-
minated for self contained. The defrost setting
is factory set as shown above. To ensure a thor-
ough defrost, defrost must be terminated by the
temperature termination setting — not by time.
1. Plug the merchandiser plug into its receptacle.
a. The controller display will illuminate.
b. The interior light will illuminate.
2. After the control preprogrammed time
delay of up to 6 minutes, the compressor and
evaporator fan(s) will start if the control is
calling for cooling.
3. The control will cycle the compressor but
may also cycle evaporator fan(s) on and off
determined by the Set-Point and Differential
temperatures.
a. The Set-Point is the adjustable
preprogrammed temperature.
b. The Differential is the non-adjustable pre
programmed temperature.
c. The Control is designed to read and display
a cabinet temperature not a product
temperature.
This cabinet temperature may reflect the
refrigeration cycle of the Set-Point and it’s
Differential. The most accurate temperature
on a cabinets operation is to verify the product
temperature.
Taking as an example a VRL case, freezer, If the
Set-Point is -12°F and the Differential is 9°F.
(Set-Point) -12°F + 9 (Differential) = -3°F. The
compressor and evaporator fan(s) will cycle off
-12°F and back on at -3°F.
Main Features:
• Panel-mounted
• Energy saving algorithms and optimised
defrost control
• 8 preloaded applications
• Defrost at single / double evaporator
• Frame Heater
• Local network auto-conguration
• Direct load connection (up to 2 HP)
• Supply voltage control LVD
• Presence of an open collector output
Model Product Application Controller Set Point ( ° F ) Defrost Frequency ( per day ) Type of Defrost Temp. Termination Failsafe time ( min )
VRL1 -20 ° F ( - 29 ° C ) 2
VRL2 -14.5 ° F ( -25.8 ° C ) 2
VRL3 -12 ° F ( - 24 ° C ) 2
Electric
48 ° F ( 9 ° C )
50
Frozen Food
3032520_B
FIX IN THE
SUCTION TUBE
SENSOR
DEFROST
SENSOR
AIR DISCHARGE
FIX IN THE WALL
VRM2B
C
DETAIL C
SCALE 1:2.67
ROOF LINE
3.38
ROOF TO
SENSOR
15.00
EVAP BASE EDGE
P/N 3033490
B
B
B
3.08
ROOF TO BOT
EDGE OF EVAP BASE
B
.30
GAP BTW EDGE
OF BASE AND SENSOR B
(Factory Sengs)

P/N 3034040_H U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
20 ElEctrIcal / rEfrIgEratIon
RTN400 Page 17/130
KDEPLUS BUTTONS
The KDEPlus keyboard has 4 keys, as shown in the illustration:
1
2
3
4
Each key has a different function depending on whether it is:
• Pressed and released
• Pressed for at least 5 seconds
• Pressed and held at start-up
• Pressed in combination with another key.
KEYS
The following table summarizes the function of each key:
No Key Action
Pressed and released Press for at least 5 secs Start-up
1• Scrolls through menu items
• Decreases values
Activates the Manual Defrost function
(from outside menus). ---
2• Scrolls through menu items
• Decreases values
Function can be configured by the user
(from outside menus).
(see parameter H32)
---
3
• Returns to the previous menu
level
• Confirms parameter value
Activates the Stand-by function
(from outside menus). ---
4set
• Displays any alarms
(if active)
• Opens Machine Status menu
• Confirms commands
Opens the Programming Menu
(User and Installer parameters)
When pressed during
start-up it enables
the user to select the
application to be loaded.
STANDBY or ESC
DOWN SET
UP
KDEPLUS BUTTONS
The KDEPlus keyboard has 4 keys, as shown in the illustration:
UP
DOWN SET
STANDBY or ESC
Key Functions:
• 2 ON/OFF regulators for HOT/COLD
• Single defrost and double evaporator (heatings,
modulated heaters, reverse cycle, hot gas)
• Evaporator fans and condenser fans
• Frame Heater
• AUX
• Light
• Door switch
• ON /OFF
• Deep cooling cycle
RTN400 Page 7/130
2 - SPECIFICATIONS
TECHNICAL DATA
Classification: electronic automatic control (not safety) device for incorporation
Mounting: panel mounting
Type of action: 1.B
Pollution class: 2
Material class: IIIa
Overvoltage category: II
Nominal pulse voltage: 2500V
Temperature: Use: –5 … +55°C - Storage: -30 … +85°C
Power supply: SMPS 100-240Va ±10% 50/60 Hz
Power consumption: 5.5W max
Fire resistance category: D
Software class: A
RTC battery life: In absence of external power, the clock battery will last 3 years.
FURTHER INFORMATION
INPUT CHARACTERISTICS
Measurement range: NTC: -50.0°C ... +110°C; PTC: -55.0°C ... +150°C; PT1000: -60.0°C ... +150°C
(on 3-digit display with +/- sign)
Accuracy: ±1.0° for temperatures below -30°C
±0.5° for temperatures between -30°C and +25°C
±1.0° for temperatures above +25°C
Resolution: 1 or 0.1°C
Buzzer: NO
Analogue/Digital Inputs: 5 configurable NTC/PTC/PT1000/DI inputs
1 multi-function, voltage-free digital input (D.I.)
OUTPUT CHARACTERISTICS
Digital Outputs: OUT1: 1 SPST relay: 2HP max 240Va
OUT2: 1 SPDT relay: 1HP max 250Va
OUT3: 1 SPDT relay: 8(4)A max 250Va
OUT4: 1 SPST relay: 8(4)A max 250Va
OC (Open Collector) Output: OC: 1 multifunctional output: 12Vc 20mA
MECHANICAL CHARACTERISTICS
Dimensions: 121x92 mm
Terminals: faston and screw for wires with cross-section of 2.5mm2
TTL for Unicard / Device Manager connection (via DMI)
Usage / Storage: 10...90% RH (non-condensing)
Connectors:
Humidity:
REGULATIONS
Electromagnetic compatibility: The device complies with Directive 2004/108/EC
Safety: The device complies with Directive 2006/95/EC
Food Safety: The device complies with standard EN13485 as follows:
• Suitable for storage.
• Application: air.
• Climate range A
• measurement class 1 in the range from -25°C to 15°C (*)
(* with Eliwell probes only)
NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer to
the instrument alone and not to any accessories provided, such as the probes.
This means, for example, that the error introduced by the probe must be added to the error of the instrument.
Reprinted with permission from Eliwell - 2017.
STANDBY or ESC
• Day / Night
• Diagnostics
• “Easy Map” programming
• Programmable inputs/outputs
• LINK2 local area network
• RS485 communication protocol: Modbus
• Compatible with Device Manager (DM)
• Compatible with Unicard and Multi-function key