Hussmann VRM1B User manual

VRM
Medium Temperature Self Contained
Glass Door Merchandisers
with R290 Refrigerant
Installation &
Operation Manual
Spanish 3034047
French 3034046
®
Æ
MANUAL - SELF CONTAINED R290 VRM 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 (propane) gas as the refrigerant.
R-290 (propane) 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 3034041_D
October 2018

2InstallatIon
P/N 3034041_D 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.
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
1. If the information in these instructions are not followed exactly, a fire or explosion may result, causing property damage, personal
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 (propane) 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 TOABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE.

P/N 3034041_D 3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM 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
© 2018 Hussmann Corporation
Merchandiser must operate for 24 hours
before loading product!
Regularly check merchandiser temperatures.
Do not break the cold chain. Keep products
in cooler before loading into merchandiser.
These merchandisers are designed
for only pre-chilled products.
AT TENTION

4InstallatIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
REVISION HISTORY
REVISION D
Removed Fan Key Page; Updated parts list and diagrams; added
California Warning.
REVISION C
Updated part numbers and wiring diagrams.
REVISION B
Added VRM 1-door cases
Changed info about door torque.
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

P/N 3034041_D 5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM 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 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
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. VRM units in take air and
exhaust air through the front of the case, and
require no clearance space on top, at back or
either side.
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 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
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
VRM3B
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.
VRM 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
VRM2B
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
VRM1B
36 in.
Air Intake
Front Rear
(Plan View)
Air Exhaust
1 in. Clearance at
Sides and Rear
36 in. Clearance at
Front

P/N 3034041_D 7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM 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.
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

8InstallatIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
MODEL DESCRIPTION
VRM merchandisers are medium temperature
self-contained cabinets, designed for the
display of dairy products, deli items and
beverages.
Design Features
- Contemporary styling places maximum
attention on merchandising
- All VRM 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 grill
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.
VRM2B and VRM3B also have an adjustable
foot at center front and back. Turn the foot
levelers clockwise to add length to each foot
for leveling.
When optional casters are used, screw them
tight to the merchandiser base. Once in final
position, lock each caster.
Adjustable
Foot
Adjustable
Foot

P/N 3034041_D 9
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
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.
VRM merchandisers have four movable wire
shelves and one bottom wire shelf, per door.
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

10 InstallatIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
STOCKING
Product should NOT be placed in case
until merchandiser is at proper operating
temperature. VRM 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 stock product in the top four
inches of Vrm 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.
Load Limit for VRM Merchandisers
noproduct
within
4 inches
of top
At no time should product be stocked:
• Beyond the front and rear of the shelves
• Near the air supply duct located at the top rear of case
• Near or covering the evaporation fan grilles
• Within four inches of the top of the cabinet (This space must be free of product and other materials.)
DO NOT LOAD CASE WITH WARM PRODUCT.

P/N 3034041_D 11
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
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.
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.

12 InstallatIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
NOTES:

P/N 3034041_D 13
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
PLUG
The plug cord is 9 ft long and is located on
the right hand rear of the merchandiser.
Disconnect power before servicing. VRM
merchandisers require a dedicated electrical
circuit with ground. 12AWG is the minimum
sized acceptable wire.
• The VRM models require a dedicated
15AMP/115V circuit with a grounded wall
receptacle (NEMA 5-15R).
• 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.
VRL-1 VRL-2 VRMB
5-15P
P
6
P
5- P
— 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
All Models
Nominal
Voltage
Minimum
Voltage
Maximum
Voltage
120 108 132

14 ElEctrIcal / rEfrIgEratIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
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.

P/N 3034041_D 15
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
REPLACING REFRIGERATION SYSTEM
COMPONENTS
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.
Only Hussmann service technicians or
technicians qualified 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.
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.

16 ElEctrIcal / rEfrIgEratIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
3032520
SENSOR
AIR DISCHARGE
FIX IN THE WALL
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRM3B
B
DETAIL B
SCALE 1:4
3.08
ROOF TO BOT
EDGE OF EVAP BASE
EVAP BASE EDGE
P/N 3033936
3.38
ROOF TO
SENSOR
.30
GAP BTW EDGE
OF BASE AND SENSOR
ROOF LINE
15.00
B
B
B
B
B
Typical Sensor to Control Conguration
3032520
SENSOR
AIR DISCHARGE
FIX IN THE WALL
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRM3B
B
DETAIL B
SCALE 1:4
3.08
ROOF TO BOT
EDGE OF EVAP BASE
EVAP BASE EDGE
P/N 3033936
3.38
ROOF TO
SENSOR
.30
GAP BTW EDGE
OF BASE AND SENSOR
ROOF LINE
15.00
B
B
B
B
B
3032520
SENSOR
AIR DISCHARGE
FIX IN THE WALL
SENSOR
DEFROST
FIX IN THE
SUCTION TUBE
VRM3B
B
DETAIL B
SCALE 1:4
3.08
ROOF TO BOT
EDGE OF EVAP BASE
EVAP BASE EDGE
P/N 3033936
3.38
ROOF TO
SENSOR
.30
GAP BTW EDGE
OF BASE AND SENSOR
ROOF LINE
15.00
B
B
B
B
B

P/N 3034041_D 17
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
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
VRM2B
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
VRM1B
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

18 ElEctrIcal / rEfrIgEratIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
CONTROLLER
Hussmann Controller Operation RTN
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
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

P/N 3034041_D 19
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. VRM Merchandisers
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
• 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
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.

20 ElEctrIcal / rEfrIgEratIon
P/N 3034041_D U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
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.