Hussmann SM-110 User manual

R
S
N / SM SERIES
Spot
Low Temperature
Merchandisers
PLEASE READ THIS MANUAL BEFORE USING THE PRODUCT
Installation &
Operation
Manua
l
P/N 2400205 C
March, 2004
HUSSMANN – CORPORATION
Hussmann Monterrey, Mexico
Carretera Mexico-Laredo KM. 1009
Cienega de Flores, Nuevo Leon 65550
MEXICO
Phone: [phone]
Fax: [phone]
SN-07
5
SN-09
0
SN-11
5
SN-14
0
SN-19
0
SM-075
SM-090
SM-115
SM-140
SM011
0

Table of Contents
SHIPPING DAMAGE
General 1-1
Apparent Loss or Damage 1-1
Concealed Loss or Damage 1-1
Location 1-1
PREPARATION OF CABINET FOR
OPERATION
Removing Cabinet from Skid 2-1
Door installation (SN Models) 2-1
Operation 2-1
Load Limit 2-1
REFRIGERATION SYSTEM
Description 3-1
Defrosting Instructions 3-1
START UP / OPERATION
Electrical Supply 4-1
Temperature Control 4-1
High Pressure Switch 4-1
Draining
MAINTENANCE
Maintenance 5-1
Cabinet Surfaces 5-1
Cond
enser
5
-
1
R
P/N 2400205 C
1-1

General
A
ll equipment should be thoroughly
examined for shipping damage before
and during unloading.
This equipment has been carefully
inspected at our factory and the carrie
r
has assumed responsibility for safe
arrival. If damaged, either apparent o
r
concealed, claim must be made to the
carrier.
Apparent Loss Or Damage
If there is an obvious loss or damage, it
must be noted on the freight bill o
r
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 fo
r
inspection within 15 days and retain all
packing. The carrier will supply
inspection report and required claim
forms.
R
SHIPPING DAMAGE
Location
The SN Models (with glass tops) are
designed for indoor operation with a
recommended operating room maximum
ambient temperature range of 65 to 90°F
(18-32°C)/50-65% rh. The SM models
(open tops) are designed for indoo
r
operation with a recommended operating
room maximum ambient temperature o
f
75° F (24°C)/55% rh. Their performance is
affected by store air currents when the
doors are open. Do NOT allow ai
r
conditioning, electric fans, or open doors
and windows to create air currents around
these Spot Merchandisers nor should they
be exposed to direct sunlight or other heat
sources.
NOTE: The condensing unit draws
ambient air through one side of the unit
and discharges hot air out by the opposite
side. In order to maintain prope
r
refrigeration performance and compresso
r
life, a minimum space of 4" (10 cm) must
be maintained between the refrigerato
r
and surrounding surfaces.
P/N 2400205 C
2-1

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PREPARATION OF CABINET FOR OPERATION
Removing Cabinet From Skid
Move the Spot Merchandiser as close
as possible to its permanent location
and remove hold-down brackets at the
front and rear of the cabinet. Chec
k
refrigeration lines to see that they are
“free” and no damage has occurred
during shipping . Check fan blades fo
r
free operation.
Door Installation ( SN Models)
After the merchandiser has been placed
at its final position, the doors may be
installed. The doors must be positioned
inside of each guide to have a good
seal.
Operation
A
lways allow the cabinet to warm up to
65° F before starting the unit. If the
cabinet has just been delivered from a
cold ambient, such as winter, wait least
16 hours before starting.
Should the unit be disconnected when
running, wait 5 minutes before restarting.
This allows the refrigerant pressures to
equalize and prevents the compresso
r
from cycling on its overload protector.
It is advisable to run the unit for 30 to 60
minutes before loading with merchandise.
This is to allow the air inside the Spot
Merchandiser to cool down.
Load Limits
Each merchandiser has a load limit decal.
A
t no time should merchandiser be
stocked beyond the load limits indicated.
If load limit is violated, it may result in
loss of contents.
P/N 2400205 C
3-1

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REFRIGERATION SYSTEM
Description
A
ll Merchandisers are equipped with a
hermetic compressor. The refrigeration
system works with 404a refrigerant. It is
really important not to change or mi
x
refrigerants during service. If anothe
r
refrigerant than the specified is used,
the performance of the case will be
affected.
The refrigerant used is CFC free. That
means it does not damage the
stratosphere ozone layer.
The condenser is fin and tube
construction. The air is taken in at one
side of the cabinet through the lowe
r
grill and discharged out by the opposite
side.
Cooling is accomplished by the ambient
created by the cold walls.
Defrosting Instructions
When defrosting is necessary, remove
product, remove drain plug, disconnect
electricity and allow frost to melt.
Do not remove frost with a pick, knife o
r
by scraping with a sharp object.
Collect the water from defrost in a pan.
DO NOT allow the water to drain on to
the floor.
When the unit is finished defrosting,
clean the inside as described in section
4.1, install the plug on the drain tube and
connect the unit to the correct powe
r
supply.
Thermostat & Warning
Light

R
P/N 2400205 C
4-1
START UP / OPERATION
Electrical Supply
Wiring of the unit is complete when it is
shipped from the factory. The unit is
supplied with a three conducto
r
electrical cord which extends from a
side of the unit. Plug the unit into
correct grounded outlet. It is
recommended that a separate circuit be
run for each cabinet to prevent the
possibility of another appliance blowing
a fuse, causing subsequent loss o
f
product.
Temperature Control
A
n adjustable thermostat is provided fo
r
either medium or low temperature
operation. The thermostat is easily
reached by removing the plastic cove
r
located on the base.
For low temperature operation, turn the
screw on the thermostat clockwise. In
the full clockwise position, the
compressor will run 100% of the time.
For medium temperature, set control
screw midway between full clockwise
and full counter clockwise.
The flow of room air over the top of the
Spot Merchandiser should be minimized
for best refrigerating results. Avoid
placing your Spot Merchandiser in the
direct rays of the sun or in the ai
r
stream from electric fans or open
doorways.
High Pressure Switch
A
high pressure limit switch is provided
on all Spot Merchandiser Models. This
switch is used to limit the discharge
pressure of the compressor.
This switch will automatically cycle off the
compressor and turn on a warning light
on the base, when the discharge
pressure in the system is too high.
If this condition occurs, first clean the
condenser. If the warning light continues
to illuminate, call service.
This pressure switch is a safety device
and will not function during normal case