Hussmann EVM Quick guide

January 2006
HUSSMANN - GLOVERSVILLE
INSTALLATION & SERVICE
INSTRUCTIONS
FOR
EVM MEDIUM TEMPERATURE MERCHANDISER
FOR
Diary, prepared salads, pizzas, and fresh entrees
P/N OII – EVM
January 2006
First Call for help (US and Canada):
1-800-922-1919
Soporte Tècnico y Asistencia (Mèxico):
01-800-522-1900
For a Service Network Locator and other
Information visit us at
www.hussmann.com
select Worldwide Locations

PAGE 2
TABLE OF CONTENTS
PAGE
INTRODUCTION, INSPECTION, LOCATION and CLEARANCE 2
SKID, LEVELING and SEALING 2
DRAINS 2
SERIALPLATE 3
AIR DISTRIBUTION and PRODUCT LOADING 3
POWER REQUIREMENTS 3
ELECTRICAL BOX, POWER SWITCH, TIME CLOCK 4
CONNECTIONS 4
SPECIFICATIONS, DIMENSIONS, BTU CAPACITY 4
SHELVING, TEMPERATURE CONTROL, CONDENSING UNIT 5 – 6
THERMOMETER 6
LIGHTING, LAMP SWITCH, BALLAST 6 – 7
NIGHT COVER, CLEANING EXTERIOR 7
CLEANING INTERIOR, REFRIGERATION 7
LEAK TESTING AND EVACUATION 7 – 8
TROUBLE SHOOTING CHARTS 9 – 10
LIGHTING TROUBLESHOOTING 10
WARRANTY, PARTS / COMPRESSOR REPLACEMENT 11 – 12

PAGE 3
INTRODUCTION, INSPECTION, LOCATION and CLEARANCE
SKID, LEVELING and SEALING and DRAINS
Hussmann EVM model cabinets offer
maximum versatility in the display of medium
temperature prechilled products such as pre-
pared salads, pizzas, fresh entrees, and dairy
products.
INSPECTION –
Upon receipt of the cabinet, carefully in-
spect the crating and equipment for damage. If
damage is found, note on the delivery receipt
where and how extensive the damage before
signing.
After removal of the crating, again in-
spect the cabinet for damage. If damage is
found, contact the delivering carrier and request
for an inspection and inspection report be made
for the purpose of filing a claim. Save as much
as the crating as possible and move the cabinet
as little as possible until after the inspection.
THIS IS YOUR RESPONSIBILITY
LOCATION and CLEARANCE –
It is very important that careful consid-
eration be given to the cabinet location in the
store. Areas where direct sunlight would shine
into the cabinet, and locations where drafts from
air conditioning, open doors, and fans would
blow directly into the cabinet should be avoided.
The EVM cabinets have front air intake
and rear air discharge for proper air flow over
the condensing unit. A minimum distance of two
feet must be left open in front of the cabinet so
that air intake to the condensing unit is not ob-
structed.
In addition, a minimum of five inches clearance
behind the case and eighteen inches above the
case is required to allow for proper discharge of
air flowing over the condensing unit.
SKID –
The shipping skid should be left on the
cabinet until it is near its selected location in the
store. The skid provides protection for both the
cabinet and floor. The skid can be removed by
backing out the screws that are run through the
front and rear base rails into the skid. Once
these screws are removed, the cabinet may be
slid carefully off the skid.
LEVELING –
The cabinet must be properly leveled to
ensure full drainage of the water produced dur-
ing the off and defrost cycles. Level the cabinet
from front to rear and end to end.
SEALING –
Once the cabinet has been installed and
properly leveled, it should be sealed to the floor
as shown in the following drawing, utilizing a
NSF approved material such as General Electric
RTV-102 silicone sealant or equivalent.
DRAINS –
Remote draining is not required on self-
contained models. The condensate water from
the evaporator drains out through the bottom of
the cabinet, through a copper trap attached to
the underside of the condensing unit area, into
an electrically heated condensate pan. Until

PAGE 4
the trap gets filled with water, there may be a
small frost accumulation in the evaporator coil
area. This frost should disappear after the trap
gets filled with water, usually after the first de-
frost. The drains for the condensate water are
located in the front corners of the evaporator
coil area. These drains must be kept clear to en-
sure proper drainage of the condensate water.
SERIAL PLATE –
The serial plate is located on the interior
left hand end. It contains all pertinent informa-
tion such as model, cabinet serial number, re-
frigerant type and amount etc. The information
on this plate is very helpful when servicing or
ordering replacement parts. This plate should
never be altered or removed for any reason.
AIR DISTRIBUTION and PRODUCT
LOADING–
This cabinet has a forced-air circulation
system. Air flows through the perforations in
the back wall over the product on the shelves, as
well as out the baffles located above the product,
across the face of the product and into the re-
turn air grill.
WHEN LOADING THE PROD-
UCT DO NOT PLACE IT SO
THAT IT EXTENDS OVER THE
SHELF EDGES OR OVER THE
RETURN AIR GRILL. IT IS
ALSO IMPORTANT NOT TO
PLACE THE PRODUCT TIGHT
AGAINST THE BACK PANEL.
THIS WILL RESTRICT AIR
FROM FLOWING OUT OF THE
PERFORATIONS AND OVER
THE PRODUCT.
POWER REQUIREMENTS –
The EVM3977 comes equipped with a
15A power cord, the EVM5277 comes with a
20A power cord. Under no circumstances
should the grounding prong on the cords be re-
moved.
It is very important for the safety of both
you and your customer to have each circuit
properly grounded. A qualified electrician
should perform all wiring in accordance with
the National Electrical Code and/or all local
codes. Separate circuits are recommended for
each cabinet in order to prevent product loss
due circuit overloading of malfunction of other
equipment which may be on the same circuit.
For proper operation of the equipment, voltage
measured at the compressor must not vary
more that 5% from the cabinet serial plate rat-
ing.
If either high or low voltage condition
exists, contact your electrician or local power
company. If service or maintenance is being
performed on the cabinet, make sure the power
supply to the cabinet is off before proceeding.
ELECTRICAL BOX –
The electrical box is located behind the
front access panel. Access to this box is gained
by removing this panel. The box may be slid
out for service after the hold down screw is re-
moved. After servicing this screw should be put
back in the case.

PAGE 5
The box contains the power switch, de-
frost time clock and temperature control.
Power to the cabinet should be disconnected
before any service is performed on this box.
POWER SWITCH –
The main power switch is located in the
electrical box. This switch controls all power to
the case. This switch must be in the off position
before starting any cleaning or service work on
the equipment.
DEFROST TIME CLOCK –
The time clock which is located in the
electrical box, provides a definite off-time so
that the evaporator will clear itself of frost.
The clock is provided with pins to initi-
ate defrost. The failsafe setting sets the length
of defrost from 2 minutes minimum to 110
maximum.
The clock is set for two defrost per day.
10 pm and 6 a.m at 20 minutes each. Extra pins
are provided in case there are more defrosts
required due to ambient conditions or heavy
usage.
If possible avoid setting the defrost dur-
ing the day or at peak usage times.
When inserting the pin (s), note the AM/
PM sections on the dial face. After inserting
pins, make sure the time pointer is pointing to
the correct time of day. For optimum perform-
ance, do not exceed more than four defrosts in a
24 hour period.
CONNECTIONS –
Check all electrical and refrigeration
connections thoroughly for tightness. Make
sure the refrigeration tubing is not rubbing or
chafing against itself or other components.
Electrical connections should be tight.
Condenser fan motor blades should
spin freely without hitting anything. Install all
protective covers, start the cabinet and allow
to pull down to temperature before loading.
SPECIFICATIONS – DIMENSIONS
Model Length Width Height
EVM3977 39” 33” 77”
EVM5277 52” 33” 77”
ELECTRICAL
Model Refrg. Run Fuse
EVM3977 R-404A 8.5 15
48 oz. 13.5 15
EVM5277 R-404A
50 oz/
BTU CAPACITY
BTU/
Model HR Evap Cond Amb
EVM3977 4080 20 110 75-80
EVM5277 6300 20 110 75-80

PAGE 6
SHELVING -
The EVM models come equipped with
four shelves. They are adjustable on one inch
increments. When loading the shelves with
product, they should be loaded so that the prod-
uct does not extend over the front edge of the
shelf. Product loaded over the edge will inter-
fere with air circulation in the cabinet. It is also
desirable to leave a small space between the rear
interior wall and the product on the shelves
to allow air to enter the cabinet interior through
the perforations in the rear wall.
The shelves are rated for 130 pounds
each load capacity. When installing the shelves,
first install the shelf support bracket at the de-
sired height. Place the rear of the bracket in the
desire slot. Raise the front of the bracket to-
wards the rear of the cabinet. Once the ends are
in the slot, rotate the bracket forward locking it
in place. Place the shelf on the bracket. Load
the product. The shelves are not to be slanted.
They must remain in a horizontal position.
TEMPERATURE CONTROL –
Interior cabinet temperatures are con-
trolled through the use of a bulb and capillary
type temperature control. The control is located
in the electrical box. The sensing element is
mounted on the left hand end of the evaporator
coil. The dial face of the control is marked with
readings that range from –10 to +50ºF.
The control is factory preset at 25º to 27º
to maintain 35-40º interior cabinet tempera-
tures. The differential is set at 8-10º, which is
the difference between cycle on and off tempera-
tures.
Turning the dial counter-clockwise will
achieve lower temperatures and turning it
clock wise will achieve higher temperatures.
The indicated dial temperature will not
directly correspond to the actual cabinet tem-
perature due to the sensing element location and
ambient conditions.
Turning the dial will not result in imme-
diate temperature changes. Allow some time be-
tween settings for the system to balance out.
To replace the control, turn off power to
the cabinet. Remove the front access panel and
electrical box cover. Loosen and remove screws
securing the control in place. Remove the prod-
uct from the base shelf of cabinet. Lift up and
remove base shelves. Remove the screws holding
the fan motor plenum and rotate plenum for-
ward. Remove the screws holding the coil cover
in place and remove it. Locate and remove plas-
tic cover in lower left hand of perforated back
panel. The control sensing element is located
behind this plastic cover. Reaching through,
slide the element from its holder. Remove the
control. Feed the element for the new control
through the cabinet in reverse order. Reseal all
penetrations around the new element.
Place the element back in its holder and
finish reassembling in reverse order. Secure the
control body in the electrical box. Replace all
covers. Turn power supply back on and allow
cabinet to reach proper operating temperatures
before reloading.

PAGE 7
and insert the sensing lead of the new ther-
mometer through the mounting bracket in
the grill and finish installing the new ther-
mometer in reverse order. Cleaning of the
thermometer sensing element is accom-
plished in the same manner.
LIGHTING –
Interior lighting is provided by a
cool white fluorescent bulb located un-
der the top header. The bulb is sleeved
to maintain proper heat around the bulb
for maximum light intensity and to pro-
tect the product in case of breakage. The
bulb can be replaced without removing
shelves or product. To replace the bulb,
twist the bulb and slide the prongs clear
of the lamp holder. Remove the shield
from the old bulb and put it on the new
bulb. When placing the bulb back in the
holders, make sure the prongs on the
bulb twist and lock into place.
LAMP SWITCH –
The lamp switch is located on the
left hand end of the upper header near
the lamp. There will be a blue label near
the switch. This switch controls the lamp
only. Before replacing a bulb or ballast,
make sure power to the cabinet is dis-
connected.
CONDENSING UNIT –
A regular program should be established
for cleaning the fin and tube condenser. Nor-
mally this cleaning is required every 3-4 months,
but individual store conditions may dictate other-
wise. A clean condenser increases cabinet effi-
ciency and extends compressor life.
Access to the condenser is gained by re-
moving the front access panel. Power should be
disconnected to the cabinet before removing this
panel. Slide the condensing unit forward. Clean
the surface of the fins with a vacuum or soft
brush. Do not use hard or sharp objects as dam-
age to the fins and tubing may occur. Com-
pressed air may be used. However, proper safety
precautions should be observed. After cleaning,
carefully push the condensing unit back in mak-
ing sure not to kink or pinch any tubing or wires.
Also make sure the tubing and wires are not rub-
bing on any other components. Make sure all
drain hoses are back in the proper places before
replacing front access cover.
THERMOMETER –
The thermometer readings are in both
Centigrade and Fahrenheit. The sensing bulb for
the thermometer is located in the rear right hand
corner behind the evaporator coil. The ther-
mometer may be replaced by lifting up and re-
moving the return air grill. Push upwards on the
thermometer body until it is free from its mount-
ing bracket. Remove product off the interior bot-
tom and lift out the bottom shelves. Follow the
sensing lead to the rear of the coil and remove the
end of the sensor from its retainer. Remove the
old thermometer

PAGE 8
CLEANING EXTERIOR –
When cleaning the exterior of the
cabinet, use a soft cloth or sponge with wa-
ter and a mild detergent. Do not use any
thing abrasive as this will mar the finish.
Clean the glass with a glass cleaner of your
choice.
CLEANING INTERIOR -
Disconnect the power and remove all
product. Allow the cabinet to warm to room
temperature. Remove the front access panel
NIGHT COVER –
All EVM models come equipped with a
night cover as a standard feature .The handle
for the cover is located near the lamp. Grasp
the handle and pull downward until enough of
the cover has been exposed allowing the han-
dle to be placed over the retainer located on
the lower panel. In the event a night cover has
to be replaced, follow these steps: disconnect
power to the cabinet. On the top exterior of
the cabinet, there is a perforated metal cover.
Remove the cover. Lower the lamp fixture as
if you were replacing the ballast. Push the
night cover left or right and lift out. Install
the new cover in reverse order. Turn power
back on.
and monitor the amount of water going into
the condensate pan. It may be necessary to
remove some water so the pan does not over-
flow. Use a soft cloth or sponge with a mild
detergent to clean the interior. Check the
drain to ensure no debris has become lodged
in it during cleaning. Make sure the drain
hose(s) are into the condensate pan, set
timer for correct time of day, install all re-
moved covers. Wipe interior dry and restart
cabinet. Allow cabinet to achieve proper
operating temperature before reloading
product.
REFRIGERATION –
The EVM models employ a refrigera-
tion system using a hermetic compressor,
with refrigerant flow being controlled
through the use of a capillary tube. In the
event the capillary tube may become par-
tially or fully restricted, replace the entire
tube. Do not attempt to cut and/or splice the
tube. Capillary tube sizes are:
EVM3977 .049 I.D. x .020 O.D. x 78 inches
long. EVM 5277 .070 I.D. x .020 O.D. x 75
inches.
LEAK TESTING –
The test gas cylinder must be equipped
with a pressure gauge and regulator so that sys-
tem test pressures do not exceed maximum al-
lowable limits. Do not ever use anything other
than a R-22/Nitrogen mixture for leak testing.
Attach a refrigerant test gas cylinder to
your service manifold and connect the manifold
to the charging port on the liquid line valve.
Charge an R-22/Nitrogen mixture into
the system, raising the pressure to the
unit’s nameplate for the low side and high
BALLAST –
The ballast is located on the top inte-
rior of the cabinet near the center of the
cabinet. Access to the ballast is gained by re-
moving the two screws, (one on each end) of
the lamp fixture. Rotate the fixture down to-
wards the bottom of the cabinet.

PAGE 9
side pressures. Using an electronic detector,
carefully check the entire system for leaks. Take
special care to inspect all brazed and flare con-
nections.
EVACUATION –
After the system is proven leak tight, thor-
oughly evacuate the system according to the fol-
lowing procedure:
a. Discharge the refrigerant-nitrogen mixture,
allowing it to blow from the system as rapidly
as possible, into any empty cylinder. Be sure
that all service valves are open to allow all of
the mixture to be discharged.
b. Connect a deep-drain vacuum pump to both
the high and low side of the system. Pull a
vacuum on the system to at least 1500 mi-
crons.
c. Break the vacuum by adding refrigerant into
the system until the pressure is above 0 psig.
Always charge the refrigerant line into the
system through a new drier in the charging
manifold line. A 16 cubic inch drier is suffi-
cient for this purpose.
d. Repeat steps 2 and 3 two more times, the
third time evacuating the system to 500 mi-
crons.

PAGE 10
TROUBLE SHOOTING CHARTS
TROUBLE PROBABLE CAUSE SOLUTION
Compressor will not start
no noise
1. Power disconnected 1. Check service cord or
wiring connection.
2. Blown fuse or breaker 2. Replace fuse or reset
breaker
3. Defective or broken wir-
ing
3. Repair or replace
4. Defective overload 4. Replace
5. Defective temperature
control
5. Replace
Compressor will not start,
cuts out on overload
1. Low voltage 1. Check voltage at cabinet,
should not be more than
5% below rating.
2. Defective compressor 2. Replace
3. Defective relay 3. Replace
4. Restriction (pinched cap
tube)
4. Repair or replace
5. Restriction (moisture) 5. Leak check, replace
drier evacuate and recharge
6. Condenser blocked with
dust and dirt
6. Clean condenser
7. Defective condenser fan
motor
7. Replace
Warm storage temperature 1. Temperature control not
set properly
1. Reset control
2. Short of refrigerant 2. Leak check, replace
drier evacuate and recharge
3. Cabinet location too
warm
3. Move to cooler location
or correct excessive heat
source.