Hussmann GGSM Quick guide

January 2006
HUSSMANN - GLOVERSVILLE
INSTALLATION & SERVICE
INSTRUCTIONS
FOR
GGSM SPECIALTY MERCHANDISER
Low Temperature
Glass Front and Sides
P/N OII – GGSM
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

TABLE OF CONTENTS
Introduction 3
Inspection 3
Location and Clearance 3
Skid 3
Leveling 3
SerialPlate 4
Access Panel Removal 4
ElectricalBox 4
Power Requirements 4
LightedSign 4
Refrigeration System and Circulation 4
GlassHeaters 5
Electric Condensate Pan 5
DefrostTimeClock 5
Temperature Control 6
Temperature Control Replacement 6
Condenser 6
DefrostStatReplacement 6
Glass Heater Wire Replacement 7
Defrost Heater Replacement 7
BulbBallastReplacement 7
Defrost Timer Replacement ` 7
Thermometer 7
Service Specifications 7 & 8
Trouble Shooting Charts 8 – 10
Warranty and Parts Information 11 &12

3
INTRODUCTION –
The GGSM-3 is for the display of fro-
zen foods and/or ice cream products. The de-
sign of the cabinet allows mostservice op-
erations to be performed from the front of
the cabinet.
The GGSM-3 is designed to operate in
ambient conditions of 75º F / 24ºC, with hu-
midity levels not to exceed 55%. Conditions
not meeting this criteria will adversely effect
the cabinet performance.
INSPECTION –
The equipment has been skidded and
crated pri or to shipment from the factory. It
is the carrier’s responsibility to deliver it to
you in good condition until s uch time as you
sign for it.
Upon receipt of the cabinet, examine
the packaging for damage. If the packaging
is damaged, make specific notation on the de-
livery ticket as to the location and extent of
damage prior to signing for the piece.
Carefully remove packaging and ex-
amine the cabinet for damage. If damage is
found, contact the delivering carrier immedi-
ately and request that his agent prepare an
inspection report for the purpose of filing a
claim. THIS IS YOUR RESP ONSIBILITY,
NO T T HE F ACTORY’S
LOCATION –
Careful consideration should be given
when locating the cabinet in the store. Loca-
tions where direct sunlight would shine into
the cabinet for extended periods of time, and
locations where drafts from open doors,
air conditioning ducts, fans, and grills would
blow into the cabinet should be avoided
A minimum of 24 inches in the front of
the cabinet and 4 inches in the rear of the
cabinet is required when installing. This
clearance is required for proper intake and
discharge of air over the condensing unit.
SKID –
The shipping skid should be left on the
cabinet until it is placed near its location in
the store. The skid provides protection for
both the cabinet and the floor.
The skid is fas tened to the cabinet base
by 4 bolts located on the underside of the skid
protruding up through the cabinet base with
lock w ashers and nuts. Access for the re-
moval of these bolts is gained by removing the
front and side access panels. Once the nuts
have been removed the cabinet may be lifted
off the shipping skid and set in place.
At this time, the condensing unit area
should be checked for loose wires, tubing rub-
bing or broken, and setting of the timer to
correct time of day. Also check for tightness
of the defrost pins, loose connections on the
timer, etc. before repl acing the access panels.
LEVELING –
Once the cabinet is in place, it should
be leveled. Leveling may be accomplis hed by
using the leveling legs provided with the

4
cabinet. These legs are located on the under-
side of the cabinet base, in the front two cor-
ners of the base. A slight pitch from front to
rear is desirable for proper draining of the wa-
ter created during the defrost cycle. NEVER
HAVE THE REAR OF THE CABINET
HIGHER THAN THE FRONT !!
The cabinet also comes with four cast-
ers, (non-swiveling or locking), and two han-
dles on the back of the cabinet. These are pro-
vided so the cabinet may be easily moved to a
different location in the store if des ired.
SERIAL PLATE -
The cabinet serial plate is located on the
rear exterior wall of the cabinet. The serial
plate contains pertinent information about the
cabinet such as volts, refrigerant charge, re-
frigerant type, etc. The serial plate should
NEVER be removed or altered in any way.
ACCESS PANEL –
The front acces s panel covers the con-
densing unit compartment. To gain access to
the condensing unit, remove the screws holding
the panel in place. The screws are located on
the exterior underside of the cabinet directly
above the access panel. Once the access panel
has been removed, the condensing unit may be
pulled forward for servicing by removing the
hold down bracket.
ELECTRICAL BOX
–
The electrical component enclosure is
located behind the lower left access panel. Ac-
cess to the enclosure is accomplished by first
removing the front access panel, and then the
side panel. There are two screws in each end
of this panel. The electrical enclosure contains
the main power switch, defrost timer, temper-
ature control, and terminal boards. IMPOR-
TANT – DISCONNECT AL L PO WER TO
CABINET BEFORE SERVICING. THIS IS
FOR YOUR SAFETY – SERIOUS INJURY
OR DEATH MAY RESULT IF THIS IS NOT
DONE !!
POWER REQUIREMENTS –
The cabinet is designed to operate on
120 volts. It comes equipped with a 5-15A
NEMA plug. THE GR OUNDING PRONG
ON THIS PLUG SHOULD NEVER BE RE-
MOVED FOR ANY REASON. THIS IS FOR
EVERYONE'S PROTECTION!
The cabinet also requires a dedicated
circuit to ensure proper voltage is being sup-
plied to the cabinet. All electrical wiring
should conform to local and national specifi-
cations.
LIGHTED SIGN –
The lighted sign has its own on/off
power switch. The switch is located on the
rear of the fixture. The fixture also contains
the ballast and starter. Access to these com-
ponents is gained by removing the four screws
on the rear of the fixture. (Two on each end)
Slide the assembly straight up. Reassemble in
reverse order. ALWAYS REMEMBER TO
DISCONNE CT THE POWER SUPPLY BE-
FORE SERVICING.
REFRIGERATION SYSTEM and
AIR CIRCULATION –
The refrigeration system of the
GGSM-3 utilizes a capillary tube to feed the
evaporator, and a hermetically sealed com-
pressor. When servicing the evaporator

5
Section, care s hould be taken so as not to dam-
age the capillary tube.
Air is forced through the evaporator by
the use of two fan motors. These motors run
continuously through both the refrigeration
and defrost cycles. Air is taken in by the front
glass and discharged at the top rear of the cabi-
net interior. Care should be taken when l oad-
ing the cabinet with product, not to block these
areas .
GLASS HEATERS –
The front and side glass pieces are
heated through the use of heaters around the
exterior of the glass. These heaters are replace-
able in case of failure. Each piece of glass has
its own heater. The heaters are on continu-
ously. The glass is triple pane LOW-E coated.
ELECTRIC CONDENSATE PAN –
Evaporation of the condens ate water
created during the defrost cycle is accomplished
through the use of an electrically heated pan lo-
cated in the condensing unit are. The heater in
this pan is 300W and is cycled on and off by a
thermostat built into the heater. The drain car-
rying water to this pan should be trapped to
prevent warm air migrating back to the evapo-
rator.
Defrosting of the evaporator is accom-
plished through the use of five cal-rod type
heaters . Thes e heaters are located on the front
of the case under the front glass, on the front of
the evaporator coil, the top middle of the evapo-
rator coil, and the lower rear of the case behind
the evaporator coil. The heaters under the
front glass and cabinet rear are 150 watts each,
the tw o on the front and the top of the evapora-
tor are 350 watts eac h.
DEFROST TIMER –
The defrost timer is a 48 hour timer.
The de frost is factor y s et at two de frosts per
24 hours – at 10:00 a.m. and 10:00 p.m.,
with a 40 minute failsafe.
As previously mentioned, the timer
needs to be set for the correct time of day at
installation. This is accomplished by turn-
ing the knurled adjustment knob counter-
clockwise until the time indicator corre-
sponds to the correct time. If additional de-
frosts are required, extra pins are provided
with the timer for this purpos e, and should
be inserted in the timer face at the time(s)
desired.

6
The timer will need to be reset after a fail-
ure of the power supply, or if the power is turned
off for an extended period of time.
The defrost cycle is time initiated-
temperature terminated. The defrost stat is lo-
cated on the left hand side of the evaporator, on a
return bend of the tubing near the rear of the
evaporator. When the stat sens es a temperature
of 58ºF / 14ºC the defrost cycle is terminated. If
the stat should fail, then defrost is terminated by
the failsafe setting on the timer.
TEMPERATURE CONTROL –
The temperature control is located in the
electrical enclosure. The control is factory pre-
set to maintain ice cream storage temperatures.
Turning the control clockwise will derive colder
temperatures . The sensing tube for the control is
mounted on the cabinet interior rear wall. Access
to the tube is gained by removing the interior
rear wall panel .
CONDENSER –
The fin and tube condenser requires peri-
odic cleaning. To clean the condenser, remove
the front access panel. Using a soft brush, re-
move the dirt and lint off the fins. A vacuum or
compressed air may also be used. NEVER USE
A HARD OBJECT TO CLEAN THE FINS AS
DAMAGE TO THE CONDENSER MAY OC-
CUR!!
A regular schedule should be established
for the cleaning of the condenser. Failure to keep
the condenser clean will result in premature com-
pressor failure and/ or efficiency loss. Location of
the cabinet in the store and store traffic should be
considered when setting up this s chedule.
TEMPERATURE CONTROL
REPLACEMENT -
If there is product in the cabinet, it
must be placed in a storage freezer. Discon-
nect power to the cabinet. Remove the front
and left side access panels. Remove electri-
cal enclosure cover. Remove the knob on the
control and the two screws holding the plate
and control body in place. Remove the flag
connections from the control. Remove the
interior bottom pans and the rear interior
wall.
The wall has two screws, one in each
uppe r c orner, holding it i n pl ace. The sens -
ing bulb for the control is clamped to the
rear wall. Remove the clamp and replace the
control. Assemble in reverse order, reset
timer, and reconnect the power supply. Al-
low the cabinet to pull down to proper tem-
perature before reloading.
DEFROST STA T RE P LACEMENT -
Remove product from cabinet and place in
another freezer. Disconnect power to the
cabinet. Remove front and left side access
panels. Remove electrical enclosure cover.
Remove proper wires from stat connected to
terminal board. Remove interior bottom
pans. Remove stat from return bend on
evaporator coil and install ne w stat making
s ure retaining clip holds stat to tubing
tightly. Cut wires from old stat and tape
wires to new stat wires. Gently pull old
wires guiding wires through hole penetra-
tion in bottom of case. Connect new wires to
corres ponding numbers on terminal board.
Reset timer and reconnect power to cabinet.
Allow cabinet to pull down to proper tem-
perature before loading.

7
GLASS HEATER WIRE REPLACEMENT –
Disconnect power to cabinet. Remove
front and left side access panels. Remove electri-
cal enclosure cover. There are four individual
heaters hooked in series. One around each piece
of glass, and one located across the rear top of
the cabinet interior under the light fixture. Con-
nections for these heaters are in each of the four
corners of the cabinet.
To gain acces s to these heaters, remove
the light fixture and lift off the plastic top. Each
heater will have to be tested to find the defective
one. Lift out glass and replace defective heater
with new one exactly as the defective one was in-
stalled. Once heater has been replaced, reas sem-
ble cabinet in reverse order, reset timer and re-
connect power.
DEF ROST HEATER REP LACEMENT –
Remove product from cabinet and place
in storage freezer. Disconnect power to cabinet.
Remove front and left side access panels. Re-
move electrical enclosure cover. Remove bottom
interior pans. After locating defective heater, re-
move from location and install new heater in
place.
If replacing heater on the evaporator coil,
make sure new heater is in direct contact with
coil to ensure proper defrost. Cut wires from old
heater and tape new wires to old wires. Gently
pull wires through hole penetration in bottom of
cabinet and connect to proper terminals on ter-
minal board. Reset timer, and reassemble cabi-
net in reverse order.
BULB / BALLAST REPLACEMENT -
Disconnect power to cabinet. Remove
four screws from rear of fixture and slide as-
sembly straight up. Bulb, ballast and lam-
pholders are now exposed. Replace defective
component and reassemble cabinet. Turn
power to cabinet back on.
DEFROST TIMER REPLACEMENT –
Disconnect power to cabinet. Remove
front and left side access panels. Remove
electrical compartment cover. Remove
screws holding timer in place and install new
timer. Disconnect wires from old timer, one
screw at a time and install on new timer. Set
timer for correct time of day and install de-
frost pins in timer at proper time of day. Re-
assemble in reverse order and turn power
back on.
THERMOMETER –
The thermometer readings are in both
Centigrade and Fahrenheit. The sensing
bulb for the thermometer is located in the
right front of the cabinet near the evaporator
coil. The bulb is in the return air going to
the evaporator. The thermometer may be re-
placed by first removing the light fixture,
then the plastic top, and removing the bot-
tom pans covering the evaporator. Once the
thermometer has been replaced, reassemble
the cabinet in reverse order.
SERVICE SPECIFICATIONS –
Condensing Unit - M4CL-0060CFA
Compressor - Aspera
AFT26CIE-CFA
Relay Ass’y - 514C017-01

8
Cap Tube - .042 ID x .020 Wall Thick
x 83"
Min. Fuse Size - 15 amps
Refrig. Charge - 23 ounces R 404
652.05 grams
Operating Pressure 75F/24C 90F/32C
Head 215 235
Suction 10 10.5
TROUBLESHOOTING CHART
TROUBLE POSSIBLE CAUSE REMEDY
Compressor starts but
immediately cuts out on
overload.
1. Low voltage 1. Check voltage at cabinet.
Should be within 5% of serial
plate rating
2. Relay defective 2. Replace
Compressor will not start, no
hum.
1. Power disconnected 1. Reconnect power
2. Power switch off 2. Reposition switch to ON
3. Blown or tripped breaker 3. Reset breaker
4. Defective wiring 4. Repair or replace
5. Defective temp control 5. Replace
6. Defective overload 6. Replace
Compressor will not start, hums
but cycles on overload
1. Low Voltage 1. Check voltage at cabinet.
Should not be more than 5%
below serial plate rating.
2. Defective compressor 2. Replace
3. Defective relay 3. Replace
4. Restriction (pinched cap
tube)
4. Replace cap tube

9
5. Restriction (moisture) 5. Evacuate, replace drier,
recharge
6. Dirty condenser 6. Clean
7. Defective condenser fan
motor
7. Replace
Compressor runs continuously 1. Defective control 1. Replace
2. Short of refrigerant 2. Leak check, change drier,
evacuate, recharge
High head and suction
pressures
1. Air in system 1. Evacuate and recharge
2. Dirty condenser 2. Clean
3. Condenser fan motor not
working
3. Replace
4. Condenser discharge air
blocked
4. Remove obstruction
5. Defrost heater on during
refrigeration (possible defrost
heater joints grounded or time
clock defective)
5. Repair / replace
Low head and suction pressure 1. Short of refrigerant 1. Leak check, change drier
evacuate and recharge
2. Restricted cap tube 2. Replace
3. Coil iced up 3. De-ice and check defrost
cycle
Normal pressures, warm
cabinet
Refrigerant undercharge – Due to the fact that it takes a
considerale amount of undercharge before it has any great effect
on pressures and inaccuracy of gauges it is possible to have an
undercharge of refrigerant. This undercharge will “starve” the
coil and seriously affect the cabinet temperature.
Evaporator coil oil logged. Blow oil out of evaporator with high
pressure, (250-275 pounds), with dry nitrogen

10
Evaporator coil blocked with
ice
1. Defective time clock 1. Replace
2. Cabinet location in store 2. Move cabinet away from
door or other source of draft
3. Defective defrost heater 3. Replace
4. Defective defrost thermostat 4. Replace
The defrost thermostat should have the defrost circuit in the
closed position when the cabinet goes into defrost. It is set to
open that circuit at 58ºF/14ºC, at which time it also energizes the
solenoid in the time clock which trips the time clock off defrost
and back into the refrigeration cycle. It must be remembered
that when checking the time clock and defrost circuit, that the
time clock can be put into the defrost cycle manually by turning
the time clock dial, but the defrost heater will not come on until
the defrost thermostat temperature has been reduced below
32ºF/ 0ºC.
Defrost cycle too long 1. Terminating on timer
failsafe. (factory set 40 mins)
1. Replace defrost thermostat
The defrost termination thermostat should terminate the defrost
when it senses 58F/-10C.
Time clock mechanism not tripping off defrost due to bad
solenoid in the time clock. If there is an open circuit in the coil
of this solenoid, it will not trip the time clock mechanism off
defrost after the defrost termination thermostat has operated.
To determine if the solenoid is good, turn the clock into defrost.
Place a jumper across X and N at the clock. If the soldnoid is
good this will trip the clock off defrost indicating that it is
working.
Adverse conditions require a longer than normal defrost. Air
currents over and into the cabinet, or a great amount of usage
during conditions of high humidity could create excessive frost.

11
WARRANTY AND PARTS INFORMATION
IMPORTANT – Please read carefully to assure prompt and accurate service.
ORDERING PARTS REPLACEMENT –
v Contact your nearest Hussmann Dis tributor.
v Always specify model and serial number of cabinet.
v If correct part number is not know, give a clear description of part itself and its function in
the cabinet or remote unit.
WARRANTY PARTS PROCEDURE
v Same as first three items in Ordering Replacement Parts Procedure.
v Give original installation date of cabinet and, if possible, forward a copy of the original in-
voice or delivery receipt.
v All shipments of in-warranty replacement parts will be invoiced from the factory until such
time as the defective part is returned and proved to be defective by our Quality Control De-
partment.
v Contact your Huss mann Distributor for instructions on returning in-warranty parts.
v Warranty parts must be returned to the factory within 30 days of date of failure to assure
proper dis position.
v Lack of any of the above information may result in the shipment of the wrong part, or a de-
lay in shipment.
COMPRESSOR REPLACEMENT PROCEDURE –
1. Replacement compressors will not be shipped from the Hussmann factory. They may be ob-
tained from you nearest Compressor Wholesaler.
2. Your wholesaler will replace, free of charg e, any compressor found to be defective within
twelve months of installation, not to exceed twenty months from the date of manufacture –
as determined by the compressor serial number on the compressor serial plate.

12
For any defective compressor beyond the twelve or twenty month time period, a salvage
value credit will be given too partially offset the invoice for the replacement.
To obtain reimbursement forward to: Hussmann Corporation
140 East State Street
Gloversville, NY
12078
the following information:
The cabinet model and serial number
2. A copy of the wholesaler’s invoice, along with a copy of the salvage value credit.

M100-2187 B
WIRING DIAGRAM
GLOVERSVILLE, NY 12078

REV EO # REV DATE REV BY
APPROVED BY EO NUMBER
SCALE
SHEET #
DRAWN BY:
DATE DRAWN :
APPROVED BY:
5232-REV B
JHB
2/7/2000
-
INCHES
1 OF 1
7/7/2003 JJH
B
-
-
-REV B CHANGED WIRING OF LAMP
-
REV A- ADDED HIGH PRESSURE SWITCH 5/2002 BY JHB
-
TOLERANCES UNLESS OTHERWISE SPECIFIED: FRACTIONAL 1/32"
DECIMAL 0.031" ANGULAR 1° HOLE LOCATION & SPACING 1/64"
1 2 3 4 5 6 17 18 19 20 21 22 23 24
BLK
34
X
N
2
1
S1 S3
POWER
SWITCH
POWER
CORD
COMPRESSOR
CONDENSER
FAN
2
R
GGSM-3
DEFROST
T'STAT
BLK
BRN
RED
WHT
31 32 33 34 35 36 37 38 39 40
DEF HTR 1
DEF HTR 3
DEF HTR 5
DEF HTR 4
DEF HTR 2
WHT
TEMP.
CONTROL
PURP
PURP
EVAPORATOR
FANS
GLASS
HEATERS
LAMP BLK
STARTER
WHT
BLK
BLK
WHT
WHT
CONDENSATE
PAN
BRN
NOT USED
CAPPED OFF
TIME CLOCK
BALLAST
BLK BLK
LIGHT SWITCH
HIGH PRESSURE
SWITCH
WHT
BLK