Hussmann ISFGG Quick guide

January 2006
HUSSMANN - GLOVERSVILLE
INSTALLATION & SERVICE
INSTRUCTIONS
FOR
ISF
Island Spot Low or Medium Temperature
Remote and Self Contained Merchandisers
P/N OII – ISF Merchandiser
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
SECTION 1 GENERAL INFORMATION PAGE 3
SECTION 2 INSTALLATION PAGE 4
SECTION 3 REFRIGERATION PAGE 7
Self Contained Models
SECTION 4 REFRIGERATION PAGE 9
RemoteModels
SECTION 5 ELECTRICAL PAGE 18
SECTION 6 REPLACEMENT PARTS LIST PAGE 21
SECTION 7 USER INSTRUCTIONS PAGE 27
SECTION 8 SERVICE TIPS PAGE 29

Page 3
SECTION 1
GENERAL INFORMATION
MODEL DESCRIPTION
The ISCGG, ISFGG and ISM(R)GG models are island, spot display merchandisers. They are
available as either remote type, which require a separate condensing unit connection, or self-
contained. Each self-contained model will have it’s own condensing unit, factory installed
beneath the display area of the case completely ready for operation when electrical service is
connected.
The ISFGG models are designed for dual-temperature operation; either Low temperature
(frozen food) or Medium temperature (fresh meat, dairy, and delicatessen models). The
ISFGG will have upper glass on 4 sides. The ISMGG model has been designed for medium
temperature operation and it will have the upper glass installed on all four sides. The ISFRGG
will have curved glass on all sides. The ISMRGG will have curved plexiglass on all sides. The
ISCGG models are designed for ice cream merchandizing.
The following table lists the standard models with a brief description of each, including the
electrical requirements of the self-contained model. Unless otherwise specified, the electrical
requirements for all remote models will be 120 volt, 60 hertz (Hz).
MODEL ELECTRICAL DESCRIPTION
MODEL DESCRIPTION ELECTRICAL SERVICE
ISCGG-R Remote Type, Ice Cream
ISMGG – R Remote Type, Medium Temperature
ISFGG – R Remote Type, Dual Temperature, straight glass (1)
ISFRGG – R Remote Type, Dual Temperature, curved glass (2)
ISMRGG-R Remote Type, Medium Temperature, curved plexiglass
ISMGG – B Self-Contained, Medium Temperature, straight glass 120 / 60 Hz / 1∅
ISFGG – B Self-Contained, Dual Temperature, straight glass (1) 120 / 60 Hz / 1∅
ISFRGG – B Self-Contained, Dual Temperature, straight glass (2) 120 / 60 Hz / 1∅
ISMRGG-B Self-Contained, Medium Temperature, curved
plexiglass
120 / 60 Hz / 1∅
ISCGG-D/G Self-Contained, Ice Cream 208v / 230v / 60 Hz / 1∅
ISFGG – D/G Self-Contained, Dual Temperature (1) 208v / 230v / 60 Hz / 1∅
ISFRGG – D/G Self-Contained, Dual Temperature (2) 208v / 230v / 60 Hz / 1∅
APPLICATION
These models are designed for use only in air-conditioned stores where temperature is 75°F or
less and relative humidity does not exceed 55%.

Page 4
SECTION 2
INSTALLATION
SHIPPING DAMAGE
All equipment should be thoroughly examined for shipping damage before and during
unloading.
This equipment has been carefully inspected at our factory and the carrier has assumed
responsibility for safe arrival. If damaged, either apparent or concealed, a claim must be made
to the carrier.
If there is any damage, the carrier should be notified immediately and an inspection requested.
The delivery receipt must be noted that equipment was received damaged. If damage is of a
concealed nature, we suggest the carrier be contacted immediately, or no later than (3) days
following delivery. The claim must be filed with the carrier, by the consignee, for all damage.
SHIPPING BRACES
Move the fixture as close as possible to its permanent location, then remove all packaging and
shipping braces. Remove all separately packed accessories such as kits, shelves, etc.
EXTERIOR LOADING
These cases are not structurally designed to support excessive external loading, loading such as
the weight of a person. Therefore, do not walk on the top of these refrigerators or damage to the
refrigerator as serious personal injury could occur.
LOCATION
These refrigerators, like other open refrigerators, are sensitive to air disturbances. Air currents
passing around them will seriously impair their operation. Do not allow air-conditioning,
electric fans, open doors or windows, etc. to create air currents around these cases.
Located in the lower front and rear of the base are vented panels. These panels allow air
circulation to the condensing unit. Blocking or restricting air circulation through these panels
can cause poor performance and damage the refrigeration system.
INSTALL THE REFRIGERATOR NO CLOSER THAN (4) FOUR INCHES FROM A
WALL OR OTHER STORE FIXTURES.

Page 5
LEVELING
The refrigerator must be level to insure proper operation of the refrigeration system and to
insure proper drainage of defrost water. Use the leveling shims provided to level the case with
the aid of a carpenter’s level. Leveling must be performed from front-to-back and from side-to-
side.
WASTE OUTLET and WATER SEAL
The waste outlet, for all models, is located in the centre of the case. The outlet has a factory
installed, external water seal.
•On self-contained models………This water seal is formed by a moulded trap that drains into
the condensate evaporation pan located beneath the case.
•On remote models…………….. This water seal is formed by a moulded trap that requires
drip piping to connect with floor drain. The case is
equipped with a 1.5” female N.P.T. for field installation.
SEALING CASE TO FLOOR
If required by local sanitary codes or if customer desires, case may be sealed to the floor using a
vinyl cove base trim. The size needed will depend on how much variation there is in the floor,
from one end of the case to the other. Sealing of the lower front and rear panels on self-
contained models may hamper their removal for servicing or maintenance of the condensing
unit.
CAUTION: DO NOT ALLOW SEALING TRIM TO COVER ANY INTAKE OR
DISCHARGE GRILLS LOCATED IN THE LOWER FRONT PANEL.

Page 6

Page 7
SECTION 3
REFRIGERATION - SELF CONTAINED MODELS
Each self-contained model will be equipped with its own condensing unit located beneath the
display area. The unit will be charged with refrigerant and shipped from the factory with all
service valves open, completely ready for operation when electrical power has been connected.
The ISF and ISFG compressors are mounted on vibration springs, which have been torqued
down prior to shipment , to prevent damage.
ALL LOWER BASE PANELS MUST BE IN PLACE WHEN THE REFRIGERATOR IS
OPERATING. IF NOT, AIRFLOW FROM THE CONDENSER WILL BE DIRECTED OVER
THE EVAPORATOR PAN AND DEFROST WATER IN THE PAN MAY OVERFLOW.
REFRIGERANT CHARGE
MODEL REFRIGERANT OUNCES
ISFGG/RGG-5 R - 22 80
ISMGG/RGG-5 R - 22 79
ISMGG/RGG-10 R - 22 79 ea unit
ISFGG/RGG-10 R - 22 80 ea unit
ISCGG-5 R-404 56

Page 8
CONTROLS and ADJUSTMENTS
REFRIGERATION
CONTROLS c
DEFROST CONTROLS d
MODEL
PRODUCT
APPLICATION
DISCHARGE AIR
TEMPERATURE
DEFROST
FREQUENCY
(HOURS)
TYPE OF
DEFROST
PRESSURE
TERMINATION
FAILSAFEe
TIME
(MINUTES)
LOW TEMP
(FROZEN FOOD)
- 10°F 12 ELECTRIC
All
ISFGG/
RGG
And
DUALTEMP
ISCGG
MEDIUM TEMP
(DAIRY, DELI)
LOW TEMP
(ICE CREAM)
+ 24°F
- 20°F
12
12
ELECTRIC
ELECTRIC
80 psig for
R–22
104 psig for
R507
or R-404a
104 psig for
30
30
ISMGG/
RGG
MEDIUM TEMP
(DAIRY, DELI)
+ 24°F
12
OFF
TIME
80 psig for
R–22
54 psig for
R-134a
70
cA refrigeration thermostat controls refrigeration temperature. This is factory installed in
the control panel. Adjust this thermostat to maintain the discharge air temperature
shown. Measure discharge air temperatures at the centre of the discharge honeycomb.
dOn self contained models, defrosts are time-initiated and pressure terminated. The
defrost timer is factory set as shown. All that is required is to set the timer to the correct
time of day.
eTo insure a thorough defrost, defrost must be terminated by pressure termination setting,
not by time. It may be necessary to increase this failsafe time in some instances.

Page 9
SECTION 4
REFRIGERATION - REMOTE MODELS
REFRIGERANT TYPES
These refrigerators are equipped for operation using the refrigerant listed in the following table
unless otherwise specified on the factory order. The correct type of refrigerant will be stamped
on the refrigerators serial plate located in the display area.
MODEL REFRIGERANT
All Models – ISF / GG / RGG R–22 or R(404a), R507
ISMGG / RGG R–22, R134a
REFRIGERANT PIPING
Refrigerant line connection sizes: All models
LIQUID LINE 3/8” OD
SUCTION LINE 5/8” OD
OUTLET LOCATION
The refrigerant line outlet is located at the right hand end of the refrigerator beneath the display
pans. After connections have been made, seal this outlet thoroughly both on the inside and the
outside. An aerosol dispensed urethane type of insulation is recommended.
LINE SIZING
Refrigerant lines should be sized as shown on the refrigeration legend prepared for the store and
as (furnished by the owner). If a legend has not been furnished, refer to Section 12 of the
Hussmann Application Engineering Manual for guidance.
OIL TRAPS
P-traps (oil traps) must be installed at the base of all suction line vertical risers.
PRESSURE DROP
Pressure drop reduces capacity of the refrigeration system. To minimize pressure drop, use
proper size tubing, keep the refrigerant line runs as short as possible and use a minimum number
of elbows. Where elbows are needed, use long radius elbows only.

Page 10
PIPING INSULATION
For refrigerators with other than KOOLGAS defrost, the suction and liquid lines should be
clamped and/or taped together and insulated for a minimum of 30 feet from the refrigerator.
Refrigerators with KOOLGAS defrost should not have their liquid and suction lines in contact
with each other but are to be separately insulated for a minimum of 30 feet from the refrigerator.
Additional insulation for the balance of the refrigerant lines is recommended and required
wherever condensation and dripping would be objectionable.
EXPANSION VALVE ADJUSTMENT
Expansion valves must be adjusted to fully feed the evaporator. Before attempting to adjust
valves, make sure the evaporator is either clear of / or only lightly covered with frost, and that
the fixture is within 10°F of it’s expected operating temperature.
Adjust the valve as follows:
Attach two sensing probes (either thermocouple or thermistor type) to the evaporator. One
under the clamp holding the expansion valve bulb and the other securely taped to an evaporator
coil return bend about ½ way through the coil.
OR
A) Attach a probe to the suction line near the expansion valve
B) Obtain a pressure reading from the factory Schraeder valve
Convert the pressure reading to a saturated temperature for the appropriate
refrigerant.
Temperature B minus Temperature A = Super Heat
Some “hunting” of the expansion valve is normal. The valve should be adjusted so that during
the hunting the greatest difference between the two temperatures is 3°F to 5°F.
With this adjustment, during a portion of the hunting the temperature difference between the
probes will be less than 3°F (at times as low as 0°F).
Make adjustments of no more than (1/2) turn of the valve stem at a time and wait for at
least fifteen minutes before checking the probe temperature again and making further
adjustments.

Page 11
CONTROLS & ADJUSTMENTS FOR CONVENTIONAL OPERATION
(Single Compressor System)
Refrigeration temperature may be controlled by either the condensing unit’s low-pressure
control or by an (optional) refrigeration thermostat, (one per condensing unit). Thermostatic
control is preferred since it will provide a more constant year-round control of temperature. The
thermostat may be field or factory installed, must have a differential of 3°F to 6°F and have its
sensing bulb located to monitor the air leaving the evaporator. One thermostat per condensing
unit is required and should be wired into the compressor motor contactor control circuit.
A pump down system is recommended for outdoor condensing units.
DEFROST:
ISFGG / RGG, models have electrical defrost and are time initiated with pressure
termination.
For Koolgas application, a Klixon sensor is mounted on the coil to provide a temperature
termination control signal.
ISMGG / RGG model is off-time defrost.

Page 12
REFRIGERATION DEFROST CONTROLS g
dLow Pressure Control Settings Defrost Timer
MODEL
Discharge
cAir
Temperature
Application
eUsed to Control
Temperature
fIf Thermostat
Controls Temperature
Defrost
Type
Defrost
Frequency
Failsafeh
Time
(Minutes)
Saturated
Suction
Temperature
(Cut-out)d
(Cut-in) d(Cut-out) (Cut-in)
- 20°F Low Temp
(Ice Cream)
-35°F -16°F 1-4 psig -10°F ELECTRIC 30 50°F
+24°F MedTemp
(Dairy Deli)
5°F 25°F 10°F 30°F ELECTRIC 30 50°F
ISCGG
ISFGG/
RGG
ISMGG/
RGG
+24°F
MedTemp
(Dairy Deli)
5°F 25°F 10°F 30°F
OFF
TIME
Every
12 Hours
70
50°F
cDischarge air temperature is to be measured by attaching a service thermometer to the discharge honeycomb at the centre of the case.
dLow-pressure control setting values are given as temperature. Convert this temperature to the corresponding refrigerant pressure.
eWhen the low-pressure control is used to control refrigeration temperature, set the cutout of the control to stop the compressor at the
discharge air temperature shown above.
fWhen a refrigeration thermostat is used to control temperature, set the pressure control as shown then adjust the thermostat to stop
the compressor at the discharge air temperature shown above. For outdoor condensing units, a refrigeration thermostat must control
refrigeration temperature.
gIf these spot display refrigerators are to be multiplexed with a different type refrigerator, compare these defrost settings with those
specified for the other refrigerator. If the settings are not compatible, refer to page 17.
hThe defrost timer of outdoor condensing units must control a liquid line solenoid for pump-down prior to defrost only. The failsafe
setting for outdoor units must be increased 4 minutes to compensate for the pump-down period.

Page 13
CONTROLS & ADJUSTMENTS – MIXED MULTIPLEXING
Refrigeration temperature may be controlled by a refrigeration thermostat sensing discharge air
temperature. The thermostat controls a liquid line solenoid (optional) or a suction line solenoid
(optional).
Electric defrost is time initiated and temperature terminated. Termination is initiated by a
“close-on-rise” Klixon sensor mounted on an evaporator tube.
“Off-time” defrost is time initiated and time terminated.
REFRIGERATION CONTROLS DEFROST CONTROLS e
Length of Defrost
MODEL
APPLICATION
DISCHARGE
AIR TEMP c
DEFROST
Frequency
(Hours)
Electric
(Minutes)
OFF
TIME
KOOL
GAS
Low Temp
(Frozen Food)
- 10°F 30
- 16
ISFGG-R
Medium Temp
(Dairy, Deli)
+ 24°F 30
- 16
ISMGG-
R
Medium Temp
(Dairy, Deli)
+ 24°F
Every
12 Hours
- 70 12
cDischarge air temperature is to be measured by attaching a service thermometer to the discharge
honeycomb at the centre of the case. Adjust the refrigeration control to maintain the discharge
air temperature shown above.
eIf these spot display refrigerators are to be multiplexed with a different type refrigerator,
compare these defrost settings with those specified for the other refrigerator. If these settings are
not compatible, refer to the previous page.
fKOOLGAS defrost is time initiated and time terminated. The defrost lengths listed above are
based upon laboratory testing but operation under actual store conditions may require that they
be lengthened to accomplish a thorough defrost. Some of the store conditions that can contribute
to a longer defrost are: low head pressure, long runs of refrigerant lines, store ambient, fixture
temperature operating lower than that recommended, seasonal ambient changes etc.
Each system shown on the “store legend” must have staggered defrosts to maintain stable compressor
loading and a sufficient supply of defrost gas.

Page 14
REMOTE CONTROL KIT (Optional)
The control settings listed in the preceding tables are those that will provide proper case performance. If
these spot display refrigerators are to be multiplexed with different types of refrigerator models, we
suggest that each spot display refrigerator be equipped with a “REMOTE CONTROL KIT”.
The remote control kit will insure better control of refrigeration temperature and provide additional
defrost controls that maybe needed since most other refrigerators do not have similar defrost frequencies
and terminations (fail safeguards) with these spot display refrigerators.
The remote-control kit will be factory installed below the display area of the spot display refrigerator. A
liquid line solenoid valve will also be installed.
The liquid line solenoid valve will open when energized. During refrigeration, the valve is controlled by
the refrigeration thermostat (close-on-rise of temperature) providing better and more specific control of
refrigeration temperature. The defrost timer controls the valve for defrost; closing the valve for
initiation; opening the valve at termination.
The remote control kit timer must be synchronized with the timer of the unit.

Page 15
DESCRIPTION HUSSMANN PART # MANUFACT. PART #
Liquid Line Solenoid Valve Sporlan A351 or B651
Refrigeration Thermostat 04-S-067 White Rogers 1710-4
On / Off Switch 03-S-286 Cutler Hammer 7599K1
Defrost Timer 03-S-269 Paragon 8045-0B

Page 16
DESCRIPTION HUSSMANN PART. # MANUFACT. PART #
Liquid Line Solenoid Valve Sporlan A351 or B651
Refrigeration Thermostat 04-S-067 White Rogers 1710-4
Disconnect Switch 03-S-286 Various “2PST”
Defrost Timer 03-S-269 Paragon 8045-0B

Page 17
SECTION 5
ELECTRICAL
CONNECTIONS
Electrical power connections are made at the left-hand end of the case, behind the removable base
panel. The left-hand end of the case is determined when facing the discharge honeycomb.
REMOTE MODELS
All electrical connections for remote models will be made in the junction box located behind the
removable base panel, at the left-hand end of the case.
SELF CONTAINED MODELS
All electrical connections for self-contained models will be made in the control panel of the case. All
electrical circuits have been terminated inside the control panel and “pig-tailed” wiring provided for
ease of connecting field wiring. See appropriate wiring diagram in this section.
CAUTION: THE FIXTURE MUST BE ELECTRICALLY GROUNDED.
ALL WIRING AND CONNECTIONS MUST COMPLY
WITH N.E.C., C.S.A. AND LOCAL CODES.

Page 18
SERIAL PLATE AMPERAGES
Serial plate amperes are the amperage figures that are stamped on the fixture’s Serial Plate. Although all
field-installed wiring must be sized to the Serial Plate amperages, the actual current or amps may be less
than specified. (Serial Plate is located on panel of the product display area.)
SELF CONTAINED MODELS
(Standard Configuration)
CIRCUIT REQUIREMENTS
MODEL
Power Supply
MCA
Minimum Circuit Ampacity
Of Serial Plate
ISM / G / G – 5B 120V, 60Hz, 1∅12.2 amps
ISF / G / G – 5B 120V, 60Hz, 1∅18.3 amps
ISM / G / G – 8B 120V, 60Hz, 1∅-
ISF / G / G – 8B 120V, 60Hz, 1∅16.2 amps
ISM / G / G – 10B 120V, 60Hz, 1∅-
ISF / G / G – 10B 120V, 60Hz, 1∅-
ISM / G / G - 5 D / G 208 - 230v, 60 Hz, 1∅-
ISF / G / G - 5 D / G 208 - 230v, 60 Hz, 1∅11.1 amps
ISM / G / G - 8 D / G 208 - 230v, 60 Hz, 1∅-
ISF / G / G - 8 D / G 208 - 230v, 60 Hz, 1∅16.5 amps
ISM / G / G - 10D / G 208 - 230v, 60 Hz, 1∅-
ISF / G / G - 10 D / G 208 - 230v, 60 Hz, 1∅-
ISM / G / G - 5K 208 - 230v, 60 Hz, 3∅11.1 amps
ISF / G / G - 5K 208 - 230v, 60 Hz, 3∅-
ISM / G / G - 8K 208 - 230v, 60 Hz, 3∅-
ISF / G / G - 8K 208 - 230v, 60 Hz, 3∅-
ISM / G / G - 10K 208 - 230v, 60 Hz, 3∅-
ISF / G / G - 10K 208 - 230v, 60 Hz, 3∅-
CircuitAmpacity
Circuit ampacity is calculated by the summation of the following
connected items; which may include but is not limited to.
Anti-short heaters, electric fans, electric defrost heaters, condensing unit, condensate heater, electric
defrost heaters, canopy and shelf lighting.

Page 19
SECTION 6
REPLACEMENT PARTS LIST: ISF MODELS
DESCRIPTIONITEM # HUSSMANN
PART #
1 380057
21-S-139
Fan Motor, Evaporator 6w, CW, 120v
- Morrill Motors # SPBE 6ABGV 101
- GE # 5KSP51CL227H
2 136260
21-S-133
Fan Blade, Evaporator
Morrill # FV 700 CW 20s
3 375026 Anti-Sweat Heater, Front Glass (ISFG only)
120v 1.24 amps, 148.68 watts
4 920057
19-S-758
Anti-Sweat Heater, Top Nosing Discharge
120v 0.23 amps, 28.6 watts
5 302720
19-S-751
Defrost Heater – 120v, 12.5 amps, 1500 watts
6 380064 Expansion Valve – Sporlan # EGV-1/2-Z
7 261933
04-S-067
Refrigeration Thermostat - White Rogers # 1710-4
8 294226
03-S-286
Disconnect Switch
9 047449
03-S-559
Defrost Timer - Paragon # 8245-0B
10 059995 Contactor Furnas
42BE35AF106 3P-115v-30amp
11 297179
21-S-141
Fan Motor, Condenser 120v, 25w CW
E.M. & S. # ESP-L25EMV16
12 118395
21-S-140
Fan Blade, Condenser – Torin # OU-1031-5
13 380061
17-S-533
Drier - Sporlan C-083-SHH
14 380062 Sight Glass – Sporlan # SA-135
15 035774
17-S-186
Crankcase Pressure Limit Valve
Sporlan # CRP-4 20
16 380063
17-S-551
Receiver – Sporlan # M-30E9

Page 20
SECTION 6
REPLACEMENT PARTS LIST: ISF MODELS
DESCRIPTIONITEM # HUSSMANN
PART #
Continued: ISF- R, ISF- B
ISFG- R, ISFG-B
ISFGG-R, ISFGG-B
17 380024
2-S-628
Compressor - Copeland
# KAMB – 0075 – CAA - 299
18 112033
25-S-114
Condenser – HeatCraft Inc. 0271099B00J
19 314580 High Pressure Control
TI # 26PSXXX WC400 K32-K
20 314573 Heater, Condensate
NOTE: Items 1 through 6 are standard parts for both the remote and
Self-contained models
Items 7 through 20 are standard parts for only the
Self-contained models