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

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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

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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%.

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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.

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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.

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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

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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.

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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.

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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.