Hussmann ISFGG Kurzanleitung

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

ELECTRIC

80 psig for

R–22

104 psig for

R507

or R-404a

104 psig for

ISMGG/

RGG

MEDIUM TEMP

(DAIRY, DELI)

+ 24°F

OFF

TIME

80 psig for

R–22

54 psig for

R-134a

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.

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.

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