Hussmann Chino RGD Installation And Operation Manual Download

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IGUP-RGD-0106

APPENDIX A. – Temperature Guidlines

The refrigerators should be operated according to the manufacturer’s
published engineering specifications for entering air temperatures for
specific equipment applications. Table 1 shows the typical temperature
of the air entering the food zone one hour before the start of defrost
and one hour after defrost for various categories of refrigerators.
Refer to Appendix C for Field Evaluation Guidelines.

TABLE 1

Type of Refrigerator

Typical Entering

Air Temperature

I. OPEN DISPLAY

A. Non frozen:

1) Meat

2) Dairy/Deli

3) Produce

a. Processed

b. Unprocessed

B. Frozen

C. Ice Cream

-5

II. CLOSED DISPLAY

A. Non frozen:

1) Meat

2) Dairy/Deli

3) Produce

a. Processed

b. Unprocessed

B. Frozen

C. Ice Cream

-5

Single Deck

Multi Deck

ServiceCase

Reach-In

I. Open Display Styles

II. Closed Display Styles

APPENDIX B. – Application Recommendations

1.0 Temperature performance is critical for controlling bacteria

growth. Therefore, the following recommendations are included in
the standard. They are based on confirmed field experience over
many years.

1.1 The installer is responsible for following the installation instruc-

tions and recommendations provided by the manufacturer for the
installation of each individual type refrigerator.

1.2 Refrigeration piping should be sized according to the equipment

manufacturer’s recommendations and installed in accordance with
normal refrigeration practices. Refrigeration piping should be

insulated according to the manufacturer’s recommendations.

1.3 A clogged waste outlet blocks refrigeration. The installer is

responsible for the proper installation of the system which
dispenses condensate waste through an air gap into the building
indirect waste system.

1.4 The installer should perform a complete start-up evaluation prior to

the loading of food into the refrigerator, which includes such items as:
a) Initial temperature performance, Coils should be properly fed with

a refrigerant according to manufacturer’s recommendations.

b) Observation of outside influences such as drafts, radiant

heating from the ceiling and from lamps. Such influence should
be properly corrected or compensated for.

c) At the same time, checks should be made of the store dry-

bulb and wet-bulb temperatures to ascertain that they are
within the limits prescribed by the manufacturer.

d) Complete start-up procedures should include checking through

a defrost to make certain of its adequate frequency and length
without substantially exceeding the actual needs. This should
include checking the electrical or refrigerant circuits to make
sure that defrosts are correctly programmed for all the
refrigerators connected to each refrigeration system.

e) Recording instruments should be used to check performance.

APPENDIX C. – Field Recommendations

Recommendations for field evaluating the performance of retail
food refrigerators

1.0 The most consistent indicator of display refrigerator performance

is temperature of the air entering the product zone (see
Appendix A). In practical use, the precise determination of return
air temperature is extremely difficult. Readings of return air
temperatures will be variable and results will be inconsistent. The
product temperature alone is not an indicator of refrigerator
performance.

NOTE

: Public Health will use the temperature of the product in

determining if the refrigerator will be allowed to display potentially
hazardous food. For the purpose of this evaluation, product
temperature above the FDA Food Code 1993 temperature for
potentially hazardous food will be the first indication that an
evaluation should be performed. It is expected that all refrigerators
will keep food at the FDA Food Code 1993 temperature for potentially
hazardous food.

1.1 The following recommendations are made for the purpose of

arriving at easily taken and understood data which, coupled with
other observations, may be used to determined whether a display
refrigerator is working as intended:
a) INSTRUMENT – A stainless steel stem-type thermometer is

recommended and it should have a dial a minimum of 1 inch
internal diameter. A test thermometer scaled only in Celsius or
dually scaled in Celsius and Fahrenheit shall be accurate to
1

C (1.8

F). Temperature measuring devices that are scaled

Appendices