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IGIP-DBP, DBRP 01,03-0210
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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 only in
Fahrenheit shall be accurate to 2°F. The thermometer should be
checked for proper calibration. (It should read 32°F when the
stem is immersed in an ice water bath).
b) LOCATION – The probe or sensing element of the thermometer
should be located in the airstream where the air first enters the
display or storage area, and not more than 1 inch away from the
surface and in the center of the discharge opening.
c) READING – It should first be determined that the refrigerator is
refrigerating and has operated at least one hour since the end of
the last defrost period. The thermometer reading should be made
only after it has been allowed to stabilize, i.e., maintain a
constant reading.
d) OTHER OBSERVATIONS – Other observations should be made which
may indicate operating problems, such as unsatisfactory product,
feel/appearance.
e) CONCLUSIONS – In the absence of any apparent undesirable
conditions, the refrigerator should be judged to be operating
properly. If it is determined that such condition is undesirable,
i.e., the product is above proper temperature, checks should be
made for the following:
1. Has the refrigerator been loaded with warm product?
2. Is the product loaded beyond the “Safe Load Line” markers?
3. Are the return air ducts blocked?
4. Are the entering air ducts blocked?
5. Is a dumped display causing turbulent air flow and mixing with
room air?
6. Are spotlights or other high intensity lighting directed onto the
product?
7. Are there unusual draft conditions (from heating /air-conditioning
ducts, open doors, etc.)?
8. Is there exposure to direct sunlight?
8. Are display signs blocking or diverting airflow?
9. Are the coils of the refrigerator iced up?
11. Is the store ambient over 75°F, 55% RH as set forth in ASHRAE
Standard 72 and ASHRAE Standard 117?
12. Are the shelf positions, number, and size other than recom-
mended by the manufacturer?
13. Is there an improper application or control system?
14. Is the evaporator fan motor/blade inoperative?
15. Is the defrost time excessive?
16. Is the defrost termination, thermostat (if used) set too high?
17. Are the refrigerant controls incorrectly adjusted?
18. Is the air entering the condenser above design conditions? Are
the condenser fins clear of dirt, dust, etc.?
19. Is there a shortage of refrigerant?
20. Has the equipment been modified to use replacements for CFC-12,
CFC-502 or other refrigerant? If so, have the modifications been
made in accordance with the recommendations of the equipment
manufacturer? Is the refrigerator charged with the proper
refrigerant and lubricant? Does the system use the recommended
compressor?
APPENDIX D. – Recommendations to user -
Refrigerated
1.0 The manufacturer should provide instructions and recommenda-
tions for proper periodic cleaning. The user will be responsible for
such cleaning, including the cleaning of low temperature equip-
ment within the compartment and the cooling coil area(s).
Cleaning practices, particularly with respect to proper refrigerator
unloading and warm-up, must be in accordance with applicable
recommendations.
1.1 Cleaning of non frozen food equipment should include a weekly
cleaning of the food compartment as a minimum to prevent
bacteria growth from accumulating. Actual use and products may
dictate more frequent cleaning. Circumstances of use and
equipment design must also dictate the frequency of cleaning the
display areas. Weekly washing down of the storage compartment
is also recommended, especially for equipment subject to drippage
of milk or other liquids, or the collection of vegetable, meat,
crumbs, etc. or other debris or litter. Daily cleaning of the
external areas surrounding the storage or display compartments
with detergent and water will keep the equipment presentable
and prevent grime buildup.
1.2 Load levels as defined by the manufacturer must be observed.
1.3 The best preservation is achieved by following these rules:
a) Buy quality products.
b) Receive perishables from transit equipment at the ideal
temperature for the particular product.
c) Expedite perishables to the store’s storage equipment to avoid
unnecessary warm-up and prolonged temperature recovery. Food
store refrigerators are not food chillers nor can they reclaim
quality lost through previous mishandling.