A-A-52150
testing of the system completed prior to final charging with refrigerant.
3.6.2 Operational test. The explosion-proof refrigerator freezer with the doors in an open position, shall be placed in a test room with the ambient temperature controlled at 90°F ± 20°F. After soaking for 4-hours, the doors shall be closed and the refrigerator-freezer shall be operated and the interior temperatures recorded. The refrigerator compartment shall pull down to and maintain a temperature of 38°F ± 2°F in the general storage area, and the freezer compartment shall maintain a temperature of –10°F or lower, within 8 hours. During the test, compressor unit shall not cut-out on the overload. Any failure to meet these requirements constitutes failure of the test.
3.6.3 Insulation test. During the operational test, the exterior of the refrigerator shall be visibly monitored for condensation every 30-minutes. Any presence of condensation shall constitute failure of the test.
4. PACKAGING
4.1 Packaging and packing. Packaging and packing shall be commercial or export as specified (see 5.2).
4.2 Commercial packaging and packing. Each refrigerator-freezer shall be preserved, packaged and packed in accordance with ASTM D 3951.
4.3 Export packaging. Each refrigerator-freezer shall be preserved and cushioned to protect against corrosion, deterioration and physical damage during shipment and storage.
4.3.1 Export packing. Each refrigerator-freezer shall be packed in a snug-fitting, wood-cleated plywood box conforming to PPP-B- 601. The contents of each box shall be cushioned, boxed and braced to prevent movement and damage during transit. Each box shall be closed and strapped in accordance with PPP-B-601.
4.4 Marking (commercial and export). Marking of shipping containers shall be in accordance with MIL-STD-129.
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