A-A-52545 Heaters, Vehicular Compartment 28 Volt, DcThis CID covers two types of heaters of 28 volt (V) direct current (dc) nominal rating, used for heating crew and engine compartments of military vehicles or equipment. Type I heaters are intended for use on military vehicles or equipment which may be required to operate in an ambient temperature to minus 65 degrees Fahrenheit (-65 Degrees F); from which a supply of gasoline is available; when heated air is required without the vehicle engine being operated. Type II heaters are intended for use on military vehicles or equipment from which a supply of heated circulating liquid (engine coolant) is available, which may be required to operate in an ambient temperature to -25 Degrees F.

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A-A-52545B

NOTES:

1. Dimensions are in inches. Unless otherwise specified tolerances are �0.010 for shell, �0.003 for washer and � 0.007 for terminal.

2. The cable shall be unshielded single conductor type, 14 AWG size, with outside diameter of 0.160 �0.010. The cable shall be designed and constructed as shown in A-A-52499.

3. Shell material shall be rubber grade M5BC610A14C12E034F19 or equivalent as specified in ASTM D2000.

4. Shell shall be marked �OZ� (ozone resistant).

5. Washer material shall be brass, temper 2 hard minimum.

6. Finished washer shall have burrs and sharp edges removed.

7. Terminal material shall be brass, temper 2 hard minimum.

8. Terminal finish shall be silver plate, 0.0002 minimum thickness.

FIGURE 2. Type II heater connector assembly.