The carrying ability and the efficient operation of the Chrysler Air-Raid Siren will be affected if care in the selection of the location and the manner of installation are not given careful consideration. The following recommendations should be considered:

1. If full coverage is desired, the Sirens should not be more than 2 miles apart.

2. The highest building in each locality, with a structural strength sufficient to withstand a weight of approximately 6500 lbs., should be selected.

3. Consideration should be given to the accessibility of the roof. An inside stairway is preferred although a fire escape may be used.

4. Any necessary reinforcements that may apply to the individual structure should be made and, at the same time, making certain the base or foundation upon which the Siren unit is to be installed, is level.

1. Installation should be made on a corner of the structure, or over a supporting wall, and as convenient as possible to the entry to the roof.

2. The Siren should be installed level, with the base of the turntable securely bolted to its foundation. See Figure 2 for location of bolts.

3. Provisions for a 110 volt A. C. electric line should be made to the Siren installation to be used in connection with the engine water jacket heater and the battery trickle charger.

The engine and blower units are properly aligned on a rigid frame. Therefore, it is advisable to make installation of the Siren as a complete unit.

In any instance where the Siren must be disassembled for installation purposes, the following procedure will apply.

1. Remove half-around sheet metal guard between engine unit and horn unit.

2. Place wooden blocks under each end of frame so it will not tip when weight of the horn is removed.

3. Remove the two dowel pins, one located on each side of the horn unit at the flange, (Drive the dowel pins upward.)

4. Remove the two sheet metal panels located just above the dowel pins.

5. With the use of a hoist, raise the horn blower unit until the weight is off the frame and then slide it back until the spline shaft slides out of the universal joint flange.

IMPORTANT:

FIXTURES ARE ATTACHED TO THE TOP OF THE BLOWER HOUSING FOR RAISING AND LOWERING THE BLOWER ASSEMBLY. WHEN THESE FIXTURES ARE NOT CONVENIENT TO USE THE SLING CHAINS OR HOOKS SHOULD BE ATTACHED AS SHOWN IN Fig. 3.

UNDER NO CIRCUMSTANCES SHOULD THE CHAINS BE PLACED UNDER THE HORNS.

IF IT IS NECESSARY TO SET THE HORN BLOWER UNIT ON THE FLOOR, IT SHOULD REST ON 12"x12" TIMBERS AS INDICATED IN Fig. 3. DO NOT PERMIT THE UNIT TO REST DIRECTLY UPON THE BLOWER HOUSING OR THE HORNS.

6. Remove side panels from engine unit.
7. Remove sheet metal below engine side panels.
8. Remove sheet metal below radiator.
9. Remove frame to engine attaching bolts from each corner of engine unit.
10. Remove siren turntable drive belt from large pulley. Lift belt out of upper drive pulley, which leaves engine unit free to be lifted from the frame.
11. Remove engine from frame.

To reassemble the Siren, reverse above operations.