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iron, or extra heavy brass and are to be suitable for a burst pressure of not less than 6,000 lbs. per square inch.

When installing piping, DO NOT use white or red lead, or pipe dope in any form whatever. All joints are to be made tight by pulling up with a pipe wrench. Bends in the piping are permissible and may be used instead of elbows, provided that the cross sectional area of the pipe is not decreased. It is essential that the pipe be reamed after cutting. All pipe must be securely hung, especially at the Multi-jet nozzles, and must be kept clean and free from any metal chips or other foreign material as this may clog the orifices of the nozzles.

It is recommended that the piping system be blown clear before installation of the nozzles. If in doubt as to the tightness of joints, the piping should also be capped and pressure-tested for leaks.

For a one or two-cylinder system, run piping from the discharge head outlet, or "Y" fitting, to the space protected. For a three or four-cylinder system, run the piping from the manifold to the space protected.

For piping size and distribution in the space protected, see the proper illustration applicable to your system.

NOZZLES

All Multi-jet nozzles supplied are to be used and placed as shown on the illustration for your particular system. The nozzles should be mounted independent of the cylinder to avoid dislocation of the nozzles whenever the cylinder is removed for recharging or weighing.

The nozzles must be properly located by size so that the numbers stamped on the spud located within the nozzle correspond with the nozzle sizes shown on the system illustration.

  The nozzles should point in and downward at an angle of approximately 45". Make certain that no obstruction will block the discharge of carbon dioxide.

HEAT ACTUATOR

All heat actuators must be located in strict accordance with the following:

1. Heat actuators shall be installed over head in the high point of each space protected. At least one heat actuator shall be installed in each protected space.

2. Heat actuators shall be spaced not over 20 feet apart, and the ceiling area  protected by a single actuator shall not exceed 400 square feet. No bulk head shall be more than 10 feet away from the heat actuator.

3. Under no circumstances are the heat actuators to be installed on bulkhead of the space. In all cases the actuators must be installed overhead. Beams not in excess of 24" may be disregarded.

4. If any special conditions exist that set up a draft, the heat actuator  should be placed in a location where the heat would most likely strike  first.

5. Install the heat actuator, using four wood or machine screws of suitable length. Handle the actuator carefully, since it is constructed of very thin metal to insure utmost sensitivity to heat.

ACTUATOR TUBING

The actuator tubing furnished with this system is of special extra heavy construction so that it is especially resistant to damage. If the quantity furnished is not sufficient, additional lengths may be obtained from Walter Kidde & Company, Inc., Belleville, New Jersey. Do not use any type of copper tubing other than that furnished. This is important; as ordinary tubing is very easily damaged and may cause failure of the system.

The tubing is furnished in approximately 12-foot lengths, with both ends flared and fitted with a tube fitting and protection cap to prevent entrance of moisture or foreign matter. It is difficult to flare this tubing, therefore it is recommended that the full length be used, any excess being taken up by coiling.

Should it be impossible to avoid flaring the tubing, it must first be annealed by heating to a cherry-red color and then quickly quenched in water. Then it can be flared by using an "Imperial Brass" flaring tool. This flaring tool is not furnished with the system but may be purchased as an extra.

On three and four cylinder installations, two control heads are furnished. These control heads must be connected in tandem to a common actuator line since the control head marked "Tandem Control" is without an air vent.

HEAT ACTUATOR AND TUBING

Before actually making any connections to the heat actuators, all tubing must be tested to see that it is free and clear of dirt, moisture, or any other foreign matter. This is done by using the manometer test set. Instructions for use of the manometer test set are repeated on the set itself.

Fasten all actuator tubing securely with the clips provided. Place clips approximately 18 inches apart.

If a single length of tubing is not sufficient to reach the automatic control head, it is necessary to connect another length of tubing by means of the coupling furnished. Test each joint as it is made, following the instructions outlined under "Testing, Maintenance, & Recharging." The final connection to the automatic control head diaphragm chamber will be made later.

When two or more heat actuators are used, they must be connected together by tees. After the tube lines from the actuators are installed and tested, connection may be made to the tee to test the tightness of all connections leading up to it. Then test the line leading to the automatic control head and connect it to the tee.

AUTOMATIC CONTROL HEAD

The automatic control head should be tested before being installed on the cylinder valve. See procedure outlined under "Testing, Maintenance, & Recharging."

1. Remove control head outlet protection cap from cylinder to be equipped with control head.

2. Be sure automatic control head is in its set position. Arrow on reset stem should line up with "Set" arrow on control head nameplate.

3. Assemble control head to outlet of cylinder valve, tightening mounting nut securely.

4. Connect heat actuator tubing securely to diaphragm chamber of automatic control head. Test the tubing from this  point before connecting it to the control head.

5. For remote control systems, remove the control head nameplate exposing the manual release chamber. Refer to Figures 2 & 3.

6. Loosen the cable clamp screws on the manual release block and feed the cable from the pull box into  place. Be careful not to move the actuating levers during this operation as the control head may operate, resulting  in loss of gas. Tighten the set screws securely, allowing the cable to sag a little. Do not pull the cable tight.  Cut off excess cable. Where two control heads are used, as in 3 and 4 cylinder systems, the cable must pass from the first control head through the cable housing to the second control head in a continuous length.

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