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dioxide. When the Automatic Control Head operates, gas pressure is conducted through drilled passages in the valve to a large piston which advances and unseats the valve main check, thereby releasing the entire contents of the cylinder.

DISCHARGE HEAD
Mounted atop the vertical flood valve is the discharge head, which transmits the pressure required to open the main check of the flood valve. The discharge head is also the outlet for the carbon dioxide as the gas, when released, passes through the discharge head and out into the piping system.

AUTOMATIC CONTROL HEAD
The control head, known as the Kidde type RR (rate-of-rise) control head, is mounted on the side of the cylinder valve, and transmits the impulse from the heat actuator to a diaphragm within the control head which, through a series of levers, depresses the pilot check of the vertical flood valve as described previously. The control head is spring-loaded and can be reset with a screwdriver after operation. Visual inspection will show if the control head is in "Set" position. A release lever for emergency manual operation is conveniently mounted on the control head.
HEAT ACTUATOR
  The actuator is a sensitive chamber which contains air at normal room pressure and temperature. It is connected to the control head through tightly sealed actuator tubing. A rise in temperature causes an increase in pressure within the actuator system. If the temperature rises at a normal rate, the pressure is bled off through a vent in the automatic control head; when the rise in temperature becomes excessive however, the vent cannot bleed off the pressure fast enough, and the control head operates.
NOZZLES
Kidde Multi-jet nozzles are designed to distribute the gas smoothly and evenly, with a minimum of turbulence. Several opposed orifices in the nozzle eliminate recoil and lessen the possibility of clogging by foreign matter. me nozzle orifice size is stamped on the spud inside the shield. The discharge rate is so high and the distribution of gas so effective that one Multi-jet nozzle will do the work of several nozzles of older styles.

MANUAL RELEASE
For manual operation of the system, a manual release is located at the control cylinders . On remote control installations, the system can also be operated from a pull box.
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A-DISCHARGE HEAD GAS PASSAGE
B-DOUBLE "O" RINGS
C-DISCHARGE HEAD MOUNTING THREADS
D-CYLINDER VALVE GAS PASSAGE
E-CONTROL HEAD MOUNTING THREADS
F-CYLINDER VALVE MOUNTING THREADS
G-DISCHARGE HEAD GAS PASSAGE
H-DISCHARGE HEAD GAS OUTLET
I-SAFETY DISC RETAINER OUTLET HOLES

1-PISTON ASSEMBLY
2-BALL CHECK
3-PISTON STEM GASKET
4-CHECK
5 -VALVE SEAT
6-SLEEVE
7-PILOT CHECK
8-SIPHON TUBE
9-CAP
10-PISTON GASKET
11-PISTON SPRING
12-BALL CHECK
13-CHECK STOP
14-SWIVEL NUT WIRE
15-SEALING GASKET
16-SWIVEL NUT
17-MAIN CHECK
18-MAIN CHECK SPRING
19-CYLINDER VALVE BODY
20-SLEEVE RETAINER
21-SAFETY DISC WASHER
22-SAFETY DISC
23-SAFETY DISC RETAINER
24-CYLINDER

Installation-Standard Equipment, FOR MARINE SYSTEMS

CYLINDERS
In systems equipped with a remote control, the cylinders may be installed in the protected space. When no remote control is installed, the cylinders must be outside the space, easily accessible, suitably illuminated, and far enough from possible flames or smoke to permit operation of the local control at time of fire. In addition, all cylinder foundations should be level and must support a weight of approximately 25% greater than the charged cylinder weight.

Cylinders should not be installed in locations where excessive temperatures are expected, and should not be placed outside unless a weatherproof shelter is provided. The maximum safe storage temperature for normally filled cylinders is 140^oF. to 150^oF.

1. Before installing the cylinders they should be weighed to determine if they are fully charged. (See GENERAL, MAINTENANCE)

2. Install the cylinder racks as shown on the appropriate typical layouts.

3. Set cylinders into place and rotate the  control cylinder(s) so that the control outlet faces in the proper direction for mounting the control head, then tighten the racks securely.

PIPING
All 1/2" and 3/4" pipe used in conducting and distributing the carbon dioxide must be either standard weight, hot-dipped galvanized, scale-free steel, or standard weight brass. All 1" pipe must be extra heavy, hot-dipped galvanized, scale-free steel, or extra heavy brass.

All fittings used are to be extra heavy, hot-dipped galvanized malleable

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