CYLINDER INSTALLATION

1. Single Cylinder Installation - PCL-300/460

The Model EN-MCU3 can be used for single cylinder installations. It can support either the Model PCL-300 or PCL-460 cylinder assemblies. The cylinder must be placed in the enclosure with the discharge port to the left. No additional mounting bracket is required when the Model EN-MCU3 is used.

In order to actuate the agent cylinder from the Model EN-MCU3's control mechanism, pneumatic tubing must be used to connect the actuator to the valve cap assembly of the agent cylinder valve. A 1/4" NPT x 1/4", 45⁰ flare type elbow is included and must be installed in the actuator of the Model EN-MCU3 Enclosure. See Figure 4-28.

NOTE: Pneumatic tubing (copper) used for cylinder actuation shall have an outside diameter of 1/4 in. (.6 cm) with a minimum wall thickness of 1/32 in. (.08 cm). This is commonly known as refrigeration-type copper tubing. All tubing fittings shall be of the 1/4", 45⁰ flare type conforming to SAE J513c. Compression type fittings are not acceptable.

2. Multiple Cylinder Installation - PCL-300/460

The Model EN-S can be used in conjunction with the model EN-MCU3 Enclosure or Model MCH3/ECH3 Control Head for multiple cylinder installations. A single Model En-MCU3 can be used to pneumatically actuate a maximum of three (3) agent cylinders. One (1) agent cylinder can be installed in the Model EN-MCU3 Enclosure; the additional agent cylinder(s) can either be mounted in a Model EN-S Enclosure or with a Model MB-15 Mounting Bracket. When an enclosure is used, the cylinders must be placed in the enclosure(s) with the discharge port to the left. No additional mounting bracket is required when a cylinder is installed in the Model EN-MCU3 or EN-S Enclosure.

In order to actuate the agent cylinders from the Model EN-MCU3, pneumatic tubing must be used to connect the EN-MCU3 actuator to the valve cap assembly of each agent cylinder valve. Pneumatic tubing must be run from the actuator inthe Model EN-MCU3 to the Model EN-S(s) through the side knockout. A 1/4", 45⁰ flare  x 1/4", 45⁰ flare x 1/4" NPT tee is included with the Model EN-S and must be installed in the Model EN-MCU3 actuator. See Figure 4-29.

NOTE: Pneumatic tubing (copper) used for remote cylinder actuation shall have an outside diameter of 1/4 in. (.6 cm) with a minimum wall thickness of 1/32 in. (.08 cm). This is commonly known as refrigeration-type copper tubing. All tubing fittings shall be of the 1/4", 45⁰ flare type conforming to SAE J513c. Compression type fittings are not acceptable.

A single Model EN-MCU3 can actuate a maximum of three (3) cylinders with up to 8 ft. (2.4 m) of copper tubing.

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