INSTALLING ACTUATION PIPING

Before installing any actuation piping, the piping design must be determined. This will confirm that the lengths of actuation piping does not exceed the maximum allowable.

General Piping Requirements

1. Use only 1/4 in. Schedule 40 black iron, hot-dipped galvanized, chrome-plated, or stainless steel pipe/braided hose and fittings conforming to ASTM A120, A53, or A106.

2. Before assembling the pipe and fittings, make certain all ends are carefully reamed and blown clear of chips and scale. Inside of pipe and fittings must be free of oil and dirt.

3. The piping and fitting connections must be sealed with pipe tape. When applying pipe tape, start at the second male thread and wrap the tape (two turns maximum) clockwise around the threads, away from the pipe opening.

NOTICE

Do not allow tape to overlap the pipe opening, as this could cause possible blockage of the gas pressure. Thread sealant or compound must not be used.

4. Cast iron pipe and fittings are not acceptable.

5. Actuation piping must be rigidly supported by UL listed hangers as described on Page 7-6.

CAUTION

!

Do not remove the safety shipping caps at this time. They are provided to prevent accidental actuation and discharge during shipping and handling. If valve assembly is accidentally operated, velocity of unrestricted escaping gas is forceful enough to cause injury, especially about the face and head.

CAUTION

!

Proper fasteners must be used when mounting cylinder bracketing to wall or support. Failure to mount properly could cause cylinder movement upon discharge.

7-5 Actuation Piping Installation

1. Install 1/4 in. Schedule 40 pipe from gas outlet port on the ANSUL AUTOMAN release or ANSUL AUTOMAN II-C release to cylinder location. Use one of the 1/2 in. (1.3 cm) knockouts provided in the top, bottom, or side of the enclosure to exit the piping.

NOTICE

If system requires a manual pneumatic actuator, install a 1/4 in. check valve, Part 25627, in the 1/4 in. actuation piping outside the release mechanism and a 1/4 in. check valve near the pneu-matic actuator.

2. Maximum length of all 1/4 in. actuation piping cannot exceed 150 ft. (45.7 m).

3. If pneumatic operated accessories are required to be operated from the actuation pressure, branch off the 1/4 in. actuation piping and run to each accessory.

4. Install 1/4 in. tee in the actuation piping approxi-mately 24 in. (61 cm) before first carbon dioxide cylinder and install vent plug, Part No. 42175. See Figure 8.

5. Install actuation hose, Part No. 31809, 32335, or 32336 (depending on length required) between actuation piping and either the pneumatic actuator or the CO2valve. A 1/4 in. male connector, Part No.

32338, is required on each end of the actuation hose. See Figure 8.

FIGURE 8

001874

Hanger Applications

Install the pipe hangers in accordance with good piping practice as well as the following:

1. The maximum spacing between hangers must not exceed those listed below.

Maximum Spacing

Pipe Size Between Hangers

in. NPT ft. (m)

2. A hanger should be installed between fittings when the fittings are more than 2 ft. (.6 m) apart.

3. A hanger should be installed at a maximum of 1 ft.

(.3 m) from the nozzle.

4. The hangers must be UL listed and rigidly sup-ported. The Hanger Application Table and Figure 9 list some typical hangers used for different mounting surfaces.

Hanger Application Table Hanger

Type Application

No. 1 For attaching to wood beams

No. 2 On level ceilings of sufficient thickness to permit proper fastening

No. 3 For 2 in. and smaller pipe under sloping ceilings and roofs

No. 4 For special cases where punching is more economical than using clamps

No. 5 For sheathed ceilings of wood construction with sufficient thickness

No. 6 For most cases except where plastering is done after installation

No. 7 For attaching to concrete beams

No. 8 For attaching to lower flange of beam or truss No. 9 To keep piping closer to beam than is

pos-sible with clamp and ring

No. 10 Suitable for 3/4 to 2 in. pipe where necessary to hang pipe at a distance from wall

No. 11 For attaching to channel iron

No. 12 For attaching to bottom of steel beams

FIGURE 9

001875/3 rows

1. Pipe shall conform to ASTM specifications A53 or A106.

2. A120 pipe SHALL NOT BE USED.

3. All pipe up to and including 3/4 in. size to be standard weight black, stainless, or galvanized steel (Schedule 40).

4. All pipe over 3/4 in. size to be extra heavy black, stainless, or galvanized steel (Schedule 80).

5. Extra heavy galvanized malleable iron or ductile iron fittings should be used through 2 in. size; and galva-nized forged steel fittings in all larger sizes.

6. Refer to NFPA 12, “Carbon Dioxide Extinguishing Systems” for detailed piping requirements.

7. Cylinder and piping to be securely bracketed espe-cially at the fittings and nozzles.

8. Ream, clean, and blow out all pipe before installing.

9. All dead end pipe lines to be provided with a 1/2 in.

capped nipple, 2 in. long. See Figure 10.

FIGURE 10

001876

10. After assembly, blow out entire pipe system before installing discharge nozzles.

NO. 1 NO. 2 NO. 3 NO. 4 NO. 5

NO. 6 NO. 7 NO. 8 NO. 9

NO. 10 NO. 11 NO. 12

7-7 Distribution Manifold And Piping

1. Starting with the cylinder manifold, securely mount the manifold at the appropriate height as shown in Figure 11. Make certain that if accessories piping is to be done later that the end of the manifold contains a tee instead of an elbow. The outlet of the tee will later be reduced down to 1/4 in. for piping to the accessories.

2. Continue piping remainder of the distribution piping, following piping sketch and computer design com-pleted in System Design Section.

NOTICE

All piping shall be laid out to reduce friction losses to a reasonable minimum and care shall be taken to avoid possible restrictions due to foreign matter or faulty fabrication.

3. Before installing nozzles, blow air through complete piping system to determine there is no blockage.

4. Install discharge nozzles as specified on the com-puter design piping output sheet.

5. Install male end of flexible discharge bend, Part No.

427082, into each manifold inlet. Wrench tighten.

6. With cylinders securely mounted in bracket, attach female end of flexible discharge bend unto cylinder valve outlet. Wrench tighten.

sories, for detailed piping information.