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Chapter 4 — System Installation Page 4 -2 REV. 3 2. Multiple Cylinder Installations. A single Model MCH3 /ECH3 /NMCH3 Control Head can actuate: A. Multiple Cylinder Actuation Using MCH3 /ECH3 /NMCH3 Control Head. ■ 1. Up to four (4) cylinders with a maximum of 25 ft. (7.6 m) of copper or stainless steel pneumatic tubing or stain - The Model MCH3 /ECH3 /NMCH3 Control Head can be used less steel actuation hose when using an 0-ring (Part No. to pneumatically actuate a maximum of five (5) agent cylin- 55531) installed in place of the Teflon washer and the 16 ► ders with a 16 gram CO2 cartridge. When a control head is gram CO2 cartridge. • used for multiple cylinder actuation, it cannot be mounted directly onto a cylinder valve. The control head must be 2. Up to five (5) cylinders with a maximum of 18 ft. (5.4 m) installed remotely using a Model MB -P2 Control Head of copper or stainless steel pneumatic tubing or stain - Mounting Bracket. The bracket must be anchored to the wall less steel actuation hose when using an 0-ring (Part No. using bolts or lag screws. 55531) installed in place of the Teflon washer and the 16 gram CO2 cartridge. CAUTION Do not screw the control head directly to a wall as this CAUTION will warp the control head, not allowing the mecha- Confirm the Teflon washer in the control head actuator nism to actuate. assembly has been replaced with the 0-ring (Part No. ► 55531) and the 16 gram CO2 cartridge is installed for 4 In order to actuate the agent cylinder(s) from a control and 5 cylinder single control head actuation. ►head, a 1/4 in. NPT x 45° 1/4 in. flare type fitting (conform - ing to SAE J513c) or male straight connector (Part No. The actuation line must be tested for any leaks by using a 32338) must be screwed into the base of the control head actuator. Also, a Model PDA -D2 Pneumatic Discharge hand held or electric vacuum pump. The pump should be Adaptor must be installed on the valve of each agent cylin- used to draw a vacuum on the actuation line at the fitting • der. Pneumatic tubing or stainless steel actuation hose is closest to the control head. A vacuum should be pulled to 20 then used to connect the control head to the PDA -D2 of inches of mercury. Leaks exceeding 5 inches of mercury each agent cylinder valve. See Figure 4 -3. within 30 seconds are not allowed. If the gauge on the vacu- um pump indicates a leak in the line, examine the actuation NOTE line for loose fittings or damage. Correct any leaks and ► retest. Pneumatic tubing used for remote cylinder actuation • shall have an outside diameter of 1/4 in. with a minimum • wall thickness of 1/32 in. This is commonly known as refrigeration -type copper tubing. All tubing fittings shall • be of the 1/4 in., 45° flare type conforming to SAE J513c. Compression type fittings are not acceptable. • MCH3, NMCH3, OR ECH3 HEAD • oo • i2. 1 OD COPPER TUBING /lc ORS. G.ACTUATOPNHOSE • • 1.41 N. NPT X45 1.4 IN FLARE TYPE FIT`. N3 SAE :ISI r ORMALE Ti.AIGH G:)NNECTOH SPAR" NO 371581 G: SS •op N 10 REMA: IN NG I tEi = •ruNDERS 17 "10 FLARED 1 TU3ING UT COPPER f BI `J(3 71 'Ei FDA -D5 AEI 111111 MEI .11111 IAN 2 Oil Figure 4 -3. Multiple Cylinder Actuation Using Model MCH3 /ECH3 /NMCH3 Control Head. 002873PC ULEX 3437 CEx732 March 17, 2004