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Chapter 2 — Components Page 2 -3 REV. 2 MODEL ECH3 - MODEL MB -P2 - CONTROL HEAD ELECTRIC CONTROL HEAD MOUNTING BRACKET The Model ECH3 electric control head is an electrically operated control head which can be connected to the The Model MB -P2 mounting bracket must be used to mount PCI- 15/25s/35/50s/70 cylinder valve. This control head will the Model MCH3, NMCH3 or ECH3 control head if the con support an electric thermal detection system, a remote trol head is not mounted directly on a cylinder valve. See ► mechanical pull station (Model RPS -M), and an electric gas Figure 2 -7. shut -off valve. It will not support a fusible link detection sys- • tem. A micro switch (Model MS -DPDT) is included. The Model ECH3 control head is available in both 120 VAC (Model ECH3 -120) and 24 VDC (Model ECH3 -24). It is equipped with a local manual control handle that allows for mechanical system actuation. Operation of the local manual control requires removing the pull pin and rotating the han- dle clockwise. The Model ECH3 control head can actuate a 0 • maximum of five (5) cylinders with the 16 gram CO2 car- ►tr 0 idge. See Figure 2 -6. MODEL ECH3; CONTROL HEAD Q I 4 , ` �I /- PULL P �I nmu RAMIE 2 -7. Model MB -P2 — Control Head Mounting Bracket. TO RELEASE FIRE g 002846PC SUPPRESSION SYSTEM MO C*JA ► IMIN TTE 1 :47 -254: U I- CAUTION 7, Do not screw the control head directly to a wall as this ( will warp the control head, not allowing the mecha- nism to actuate. Figure 2 -6. Electric Control Head. 004789PC MODEL NMCH3 - MECHANICAL MODEL PDA -D2 PNEUMATIC CONTROL HEAD ACTUATING ADAPTOR The Model NMCH3 Mechanical Control Head is a fully The Model PDA -D2 Pneumatic Actuating Adaptor is used to mechanical control head which can be connected to the open the cylinder valve when the system is actuated. It PCI- 15/25s/35/50s/70 cylinder valve. This control head will must be installed on the valve of each cylinder unless a support a fusible link detection system, a remote mechani- control head has been mounted on the cylinder valve. See cal pull station (Model RPS -M), and a mechanical or electric Figure 2 -7a. ► shut -off valve. A micro switch (Model MS -SPDT, MS -DPDT, MS -3PDT, or MS -4PDT) can be ordered separately and field installed. There is no local manual actuation for the Model NMCH3. The Model NMCH3 control head can actuate a ..maximum of five (5) cylinders. See Figure 2 -6a WOE. f' f lc -43 :Of. ; ?O H_ rI 5 Figure 2 -7a. Model PDA -D2 Pneumatic Actuating Adaptor. _ ► 006886PC Figure 2 -6a. Mechanical Control Head. ► 006843PC ULEX 3437 CEx732 March 17, 2004