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Chapter 2 — Components <br /> Page 2 -9 <br /> REV. 3 <br /> ELECTRICAL SWITCHES See NFPA 72, "National Fire Alarm Code," Initiating Devices <br /> section, for the correct method of wiring connection to the fire <br /> The electrical switches are intended for use with electric alarm panel. <br /> gas valves, alarms, contactors, lights, contractor supplied <br /> electric power shut -off devices and other electrical devices MODEL SM- 120/24 SOLENOID <br /> that are designed to shut off or turn on when the system is MONITOR <br /> actuated. <br /> Switches are available in kits: One Switch Kit, Part No. The Model SM-120/24 solenoid monitor is used in conjunc- <br /> 551154; Two Switch Kit, Part No. 551155; Three Switch Kit, tion with the Model ECH3 control head to supervise the <br /> Part No. 551156, and Four Switch Kit, Part No. 551157. actuation and detection circuits. In the event of a problem in <br /> Mounting hardware and 12 in. wire assemblies are provided the circuit, a light on the monitor goes out. The Model <br /> with each kit. Each switch has a set of single pole, double- SM -120 is used with the Model ECH3 -120 control head. The <br /> throw contacts rated: Model SM -24 is used with the Model ECH3 -24 control head. <br /> Two sets of NO /NC dry contacts are provided. The unit <br /> UL /cUL /CSA Rating ENEC Rating mounts directly to a three gang wall outlet box. The Model <br /> 250 VAC, 21A Resistive IE4T105p Approved SM -120 acts as a reset relay when used with an electric <br /> 250 VAC, 2 HP 250V, 21A Resistive gas valve. Electric gas valve wiring instructions are provided <br /> 125 VAC, 1 HP 8A Motor Load in the installation section of this manual. See Figure 2 -21. <br /> COMMON N.O. <br /> (RED) (BLACK) e s 0 <br /> Y PVrc .rerr Sol noh Mon tor <br /> 0 N.C. i 'tc °! <br /> (BROWN) e e, 0 <br /> r l <br /> 1 1 II <br /> Figure 2 -20a. Model MS -DPDT Micro Switch. is �. <br /> 001612 _ aims <br /> The Alarm Initiating Switch Kit, Part No. 550077, can be field <br /> mounted within the control head. This switch must be used ` 1 <br /> I to close a supervised alarm circuit to the building main fire 0 0 <br /> alarm panel when the control head actuates. This action will I. <br /> signal the fire alarm panel that there was a system actuation 714I� <br /> in the hazard area. The switch kit contains all necessary 4 � !� _♦ • <br /> ler mounting components along with a mounting instruction <br /> sheet. The switch is rated 50 mA, 28 VDC. 0 0 0 <br /> r s. <br /> SPACER <br /> Figure Fi 2 -21. Model SM- 24/120 Solenoid Monitor. <br /> TOWARD REAR OF WHEN SPACER AND g 002860PC <br /> CONTROL HEAD R SWITCH ARE PROPERLY <br /> \ MOUNTED, THIS DIVIDER <br /> MUST BE BETWEEN THE <br /> \� ` N.O. AND N.C. TERMINALS <br /> ^ <br /> COM <br /> \ S \ A N.O. <br /> '''''''I' rIIIPA:* .\ N.C. <br /> Figure 2 -20b. Alarm Initiating Switch. <br /> 004890 <br /> ULEX 3437 CEx732 <br /> September 1, 2006 <br />