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• <br /> • <br /> Component Description <br /> 2-2.1.6 MICROSWITCH KIT,P/N B120039,B120039-501 (FOR UCH) <br /> The Microswitch Kit is a single pole,double-throw switch(see Figure 2-20 and Table 2-7).Included <br /> in the kit is the microswitch,pigtail assembly and four mounting screws(two short and two long). <br /> Note: Microswitch Kit P/N B 120039-501 includes pigtail assembly with white stripes. <br /> The wire leads are 24-inches(610 mm)in length.Four Microswitch Kits can be mounted in the UCH <br /> Control System. There are two mounting locations to accommodate the four Microswitch kits (two <br /> stacked at each mounting location),with EMT ports for each mounting location.This allows for the <br /> use of two electrical junction boxes for separation of signal lines and AC lines. <br /> These are used when it is necessary to open or close electrical circuits.The following are examples, <br /> but not limited to: <br /> • Electric appliance shutdown <br /> • Make up air shutdown <br /> • Electric gas valve shutdown <br /> • Shuntbreaker/relay <br /> Electrical appliances usually have a higher amp rating than the switches.In this case,such appliances <br /> shall not be wired directly to the microswitch.A magnetic contactor or relay must be used. <br /> To wire the microswitch for UCH,refer to Figure 4-30. <br /> ELECTRICAL CONNECTOR <br /> NC <br /> Q\COM NO <br /> MICROSWITCH <br /> Figure 2-20. Microswitch Kit,P/N B120039 <br /> Table 2-7.Microswitch Electrical Ratings <br /> 125/250 Vac 20.5 Amps <br /> 250 Vac 1-1/2 HP <br /> 125 Vac 1/2 HP <br /> January 2007 2-18 P/N 9127100 <br />