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YZN_ <br />3.2 WIRING MODULE <br />An angled cabinet forward of the rear facing Technician's seat shall house the main <br />bank of electrical components. Solenoids, relays, circuit breakers, etc. shall be on <br />the electrical distribution panel behind a ventilated door measuring approximately 55" <br />high x 18" wide. This door shall hinge on the left side for ease of access for <br />maintenance and repair and shall have a SouthCo flip -latch to secure it in the closed <br />position. Adequate ventilation shall be supplied through two (2) polished metal, <br />louvered vents located near the top and bottom of the door. <br />Y r�N <br />3.3 PORTABLE EQUIPMENT CHARGING CIRCUIT <br />Two (2) additional 12 VDC circuits for charging portable battery powered devices, i.e. <br />Suction units, hand lights, defibrillators, portable radios, etc. shall be provided. These <br />circuits shall prevent discharge of chassis batteries by only permitting the charging of <br />portable devices when the vehicle is either running or the battery conditioner is <br />connected to shore power (operational). This implies that a battery conditioner is <br />required, and may be specified in a different location within these detailed <br />specifications, but is not necessarily being specified within this paragraph. A <br />minimum of 10-amp circuit breaker protection shall be provided for each circuit. <br />These tagged, identified leads shall be located, one (1) in the patient compartment <br />and one (1) in the vehicle cab. These leads shall not be connected to power nor shall <br />they have any connectors attached at either end. These circuits are intended for <br />unspecified future use. <br />Y_ZN <br />3A SEQUENCER/ LOAD MANAGER <br />To prevent excessive loading or load spikes on the electrical generating system at <br />system start up, a sequencer/load manager shall be integrated into the main circuit <br />board for stepped control of the main master emergency functions. The sequencer <br />shall sequence ON or OFF all master emergency functions at 0.5 second intervals. <br />The sequencer/load manager shall sequence specified loads ON, in the following <br />manner: <br />1. Body Warning Lights <br />2. Patient Compartment Dome Lights <br />3. Patient Compartment HVAC <br />4. Front Light Bar <br />5. Intersection and Grille Lights <br />6. Rear Light Bar- if installed <br />7. Wig -Wag Headlights- if installed <br />When a "low voltage" situation is detected, an audible alarm shall sound and an <br />indicator light shall illuminate signaling the situation. When the vehicle transmission <br />is in PARK, the load manager shall shed emergency functions until the system <br />output voltage and the amperage draw of the systems still in operation equalize. <br />When in PARK and the vehicle PARK BRAKE is applied, the Stationary Elevated Idle <br />Control (SEIC) will activate to provide additional voltage for the system. If the "low <br />voltage", 12.0 volts or lower persists, the sequencer/load manager shall initiate the <br />load shedding sequence at each 0.2 volt increment in the reverse order of these <br />emergency functions. <br />99 <br />