Specifications

Loveland Fire/Rescue
Pumper
Production Specification
SVI #769 Page 93 of 125 June 17, 2010
..\4) Pricing & Change Orders\Production Change Order.pdf
12 VOLT MULTIPLEX CONTROL CENTER
The apparatus shall have a multiplexed 12 volt electrical system that will provide complete diagnostic capability. The
system shall have the capability of delivering multiple signals via a CAN bus, utilizing specifications set forth by SAE
J1939. The system shall be node based to maximize stability so that failure of one node does not affect the operation of
the other nodes. The system shall use shielded twisted-pair wire for transmission of system function signals. The shielded
wire shall provide protection against EMI and RFI noise interruptions.
The multiplex system shall be responsible for providing power management functions as well as load shedding. The
warning light system shall be controlled by the multiplex system. The system shall be capable of displaying text and/or
graphic messages on a display module. The system shall be based on solid-state technology and shall include self-
contained diagnostic indicators.
BATTERY SYSTEM
The battery connectors shall be heavy duty type with cables terminating in heat shrink loom. Heavy duty battery cables
shall provide maximum power to the electrical system. Where required, the cables shall be shielded from exhaust tubing
and the muffler. Large rubber grommets shall be provided where cables enter the battery compartment.
Batteries shall be of the high-cycle type. With the engine off, the battery system shall be able to provide the minimum
continuous electrical load for 10 minutes without discharging more than 50 percent of the reserve capacity and then to
restart the engine. The battery system cold cranking amps (CCA) rating shall meet or exceed the minimum CCA
recommendations of the engine manufacturer. The batteries shall be mounted to prevent movement during fire apparatus
operation and shall be protected against accumulations of road spray, snow, and road debris. The batteries shall be
readily accessible for examination, testing, and maintenance.
A means shall be provided for jump-starting the engine if the batteries are not accessible without lifting the cab of a tilt-cab
apparatus.
Where an enclosed battery compartment is provided, it shall be ventilated to the exterior to prevent the buildup of heat
and explosive fumes. The batteries shall be protected against vibration and temperatures that exceed the battery
manufacturer’s recommendation.
A master load disconnect switch shall be provided between the starter solenoid(s) and the remainder of the electrical
loads on the apparatus. The starter solenoids shall be connected directly to the batteries.
Electronic control systems and similar devices shall be permitted to be otherwise connected if so specified by their
manufacturer.
The alternator shall be wired directly to the batteries through the ammeter shunt(s), if one is provided, and not through the
master load disconnect switch.
A green “battery on” pilot light that is visible from the driver’s position shall be provided.
A sequential switching device shall be permitted to energize the optical warning devices and other high current devices
required in minimum continuous electrical load, provided the switching device shall first energize the electrical devices
required in minimum continuous electrical load within five (5) seconds.