Code Alarm SRT 5500 Specifications download pdf (Page 19)

December 2013

REQUEST FOR PROPOSALS FOR

PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES

RFP SRTA-2014-01

TECHNICAL SPECIFICATIONS

PAGE-19



system shall be equipped with drain cocks. Air vent valves shall be fitted at high points in the cooling

system unless it can be demonstrated that the system is self-purging.



EMP, or approved equal, electric fan cooling system is required. Electric fans shall be

brushless, variable speed, reversible and have a corrosion resistant metal shroud with

finger guards. The fans should provide electronic feedback control and have diagnostics

capability through the standard SAE J1939 diagnostics port. The cooling system shall consist of

multiple electric DC brushless pusher type variable speed fans with electronic feedback controls.

Electric fan motor speeds shall have a minimum operating range of 0-5500 rpm with capability of

manual or automatic reverse operation in order to assist in debris removal. The cooling

system shall be equipped with a master controller with the following capabilities; automatically

reduce fan speed when the vehicle stops to minimize noise at the curbside, communicate on

the J1939 CAN data link with system diagnostic retorting via DM1 messaging, review and

download data via a laptop with service tool software, capable of software and calibration up-

dates, receive commands from the engine or transmission ECM, report fault codes by lighting a

engine compartment LED flashing light, sense engine compartment temperature and activate

fans if maximum temperature is exceeded, collect and store cooling system and vehicle

performance histogram data. If fans lose communication with the engine or sensors they shall

go into a default speed mode to avoid vehicle shutdown. This communication shall use the

industry standard RP1210 compliant datalink adapters connected via the standard 9-pin

diagnostic connector found in the engine compartment and interior of the bus. Independent

diagnostic detection shall be capable of identifying specifically which fan, measured input

parameter, or datalink input parameter is experiencing a fault condition. Report both active and

previously active fault codes with the number of detections/occurrences, time of the first and

most recent fault detection, and cumulative time the fault was active. Where electric fans are

used for cooling there shall be ample field experience. As a minimum, 50 electric fan based

cooling systems shall be in transit revenue generating operation for at least 2 years.



A sight glass to determine satisfactory engine coolant level shall be provided and shall be accessible

by opening one of the engine compartment's access doors. A spring-loaded, push button type valve

to safely release pressure or vacuum in the cooling system shall be provided with both it and the

water filler no more than 60 inches above the ground and both shall be accessible through the same

access door.



12.2 Radiator



The radiator, and charge air cooler if integrated, shall be of durable corrosion-resistant construction.

Radiators with copper/brass construction shall be fitted with bolted-on removable tanks. Brazed

aluminum radiators shall have welded cast tanks. Automotive crimped-on tanks are more susceptible

to leaks and early failure, and shall not be used. The radiator shall be designed so a mechanic can

gain access to a substantial portion of the side facing the engine for the purpose of cleaning the

radiator in five minutes or less.



Radiators shall have a fin density 10 fins per inch or less and shall not have louvered/slit designs.

These are more susceptible to clogging and deteriorating cooling performance over time and shall

not be used. Radiators shall utilize a bar and plate design so they are robust and can be cleaned with

high pressure spray wash.



For certain severe environments, a secondary cooler may be used to increase the ambient

temperature capacity for a cooling system. The secondary cooler shall be remote mounted, but below

the coolant surge tank. Air flow should be provided with brushless electric fans. If an application

requires a boost pump to maintain coolant flow to the secondary cooler, a brushless electric water

pump shall be used.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 86 87

Comments to this Manuals

No comments

Code Alarm SRT 5500 Specifications Page 19

Comments to this Manuals

Related products and manuals for Car alarm Code Alarm SRT 5500