AIR CONDITIONING SPECIFICATIONS
"Manufacturer" – References to “manufacturer” in this section refer to the "A/C Equipment Manufacturer". “Contractor”- References to “contractor” in this attachment refer to the company responsible for the temperature reduction test. “Vendor” - Company selling the bus.
This is a performance specification. A test must be performed by the vendor, unbiased, independently certified, and documented by a third party capable of performing the testing procedures as outlined below for each series of buses. (Certified in-house testing facility may be acceptable.) Tests shall be performed at the expense of the vendor. All tests performed shall be demonstrated to the satisfaction of the DPS Specifications Committee. The purchaser or Committee must be able to replicate the test and results. However, if the A/C system presented does not pass after 3 tests, the manufacturer shall supply another system to meet the requirements.
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SERIES OF BUSES TO BE TESTED Type A Type C & D Type C & D Type C & D
THIS TEMPERATURE DIFFERENTIAL SHALL BE HELD UNDER THE FOLLOWING CONDITIONS:
Air conditioning system will be designed to operate at 110 º F, 50% humidity, and full sunshine.
All doors and vents closed and under a steady state condition.
All interior bus temperature measurements must fall within the comfort range of 30 º F cooler than outside ambient temperature, plus or minus 3 º F.
AIR CONDITIONING TEST
The Contractor will test the air conditioning system by placing the Manufacturer’s bus in a heat booth or similar surroundings, then heat saturate the entire bus (interior) such that the interior of the bus shall have a maximum temperature of 110º F and a minimum of, no less than, 100º F. The bus shall be heat saturated for a minimum of two (2) hours. Inside temperatures are measured at the three (3) described locations as stated below.
The A/C system shall be manually controlled from the driver’s area. The air conditioning system must be capable of lowering the inside temperature from 110 º F maximum (100 º F minimum) and a humidity rating no less than fifty percent (50%) to a comfort range of 30 º F cooler than the outside ambient