DMV Abstract for out of state license: An original out of state driver record that is dated no more than 90 days from the date the application is filed. NYSDMV 6 hour Defensive Driving Course: Temporary receipt or Official Certificate of course completion within three (3) years prior to filing an application.
Print Page. What It Is. A direct expansion air conditioning (DX) system uses a refrigerant vapour expansion/compression (RVEC) cycle to directly cool the supply air to an occupied space. DX systems (both packaged and split) directly cools the air supplied to the building because the evaporator is in direct contact with the supply air,
Basic Cooling Cycle. The basic cooling cycle is the same for both vapor-compression and absorption chillers. Both systems utilize a liquid refrigerant that changes phase to a gas within an evaporator which absorbs heat from the water to be cooled.