COMPLIANCE INFO_2021 - Laserfiche WebLink

Home Browse Search

CARB Approved IOM 12 - ARID Permeator AT-150 -VR-201-Z /VR-202-Z Configuration of the Set-points is done at the Factory. The CPT should verify at Control Panel installation and power up that the P hi and P to set points are properly configured. The vacuum pump will remain off until the underground storage tank pressure again increases to the P hi, and the above cycle repeats. The tightness of the station is continuously monitored by both the Veeder-Root ISD System installed at the GDF and ARID's own pressure sensor/transmitter. If pressure vs. time plots exceeding the P hi set point are consistently observed, the PERMEATOR unit is not operating properly. Also, if the pressure plots do not show rapid pressure reduction once the unit is actuated at the P hi threshold, the vapor feed path may be restricted. Vacuum Pump Motor Rotation Having made the appropriate tests and connections, it is very important to test the direction of the rotation of the vacuum pump. This is done by quickly switching the unit on and off(E, Figure 2) and observing the rotation of the vacuum pump motor. If the motor is spinning in the direction indicated by the arrow on the housing of the vacuum pump --clockwise, everything is fine. If the direction is opposite the arrow, it must be changed immediately to avoid damaging the vacuum pump. The direction is changed by switching two of the leads within the L1, L2, L3 power strip in the electrical control cabinet or switching two wires within the electrical junction box mounted to the motor housing in the main cabinet. A quick means of determining proper rotation is to place a piece of paper in close proximity to the vacuum pump cooling fan cage. If the paper is sucked into the fan cage, the motor rotation is correct. PERMEATOR System Details Piping Piping should incorporate minimum of 2"diameter corrosion resistant steel for all vapor carrying conduits. For installations at grade or slightly above ground level, please ensure that PERMEATOR connections are made in accordance with manifold or non-manifold storage tanks. Please note that a CPT should be present during installation to ensure proper practices are being carried out (Key factors are feed and return tanks properly identified, manifold vents, isolation ball valves, and pressure vacuum valve installation). Before operating the system in unattended mode and initiating start-up of the unit, a CPT should ensure that the PERMEATOR connections are properly made for Feed, Return and Exhaust lines and that the unit and piping are adequately mounted and secured in place. The isolation ball valves must be opened to allow feed flow to the unit and permeate return flow from the unit and vapor carrying piping should meet minimum slope requirements. The station vent piping should be leak tight and use at least one p/v valve listed as CARB approved for Feed connection(s) and Return connection. TP 201.2 back pressure and TP 201.3 pressure decay test results should conform to acceptable standards published by CARE. 13