Siemens PDM-3 Operating Instructions Air Duct Pressure Differential Meter

THIS KIT CONTAINS DESCRIPTION DIFFERENTIAL HOSE 54 INCHES ADAPTER 315 085535 5 Instruct Instruct Instruct Instructions Instruct PDM 3 Duct Pressure Differential Meter Safety Building Technologies Inc Fernwood Road Park New Jersey 07932 315 085535 5 Building Technologies Ltd Kenview Boulevard Ontario L6T 5E4 CN INSTRUCTIONS Differential Measurements between and Return Tubes Using the PDM 3 Series 3 XL3 Air Duct Detectors procedure describes the proper method of verifying that the pressure differential between the Series 3 XL3 duct inlet tube and outlet sampling tube is between 01 and 1.0 inches of water column Remove the air duct detector cover and the detector Ensure that the DA 3 housing and its sampling and return tubes are properly installed and oriented on the air Remove the pressure differential guage Item A the rubber tubing adapters Item C and the flexible hoses Connect one flexible hose to the high pressure port of the gauge and the other hose to the low pressure port of facility See Step 9 below B from the carrying case gauge Slide the metal connector of the rubber tubing adapter Item C into the other end of each flexible hose Be that the hose ends are completely seated at each end connection to ensure a proper seal Mount the gauge to a vertical magnetic surface as close to the DA 3 housing under test as possible The on the back of the gauge will stabilize the meter that the indicating pointer is near the zero mark If the pointer is less than one division away from the mark proceed to Step 7 below If the pointer is more than one division away from the zero mark the meter give an inaccurate indication possibly because the mounting surface is not vertical Correct this condition proceeding Attach the open stopper end of each assembled flexible hose to the DA 3 housing sample tube port Connect the tubing from the high pressure port of the gauge to the sampling tube closest to the wiring compartment of the DA 3 housing and connect the tubing from the low pressure of the gauge to the sampling tube away from the electrical wiring compartment of the DA 3 With air flowing through the duct the reading should be between 01 inch and 1.0 inches of water column The of the meter represent 025 inch of water column at each graduation measured between 0 and 1.0 and 05 inch of water column measured between 1.0 inch and 1.5 inches the meter reading is not between 01 inch and 1.0 inches of water column any of three conditions a b or c exist The sampling tubes are not oriented correctly or The air velocity in the duct is below 400fpm or The air velocity in the duct is above 4000fpm correct sampling tube orientation can be found in Figure 8 of the Series 3 XL3 Air Duct Manual P N 315 If the sampling tubes are misoriented correct the orientation and repeat the pressure Remove flexible hose assembly and the equipment Reassemble the air duct detector and cover Securely the cover with fastening screws Do not overtighten as that may result in air leakage around the edges the cover 315 085535 5