
Norton® is a registered trademark of Yale Security Inc., an ASSA ABLOY Group company. Copyright © 2002, 2013, Yale Security Inc., an ASSA ABLOY Group company. All rights reserved.Reproduction in whole or in part without the express written permission of Yale Security Inc. is prohibited.
3000 Highway 74 East • Monroe, NC 28112Tel: (877)- • Fax: (800)-338-0965www.nortondoorcontrols.com974-2255
ASSA ABLOY
Unit AdjustmentOpening Door ControlsFigure 4BackcheckFigure 5
1/8"HexKey
IncreaseDecreaseOpening Cycle
1/8"HexKey
Opening Door Control (Figure 4.)• Backcheck ("B") valve controls the hydraulic resistance to door opening. NEVER close this valve completely – it is not to provide a positive stop.• Backcheck position ("P") valve controls the door angle where backcheck cushioning starts. Valve normally closed.
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Backcheck CushionBackcheck PositionOpen for backchecklater in door-openingcycle.Closing Speed ControlsClosing Speed ControlsFigure 2Figure 32B2A
1/8"HexKey
SlowFast"L" (Latch)"L" (Latch)"S/D” (Sweep)"S" (Sweep)"S/D" (Delayed Action)StandardClosing CycleDelayed ActionClosing CycleClosed
10°
70°
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Closed
10°
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Standard CloserDelayed ActionCloserAll ValvesDo not force valvescounter-clockwise outof closer body or a fluidleak will occur.Do not force valvescounter-clockwise outof closer body or a fluidleak will occur.Closing Power ControlFigure 1Install closer per instructionswith the proper pre-load applied to the arm then adjust spring power. The power adjustment will notwork properly if the closerspring is not pre-loaded.To increase power, use 11/16"wrench to turn poweradjustment nut clockwise.To decrease power, turn nutcounter clockwise. DO NOT use a power drill or driver to turn adjustment nut. This will damage closer and void warranty.For PR7570 OnlySet closer to desired size. For recommended sizes, refer to the Power Adjustment Chart on page 2.80-9377-0621-020 (03-13)Page 4"P"(Normally Closed)"B"(NEVER CloseCompletely)+
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