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#12465 - 10/23/14 04:45 AM
Re: Otis 6970 door operators
[Re: jkh]
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Joined: Aug 2011
Posts: 563
uppo72
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Joined: Aug 2011
Posts: 563
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As Rolly suggested these operators are pretty good. Use 10w-30 which should help with temp variation. As suggested the horizontal screw set at the vertical setting is the shortest setting distance from fully open/close. The vertical screw is the intensity setting( how hard it stops). If your doors are slamming, check your oil(even replace it) and make sure you cycle your doors to make sure the levels are right as it needs more to fit into all areas of the gear box. Then set horizontal screw to horizontal as its a good medium setting. Then screw the vertical all the way in. This is a preliminary adjustment and a good starting position. Adjust then to suit doors. If it still slams something else is going on, either supply volts or you have a oil leak in the gear box.
You also mentioned changing to new PDO's. I have found that you can have a lot of trouble finding the right PDO as these old doors are very heavy and the new VVVF's find it hard to pull them up quick enough. More door adjustments tend to have to be made to get them right, even changing car doors. Rolly also talked about transistor shorting making doors fly open/close dangerously. I have had this with Montgomery PDO's where the Darlington resistors shorted and no matter what adjustments were made it didn't make any difference.
Last edited by uppo72; 10/23/14 04:49 AM.
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