Return-Path: Received: from wind.imbris.com ([216.18.130.7]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Wed, 11 Oct 2000 10:09:58 -0400 Received: from regandesigns.com (nortel131-52.imbris.com [216.18.131.52]) by wind.imbris.com (8.9.3/8.9.3) with ESMTP id HAA09025 for ; Wed, 11 Oct 2000 07:14:40 -0700 (PDT) Message-ID: <39E45A2B.6E0CA0C@regandesigns.com> Date: Wed, 11 Oct 2000 07:16:43 -0500 From: Brent Regan To: Lancair List Subject: Re: Door Seal Pump X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> If the door seal pressure is set too high the pump will cycle at altitude. This is because the the pressure can be set higher than the ambient pressure (at altitude) times the pump's "compression ratio". The door seal pressure can be adjusted by turning the small slotted screw in the center back of the pressure switch. BTW, this adjustment is also available for the hydraulic pressure switch. One other tip. Attach an aquarium fine air stone to the inlet to the door seal pump to act as a filter. Be sure to clean the stone with compressed air before installing. Dust and dirt in the check valve will reduce system performance. A properly operating system should cycle no more than once every 5 minutes or so. Regards Brent Regan >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>