{"title":"Selden Electric Furling Mast RD Mk II — Owner's Manual","description":"\u003clink rel=\"stylesheet\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/om-manual-v2.css\"\u003e\u003cstyle\u003e.mpom .om-tbl.nw td+td{white-space:nowrap}.mpom details.om-dd{position:relative;margin:0}.mpom details.om-dd\u003esummary{list-style:none;cursor:pointer}.mpom details.om-dd\u003esummary::-webkit-details-marker{display:none}.mpom .om-dd-menu{position:absolute;left:0;top:calc(100% + 6px);min-width:100%;width:max-content;max-width:360px;background:#fff;border:1px solid #e3e5e8;border-radius:6px;box-shadow:0 8px 24px rgba(0,0,0,.14);z-index:30;padding:6px}.mpom .om-dd-menu a{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:10px 12px;border-radius:4px;font-size:14px;font-weight:600;color:#2a2b2a!important;text-decoration:none!important}.mpom .om-dd-menu a:hover{background:#f5f6f8}.mpom .om-dd-menu small{font-weight:400;color:#5f6368;white-space:nowrap}\u003c\/style\u003e\u003cdiv class=\"mpom\"\u003e\n\u003cdiv class=\"om-head\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"om-tag\"\u003eOWNER'S MANUAL\u003c\/span\u003e\u003cp class=\"om-lead\"\u003eUser guide for the Selden RD Mk II electric furling mast (RD electric furlin gears from 2024, item numbers 540-294-XX and 540-301-XX), synchronized with an electric outhaul winch (SMF) or a hydraulic outhaul (HPS).\u003c\/p\u003e\n\u003cdiv class=\"om-box\"\u003e\n\u003cdiv class=\"om-row\"\u003e\n\u003cspan\u003eDocument\u003c\/span\u003e\u003cb\u003eSelden Electric Furling Mast RD Mk II Owner's Manual\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-row\"\u003e\n\u003cspan\u003eFormat\u003c\/span\u003e\u003cb\u003ePDF · 20 pages · 4.0 MB\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-row\" style=\"border-bottom:0\"\u003e\n\u003cspan\u003eLanguage\u003c\/span\u003e\u003cb\u003eEnglish\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-acts\"\u003e\u003ca class=\"om-btn dl\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/Selden-Electric-Furling-Mast-RD-MkII-User-Guide.pdf\" target=\"_blank\" rel=\"noopener\"\u003e\u003csvg viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.4\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 4v11\"\u003e\u003c\/path\u003e\u003cpath d=\"m7 10 5 5 5-5\"\u003e\u003c\/path\u003e\u003cpath d=\"M5 20h14\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Download PDF\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-toc\"\u003e\n\u003ca href=\"#om-system\"\u003eSystem\u003c\/a\u003e\u003ca href=\"#om-config\"\u003eConnection \u0026amp; Setup\u003c\/a\u003e\u003ca href=\"#om-prep\"\u003eBefore Sailing\u003c\/a\u003e\u003ca href=\"#om-sailing\"\u003eFurling \u0026amp; Unfurling\u003c\/a\u003e\u003ca href=\"#om-manual\"\u003eManual Operation\u003c\/a\u003e\u003ca href=\"#om-trouble\"\u003eTroubleshooting\u003c\/a\u003e\u003ca href=\"#om-products\"\u003eProducts\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-img\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/files\/Selden-Electric-Furling-Mast-RD-MkII-User-Guide-Cover.png\" alt=\"Selden Electric Furling Mast RD Mk II — Owner's Manual\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-system\"\u003e\n\u003ch2 class=\"om-h\"\u003eSystem Overview\u003c\/h2\u003e\n\u003cp\u003eThe drive unit (mast motor, clutch assembly with two clutch plungers, emergency gear) runs on the Selden power supply and SEL-Bus system: the mast motor connects to its own motor control unit (MCU) – furling mast – which talks over SEL-Bus to the outhaul (electric winch MCU for SMF, or the HPS hydraulic outhaul) and to the OUT \/ IN buttons. Part and serial numbers are on the aft side of the motor facing the sail groove; quote them with the mast ID in any support case.\u003c\/p\u003e\n\u003cdiv class=\"om-tbl nw\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMast motor\u003c\/th\u003e\n\u003cth\u003eIN\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak torque (Nm)\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax power, full torque (W)\u003c\/td\u003e\n\u003ctd\u003e1000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull load current* 12V \/ 24V (A)\u003c\/td\u003e\n\u003ctd\u003e100 \/ 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal current* 12V \/ 24V (A)\u003c\/td\u003e\n\u003ctd\u003e40 \/ 20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003e* Incl. MCU and PSU.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClutch plungers switch between ELECTRIC and MANUAL; both in their lower position for electric operation.\u003c\/li\u003e\n\u003cli\u003ePower off during electrical installation and whenever the system is not in use. Watch the whole furling process and stop immediately on any malfunction; keep clear of the sail groove, winches and moving parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-config\"\u003e\n\u003ch2 class=\"om-h\"\u003eConnection \u0026amp; Button Configuration\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConnect the three control cables to the furling-mast MCU in the right sequence: L1 brown, L2 orange, L3 grey. Wrong positions can damage the motor and brake. Full installation and MCU configuration: Selden manual 597-275-E.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWith synchronized hydraulic outhaul cylinder (HPS):\u003c\/b\u003e press the configuration button on the furling-mast MCU, then push and hold IN until the motor gives its start-up signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWith synchronized winch (SMF) – in this order:\u003c\/b\u003e (A) configuration button on the winch MCU, hold winch button 1 or 2 until the winch signals; (B) configuration button on the winch MCU, hold MAIN OUT until the winch signals; (C) configuration button on the furling-mast MCU, hold IN until the mast motor signals.\u003c\/li\u003e\n\u003cli\u003eA signal tone at power-up with no button pressed means the push-button cables from the SEL-Bus converter are wired normally closed: switch off and rewire them normally open.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-prep\"\u003e\n\u003ch2 class=\"om-h\"\u003ePreparations Before Sailing\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eLuff extrusion tension:\u003c\/b\u003e lift \/ disconnect the locking tube from the tack assembly, grip the luff extrusion by hand at the upper access hole, disconnect the motor and tension the luff profile with the emergency winch function until you can no longer stop the extrusion turning by hand. Never use the motor for this – risk of injury.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlways release backstay tension before adjusting the luff extrusion\u003c\/b\u003e, or its joints can be damaged when the backstay is eased.\u003c\/li\u003e\n\u003cli\u003eTune with limited prebend (Selden Hints and Advice 595-540-E).\u003c\/li\u003e\n\u003cli\u003eOuthaul car stop: start 500 mm from the aft mast wall and adjust; too far aft keeps the foot tighter than the leech and can jam the head of the sail.\u003c\/li\u003e\n\u003cli\u003eKeep the outhaul routing low-friction and replace worn blocks – the synchronized winch limits force at the winch, so friction reduces clew force and spoils synchronization.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-sailing\"\u003e\n\u003ch2 class=\"om-h\"\u003eFurling \u0026amp; Unfurling\u003c\/h2\u003e\n\u003cp\u003eBefore either: sail upwind, ease a very tight backstay to straighten the mast, set the boom angle with the vang \/ topping lift so the leech is tight and battens parallel to the mast, ease the mainsheet. Don't reef to where battens ride on the sail slot.\u003c\/p\u003e\n\u003cdiv class=\"om-grid2\"\u003e\n\u003cdiv\u003e\n\u003ch3 class=\"om-h3\"\u003eUnfurling with synchronized winch (SMF)\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSecure the outhaul on the synchronized electric winch.\u003c\/li\u003e\n\u003cli\u003ePress MAIN OUT; the winch gives a short warning signal and starts.\u003c\/li\u003e\n\u003cli\u003eHolding MAIN OUT, press the second button for more speed.\u003c\/li\u003e\n\u003cli\u003eFull sail: keep the button(s) pressed – it stops automatically. Reduced area: release at the position you want.\u003c\/li\u003e\n\u003cli\u003eTrim the outhaul with the winch buttons if needed (full winch power).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3 class=\"om-h3\"\u003eUnfurling with a non-synchronized electric winch\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eSecure the outhaul on the winch, not over-tensioned (the brake may not unlock).\u003c\/li\u003e\n\u003cli\u003ePress MAIN OUT and wait 3 seconds.\u003c\/li\u003e\n\u003cli\u003eHolding MAIN OUT, press the winch button; MAIN OUT + MAIN IN together for more speed. If you let go, press MAIN OUT first to resume. Don't let the winch overload the sail.\u003c\/li\u003e\n\u003cli\u003eFull sail: the mast motor stops itself – release the winch button, then the mast buttons. Reduced area: winch button first, then mast buttons.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3 class=\"om-h3\"\u003eFurling\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFree the outhaul but keep it tensioned (about one turn on the winch); press MAIN IN and ease the outhaul as the sail goes in.\u003c\/li\u003e\n\u003cli\u003eHolding MAIN IN, press MAIN OUT for more speed.\u003c\/li\u003e\n\u003cli\u003eRelease at the area you want or when fully furled.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"om-note\"\u003eThe motor does NOT stop automatically when furling in: run the last turns slowly and watch the outhaul block so it isn't pushed into the sail groove.\u003c\/p\u003e\n\u003ch3 class=\"om-h3\"\u003eManual outhaul with electric mast motor\u003c\/h3\u003e\n\u003cp\u003eHold MAIN OUT: the motor pauses unless the outhaul is pulled, and turns as you pull it by hand. Releasing OUT sets the brake. At the end of unfurling the motor makes a short turn to set the brake.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block om-grid2\" id=\"om-manual\"\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eSwitching to Manual\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003ePower off. Insert the emergency handle on the starboard side of the mast; turn it either way while pulling the upper lever (A) aft and up – up to 10 turns may be needed for the clutch to engage. The luff profile is now driven from the handle socket through a worm gear.\u003c\/li\u003e\n\u003cli\u003eDisconnect the electric drive: pull the lower lever (B) aft and up while turning the handle slightly clockwise to unload it.\u003c\/li\u003e\n\u003cli\u003eFurl in or out with the handle. The gear ratio is high, so it takes many turns – a power tool with a 1\/2\" socket is a good option.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch2 class=\"om-h\"\u003eReconnecting the Electric Drive\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTurn the handle either way as you pull the lower lever (B) aft and up (as printed); up to 10 turns may be needed for the clutch to engage.\u003c\/li\u003e\n\u003cli\u003ePull the upper lever (A) aft and down while turning the handle slightly clockwise to unload the manual gear.\u003c\/li\u003e\n\u003cli\u003eWith both levers (A and B) in their lower positions the sail is controlled by the electric drive.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"om-block\" id=\"om-trouble\"\u003e\n\u003ch2 class=\"om-h\"\u003eTroubleshooting \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cdiv class=\"om-tbl nw\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProblem\u003c\/th\u003e\n\u003cth\u003eCause\u003c\/th\u003e\n\u003cth\u003eAction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor stutters, unfurling doesn't work\u003c\/td\u003e\n\u003ctd\u003eControl cables wrongly placed in the MCU\u003c\/td\u003e\n\u003ctd\u003eCorrect the cable positions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstant tone at power-up, or motor runs at power-up and stops when MAIN OUT\/IN is pressed\u003c\/td\u003e\n\u003ctd\u003ePush-button cables wired normally closed\u003c\/td\u003e\n\u003ctd\u003eRewire normally open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSynchronized unfurling not smooth \/ top of sail jams\u003c\/td\u003e\n\u003ctd\u003eLuff tension, rig tune, outhaul car position or routing\u003c\/td\u003e\n\u003ctd\u003eSee the preparations above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnfurling unusually slow in the cold\u003c\/td\u003e\n\u003ctd\u003eCold motors\u003c\/td\u003e\n\u003ctd\u003eDisconnect the motor from the manual gear, take the outhaul off the winch, idle-run the mast motor IN at least 30 sec and the winch on high speed at least 30 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAnnually:\u003c\/b\u003e remove the screw over lubrication hole A (via the sail opening, or by removing the motor cover on layouts that have one – mast straight and rig tension released), apply WD-40 while turning the mast motor at least one turn, refit the screw.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEvery 5th year:\u003c\/b\u003e professional service of the mast motor by an authorized Selden dealer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"om-note\"\u003eNeed a part that isn't listed? \u003ca href=\"\/pages\/contact\"\u003eAsk us to source it\u003c\/a\u003e and quote the part number from the PDF.\u003c\/p\u003e\n\u003ch2 class=\"om-h\" id=\"om-products\"\u003eProducts in this Manual\u003c\/h2\u003e\n\u003c\/div\u003e","products":[],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0879\/4908\/2930\/collections\/Selden-Electric-Furling-Mast-RD-MkII-User-Guide-Cover.png?v=1792516495","url":"https:\/\/www.mauripro.com\/collections\/owners-manuals-selden-electric-furling-mast-rd.oembed","provider":"MAURIPRO Sailing","version":"1.0","type":"link"}