Monitored safety inputs: 3 Main Board 3 Expansion Board.
Temperature specs: Without Heater: -4°F (-20°C) to 140°F (60°C). With optional heater (HTRNB: HTR460 for 460V operators): -40°F (-40°C) to 140°F (60°C)
K20-8100M-DC is a 1HP Motor Replacement Kit (90VDC BM CF). For use with various LiftMaster® 1HP 1-Phase Commercial Door Operators and Gate Operator Systems
Gear and sprocket assembly for belt drive units after 2002.
Assembly includes: Spring washer thrust washer retaining ring bearing plate two roll pins drive gear and worm gear helical gear with retainer and grease.
May be used in two different ways; as an OPEN only control (all LiftMaster operators) or as an OPEN/CLOSE control (only LiftMaster operators with types B2 and S2 control wiring). In the latter case pulling the cord will open a fully closed door close a fully opened door and reverse a closing door.
Pulling the cord whlie the door is opening will either have no effect (type B2 wiring) or will stop the door (Solid State Logic Control Board).
WARNING: When used on most industrial operators this control will not stop the door. Use another control that has a STOP button in conjunction with this control.