The Retrozone RZ135-7 24 vac 3 wire damper motors are designed as upgrades for your 2 wire spring return dampers - gets rid of failure-prone, hot, spring return motors. The RZ135-7 is an upgrade for Honeywell's M847D series motors on popular ZD and ARD dampers, including M847D1004, M847D1012, and other M847D series motors. Due to the high failure rate of Honeywell, Trol A Temp, ARD, Jackson HD and D XX series, Zone First, RobertShaw, EWC, Trol A Temp RDMZ and ARD, Hansen, Synchron, and other motors using this common footprint motor, this is the upgrade you need - it de-powers itself when fully open or closed, and uses no power and no spring. These motors also replace most Honeywell 2 wire normally open, power to close spring return motors, as well as many other brands; and also replace the Hansen 135-6 motor, as well as other brands with the same footprint. Note: This motor will require 3 wires from your current zone control panel to the motor. All Honeywell, Trol A Temp, EWC, Durozone, Ecojay, and most zone panels offer a 3 wire damper output. Using this motor is as simple as connecting the third wire from the unused damper terminal, often marked NO, M4, or Norm open. You can message us via with any questions. The same footprint used by almost all brands. Replaces many 2 wire Spring return motors with a "common footprint" design as shown in the pictures, with 1.33 or 1 and 5/16 inch center shaft to shaft spacing. Some "new construction" type panels only offer a 2 wire output, but you can still use this 3 wire motor - message us via for an interface relay.
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1 week ago
1 week ago