Please review these specifications and dimensions carefully to ensure correct fit and function for your application.
SPECIFICATIONS:
• Power Supply: 24 VAC, 50/60 Hz 6 W
• Control: 3-wire on/off
• Angle of Rotation: 90º CAM setting via 2 limit switches. CAM adjustable for 40 - 180º.
• Torque/Speed: 1 N.m. (140 oz. in.)/2.2 RPM at 60 Hz
• Installation: Damper shaft with slot width 4.7 mm
• Shipping Position: Green CAM on close switch
• Life Cycles: 300K
INSTALLATION:
CAUTION - Disconnect power supply before connecting motor wiring to prevent electrical shock or equipment damage.
FOR MULTISIZE (MS) AND STANDARD ROUND (RD) DAMPERS:
1.Prior to replacing your damper motor, be sure to turn off all incoming electrical power.
2. As the wires are disconnected from the current motor, note the appropriate terminal numbers.
3.Remove and discard the existing damper motor, retaining screws.
4. If the Terminal Identification Label currently on the damper does not appear as shown below, use Terminal Identification Label shown below.
5.To mount the replacement motor (if different from the existing motor):
(a) For Multisize (MS) Dampers: Cut out the indicated hole on the Face Plate Diagram and place it onto the Face Plate as shown. Center-punch the holes prior to drilling (#28 drill) as indicated on the Face Plate Diagram. Secure the Replacement Motor with the Large Screws as shown below and reattach the wires per the Termination Identification Label.
Wiring from Panel to Motor:
• M1 or common to Durozone Motor 1
• M4 or norm open (NO) or power to close (PC) to Durozone Motor 4
• R under thermostat input to Durozone Motor 2
Note: on older motors with 5 terminals, 2 and 5 on the old motor were connected, now just use terminal 2.
The above hook ups put 24vac power on terminals 1 and 2 all the time; this should cause the damper to close. When power is switched to Motor 4, damper should open. Test: Now, with all thermostats Off and the HVAC unit at rest, damper should be open. Many customers think the dampers should be closed until its zone calls for air, but this is not true. All modern zone control systems leave all the dampers open all the time, unless another zone calls for air; only then will dampers serving unused zones close.
(b) Round (RD) Dampers: Position the Replacement Motor and secure it with the small S/M Screw from the original motor through the Bracket and the Large Screws from the original motor through the Replacement Motor as shown on page 1 and re-attach the wires as per the Terminal Identification Label.
FOR TRUE SIZE (TS) ROUND DAMPERS:
1. Prior to replacing your damper motor, be sure to turn off all incoming electrical power.
2. Disconnect all wires from the current motor, noting the appropriate terminal numbers.
3. Loosen the Mounting Nut and Set Screw #2; remove and discard the existing damper motor assembly, retaining screws.
4. Prior to assembling the Replacement Motor, ensure the Motor Shaft is in the position shown below at left (closed/red position) and secure the coupling to the Motor Shaft as per that view. Once set, tighten the Set Screw #1.
✧NOTE: Prior to attaching the Mounting Plate, the Bracket may need to be removed to secure the Replacement Motor Assy properly. Secure the original Mounting Plate to the Replacement Motor as shown below at center using the two Large Screws from the original motor assembly.✧
5. Install the Replacement Motor Assy onto the Blade Shaft and Stud. Secure it with the Set Screw #2 and Mounting Nut. Reconnect the wires as before.
OLDER MODEL MOTORS AND DAMPERS:
• These motors will NOT look like older model DuroZone motors, and may require removal of some parts. These are RetroZone™ brand factory authorized DuroZone replacement motors.
• Many older dampers require the removal of the metal base plate and square to round adapter, which we have already done on the motor we shipped to you. If you do receive a motor with the metal base plate still present, remove the two straight slotted screws extending from the bottom of the motor. Then use an Allen head wrench to loosen the set screw in the square to round adapter, and remove it. See pictures, below.
Picture 1: The correct replacement motor, after base plate and square to round adapter are removed
Picture 2: Base plate that must be removed for use on older dampers
Picture 3: Square to round adapter shaft that must be removed for use on older dampers.
Picture 4: Older style DuroZone motor part #35138 and 35139
Picture 1
