Environmental Technologies Air Terminal Unit SDL-SA-10

Ensure all electrical work is finished and properly terminated.

Verify all electrical connections are tight and the proper voltage is connected.

Measure AC power imbalance (should not exceed 2%).

Confirm AC power conditions are met

Is the downstream static pressure at least 0.1" w.g. for equipment with electric heat?

Obtain and understand the project control sequence/wiring diagram.

Refer to the applicable Operation Manual for start-up and balancing information if factory supplied analog or DDC controls are utilized.

Disconnect all electrical power to the equipment, tag and lock out power source.

Gain access to coil either through ductwork or optional coil access panel.

Use soft brush and vacuum to remove loose debris from sides of coil.

Ensure no fluids or solvents are used during cleaning.

Straighten any coil fins that may have been damaged during cleaning process with fin comb.

Replace ductwork or access panel and restore electrical power to equipment.

Mechanical Angle of Rotation Stops

Loosen the two end stop screws using a No. 2 Phillips head screwdriver

Ensure not to unscrew the captive nut under the slot

Move the stops to the desired position (in 2.5° steps)

Electric Heater Rack Replacement

Turn off power supply before servicing

Locate T-Plate inside on heater control enclosure

Mark where the wires are connected on the T-Plate before removing them

Remove the wires and screws holding the heater T-plate in the control enclosure

Insert new element rack into control enclosure

Replace screws to secure the element rack to control enclosure

Disconnect actuator from the controller.

Apply 24 VAC to the COM and CW terminals on the actuator.

Did the actuator rotate in a clockwise direction?

Apply 24 VAC to the COM and CCW terminals on the actuator.

Did the actuator rotate in a counter clockwise direction?

Does the actuator move in both directions?

If the actuator does not rotate, is it at an end stop or is there a problem with the damper?