IOM - Enviro-Tec

Current Controller (Figure 2a) Old Controller (Figure 2b)(Refer to page 4) (No longer available)1.3 ACTUATOR (FIGURE 3)a. A.C. Motor – Hansen “Synchronization” model is actually two motors “pancaked” together, each with 24VAC, 5 W winding. The output at pinion gear is 1 RPM. White wires are used for common, blue wireconnects to CW motor, yellow to CCW motor. A 13 ohm resistor was provided on the controller toprevent damage by high voltage (used throughout 1990). Replacement rotary model is ETACTRTADS or,if position switch is required, ETACTRTADSA.b. D.C. Motor – Reversible D.C. motor. Output at pinion gear is approximately 2 RPM, depending on load.Connections are made using 3/16" quick connect receptacles (see 1.2.d above for drive circuitrydescription).c. Rack & Pinion Drive Train – Rack and pinion type with lubricated steel gear insert in rack for strength.Pin at end of rack attaches to damper shaft with bolt. Rack contains internal stops. Full travel time isapproximately 70 seconds for 45° damper travel (used through August 1992). This drive train with D.C.motor is no longer available. Replacement rotary model is ETACTRT or, if damper position switch isrequired, ETACTRTA.d. Rotary – 90° rotation. Slides over damper shaft and uses two set screws. Full travel time is 2 to 3minutes for 90° rotation. (Attach to damper shaft with approximately 1/8” gap between bottom ofactuator and bottom of control enclosure.)(c) Rack & Pinion TypeActuator (Figure 3)(d) Rotary Type