AERCO Electronic Control Valve - Manual (Page 36)

VA-115 INSTRUCTIONS – ELECTRONIC CONTROL VALVE, CXT-E
8-12
ACTUATOR REPLACEMENT
There are no repairable parts contained in the Actuator. Therefore, if the Troubleshooting procedures in
this Instruction Manual isolate the cause of the fault to the Actuator, it must be replaced as described in
the following steps:
CM45. Disconnect and lock-out/tag-out AC power going to the Control Box. Use a voltmeter to ensure
that all voltages are zero before continuing.
CM46. Disconnect the cable connected to the Actuator.
CM47. Using an 8 mm wrench, loosen the hex nuts securing the Actuator to the Linkage Shaft.
CM48. Completely remove the defective Actuator from the shaft.
CM49. To install the replacement Actuator, depress and hold the Clutch button (Figure 8-5) and rotate
the pointer to approximately 80° on the dial. Release the Clutch.
CM50. Next, slide the Actuator onto the Linkage Shaft.
CM51. Ensure that the pin on the Linkage Assembly is inserted in the center slot on the bottom of the
Actuator (Figure 8-5).
CM52. Verify that the indicator plate on the Linkage Assembly is aligned with the 0 (zero) marking on the
Linkage scale. Also, ensure that the Actuator Dial is approximately at the 80° position.
CM53. Ensure that the Pin on the Linkage is inserted in the center slot on the Actuator.
CM54. Using an 8 mm wrench, tighten the hex nuts on the U-bolt to secure the Actuator to the shaft.
Torque nuts to 60 in-lbs.
CM55. Reconnect the Control Box cable to the Actuator.
CM56. Following Actuator replacement, perform the Control Valve Adjustment procedure in Section 3.