AERCO Electronic Controls System (ECS) - Manual (Page 58)

Electronic Control System (ECS) and Type CXT-E Valve
9. RECOMMENDED SPARE PARTS
Page 58 of 82
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 VD2: 02/28/14
OMM-0003_0D AC-105
8.2.4 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:
1) 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.
2) Disconnect the Control Box cable connected to the Actuator.
3) Using an 8 mm wrench, loosen the hex nuts securing the Actuator to the Linkage Shaft.
4) Completely remove the defective Actuator from the shaft.
5) 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.
CAUTION
The clutch must NEVER be engaged with power applied or
damage will result.
6) Next, slide the Actuator onto the Linkage Shaft.
7) Ensure that the pin on the Linkage Assembly is inserted in the center slot on the bottom of
the Actuator (Figure 8-5).
8) 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.
9) Ensure that the Pin on the Linkage is inserted in the center slot on the Actuator.
10) 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.
11) Reconnect the Control Box cable to the Actuator.
12) Following Actuator replacement, perform the Control Valve Adjustment procedure in
Section 3.
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