130 4280 010 E
Actuator Replacement
CAUTION: Equipment damage hazard. Label all wires prior to disconnection when servicing valves.
Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
Follow the procedure below to replace the actuator.
• Close the upstream shutoff cock and disconnect power to the actuator.
• Remove the terminal box cover by loosening four cover screws.
• Disconnect field wiring. As you disconnect each wire, label it with the correct terminal designation.
• Remove the four fixing screws from the flanged ring and lift off the actuator and flanged ring.
• If the actuator is equipped with an extension piece: loosen the grub screw from the extension piece and
remove the extension piece from the actuator stem. See Figure 4.
CAUTION: Equipment damage hazard. The extension piece must be retained when replacing the
actuator. The stem length is critical to proper closing of the valve. There must be a minimum clearance
of 1 mm between the valve stem and valve seat plug.
• Push the extension piece onto the stem of the replacement actuator and tighten the grub screw.
• Place the actuator, without seal, onto the valve body. It must rest firmly on the valve body. If the actuator
does not rest firmly, clean the bore of the valve body.
• Clean the seal and place it on the valve body.
• Place the flanged ring and actuator on the valve body and loosely tighten the fixing screws (torque see
Table 3).
• Turn the actuator to the preferred position and evenly tighten the fixing screws in a diagonally opposed
pattern.
• Open the upstream shutoff cock and check for leakage along the flanged ring. (Refer to the Checkout
Procedure section).
• Remove the cover of the terminal box by loosening the four cover screws.
• Connect field wiring to the terminal box.
• If necessary, make switch adjustments. Refer to the Adjustments section for details.
• Reattach the terminal box cover by tightening the four cover screw.
• Apply power to the actuator.
• Observe at least three complete operating cycles to ensure that all components are functioning correctly.
Johnson Controls SA/NV - Leuvensesteenweg 248D - B-1800 Vilvoorde - +32(2) 709 40 00 - www.johnsoncontrols.be
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