ECS & CXT-E Control Valve Retrofit for SW Double Wall Heaters
Technical Instruction Document
TID-0140_0A
12/30/2014
AERCO International, Inc.
•
100 Oritani Dr.
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Blauvelt, New York 10913
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Phone: 800-526-0288
Page 10 of 58
2.4
REMOVAL OF ITEMS CONNECTED TO HEATER SHELL
In order to install several new ECS components, the Drain Ball Valve must be disconnected and
the Cold Water Inlet Orifice Disc removed. Proceed as follows:
1. Disconnect any external piping connected to the Cold Water Inlet and Drain Ball Valve
Outlet on the Heater Shell.
2. Locate the Orifice Disc in the Cold Water Inlet.
3. Using a pair of pliers, disconnect the snap ring securing the Disc in the Inlet Nozzle.
4. Remove the clip and the Orifice Disc from the Inlet Nozzle. Discard
2.5
CONTROL VALVE ACTUATOR REMOVAL
The Water Heater may currently be equipped with a Pneumatic, Self-Contained or Electro-
Hydraulic Control Valve Actuator. Therefore, refer to the appropriate paragraph for the type of
Control Valve Actuator currently installed.
NOTE
Following removal of the existing Control Valve Actuator, AERCO
recommends that the Valve Seat and Packing be replaced using the
appropriate items included with the Retrofit Kit. If the Valve is relatively
new (less than 1 year) and is currently equipped with a Pneumatic or
Electro-Hydraulic Actuator, replacement of these items may be omitted at
the discretion of the user. However, if the Valve is currently equipped with
a Self-Contained Actuator, replacement of these items is mandatory,
since the Valve must be virtually disassembled to remove the installed
Actuator. A new Valve Top (plus other items) must also be added to Self-
Contained Valves before an ECS Actuator and Linkage Assembly can be
installed.
2.5.1 Pneumatic Control Valve Actuator Removal
Refer to Figure 2-3 and remove the Pneumatic Control Valve Actuator as follows:
1. Disconnect the compression fitting connecting the control air line from the Actuator Top.
2. Loosen the hex nut under the indicator disk.
3. Insert a 1/8 inch steel rod in the hole provided in the upper shaft. Hold the rod to keep the
upper shaft from turning when performing the next step.
4. Using a pair of pliers, grasp the lower shaft and rotate it counterclockwise to separate it from
the upper shaft. Use care to avoid scratching the lower shaft.
5. Remove the two 3/8-16 cap screws securing the Pneumatic Actuator to the Valve Body.
Remove the entire Actuator from the Valve.