AERCO ECS Retrofit - Manual (Page 3)

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1.3 Retrofit Kit Contents
The contents of the Retrofit Kits, Part No. 27004-[ ] are included in Appendices A through D of this
Bulletin. The contents included in these Appendices are as follows:
• Appendix A: Lists the Basic ECS Retrofit Kit contents for each Water Heater Model
• Appendix B: Lists Optional Items based on: valve size, flow rate, type of actuator
currently installed
• Appendix C: Lists Valve Kits required for previously installed Pneumatic and Electro -
Hydraulic Actuators
• Appendix D: Lists Valve Kits required for previously installed Self-Contained
Actuators
WARNING
HIGH VOLTAGE OF 120 VAC IS USED IN AERCO INDIRECT FIRED
WATER HEATERS. USE EXTREME CARE WHEN ACCESSING CIRCUITS
AND ELECTRICAL CONNECTIONS WITHIN THE EQUIPMENT. SERIOUS
PERSONAL INJURY OR DEATH MAY OCCUR IF THIS WARNING IS NOT
OBSERVED. FOLLOW OSHA APPROVED LOCKOUT/TAGOUT
PROCDURES.
2. EQUIPMENT ISOLATION AND REMOVAL PROCEDURES
The locations of the major items to be removed from an AERCO Indirect Fired Water Heater are
shown in Figures 2-1 (Helitherm Models) and 2-2 (Double-Wall Models). These items include:
• Currently Installed Control Valve Actuator (Pneumatic, Self-Contained or Electro-Hydraulic)
• Control Box
• Top Head Solenoid Valve
• Thermal Element
• Shunt Tube
• Temperature Gauges & Capillaries
• Existing Feedback Sensor
• Load Alert Components (Except for Units With Electro-Hydraulic Valves)
In addition to the items listed above, the Drain Ball Valve (if installed) and Cold Water Inlet piping will
be temporarily disconnected to permit installation of a Flow Meter and Orifice Disk.