AERCO ECS Retrofit - Manual

1
INTERNATIONAL, INC.
159 PARIS AVENUE • NORTHVALE, NJ 07647 • PHONE 201-768-2400
TECHNICAL SERVICE BULLETIN
Date: 04/11/07 REV. Number: 2006-02
Subject: ELECTRONIC CONTROL SYSTEM (ECS) & CONTROL
VALVE, CXT-E RETROFIT INSTRUCTIONS
Page 1 of 81
1. INTRODUCTION
This Service Bulletin provides the procedures necessary to remove an existing Control Valve Actuator
and Control Box and replace it with a new CXT-E Electronic Control Valve Actuator and Electronic
Control System (ECS). These procedures are applicable to all AERCO Indirect-Fired Water Heaters with
Control Valves ranging in size from 1 inch to 4 inches and currently equipped with pneumatic, electro-
hydraulic or self-contained valve actuators. In addition, this Service Bulletin applies to both steam-to-
water and water-to-water heaters. The types and models covered include:
• HELITHERM HEATER MODELS:
• A-Plus
• B-Plus
• B-Plus II (Water Wizard)
• E-Plus
• DOUBLE-WALL HEATER MODELS:
• DW-24
• DW-45
• DW-68
These instructions must be performed by a skilled service technician capable of exercising the necessary
safety precautions when working with high temperature, pressurized steam and water systems.
The following paragraphs in this Section describe the safety precautions to be followed, the tools and test
equipment required to perform all procedures in this Service Bulletin and the contents of the Retrofit Kits
for all Heater Models.
1.1 SAFETY PRECAUTIONS
Installation, maintenance and operating personnel must, at all times, observe all safety regulations. The
following warnings are general and must be given the same attention as specific precautions included in
these instructions.