AERCO Coil & Riser Replacement - Manual (Page 3)

PR2: 04/01/11 Page 3 of 16 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Coil/Riser Replace Instructions for Helitherm Water Heaters
Technical instructions TID-0038_0A
HE-109
1. Introduction
This document provides the instructions necessary for removal and replacement of Coil Assemblies and
Risers contained in AERCO Indirect-Fired Heat Exchangers. 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. It is imperative that the following Safety Warnings
and Precautions be observed at all times:
2. Overview of Procedure
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.
3. Reference Documents
Refer to the following AERCO documents when removing, replacing or adjusting the indicated
components and assemblies:
HE-104 SW1B-Plus Heat Exchanger Installation, Operation & Maintenance Instructions.
HE-107 SW1A-Plus Heat Exchanger Installation, Operation & Maintenance Instructions.
HE-110 B-Plus II Water Wizard Heat Exchanger Installation, Operation & Maintenance
Instructions.
VA-109 For removal of CXT-S 1” thru 2” Control Valve prior to hydrostatically testing and
for re-commisioning unit.
VA-110 For removal of CXT-S 2.5” thru 4” Control Valve prior to hydrostatically testing
and for re-commisioning unit.
VA-106 For removal of CXT-P Control Valve prior to hydrostatically testing and for
re-commissioning unit.
AC-103 For adjusting Barber-Coleman Temperature Controller for re-commissioning unit.
WARNING!
FLUIDS UNDER PRESSURE MAY CAUSE INJURY TO PERSONNEL OR DAMAGE
TO EQUIPMENT WHEN RELEASED
Shut off all incoming and outgoing steam and water stop valves and carefully decrease
all trapped pressures to zero before performing any maintenance.
WARNING!
LIVE STEAM CAN CAUSE SEVERE BURNS
Never search for leakage in a live steam line by sight alone or by “feel”. Use a
mirror or other suitable polished object.
Always provide yourself with personal protective equipment, (PPE) such as
gloves, eye protection, dust mask, hard hat, etc.