AERCO Buffer Tanks User Manual

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone]

TID-0006_0B

TECHNICAL INSTRUCTIONS

Created: 08/27/2012

Hardware Procedure:

Applies to:

the installation and maintenance of the

AERCO 4-Port Buffer Tank

AERCO Buffer Tank

Installation and

Maintenance

Any applicable water heater/boiler piping
system arrangement.

Description of Document:
This Technical Instruction Document

provides the instructions necessary for

AERCO buffer tanks in AERCO and non­AERCO systems.

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone]

AERCO Buffer Tank Installation and Maintenance

Technical Instruction Document

TID-0006_0B

Technical Support:

1-800-526-0288

www.aerco.com

(Mon–Fri, 8am-5pm EST)

Disclaimer

The information contained in this manual is subject to change without notice from
AERCO International, Inc. AERCO makes no warranty of any kind with respect to this
material, including, but not limited to, implied warranties of merchantability and fitness for
a particular application. AERCO International is not liable for errors appearing in this
manual. Nor for incidental or consequential damages occurring in connection with the
furnishing, performance, or use of this material.

VD2: 08/27/12 Page 2 of 14

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone]

AERCO Buffer Tank Installation and Maintenance

Technical Instruction Document

TID-0006_0B

TABLE OF CONTENTS

1. INTRODUCTION ................................................................................ 4

2. BUFFER TANK TYPES ...................................................................... 4

3. BUFFER TANK INSTALLATION ........................................................ 6

4. BUFFER TANK FIELD PIPING ........................................................... 7

AERCO’S LIMITED BUFFER TANK WARRANTY ...................................... 13

VD2: 08/27/12 Page 3 of 14

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone]

AERCO Buffer Tank Installation and Maintenance

Technical Instruction Document

TID-0006_0B

1. INTRODUCTION

AERCO buffer tanks are ASME certified pressure vessels designed for use with high efficiency,
low volume systems that incorporate low-mass condensing boilers. Hydronic heating systems
featuring several low BTU heating loads (calling at different times) very often operate below the
design load conditions, which causes short-cycling and so may reduce system efficiency and
equipment life. A buffer tank may be added to such a system to add thermal mass, dampen fast
transitions and minimize boiler cycling that occurs during zero or low domestic load conditions,
thus reducing short cycling.

IMORTANT NOTICE!

Incorrect installation can cause rapid failure of water tanks due to
electrolysis. It is vital that this risk is reduced by the use of
dielectric connections, and isolation of the tank supports.
Installers must be aware of correct procedures. For assistance
please call: 1-800-526-0288.

2. BUFFER TANK TYPES

The AERCO buffer tanks come as either a 2-port or a 4-port primary-secondary tank and in the
following three sizes:

• 104 gallons

• 210 gallons

• 289 gallons

See Figure 1 for port designations and dimensions.

VD2: 08/27/12 Page 4 of 14

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: [phone]

AERCO Buffer Tank Installation and Maintenance

Technical Instruction Document

TID-0006_0B

Figure 1: AERCO Buffer Tanks – Port Designations

VD2: 08/27/12 Page 5 of 14