AERCO Buffer Tanks - Manual (Page 4)

VD2: 08/27/12 Page 4 of 14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
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.