Aerco EXT Series Application Manual

Modulating condensing hot water boilers

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Application Guide

Modulex EXT Series

Modulating Condensing Hot Water Boilers

LIGHT COMMERCIAL MODELS:

• MLX EXT 450 2S

• MLX EXT 600 2S

• MLX EXT 800 2S

• MLX EXT 1100 2S

COMMERCIAL MODELS:

• MLX EXT 1500 2S

• MLX EXT 2300 2S

• MLX EXT 2600 2S

• MLX EXT 3000 2S

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 or for incidental or consequential

damages occurring in connection with the furnishing, performance, or use of

these materials.

TAG-0096

• 10/06/2021

Heating and Hot Water Solutions

AERCO International, Inc. • 100 Oritani Drive • Blauvelt, NY 10913

USA: T: (845) 580-8000 • Toll Free: (800) 526-0288 • AERCO.com

Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST

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Page 1 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...
Page 2 3. GAS PRESSURE REQUIREMENTS AERCO Modulex EXT boilers require a stable gas input pressure. The inlet supply to the unit must be at least 3.5 “ W.C. when firing at maximum input. A minimum supply gas pressure switch prevents the boiler from operating without sufficient pressure.
Page 3 Modulex EXT Series Piping Application Guide CAUTION! The AERCO Modulex EXT boilers must be isolated from the system when leak testing. Drip legs are typically required at the gas supply of each unit to prevent any dirt, weld slag, or debris from entering the boiler gas train inlet pipe.
Page 4 5” 41,800 28,700 23,000 19,700 15,800 13,600 12,000 NOTE: For further information refer to National Fuel Gas Code Handbook, ANSI Z223.1. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 4 of 7 TAG-0096 10/06/2021 Phone: 800-526-0288...
Page 5 A typical gas piping header diagram for two AERCO Modulex boilers is illustrated in Figure 2. Header should be located above or behind boiler. Gas piping should not be installed directly over top or front of any part of boiler.
Page 6 For EXT 1500 2S-3000 2S (Figure 4), use 32” (81.28mm) for vent flue at any side as needed, and 24” (60.96mm) all others. AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 6 of 7 TAG-0096...
Page 7 Modulex EXT Series Piping Application Guide MLX 1500 2S-3000 2S MLX 450 2S-1100 2S Figure 5: MODULEX EXT Boiler Top Clearances AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 TAG-0096 Page 7 of 7 Phone: 800-526-0288 10/06/2021...

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Aerco EXT Series Application Manual

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