The AERCO Benchmark 6000 Water Boiler is designed for condensing application in any closed loop hydronic system. It delivers 15:1 burner turndown to match energy input directly to fluctuatingsystem loads to yield the highest possible seasonal efficiencies.And no other product packs as much capacity into such a small footprint. The AERCO Benchmark 3000 Water Boiler is designed for condensing application in any closed loop hydronic system. It delivers 15:1 burner turndown to match energy input directly to fluctuating system loads to yield the highest possible seasonal efficiencies. And no other product packs as much capacity into such a small footprint. The AERCO Benchmark (BMK) 750, 1000, 1500, 2000, 2500, and 3000 natural gas fueled boilers are modulating and condensing units. They represent a true industry advance that meets.
Benchmark 1500 - 2000 Boilers
CHAPTER 2 – INSTALLATION
OMM-0097_0D
Aerco Benchmark 3000 Manual 1
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 31 of 188
GF-142
Ph.: 800-526-0288
2.12 COMBUSTION AIR
The AERCO Benchmark Boiler Venting and Combustion Air Guide, GF-2050 MUST be consulted before any flue or inlet air venting is designed or installed. Air supply is a direct requirement of ANSI 223.1, NFPA-54, CSA B149.1 and local codes. These codes should be consulted before a permanent design is determined.
The combustion air must be free of chlorine, halogenated hydrocarbons or other chemicals that can become hazardous when used in gas-fired equipment. Common sources of these compounds are swimming pools, degreasing compounds, plastic processing, and refrigerants. Whenever the environment contains these types of chemicals, combustion air MUST be supplied from a clean area outdoors for the protection and longevity of the equipment and warranty validation.
The more common methods of combustion air supply are outlined in the following sections. For combustion air supply from ducting, consult the AERCO GF-2050, Gas Fired Venting and Combustion Air Guide.
2.12.1 Combustion From Outside the Building
Air supplied from outside the building must be provided through two permanent openings. For each unit these two openings must have a free area of not less than one square inch for each 4000 BTUs input of the equipment or 375 square inches of free area for the BMK 1500 or 500 square inches of free area for the BMK 2000. The free area must take into account restrictions such as louvers and bird screens. For Canada installations, refer to the requirements specified in CSA B149.1-10, sections 8.4.1 and 8.4.3.
2.12.2 Combustion Air from Inside the Building
When combustion air is provided from within the building, it must be supplied through two permanent openings in an interior wall. Each opening must have a free area of not less than one square inch per 1000 BTUH of total input or 3000 square inches of free area. The free area must take into account any restrictions, such as louvers.
2.13 DUCTED COMBUSTION AIR
For ducted combustion air installations, the air ductwork must then be attached directly to the air inlet connection on the sheet metal enclosure.
In a ducted combustion air application, the combustion air ducting pressure losses must be taken into account when calculating the total maximum allowable venting run. See the AERCO Benchmark Venting and Combustion Air Guide, GF-2050. When using the unit in a ducted combustion air configuration, each unit must have a minimum 8 inch diameter connection at the unit.
2.14 SEQUENCING VALVE INSTALLATION
All Benchmark units are shipped with a connection for an optional motorized
external
sequencing valve (p/n 92084-TAB) included in the shipping container. This valve is an integral component of the AERCO’s on-board Boiler Sequencing Technology (BST) solution. BST allows sites with multiple boilers to have one boiler, acting as a “master” to manage the other boilers at the site in such a way that the efficiency of the entire boiler array is maximized.
The implementation of BST, and the installation and use of this valve is optional.
The boiler IS pre-wired to accept the sequencing valve. Installation consists of installing the sequencing valve in the hot water outlet pipe, and then connecting it into the shell harness, as described below.