Now, even the smallest hydronic projects will be able to cost effectively leverage the fuel savings and operating reliability of a condensing, fully modulating boiler backed by a market-proven design.

• Unmatched 20:1 Turndown & Low NOx
• Compact, Easy-to-Apply Design
• Performance-Proven Design
• Standard Controls Package

Unmatched 20:1 Turndown with Low NOx Emissions

As a condensing boiler, the thermal efficiency of the BMK1.5LN increases when applied in a system that leverages cold return water temperatures. But it's the unit's unmatched 20:1 turndown that really maximizes operating efficiency and seasonal fuel savings.

From 75,000 BTU/hr. to its full fire input capacity of 1.5 million BTU/hr., the BMK1.5LN precisely matches fluctuating loads. This incredible range of operation minimizes boiler cycling and eliminates wasteful temperature overshoot. And the operating efficiency of the BMK1.5LN boiler actually increases as the load decreases. In simple terms, at its lowest firing rates (or BTU/hr. inputs), the unit's heat exchanger becomes greatly oversized in proportion to the load - allowing much greater thermal transfer to take place. The means that the BMK1.5LN saves the most energy during part load operations that characterize the majority of the heating season.

And the BMK1.5LN consistently delivers <30ppm NOx at all firing levels making it ideal for environmentally-friendly projects. The unit employs the same Low NOx burner design and proprietary fuel delivery system as the BMK2.0LN.

Compact, Easy-to-Apply Design

Measuring only 79" high x 28" wide x 36" deep, the BMK1.5 LN fits easily through a standard size doorway and occupies a very small footprint. And it fits the most challenging projects as easily as it fits the smallest mechanical rooms.

The BMK1.5 boiler supports sealed combustion, ceiling/sidewall venting and low gas pressure applications. Ideal in low flow applications, the unit operates with a small water side pressure drop and can withstand no flow conditions without damaging the heat exchanger.

From a controls standpoint, the unit's C-More control system can be integrated directly into a facility-wide Building Automation System via Modbus and is fully compatible with AERCO's Boiler Management System II (BMS II) for multiple unit installations.

Performance-Proven Design

Best of all, the BMK1.5LN employs the same parts and technologies that have been performance proven over the past ten years as part of the Benchmark 2.0 boiler line.

Standard Controls Package

The AERCO C-More™ Control Package supports constant set point, remote set point and/or outdoor reset schedule for individual boiler operation. Offers step-by-step diagnostic menus and status displays to help users set controls and check faults. More than 40 distinct messages, written in easy-to-understand language, convey subsystem status throughout the start-up sequence and during operation. The flash-upgradeable platform can be remotely monitored, controlled and upgraded via Modbus protocol using the RS-232 or RS-485 connection. The system provides failsafe and independent operation in the event of external building control system failures.

PRODUCT OPTIONS

Dual Fuel Gas Train – Allows real-time cutover from natural gas to propane by rotating the fuel selector switch and changing of logic sticks.

IRI Gas Train - Incorporates two safety shut-off valves in a single valve body with normally open vent valve.

Reduced NOx Levels - AERCO recommended calibration points can be re-set to support applications that require reduced NOx emissions levels of <12ppm. However, the unit's input rate, performance efficiency and venting requirements will change. Please consult the factory for assistance balancing your efficiency and environmental requirements.

Low Gas Pressure - For applications where the maximum available gas pressure is only 4" W.C., a de-rated configuration of the product is available at 1,750,000 BTU/hr. 

ACCESSORIES

AERCO BMS II - optional multiple unit controller recommended for installations of two or more boilers to maximize operating efficiency.

Communications Gateway - optional accessory supports boiler or BMS integration with BACnet, LonWorks and N2 systems.

AERClean Air FIlter - This system is for use on boilers drawing air directly from the boiler room; it prevents internal component damage by filtering particulates and airborne dust and debris from the combustion air intake.

Secondary Low Water Cut-Off (LWCO) - where required by building code. Secondary LWCO must be installed external to boiler.

Sentinal Products - Compatible with all materials found in a hydronic loop, these chemicals offer overall protection of a heating system from sludge, scale, corrosion, and freeze conditions.
 
Belimo F6... HDU Series 2-way butterfly valves - are designed to meet the needs of HVAC and commercial application requiring bubble tight shut-off for liquids.  Typical applications include boiler isolation, chiller isolation, cooling tower isolation, change-over systems, air handler coil control, bypass and process control applications.