Benchmark 750-3000 Boiler Installation & Startup Manual
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OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 5 of 122
FOREWORD
The AERCO Benchmark (BMK) 750, 1000, 1500, 2000, 2500, and 3000 natural gas and
propane fueled boilers are modulating and condensing units. They represent a true industry
advance that meets the needs of today's energy and environmental concerns. Designed for
application in any closed loop hydronic system, the Benchmark's modulating capability relates
energy input directly to fluctuating system loads. These BMK models provide extremely high
efficiency operation and are ideally suited for modern low temperature, as well as, conventional
heating systems.
The Benchmark models operate within the input and output ranges listed below. All
measurements apply to both natural gas and propane models, unless otherwise specified.
Benchmark Boiler Intake and Output Ranges
MODEL
INPUT RANGE (BTU/HR.) OUTPUT RANGE (BTU/HR.)
MINIMUM MAXIMUM MINIMUM MAXIMUM
BMK 750 50,000 (14.6 kW) 750,000 (220 kW) 47,750 (14.0 kW) 716,250 (210 kW)
BMK 1000 50,000 (14.6 kW) 1,000,000 (293 kW) 48,300 (14.2 kW) 968,000 (284 kW)
BMK 1500 75,000 (22 kW) 1,500,000 (440 kW) 64,500 (18.9 kW) 1,395,000 (409 kW)
BMK 2000 100,000 (29.3 kW) 2,000,000 (586 kW) 86,000 (25.2 kW) 1,860,000 (545 kW)
BMK 2500 167,000 (48.9 kW) 2,500,000 (732 kW) 144,000 (42.2 kW) 2,395,000 (702 kW)
BMK 3000 200,000 (58.6 kW) 3,000,000 (879 kW) 174,000 (51.0 kW) 2,874,000 (842 kW)
The output of the boiler is a function of the unit’s firing rate (valve position) and return water
temperature.
When installed and operated in accordance with this Instruction Manual, these boilers comply
with the NO
x
emission standards outlined in: South Coast Air Quality Management District
(SCAQMD), Rule 1146.2. In addition, the BMK 750 & 1000 comply with the Bay Area Air
Quality Management District regulation 9, Rule 7.
Whether used in singular or modular arrangements, the BMK boilers offer the maximum venting
flexibility with minimum installation space requirements. These boilers are Category II and IV,
positive pressure appliances. Single and/or multiple breeched units are capable of operation in
the following vent configurations:
• Room Combustion Air:
o Vertical Discharge
o Horizontal Discharge
• Ducted Combustion Air:
o Vertical Discharge
o Horizontal Discharge
These boilers are capable of being vented utilizing Polypropylene and AL29-4C vent systems. In
addition, the BMK 750 & 1000 models are also approved for PVC and CPVC, vent systems.
The Benchmark's advanced electronics are available in several selectable modes of operation
offering the most efficient operating methods and energy management system integration.
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