Foreword - Watts Aerco Benchmark BMK750 Operation And Service Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
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FOREWORD

The AERCO Benchmark (BMK) 750 through 6000 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.
IMPORTANT!
Unless otherwise specified:
•
All descriptions in this document apply to the Benchmark Series of boiler.
•
All measurements apply to both natural gas and propane models.
The Benchmark models operate within the input and output ranges listed below.
Benchmark Boiler Intake and Output Ranges
INPUT RANGE (BTU/HR.)
MODEL
MINIMUM
BMK750 50,000 (14.6 kW)
BMK1000 50,000 (14.6 kW)
BMK1500 75,000 (22 kW)
BMK2000 100,000 (29.3 kW)
BMK2500 167,000 (48.9 kW)
BMK3000 200,000 (58.6 kW)
BMK4000 267,000 (78.2 kW)
BMK5000N 250,000 (73.3 kW)
BMK5000 400,000 (117 kW)
BMK6000 400,000 (117 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, the BMK750 – 2000
and 5000 & 6000 comply with the NOx emission standards outlined in: South Coast Air
Quality Management District (SCAQMD), Rule 1146.2. In addition, the BMK2500 – 6000
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
OMM-0145_D • GF-218 •
11/2/2020
MAXIMUM
750,000 (220 kW) 47,750 (14 kW)
1,000,000 (293 kW) 48,300 (14.15 kW)
1,500,000 (440 kW) 64,500 (18.9 kW)
2,000,000 (586 kW) 86,000 (25.2 kW)
2,500,000 (732 kW) 144,000 (42.2 kW)
3,000,000 (879 kW) 174,000 (51.0 kW)
4,000,000 (1172 kW) 232,000 (68.0 kW)
4,990,000 (1462 kW) 218,000 (63.9 kW)
5,000,000 (1465 kW) 348,000 (102 kW)
6,000,000 (1758 kW) 348,000 (102 kW)
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
OUTPUT RANGE (BTU/HR.)
MINIMUM MAXIMUM
716,250 (210 kW)
968,000 (284 kW)
1,395,000 (409 kW)
1,860,000 (545 kW)
2,395,000 (702 kW)
2,874,000 (842 kW)
3,800,000 (1113 kW)
4,740,000 (1389 kW)
4,750,000 (1392 kW)
5,700,000 (1670 kW)
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