OVERVIEW
Aerco BMK-5000 LGP High-Efficiency Condensing Gas Boiler - Model BMK-5000 LGP. Professional-grade natural gas-fired condensing boiler featuring 5,000,000 BTU/HR (5000 MBH) maximum input capacity with 4,700,000 BTU/HR output at 94% AHRI thermal efficiency, equivalent to approximately 140 boiler horsepower. Advanced modulating condensing boiler with 12:1 turndown ratio (400,000 to 5,000,000 BTU/HR range). Complete with 439 stainless steel heat exchanger, integrated modulating air/fuel valve system, fault mode diagnostic panel with digital readout, and comprehensive safety controls. Factory-assembled unit with insulated heat exchanger, electric probe low water cutoff, automatic and manual reset high limits, and CSD-1 compliant gas train. Modern black and gray cabinet design with professional finish. Wall-mounted or floor-standing configuration. 480V 3-phase 60Hz electrical service. Used condition with protective wrapping. Ideal for commercial buildings, institutional facilities, industrial applications, multi-family housing, schools, hospitals, or any facility requiring high-efficiency, low-emissions natural gas heating with proven Aerco reliability and advanced condensing technology.
EQUIPMENT SPECIFICATIONS
Boiler Model Information:
Manufacturer: Aerco (A Watts Brand)
Product Line: BMK Series Condensing Boiler
Model Number: BMK-5000 LGP
Unit Designation: B-2
Configuration: High-efficiency condensing boiler
Fuel Type: Natural Gas (LGP - Low Gas Pressure)
Technology: Condensing design with stainless steel heat exchanger
Performance Ratings:
Maximum Input: 5,000,000 BTU/HR (5000 MBH / 5 Million BTU)
Minimum Input: 400,000 BTU/HR (400 MBH)
Output: 4,700,000 BTU/HR (4700 MBH / 4.7 Million BTU)
Boiler Horsepower: Approximately 140 HP equivalent
Thermal Efficiency: 94% AHRI certified
Turndown Ratio: 12:1 (modulating)
Fuel Type: Natural Gas
Configuration: Condensing hot water boiler
Electrical Specifications:
Voltage: 480 Volts
Phase: 3-Phase
Frequency: 60 Hertz
Power Supply: 480V/3Ph/60Hz
Heat Exchanger Specifications:
Material: 439 Stainless Steel
Design: Single inlet configuration
Construction: Condensing design
Insulation: Factory insulated
Corrosion Resistance: Stainless steel construction
Condensate Production: Includes condensate trap
Control Systems:
Fault Mode Diagnostic Panel with Digital Readout
12:1 Modulating Air/Fuel Valve
Adjustable Automatic Reset High Limit
Manual Reset High Limit (max 210°F setpoint)
Normally Open Fault Relay
Digital display and diagnostics
Advanced microprocessor control
Safety & Instrumentation:
Electric Probe Low Water Cut-Off
Adjustable Automatic Reset High Limit
Manual Reset High Limit (210°F max)
Combination Temperature and Pressure Gauge
Pressure Relief Valve (shipped loose)
CSD-1 compliant gas train
Multiple safety interlocks
Physical Configuration:
Type: Wall-mounted or floor-standing
Cabinet: Black and gray professional finish
Mounting: Versatile installation options
Color: Black with gray accents
Origin: USA (Aerco, Blauvelt, NY)
Manufacturer Location: 100 Oritani Drive, Blauvelt, NY 10913
KEY FEATURES & BENEFITS
Aerco Quality Manufacturing:
Premium USA boiler manufacturer
Watts brand family
BMK Series design
High-efficiency condensing technology
Professional engineering and design
Blauvelt, New York manufacturing
Proven reliability in demanding applications
Industry-leading design
High-Efficiency Condensing Design:
94% AHRI thermal efficiency rating
Condensing technology for maximum efficiency
Significantly reduced fuel costs
Lower emissions profile
Environmentally friendly operation
Energy Star equivalent performance
Reduced carbon footprint
Maximum heat recovery
Advanced Modulating Control:
12:1 turndown ratio capability
400,000 to 5,000,000 BTU/HR range (400 to 5000 MBH)
Precise output matching to load
Modulating air/fuel valve system
Reduced cycling and wear
Enhanced comfort control
Improved efficiency at partial loads
Responsive to demand changes
Stainless Steel Heat Exchanger:
439 stainless steel construction
Corrosion-resistant design
Condensing-rated materials
Single inlet configuration
Extended service life
Resistant to flue gas condensation
Professional engineering
Factory insulated for efficiency
Comprehensive Control Package:
Fault Mode Diagnostic Panel
Digital readout display
Real-time system monitoring
Diagnostic capabilities
Fault code identification
Easy troubleshooting
Professional control interface
User-friendly operation
Safety & Compliance:
CSD-1 compliant gas train
Electric probe low water cutoff
Dual high limit controls (auto and manual reset)
Manual reset high limit (210°F max setpoint)
Normally open fault relay
Pressure relief valve included
Multiple safety interlocks
Code-compliant construction
Professional safety engineering
Complete Factory Package:
439 stainless steel heat exchanger
Integrated modulating burner system
Fault diagnostic panel with digital display
Complete gas train (CSD-1 compliant)
Electric low water cutoff
Temperature and pressure gauge
Insulated heat exchanger
All controls factory-installed
Pressure relief valve (shipped loose)
Condensate trap (shipped loose)
2" external manual gas cock (shipped loose)
Professional Installation Ready:
Complete factory-assembled unit
Wall-mount or floor-standing capability
All controls pre-wired and tested
Simplified field connections
Reduced installation time
Professional documentation available
Clearance specifications provided
Venting requirements detailed
SYSTEM COMPONENTS
Main Boiler Assembly:
Aerco Model BMK-5000 LGP
5,000,000 BTU/HR (5000 MBH) maximum input
4,700,000 BTU/HR (4700 MBH) output
140 HP equivalent
94% thermal efficiency
Condensing design
439 stainless steel heat exchanger
Single inlet configuration
Factory insulated
Professional cabinet
Burner & Combustion System:
Modulating gas burner assembly
12:1 modulating air/fuel valve
Forced draft combustion
Pre-mix burner technology
Flame safeguard system
Gas pressure monitoring
Professional burner management
CSD-1 compliant gas train
Control Systems:
Fault Mode Diagnostic Panel
Digital readout display
Microprocessor-based control
Modulating control algorithms
Temperature controls
Pressure monitoring
Safety interlocks
Normally open fault relay
Professional control package
Safety & Instrumentation:
Electric probe low water cutoff
Adjustable automatic reset high limit
Manual reset high limit (210°F max)
Combination temperature/pressure gauge
Pressure relief valve (shipped loose)
Fault diagnostics
Safety interlocks
Emergency shutdown capability
Gas Train Components:
CSD-1 compliant assembly
12:1 modulating air/fuel valve
Manual gas cock (2", shipped loose)
Gas pressure regulation
Safety shut-off valves
Gas pressure switches
Inlet connection
Professional gas train
Condensate Management:
Condensate trap (shipped loose)
Condensate drain connection
pH neutralization provisions
Proper drainage design
Condensing boiler requirements
Heat Exchanger System:
439 stainless steel construction
Single inlet design
Condensing configuration
Factory insulation
Corrosion-resistant materials
Professional engineering
Extended service life
Cabinet & Mounting:
Professional black and gray finish
Insulated cabinet construction
Wall-mount or floor-standing capability
Access panels for service
Professional appearance
Durable finish
SPECIFICATIONS SUMMARY
Boiler:
Manufacturer: Aerco (A Watts Brand)
Model: BMK-5000 LGP
Unit: B-2
Type: Condensing gas boiler
Fuel: Natural Gas (LGP)
Max Input: 5,000,000 BTU/HR (5000 MBH / 5 Million BTU)
Min Input: 400,000 BTU/HR (400 MBH)
Output: 4,700,000 BTU/HR (4700 MBH / 4.7 Million BTU)
Horsepower: ~140 HP equivalent
Efficiency: 94% AHRI
Turndown: 12:1
Origin: USA
Electrical:
Voltage: 480 Volts
Phase: 3-Phase
Frequency: 60 Hertz
Service: 480V/3Ph/60Hz
Heat Exchanger:
Material: 439 Stainless Steel
Design: Single inlet
Type: Condensing
Insulation: Factory insulated
Configuration:
Type: Wall-mount or floor-standing
Cabinet: Black and gray finish
Condition: Used
Status: Available
ADDITIONAL INFORMATION
Condition: Used
Manufacturer: Aerco (A Watts Brand)
Product Line: BMK Series Condensing Boiler
Model: BMK-5000 LGP
Unit Designation: B-2
Fuel Type: Natural Gas (LGP - Low Gas Pressure)
Performance Specifications:
Maximum Input: 5,000,000 BTU/HR (5000 MBH / 5 Million BTU)
Minimum Input: 400,000 BTU/HR (400 MBH)
Output: 4,700,000 BTU/HR (4700 MBH / 4.7 Million BTU)
Boiler Horsepower: Approximately 140 HP equivalent
Thermal Efficiency: 94% AHRI certified
Turndown Ratio: 12:1 modulating capability
Modulation Range: 400,000 to 5,000,000 BTU/HR (400 to 5000 MBH)
Electrical Requirements:
Power Supply: 480 Volts, 3-Phase, 60 Hertz
Professional electrical installation required
Disconnect provisions per code
Circuit protection per specifications
Heat Exchanger Details:
Material: 439 Stainless Steel
Design: Condensing configuration
Inlet: Single inlet design
Insulation: Factory-installed insulation
Corrosion Resistance: Stainless steel for condensing applications
Service Life: Extended durability
Control System Features:
Fault Mode Diagnostic Panel with Digital Readout
Real-time system monitoring and diagnostics
Fault code display for easy troubleshooting
12:1 Modulating Air/Fuel Valve for precise control
Adjustable Automatic Reset High Limit
Manual Reset High Limit with maximum 210°F setpoint
Normally Open Fault Relay for system integration
Microprocessor-based advanced control
Professional operator interface
Safety Features:
Electric Probe Low Water Cut-Off protection
Dual high limit controls (automatic and manual reset)
Manual reset high limit with 210°F maximum setpoint
Combination Temperature and Pressure Gauge
Pressure Relief Valve (shipped loose for field installation)
CSD-1 compliant gas train
Multiple safety interlocks
Emergency shutdown capability
Flame safeguard system
Professional safety engineering
Components Included:
439 Stainless Steel Heat Exchanger with single inlet
Fault Mode Diagnostic Panel with Digital Readout
CSD-1 Compliant Gas Train
Normally Open Fault Relay
Adjustable Automatic Reset High Limit
Manual Reset High Limit (max 210°F setpoint)
12:1 Modulating Air/Fuel Valve
Electric Probe Low Water Cut-Off
Combination Temperature and Pressure Gauge
Insulated Heat Exchanger
Pressure Relief Valve (shipped loose)
Condensate Trap (shipped loose)
2" External Manual Gas Cock (shipped loose)
Installation Requirements:
Gas pressure: Permissible inlet gas pressure per specifications
Maximum normal and minimum inlet gas pressure ratings
Clearances: Per manufacturer specifications for combustible and non-combustible installations
Venting: Condensing boiler venting requirements (PVC/CPVC or stainless steel)
Condensate drainage: pH neutralization may be required per local codes
Electrical service: 480V/3Ph/60Hz by licensed electrician
Gas connection: By licensed professional per local codes
Professional commissioning recommended
Condensing Boiler Considerations:
Produces acidic condensate requiring proper drainage
pH neutralization may be required per local codes
Condensate trap must be properly installed and maintained
Special venting materials required (PVC/CPVC or stainless steel)
Air filter replacement or cleaning per maintenance schedule
Annual maintenance recommended for optimal performance
Water treatment recommended for extended equipment life
Current Status:
Used condition
Protective wrapping present
Ready for installation
Complete with all factory components
Available for immediate delivery
Applications:
Commercial buildings and facilities
Institutional applications (schools, hospitals)
Industrial heating applications
Multi-family residential buildings
Large commercial spaces
District heating systems
Process heating applications
Hydronic heating systems
Radiant floor heating
Snow melting systems
High-efficiency retrofit projects
Advantages of Condensing Technology:
94% thermal efficiency (vs 80-85% for non-condensing)
Significant fuel cost savings
Lower emissions (NOx and CO2)
Environmentally responsible operation
Eligible for energy efficiency incentives
Extended equipment life with stainless steel heat exchanger
Quiet operation
Compact footprint
Features:
Aerco BMK-5000 LGP condensing boiler design
5,000,000 BTU/HR (5000 MBH / 5 Million BTU) maximum input capacity
4,700,000 BTU/HR (4700 MBH / 4.7 Million BTU) net output
140 boiler horsepower equivalent
94% AHRI thermal efficiency rating
12:1 turndown ratio (400,000 to 5,000,000 BTU/HR / 400 to 5000 MBH)
439 stainless steel heat exchanger
Single inlet heat exchanger configuration
High-efficiency condensing technology
Modulating burner with 12:1 turndown
Fault Mode Diagnostic Panel with Digital Readout
CSD-1 compliant gas train
Electric probe low water cutoff
Adjustable automatic reset high limit
Manual reset high limit (210°F max setpoint)
Normally open fault relay
Combination temperature and pressure gauge
Factory-insulated heat exchanger
Wall-mount or floor-standing capability
Professional black and gray cabinet
480V/3Ph/60Hz electrical service
Natural gas (LGP) fuel
Pressure relief valve included (shipped loose)
Condensate trap included (shipped loose)
2" external manual gas cock included (shipped loose)
Used condition
Complete factory-assembled unit
Professional-grade commercial/industrial construction
Watts brand quality
Made in USA (Blauvelt, NY)
Ready for installation
Contact for pricing and availability
* Manufacturer: Aerco (A Watts Brand)
* Product Line: BMK Series Condensing Boiler
* Model Number: BMK-5000 LGP
* Unit Designation: B-2
* Configuration: High-efficiency condensing boiler
