DSMK-500/700

Devotion's fully premixed low-NOx condensing hot water boiler features a compact inline tube structure, taking up minimal space. The heat exchanger is made of precision-crafted 316L stainless steel, providing excellent corrosion resistance and long service life. The operating efficiency reaches up to 108%, with NOx emissions below 30mg/m³. The atmospheric design eliminates the need for regulatory inspections, making it suitable for installation in basements, rooftops, or green spaces. It is widely used for "coal-to-gas" conversions, "low-NOx retrofits," and for heating and hot water in small to medium-sized enterprises.

Low-NOx Retrofit:
Ideal for replacing low-NOx boilers in small and medium-sized centralized heating systems.

Commercial Applications:
Suitable for hotels, restaurants, commercial buildings, and leisure facilities that require heat sources.

Public Institutions:
Provides heating and hot water for schools, hospitals, office buildings, and other commercial spaces with small heating needs.

Product Structure

• Intelligent Controller:
  The intelligent control system allows wide-range automatic proportional adjustment, ensuring energy-efficient operation.

• DC Variable Frequency Fan:
  Automatically adjusts speed and airflow based on load changes, ensuring stable boiler output that matches demand.

• Zero Gas Pressure Valve:
  Automatically adjusts gas flow based on load, maintaining a constant air-fuel ratio during variable load operations.

• Stainless Steel Finned Tubes:
  Maximizes heat exchange area, enhances heat transfer, and prevents corrosion and scaling.

• Heat Exchanger:
  Made of 316L stainless steel, the heat exchanger offers high heat transfer efficiency, corrosion resistance, and long service life.

• Metal Fiber Burner:
  The fully premixed surface combustion technology divides the flame into numerous evenly distributed small flames, reducing combustion temperature and NOx generation.

Product Features

• Compact Design, Small Footprint:
  The boiler can be easily transported and installed, with minimal setup time.

• Modular Design:
  The modular design allows easy disassembly and reassembly, making installation possible in spaces with restricted access. It can be installed near the point of use, eliminating the need for a dedicated boiler room and reducing flue system investment.

• Lightweight Design:
  The lightweight equipment is easy to transport and install, ensuring quick setup and timely project completion.

• Comprehensive Installation Documentation:
  Comes with complete installation instructions for easy setup. The boiler is pre-tested and pre-adjusted at the factory, allowing for quick on-site adjustments.

• Rigorous Factory Testing:
  The boiler undergoes over 20 tests, including pressure stability, gas circuit tightness, and a 30-minute full-load burn test before shipping.

Fully Premixed Surface Combustion Technology

• NOx Emissions Below 30mg/m³:
  The fully premixed combustion of natural gas and air ensures complete combustion. Automatic load adjustment combined with the multi-pass flue gas circulation structure of the heat exchanger effectively lowers combustion temperature and increases heat utilization. While the boiler operates efficiently, NOx emissions are reduced to below 30mg/m³, far below the strictest emission standards.

High-Efficiency Multi-Stage Heat Exchange / Condensing Technology

• 108% Efficiency, More Hot Water:
  After combustion, the high-temperature flue gas undergoes multiple heat exchange stages before reaching the low-temperature condensing zone. The low-temperature finned tubes absorb both sensible heat and the latent heat released from water vapor condensation, achieving up to 108% efficiency. In comparison, traditional boilers typically have efficiencies of only 85%.

Stainless Steel Finned Tube Heat Exchanger

• Corrosion Resistant, Anti-Scaling, Long Lifespan:
  Made from 316L stainless steel, this heat exchanger offers excellent thermal conductivity, three times higher than regular steel. A protective film forms on the surface during operation, enhancing corrosion resistance and ensuring a long service life. During production, the base pipe and fins are welded using fully automated laser welding, resulting in a strong, high-penetration weld with minimal metallurgical changes, preventing crevice corrosion. The six-pass anti-scaling water path design ensures optimal heat exchange between flue gas and water.

Multiple Safety Protection Systems

• Flameout Protection:
  Uses ion probes or optical sensors to detect the presence of a flame. If no flame is detected, the gas supply is automatically shut off, ensuring safety.

• Over-Temperature Protection:
  Automatically shuts down the boiler if the water temperature exceeds 95°C, preventing damage to the boiler body and components.

• Flue Gas Temperature Protection:
  Monitors flue gas temperature, stopping the system if it exceeds the safety limit.

• Gas Pressure Protection:
  Prevents issues related to gas pressure fluctuations, ensuring stable flame conditions and preventing flame failure or reignition problems.

• Gas Leak Protection:
  Automatically shuts off the gas supply if a gas leak is detected, locking the burner.

• Anti-Freeze Protection:
  When the water temperature drops to 4°C, the boiler will automatically heat to 15°C to prevent freezing (requires the boiler to be powered on).

Intelligent Touch Control System

• 24/7 Constant Temperature Hot Water:
  The advanced intelligent control system allows comprehensive control of the boiler, including variable speed pump control, multi-loop control, time programming, and temperature settings. It meets heating requirements while reducing energy consumption.

• Simple User Interface:
  The 7-inch color LCD touchscreen replaces traditional multi-button controls, offering a clear and intuitive interface for easy operation.

• Constant Temperature Control:
  Automatically adjusts the boiler’s output based on heating demand, saving 20-30% more energy than traditional systems.

• Automatic Fault Alarms:
  Real-time monitoring detects any abnormal system parameters, triggering alarms and preventing accidents.

• Real-Time Monitoring:
  Monitors parameters such as temperature, pressure, flow, and pump status, allowing remote control and monitoring via the internet.

Multi-Unit Linkage Control System

• Modular Operation for Energy Savings and Safety:
  Multiple boilers can be linked together for modular operation, automatically adjusting output based on demand to avoid overproduction and improve efficiency.

• Balanced Workload:
  The system balances workloads across all units, ensuring stable operation and preventing downtime during maintenance, with uninterrupted heating.

• Remote Monitoring and Alerts:
  The system provides real-time monitoring and alerts, ensuring safe and efficient operation. The IoT platform allows for remote management of the boiler system.