Modulating Vertical Boilers
& Water Heaters
Raypak has taken the design technology for modulating boilers to the next level with the all new MVB. By precisely matching the latest control and combustion components, the optimum fuel air ratio is maintained throughout the entire range of load-tracking operation, even with low and fluctuating gas pressures. A 4:1 turndown capability (503-2003) ensures the exact input to match the heating demand and maximizes efficiency at all firing rates. With all copper and optional bronze waterways, these boilers provide the ultimate in corrosion resistance.

• 12 models from 500,000 to 2,000,000 BTUH
• Up to 85% efficiency (Cat.1*)
• Up to 88.4% part load (Cat. IV)
  
• Small footprint design, less than 5.4 square feet, fits tight spaces and easily replaces larger boilers
  
• Advanced diagnostics and easy component access make service simple
  
• No boiler condensate drain required (proprietary design)
  
• All models indoor/outdoor certified
  
• Complete cabinet protects all controls and wiring
  
• Meets all current Low NOx regulations, including the new 2010 SCAQMD revisions
  
• Suitable for altitudes up to 10,000 ft. (derate above 5,000 ft.)
  
  *Category I with vertical vent, category III with horizontal venting and no extractor.

Options

• Cold Water Start – Automatic bypass prevents internal condensation on start-up (See Cat. #1000.19)
  
• Cold Water Run – Prevents condensation in continuous low-temperature operation (See Cat. #1000.19)
  
• Y-200 Boiler Sequencer – Provides additional functionality for multiple-boiler installations. Compatible with LonWorks® Building Management Systems (BMS) (See Cat. #5100.22)
  
• Temp-Tracker Mod+ – Controls up to 16 Raypak MVBs (See Cat. # 5100.22)

For complete product literature see the Document Library