MVB® Modulating Vertical Hydronic Boilers 503A-2003A

Time-honored technologies unite with cutting-edge advancements in Raypak’s MVB modulating vertical boiler.  Small space is no longer a problem, and our compact design fits through a 32” door opening to make it the perfect choice for those hard-to-reach retrofit projects.  The MVB is built to last, from the structural steel base to the stainless steel flue wrapper.  The built-in VERSA IC® Integrated Control platform precisely tracks the heating load to eliminate costly overshooting, and the 7:1 turndown ensures high efficiency throughout the firing rate and actually increases efficiency during part load, right when you want it.

BASIC DATA
Model
Full Input in BTUH
Flue Dia.
 H7-503A  500,000 6"
 H7-753A  750,000  6"
 H7-1003A  999,000  6"
 H7-1253A  1,250,000  8"
 H7-1503A  1,499,000  8"
 H7-1753A  1,750,000  8"
 H7-2003A 1,999,000
 8"

Features

  • 86.2% Thermal Efficiency at Full Rate; Up to 88.4% at Part Load.
  • Positive vent pressure, Condensing Appliance.  Cat IV Vent Required.
  • Cast-Iron Headers with Copper Finned-Tube Heat Exchanger standard. Brass Headers and Cupro-Nickel tubes available as options. ASME Section IV constructed and stamped, National Board registered.
  • CSA Low-Lead certified, less than 0.25% Lead.
  • Certified to ANSI Z21.13.
  • Minimum Inlet Water Temperature: 120°F.
  • Maximum Operable Outlet Water Temperature: 235°F.
  • Electronic Modulation, up to 7:1 Turndown.
  • VERSA IC® Control Package with Built-In Outdoor Reset Function and LCD Display, Including System Sensor, Indirect Sensor & Indirect Supply Sensor.
  • Status Display Lights.
  • Cascade Control of up to 4 units, no external sequencer required.
  • Diagnostics Center with History, English, no codes.
  • Modbus RTU BMS port (RS485).
  • 0-10 VDC BMS Interface (Setpoint or Direct Drive).
  • All models indoor/outdoor construction.
  • Certified under SCAQMD Rule 1146.2.  Meets all Low NOx regulations.
  • Engineered with precisely matched system components.
  • Smallest installed footprint (5.4 square feet) design fits tight spaces and easily replaces larger boilers.
  • 100% Factory Fire Tested.
  • Complete cabinet protects all controls and wiring. Tough, rust-resistant powder-coat finish.
  • Suitable for altitudes up to 10,000 ft. (derate above 2,000 ft.).
  • No boiler condensate drain required (proprietary design)
  • Available for natural gas or propane.
  • Integral Combustion Air Filter (MERV8).
  • Multiple Pump Outputs – Boiler Pump, System Pump, Indirect Pump.
  • Whisper-Quiet Operation.
  • Proudly Assembled in the USA.

Options:

  • Outdoor air Sensor (B-32)
  • BACNet IP, BACnet MS/TP, Modbus TCP, N2 Metasys (B-85)
  • Lonworks (B-86)
  • Alarm with 4” Bell (E-5)
  • Low Water Cutoff (F-10)
  • Cold Water Start (not for potable water systems)
  • Cold Water Run
  • Condensate Neutralizer (Z-12)
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Specifications

Warranties

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Documents