MVB® Modulating Vertical Water Heater, 2503 - 4003

Time-honored technologies unite with cutting-edge advancements in Raypak’s MVB modulating vertical water heater.  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.
 WH7-2503   2,501,000 10"
 WH7-3003   3,000,000 10"
 WH7-3503   3,500,000 12"
 WH7-4003   4,000,000 12"

Features:
  • 86% Thermal Efficiency at Full Rate.
  • Positive vent pressure, Condensing Appliance.  Cat IV Vent Required.
  • Bronze headers with copper finned tube heat exchanger standard. 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 Z21.10.3.
  • Minimum Inlet Water Temperature: 120°F.
  • Maximum Setpoint: 150°F.
  • Electronic Modulation, up to 7:1 Turndown.
  • VERSA IC® Control Package with 7" Display.
  • 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 (11.7 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.
  • Whisper-Quiet Operation.
  • Proudly Assembled in the USA.

 

Options:

  • 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 Run
  • Condensate Neutralizer (Z-12)

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