MVB® Modulating Vertical Water Heaters 503A-2003A

• 87% 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 LCD 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 (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.
• 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)

• Brochure, CWS/CWR, 1000.19
• Brochure, Electronic Controllers, 5100.22
• Brochure, H WH 503A-2004A, 2503-4003, 3400.11
• User Guide, Raypak Touch Screen, 5000.74

• I&O Manual, B-39, 5000.68
• I&O Manual, B-62, 5000.71
• I&O Manual, B-85 B-86 ProtoNode, 5000.73
• I&O Manual, CWS/CWR, 1000.57
• I&O Manual, H WH 503A-2003A, 3400.531
• I&O Manual, Temp-Tracker Mod+ Hybrid, 5000.69
• I&O Manual, VERSA IC Control, 5000.72

• How to Use Your Raypak IPL, 9001.10
• IPL, H WH 503A-2003A, 9300.744
• IPL, Pump Kits, 9300.100

• Submittal, Temp-Tracker Mod+, 5100.32
• Submittal, Temp-Tracker Mod+, 5100.32
• Submittal, WH 503A-2003A, 3500.282
• Submittal, WH 503A-2003A, 3500.282

• Specifications, WH 503A-2003A, 3500.952
• Specifications, WH 503A-2003A, 3500.952

• Warranty, H WH 503-2003, H WH 504-2004, 1900.16
• Warranty, Temp-Tracker Mod+, 1900.18

• REVIT 2015, MVB H WH 1253A-2003A
• REVIT 2015, MVB H WH 1253A-2003A CWR

• Horsepower and Heat Transfer Area, 8900.90
• South Coast Air Quality Management District