Raypak 503 Raypak’s Next Generation Modulating Boiler, True Modulation, Flexibility, Key Features

Category I*-up to 85% efficiency Category IV-up to 88.4% efficiency

Raypak’s Next Generation

Modulating Boiler

Time-honored technologies unite with cutting-edge advancements in Raypak’s MVB® modulating vertical boiler. Never before has a vertical boiler provided both the installer and building owner such installation flexibility, ease-of-commissioning, reliability and long-term perform- ance. Small space, not a problem. The MVB has the smallest installed footprint of any vertical boiler, only 5.4 square feet. Raypak’s MVB is built with commercial-grade components and materials. From our steel channel base to our stainless steel flue wrapper, you can tell the MVB is built to last. It’s easy to handle and install, but still user friendly to service. Our compact design fits through a 30” door open- ing making it the perfect choice for those hard to reach retrofit proj- ects. Now is the perfect time to take a closer look at Raypak.

True Modulation

Modulation is nothing new to Raypak, we have honed our gas modu- lation experience for over 50 years. The Raypak MVB will infinitely track the heating load precisely with it’s built in TempTracker Mod control, eliminating costly overshooting. Utilizing the latest European technology for the blower-gas valve package, the optimum fuel-air ratio is maintained throughout the entire range of the load-tracking operation. Our smooth 4:1 turndown (503 thru 2003) ensures effi- ciency is maintained through out the firing rate and actually increases during part load, right when you want it! The MVB automatically self- tunes to accommodate the widest range of gas supply pressures. The high quality integrated blower-gas valve is self-correcting and allows smooth operation with fluctuating gas supply pressures. The Raypak MVB is cutting edge technology with atmospheric simplicity.

Flexibility

Small diameter vents and industry-leading vent length allowances afford greater vent location options, thus reducing wasted space. Vent versatility is further enhanced by the self-tuning combustion system which compensates for unusual chimney and vent configurations.

Category I* -CSA-certified 84% boiler and up to 85% water heater models available. Our category I solution is the perfect replacement for your retro-fit applications. This reduces the installed cost by using existing category I venting or chimney. Installation couldn’t be easier; all connections are on the back of the unit. Start-up is a snap, it’s as close to plug-n-play as a boiler can get.

Category IV -CSA-certified 87% efficiency at full fire–the highest pos- sible for non-condensing boilers (Up to 88.4% at part load!) When the job requires high efficiency, our category IV solution meets your needs.

At the heart of every Raypak MVB is a unique integral evaporator system - the first defense against harmful condensation. Raypak’s evaporator system collects and re-evaporates condensate which may form during initial start-up or brief periods of cold-water operation, eliminating the need for a boiler condensate drain. This saves you money on installation costs as well as the headache of dealing with multiple condensate drains.

Key Features

•12 models from 500,000 to 2,000,000 BTUH

•Up to 85% efficiency (Cat. I*);

•Up to 88.4% efficiency (Cat. IV)

•No boiler condensate drain required (proprietary design)

•Lowest minimum required inlet water temperature (120F)

•Modulating gas valve and burner, up to 4:1 (503 thru 2003) turndown

•Engineered with precisely matched system components

•Smallest installed footprint (5.4 square feet) design fits tight spaces and easily replaces larger boilers

•Advanced diagnostics center, real English fault codes

•All models indoor/outdoor certified

•Complete cabinet protects all controls and wiring

•Meets all current Low NOx regulations

•Suitable for altitudes up to 10,000 ft. (derate above 5,000 ft.)

•With all copper and optional bronze waterways, the MVB is available in boiler and water heater configurations

•Inline combustion air filter (MERVB)

*Category I with vertical vent, category III with horizontal venting and no extractor.

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