Raypak 750 User Manual download pdf (Page 2)

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 performance.

Small space, not a problem. The MVB 503A thru 2003A has the smallest

installed footprint of any vertical boiler, only 5.4 square feet. MVB mod-

els 2503 thru 4003 are just 11.7 square feet. Raypak’s MVB is built with

commercial-grade components and materials. From our structural steel

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 32” door opening making it the perfect

choice for those hard to reach retrofit projects. Now is the perfect time

to take a closer look at Raypak.

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 (504A-2004A). Our category I solution is the perfect

replacement for your retrofit applications. This reduces the installed

cost by using existing category I venting or chimney. Installation could-

n’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% thermal efficiency (503A-2003A) and

85% thermal efficiency (2503-4003) at full fire–the highest possible 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 sys-

tem - the first defense against harmful condensation. Raypak’s evapora-

tor system collects and re-evaporates condensate which may form dur-

ing initial start-up or brief periods of cold-water operation, eliminating

the need for a boiler condensate drain. This saves you money on instal-

lation costs as well as the inconvenience of dealing with multiple con-

densate drains.

True Modulation

Modulation is nothing new to Raypak, we have honed our gas modula-

tion experience for over 65 years. The Raypak MVB will precisely track

the heating load with its built-in Versa IC

Integrated Control platform,

eliminating costly overshooting. Utilizing the latest technology for the

blower-gas valve package, the optimum fuel-air ratio is maintained

throughout the entire range of the load-tracking operation. Now with

up to 7:1 turndown (503A thru 4003 Cat IV) ensures efficiency is main-

tained throughout 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 quali-

ty 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.

Key Features

• 16 models from 500,000 to 4,000,000 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 7:1 (503A thru 4003 Cat. IV)

turndown

• Multiple pump outputs - Boiler, System, and Indirect DHW.

• 0-10 VDC BMS Interface (setpoint or direct drive).

• Built-in cascade function for up to 4 boilers.

• Built-in outdoor reset functionality.

• Modbus BMS port.

• Engineered with precisely matched system components

• Small installed footprint design fits tight spaces and easily replaces

larger boilers

• Advanced diagnostics center, real English fault codes

• Indoor/outdoor construction

• Complete cabinet protects all controls and wiring

• Low NOx combustion system

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

• With all copper and bronze waterways (optional on some

models), the MVB is available in boiler and water heater configurations

• Inline combustion air filter (MERV8)

• All water heaters are low lead (<.25%) certified.

Category I*-up to 85% efficiency

Category IV-up to 88.4% efficiency

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

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Raypak 750 User Manual Page 2

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