Raypak 503-2003, 504-2004 User Manual

Models 504 thru 2004

Category I with vertical vent

Models 503 thru 2003

Category IV Venting

Up to

87%

thermal efficiency!

Raypak’s Next Generation
Modulating Boiler

Time-honored technologies unite with cutting-edge advancements in
Raypak’s new 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 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 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.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
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
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.

True Modulation

Modulation is nothing new to Raypak, we have honed our gas modu­lation 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 effi­ciency is maintained through out the firing rate and actually increases
during part load, right when you want it! The MVB automatically self­tunes 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

.

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 and easy component access make

service simple

•

All models indoor/outdoor certified

• Complete cabinet protects all controls and wiring

• Meets all current Low NOx regulations,including the new

2010 SCAQMD revisions

•

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

Category I*-up to 85% efficiency

Category IV-87% efficiency

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

1. Control Panel

Fully enclosed controls and wiring protect
against damage or vandalism.Cabinet design
affords easy access to controls for installation
and service.

2.Temp-Tracker Mod Control

This factory-mounted multi-function control
delivers precise load-tracking with selectable
mode displays that are easy to access and read.

3. Universal Diagnostics Board

12 LEDs monitor up to 22 safety
circuits and store up to 256 fault codes.

4.Weather-Proof Jacket

Heavy gauge galvanized steel with
a UV-resistant Polytuf powder coat finish is
impervious to weather and corrosion.

5. Combustion Air Fan

Cast aluminum, non-sparking construction.

6.Vent Pressure Switch

Monitors vent pressure and provides safe shut
down if back pressure is excessive.

7. Minimum Clearance Requirements

Only one inch of side clearance is required from
combustible surfaces.

8.Vertical Heat Exchanger

Cylindrical, multi-pass heat exchanger captures
all radiant energy,eliminating the need for
heavy refractory.

9. Rugged All-Bronze Headers

The proven choice for all applications.

10.Tube Sheet Construction

Eliminates the repair & maintenance problems
associated with rolled-tube construction. Easy,
cost-effective component replacement.

11.Viewing Port

Allows easy burner inspection.

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25

3

10

4

6

9

7

8

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Cold Water Solutions

Cold Water Start – For applications that

require reliable protection against harmful con­densation caused by frequent, extended, cold
water start-ups.Raypak’s Cold Water Start pro­tection system utilizes a proportional three­way valve to bypass water from the boiler out-

let to the inlet during start-up,when the sys­tem return water temperature is below the minimum acceptable
level. (See Cat. #1000.19)

Cold Water Run – For applications requir-

ing constant condensation protection. Raypak’s

Cold Water Run system utilizes a variable-

speed pump to inject just the right amount of

water from the main system loop into the boil-

er to maintain the optimum inlet temperature.

This approach allows the full capacity of the

boiler to be utilized to meet the system load,
while at the same time continuously maintaining the optimum inlet
water temperature to prevent condensation.(See Cat.#1000.19)

Multi Boiler Solutions

Y-200 Boiler Sequencer – Provides addi-

tional functionality for multiple-boiler installa­tions.Controls up to 8 MVB boilers with full
PID logic. LonMark certified interface ensures
seamless compatibility with LonWorks
Building Management Systems (BMS)
(See Cat. #5100.22)

TempTracker Mod+ – Controls up to 16
Raypak MVBs with P or PID logic.Automatic or
manually selectable lead-lag boiler operation.
TempTracker Mod+ monitors and displays sup­ply water temperatures on all applications
including outdoor temperature when outdoor
reset mode is selected. (See Cat. # 5100.22)

State of the art European combustion technology

Optional Equipment

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