A O Smith VF Series User Manual

THE ANATOMY OF GREAT PERFORMANCE  
A
E
Combustion  
Venturi-mixing gas/air  
ratio system works with  
variable speed blower to  
precisely mix gas and air  
throughout firing range,  
provides good operation  
with supply gas pressures  
down to 4˝ WC, and  
air intake – self  
adjusting-no air  
shutter required  
B
B
E
is self-adjusting for  
EMC-5000  
Modulating Control  
altitudes up to 6,000  
feet all while providing  
low NOx emissions that  
meet or exceed the most  
stringent standards  
A
C
D
Advanced pre-mix  
burner design  
precisely mixes  
F
air and gas prior to  
ignition for optimum  
performance, with  
low-NOx emissions  
(meets SCAQMD  
Rule 1146.2)  
Heavy-duty ASME 160  
psi copper finned tube  
heat exchanger—Vertical,  
straight tube, multi-pass  
design surrounds the  
burner with a 360° wall  
of copper finned tubing,  
making the entire heat  
exchanger immune to  
thermal shock  
C
G
D
F
All non-heating  
surface heat  
exchanger compo-  
nents are outside  
and away from the  
combustion and flue  
collection areas;  
only the copper fin  
tubes are exposed  
to the products of  
combustion  
G
D
The sealed heat  
exchanger flue collection  
system is constructed  
of AL29-4C stainless  
steel that is immune  
to corrosive flue gases  
COMMERCIAL GAS BOILERS  
CATEGORY IV LISTED  
PROFESSIONAL START-UP SERVICE FURNISHED  
MEETS ASHRAE/IESNA 90.1-1999  
LOW NOx OPERATION  
Up To 88% Efficient,  
Hot Water Supply  
Boiler with  
Modulating Fire  
4:1 Turndown  
I
Meets or exceeds Texas and California  
SCAQMD Rule 1146.2 quality standards  
OTHER VF BOILER FEATURES:  
I
ASME Pressure Relief Valve 125#  
I
Factory-Mounted Flow Switch  
Hot Water Supply  
Applications:  
VW-500 through  
VW-1000  
I
Low Gas Pressure Switch  
I
All Bronze Factory Mounted Pump  
Standard on VW hot water supply models  
I
Digital Inlet/Outlet Temperature Read Out  
I
Manual Reset Hi-Limit  
Hydronic Heating  
Applications:  
VB-500 through  
VB-1000  
WARRANTY:  
I
5 Year Limited Heat Exchanger  
Warranty on VW Models  
I
10 Year Limited Heat Exchanger Warranty  
on VB Models  
VF BOILER APPROVED OPTIONS*  
*For optional boiler equipment see VF Boiler VB and VW spec sheets.  
Versatile Multi-Venting Configurations  
I
Two-pipe direct-venting vertical and /or horizontal sidewall, with all  
combustion makeup air drawn from outside the building  
70 Equivalent Feet Exhaust  
70 Equivalent Feet Intake  
90 Degree Elbows = 10 Feet  
45 Degree Elbows = 5 Feet  
Boot Tee = 5 Feet  
DIRECT-VENTING  
I
Standard-venting, vertical or horizontal sidewall  
100 Equivalent Feet Max  
90 Degree Elbows = 10 Feet  
45 Degree Elbows = 5 Feet  
Boot Tee = 5 Feet  
SIDEWALL  
VENTING  
CONVENTIONAL  
VENTING  
Please consult latest edition  
of the Installation Manual for  
detail venting information  
and maximum/minimum  
venting distances.  
Advanced EMC-5000 Modulating Control  
The EMC-5000 Modulating Control provides true self-diagnostic capabilities to eliminate  
guesswork in troubleshooting. It is the most advanced boiler control we have ever offered,  
setting a new standard for copper boilers.  
EMC-5000 Modulating Control  
I
Modulates the boiler to  
maintain tank temperature  
within +/- 1 degree  
I
Infinite boiler output control  
between 100% to 25% fire  
I
LED read out – provides  
current boiler status in  
plain English with help  
screens to assist should  
a fault occur  
I
Controls and monitors every  
electrical boiler function with  
onboard diagnostics  
Small Size And  
Easy Service  
Small Footprints, Zero Clearance  
To Combustibles On Sides of Unit  
I
Compact design, lightweight  
copper heat exchanger makes  
VF Series easier to move and  
install in limited spaces –  
perfect for retrofits  
I
Fits in an elevator, ideal for  
boiler rooms with limited  
accessonly 30˝ wide  
I
Multiple boiler systems provide  
increased turndown and even  
smoother, more efficient  
system operation  
I
4 boilers w/4:1 Turndown  
=16:1 total system turndown  
Model  
No.  
Input Rating  
Btu/hr  
Output Rating Gallons Per Hour Recovery Height  
Width  
Inches  
Depth W/  
Pump  
Depth W/O  
Pump  
Approx.  
Shipping  
Btu/hr  
Temperature Rise -°F  
Inches  
Inches  
Inches  
Weight (Lbs.)  
40  
100  
140  
362  
VW/  
VB-500  
500,000  
750,000  
421,500  
633,750  
845,000  
1,268 507  
1,901 761  
56  
62  
71  
30  
30  
30  
37.5  
37.5  
37.5  
30  
30  
30  
450  
575  
750  
VW/  
VB-750  
543  
VW/  
VB-1000  
1,000,000  
2,535 1,014 724  
Ac-U-Temp A total hot water supply  
system using VF Series Boilers  
With Ac-U-Temp, A. O. Smith makes it as easy as possible  
to install a complete packaged hot water supply system,  
combining 88% efficient VF Series Boilers with A. O. Smith  
storage tanks. A. O. Smith offers a wide range of available  
boiler/storage tank combinations using the Ac-U-Temp  
system. There are a number of standard boiler and tank  
configurations with tanks up to 1,000 gallons, or we can  
custom design and build an Ac-U-Temp system with tanks  
up to 10,000 gallons to meet your specifications and  
application requirements. Ac-U-Temp systems are shipped  
fully assembled, pre-piped and pre-wired. All the installer  
has to do is make the flue, gas, electrical and water  
connections, so field errors are minimized.  
Consult your A. O. Smith representative for more  
information on the wide range of available boiler/storage  
tank combinations using the Ac-U-Temp system.  
Examples of  
Ac-U-Temp  
Systems  
For complete specifications on the VF Series, consult the  
specification sheets at www.hotwater.com or contact your  
local A. O. Smith sales representative.  
500 Tennessee Waltz Parkway  
Ashland City, TN 37015  
ACGBR00307 ©2007 A. O. Smith Corporation  
A. O. Smith reserves the right to make product changes or improvements at any time without notice.  
Printed in U.S.A  

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