A.O. Smith VF User Manual

Page 1
Page 2
The Art Of Flexibility
The new VF Series variable fire copper boilers are designed with one thing in mind: to provide the best value to the customer. As a result, we’re proud to introduce a more installation friendly line that works well in more applications and requires less maintenance.
The secret to the stunning performance of the VF Series is its flexibility. The VF is capable of firing from 100% to 25% or a 4:1 turndown ratio. The boiler’ output is based strictly on the current system demand and required BTUs needed to maintain the desired system set point temperature. The VF’s modulating capability is vir
tually limitless.
s
ef
-
y
ficiency
ficient
The VF Boiler sets a high ef standard by combining thermal efficiencies up to 88% with a smoother overall system operation.
, more energ
Page 3
THE ANATOMY OF GREAT PERFORMANCE
A E
Combustion air intake – self adjusting- no air shutter required
B
EMC-5000 Modulating Control
C
Advanced pre-mix burner design precisely mixes air and gas prior to ignition for optimum performance, with low-NOx emissions (meets SCAQMD Rule 1146.2)
D
All non-heating surface heat exchanger compo­nents ar and away from the combustion and flue collection areas; only the copper fin tubes are exposed to the products of combustion
e outside
Venturi-mixing gas/air ratio system works with variable speed blower to precisely mix gas and air throughout firing range,
B
E
A
D
C
G
F
D
provides good operation with supply gas pressures
down to 4˝ WC, and is self-adjusting for
altitudes up to 6,000 feet all while pr low NOx emissions that meet or exceed the most stringent standards
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
The sealed heat exchanger flue collection system is constr of AL29-4C stainless steel that is immune
osive flue gases
r
to cor
oviding
F
G
ucted
Page 4
COMMERCIAL GAS BOILERS
CATEGORY IV LISTED
Up To 88% Efficient, Hot Water Supply Boiler with Modulating Fire 4:1 Turndown
Hot Water Supply Applications:
VW-500 through VW-1000
Hydronic Heating Applications:
VB-500 through VB-1000
PROFESSIONAL START-UP SERVICE FURNISHED
MEETS ASHRAE/IESNA 90.1-1999
LOW NOx OPERATION
Meets or exceeds Texas and California SCAQMD Rule 1146.2 quality standards
OTHER VF™BOILER FEATURES:
ASME Pressure Relief Valve 125#
Factory-Mounted Flow Switch
Low Gas Pressure Switch
All Bronze Factory Mounted Pump
Standard on VW hot water supply models
Digital Inlet/Outlet Temperature Read Out
Manual Reset Hi-Limit
WARRANTY:
5 Year Limited Heat Exchanger Warranty on VW Models
10 Year Limited Heat Exchanger Warranty on VB Models
VF™BOILER APPROVED OPTIONS*
*For optional boiler equipment see VF Boiler VB and V W spec sheets.
SHORT TRIM
Versatile Multi-Venting Configurations
wo-pipe direc
T combustion makeup air drawn from outside the building
70 Equivalent Feet Exhaust 70 Equivalent Feet Intake 90 Degr 45 Degree Elbows = 5 Feet Boot Tee = 5 Feet
Standar
100 Equivalent Feet Max 90 Degr 45 Degree Elbows = 5 Feet Boot Tee = 5 Feet
ee Elbows = 10 Feet
d
ee Elbows = 10 Feet
- venting vertical and /or horizontal sidewall, with all
t
DIRECT- VENTING
- venting, vertical or horizontal sidewall
ALL
SIDEW VENTING VENTING
CONVENTIONAL
Please consult latest edition of the Installation Manual for detail venting information and maximum/minimum venting distances.
Page 5
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
Modulates the boiler to maintain tank temperature within +/- 1 degree
Infinite boiler output control between 100% to 25% fire
LED read out – provides current boiler status in plain English with help screens to assist should a fault occur
Controls and monitors every electrical boiler function with onboard diagnostics
SHORT TRIM
Small Size And Easy Service
Small Footprints, Zero Clearance To Combustibles On Sides of Unit
Compact design, lightweight copper heat exchanger makes VF Series easier to move and install in limited spaces – perfect for retrofits
Fits in an elevator, ideal for boiler rooms with limited access — only 30˝ wide
Multiple boiler systems provide increased turndown and even smoother system operation
4 boilers w/4:1 T
6:1 total system turndown
1
=
, more efficient
urndown
Page 6
Model Input Rating Output Rating Gallons Per Hour Recovery Height Width Depth W/ Depth W/O Approx.
No. Btu/hr Btu/hr T
VW/
VB-500 500,000 421,500 1,268 507 362 56 30 37.5 30 450
W/
V
VB-750 750,000 633,750 1,901 761 543 62 30 37.5 30 575
W/
V
VB-1000 1,000,000 845,000 2,535 1,014 724 71 30 37.5 30 750
emperature Rise -°F
40 100 140
Inches Inches Pump Pump Shipping
Inches Inches Weight (Lbs.)
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.
Examples of Ac- U-Temp Systems
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.
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
www.hotwater.com
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
Loading...