1. VF™ Series Boiler

2. Introducing the 88% Efficient
Modulating VF Boilers
The Art Of Flexibility

3. The VF Series is designed with one thing in mind: to provide the best value to the customer
The most system-forgiving copper boiler ever to carry the A. O. Smith name - thanks to the unit’s ability to modulate its burner and control BTU output

4. VF Series Boilers – Features
Up to 88% efficiency with fully modulating burner 4:1 turndown for lower operating costs and efficient system operation

5. VF Series Boilers – Features
Inputs from 500,000 to 1,000,000 BTU to meet a wide range of water heating or hydronic applications
Available Models:
Hot Water Supply
VW 500
VW 750
VW 1000
Hydronic Heating
VB 500
VB 750
VB 1000

6. VF Series Boilers – Features
Advanced Digital Control System for accurate temperature control and easy diagnostics
Displays current boiler status
Boiler fault read-out
Help screens if needed
Controls every electrical boiler function from ignition to pump operation

7. VF Series Boilers – Features
Compact design and venting flexibility for installation versatility

8. VF Series Boilers – Features
Heavy duty copper finned tube heat exchanger for superior performance and reliability

9. VF Series Boilers – Features
Venturi-mixing gas/air ratio system precisely mixes air and gas for optimum performance

10. VF Boilers – Standard Features
Professional start-up service included
Meets ASME CSD-1 standard
Meets ASHRAE/IESNA
Low-NOx Operation
Meets or exceeds Texas and California SCAQMD Rule quality standards

11. VF Boilers – Standard Features
ASME Pressure Relief Valve
Factory-Mounted Flow Switch
Low Gas Pressure Switch
All bronze factory mounted pump
Standard on VW models, optional on VB models
Digital Inlet/Outlet Temperature Readout
Manual Reset Hi-Limit

12. VF Boilers – Warranties
5-Year Limited Heat Exchanger Warranty on VW Models
10-Year Limited Heat Exchanger Warranty on VB Models

13. Let’s Take A Closer Look…

14. High Efficiency up to 88%
Marked improvement in overall system efficiency due to reduced energy-wasting short cycling
Smoother overall system operation due to reduced wide temperature swings

15. Modulating Burner
Capable of firing from 100% to 25% or a 4:1 turndown ratio of rated input based on the current heating demand
Virtually limitless modulating capability
Output based strictly on the current system demand and required BTUs needed to maintain the desired system set point temperature

16. Modulating Burner Prevents energy-stealing short cycling
Provides smoother system operation and higher overall system efficiencies
Modular systems with multiple VF units will see even larger turndowns
2 boilers = 8:1 turndown
3 boilers = 12:1 turndown
4 boilers = 16:1 turndown
4,000,000 BTUs
Total footprint: 10’ x 6’

17. Advanced EMC-5000 Modulating Control
Helps you control every boiler function:
Prevents energy-stealing short cycling
Starting the blower
Igniting and modulation of the main burner
Controlling boiler temperature
Boiler pump operation

18. Advanced EMC-5000 Modulating Control
Comprehensive LED displays temperature and current boiler status in easy-to-read text
Precise temperature management of ±1ºF
Self-diagnostics eliminate guesswork, pinpoint problems for troubleshooting.
Help screens assist with initial boiler set-up and troubleshooting if needed

19. Heat Exchanger
The entire heat exchanger is ASME code approved and inspected with a maximum pressure rating of 160 PSI

20. Heat Exchanger
Unique AL29-4C stainless steel corrosion proof combustion chamber/flue collection system assures only copper fin tubing is exposed to the products of combustion
Vertical straight tube multi-pass heat exchanger design encircles the burner with a combustion chamber that is a 360º wall copper fin tubes
Maximum heat transfer is achieved as all hot flue gases are forced through this near solid wall of copper fin tubing

21. Heat Exchanger
All key and serviceable heat exchanger components are outside the combustion chamber and flue collection system– a distinct advantage over the competition
This design feature allows components to be:
Protected from the flame and harsh flue gas
More readily accessible for service
Provides additional years of worry-free operation with reduced service requirements

22. Combustion System
Uses state of the art venturi-mixing gas/air ratio system with variable speed blower
Advanced combustion system design precisely mixes air and gas prior to ignition for optimum performance
Meets SCAQMD Rule approved for California and Texas

23. Combustion System
The VF’s venturi-mixing system combined with its 360º metal fiber burner provides:
Smooth burner light off
Consistent heat distribution and reliable performance under all conditions
Quiet burner operation
Low NOx ratings– meets or exceeds the most stringent air quality standards
Clean air and Green building friendly

24. Small Footprint The VF’s vertical straight tube design:
Allows for a large heat transfer area to maximize efficiency
Maintains a small footprint of 30˝ X 30˝ – ideal for retrofit applications and multiple boiler installations
Fits easily into an elevator for non-ground-floor boiler room applications
Can be easily handled with a standard appliance dolly

25. Small Footprint
Certified with 0˝ clearance to both right and left sides, allowing multiple units to sit side by side while using as little floor space as possible
Provides the power needed to meet the most demanding commercial hydronic heating needs or commercial domestic hot water heating requirements–all within a space that other types of boilers would never fit

26. Flexible Venting & Direct Vent Options
Note: All modes use 4˝ PVC combustion air intake piping and 6˝ AL29-4C venting material

27. Four Direct-Vent Configurations
Gives the Specifier and Installer optimum venting flexibility
Safe, two-vent system allows clean, uncontaminated air to be drawn directly into the unit
Can save substantial installation costs when standard venting configurations are not practical
Note: All modes use 4˝ PVC combustion air intake piping and 6˝ AL29-4C venting material

28. Sidewall or Vertical Vent Configurations
Using boiler room air for combustion and venting either vertical or horizontal is ideal for retrofit and cost-saving installations
Note: All modes use 4˝ PVC combustion air intake piping and 6˝ AL29-4C venting material

29. Service
Easy access for servicing the new VF unit was a major design concern
All serviceable parts are accessible from the front of the boiler
Service access panels or doors provide ample room to get the job done

30. Ac-U-Temp Systems A Total Hot Water Supply System Using VF Series Boilers
Install a complete packaged hot water supply system, combining 88% efficient VF Series Boilers with A. O. Smith storage tanks. Systems available:
Up to 1,000 gallons
Built to order
Factory engineered and pre-assembled to your specifications
Fully assembled, pre-piped and pre-wired–all the installer has to do is make the flue, gas, electrical and water connections

31. Ac-U-Temp Systems A Total Hot Water Supply System Using VF Series Boilers
Standard boiler and tank configurations using tanks up to 1,000 gallons
OR…
We can CUSTOM DESIGN an Ac-U-Temp System with tanks up to 10,000 gallons

32. Modulating Fire 4:1 Turndown
Up to 88% Efficient with
Modulating Fire 4:1 Turndown
The Art Of Flexibility