A.O. Smith VW-500, VW-750, VW-1000, VW-1500 User Manual

Domestic Hot Water Boilers

HOT WATER SUPPLY BOILERS

FEATURES

The VF™ Boiler series delivers an exceptionally high thermal efﬁ ciency by combining an advanced modulating venturi-mixing gas/air ratio system with a vertical multi-pass copper heat exchanger for outstanding efﬁ ciency of up to 88% and low NOx emissions that meet or exceed the most stringent standards.

The VF™ Boiler is capable of ﬁ ring from 100% to 25% or a 4:1 turndown ratio of rated input based on the current system demand. The VF’s modulating capability is virtually limitless, and the boiler’s output is based strictly on the current system demand and the required BTUs needed to maintain the desired system set point temperature.

ADVANCED HIGH EFFICIENCY, LOW NOx COMBUSTION TECHNOLOGY

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Venturi-mixing gas/air ratio system - Works with variable speed blower to precisely mix

gas and air throughout ﬁ ring range.

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4:1 Turndown - Fully modulating capability prevents energy-stealing short cycling and

provides smooth system operation with higher overall system efﬁ ciencies

VW-500

through

VW-2000

LOW NOx OPERATION

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Complies with SCAQMD Rule 1146.2 and other Air Quality Management Districts with

similar requirements for low NOx emissions

ADVANCED MODULATING CONTROL

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Includes remote tank temperature control to adjust tank temperature at the boiler -

Modulates the boiler to maintain tank set point temperature within +/-1 degree

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Inﬁ nite boiler output control between 25% and 100% ﬁ re

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LED read out - Provides current boiler status in plain English with help screens

to assist should a fault occur

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Controls every electrical boiler function and provides on board diagnostics

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iCOMM™ Compatible and can be monitored from remote locations.

Call 1.888.WATER02 for more information.

ALL BRONZE FACTORY MOUNTED PUMP

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Integrally mounted, wired, and controlled by the boiler control

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Factory-sized for proper ﬂ ow between boiler and storage tank

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Allows 50 equivalent feet of piping between boiler and tank

HIGH EFFICIENCY COPPER FIN TUBE HEAT EXCHANGER

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Vertical straight tube 2 or 4 pass heat exchanger design encircles the

burner with a combustion chamber that is a 360° wall of copper ﬁ n tubes

■

Rust-resistant operation - All internal heat exchanger non-copper surfaces are glasslined with A. O. Smith’s proprietary porcelain glass coating, which far exceeds competitive coatings

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Impervious to thermal shock

COMPACT, LOW-PROFILE DESIGN

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Zero clearance on sides for 500-1000 models, 4 inches on sides for 1500-2000 models

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Ideal for multiple boiler installations

STANDARD VENT OR DIRECT VENT FLEXIBILITY

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Standard vent conﬁ guration, vertical or horizontal sidewall

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Two-pipe direct venting vertical and/or horizontal sidewall, with all combustion makeup air drawn from outside the building

FACTORY START-UP INCLUDED

■

Required for activating warranty and assuring maximum operating performance. Contact your local sales representative or Authorized Start-Up Agent to arrange a FREE Certiﬁ ed Start-Up.

Revised September 2010

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AOSDG25000

CATEGORY IV LISTED

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Requires AL29-4C gas tight rust resistant

venting material

PROFESSIONAL START-UP SERVICE INCLUDED

■

Assures optimum performance for each

installation

MEETS THE THERMAL EFFICIENCY AND STANDBY LOSS REQUIREMENTS OF THE U. S. DEPARTMENT OF ENERGY AND CURRENT EDITION ASHRAE/ IESNA 90.1

5-YEAR HEAT EXCHANGER WARRANTY

■

For complete information, consult written

warranty or contact A. O. Smith

OTHER VF™ BOILER FEATURES:

■

ASME 160# W.P.

■

ASME RATED PRESSURE RELIEF VALVE, 125 PSI.

■

FACTORY MOUNTED FLOW SWITCH

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MEETS CSD-1 CODE-–FACTORY STANDARD

■

BRASS DRAIN VALVE

■

LOW GAS PRESSURE SWITCH

■

DIGITAL INLET/OUTLET

TEMPERATURE READOUT

■

MANUAL RESET HI-LIMIT

■

ALL BRONZE FACTORY MOUNTED PUMP

Domestic Hot Water Boilers

VF™ BOILER APPROVED OPTIONS:

SEQUENCING PANEL ALARM BUZZER SIDEWALL VENT KITS VERTICAL AND HORIZONTAL

DIRECT VENT KITS

SKID-MOUNTED SYSTEMS DRY CONTACTS FOR ANY

BOILER FAILURE

LOW WATER CUTOFF LP GAS

CUPRO-NICKEL HEAT EXCHANGER TUBES ENERGY MANAGEMENT INTERFACE ADAPTER (BacNet, Lowworks, for other contact Factory)

For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

Model

VW-500 500,000

VW-750 750,000

VW-1000 1,000,000

VW-1500 1,500,000

VW-2000 2,000,000

Note: Maximum gas supply pressure: 13.8˝ W.C. natural gas, 13.8˝ propane Minimum gas supply pressure: 4˝ W.C. natural gas, 8˝ propane Electrical Power: 120 Volts, 60 Hertz, 30 Amps..

Input

Rating

BTU/Hr.

Water

Flow

GPH

LPH

GPH

LPH

GPH

LPH

GPH

LPH

GPH

LPH

40 60 80 90

(22) (33) (44) (90) (56) (67) (78) 1,268 845 634 563 507 423 362 4,797 3,198 2,399 2,132 1,919 1,599 1,371 1,901 1,268 951 845 761 634 543 7,196 4,797 3,598 3,198 2,878 2,399 2,056 2,535 1,690 1,268 1,127 1,014 845 724 9,595 6,397 4,797 4,264 3,838 3,198 2,741 3,780

14,307

5,040

19,076

Temperature Rise - °F (°C)

100 120 140

2,520 1,890 1,680 1,512 1,260 1,080 9,538 7,154 6,359 5,723 4,769 4,088 3,360 2,520 2,240 2,016 1,680 1,440

12,718 9,538 8,478 7,631 6,359 5,450

Revised September 2010

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