A.O. Smith VWH0500N, VWH0750N, VWH1000N, VWH1500N, VWH2000N User Manual

4.5 (2)

High Efficiency

Commercial Water Heater

WATER HEATERS

FEATURES

The VF™ Water Heater series delivers an exceptionally high thermal efficiency by combining an advanced modulating venturi-mixing gas/air ratio system with a vertical multi-pass copper heat exchanger for outstanding efficiency of up to 87% and low NOx emissions that meet the most stringent standards.

The VF™ Water Heater is capable of firing 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 water heater’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

Venturi-mixing gas/air ratio system - Works with variable speed blower to precisely mix gas and air throughout firing range.

4:1 Turndown - Fully modulating capability prevents energy-stealing short cycling and provides smooth system operation with higher overall system efficiencies

LOW NOx OPERATION

Complies with SCAQMD Rule 1146.2 and other Air Quality Management Districts with similar requirements for low NOx emissions

ADVANCED MODULATING CONTROL

Includes remote tank temperature sensor to install in the storage tanks – allows the tank temperature to be set at the water heater

Modulates the burner to maintain the desired tank temperature within +/-1 degree

Infinite burner firing rate, modulates between 25% and 100% fire

Building Management System (BMS) Integration with 0 - 10 VDC Input allows BMS to control water heater firing rate

ALL BRONZE FACTORY SIZED PUMP STANDARD

Integrally pump control maximizes overall system efficiency by eliminating standby heat loss and converts residual heat into usuable hot water

Factory-sized for proper flow between the water heater and storage tank

Allows 50 equivalent feet of piping between the water heater and tank

HIGH EFFICIENCY COPPER FIN TUBE HEAT EXCHANGER

Vertical heat exchanger design encircles the burner with a combustion chamber that is a 360° wall of copper fin tubes

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

Impervious to thermal shock

Heavy-Duty gasketless heat exchanger design

COMPACT, LOW-PROFILE DESIGN

Zero clearance on sides vertical heat exchanger design allows small footprint and units that can fit through doors into elevators

Ideal for multiple water heater installations and side by side installation

FLEXIBLE VENTING SOLUTIONS

Multiple Category II and IV direct and sidewall venting options

Common Venting possible with engineered vent systems

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 Certified Start-Up.

A.O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA

www.hotwater.com

VWH-500

through

VWH-2000

HLW

Page 1 of 4

Revised July 2014 AOSDG25010

A.O. Smith VWH0500N, VWH0750N, VWH1000N, VWH1500N, VWH2000N User Manual

CATEGORY II and IV LISTED

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 LIMITED HEAT EXCHANGER WARRANTY

For complete information, consult written warranty or contact A. O. Smith

OTHER VFWATER HEATER FEATURES:

ASME CERTIFIED “HLW” STAMPED 160# W.P.

ASME RATED PRESSURE RELIEF VALVE, 125 PSI.

FACTORY MOUNTED FLOW SWITCH

CONTACTS FOR 0-10 VDC BMS EXTERNAL CONTROL

CONACTS FOR ALARM OR ANY FAILURE

DIGITAL INLET/OUTLET TEMPERATURE READOUT

MANUAL RESET HI-LIMIT

ALL BRONZE FACTORY SUPPLIED PUMP

VF™ OPTIONS:

SEQUENCING PANEL - Can manage 1 to 4 modulating units

-Includes remote Tank sensor and sensor well

-Uses the 0-10Vdc to control the water heater’s firing rate

-Modulates the water heater(s) firing rate to meet system demand

-Provides Cascade/Lead-Lag operation when multiple units are connected

ALARM BELL

LOW WATER CUTOFF W/MANUAL RESET AND TEST

PROPANE (LP) GAS

VENT KITS:

-Horizontal Exhaust Cap

-Horizontal Air Intake Cap

-Horizontal Direct Vent Kit

-Category II Conversion Kit (Required for Common Venting)

International Voltage (230V 50Hz)

INLET GAS PRESSURE

MODEL

NATURAL

 

LP

Max.

Min.

Max.

Min.

 

w.c.

w.c.

w.c.

w.c.

500 -1000

14.0

4.0

13.0

11.0

 

 

 

 

 

1500 - 2000

14.0

4.0

14.0

8.0

 

 

 

 

 

Maximum inlet gas pressure must not exceed the value specified. Minimum value listed is for the purposes of input adjustment.

High Efficiency

Commercial Water Heater

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Vertical Venting

Sidewall Venting*

Direct Venting*

Using Category IV

Horizontal venting up to

Horizontal or vertical vent-

vent materials

50 equivalent feet using

ing up to 50 equivalent feet.

 

 

 

 

 

Category IV vent materials.

Draws combustion air up to

 

 

 

 

 

 

 

 

 

50 feet from the same pres-

 

 

 

 

 

 

 

 

 

sure zone using Category IV

 

 

 

 

 

 

 

 

 

vent materials.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ducted Air Vertical*

 

Ducted Air Horizontal*

Vertical venting up to 50 equivalent

 

Vents horizontally up to 50 equivalent

feet. Draws combustion air up to

 

feet and draws combustion air up to

50 feet from a different pressure

 

50 feet from a different pressure zone

zone using Category IV vent

 

using Category IV vent materials.

materials.

 

 

 

 

 

 

 

 

Common Venting*

Vents multiple units horizontally through one vent termination and draws combustion air from the room, roof or sidewall. Category IV to II conversion kit required.

*Requires factory-supplied vent kit.

See Specification Chart for specific venting sizes based on venting materials category type.

AMP DRAW DATA

Model

Blower &

Pump FLA*

Approximate Total

Controls

Amps @ 120 VAC

500

6.7

8.8

15.5

750

6.7

8.8

15.5

1000

6.7

8.8

15.5

1500

6.5

8.8

15.3

2000

6.5

8.8

15.3

*Standard Pump Supplied with Water Heaters

A. O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA

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AOSDG25010

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