A.O. Smith VWH0500N, VWH0750N, VWH1000N, VWH1500N, VWH2000N User Manual
WATER HEATERS
High Efficiency
Commercial Water Heater
VWH-500
through
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
VWH-2000
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
HLW
Page 1 of 4
Revised July 2014 AOSDG25010
CATEGORY II and IV LISTED
LL
Maximum
Minimum
■
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 VF™ WATER 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
High Efficiency
Commercial Water Heater
Vertical Venting
Using Category IV
vent materials
Sidewall Venting*
Horizontal venting up to
50 equivalent feet using
Category IV vent materials.
Direct Venting*
Horizontal or vertical venting up to 50 equivalent feet.
Draws combustion air up to
50 feet from the same pressure zone using Category IV
vent materials.
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
Max.
w.c.
P
MODEL
500 -1000 14.0 4.0 13.0 11.0
1500 - 2000 14.0 4.0 14.0 8.0
inlet gas pressure must not exceed the value specified.
value listed is for the purposes of input adjustment.
NATURA
Max.
Min.
w.c.
w.c.
Min.
w.c.
Ducted Air Vertical*
Vertical venting up to 50 equivalent
feet. Draws combustion air up to
50 feet from a different pressure
zone using Category IV vent
materials.
Ducted Air Horizontal*
Vents horizontally up to 50 equivalent
feet and draws combustion air up to
50 feet from a different pressure zone
using Category IV vent 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 &
Controls
Pump FLA*
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
Approximate Total
Amps @ 120 VAC
A. O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA
www.hotwater.com
Page 2 of 4
AOSDG25010
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