A.O. Smith XB-2000 User Manual download pdf

Automatic Circulating Water Heaters

FEATURES

The A. O. Smith high efficiency condensing XP Water Heater utilizes a state-of-the-art heat exchanger

and control technology to provide large volumes of hot water for demanding commercial and

industrial potable hot water applications. The all stainless steel water tube heat exchanger construction

allows the XP Water Heater to operate in a continuous condensing mode while maximizing longevity

and delivering thermal efficiencies as high as 99% when operating in low temperature applications.

A unique multi-burner design is control sequenced and modulated to produce turndown rates of

up to 20:1. Precise temperature control and accurate load matching produce smooth system

operation and eliminates wasteful short cycling and temperature overshooting.

ADVANCED MULTI-BURNER, LOW NOx COMBUSTION TECHNOLOGY

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

and air throughout ﬁring range

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 for XWH1000 through XWH2000 and Rule 1146.1 for

XWH2600 and XWH3400, and other air quality management districts with similar

requirements for low NOx emissions

ADVANCED SOLA CONTROL

Large touch screen user interface

Factory standard with MODBUS protocol connections

The latest in energy saving algorithms

Includes remote tank temperature control to adjust tank temperature at the water heater -

modulates the water heater to maintain tank set point temperature within +/-1 degree

Water heater output control features 20:1 turndown ratio on models 2 million btuh and up,

10:1 turndown ratio on models 1.7 million btuh and down

ALL-BRONZE FACTORY-MOUNTED PUMP(S)

Integrally mounted, wired, and controlled by the water heater control

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

Allows 50 equivalent feet of piping between water heater and tank

MULTI-PASS/MULTI-BURNER CONDENSING STAINLESS STEEL HEAT EXCHANGER

Utilizes leading-edge multi-pass water tube heat exchanger to maximize heat transfer

Designed for fully condensing operation throughout the heating range

All heating surfaces are 316L stainless steel to provide a long and trouble-free service life

Saves both fuel and operating cost with every heating cycle

Impervious to thermal shock

DIRECT VENT FLEXIBILITY

Direct vent up to 100 equivalent feet of pipe

Sidewall or vertical

Lower installation cost with approved CPVC/PVC venting material – uses CPVC for first

10 feet and PVC thereafter.

Approved for use with UL approved AL29-4C

stainless steel venting materials

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.

Please note: The XP water heater models XWH -1000 thru 3400 are certified to the ANSI Z21.10.3-CSA 4.3 water

heater standard. These models are approved for potable water heating applications only and cannot be used in

closed loop space/hydronic heating applications. For closed loop hydronic heating applications use XP Boiler

models XB-1000 thru 3400 that are certified to the ANSI Z21.13-CSA 4.9 boiler standard and are approved

hydronic heating applications.

XWH-1000

through

XWH-3400

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AOSBD25000

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Summary of Contents

Page 1 - XWH-3400

Automatic Circulating Water HeatersFEATURESThe A. O. Smith high efficiency condensing XP Water Heater utilizes a state-of-the-art heat exchangerand co

Page 2 - AOSBD25000

Automatic Circulating Water HeatersPage 2 of 6www.hotwater.com AOSBD25000A. O. Smith Corporation reserves the right to make product changes or improve

Page 3 - Page 3 of 6

RECOVERY CAPACITIESAutomatic Circulating Water HeatersPage 3 of 6www.hotwater.com AOSBD25000A. O. Smith Corporation reserves the right to make product

Page 4 - Page 4 of 6

Automatic Circulating Water HeatersPage 4 of 6www.hotwater.com AOSBD25000A. O. Smith Corporation reserves the right to make product changes or improve

Page 5 - ELECTRICAL REQUIREMENTS

AIR INTAKE TERMINATION (PVC) PART #sModels Pipe Size Combustion Air Intake(Elbow)XWH 10006" 321764-000XWH 1300XWH 17008" 321764-001XWH 2000X

Page 6 - XWH SUGGESTED SPECIFICATION

Automatic Circulating Water HeatersPage 6 of 6www.hotwater.com AOSBD25000A. O. Smith Corporation reserves the right to make product changes or improve