A. O. Smith DB-1350 User Manual

®

Hydronic Heating Boilers

UP TO 82% EFFICIENT H Y DRONI C HEATING BOILERS

MODELS

DB-720

through

The Dura-Max® series offers excellent performance and low-profi le design fl exibility for
both new construction and retrofi t applications. A double-row, integral-fi nned copper
tube heat exchanger provides exceptional heat transfer effi ciency. Each unit features a
small footprint with a built-in draft diverter for extra clearance to simplify installation.
Reliable, quiet, drawer-mounted stainless steel burners resist corrosion, improve
access for easy maintenance.

FEATURES

100% ALL NON-FERROUS HEAT EXCHANGER WATERWAYS

■

All waterways 100% copper, brass or bronze

■

Won’t rust, resists thermal shock

■

Heavy-duty bronze castings and copper heat exchange tubes

■

Bronze removable return bends for easy access and inspection

of individual tubes

GASKETLESS WET SECTION

■

Unique “O”-ring design compresses to form water-tight seal

positioned away from and outside the combustion chamber

■

Isolated location offers optimum protection and years of service

DRAWER-MOUNTED, STAINLESS STEEL DURA-MAX® BURNERS

■

Quiet operation and effi cient, reliable design

■

Protects against corrosion and condensation deterioration

■

Easy slide-out burner tray simplifi es cleaning and maintenance

DB- 1810

COMPACT, LOW-PROFILE DESIGN

■

Built-in draft diverter provides extra clearance in tight, retrofi t installations

■

Clean, compact jacket design for easy access and assembly

■

Cool to touch and approved for combustible fl oors

INTERMITTENT ELECTRONIC IGNITION

■

Eliminates standing pilot, saves energy

■

Includes power ON/OFF switch

CODE COMPLIANCE

■

Meets or exceeds the thermal effi ciency and standby loss requirements

of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1

TEN-YEAR HEAT EXCHANGER LIMITED WARRANTY

■

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

June 2011R

Low Lead Content

Page 1 of 4

AOSHG30300

®

Hydronic Heating Boilers

OTHER DURA-MAX® FEA TURES



MANUAL RESET, HIGH LIMIT



SAFETY FLOW SWITCH

ASME-RATED PRESSURE RELIEF VALVE 50#



REDUNDANT GAS VALVE

DURA-MAX® OPTIONS

 CSD-1
 CALIFORNIA CODE
 THERMAL BALANCER PUMP DELAY
 PANEL MOUNTED INLET/OUTLET DIAL
THERMOMETERS AND PRESSURE GAUGE
 MODULATING FIRING
 DUAL STAGE FIRING
 RIGHT END GAS AND/OR WATER CONNECTIONS
 CUPRO-NICKEL HEAT EXCHANGER
 SIDEWALL VENT KITS
 LOW WATER CUTOFF

STANDARD MODELS

MINIMUM CLEARANCES TO COMBUSTIBLES ­ALL MODELS

Inches CM

TOP 12
WATERSIDE
BLANK SIDE

REAR

VENT

FRONT

* Natural gas only
Gas supply pressure: 13:8” w.c. maximum, 5.5” w.c. minimum
Electrical requirements: 120 VAC, 15 Amps

18

6
6
6

30.5

45.7

15.5

15.5

15.5

Alcove

June 2011R

www.hotwater.com

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AOSHG30300