A.O. Smith GW/GWO-750 Boiler User Manual


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Commercial Gas Boilers
Revised November 2008 PG 3 OF 4
www.hotwater.com
AOSDG25200
OTHER GENESIS
®
FEATURES
FACTORY-INSTALLED CIRCULATING PUMP
Pre-wired, integrally controlled by EMC-5000 control
Adjustable pump time delay allows removal of usable residual
heat during stand-by cycle, virtually eliminating stand-by heat loss
ASME PRESSURE RELIEF VALVE 125#
FACTORY INSTALLED FLOW SWITCH
ALTERNATE THERMOSTAT TERMINALS (24V)
MANUAL RESET HIGH LIMIT
BLOCKED FLUE SWITCH
BLOCKED INLET SWITCH
AIR PROVING SWITCH
GENESIS
®
OPTIONS
CSD-1 CODE
NEW YORK CODE
CALIFORNIA CODE
ALARM BELL
ALL-BRONZE CIRCULATING PUMP
HARD WATER PUMP
BRONZE HEADERS
STACK RACK
LOW WATER CUT-OFF
EXTENDED VENTING KIT
SEQUENCING CONTROL PANEL (FOR 2-8 BOILERS)
COMBUSTIBLE FLOOR SHIELD
DRY CONTACTS FOR ANY BOILER FAILURE
CUPRO-NICKEL HEAT EXCHANGER
CSA CERTIFIED VENT KIT
GENESIS
®
VENTING VERSATILITY
DIRECT-VENTING
SIDEWALL VENTING CONVENTIONAL VENTING
For the most current Genesis venting distances/information,
consult the Genesis Product Manual, available through your local
A. O. Smith representative, or online at www.hotwater.com.
MODEL
NUMBER
BTU INPUT
PER HOUR
RECOVERy — GALLONS PER HOUR AT °f TEMPERATURE RISE
40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140°
GW/GWO-300 300,000 761 609 507 435 380 338 304 277 254 234 217
GW/GWO-400 399,900 1014 811 676 580 507 451 406 369 338 312 290
GW/GWO-500 500,000 1268 1015 845 725 634 564 507 461 423 390 362
GW/GWO-650 650,000 1649 1319 1099 942 824 733 659 600 600 507 471
GW/GWO-750 750,000 1902 1522 1268 1087 951 845 761 692 634 585 544
Gas Supply Pressure: 13.8” W.C. maximum natural and propane; 4.5” W.C. minimum natural; 11.0” W.C. minimum propane.
Genesis boilers are approved for installation on noncombustible flooring in an alcove with minimum clearance to combustibles of:
3 inches sides, and back; 3 inches top, front alcove; 6 inches vent.
For installation on combustible flooring use the optional Combustible Floor Kit.
Genesis boilers must be connected to a single phase dedicated line source that is: 120 volts, 60 hertz and 20 amps.
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