O. Smith July 2011R GW/GWO-300 THROUGH GW/GWO-750 PG 1 OF 4 AOSDG25200 Commercial Gas Boilers GW SERIES INDOOR MODELS GWO SERIES OUTDOOR MODELS PG 2 OF 4 MODEL NUMBER BTU INPUT PER HOUR DIMENSIONS IN INCHES EXHAUST VENT AIR INLET WATER CONN. GAS PIPE (SEE DRAWINGS ABOVE) WIDTH A B C GW SERIES INDOOR MODELS GW-300 300,000 5 5 1-1/2 3/4 29-1/2 14-13/16 9 12 GW-400 399,900 6 6 1-1/2 1 35-3/4 17-15/16 9 14-3/4 GW-500 500,000 6 6 2 1 42 21-1/16 9 14-3/4 GW-650 650,000 8 8 2 1-1/4 51-3/8 25-3/4 9 14-3

July 2011R PG 3 OF 4 AOSDG25200 Commercial Gas Boilers SUGGESTED SPECIFICATION The hot water supply boiler(s) shall be an A. O. Smith Genesis® Model GW ___________________ having an input rating of __________________ BTU/hr. and capable of supplying no less than _________________GPH at a 100.F temperature rise when fired with Natural/Propane gas. The boiler shall bear the ASME “H” stamp and shall be National Board registered for 160 PSI working pressure. The boiler shall be test certified at 84%

O. Smith or an approved equal. Boiler(s) shall be gas-fired, and design certified by the Canadian Gas Association or an approved/accredited independent rating laboratory, capable of supplying_GPH (LPH) at 100°F (56°C) temperature rise equipped to burn_gas, with input rating of_BTUH(KW)/hr. and bearing the ASME code symbol. Boiler(s) shall be up flow type having all non-ferrous waterways, and employing a copper finned heat exchanger and a tightly wound copper coil combustion chamber with 160 p

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O. Smith OTHER VF™BOILER FEATURES: • ASME 160# W.P. • ASME PRESSURE RELIEF VALVE 125# • FACTORY MOUNTED FLOW SWITCH • MEETS CSD-1 CODE-–FACTORY STANDARD • BRASS DRAIN VALVE • LOW GAS PRESSURE SWITCH • DIGITAL INLET/OUTLET TEMPERATURE READ OUT • MANUAL RESET HI-LIMIT • ALL BRONZE FACTORY MOUNTED PUMP VF™ BOILER APPROVED OPTIONS: . SEQUENCING PANEL . ALARM BELL . SIDEWALL VENT KITS . VERTICAL AND HORIZONTAL DIRECT VENT KITS . SKID-MOUNTED SYSTEMS . DRY CONTACTS FOR ANY BOILER FAILURE . LOW WATER C

• Check for water leaks around elements and proper operation when boiler is filled. • Replace insulation and cabinet panel. CHECKLIST Before calling for service, check the following points to see if the cause of trouble can be identified and corrected. Reviewing this checklist may eliminate the need of a service call and quickly restore the boiler to service. The illustration on page 5 identifies the location of most of the boiler components. BE SURE TO TURN OFF THE ELECTRICITY WHEN CHECKING EQU

Fully tested for a maximum working pressure of 150 psi Æffvmwre twsimnc ( L'tïifÎl if Rotin L',v Performance independently certified by The Hydronics Institute r Coil Surface (sq. ft.) Tank Volume (Gal) 40 50 60 75 114 Net Weight (lbs) 168 196 196 224 415 Filled Weight (lbs) 514 623 704 861 1370 Model MT040GBR 29-3/4 MT050GBR 26 36 29-3/4 36-3/4 5-3/8 27-1/2 MT065GBR 22 59-1/4 53-1/8 60 5-3/8 27-1/2 MT080GBR 24 59 52-7/8 59-3/4 5-3/8 27-1/2 MT120GBC 28-1/4 62-1/2 55-3/4 63-1/4 6

O. Box 14818 Philadelphia, PA 19134 Phone: (215) 535-8900 Fax: (215) 535-9736 Visit us on the web: MT-8/06-RI-(20 M) PN980517