Foreword, Recovery Capacities | A.O. Smith 405, 400, 402, 401, 403, 404

TABLE 4: RECOVERY CAPACITIES

				TEMPERATURE RISE - DEGREES °F (°C)
	Input Rating	Water	40°F	50°F	60°F	70°F	80°F	90°F	100°F	110°F	120°F	130°F
MODEL	BTU/Hr. (kW)	Flow	(22.2°)	(27.7°)	(33.3°)	(38.8°)	(44.4°)	(50°)	(55.5°)	(61.1°)	(66.7°)	(72.2°)
GW - 1000	990,000 (290.1)	GPH	2520	2016	1680	1440	1260	1120	1008	916	840	775
		LPH	9526	7620	6350	5443	4763	4234	3810	3462	3175	2930
GW - 1300	1,300,000 (380.9)	GPH	3309	2647	2206	1891	1655	1471	1324	1203	1103	1018
		LPH	12508	10006	8339	7148	6256	5560	5005	4547	4169	3848
GW - 1500	1,500,000 (439.5)	GPH	3818	3055	2545	2182	1909	1697	1527	1388	1273	1175
		LPH	14432	11548	9620	8248	7216	6415	5772	5247	4812	4442
GW - 1850	1,850,000 (542.0)	GPH	4709	3767	3139	2691	2355	2093	1884	1712	1570	1449
		LPH	17800	14239	11865	10172	8902	7912	7122	6471	5935	5477
GW - 2100	2,100,000 (615.3)	GPH	5345	4276	3564	3055	2673	2376	2138	1944	1782	1645
		LPH	20204	16163	13472	11548	10104	8981	8082	7348	6736	6218
GW - 2500	2,490,000 (729.6)	GPH	6338	5071	4225	3622	3169	2817	2535	2305	2113	1950
		LPH	23958	19168	15971	13691	11979	10648	9582	8713	7987	7371

TABLE 5: PUMPING PERFORMANCE GUIDE

			GB MODELS-FLOW, HEAD LOSS AND TEMPERATURE RISE
	20 Deg. F Rise		30 Deg. F Rise		40 Deg. F Rise		Maximum Flow Rate			Minimum Flow Rate
	GPM	PD-FT	GPM	PD-FT	GPM	PD-FT	GPM	PD-FT	Deg. F	GPM	PD-FT	Deg. F
MODEL		Head		Head		Head		Head	Rise		Head	Rise
GB - 1000	83	5.1	55	2.7	41.6	1.5	154	12.2	11	42	1.5	40
GB - 1300	109	7.2	72.8	4.2	54.6	3.2	154	14.5	14	55	3.2	40
GB - 1500	126	10.1	84	6.3	63	4.3	154	16.3	17	64	4.3	40
GB - 1850	154	18.5	103.6	10.1	77.7	6.4	154	18.5	20	78	6.4	40
GB - 2100	n/a	n/a	117.6	14.5	88	8.3	154	21.3	23	89	8.3	40
GB - 2500	n/a	n/a	139.4	18.5	104.6	11.6	154	23.2	28	105	11.6	40

Note: GW models (GB optional) are equipped with pumps capable of handling 50 equivalent feet (15.2 m) of normal pipe fittings.

FOREWORD

Detailed installation diagrams are in this manual. These diagrams will provide the installer with a reference of materials needed and a suggested method of piping. IT IS NECESSARY THAT ALL WATER AND GAS PIPING, AND THE ELECTRICAL WIRING BE INSTALLED AND CONNECTED AS SHOWN IN THE DIAGRAMS.

CHECK DIAGRAMS THOROUGHLY BEFORE STARTING INSTALLATION TO AVOID POSSIBLE ERRORS AND MINIMIZE TIME AND MATERIALS COST. SEE FIGURES 1 THROUGH 5 AND TABLES 1, 2, AND 3.

This design complies with the current edition of ANSI Z21.13-CSA 4.9 for Gas-Fired Low-Pressure Steam and Hot Water Boilers.

MAKE SURE THE GAS ON WHICH THE BOILER WILL OPERATE IS THE SAME AS THAT SPECIFIED ON THE BOILER RATING PLATE.

The boiler installation must conform to these instructions and the local code authority having jurisdiction. In the absence of local codes, the installation must comply with the latest editions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and the National Electrical Code, NFPA 70 or CAN/CSA B149.1, and CSA 2 C22.1. The former is available from the Canadian Standards Association, 8501 East Pleasant Valley Road, Cleveland, OH 44131, and both documents are available from the National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.