Lochinvar 497 - 2067 service manual Copper-finSpecifications, Installation & Service Manual, Notes

Installation & Service Manual

Ratings (continued)

Copper-fin Specifications

Model Number					Vent Size
	Input	Water	Water Connections	Gas Connections
Note: Change “N” to	MBH	Content Gallons			(Note 1)
“L” for L.P. gas models
CWN497	495	1.7	2"	1 1/4"	6"
CWN647	645	2.0	2"	1 1/4"	8"
CWN747	745	2.1	2"	1 1/4"	8"
CWN987	985	2.2	2 1/2"	2"	10"
CWN1257	1255	2.6	2 1/2"	2"	12"
CWN1437	1435	2.9	2 1/2"	2"	12"
CWN1797	1797	3.3	2 1/2"	2"	14"
CWN2067	2065	3.6	2 1/2"	2"	14"

NOTICE Maximum allowed working pressure is located on the rating plate.

Notes:

1.Copper-fins require special gas venting. Use only the vent materials and methods specified in the Installation and

Service Manual.

2. The Copper-fin is orificed for operation up to 2000 feet altitude. The appliance will be derated 4% per 1000 feet above 2000 feet elevation. Consult the factory for installations above 2000 feet elevation.

HIGH ALTITUDE LABEL

Figure B High altitude label location_water heater

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