Columbia CWH series, Installation, Operation And Maintenance Manual, Page: 6 / 56

LWLCWH COLUMBIA BOILER COMPANY REV. 13106
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INTRODUCTION
Series L and WL Water Tube Boilers
The Columbia Models L and WL are water tube boilers designed for hot water, and/or low pressure
steam applications. These units are manufactured to the specifications set forth by Section IV of the
ASME Boiler and Pressure Vessel Code. Boilers are inspected and stamped for conformity to require-
ments of the National Board of Boiler and Pressure Vessel Inspectors. All boilers are designed to be
fired using No. 2 fuel oil, and/or natural, manufactured, or liquid propane (LP) gas, and are powered
by standard AC electrical service.
CWH Series Steam Boiler
The CWH Series is a steam boiler used for indirect hot water applications. This boiler classification
consists of all L and WL Series Boilers providing heat transfer to one or two coils, depending on boil-
er size. The boiler is a self contained unit allowing a steam cavity above the water line for expansion.
Columbia hot water and low pressure steam boilers are typically shipped knocked down (unassem-
bled), but are also available factory packaged. All boilers are furnished with a jacket kit, burner, and
boiler trim. Boiler trim consists of the operating and limit controls, pump and/or low water cut off
(LWCO) controls, a safety valve, and a smokehood for all WL Series Boiler Models, and Model L-32.
Factory packaged boilers are fully assembled and test fired.