Notice – Crown Boiler 24-07 User Manual

Page 5

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NOTICE

All Series 24 cast iron boilers are designed, built, marked and tested in accordance with the

ASME Boiler and Pressure Vessel Code, Section IV, Heating Boilers. An ASME Data Label is

factory applied to each Series 24 jacket, which indicates the boiler Maximum Allowable Working

Pressure (MAWP). Each cast iron section is permanently marked with the MAWP listed on the

boiler's ASME Data Label. Those values for the Series 24 are as follows:

MAWP, Steam - 15 psi

MAWP, Water (USA) - 80 psi

MAWP, Water (Canada) - 45 psi

It is common and acceptable practice to install these boilers in lower pressure systems, below

the boiler MAWP. Therefore, Crown offers safety relief valves set at or below the MAWP of the

boiler. See page 9 for standard safety relief valve set pressures.

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