Untitled [cleaverbrooks.com]

High and low gas pressure switches shall be provided. A second motorized safety shutoff valve with plugged leakage test connection shall be provided. A valve proving system shall be used or vent valve shall be located between the safety shutoff valves. Gas pressure regulator can be offered as an option. 4. Burner turndown, excess air, and CO on natural gas to be as follows: TD, CO, and EXCESS ... ................
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