Show compound vacuum-pressure gauge and vacuum breaker on all hot water converters. Provide high limit control that will shut off steam supply to heat exchanger with a 10 F maximum rise of outlet temperature above set point. Vacuum relief valve. Pressure relief valve. Thermometers in hot water outlet and return lines.
Drain valves with hose thread adapter to drain shell and tubes.
Design heater steam supply, condensate piping and trap to prevent coil flooding. Provide isolating valves, unions, and fittings, to permit easy removal of coils or heater. D. Piping System Cleaning Steam and condensate piping shall be thoroughly flushed before placing in service, to remove dirt, rust, scale or other contaminants. Remove the works of all traps, regulators and reducing valves. Provide blank covers where necessary.