Progressive sequencing step controller with step indicator lights. Number of steps shall be determined by number of circuits and boiler kW. Non-fused disconnect. Shunt-trip device. Door interlock. Ground fault. Connections: One electrical supply connection (single point), supplying power to all heating elements and control devices. One (1) threaded or flanged steam outlet. One (1) threaded feed water connection. One (1) threaded blowdown connection. One (1) threaded water column drain connection. Trim: ASME-rated pressure relief valve. One (1) threaded or flanged steam stop valve. One (1) spring-loaded check valve and one (1) ball-type stop valve to control feed water. One (1) quick-opening blowdown valve and one (1) slow-opening blowdown valve. One (1) water column drain valve. (OPTIONAL) Building automation system interface: Manufacturer shall provide programmable logic controller to enable building automation system to control boiler, monitor boiler, and display boiler status and alarms. Control features shall include remote adjust pressure set point. Monitoring features shall include low water level alarm (manual reset), real-time pressure display, real-time display of circuits energized, and ground fault alarm. Programmable logic controller shall include BACnet/IP, BACnet/MSTP, TCP/IP, or ModBus interface to match building automation system protocol. Programmable logic controller shall include LCD screen for local control and display. Quality control: Manufacturer shall perform final quality control check. Quality control check shall include wire termination test and control continuity test. Manufacture shall include signed quality control checklist as integral part of boiler manual. EXECUTION – EXAMINATION Verify service and code requirements.
Progressive sequencing step controller with step indicator lights. Number of steps shall be determined by number of circuits and boiler kW. Non-fused disconnect. Shunt-trip device. Door interlock. Ground fault. Connections: One electrical supply connection (single point), supplying power to all heating elements and control devices. One (1) threaded or flanged steam outlet. One (1) threaded feed water connection. One (1) threaded blowdown connection. One (1) threaded water column drain connection. Trim: ASME-rated pressure relief valve. One (1) threaded or flanged steam stop valve. One (1) spring-loaded check valve and one (1) ball-type stop valve to control feed water. One (1) quick-opening blowdown valve and one (1) slow-opening blowdown valve. One (1) water column drain valve. (OPTIONAL) Building automation system interface: Manufacturer shall provide programmable logic controller to enable building automation system to control boiler, monitor boiler, and display boiler status and alarms. Control features shall include remote adjust pressure set point. Monitoring features shall include low water level alarm (manual reset), real-time pressure display, real-time display of circuits energized, and ground fault alarm. Programmable logic controller shall include BACnet/IP, BACnet/MSTP, TCP/IP, or ModBus interface to match building automation system protocol. Programmable logic controller shall include LCD screen for local control and display. Quality control: Manufacturer shall perform final quality control check. Quality control check shall include wire termination test and control continuity test. Manufacture shall include signed quality control checklist as integral part of boiler manual. – EXECUTION EXAMINATION Verify service and code requirements.