Lochinvar® KNIGHT™ WHN Series WHN400 Gas Fired Water Boiler, 94.4% Thermal AFUE, 6.5 gal Capacity, 120 VAC, 1 ph Phase

Lochinvar® KNIGHT™ Gas Fired Water Boiler, WHN Series, 120 VAC, 60 Hz Frequency, 1 ph, 94.4% Thermal AFUE, 80 to 399 MBtu/hr Input, 377 MBtu/hr Gross Heating BTU, 6.5 gal Capacity, 3/4 in Gas, 1-1/2 in Water Connect, 4 in Air Inlet Connection, Natural Gas Fuel, Horizontal, Vertical Vent, Chimney/Breeching/Vent Size: 4 in, Direct Spark Ignition, Net BTU Rating: 328 MBtu/hr, Wall Mounting, Dimensions: 35-1/2 in H x 25 in W x 21-3/4 in D

• Smart system digital operating control, multi-colored graphic LCD display with navigation dial and soft key
• 3-boiler set point temperature inputs plus domestic hot water prioritization
• Built-in cascading sequencer for upto 8-boilers with cascade redundancy- multiple size boiler cascade, lead lag, efficiency optimization and front end loading capability
• Outdoor reset control with outdoor air sensor, programmable for 3-reset temperature inputs
• Programmable system efficiency optimizers - SH night back, DHW setback, anti-cycling, outdoor air reset curve, ramp delay, boost temperature and time
• 4 pump control - system pump with parameter for continuous operation, domestic hot water pump, domestic hot water recirculation, domestic hot water pump
• Domestic hot water prioritization - DHW tank piped with priority in the boiler loop, DHW tank piped as a zone in the system with the pumps controlled by the smart system, DHW modulation limiting
• Building management system integration - 0 - 10 VDC input to control modulation or set point, 0 - 10 VDC modulation rate output, 0 - 10 VDC input to enable/disable call for heat
• Access to BMS settings through graphic LCD display
• High-voltage terminal strip are 3-sets of pump contact
• Low voltage terminal strip - 24 VAC device relay, proving switch contacts, flow switch contacts, alarm on any failure contacts, run-time contacts, DHW thermostat contacts, three-space heat thermostat contacts, system sensor contacts, DHW tank sensor contacts, outdoor air sensor contacts, cascade contacts
• 0 - 10 VDC BMS external control contact, 0 - 10 VDC boiler rate output contacts, 0 - 10 VDC variable speed system pump signal input, 0 - 10 VDC signal to control variable speed boiler pump, Modbus contacts
• Time clock
• Data logging - hrs running, space heating, domestic hot water, ignition attempts, last 10-lockouts
• Maintenance reminder - custom maintenance reminder with contractor contact information and installer ability to de-activate service reminder
• Low water flow safety control and indication, password security and customizable freeze protection parameters
• Modulating burner with 5:1 turndown, low-NOx operation
• ASME stainless steel heat exchanger, 30 lb/sq-in ASME pressure relief valve
• Smart system control, condensate trap, automatic reset high limit, adjustable high limit with manual reset, boiler circulating pump, zero clearances to combustible materials
• 12 years limited warranty, five-years warranty on parts

Specifications