Boiler Control - Four tN4, Four Modulating Boiler & DHW/Setpoint

The Boiler Control 284 is designed to operate up to four boilers to accurately maintain a target water temperature. The 284 operates both condensing & non-condensing boilers that are either modulating, single stage or two stage to provide a flexible, cost effective mixed boiler plant solution with better system performance. The target water temperature is based on outdoor temperature reset or a fixed setpoint for space or process heating applications. Additional loads supplied by the 284 include domestic hot water & fixed setpoint heating. Boiler equal run-time rotation, stand-by primary pump operation & pump exercising all increase boiler plant reliability. The 284 communicates with a Building Automation System (BAS) using BACnet® or Modbus® for remote monitoring & adjustment capability. tekmarNet® Thermostats or a tN4 Gateway 485 can be added to optimize system performance & provide remote monitoring capability. Features: BACnet® or Modbus® communication Boiler Isolation Valves Combustion air damper control Condensing & non-condensing boiler groups Control up to four boilers DHW Priority Energy, flow and pressure monitoring Modulating, single stage or two stage Outdoor Temperature Reset Primary pump sequencing Programmable Schedules Setpoint operation tekmarNet® 4 Compatible Specifications: Control: Microprocessor control. This is not a safety (limit) control Packaged weight: 5.5 lb. (2490 g) Dimensions: 8-1/16" H x 11-1/8" W x 2-15/16" D (204 x 282 x 74 mm) Enclosure: Blue PC+ABS plastic with metal top & bottom conduit connection walls, NEMA type 1 Approvals: CSA C US, meets class B: ICES & FCC Part 15, BTL Listed Ambient conditions: Indoor use only, 32 to 122°F (0 to 50°C), <90% RH Non-condensing Power supply: 115 V (ac) ±10%, 60 Hz, 18 VA Primary pump relays: 230 V (ac) 10 A, 1/2 hp Boiler pump / valve & IDHW pump relays: 230 V (ac) 5 A, 1/3 hp Boiler Stage, Auxiliary & Alert relays: 230 V (ac) 5 A, 1/6 hp Calls: 24 V (ac) or Short Included: Outdoor Sensor 070 and 2 of Universal Sensor 082 Optional: tekmar type: 071, 078, 082 Warranty: Limited 3 Year Warranty