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.
- Submittal Sheet
- Installation
- BAS Integration
Features
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BACnet® or Modbus® communication
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Boiler Isolation Valves
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Combustion air damper control
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Condensing & non-condensing boiler groups
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Control up to four boilers
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DHW Priority
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Energy, flow and pressure monitoring
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Modulating, single stage or two stage
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Outdoor Temperature Reset
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Primary pump sequencing
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Programmable Schedules
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Setpoint operation
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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 |
Modulating outputs | 4 x 0-10 V (dc) 500 Ω minimum load impedance / 4-20 mA 1 kΩ max load impedance |
Calls | 24 V (ac) or Short |
Sensors | NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 |
-Included | Outdoor Sensor 070 and 2 of Universal Sensor 082 |
-Optional | tekmar type: 071, 078, 082 |
Warranty | Limited 3 Year Warranty |