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284 | Boiler Control - Four tN4, BAS, Four Boiler, DHW & Setpoint | Tekmar

Brand: TekmarSKU: 284

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Overview Details for 284

Boiler Control - Four tN4, BAS, Four 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 and 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 and provide remote monitoring capability.

Features

Outdoor temperature reset, programmable schedules
Boiler Isolation Valves
Setpoint operation
Energy, flow and pressure monitoring
tekmarNet^® 4 compatible, control up to four boilers
BACnet^® or Modbus ^® communication, primary pump sequencing
Combustion air damper control
Condensing and non-condensing boiler groups, modulating, single stage or two stage
DHW priority

Specifications

Item Number	284
Brand	Tekmar
Category	Boiler / DHW Controls
Agency Approvals	CSA C US, meets class B: ICES & FCC Part 15, BTL Listed
Ambient Conditions	Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), less than 90 percent RH Non-condensing
Calls	24 V (ac) or Short
Control Type	Microprocessor control, this is not a safety (limit) control
Dimensions	8-1/16" H x 11-1/8" W x 2-15/16" D (204 x 282 x 74 mm)
Enclosure Material	Blue PC+ABS plastic with metal top & bottom conduit connection walls
Enclosure NEMA Rating	NEMA 1
Hydronic - HVAC Control Type	Boiler Control
Modulating Output	4 x 0-10 V (dc) 500 ohms minimum load impedance / 4-20 mA 1 k ohms max load impedance
Power Supply	115 V (ac) plus / minus 10 percent, 60 Hz, 18 VA
Pump Relay	230 V (ac) 5 A, 1/3 hp
Relay	Boiler pump,Valve, IDHW pump 230 V (ac) 5 A, 1/3 hp, primary pump 230 V (ac) 10 A, 1/2 hp, Alert relay 230 V (ac) 5 A, 1/6 hp
Sensor	NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892