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