268
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Discontinued - Replaced By: 294
Part of the Multi-Staging Controls Series
Ordering Code: 268
UPC: 779655026801
Boiler Control, Nine Stage Boiler and DHW, Setpoint
The boiler control 268 is designed to stage multiple boilers using outdoor temperature reset. It can be used in applications ranging from baseboard or mixed radiant heating systems, to dedicated domestic hot water heating in commercial buildings. This control regulates a single heating water temperature through outdoor temperature reset and/or Setpoint/DHW target control. It is capable of controlling (stage and rotate) up to 9 on/off boilers as well as the system pump.
Features
- Outdoor temperature reset, setback input for energy savings
- warm weather shut down, automatic boiler differential
- Control up to 9 on-off boilers, boiler pump operation (optional)
- Exercising, DHW pump or valve operation
- DHW priority (optional), equal run time rotation
- Quick setup for easy installation and programming of control, User comfort adjustment to increase or decrease building space temperature
- Advanced settings to fine-tune building requirements
- Powered system pump output
- Test sequence to ensure proper component operation
| Specifications | |
|---|---|
| Agency Approvals | CSA C US, meets class B: ICES & FCC Part 15 |
| Ambient Conditions | Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent Non-condensing |
| Control Type | Microprocessor control, this is not a safety (limit) control |
| Demand | 20 to 260 V (ac) 2 VA |
| Dimensions | 6 5/8 IN H x 7 9/16 IN W x 2 13/16 IN D (170 x 193 x 72 MM) |
| Enclosure Material | Blue PVC plastic |
| Enclosure NEMA Rating | NEMA 1 |
| Hydronic - HVAC Control Type | Boiler Control |
| Power Supply | 115 V (ac) plus / minus 10 percent, 50/60 Hz, 600 VA |
| Relay | 230 V (ac) 5 A, 1/3 hp |
| Sensor | NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892 |