279
Part of the 279 Series
Ordering Code: 279
UPC: 779655027907
Steam Control, One Stage
The Steam Control 279 is designed to operate a single steam boiler using Outdoor Temperature Reset. It can be used in single pipe steam applications as well as applications using a tankless DHW coil. This control regulates the on time of a steam boiler through Outdoor Temperature Reset control. It is capable of controlling a single on/off steam boiler.
- Large LCD display
- 24 hour, 5-1-1, 7 day schedule
- Indoor temperature feedback (with optional indoor sensor), manual override
- CSA approved for use in USA and Canada
- Two alert level relays
- Outdoor temperature reset, warm weather shut down
- Two or four schedule events per day
- Built-in programmable timer
- DHW tankless coil 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 80 percent non-condensing, for temperatures up to 87 degrees F (31 degrees C), decreasing linearly to 50 percent relative humidity at 104 degrees F (40 degrees C), altitude less than 6560 FT (2000 m), Installation Category II, Pollution Degree 2 |
| Control Type | Microprocessor control, this is not a safety (limit) control |
| Dimensions | 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm) |
| Enclosure Material | Blue PVC plastic |
| Enclosure NEMA Rating | NEMA 1 |
| Hydronic - HVAC Control Type | Steam Control |
| Power Supply | 115 V (ac) plus / minus 10 percent, 50/60 Hz, 3.5 VA |
| Relay | 230 V (ac) 5 A, 1/3 hp, pilot duty 240 VA |
| Sensor | NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892 |