508
Discontinued - Replaced By: 518
Part of the Thermostats Series
Ordering Code: 508
UPC: 779655050801
508 Thermostat
The Thermostat 508 is a microprocessor based control designed to operate mechanical equipment to deliver heat to a single zone within a hydronic heating system. It can be used with any terminal unit type, including radiant floor, baseboard, and fan coils. This product maintains very accurate and even air temperature with Pulse Width Modulation and Auto Heating Cycling. It is capable of controlling a zone valve or zone pump directly or through a tekmarNet (R) 4 Wiring Center or Zone Manager to maintain air temperature and an auxiliary temperature. This temperature is typically floor, but could be remote air.
Features
- Auto heating cycle
- Pulse width modulation
- Freeze protection
- Auxiliary sensor input
| Specifications | |
|---|---|
| Agency Approvals | CSA C US, meets class B: ICES & FCC Part 15 |
| Ambient Conditions | Indoor use only, -22 to 131 degrees F (-30 to 55 degrees C), RH less than or equal to 90 percent non-condensing |
| Control Type | Microprocessor control, this is not a safety (limit) control |
| Dimensions | 2-7/8" H x 2-7/8" W x 13/16" D (73 x 73 x 21 mm) |
| Enclosure Material | White PVC plastic |
| Enclosure NEMA Rating | NEMA 1 |
| Power Supply | 24 V (ac) plus / minus 10 percent, 50/60 Hz, 1.5 VA |
| Relay | 24 V (ac) 2 A max, Class 2 |
| Sensor | NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta = 3892 |