| Voltage | 120 Vac |
| Supply Voltage | 40 VA; 26.5 V - Secondary |
| Frequency | 50 Hz; 60 Hz |
| Electrical Ratings | 12 W maximum |
| Application | For 24 Vac fan control applications |
| Includes | R8222B |
| Dimensions | 4 1/2 in. high, 4 3/16 in. wide, 3 3/32 in. deep |
| UL | UL Listed |
| CSA | Certified |
| Switching Action | SPDT |
| Horsepower | 3/4 HP |
| Coil Ratings | Inrush-- 20 VA maximum, 17 VA nominal.; Sealed-- 10 VA maximum, 9 VA nominal |
| Approvals, NEMA Standard | NEMA Standard DC20-1992 |
Description
The R8239A1052 is a fan center from Resideo (Honeywell Home): a control transformer and a relay in one enclosure, rated 40 VA, with SPDT contacts.
A fan center is what lets a low-voltage thermostat run a line-voltage blower. The transformer makes the 24 V control power, the relay carries the blower current, and both live in a box that mounts on the furnace or air handler instead of being assembled from loose parts.
SPDT contacts give a normally open and a normally closed set from the same relay, so the same fan center can run a blower on a call and drop a damper or an interlock at the same time.
Note on category: this part is listed under aquastats, but it is a fan center, not a boiler water temperature control. It does not sense temperature.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: R8239A1052/U
- Type: Fan center (transformer + relay)
- Transformer rating: 40 VA
- Switch action: SPDT
- UPC: 085267000420
- Category: Fan Centers