Overview
The R8845U Universal Switching Relay with 24 V transformer provides intermediate switching of line-and low-voltage devices from a line- or low-voltage controller and is typically applied in Hydronic heating systems.
Features
- Replaceable socketed relays.
- Two troubleshooting LED.
- Push-to-test button.
- Replaceable transformer fuse.
- Low-voltage contact rating for PowerPile® applications.
- Long-life DC relay drive control technology.
- Relay for use with external 24 Vac or 24 Vdc supply, with line-voltage control, or with internal 24 V transformer supply.
- One model replaces many competitor models.
- One model may replace many models:R182A,B,C,J; R482A,B,C,J; R845; R882A,B,C,J and RA832.
Product Specifications
- Application
- Enclosed Universal switching relay with internal transformer for 24 volt 2 or 3 wire thermostat control of line voltage devices. Two line voltage SPST relays and one low voltage SPST relay with PowerPile® rating.
- Dimensions (in.)
- 6 1/4 in. high x 4 7/16 in. wide x 3 1/2 in. deep
- Dimensions (mm)
- 159 mm high x 118 mm wide x 89 mm deep
- Includes
- Integral transformer, enclosure
- Comments
- Thermostat Compatibility-- Honeywell electromechanical and electronic 2- or 3-wire; Thermostat Heat Anticipator Setting-- 0.12A
- Item Type
- Product
- Frequency
- 60 Hz
- Approvals, Underwriters Laboratories Inc.
- Listed: File No. E4436, Guide No. XAPX
- Electrical Connections
- Control Circuit- 2 or 3-wire
- Operating Humidity Range (% RH)
- 0 to 90% RH, non-condensing
- Temperature Ratings (C)
- Ambient: -29 C to +49 C
- Temperature Ratings (F)
- Ambient: -20 F to +120 F
- Approvals, Canadian Underwriters Laboratories Inc.
- Listed: Guide No. XAPX7.
- Switching
- Two SPST, plus PowerPile® rated low voltage SPST relay. (If normally closed contacts are needed, use RA889A).
- Contact Ratings (AFL)
- 7.4A AFL, 44.4A @ 120 Vac on each set of line-voltage contacts
- Input Voltage
- 120V
- Coil Ratings Voltage
- 24 Vac
- Coil Ratings Current
- 0.4A
- Electrical Ratings, Contacts
- Maximum connected load is 2000 VA
- Transformer
- Secondary Rating-24 Vac, 12 VA max., 9 VA available for external load. Secondary protected by replaceable 1A automotive fuse.
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