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 Honeywell models:R182A,B,C,J; R482A,B,C,J; R845; R882A,B,C,J and RA832.

ApplicationEnclosed 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. deepDimensions (mm)159 mm high x 118 mm wide x 89 mm deepIncludesIntegral transformer, enclosureCommentsThermostat Compatibility-- Honeywell electromechanical and electronic 2- or 3-wire; Thermostat Heat Anticipator Setting-- 0.12AItem TypeProductFrequency60 HzApprovals, Underwriters Laboratories Inc.Listed: File No. E4436, Guide No. XAPXElectrical ConnectionsControl Circuit- 2 or 3-wireOperating Humidity Range (% RH)0 to 90% RH, non-condensingTemperature Ratings (C)Ambient: -29 C to +49 CTemperature Ratings (F)Ambient: -20 F to +120 FApprovals, Canadian Underwriters Laboratories Inc.Listed: Guide No. XAPX7.SwitchingTwo 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 contactsInput Voltage120VCoil Ratings Voltage24 VacCoil Ratings Current0.4AElectrical Ratings, ContactsMaximum connected load is 2000 VATransformerSecondary Rating-24 Vac, 12 VA max., 9 VA available for external load. Secondary protected by replaceable 1A automotive fuse.