• 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.Universal Hydronic Switching Relay, 120 Vac, 60 Hz| 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. |
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| Thermostat Heat Anticipator Setting | 0.12A |
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| 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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| Switching Action | Two SPST, plus PowerPile® rated low voltage SPST relay. (If normally closed contacts are needed, use RA889A). |
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| 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. |
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| Temperature Range (F) | (Ambient) -20 F to +120 F |
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| Temperature Range (C) | (Ambient) -29 C to +49 C |
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| Thermostat Compatibility | Honeywell electromechanical and electronic 2- or 3-wire |
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| Coil Ratings Voltage | 24 Vac |
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| Approvals, Canadian Underwriters Laboratories | Listed: Guide No. XAPX7. |
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| Electrical Connections | Control Circuit- 2 or 3-wire |
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| Electrical Connections (Control Circuit) | 2 or 3-wire |
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| Electrical Ratings (Primary Voltage) | 120V, 60 Hz |
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| Contacts Electrical Ratings (120 Vac AFL) | 7.4A AFL, 44.4A ALR on each set of line-voltage contacts. Maximum connected load is 2000 VA. |
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| Includes | Integral transformer, enclosure |
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| Approvals, Underwriters Laboratories Inc | Listed: File No. E4436, Guide No. XAPX |
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| Comments | Thermostat Compatibility-- Honeywell electromechanical and electronic 2- or 3-wire; Thermostat Heat Anticipator Setting-- 0.12A |
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| Temperature Ratings (F) | Ambient: -20 F to +120 F |
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| Temperature Ratings (C) | Ambient: -29 C to +49 C |
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| Dimensions (in.) | 6 1/4 in. high x 4 7/16 in. wide x 3 1/2 in. deep |
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| Operating Humidity Range (% RH) | 0 to 90% RH, non-condensing |
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| Dimensions (mm) | 159 mm high x 118 mm wide x 89 mm deep |
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