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RA889A Switching Relay
APPLICATION
The RA889A Switching Relay 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
• High load switching capability.
• Troubleshooting LED.
• Push-to-test button.
• Replaceable transformer fuse.
• 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 24V
transformer supply.
• One model replaces many Resideo models. (See Table
1 Replacement Cross Reference.)
Application .....................................................................................
Features ..........................................................................................
Specifications ...............................................................................
Installation ....................................................................................
Mounting ........................................................................................
Wiring ..............................................................................................
Operation .......................................................................................
Checkout ........................................................................................
Troubleshooting ..........................................................................
PRODUCT DATA
Contents
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68-0216-03
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Summary of Contents for Honeywell Home RA889A
- Page 1 • One model replaces many Resideo models. (See Table 1 Replacement Cross Reference.) APPLICATION The RA889A Switching Relay provides intermediate switching of line- and low-voltage devices from a line- or low-voltage controller and is typically applied in hydronic heating systems.
- Page 2 2-1/8 some minor differences in performance can be (54) 7/8(22) expected if those conditions are changed. DIAMETER Model: RA889A Switching Relay with 24V controller for switching one-line voltage load. KEYHOLE Electrical Ratings: TYPE 3/16 (5) DIAMETER MOUNTING Voltage: 120 Vac, 60 Hz.
- Page 3 — — — R882J RA889A has SPDT relay with one normally-open and one normally-closed, line-voltage rated contacts. Use R8845U if two sets of normally-open, line-voltage rated contacts are required. RA89A has lower output load rating. Check load requirements. INSTALLATION NOTE: To reduce the possible transformer hum and relay...
- Page 4 Never connect load terminals to a The RA889A consists of a transformer, an Spdt line-voltage load that uses more current than the amount listed in the relay, an Spst low-voltage relay and wiring terminals.
- Page 5 CONTROL CASE MUST BE CONNECTED TO EARTH GROUND. USE GROUNDING SCREW PROVIDED. B1 IS 1/4 IN. TAB TERMINAL. C WIRE IS OPTIONAL OR UNUSED ON SOME THERMOSTATS. M14301A Fig. 3. RA889A hookup for L7148A/L8148A in an oil-fired, tankless hot water, zoned, pump system. THERMOSTAT THERMOSTAT THERMOSTAT...
- Page 6 SEVERE INJURY OR DEATH. DISCONNECT POWER BEFORE WIRING OR SERVICING L1. POWERED RELAYS MUST BE WIRED AS DRY CONTACTS. N.C. IS LABELED “A” ON SOME RA889A MODELS. TO SIMPLIFY THE DIAGRAM, THE ABOVE DRAWING DOES NOT MATCH THE TERMINAL LOCATION ON RA889A.
- Page 7 RA889A SWITCHING RELAY 68-0216—03...
- Page 8 68-0216—03 M.S. Rev. 04-19 | Printed in United States This product is manufactured by Resideo Technologies, Inc., Golden Valley, MN, 1-800-468-1502 ©2019 Resideo Technologies, Inc. The Honeywell Home trademark is used under license from Honeywell International Inc. All rights reserved.
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