Switching Relay FEATURES PRODUT DATA High load switching capability. Troubleshooting LED. Push-to-test button. Replaceable transformer fuse. Long-life D relay drive control technology. Relay for use with external 4 Vac or 4 Vdc supply, with line-voltage control, or with internal 4V transformer supply. One model replaces many Honeywell models. (See Table Replacement ross Reference.) APPLIATION The 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. ontents Application... Features... Specifications... Ordering Information... Installation... Mounting... Wiring... 4 Operation... 4 heckout... 4 Troubleshooting... 4 U.S. Registered Trademark opyright 000 Honeywell Inc. All Rights Reserved 68-06-
SWITHING RELAY SPEIFIATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed. TRADELINE Model: Switching Relay with 4V controller for switching one-line voltage load. Dimensions: See Fig.. 7/8() DIAMETER -/8 (5) 4-7/6 (8) -/8 (54) Electrical Ratings: Voltage: 0 Vac, 60 Hz. Thermostat Heat Anticipator Setting: 0.A. Transformer Ratings: Primary: 0 Vac, 60 Hz. Secondary: 4 Vac, VA maximum, 9 VA available for external loads. Secondary protected by replaceable A automotive fuse. /6 (5) DIAMETER /8 (0) DIAMETER KEYHOLE TYPE MOUNTING HOLE 5-/8 (7) ontact Ratings: 5 AFL, 0 ALR; maximum connected load 000 VA. Temperature Ratings: Ambient: -0 F to 0 F (-9 to 49 ). Humidity Ratings: 0 to 90% rh, non-condensing. Switching Action: Spdt, plus Powerpile rated low voltage Spst relay. Electrical onnections: No. 8 captivated wire clamp screw terminals. Finish: Zinc plated steel. 7/ (6) DIAMETER MOUNTING HOLE KNOKOUT FOR / () ONDUIT () -/6 (94) 5/6 (8) 5/6 (8) 6-/4 (59) -/ (89) Knockouts: ase Bottom: Three / in. ( mm) for conduit box. ase Top: One 7/8 in. ( mm) for wiring. -/6 (56) Approvals: Underwriters Laboratories Inc. Listed: File no. E446, Guide no. XAPX. anadian Underwriters Laboratories Inc. Listed: Guide no. XAPX7. ORDERING INFORMATION -/6 (7) -/4 () Fig.. dimensions in in. (mm). M75 When purchasing replacement and modernization products from your TRADELINE wholesaler or distributor, refer to the TRADELINE atalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:. Your local Home and Building ontrol Sales Office (check white pages of your phone directory).. Home and Building ontrol ustomer Logistics Honeywell Inc., 885 Douglas Drive North Minneapolis, Minnesota 554-486 (6) 95-000 In anada Honeywell Limited/Honeywell Limitée, 55 Gordon Baker Road, North York, Ontario MH N7. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, anada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A. 68-06
SWITHING RELAY ross Reference: The replaces many Honeywell models. See Table for additional cross reference information. Replacement Parts: 0090-00 Replacement Relay. Relay Fuse: A automotive fuse. Thermostat ompatibility: All Honeywell electromechanical and most electromechanical - or -wire. Select thermostats with 0.A heating anticipator setting to match the electrical rating of the switching relay. Table. Replacement ross Reference. onnections Low Manufacturer Model Input Line Voltage Power Relay Voltage Relay Thermostat omments Honeywell OM N.. Honeywell RA89A a 4 T T R8A a 7 8 B R See Fig. 6 thermostat connections a has one set of OM/ relay contacts. Use R8845U if two sets are required. b RA89A has lower output load rating. heck load requirements. Jumper to OM and between and in. R8B 8 6 7 B R Requires jumper between and R8 b 8 6 7 B R. R48B 8 6 7 Jumper to R48 b 8 6 7. Line voltage switched inputs go to and. See Fig. 7B. R48J b 6 8 7 Line voltage inputs go to and. See Fig. 7B. R88A a 8 7 W B R88B 8 6 7 W B R88 b 8 6 7 W B R88J b 6 8 7 INSTALLATION When Installing this Product.... Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. heck the ratings given in the instructions and on the product to make sure the product is suitable for your application.. Installer must be a trained, experienced service technician. 4. After installation is complete, check out product operation as provided in these instructions. 5. Follow local codes for installation and application. WARNING Electrical Shock Hazard. Power supply can cause severe injury or death. Transformer core not bonded. Disconnect power supply before wiring. MOUNTING In replacement applications, mount the new relay in the same location as the old relay. For new installations, locate the relay vertically on a solid wall or partition as close as possible to the device to be controlled. Select a location that is easily accessible for installation and service. NOTE: To reduce the possible transformer hum and relay noise that is sometimes amplified by mounting surfaces such as sheet metal, plasterboard, and similar materials, place rubber or felt washers between the case and the mounting surface.. Position the relay and mark the mounting holes. See Fig... Start a screw in the upper right corner for the keyhole type mounting hole. Screw it down within about /8 in. ( mm) of the surface.. Hang the relay on the screw, position the case, and start the bottom screw. 4. Tighten both screws. 68-06
SWITHING RELAY WIRING WARNING Electrical Shock Hazard. an cause serious personal injury or death. Use only NE lass wire for all line voltage wiring connections. lass wires must be rated for at least 67 F (75 ). All wiring must comply with all applicable electrical codes, ordinances, and regulations. Follow all instructions furnished with the controlled equipment. IMPORTANT The switching relay terminals are approved only for use with copper wires. When two or more line-voltage load devices are to be controlled in parallel, the total current must not exceed the rating for the relay load. Never connect load terminals to a load that uses more current than the amount listed in the electrical ratings on the relay. See Table for wiring length specifications. See the schematic and typical hookups in Fig. through 7. Table. Wire Lengths. Wire Size Total Wire Length Wire Length of Run to Thermostat (AWG) Feet Meters Feet Meters 0 8.0 60 8.0 0 00 6.0 00 0.5 8 00 9.5 50 45.5 6 500 5.5 50 76.0 4 800 44.0 400.0 OPERATION The consists of a transformer, an Spdt line-voltage relay, an Spst low-voltage relay and wiring terminals. When line-voltage is applied to the transformer, the relay is powered on thermostat contact closure. The relay may also be used to provide electrical isolation in low-voltage circuits, if powered from a 4 Vac or 4 Vdc external source connected to and. Fiber barriers separate line- and low-voltage connections. HEKOUT. Keep the cover on the relay during normal operation and remove only for service and checkout.. Relay contacts require no cleaning; they are arranged to close with a wiping action and are self-cleaning. The contacts may turn black after being in service for some time; this discoloration does not prevent proper operation.. After installation is complete, operate system through at least one cycle from the controller to make certain the relay controls the equipment as intended..troubleshooting Test Button This connection is the same as a call for heat connection between the and terminals. Relay LED This LED lights whenever there is 0 Vac () on the terminal (when OM/ relay contacts are closed). LOW VOLTAGE (LASS ) -WIRE AUTOMOTIVE FUSE RELAY LED G OM N.. HOT TO POWER LOAD TO POWER LOW-VOLTAGE POWERPILE POWER SUPPLY. PROVIDE OVERLOAD PROTETION AND DISONNET MEANS AS REQUIRED. M495 Fig.. internal schematic and typical hookup. 68-06 4
SWITHING RELAY T87F T87F T87F RELAY OM OM OM (HOT) PUMP PUMP PUMP G T T B B L748A/L848A 554 F F T ORANGE WHITE BLAK BURNER AND IGNITION R884G T POWER SUPPLY. PROVIDE DISONNET MEANS AND OVERLOAD PROTETION AS REQUIRED. ONTROL ASE MUST BE ONNETED TO EARTH GROUND. USE GROUNDING SREW PROVIDED. B IS /4 IN. TAB TERMINAL. M40 Fig.. hookup for L748A/L848A in an oil-fired, tankless hot water, zoned, pump system. T87F T87F T87F RELAY OM OM OM (HOT) PUMP PUMP PUMP G T T B B TR THTR TH LOW VOLTAGE GAS VALVE (eg, VR800) POWER SUPPLY. PROVIDE DISONNET MEANS AND OVERLOAD PROTETION AS REQUIRED. L748F/L848E ONTROL ASE MUST BE ONNETED TO EARTH GROUND. USE GROUNDING SREW PROVIDED. B IS /4 IN. TAB TERMINAL. M4 Fig. 4. hookup for L748F/L848E in a gas-fired, 4V, zoned, pump system. 5 68-06
SWITHING RELAY ZONE ZONE ZONE ZONE 4 R8888 R W R W R W R W R A B 0 VA ZONE ZONE ZONE ZONE 4 H H Z G 4 (HOT) IRULATOR PUMP IRULATOR PUMP IRULATOR PUMP IRULATOR PUMP 4 OM G IRULATOR PUMP 5 ZONE 5 Z H H TO APPROPRIATE ONNETIONS AS REQUIRED BY THE SYSTEM. H-H TYPIALLY ONNETED TO T-T OF BURNER ONTROL SYSTEM. ONTROL ASE MUST BE ONNETED TO EARTH GROUND. USE GROUNDING SREW PROVIDED. POWER SUPPLY. PROVIDE DISONNET MEANS AND OVERLOAD PROTETION AS REQUIRED. USE OPPER ONDUTORS ONLY. FOR ALL LASS ONNETIONS, USE WIRE RATED FOR AT LEAST 67 F (75 ). 4 ONNET -Z JUMPER, IF REQUIRED. M Fig. 5. R8888 zone expansion using Switching Relays. THREE-WIRE LOW VOLTAGE (SERIES 0) TWO-WIRE LOW VOLTAGE (SERIES 80) B MAKES ONTAT ONLY ON TEMPERATURE FALL. M6 Fig. 6. thermostat connections. 68-06 6
SWITHING RELAY A. FOR 4V ONTROL, (HOT) NEUTRAL R W OPTIONAL LINE VOLTAGE ONTROLLED OUTPUTS OM N.. LOW VOLTAGE ONTROLLED OUTPUT B. FOR LINE VOLTAGE ONTROL LINE VOLTAGE ONTROL NEUTRAL JUMPER OM N... FOR EXTERNAL SEPARATE LOW VOLTAGE POWER SOURE NEUTRAL 4V ONTROLLER INPUT SUPPLY OM N.. REQUIRED FOR OUTPUT LED OPERATION. FOR SERIES 0 OR OTHER HARDWIRED ELETRONI -WIRE S. WARNING! ELETROUTION HAZARD. POWER SUPPLY AN AUSE SEVERE INJURY OR DEATH. DISONNET POWER BEFORE WIRING OR SERVIING. POWERED RELAYS MUST BE WIRED AS DRY ONTATS. M7A Fig. 7. control options. 7 68-06
Home and Building ontrol Home and Building ontrol Honeywell Asia Pacific Inc. Honeywell Inc. Honeywell Limited-Honeywell Limitée Room -5 Honeywell Plaza 55 Gordon Baker Road Sun Hung Kai entre P.O. Box 54 North York, Ontario No. 0 Harbour Road Minneapolis, MN 55408-054 MH N7 Wanchai Hong Kong Honeywell Latin American Region Honeywell Europe S.A. 480 Sawgrass orporate Parkway Avenue du Bourget Suite 00 40 Brussels Sunrise FL 5 Belgium 68-06 G.R. Rev. 5-00 Printed in U.S.A. on recycled paper containing at least 0% www.honeywell.com post-consumer paper fibers.