TRADELINE R8285A,B Control Centers ® Application R8285A,B Control Centers provide low voltage control of line voltage fan motors and auxiliary circuits in heating, cooling, or air conditioning systems. For model specifications, refer to Table 1. TABLE 1—R8285 MODEL SPECIFICATIONS. Control Center Replacement Relay R8285A R8285B Contact Rating Input Voltage (Vac) See Wiring Diagram spdt 120 or 208/240 Fig. 1 dpdt 120, 208/240, or 120/208/240 Fig. 2 AFL ALR Switching R8222B 12 60 R8222D 12 60 The R8285A has spdt switching for two-speed fan motor applications. The R8285B has dpdt switching for Total Comfort applications with electronic air cleaner, humidifier, and blower motor. CONTACT RATINGS: Refer to Table 2. TABLE 2—R8285A,B CONTACT RATINGS.a Voltage Full Load (amp) 120 Vac 12 Locked Rotor (amp) 60 aMeets UL 3/4 horsepower requirements. 208/240 Vac 6 35 RELAY COIL RATINGS: Inrush: 20 VA maximum. Sealed: 9 VA nominal. Wattage: 5 watts. Pickup Voltage: Must pick up below 18 volts. TRANSFORMER RATINGS: Power Rating: 40 or 50 VA. Primary Voltage: 120, 208/240, or 120/208/240 Vac. Secondary Voltage for 40 VA at 1.67 Amps: 24 Vac. Secondary Voltage for 50 VA at 2.08 Amps: 24 Vac. Open Circuit Secondary Voltage: 27.0. Overload Protection: Inherent. Voltage Frequency: 60 Hz. Installation WHEN INSTALLING THIS PRODUCT… 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in these instructions and on the product to ensure the product is suitable for your application. 3. Ensure installer is a trained, experienced service technician. 4. After completing installation, use these instructions to check product operation. CAUTION Disconnect power supply before beginning installation to prevent electrical shock and equipment damage. MOUNTING The R8285 mounts on a standard four inch square junction box. Make wiring connections in the junction box, then fasten the R8285 to the junction box by placing the junction box screws through the notches in the R8285 mounting plate. J. H. • 4-94 1 • ©Honeywell Inc. 1994 • Form Number 69-0482—2 NOTE: The R8285 must be mounted in an enclosure. The R8285 may be mounted in any position except with the mounting plate horizontal and the relay on top of the mounting plate. Fig. 2—R8285A typical hookup in two-speed fan motor application. R8225 ISOLATION RELAY HEATING CONTROL WIRING R8285A, B MODELS All wiring must comply with local codes and ordinances. Disconnect power before making wiring connections to prevent electrical shock or equipment damage. 1. Make primary connections to line voltage power supply. On multitap models, make sure you are using correct leads or terminals for available power supply. See Fig. 1. 2. On multitap models with leadwires, insulate ends of unused leads by taping or capping with a solderless connector. 3. Make secondary connections to 24 Vac control circuit. 4. Refer to Figs. 2 or 3 for typical wiring diagrams. THERMOSTAT 2 PLENUM SWITCH OR OTHER SWITCHING DEVICE W R PRIMARY HEATING CONTROL GY BROWN RED R8285A,H W COIL BLACK R L1 (HOT) G 1 WHITE Y L2 C LO HI BLACK C Fig. 1—Schematic for single and multitap transformers. TWO SPEED FAN MOTOR CONTACTOR OR COMPRESSOR CONTROL PANEL 120 VAC MODELS COMMON 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 BLACK PRIMARY 120 V 1 2 USE OPTIONAL HOOKUP WITH ISOLATING RELAY (DASHED LINE) IF HEATING CONTROL HAS A SEPARATE POWER SUPPLY. ISOLATION OF THE POWER SUPPLIES MAY ALSO BE ACCOMPLISHED BY USING SPECIAL THERMOSTAT SUBBASE COMBINATIONS WITH ISOLATED CIRCUITS (SUCH AS T87F-Q539A1147, T834A, T822A). M1157B REFER TO SPECIFICATION SHEETS FOR DETAILS. SECONDARY 3 120V - WHITE 208/240 VAC MODELS COMMON Fig. 3—R8285B typical hookup in two-speed fan motor Total Comfort application. 2 BLACK 208V PRIMARY 240V 3 RED 1 R882A ISOLATION RELAY SECONDARY HEATING CONTROL ORANGE T87F THERMOSTAT 120/208/240 VAC MODELS 2 WHITE 240V RED 1 SECONDARY B 3 PRIMARY HEATING CONTROL W BLACK W R COIL BLACK G BLACK IS COMMON WITH RESPECT TO THE TRANSFORMER WINDING ONLY AND NOT THE EXTERNAL CIRCUIT. RED/ YELLOW 2 SECONDARY CONNECTIONS ARE SCREW TERMINALS, 1/4 INCH QUICK-CONNECTS OR BLUE AND YELLOW LEADWIRES. BROWN 1 R GY R8285B ORANGE VIOLET 3 W BLACK 208V YELLOW 120V PRIMARY RED COMMON 2 F50 OR F51 AIR CLEANER WHITE Y C L1 (HOT) 1 L2 SOME MODELS AVAILABLE WITH 1/4 INCH QUICK-CONNECTS. LO M21020 HI R8243 CONTACTOR OR COMPRESSOR CONTROL PANEL COM FAN SWITCH H808A HUMIDISTAT IMPORTANT: Only use Underwriters Laboratories Inc. listed connectors when making external circuit connections to the line voltage leadwires of this device. HUMIDIFIER 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 USE OPTIONAL HOOKUP WITH ISOLATING RELAY (DASHED LINE) IF HEATING CONTROL HAS A SEPARATE POWER SUPPLY. ISOLATION OF THE POWER SUPPLIES MAY ALSO BE ACCOMPLISHED BY USING SPECIAL THERMOSTAT SUBBASE COMBINATIONS WITH ISOLATED CIRCUITS (SUCH AS T87F-Q539A1147, T834A, T822A). M1153C REFER TO SPECIFICATION SHEETS FOR DETAILS. 69-0482—2 2 Checkout Fig. 4—Replacing R8285 relay. Always conduct a thorough checkout when installation is complete. Operate the system through at least one complete cycle to assure that the system equipment and the R8285 operate as intended. RETAINING BAIL Service CAUTION Disconnect the power supply before servicing to prevent electrical shock and equipment damage. RECEPTACLE The R8285 relay is field replaceable. Replace the relay as follows: 1. Refer to Table 1 for the appropriate replacement relay. 2. Remove the plug-in relay from the receptacle and replace with the new relay. See Fig. 4. R8222 RELAY 3 M1298 69-0482—2 Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, MN 55422 69-0482—2 Printed in U.S.A. Home and Building Control Honeywell Limited—Honeywell Limitée 740 Ellesmere Road Scarborough, Ontario M1P 2V9 4 Helping You Control Your World QUALITY IS KEY