Heat Controller RADS-51B Service And Parts Manual
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Heat Controller RADS-51B Service And Parts Manual

Heat Controller RADS-51B Service And Parts Manual

Room air conditioner
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RADS-51B
CAUTION
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE
PERSONNEL.

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Summary of Contents for Heat Controller RADS-51B

  • Page 1 RADS-51B CAUTION PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.

  • Page 2: Table Of Contents

    CONTENTS 1. PREFACE ..............................3 1.1 FEATURES..............................3 1.2 SPECIFICATIONS ............................3 1.3 LOCATIONS OF CONTROLS ........................4 1.4 SAFETY PRECAUTIONS ..........................4 1.5 INSULATION RESISTANCE TEST ........................4 2. DISASSEMBLY INSTRUCTIONS ....................5 2.1 MECHANICAL PARTS ..........................5 2.1.1 FRONT GRILLE ............................5 2.1.2 CABINET..............................5 2.1.3 CONTROL BOARD ..........................5 2.2 AIR HANDLING PARTS ..........................6 2.2.1 AIR GUIDE UPPER ..........................6 2.2.2 ORIFICE, TURBO FAN AND FAN ......................6...

  • Page 3: Preface

    • POWERFUL AND INCREDIBLE COOLING • TOP-DOWN CHASSIS FOR THE SIMPLE INSTALLATION AND SERVICE • BUILT-IN ADJUSTABLE THERMOSTAT • WASHABLE ONE-TOUCH FILTER • COMPACT SIZE 1.2 SPECIFICATIONS MODELS RADS-51B ITEMS COOLING CAPACITY (BTU/h) 5,100 POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60HZ INPUT (W) OPERATING CURRENT (AMP.)

  • Page 4: Locations Of Controls

    1.3 LOCATIONS OF CONTROLS Controls Temperature Setting • This button can automatically control the temperature of the room. The temperature can be set within a range of 60 °F to 86 ° F by 1°F. Select the lower number for lower temperature of the room. Energy Saver The fan stops when the compressor stops cooling.

  • Page 5: Disassembly Instructions

    2. DISASSEMBLY INSTRUCTIONS 2.1 MECHANICAL PARTS 2.1.1 FRONT GRILLE Figure 1 1. Pull the inlet grille forward. 2. Remove the screw securing the Front Grille. (Fig. 3) 3. Push the grille up from the bottom and pull the top of the grille away from the case to lift the top tabs out of their slots.

  • Page 6: Air Handling Parts

    2.2 AIR HANDLING PARTS Figure 6 2.2.1 AIR GUIDE UPPER 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5.

  • Page 7: Motor

    2.2.3 MOTOR Figure 10 1. Disconnect the unit from the power source. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove the control board. (Refer to Section 2.1.3) 5. Remove the air guide upper. (Refer to Section 2.2.1) 6.

  • Page 8: Compressor

    2.3.2 COMPRESSOR Figure 14 1. Remove the front grille and cabinet. (Refer to Section 2.1) 2. Discharge the refrigerant by using a refrigerant recovery system. 3. Remove the overload protector. (Refer to Section 2.3.1) 4. After discharging the unit completely, unbrace the suction and discharge pipes at the compressor connections.

  • Page 9: Power Cord

    2.3.6 POWER CORD Figure 18 1. Disconnect the unit from source of power. 2. Remove the front grille. (Refer to Section 2.1.1) 3. Remove the cabinet. (Refer to Section 2.1.2) 4. Remove a screw that secures control board to base pan. (Refer to Section 2.1.3) 5.

  • Page 10: Evaporator

    2.4.2 EVAPORATOR wise. This will keep oil from foaming and being drawn into the vacuum pump. 1. Remove the cabinet. 2. Discharge the refrigerant by using a refrigerant 6-3. Operate the vacuum pump for 20 to 30 min- recovery system. utes, until 600 micron vacuum is obtained.
  • Page 11 Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components and service valve. COMPOUND GAUGE MANIFOLD GAUGE CONDENSER SEE INSETS (HIGH PRESSURE SIDE) BELOW COMPRESSOR EVAPORATOR...

  • Page 12: Installation

    3. INSTALLATION This air conditioner is designed with a button-down chassis so it can be easily installed in a window. 3.1 SELECT THE BEST LOCATION 1. To prevent vibration and noise, make sure the unit is installed securely and firmly. 2.

  • Page 13: Before Installation

    Installation HARDWARE TYPE A: 11EA TYPE B: 4EA TYPE C: 3EA (SHORT SCREW) (WOOD SCREW) (L BACKET) TYPE D: 1EA TYPE E: 1EA TYPE F: 2EA (SEAL STRIP) (SASH SEAL) (GUIDE PANEL) (Adhesive backed) (Not adhesive backed) 3.2.2 BEFORE INSTALLATION 1.
  • Page 14 3. INSTALL THE AIR CONDITIONER IN THE WINDOW INNER SILL a. Carefully lift the air conditioner and slide it into the TYPE A OUTER SILL INSIDE open window. Make sure the bottom guide of the air CENTER LINE conditioner drops into the notches of the L bracket.

  • Page 15: Troubleshooting Guide

    REMOVAL FROM WINDOW Turn the air conditioner off, disconnect the power cord, remove the L bracket and the screws installed through the top and bot- tom of the guide panels, and save for reinstallation later. Close the guide panels. Keeping a firm grip on the air conditioner, raise the sash, and carefully tilt the air conditioner backward, draining any condensate water.

  • Page 16: Piping System

    4.2 PIPING SYSTEM CONDENSER COILS MOTOR CAPILLARY TUBE TURBO FAN EVAPORATOR COILS Figure 32 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONDITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS...

  • Page 17: Troubleshooting Guide

    4.3 TROUBLESHOOTING GUIDE In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused by an electrical defect. The other is Ineffective Air Con- ditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective.
  • Page 18 Fails to Start Check of circuit breaker Check of power source. and fuse. Check of control switch Gas leakage of feeler setting. bulb of thermostat. Check control switch. Compressor fails only to Fan only fails to start. start. Improper wiring. Improper thermostat Drop of power voltage.
  • Page 19 ROOM AIR CONDITIONER VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 115V ± 10% 103.5V 126.5V COMPLAINT CAUSE REMEDY Fan motor will not run. No power Check voltage at outlet. Correct if none. Power supply cord Check voltage to rotary switch. If none, check power supply cord.
  • Page 20 COMPLAINT CAUSE REMEDY Fan motor noise. If cracked, out of balance, or partially missing, replace it. Blower If cracked, out of balance, or partially missing, replace it. Loose set screw Tighten it. Worn bearings If knocking sounds continue when running or loose, replace the motor.
  • Page 21 COMPLAINT CAUSE REMEDY Compressor cycles on Fan motor If not running, determine the cause. Replace if overload. required. Condenser air flow Remove the cabinet, inspect the interior surface restriction of the condenser. If restricted, clean carefully with a vacuum cleaner (do not damage fins) or brush.

  • Page 22: Circuit Diagram

    5. CIRCUIT DIAGRAM POWER INPUT BK(BR) WH(BL) (Plain) (Ribbed) ROTARY SWITCH GN(GN/YL) MOTOR OR(BR) CAPACITOR OR(BR) COMP. THERMOSTAT SYNC. M. 3854AR2330A WIRING DIAGRAM ROCKER SWITCH LOCATION Q'TY DESCRIPTION PART NO. PER SET 2H00677P POWER CORD ASSY FAN MOTOR 4681A10016C COMPRESSOR 2520UCAA003 ROTARY SWITCH 2H00154H...

  • Page 23: Exploded View

    6. EXPLODED VIEW 130910 559011 W48602 749740 554030 149980 267110 349480 731273 135312 352380 147581 147582-1 359012 346811 W48602 152302 352390 147582-2 354210 130410 135313 W0CZZ 264110 352111 352115 567502 352113 237200 554160 268711-1 263230 35211A 550140 238310 268711-2 249950 —23—...

  • Page 24: Service Parts List

    Replacement Parts List RADS - 51B LocNo P/NO REMARK Description 130410 3041A20036G BASE ASSEMBLY,WELD 130910 3091AR6055M CABINET ASSEMBLY,SINGLE 135312 3531A20087D GRILLE ASSEMBLY,FRONT 135313 3530A10039H GRILLE,INLET 147581 4520AR3191A LINK 147582-1 5990AR3190C LOUVER,VERTICAL 147582-2 5990AR3190D LOUVER,VERTICAL 149980 4998AR1608A SHROUD 152302 5231AR2148A FILTER,AIR 237200 3720A20017A PANEL,CONTROL...
  • Page 25 3828A26005D...

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Comfort-aire rads-51b

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