Service Manual 2 0 11 Hazardous Duty Room Air Conditioner R-410A Models Cool Only SH15M30 SH20M30 * * HG-ServMan (1-11) * Last character may vary.
Table Of Contents Important Safety Information ..................................................................................................................... 2-4 Introduction ................................................................................................................................................... 4 Unit Identification ..........................................................................................................................................
IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.
• Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, and sleeve on the room side of the air conditioning unit while cleaning. • Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry. • Never operate the A/C unit with wet hands.
PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS: • Read the Installation/Operation Manual for this air conditioning unit prior to operating. • Use air conditioner on a single dedicated circuit within the specified amperage rating. • Connect to a properly grounded circuit only. • Do not use extension cords with the unit. • Failure to follow these instructions can result in fire and minor to serious property damage.
UNIT IDENTIFICATION Model Number Code S H 15 M 3 0 A - A 9th Digit – Engineering Suffix Indicates Modification (Subject to change) 1st Digit – Function S = Straight Cool, Value Series 8th Digit – Marketing Suffix Indicates Modification (Subject to change) 7th Digit – Options 0 = Straight Cool & H = HazardGard 6th Digit – Voltage 3 = 230-208 Volts 3rd and 4th Digit - Approximate BTU/HR (Cooling) Heating BTU/Hr capacity listed in the Specifi cation/Performance Data Section 5th Digit - Model Series/Year I
HAZARDGARD APPLICATION UL Listed for use in Class I, Division 2, Groups A, B, C and D hazardous locations. Hazardgard is specifically designed to cool living quarters, storage areas and other enclosures situated in hazardous locations, where specific volatile flammable liquids or gases are handled or used within enclosed containers or systems. For more than 30 years, the Friedrich Hazardgard has endured some of the toughest and most unforgiving operating conditions imaginable.
SPECIFICATIONS AND PERFORMANCE DATA Cooling Performance Data EVAPORATOR AIR TEMP. DEG. F Discharge Temp. Drop F. Air SH15M30 * 54 * CONDENSER TEMPERATURE DEG. F Discharge Temp Suction Temp Super Heat SubCooling 127 186 67 18 35 26 OPERATING PRESSURES ELECTRICAL RATINGS Suction Discharge Amps Cool Amps Heat 137 480 6.9 - BREAKER FUSE R-410A REF. Locked Rotor Charge in OZ. Amps 43 50 * 54 26 185 124 68 15 38 137 485 9.1 43 42.
ELECTRICAL DATA WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury or death. NOTICE FIRE HAZARD Not following the above WARNING could result in fire or electrically unsafe conditions which could cause moderate or serious property damage.
HAZARDGARD SPECIAL FEATURES • Permanent Split-Capacitor, totally enclosed fan motor to assure efficient operation even under adverse electrical conditions. Motor has a special stainless steel shaft to resist corrosion and a hermetically sealed overload for arc-free operation. • High capacity compressor with internal hermetically sealed overload. • Solid-state relay contains transient voltage suppressor to protect controls against transient voltage spikes.
COMPONENT DEFINITIONS A. Mechanical components Plenum assembly Diffuser with directional louvers used to direct the conditioned airflow. Blower wheel Attaches to the indoor side of the fan motor shaft and is used for distributing unconditioned, room side air through the heat exchanger and delivering conditioned air into the room.
COMPONENT TESTING FAN MOTOR CAPACITORS A 230 volt single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan. A running capacitor is wired across the start and run terminals of the motor. The motor is totally enclosed and is protected with a line voltage overload located internally of the motor. The motor shaft is stainless steel to resist corrosion. When the unit is turned on, the motor runs continuously.
THERMOSTAT LOW AMBIENT BYPASS VALVE A cross ambient thermostat is used to maintain the desired comfort level. The thermostat reacts only to a change in temperature at the bulb location. Important to the successful operation of the unit is the position of the sensing bulb in relation to the evaporator. WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure.
R-410A SEALED SYSTEM REPAIR CONSIDERATIONS WARNING Refrigeration system under high pressure Do not puncture, heat, expose to flame or incinerate. Only certified refrigeration technicians should service this equipment. R410A systems operate at higher pressures than R22 equipment. Appropriate safe service and handling practicces must be used. Only use gauge sets designed for use with R410A. Do not use standard R22 gauge sets.
R-410A SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER. EQUIPMENT REQUIRED: 1. Voltmeter 9. 2. Ammeter 10. Low Pressure Gauge - (-30 to 200 lbs.) 3. Ohmmeter 11. Vacuum Gauge - (0 - 1000 microns) 4. E.P.A. Approved Refrigerant Recovery System 12. Facilities for flowing nitrogen through refrigeration tubing during all brazing processes. 5. Vacuum Pump (capable of 200 microns or less vacuum.) 6.
Method Of Charging / Repairs The acceptable method for charging the Hazardgard system is the Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate. The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps: 1.
WARNING WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure. Extreme care must be used, if it becomes necessary to work on equipment with power applied. Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants. Failure to do so could result in serious injury or death.
Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions. A partial restriction allows some of the refrigerant to circulate through the system. With a complete restriction there is no circulation of refrigerant in the system. at the metering device entrance to the evaporator.
COMPRESSOR CHECKS WARNING WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied. Failure to do so could result in serious injury or death. Locked Rotor Voltage (L.R.V.) Test Locked rotor voltage (L.R.V.
Single Phase Resistance Test Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1). COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement Touch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter from terminals common to run (“C” to “R”). WARNING RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service.
3. After all refrigerant has been recovered, disconnect suction and discharge lines from the compressor and remove compressor. Be certain to have both suction and discharge process tubes open to atmosphere. 4. Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container. 5. Using an acid test kit (one shot or conventional kit), test the oil for acid content according to the instructions with the kit. 6.
ROUTINE MAINTENANCE WARNING ELECTRIC SHOCK HAZARD Turn off electric power before inspections, maintenances, or service. Extreme care must be used, if it becomes necessary to work on equipment with power applied. Failure to do so could result in serious injury or death. WARNING EXCESSIVE WEIGHT HAZARD Use two people to lift or carry the unit, and wear proper protective clothing. Failure to do so may result in personal injury. WARNING CUT/SEVER HAZARD Be careful with the sharp edges and corners.
ROUTINE MAINTENANCE (Continued) Discharge Air Plenum NOTICE Slot Tab Do not drill holes in the bottom of the drain pan or the underside of the unit. Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property. Return Air Grille Slot Tab Latches SLEEVE / DRAIN Latch Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and Return air grille debris.
ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET DATE: _______________ MODEL:_______________ SERIAL:________________ IS THERE A FRIEDRICH SLEEVE INSTALLED? IS THERE A CHASSIS SEAL GASKET INSTALLED? IS MAINTENANCE BEING PERFORMED? If NO is checked use back of sheet for explanation YES ____ ____ ____ NO ____ ____ ____ ELECTRICAL: LINE VOLTAGE (STATIC) START UP VOLTAGE AMPERAGE DRAW AMPERAGE DRAW --------------------------------- VOLTS VOLTS AMPS (COOL) AMPS (HEAT) COMPRESSOR LOCKED ROTOR AMPS RUNNI
TROUBLESHOOTING Problem Unit does not run Problem Possible Cause Power disconnected. Check power source. Branch circuit fuse blown or circuit breaker tripped. Replace fuse, reset breaker. If repeats, check fuse or breaker size. Check for shorts in unit wiring and components. Loose or disconnected wiring at switch. Check wiring & connections. Connect per wiring diagram. Inoperative switch (On-Off). Test for continuity, 3 and 2, 5 and 6. If bad, replace. Possible Cause Dirty filter.
TROUBLESHOOTING Problem Compressor attempts to start, or runs for short periods only. Cycles on overload. Problem Possible Cause Compressor attempts to start before system pressures are equalized. Allow a minimum of 3 minutes to allow pressures to equalize before attempting to start. Low or fluctuating voltage. Check voltage with unit operating. Check for other appliances on the circuit.
TROUBLESHOOTING Problem Fan motor does not run. Problem Switch (On-Off) does not cut fan motor off. Problem Noisy and/or vibration. Problem Possible Cause Defective switch (On-Off) Check continuity across terminals 2 and 3. Fan capacitor open. Test with capacitor analyzer. Replace if bad. Inoperative fan motor. Check power and if okay, perform continuity test. Replace if bad. Incorrect wiring of fan circuit. Connect per wiring diagram. Solid state relay open. Replace relay.
ELECTROMECHANICAL CONTROL COOL ONLY MODELS: SH15M30 SH20M30 * * *Last character may vary.
Friedrich Air Conditioning Company 10001 Reunion Place, Suite 500 San Antonio, TX 78216 1-800-541-6645 www.friedrich.com HAZARDGARD® ROOM AIR CONDITIONERS LIMITED WARRANTY LIMITED ONE YEAR PARTS WARRANTY 1. Limited warranty – One year. Friedrich warrants that it will provide a replacement for any part of this Hazardgard Room Air Conditioner found defective in material or workmanship for a period of one (1) year from the date of original purchase. 2. Limited warranty – One year.
TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING CO. 10001 Reunion Place, Ste. 500, San Antonio, TX 78216 (210) 546-0500 877-599-5665 x 261 FAX (210) 546-0731 Email: tac@friedrich.com www.friedrich.com Printed in the U.S.A.
FRIEDRICH AIR CONDITIONING CO. 10001 Reunion Place, Ste. 500, San Antonio, TX 78216 P 210-546-0500 | F 210-546-0731 www.friedrich.com Printed in the U.S.A.
