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2 0 11
Hazardous Duty
Room Air Conditioner
R-410A Models
Cool Only
SH15M30
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SH20M30
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HG-ServMan (1-11) Last character may vary.
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Service Manual
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Table Of Contents Important Safety Information ..................................................................................................................... 2-4 Introduction ................................................................................................................................................... 4 Unit Identifi cation .......................................................................................................................................... 5 Hazard
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IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualifi ed 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. Installation or repairs made by unqualifi ed persons can result in subjecting the unqualifi ed person making such repairs as well as the persons being served by the equipm
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• 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. • Use air conditioner on a single dedicated circuit within th
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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 specifi ed 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 fi re and minor to serious property damage. WATER DAMAGE HAZARDS: • Improper installation maintenance, or servicing of the air co
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UNIT IDENTIFICATION Model Number Code S H 15 M 3 0 A - A 9th Digit – Engineering Suffi x Indicates Modifi cation (Subject to change) 1st Digit – Function S = Straight Cool, Value Series 8th Digit – Marketing Suffi x Indicates Modifi cation (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 5th Digit - Model Series/Year Introd
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HAZARDGARD APPLICATION UL Listed for use in Class I, Division 2, Groups A, B, C and D hazardous locations. Hazardgard is specically designed to cool living quarters, storage areas and other enclosures situated in hazardous locations, where specic volatile €ammable 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. Time-tested i
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SPECIFICATIONS AND PERFORMANCE DATA Cooling Performance Data * EVAPORATOR AIR OPERATING BREAKER ELECTRICAL RATINGS R-410A REF. TEMP. DEG. F PRESSURES FUSE CONDENSER Discharge Suction Super Sub- TEMPERATURE Voltage Temp Temp Heat Cooling Discharge Locked Rotor 60 Hertz DEG. F Temp. Drop F. Suction Discharge Amps Cool Amps Heat Charge in OZ. Air Amps Amps 54 26 127 186 67 18 35 137 480 6.9 - 43 50 208 / 230 15 SH15M30 * 54 26 185 124 68 15 38 137 485 9.1 - 43 42.7 208 / 230 15 SH15M30 * Due to
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ELECTRICAL DATA WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be installed by a qualifi ed 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 fi re or electrically unsafe conditions which could cause moderate or serious property damage.
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HAZARDGARD SPECIAL FEATURES • Permanent Split-Capacitor, totally enclosed fan motor • Copper tubing/aluminum fi n coils. to assure effi cient operation even under adverse • Galvanized steel cabinet and base pan, all bonderized. electrical conditions. Motor has a special stainless steel shaft to resist corrosion and a hermetically sealed • Slide-out chassis for easy installation in window or overload for arc-free operation. through–the–wall. • High capacity compressor with internal hermeti
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COMPONENT DEFINITIONS A. Mechanical components Plenum assembly Diffuser with directional louvers used to direct the conditioned airfl ow. 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. Slinger fan blade Attaches to the outdoor side of the fan motor shaft and is used to move outside air through the condenser coil, while slinging condensate water out
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COMPONENT TESTING FAN MOTOR CAPACITORS A 230 volt single phase permanent split capacitor motor is used to drive the evaporator blower and condenser WARNING fan. A running capacitor is wired across the start and run terminals of the motor. ELECTRIC SHOCK HAZARD Turn off electric power before servicing. Discharge capacitor with a 20,000 Ohm 2 Watt The motor is totally enclosed and is protected with a resistor before handling. line voltage overload located internally of the motor. The mo
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THERMOSTAT LOW AMBIENT BYPASS VALVE A cross ambient thermostat is used to maintain the desired comfort level. The thermostat reacts only to a WARNING change in temperature at the bulb location. Important to the successful operation of the unit is the position of the HIGH PRESSURE HAZARD sensing bulb in relation to the evaporator. Sealed Refrigeration System contains refrigerant and oil under high pressure. Proper safety procedures must be followed, and proper protective clothing must be
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R-410A SEALED SYSTEM REPAIR CONSIDERATIONS WARNING Refrigeration system under high pressure Do not puncture, heat, expose to fl ame or incinerate. Only certifi ed 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. The following is a list of important considerations when working wit
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R-410A SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER. EQUIPMENT REQUIRED: 9. High Pressure Gauge - (0 to 750 lbs.) 1. Voltmeter 10. Low Pressure Gauge - (-30 to 200 lbs.) 2. Ammeter 11. Vacuum Gauge - (0 - 1000 microns) 3. Ohmmeter 12. Facilities for fl owing nitrogen through refrigeration tubing 4. E.P.A. Approved Refrigerant Recovery System during all brazing processes. 5. Vacuum Pump (capa
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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
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WARNING WARNING HIGH PRESSURE HAZARD ELECTRIC SHOCK HAZARD Turn off electric power before service or Sealed Refrigeration System contains refrigerant installation. and oil under high pressure. Extreme care must be used, if it becomes Proper safety procedures must be followed, necessary to work on equipment with power and proper protective clothing must be worn applied. when working with refrigerants. Failure to do so could result in serious injury or Failure to follow these procedures cou
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Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be at the metering device entrance to the evaporator. The diffi cult. The following procedures are the more common evaporator in a partial restriction could be partially frosted problems and solutions to these problems. There are two or have an ice ball close to the entrance of the metering types of refrigerant restrictions: Partial restrictions and device. Frost may continue on the suction line back to the
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COMPRESSOR CHECKS WARNING WARNING ELECTRIC SHOCK HAZARD ELECTRIC SHOCK HAZARD Turn off electric power before service or Disconnect power to the unit before installation. Extreme care must be used, if it servicing. Failure to follow this warning becomes necessary to work on equipment with could result in serious injury or death. power applied. Failure to do so could result in serious injury or INTERNAL OVERLOAD death. The compressors are equipped with an internal overload. The overload i
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Single Phase Resistance Test COMPRESSOR REPLACEMENT Remove the leads from the compressor terminals and set Recommended procedure for compressor the ohmmeter on the lowest scale (R x 1). replacement Touch the leads of the ohmmeter from terminals common to start (“C” to “S”). Next, touch the leads of the ohmmeter WARNING from terminals common to run (“C” to “R”). RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power Add values “C” to “S” and “C” to “R” together and to t
