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© 2010-2012 Goodman Manufacturing Company, L.P.
CONDENSING AC UNIT
5151 San Felipe, Suite 500, Houston, TX 77056
www.goodmanmfg.com -or- www.amana-hac.com
SINGLE / THREE PHASE AIR CONDITIONERS
P/N: IO-402G Date: May 2012
INSTALLATION & SERVICE REFERENCE
NOTICE
CAUTION
THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM
Scroll equipped units should never be used to evacuate
HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED
the air conditioning system. Vacuums this low can cause
AND CHARGED PER INSTALLATION I
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Installation Clearances Safe Refrigerant Handling Special consideration must be given to location of the con- While these items will not cover every conceivable situation, densing unit(s) in regard to structures, obstructions, other units, they should serve as a useful guide. and any/all other factors that may interfere with air circulation. Where possible, the top of the unit should be completely unob- WARNING structed; however, if vertical conditions require placement be- To avoid possible inj
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Use only refrigerant grade (dehydrated and sealed) copper tub- ing to connect the condensing unit with the indoor evaporator. After cutting the tubing, install plugs to keep refrigerant tubing clean and dry prior to and during installation. Tubing should always be cut square keeping ends round and free from burrs. Clean the tubing to prevent contamination. Do NOT let refrigerant lines come in direct contact with plumb- ing, ductwork, floor joists, wall studs, floors, and walls. When running re
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3. After brazing, quench the joints with water or a wet cloth Refrigerant Line Connections to prevent overheating of the service valve. NOTICE 4. Ensure the filter drier paint finish is intact after brazing. If THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM the paint of the steel filter drier has been burned or chipped, HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED repaint or treat with a rust preventative. This is especially AND CHARGED PER INSTALLATION INSTRUCTIONS important on suction line filt
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NOTICE 5000 THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM 4500 HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED 4000 AND CHARGED PER INSTALLATION INSTRUCTIONS LEAK(S) 3500 WITH REFRIGERANT LISTED ON SERIAL RATING PLATE. PRESENT 3000 2500 NOTICE 2000 UNITS SHIPPED WITH A HOLDING CHARGE ARE CONDENSIBLES OR SMALL 1500 LEAK PRESENT INTENDED FOR COMPONENT REPLACEMENT ONLY ON 1000 EXISTING SYSTEMS, AND NOT INTENDED FOR USE IN NO LEAKS NEW SYSTEMS OR NEWLY CONSTRUCTED HOMES. 500 NO CONDENSIBLES EPA REGULATIO
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Local codes often require a disconnect switch located near the System Start Up unit; do not install the switch on the unit. Refer to the installa- tion instructions supplied with the indoor furnace/air handler for CAUTION specific wiring connections and indoor unit configuration. Like- POSSIBLE REFRIGERANT LEAK wise, consult the instructions packaged with the thermostat To avoid a possible refrigerant leak, open the service for mounting and location information. valves until the top of the st
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Charge Verification CAUTION Operating the compressor with the suction valve closed WARNING may cause serious compressor damage. REFRIGERANT UNDER PRESSURE! • Do not overcharge system with refrigerant. Final Charge Adjustment • Do not operate unit in a vacuum or at negative pres- sure. The outdoor temperature must be 60°F or higher. Set the room Failure to follow proper procedures may cause thermostat to COOL, fan switch to AUTO, and set the tem- property damage, personal injury or death. pe
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SATURATED SUCTION PRESSURE SATURATED LIQUID PRESSURE TEMPERATURE CHART TEMPERATURE CHART SATURATED SUCTION SATURATED LIQUID LIQUID PRESSURE SUCTION PRESSURE TEMPERATURE ºF TEMPERATURE ºF PSIG R-22 PSIG R-22 50 26 200 101 52 28 210 105 54 29 220 108 56 31 225 110 58 32 235 113 60 34 245 116 62 35 255 119 64 37 265 121 66 38 275 124 68 40 285 127 70 41 295 130 72 42 305 133 74 44 325 137 76 45 355 144 78 46 375 148 80 48 405 155 85 50 415 157 90 53 425 n/a 95 56 435 n/a 100 59 445 n/a 110 6
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3. Check subcooling and superheat. Systems with TXV ap- Fixed Orifice plication should have a subcooling of 7 ± 2 ºF and super- heat of 8 ± 1 ºF. CAUTION a. If subcooling and superheat are low, adjust TXV to To prevent personal injury, carefully connect and disconnect 8 ± 1 ºF superheat, then check subcooling. manifold gauge hoses. Escaping liquid refrigerant can cause burns. Do not vent refrigerant into the atmosphere. Recover all NOTE: To adjust superheat, turn the valve stem clock- refrigeran
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Troubleshooting Information System Unsatisfactory Complaint No Cooling Operating Cooling Pressures POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" Power Failure • Test Voltage Blown Fuse ••• Impact Fuse Size & Type Loose Connection • ••• Inspect Connection - Tighten Shorted or Broken Wires •••••• Test Circuits with Ohmmeter Open Overload Test Continuity of Overloads •• Faulty Thermostat ••• • Test Continuity of Thermostat and Wiring Faulty Transformer •• Che
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SPLIT SYSTEMS AIR CONDITIONING AND HEAT PUMP HOMEOWNER’S ROUTINE MAINTENANCE RECOMMENDATIONS We strongly recommend a bi-annual maintenance checkup be performed before the heating and cooling seasons begin by a qualified servicer. REPLACE OR CLEAN FILTER CLEAN OUTSIDE COIL (QUALIFIED SERVICER ONLY) IMPORTANT NOTE: Never operate unit without a filter installed as dust and lint will build up on internal parts resulting in loss of efficiency, equipment damage and possible fire. An indoor air filter
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© 2010 Goodman Manufacturing Company, L.P. CONDENSING AC UNIT 5151 San Felipe, Suite 500, Houston, TX 77056 3-PHASE 7.5 & 10 TON AIR CONDITIONER www.goodmanmfg.com -or- www.amana-hac.com P/N: IO-404A Date: May 2012 INSTALLATION & SERVICE REFERENCE NOTICE THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM HOLDING CHARGE ONLY. UNIT MUST BE EVACUATED AND CHARGED PER INSTALLATION INSTRUCTIONS WITH REFRIGERANT LISTED ON SERIAL RATING PLATE. NOTICE UNITS SHIPPED WITH A HOLDING CHARGE ARE INTENDED FOR COMP
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Another important consideration in selecting a location for the unit(s) is the angle to obstructions. Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance. Corner installations are strongly discouraged. 12" 60" 12" Use field-supplied spreader bars when lifting the unit to mini- 24" mize the possibility of lifting cable/straps damage. To protect the cabinet louvers, use protective material such as plywood
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WARNING To avoid possible explosion, use only returnable (not disposable) service cylinders when removing refrig- erant from a system. • Ensure the cylinder is free of damage which could lead to a leak or explosion. • Ensure the hydrostatic test date does not exceed 5 years. • Ensure the pressure rating meets or exceeds 400 lbs. When in doubt, do not use cylinder. Refrigerant Lines NOTE: For improved refrigerant management, equip the evaporator coil with a field-supplied therma
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Pressure test the system using dry nitrogen and soapy water Refrigerant Line Connections to locate leaks. If you wish to use a leak detector, charge the system to 10 psi using the appropriate refrigerant then use NOTICE nitrogen to finish charging the system to working pressure then THIS UNIT IS SHIPPED WITH A NITROGEN/HELIUM apply the detector to suspect areas. If leaks are found, repair HOLDING CHARGE ONLY. UNIT MUST BE them. After repair, repeat the pressure test. If no leaks exist, EVACU
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RATED MINIMUM SUPPLY MAXIMUM SUPPLY 5000 VOLTAGE VOLTAGE VOLTAGE 4500 4000 208/230V 197 253 LEAK(S) 3500 460V 414 506 PRESENT 3000 The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protec- 2500 tion. Wires should be sized to limit voltage drop to 2% (max.) 2000 from the main breaker or fuse panel to the condensing unit. CONDENSIBLES OR SMALL 1500 Consult the NEC, CEC, and all local codes to determine the LEAK PRESENT 1000 co
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To correct, disconnect power and switch any two leads at the Example: unit contactor and re-observe. A 7 ½ Ton unit is to be installed. The distance from the building to the unit is 75’. Calculate the minimum wire size High Voltage Connections assuming no more than 2% voltage drop. Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram pro- MCA for 7 ½ Ton 230V unit = 43.3 (from S&R plate). vided inside the control panel cover. App
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For the 7-1/2 ton unit starting charge should be 15 lb of R-22 c. If subcooling and superheat are high, adjust TXV and 18 lbs for the 10 ton unit. The length of line set, indoor unit valve to 9 ± 1 ºF superheat, then check subcooling. airflow, condensing unit location and number of tubing fittings d. If subcooling is high and superheat is low, adjust will have an impact on final unit charge amount. Turn the elec- TXV valve to 9 ± 1 ºF superheat and remove charge trical power on, and let the syst
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TROUBLESHOOTING ANALYSIS TABLE COMPLAINT PROBABLE CAUSE REMEDY 1. Excessive charge of refrigerant in system. 1. Purge or pump-down excessive charge. 2. Inadequate supply of air across the 2. Make certain that coil is not fouled in any 1. High Head Pressure condenser coil. way, or that air is not re-circulating. 3. Non-condensate gases in the system. 3. Purge these gases from the system. Recharge system, if necessary. 1. System low on refrigerant. 1. Charge system until sight glass is clear of bu
