Page 1: ...sted above You should become familiar with these instructions as it will be helpful in avoiding any needless service costs or operational problems Keep these instructions as long as you keep your equipment for future reference If any of the documents are missing or illegible contact your installer or equipment manufacturer for replacement Throughout this manual when we use the word you we refer to...
Page 2: ...ation work should begin until this inspection is completed The manufacturer assumes no responsibility for installation of incorrectly shipped units To alert you to potential hazards we use the signal words WARNING and CAUTION throughout this manual WARNING alerts you to situations that could cause or result in serious injury or death CAUTION alerts you to situations that could cause or result in m...
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Page 4: ...holes in the base pan must be kept clear 12 Clearance around unit 18 Clearance for Service Area 60 Clearance Above Unit To Indoor Coil NEC Class 1 Wiring Power Supply NEC Class 2 Wiring Thermostat To Indoor Air Handler or Furnace Figure 2 Typical Location and Clearances SECTION 4 REFRIGERANT PIPING CONNECTIONS Undersized line sets will increase the refrigerant pressure drop between the indoor evap...
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Page 6: ...t is under pressure Guard against refrigerant spraying into the face or on skin Always wear protective equipment i e safety glasses or goggles and gloves when working with refrigerant SUBCOOLING CHARGING METHOD The subcooling charging method is to be used on units which have Thermostatic Expansion Valve TXV as the expansion device For proper subcooling readings a standard high side gauge is requir...
Page 7: ...he system in operation check the condensing unit for unusual noise and undue vibration 5 Allow the system to operate until it is balanced or stabilized approximately 30 minutes before making further checks 6 Remove manifold gage hoses and install cap on Schrader valves SECTION 8 MAINTENANCE CAUTION Be sure the unit disconnect is in the OFF position and that all electrical power to the unit is turn...
Page 8: ...l Subcooling Chart for units with Thermostatic Expansion Valves 4 6 8 10 12 14 16 18 60 65 70 75 80 85 90 95 100 105 110 115 OUTDOOR TEMPERATURE deg F SUBCOOLING deg F Remove Refrigerant Add Refrigerant Figure 3 Subcooling Charging Chart ...
Page 9: ...ncorrect voltage Defective overload protector Refrigerant undercharge At compressor terminals voltage must be 10 of nameplate marking when unit is operating Replace check for correct voltage Add refrigerant High head pressure Low suction pressure Restriction in liquid line expansion device or filter drier Lack of sufficient indoor airflow Remove or replace defective component Clean check filters r...
