ICP PGN324 Installation Instructions Manual

Contents

11Conditioning Contractors National Association(SMACNA) and Air Conditioning Contractors ofAmerica (ACCA) minimum installation standards forheating and air conditioning systems. Secure all ductsto building structure.7. Flash, weatherproof, and vibration isolate all openingsin building structure in accordance with local codes andgood building practices.Step 10—Install Electrical ConnectionsELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.The unit cabinet must have an uninterrupted, unbrokenelectrical ground. This ground may consist of anelectrical wire connected to the unit ground screw in thecontrol compartment, or conduit approved for electricalground when installed in accordance with NEC,ANSI/NFPA American National StandardsInstitute/National Fire Protection Association (latestedition) (in Canada, Canadian Electrical Code CSAC22.1) and local electrical codes.! WARNINGUNIT COMPONENT DAMAGE HAZARDFailure to follow this caution may result in damage to theunit being installed.1. Make all electrical connections in accordance withNEC ANSI/NFPA (latest edition) and local electricalcodes governing such wiring. In Canada, allelectrical connections must be in accordance withCSA standard C22.1 Canadian Electrical Code Part1 and applicable local codes. Refer to unit wiringdiagram.2. Use only copper conductor for connections betweenfield--supplied electrical disconnect switch and unit.DO NOT USE ALUMINUM WIRE.3. Be sure that high--voltage power to unit is withinoperating voltage range indicated on unit ratingplate. On 3--phase units, ensure phases arebalanced within 2 percent. Consult local powercompany for correction of improper voltage and/orphase imbalance.4. Insulate low--voltage wires for highest voltagecontained within conduit when low--voltage controlwires are in same conduit as high--voltage wires.5. Do not damage internal components when drillingthrough any panel to mount electrical hardware,conduit, etc.! CAUTIONHIGH--VOLTAGE CONNECTIONSWhen routing power leads into unit, use only copper wirebetween disconnect and unit. The high voltage leadsshould be in a conduit until they enter the duct panel;conduit termination at the duct panel must be watertight.The unit must have a separate electrical service with afield--supplied, waterproof disconnect switch mounted at, orwithin sight from, the unit. Refer to the unit rating plate, NECand local codes for maximum fuse/circuit breaker size andminimum circuit amps (ampacity) for wire sizing.The field--supplied disconnect switch box may be mountedon the unit over the high--voltage inlet hole when thestandard power and low--voltage entry points are used (SeeFig. 3 and 4 for acceptable location).See unit wiring label and Fig. 14 for reference when makinghigh voltage connections. Proceed as follows to completethe high--voltage connections to the unit.1. Run the high--voltage (L1, L2) and ground lead into thecontrol box.2. Connect ground lead to chassis ground connection.3. Locate the black and yellow wires connected to the lineside of the contactor.4. Connect field L1 to black wire on connection 11 of thecompressor contactor.5. Connect field wire L2 to yellow wire on connection 23 ofthe compressor contactor.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Before making any wiring changes, make sure the gassupply is switched off first. Then switch off the powersupply to the unit and install lockout tag.! WARNINGCONTROL VOLTAGE CONNECTIONSDo not use any type of power--stealing thermostat. Unitcontrol problems may result.Use no. 18 American Wire Gage (AWG) color--coded,insulated (35_C minimum) wires to make the controlvoltage connections between the thermostat and the unit.If the thermostat is located more than 100 ft from the unit (asmeasured along the control voltage wires), use no. 16 AWGcolor--coded, insulated (35_C minimum) wires.Standard ConnectionRemove knockout hole located in the flue panel adjacent tothe control access panel (See Fig. 3 and 4). Remove therubber grommet from the installer’s packet (included withunit) and install grommet in the knockout opening. Providea drip loop before running wire through panel.FIGURE 10 High and Control Voltage ConnectionsPOWERSUPPLYFIELD-SUPPLIEDFUSED DISCONNECTHIGH VOLTAGEPOWER LEADS(SEE UNIT WIRINGLABEL)GRCONTROL BOXSPLICE BOXLOW-VOLTAGEPOWER LEADS(SEE UNITWIRING LABEL)WYGRCWHT(W1)YEL(Y)GRN(G)RED(R)BRN(C)THERMOSTAT(TYPICAL)