Carrier Gemini 38AU07 Series Installation Instructions Manual

Contents

12Select the filter drier for maximum unit capacity and mini-mum pressure drop. Complete the refrigerant piping from theindoor unit to the outdoor unit before opening the liquid andsuction lines at the outdoor unit.INSTALL LIQUID LINE SOLENOID VALVEIt is recommended that a solenoid valve be placed in themain liquid line (see Fig. 9 and 10) between the condensingunit and the evaporator coil. Locate the solenoid valve at theoutlet end of the liquid line, near the evaporator coil connec-tions, with flow direction arrow pointed at the evaporatorcoil. Refer to Table 12. (A liquid line solenoid valve is re-quired when the liquid line length exceeds 75 ft [23 m].) Thisvalve prevents refrigerant migration (which causes oil dilu-tion) to the compressor during the off cycle, at low outdoorambient temperatures. Wire the solenoid in parallel with thecompressor contactor coil (see Fig. 9 and 10). This means ofelectrical control is referred to as solenoid drop control.Fig. 9 — Location of Sight Glass(es) and FilterDriers Typical 38AUZ SystemsFig. 10 — Location of Sight Glasses and FilterDriers Typical 38AUD SystemsTable 12 — Refrigerant Specialties Part NumbersSolenoid Drop Control WiringControl the power to the liquid line solenoid through a So-lenoid Valve Relay (SVR) in all units. Use part numberHN61PC005 (field-supplied, installed). 38AUZ unit requiresone SVR; 38AUD unit requires two relays.A unit with two liquid line solenoid valves also requires aseparate control power transformer for the liquid solenoidvalve loads. Select TRAN3 transformer part number accord-ing to unit power supply.LEGEND* Install as SVR-2 (SVR-1 is factory-installed).INDOORCOIL CKT 2AIRFLOWINDOORCOIL CKT 1AIRFLOW15 DIAMSMIN 10DIAMS8 DIAMSMINTXVSENSINGBULBEQUALIZER LINESIGHT GLASSA LOCATIONSIGHTGLASSESB LOCATIONTXVCKT 2FILTER DRIERA LOCATIONFILTERDRIERSB LOCATIONFLOWTXVSENSINGBULBTXVCKT 18 DIAMSMIN15 DIAMSMIN 10DIAMSSINGLE CIRCUIT COIL PIPING CONFIGURATIONFOR SINGLE COMPRESSOR CONDENSING UNITSDUAL CIRCUIT COIL PIPING CONFIGURATIONFOR SINGLE COMPRESSOR CONDENSING UNITS15 DIAMSMIN 10DIAMS8 DIAMSMININDOORCOIL CKTAIRFLOWTXVSENSINGBULBEQUALIZER LINESIGHT GLASSA LOCATIONTXVFILTER DRIERA LOCATIONLIQUID LINESOLENOIDVALVEFLOWLIQUID LINESOLENOIDVALVELIQUIDLINESIZELIQUID LINESOLENOIDVALVE(LLSV)LLSV COIL SIGHTGLASSFILTERDRIER3/ 8 EF680033 EF680037 KM680008 Provided withunit, seeTable 111/ 2 EF680035 EF680037 KM6800045/ 8 EF680028 EF680032 KM680005MODEL QTYLSVRELAY SVR QTY- PART NUMBERTRAN3 PRIMARY V:PART NUMBER38AUZ 1 1 — HN61PC005 N/R2 2 — HN61PC005 208/230V: HT01BD20238AUDA,B 2 2 — HN61PC005 460V: HT01BD702575V: HT01BD90238AUDC 2 1 — HN61PC005 N/R #LSV — Liquid Solenoid ValveSVR — Solenoid Valve RelayN/R — Not RequiredN/R # — Not Required / Factory InstalledAIRFLOWSUCTIONCIRCUIT 2SUCTIONCIRCUIT 1AIRFLOW15 DIAMSMIN 10DIAMS8 DIAMSMINTXVSENSINGBULBEQUALIZER LINESIGHTGLASSESTXVCKT 2FILTERDRIERSLIQUID LINESOLENOID VALVECIRCUIT 2FLOWLIQUID LINESOLENOID VALVECIRCUIT 1FLOWTXVSENSINGBULBTXVCKT 18 DIAMSMIN15 DIAMSMIN 10DIAMSDUAL CIRCUIT COIL PIPING CONFIGURATIONFOR TWO CIRCUIT CONDENSING UNITS