Assessments - 1, GPA: 4 ( )

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NOTES: 1. Pipe sizes are based ona2F (1.1 C) loss for liquid lines and a 1.5 F (0.8 C) loss for suction lines. 2. Pipe sizes are based on an equivalent length equal to the maximum length of interconnecting piping plus 50% for fittings. A more accurate estimate may result in smaller sizes. INSTALL FILTER DRIER(S) AND MOISTURE INDICATOR( S) — Every unit should have a filter drier and liquid- moisture indicator (sight glass). In some applications, depending on space and convenience requirements, it may be desirable to install 2 filter driers and sight glasses. One filter drier and sight glass may be installed at A locations in Fig. 4. Or, 2 filter driers and sight glasses may be installed at B locations. Select the filter drier for maximum unit capacity and minimum pressure drop. Complete the refrigerant piping from indoor unit to outdoor unit before opening the liquid and suction lines at the outdoor unit. TXV—ThermalExpansionValve Fig.4—LocationofSightGlass(es) andFilterDrier(s) INSTALL LIQUID LINE SOLENOID VALVE — SOLENOID DROP — It is recommended that a solenoid valve be placed in the main liquid line (see Fig. 4) between condensing unit (38AE/AKS) and fan coil (40RR, 40RE). (A liquid line solenoid valve is required when the liquid line length exceeds 100 ft [30.5 m] or when the condensing unit is connected to the chiller barrel in a built-up chiller system.) This valve prevents refrigerant migration (which causes oil dilution) to the compressor during the off cycle at low outdoor ambient temperatures. The solenoid should be wired in parallel with the compressor contactor coil. This means of electrical control is referred to as solenoid drop control. INSTALL LIQUID LINE SOLENOID VALVE (OPTIONAL) — CAPACITY CONTROL — If 2-step cooling is desired, place a solenoid valve in the location shown in Fig. 4. MAKE PIPING CONNECTIONS — Do not remove runaround loop from suction and liquid line stubs in the compressor compartment until piping connections are ready to be made. Pass nitrogen or other inert gas through piping while brazing to prevent formation of copper oxide. Install field-supplied thermostatic expansion valve(s) in indoor section. If 2 thermostatic expansion valves are installed for 2-step cooling, install field-supplied liquid line solenoid valve ahead of the second expansion valve. PROVIDE SAFETY RELIEF — A fusible plug is located on the compressor crankcase or in the liquid line (Fig. 5). Do not cap this plug. If local code requires additional safety devices, install them as directed. NOTE:38AKS024hasafusibleplugintheliquidline. Fig.5—LocationofFusiblePlug(38AE) Step 4 — Install Accessories — Field install accessories such as winter start control or low-ambient control before proceeding with wiring. Refer to the instructions shipped with the accessory. Step 5 — Complete Electrical Connections POWER WIRING — Unit is factory wired for voltage shown on nameplate. Provide adequate fused disconnect switch within sight from unit and readily accessible from unit, but out of the reach of children. Lock switch open (off) to prevent power from being turned on while unit is being serviced. Disconnect switch, fuses, and field wiring must comply with national and local code requirements. See Tables 5A and 5B. Route power wires through opening in unit end panel to connection in unit control box as shown on unit label diagram and in Fig. 6. Unit must be grounded. Affix crankcase heater warning sticker to unit disconnect switch. CONTROL CIRCUIT WIRING — Control voltage is 24 v. See Fig. 7 and unit label diagram for field-supplied wiring details. Route control wires through opening in unit end panel to connection in unit control box. LEGEND EQUIP GND — Equipment Ground NEC — National Electrical Code Factory Wiring Field Wiring Fig. 6 — Main Power Supply Wiring 7 LEGEND C— Compressor Contactor R— Relay HD — Heating Device Factory Wiring IFC — Indoor-Fan Contactor Field Wiring LLSV — Liquid Line Solenoid Valve NOTES: 1. Combination LLSV plus IFC va should not exceed 30 va. 2. Do not exceed 5 va (24 vac) per coil. 3. If va values shown in Notes 1 and 2 must be exceeded, use accessory relay transformer package 38AE900001. Fig. 7 — Remote Thermostat Wiring Table 5A — Electrical Data (3 Ph/60 Hz) UNIT UNIT COMPR FAN MOTORS (Single Phase) Model Volts MCA ICF MOCP (Fuse) RLA LRA Total Fans FLA (ea) Fan No. kWNameplate Supplied* Min Max 1 2 38AE012 501 201 601 101 208-230 380 460 575 187 342 414 518 253 418 528 660 62.5 35.0 29.1 22.8 178 101 81 67 100 50 40 35 43.6 24.0 20.0 15.7 170 93 77 62 2 4.3 4.3 2.3 1.8 3.7 3.7 1.9 1.8 1.41 38AE014 501 201 601 101 208-230 380 460 575 187 342 414 518 253 418 528 660 69.3 38.0 31.7 25.6 199 112 84 73 100 60 50 40 49.3 26.5 22.1 17.9 191 104 80 69 2 4.3 4.3 2.3 1.8 3.7 3.7 1.9 1.8 1.41 38AE016 501 201 601 101 208-230 380 460 575 187 342 414 518 253 418 528 660 87.5 49.3 40.7 33.0 274 153 124 100 125 80 60 50 63.6 36.0 29.3 23.8 266 145 120 96 2 4.3 4.3 2.3 1.8 3.7 3.7 1.9 1.8 1.41 38AKS...

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