valutazioni - 1, GPA: 5 ( )

Produttore : Carrier File Size : 467.2 kb File Nome : Lingua di insegnamento:

Recover refrigerant prior to brazing. Pass nitrogen or other inert gas through piping while brazing to prevent formation of copper oxide. Install field-supplied thermostatic expansion valve to evaporator section. It is recommended that a field-supplied liquid line solenoid be positioned in the main liquid line close to the evaporator coil, and wired to close when compressor stops to minimize refrigerant migration during the ‘‘OFF’’ cycle. Table 4A — Liquid Line Data — 60 Hz UNIT 38 MAX ALLOWABLE LIQUID LIFT LIQUID LINE Max Allowable Pressure Drop Max Allowable Temp Loss Ft M psi kPa F C AK007 86 26.2 7 48.3 2 1 AK008 60 18.3 7 48.3 2 1 AK012 70 21.3 7 48.3 2 1 AKS008 60 18.3 7 48.3 2 1 AKS009 65 19.8 7 48.3 2 1 AKS012 65 19.8 7 48.3 2 1 NOTE: Values shown are for units operating at 45 F (7.2 C) saturated suction and 95 F (35 C) entering air. Table 4B — Liquid Line Data — 50 Hz UNIT 38 MAX ALLOWABLE LIQUID LIFT LIQUID LINE Max Allowable Pressure Drop Max Allowable Temp Loss Ft M psi kPa F C AK007 76 23.2 7 48.3 2 1 AK008 50 15.2 7 48.3 2 1 AK012 57 17.4 7 48.3 2 1 AKS008 50 15.2 7 48.3 2 1 AKS009 52 15.8 7 48.3 2 1 AKS012 52 15.8 7 48.3 2 1 NOTE: Values shown are for units operating at 45 F (7.2 C) saturated suction and 95 F (35 C) entering air. Step 4 — Make Electrical Connections Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC ANSI (American National Standards Institute)/NFPA (National Fire Protection Association) 70 (U.S.A. Standards) and local electrical codes. Failure to follow this warning could result in the installer being liable for personal injury of others. FIELD POWER SUPPLY — All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v orange wire on the transformer and connecting it to the 208-v red wire from the transformer. The end of the orange wire must then be insulated. Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use factory- supplied splices or UL (Underwriters’ Laboratories) (U.S.A. Standard) approved copper/aluminum connector. When installing units, provide a disconnect per NEC. All field wiring must comply with NEC and local requirements. Install field wiring as follows: 1. Install conduit through side panel openings. 2. Install power lines to connections as shown in Fig. 5. Wrap connections with electrical tape. Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Table 5). Voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 5, Note 2, to determine the percent voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty. 208/230-3-60 380-3-60 460-3-60 575-3-60 220-3-50 400-3-50 LEGEND C— Contactor Factory Wiring NEC — National Electrical Code Splice Connection Field Wiring (Factory Supplied) Fig. 5 — Power Wiring Connections 6 Table 5 — Electrical Data UNIT 38 NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE COMPRESSOR OFM POWER SUPPLY MIN MAX RLA LRA FLA MCA MOCP 208/230-3-60 187 254 21.8 142 1.9 25.6 35 460-3-60 414 508 9.6 72 1.0 12.9 15 AK007 575-3-60 518 632 7.6 58 1.9 11.4 15 220-3-50 198 242 19.0 142 1.0 25.6 35 400-3-50 360 440 9.5 72 1.0 12.9 15 208/230-3-60 187 254 28.8 195 3.8 39.8 45 460-3-60 414 508 14.7 95 1.9 20.3 20 AK008 575-3-60 518 632 10.8 80 1.9 15.4 15 220-3-50 198 242 28.8 195 1.5 37.5 45 400-3-50 360 440 14.7 90 1.5 19.9 20 208/230-3-60 187 254 37.8 239 3.1 46.2 60 460-3-60 414 508 17.2 125 1.4 22.7 30 AK012 575-3-60 518 632 12.3 80 1.4 19.3 25 220-3-50 198 242 37.8 239 1.4 46.2 60 400-3-50 360 440 17.2 125 1.4 22.7 30 208/230-3-60 187 254 31.5 160 3.1 42.5 50 380-3-60 342 418 19.0 75 2.2 26.0 35 AKS008 460-3-60 575-3-60 414 518 508 632 15.7 12.6 80 64 1.4 1.4 21.0 17.2 25 20 220-3-50 198 253 31.5 160 1.4 42.5 50 400-3-50 342 460 15.7 80 1.4 21.0 25 208/230-3-60 187 254 39.7 198 3.1 52.7 70 380-3-60 342 418 24.0 93 2.2 32.2 40 AKS009 460-3-60 575-3-60 414 518 508 632 19.9 15.9 99 79 1.4 1.4 26.3 21.3 35 25 220-3-50 198 253 39.7 198 1.4 52.7 70 400-3-50 342 460 19.9 99 1.4 26.3 35 208/230-3-60 187 254 39.7 198 3.1 52.7 70 380-3-60 342 418 24.0 93 2.2 32.2 40 AKS012 460-3-60 575-3-60 414 518 508 632 19.9 15.9 99 79 1.4 1.4 26.3 21.3 35 25 220-3-50 198 253 39.7 198 1.4 52.7 70 400-3-50 342 460 19.9 99 1.4 26.3 35 LEGEND CSA — Canadian Standards Association FLA — Full Load Amps HACR — Heating, Air Conditio...

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