Carrier 50ZH024-060 Installation, Start-up And Service Instructions Manual

Also see for 50ZH024: Product data Installation instructions

Contents

4. Connect the RED lead to the BLK wire from which the ORGlead was disconnected. Insulate with wirenut from Step 1.5. Using the wirenut removed from the RED lead, insulate theloose terminal on the ORG lead.6. Wrap the wirenuts with electrical tape so that the metalterminals cannot be seen.Indoor blower-motor speeds may need to be changed for 208-voperation. Refer to Indoor Airflow and Airflow Adjustmentssection. (See Table of Contents for page number.)PRE-START-UPFailure to observe the following warnings could result inserious injury or death:1. Follow recognized safety practices and wear protectivegoggles when checking or servicing refrigerant system.2. Do not operate compressor or provide any electric power tounit unless compressor terminal cover is in place andsecured.3. Do not remove compressor terminal cover until all electri-cal sources are disconnected and lockout tag is installed.4. Relieve all pressure from both high- and low-pressure sidesof the system before touching or disturbing anything insideterminal box if refrigerant leak is suspected around com-pressor terminals. Use accepted methods to recover refrig-erant.5. Never attempt to repair soldered connection while refrig-erant system is under pressure.6. Do not use torch to remove any component. Systemcontains oil and refrigerant under pressure. To remove acomponent, wear protective goggles and proceed as fol-lows:a. Shut off electrical power to unit and install lockout tag.b. Relieve all refrigerant from system using both high- andlow-pressure ports. Use accepted methods to recoverrefrigerant.c. Cut component connecting tubing with tubing cutter andremove component from unit.d. Carefully unsweat remaining tubing stubs when neces-sary. Oil can ignite when exposed to torch flame.Use the Start-Up Checklist supplied at the end of this book andproceed as follows to inspect and prepare the unit for initialstart-up:1. Remove all access panels.2. Read and follow instructions on all DANGER, WARNING,CAUTION, and INFORMATION labels attached to, orshipped with, unit.Make the following inspections:a. Inspect for shipping and handling damages such as brokenlines, loose parts, disconnected wires, etc.b. Inspect for oil at all refrigerant tubing connections and onunit base. Detecting oil generally indicates a refrigerantleak. Leak-test all refrigerant tubing connections usingelectronic leak detector, or liquid-soap solution. If a refrig-erant leak is detected, see following Check for RefrigerantLeaks section.c. Inspect all field- and factory-wiring connections. Be surethat connections are completed and tight. Ensure wires donot contact refrigerant tubing or sheet metal edges.d. Inspect coil fins. If damaged during shipping and handling,carefully straighten fins with a fin comb.3. Verify the following conditions:a. Make sure that outdoor-fan blade is correctly positioned infan orifice. Top edge of blade should be 3.125 in. downfrom outdoor coil outlet grille (size 024–048, See Fig. 21)or hub should be 0.708-in. away from motor end bell (size060, See Fig. 22). See Outdoor Fan Adjustment section.b. Make sure that air filter is in place.c. Make sure that condensate drain trap is filled with water toensure proper drainage.d. Make sure that all tools and miscellaneous loose parts havebeen removed.START-UPUse the Start-Up Checklist supplied at the end of this book andproceed as follows:Fig. 11—Unit Electrical ConnectionC00010HIGH-VOLTAGEPOWER WIRINGENTRY HOLELOW-VOLTAGEWIRING ENTRYHOLEFig. 12—Control Box WiringC00011ELECTRICHEATERFUSESGROUNDLUGINDOORFANRELAYOUTDOOR FAN MOTORAND COMPRESSORSTART CAPACITORHIGHVOLTAGELEADS9