Carrier 50ZP024 Installation Instructions Manual

Contents

Carrier 50ZP024 Installation Instructions Manual Manual pdf 14 page image

14foreign matter from the pan. Flush the pan and drain tube withclear water. Do not splash water on the insulation, motor, wiring, orair filter(s). If the drain tube is restricted, clear it with a “plumberssnake” or similar probe device. Ensure that the auxiliary drain portabove the drain tube is also clear.Step 5 — Condenser FanUNIT OPERATION HAZARDFailure to follow this caution may result in damage to unitcomponents.Keep the condenser fan free from all obstructions to ensureproper cooling operation. Never place articles on top ofunit.CAUTION!1. Shut off unit power supply.2. Remove condenser--fan assembly (grille, motor, motorcover, and fan) by removing screws and flipping assemblyonto unit top cover.3. Loosen fan hub setscrews.4. Adjust fan height as shown in Fig. 20.5. Tighten setscrews.6. Replace condenser--fan assembly.Step 6 — Electrical Controls and WiringInspect and check the electrical controls and wiring annually. Besure to turn off the electrical power to the unit.Remove the top panel to locate all the electrical controls andwiring. Check all electrical connections for tightness. Tighten allscrew connections. If any smoky or burned connections arenoticed, disassemble the connection, clean all the parts, restrip thewire end and reassemble the connection properly and securely.3.125 in.C00021Fig. 20 -- Condenser--Fan AdjustmentAfter inspecting the electrical controls and wiring, replace all thepanels. Start the unit, and observe at least one complete coolingcycle to ensure proper operation. If discrepancies are observed inoperating cycle, or if a suspected malfunction has occurred, checkeach electrical component with the proper electricalinstrumentation. Refer to the unit wiring label when making thesecheckouts.NOTE: Refer to the Sequence of Operation section, as an aid indetermining proper control operation.Step 7 — Refrigerant CircuitInspect all refrigerant tubing connections and the unit base for oilaccumulations annually. Detecting oil generally indicates arefrigerant leak.If oil is detected or if low cooling performance is suspected,leak--test all refrigerant tubing using an electronic leak--detector, orliquid--soap solution. If a refrigerant leak is detected, refer to Checkfor Refrigerant Leaks sectionIf no refrigerant leaks are found and low cooling performance issuspected, refer to Refrigerant Charge section.Step 8 — Evaporator AirflowThe cooling airflow does not require checking unless improperperformance is suspected. If a problem exists, be sure that allsupply-- and return--air grilles are open and free from obstructions,and that the air filter is clean. When necessary, refer to IndoorAirflow and Airflow Adjustments section to check the systemairflow.Step 9 — Metering DevicesRefrigerant metering devices are fixed orifices and are located inthe inlet header to the evaporator coil.Step 10 — Liquid Line StrainerThe liquid line strainer (to protect metering device) is made of wiremesh and is located in the liquid line on the inlet side of themetering device.TROUBLESHOOTINGRefer to the Troubleshooting Chart (Table 5) for troubleshootinginformation.START--UP CHECKLISTUse the Start--Up Checklist at the back of this manual.50ZP