Carrier PHD4 F Series Installation Instructions Manual

51801200404 33Specifications are subject to change without notice.Step 2 — Outdoor Coil, Indoor Coil, andCondensate Drain PanInspect the condenser coil, evaporator coil, and condensate drainpan at least once each year.The coils are easily cleaned when dry; therefore, inspect and cleanthe coils either before or after each cooling season. Remove allobstructions, including weeds and shrubs, that interfere with theairflow through the condenser coil.Straighten bent fins with a fin comb. If coated with dirt or lint,clean the coils with a vacuum cleaner, using the soft brushattachment. Be careful not to bend the fins. If coated with oil orgrease, clean the coils with a mild detergent--and--water solution.Rinse coils with clear water, using a garden hose. Be careful not tosplash water on motors, insulation, wiring, or air filter(s). For bestresults, spray condenser coil fins from inside to outside the unit. Onunits with an outer and inner condenser coil, be sure to cleanbetween the coils. Be sure to flush all dirt and debris from the unitbase.Inspect the drain pan and condensate drain line when inspectingthe coils. Clean the drain pan and condensate drain by removing allforeign matter from the pan. Flush the pan and drain trough 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.Step 3 — Outdoor FanKeep the condenser fan free from all obstructions to ensure propercooling operation. Never place articles on top of the unit. Damageto unit may result.1. Remove 6 screws holding outdoor grille and motor to topcover.2. Turn motor/grille assembly upside down on top cover toexpose fan blade.3. Inspect the fan blades for cracks or bends.4. If fan needs to be removed, loosen setscrew and slide fan offmotor shaft.5. When replacing fan blade, position blade back to same posi-tion as before.6. Ensure that setscrew engages the flat area on the motor shaftwhen tightening.7. Replace grille.Step 4 — Electrical Controls and WiringInspect and check the electrical controls and wiring annually. Besure to turn off the electrical power to the unit.Remove access panels (see Fig 22) to locate all the electricalcontrols and wiring. Check all electrical connections for tightness.Tighten all screw connections. If any discolored or burnedconnections are noticed, disassemble the connection, clean all theparts, restrip the wire end and reassemble the connection properlyand securely.After 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.Step 5 — Refrigerant CircuitInspect all refrigerant tubing connections.If low performance is suspected, leak--test all refrigerant tubingusing an electronic leak detector, or liquid--soap solution. If arefrigerant leak is detected, refer to Check for Refrigerant Leakssection.If no refrigerant leaks are found and low performance is suspected,refer to Checking and Adjusting Refrigerant Charge section.Step 6 — Indoor AirflowThe heating and/or cooling airflow does not require checkingunless improper performance is suspected. If a problem exists, besure that all supply--air and return--air grilles are open and freefrom obstructions, and that the air filter is clean. When necessary,refer to Indoor Airflow and Airflow Adjustments section to checkthe system airflow.Step 7 — Metering Devices--TXV & PistonThis unit uses 2 types of metering devices. The outdoor meteringdevice is a fixed orifice and is contained in the brass hex--body ineach liquid line feeding the outdoor coils. The indoor meteringdevice is a TXV type device.C99097Fig. 22 -- Refrigerant CircuitCOMPRESSORACCESS PANELBLOWERACCESSPANELCONTROLACCESSPANELA09207Fig. 23 -- Unit Access PanelsStep 8 — Pressure SwitchesPressure switches are protective devices wired into control circuit(low voltage). They shut off compressor if abnormally high or lowpressures are present in the refrigeration circuit. These pressureswitches are specifically designed to operate with R--410Asystems. R--22 pressure switches must not be used as replacementsfor the R--410A system.PH4D, WPH4