Carrier PERFORMANCE 50VT-A Installation Instructions Manual

Also see for COMFORT 50VT-A: Owner's information manual Owner's information manual Installation instructions

Contents

Carrier PERFORMANCE 50VT-A Installation Instructions Manual Manual pdf 26 page image

26Step 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 and the unit base for oilaccumulation annually. Detecting oil generally indicates arefrigerant leak.If oil is detected or if low performance is suspected, leak--test allrefrigerant tubing using an electronic leak detector, or liquid--soapsolution. If a refrigerant leak is detected, refer to Check forRefrigerant Leaks section.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. 20 -- Refrigerant CircuitCompressorAccess PanelBlowerAccessPanelControlAccessPanelA09214Fig. 21 -- Unit Access Panels50VT-- A