Carrier 50SZ Series Installation, Start-up And Service Instructions Manual

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Contents

EQIPMENT DAMAGE HAZARDFailure to follow this caution may result in unit componentdamage.Errors made when reconnecting wires may cause improperand dangerous operation. Label all wires prior to disconnect-ing when servicing.The minimum maintenance requirements for this equipment are asfollows:1. Inspect air filter(s) each month. Clean or replace whennecessary.2. Inspect indoor coil, drain pan, and condensate drain eachcooling season for cleanliness. Clean when necessary.3. Inspect blower motor and wheel for cleanliness each coolingseason. Clean when necessary.4. Check electrical connections for tightness and controls forproper operation each cooling season. Service when neces-sary.5. Ensure wires are not contacting refrigerant tubing or sharpsheet metal edges.Step 1—Air FilterIMPORTANT: Never operate the unit without a suitable air filterin the return-air duct system. Always replace the filter with thesame dimensional size and type as originally installed (See Tables1 and 2 for recommended filter sizes.)Inspect air filter(s) at least once each month and replace(throwaway-type) or clean (cleanable-type) at least twice duringeach cooling season or whenever the filter becomes clogged withdust and lint.Step 2—Indoor blower and motorNOTE: All motors are prelubricated. Do not attempt to lubricatethese motors.For longer life, operating economy, and continuing efficiency,clean accumulated dirt and grease from the blower wheel andmotor annually.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.Disconnect and tag electrical power to the unit beforecleaning and lubricating the blower motor and wheel.Step 3—OUTDOOR COIL, INDOOR COIL, ANDCONDENSATE DRAIN PANInspect the condenser coil, evaporator coil, and condensate drainpan at least once each heating and cooling season or sooner ifconditions require.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.On units 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,or air filter(s). If the drain trough is restricted, clear it with a“plumbers snake” or similar probe device. Ensure that the auxiliarydrain port above the drain trough is also clear.Step 4—Outdoor fanUNIT OPERATIONAL 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 of theunit.1. Inspect the fan blades for cracks or bends.Table 7—ELECTRIC HEAT PRESSURE DROP TABLESmall CabinetSTATIC CFM500 600 700 800 900 1000 1100 1200 1300 1400 1500 16005 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.0710 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.1115 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.1820 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19Large CabinetSTATIC CFM1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 25005 kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.1210 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.1315 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.1520 kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.1616