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

Also see for 50SZ Series: Manual Product data

Contents

e. Inspect coil fins. If damaged during shipping and handling,carefully straighten fins with a fin comb.4. Verify the following conditions:a. Make sure that outdoor-fan blade is correctly positioned infan orifice (See Fig. 16).b. Make sure that condensate drain pan and trap are filledwith water to ensure proper drainage.c. Make sure that all tools and miscellaneous loose parts havebeen removed.5. Compressors are internally spring mounted. Do not loosen orremove compressor holddown bolts.6. Each unit system has 2 Schrader-type ports, one low-sideSchrader fitting located on the suction line, and one high-sideSchrader fitting located on the compressor discharge line. Besure that caps on the ports are tight.7. High flow valves are located on the compressor hot gas andsuction tubes. These valves can not be accessed for service inthe field. Ensure the plastic caps are in place and tight or thepossibility of refrigerant leakage could occur.START-UPUsing the Start-Up Checklist supplied at the end of this book,proceed as follows:Step 1—Check for Refrigerant LeaksLocate and repair refrigerant leaks and charge the unit as follows:1. Use both high- and low-pressure ports to relieve systempressure and reclaim remaining refrigerant.2. Repair leak following accepted practices.NOTE: Install a bi-flow filter drier whenever the system has beenopened for repair.3. Check system for leaks using an approved method.4. Reclaim refrigerant and evacuate refrigerant system to 500microns if no additional leaks are found.5. Charge unit with R-22 refrigerant, using a volumetric-charging cylinder or accurate scale. Refer to unit rating platefor required charge. Be sure to add extra refrigerant tocompensate for internal volume of filter drier.Step 2—Start-Up AdjustmentsComplete the required procedures given in the Pre-Start-Upsection before starting the unit. Do not jumper any safety deviceswhen operating the unit. Do not operate the unit in Cooling modeTable 3—Electrical Data—50SZ(Single Point Connection)UNIT 50SZSIZE V-PH-HZVOLTAGERANGE COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLYMin Max RLA LRA FLA FLA Nominal Kw* FLA MCAMax FuseorCkt BkrMOCP024 208/230–1–60 187 253 10.9 54.0 0.9 2.0-/-3.8/5.07.5/10.05.4/7.2-/-18.1/20.836.1/41.726.0/30.016.5/16.525.1/28.547.6/54.635.0/40.020/2030/3050/6035/40————030 208/230–1–60 187 253 14.0 72.5 0.9 2.0-/-3.8/5.07.5/10.011.3/15.05.4/7.2-/-18.1/20.836.1/41.754.2/62.526.0/30.020.4/20.425.1/28.547.6/54.670.2/80.635.0/40.025/2525/3050/60—35/40———80/90—036 208/230–1–60 187 253 16.0 88.0 0.9 3.1-/-3.8/5.07.5/10.011.3/15.05.4/7.2-/-18.1/20.836.1/41.754.2/62.526.0/30.024.0/24.026.4/29.949.0/56.071.6/82.036.4/41.430/3030/3050/60—40/45———80/90—042 208/230–1–60 187 253 18.4 104.0 0.9 4.1-/-3.8/5.07.5/10.011.3/15.015.0/20.05.4/7.2-/-18.1/20.836.1/41.754.2/62.572.2/83.326.0/30.028.0/28.028.0/31.250.3/57.272.8/83.395.4/109.337.6/42.635/3535/3560/60——40/45———80/90100/110—048 208/230–1–60 187 253 18.3 109.0 1.5 4.1-/-3.8/5.07.5/10.011.3/15.015.0/20.05.4/7.2-/-18.1/20.836.1/41.754.2/62.572.2/83.326.0/30.028.5/28.528.5/31.250.3/57.272.8/83.395.4/109.337.6/42.635/3535/3560/60——40/45———80/90100/110—060 208/230–1–60 187 253 25.0 148.0 1.5 6.2-/-3.8/5.07.5/10.011.3/15.015.0/20.05.4/7.2-/-18.1/20.836.1/41.754.2/62.572.2/83.326.0/30.039.0/39.039.0/39.052.9/59.875.4/85.998.0/111.940.2/45.350/5050/5060/60——50/50———80/90100/125—(See legend following Electrical Data charts)A05108LEGENDFLA — Full Load AmpsLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP — Maximum Overcurrent ProtectionRLA — Rated Load AmpsNOTES:1. In compliance with NEC (National Electrical Code) requirementsfor multimotor and combination load equipment (refer to NECArticles 430 and 440), the overcurrent protective device for theunit shall be Power Supply fuse . The CGA (Canadian GasAssociation) units may be fuse or circuit breaker.2. Minimum wire size is based on 60 C copper wire. If other than60 C wire is used, or if length exceeds wire length in table,determine size from NEC.®10