Carrier 50JZ024 Installation, Start-up And Service Instructions Manual

Also see for 50JZ024: Installation and operating instructions Guide to operating and maintaining Guide to operating and maintaining Product data Product data

Contents

2. Remove horizontal duct covers to access bottom return andsupply knock out panels.3. Use a screwdriver and hammer to remove the panels in thebottom of the base pan.NOTE: These panels are held in place with tabs similar to anelectrical knockout.4. Reinstall horizontal duct covers (Fig. 10) to block off thehorizontal air openings.NOTE: Avoid abrupt duct size increases and reductions. Abruptchange in duct size adversely affects air performance.Step 6—Provide for Condensate DisposalNOTE: Ensure that condensate-water disposal methods complywith local codes, restrictions, and practices.The 50JZ units dispose of condensate through a 3/4 -in. NPTfemale fitting that exits on the compressor end of the unit.Condensate water can be drained directly onto the roof in rooftopinstallations (where permitted) or onto a gravel apron in groundlevel installations. Install a field-supplied condensate trap at end ofTable 1—Physical Data—Unit 50JZUNIT SIZE 024 030 036 042 048 060NOMINAL CAPACITY (ton) 2 2 1/2 3 3-1/2 4 5OPERATING WEIGHT (lb) 299 320 328 350 355 428COMPRESSOR QUANTITY 1 1 1 1 1 1TYPE SCROLL COMPRESSORREFRIGERANT R-410AREFRIGERANT METERING DEVICE AccuRater®Refrigerant (R-410A) Quantity (lb.) 7.0 8.9 9.3 9.5 10.6 12.4ORIFICE ID (in.) 0.061 0.061 0.067 0.073 0.076 0.088ORIFICE OD (in.) 2@0.032 2@0.040 2@0.040 2@0.038 2@0.046 2@0.052OUTDOOR COILRows...Fins/in.Face Area (sq ft)2...178.52...1710.32...1710.32...1713.52...1713.52...1715.4OUTDOOR FANNominal Airflow (CFM)DiameterMotor HP (RPM)2350221/8 (825)2350221/8 (825)2800221/4 (1100)2500221/8 (825)3300221/4 (1100)3300221/4 (1100)INDOOR COILRows...Fins/in.Face Area (Sq Ft)3...153.73...153.74...153.73..154.74...154.74...155.7INDOOR BLOWERNominal Airflow (CFM)Size (in.)Motor (HP)80010x101/4100010x101/4120010x101/2140011x101/2160011x101/2175011x101HIGH-PRESSURE SWITCH (psig)CutoutReset (Auto)610 ± 15420 ± 25LOSS-OF-CHARGE/LOW-PRESSURE SWITCH(Liquid Line) (psig)CutoutReset (Auto)20 ± 545 ± 10RETURN-AIR FILTERS (in.)*Throwaway 20x20x1 20x20x1 20x24x1 24x30x1 24x30x1 24x30x1* Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300ft/minute for throwaway type or 450 ft/minute for high-capacity type. Air filter pressure drop for non-standard filters must not exceed 0.08 in. wg.Table 2—Minimum Airflow for Reliable ElectricHeater Operation 50JZ (Cfm)SIZE 024 030 036 042 048 060AIRFLOW (CFM) 800 1000* 1200 1400 1600 2000* The 030 size models must be run on medium or high speed when used inconjunction with 15 Kw electric heat accessory.Fig. 9—Typical InstallationC00063INDOORTHERMOSTATDISCONNECTPER NEC*FROMPOWERSOURCERETURNAIRTOP COVER*NEC - NATIONAL ELECTRICAL CODEFig. 10—50JZ with Duct Covers OnC00092Duct Covers7