Carrier 50Ah Users Manual 6pd
50AH to the manual 48f8edfe-009b-45b2-9947-a407b0121366
2015-01-24
: Carrier Carrier-50Ah-Users-Manual-310462 carrier-50ah-users-manual-310462 carrier pdf
Open the PDF directly: View PDF 
.
Page Count: 16
| Download | |
| Open PDF In Browser | View PDF |
Product Data 50AH Horizontal Indoor Single-Package Cooling Units 2 to 5 Nominal Tons Single Package Cooling Units Featuring: • compact design • flexibility • easy maintenance • high quality and reliability • quiet and efficient scroll compressor technology Features/Benefits All in one package — high cooling efficiency, installation convenience, ease of accessibility for timesaving maintenance. Space and cost saving design Model 50AH is specifically designed to provide the building owner with truly outof-sight cooling, because it installs inside the ceiling. That’s why we call it the Carrier ROOMTOP® unit. The compact design and low silhouette enable it to fit easily and securely above the conditioned space. Single-package construction makes it easy to install with minimal time and cost. Application flexibility If desired for particular applications, the unit can also be installed as a split system with the condenser section mounted horizontally. Centrifugal fans permit ducting of both evaporator and condenser air. Quiet operation Commercial end users appreciate the extra comfort of quiet operation. Carrier engineers met the challenge by specifying heavy insulation, vibration-resistant construction and operating components that function at low noise levels, all of which keep system sound at a minimum level. Easy maintenance When it comes to maintenance, the 50AH rates high in accessibility. Indoor Copyright 2002 Carrier Corporation Form 50AH-6PD location is ideal for the maintenance technician, and five access panels, easily removed, provide quick and convenient access to all components when needed. As an added plus, all required service/ maintenance access can be from one side allowing the unit to be located against a wall or ceiling plenum obstruction, an obvious space-saving idea. Carrier quality and reliability Scroll compressor technology The Carrier 50AH ROOMTOP® units have much to offer the cost- and efficiency-conscious commercial owner. Every unit is thoroughly run tested at the factory and equipped with safety controls designed to monitor and protect over the life of the unit. Scroll compressors are designed for high efficiency and are internally spring mounted to minimize vibration noise. Each compressor is hermetically sealed against contamination to promote longer life and dependable operation. Scroll compressors are standard on all units. Table of contents Page Quality Assurance Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2 Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10 Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12 Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,15 ISO 23 25 ® 90 01:2000 #A Model number nomenclature 50AH – 048 – M – 5 4 1 XX Model Designation – 50AH Horizontal, Indoor Single-Package Cooling Unit FIOP* Packaging 1 – Domestic 2 – Export Nominal Tons 048 – 4 024 – 2 060 – 5 036 – 3 Design Revision Indoor Fan Motor – – Standard Motor M – 1.5 hp Optional Motor Voltage 3 – 230-1-60 5 – 208/230-3-60 6 – 460-3-60 *FIOP — Factory-Installed option, contact your Carrier representative for details. ARI* capacity ratings UNIT 50AH 024 036 048 060 V-PH-Hz 230-1-60 230-1-60 208/230-3-60 460-3-60 230-1-60 208/230-3-60 460-3-60 230-1-60 208/230-3-60 460-3-60 TOTAL kW 2.56 NET TOTAL COOLING CAP. (Btuh) 24,800 NOMINAL CFM 800 4.3 36,000 1200 5.63 49,500 1600 6.9 58,500 2000 LEGEND dB — Decibels EER — Energy Efficiency Ratio SEER — Seasonal Energy Efficiency Ratio TDR — Time-Delay Relay *Air-conditioning and Refrigeration Institute. †TDR is standard. 2 EER SEER — — 8.40 8.40 — 8.80 8.80 — 8.50 8.50 — 10.00 — — — — — 9.70 — — NOTES: 1. Ratings are at zero condenser air static and rated in accordance with ARI Standard 210. NET CAPACITY (Btuh) 2. EER = TOTAL WATTS SEER (with TDR) 10.50† 10.00 — — 10.00† — — 10.00 — — SOUND RATING (dB) 78 82 82 82 Physical data UNIT 50AH SHIPPING WEIGHT (lb)* OPERATING WEIGHT (lb) Base Unit, Evaporator/Condenser Section REFRIGERANT TYPE Operating Charge (lb)† COMPRESSOR — TYPE Quantity...Model Oil (oz) HPS Setting (psig) Cutout Reset LPS Setting (psig) Cutout Reset CONDENSATE DRAIN CONNECTION Size (in.)...Type CONDENSER COIL Size (L x H) (in.) Number of Rows...Fins/in. CONDENSER FAN Nominal Cfm Maximum Rpm Blower Size (in.) Pulley Pitch Diameter (in.) Blower Motor (Variable) Motor Hp Motor Rpm EVAPORATOR COIL Size (L x H) (in.) Number of Rows...Fins/in. EVAPORATOR AIR FAN (Standard) Nominal Cfm Max Rpm Blower Size (in.) Motor Hp (Rpm) EVAPORATOR AIR FAN (Optional) Nominal Cfm Max Rpm Blower Size (in.) Motor Hp Motor Rpm Pulley Pitch Diameter (in.) Blower Motor (Variable) INDOOR-AIR FILTERS Number...Size (in.) INTERCONNECTING TUBING SIZE (in.)†† Hot Gas Liquid HPS LPS 024 560 036 590 450, 193/256 480, 206/274 048 690 060 700 580, 250/330 590, 254/336 7.4 7.6 (1)...SR48 70 (1)...ZR57 54 R-22 5.4 5.5 Scroll (1)...ZR23 24 (1)...ZR34 42 426 ± 7 320 ± 20 27 ± 4 67 ± 7 3/4...FPT Copper Tubes — Aluminum Fins 40 x 16 40 x 22 4...17 4...13.6 Centrifugal — Belt Drive 1350 2250 1500 12 x 9 40 x 15 4...13.6 Centrifugal — Direct Drive 1350 1100 12 x 6 None None 1/2 825 5.0 6.0 2.4-3.4 1.9-2.9 3/4 1 1725 1725 Copper Tubes — Aluminum Fins 34 x 16 4...15 Centrifugal — Direct Drive 1200 1600 1150 10 x 6 1/2 (1075) 34 x 15 4...14.4 800 1100 10 x 5 1/6 (850) LEGEND — High-Pressure Switch — Low-Pressure Switch *Shipping weights include base unit plus packaging. †If components are to be split, additional refrigerant will be needed. **Two-speed motor. ††Use Type L copper only. 2450 6.0 2.4-3.4 11/2 1725 34 x 22 4...14.4 2000 900/1050** 10 x 6 3/4 (1050) Centrifugal Belt Drive 1600 2000 1300 10 x 8 11/2 1725 Not Available 4.2 2.4-3.4 Factory-Supplied Cleanable Type 1...14 x 34 x 1 1...21 x 34 x 1 1/2 3/8 1/2 3/8 1/2 3/8 1/2 3/8 NOTE: If components are to be split, the maximum length of refrigerant tubing to be used is 50 equivalent ft, assuming components will be installed in same horizontal plane. If components are not to be installed in same horizontal plane, contact your Carrier representative for more information. For additional piping information, refer to Carrier System Design Manual, Part 3. NOTE: Fasten threaded rods through holes in end frames. Use 2 rods on each side of unit for a total of 4. All panels must be in place when rigging. OPERATING WEIGHT DISTRIBUTION AND CENTER OF GRAVITY UNIT 50AH 024 036 048 060 1 93/42 95/43 112/51 114/52 WEIGHT (lb/kg) OF CORNER 2 3 108/49 139/63 113/51 148/67 143/65 183/83 143/65 186/84 4 120/54 124/56 142/64 147/67 DIMENSIONS (ft-in./mm) A B 2-5 /737 2-15/8/651 2-43/4/730 2-2 /660 2-5 /737 2-3 /686 2-43/4/730 2-23/4/679 3 Field-installed accessories Thermostat and subbase — Attractive wall-mounted 24-v accessory provides precise temperature control. Automatic and Manual changeover models available. A thermostat subbase is available that works with CycleLOC™ circuitry. If a safety device trips, compressor locks out and subbase warning light (LK OUT) alerts occupant. Three models available: One stage cool/two stage heat; two stage cool/two stage heat; one stage cool/one stage heat. Time Guard® II circuit (standard on single-phase units) — Time Guard II device prevents short cycling of compressor if thermostat is rapidly changed; automatically prevents compressor from restarting for 5 minutes after shutdown. Electric heaters — A wide range of models is available from 5 to 30 kW, 208-, 240- and 480-v, single- and 3-ph units. The heaters mount easily on 50AH discharge opening. The heater control box is accessible from the bottom of heater. 88EN ELECTRIC HEAT MODULE ACCESSORY DIMENSIONS (in.) UNIT 50AH A 024,036 131/2 048,060 4 24 B C D DUCT OPENING 16 21/2 81/2 71/8 x 14 213/4 3 19 71/8 x 207/8 Condensate pump — The condensate pump is used when the distance and slope to the nearest drain is far enough to prevent the natural drainage of unit. The pump is mounted remotely from the unit and includes a signal light (field-installed) which illuminates when the reservoir rises beyond a certain level. The unit automatically shuts down when this reservoir level is achieved. Head pressure control damper — This accessory is duct mounted and allows unit to mechanically cool down to 0° F. Damper dimensions fit 024, 036 sizes. NOTE: For use with 048 and 060 size units, ductwork from unit to damper must be reduced in size to fit damper dimensions. Vibration isolators — Package of four isolators used for dampening any unit vibration so that vibrating sounds are not transmitted to building structure. Isolators are spring, ceiling type. HEAD PRESSURE CONTROL DAMPER (in.) Base unit dimensions DIMENSIONS (ft-in.) UNIT 50AH 024 036 048 060 A B 2-5 2-43/4 2-5 2-43/4 2-15/8 2-2 2-3 2-23/4 C 1- 53/4 1- 53/4 1-115/8 1-115/8 D E 1-2 1-2 1-87/8 1-87/8 1-1 1-1 1-77/8 1-77/8 UNIT COMPONENT LOCATIONS 5 Selection procedure (with example) I Determine cooling requirements at design conditions. Given: Gross Cooling Capacity Required (TC) . . . . . . . . . . . . . . . . . .39,000 Btuh Sensible Heat Capacity (SHC) . . . . . .30,500 Btuh Temperature of Air Entering Condenser . . . . .95 F Temperature of Air Entering Evaporator . . . . . . . . . . . . . . . 80 F edb/67 F ewb Evaporator Air Quantity. . . . . . . . . . . . 1,200 cfm External Static Pressure: Condenser . . . . . . . . . . . . . . . . . . .0.50 in. wg Evaporator (includes static pressure drop of factory-supplied filter of 0.06 in. wg) . . . . . . . . . . . . . . .0.20 in. wg II Select unit based upon required cooling capacity. Enter cooling capacity table at temperature of air entering condenser of 95 F. The 50AH036 unit at 1200 cfm and 67 F ewb will provide a Total Capacity (TC) of 44,200 Btuh and a Sensible Heat Capacity (SHC) of 31,300 Btuh. Since the entering air is 80 F edb, an SHC correction is not required. III Determine evaporator fan performance. Enter Evaporator Fan Performance table at 1200 cfm and 50AH036 data. The external static pressure shown (0.23 in. wg) will exceed the 0.20 in. wg required. The fan motor will require 0.52 kW. IV Determine condenser fan performance and motor pulley setting requirements. Enter Condenser Fan Performance table at the selected cfm and required static pressure of 0.50 in. wg. The fan motor will require 0.73 kW and the motor pulley should be set at 2 turns open at 1350 cfm of condenser air required. NOTE: Unit 50AH024 contains a direct-drive condenser fan assembly. Performance data GROSS COOLING CAPACITIES 50AH024 Temp Air Ent Condenser (F) TC 85 SHC kW TC 95 SHC kW TC 105 SHC kW TC 115 SHC kW 50AH036 Evaporator Air Quantity — Cfm/BF 600/0.02 800/0.03 1000/0.04 Evaporator Air Ewb Temp (F) 72 67 62 72 67 62 72 67 62 27.1 25.3 23.0 27.7 26.4 24.6 27.8 26.9 25.8 13.5 17.0 20.2 14.7 19.4 23.7 15.6 21.5 25.8 1.64 1.62 1.61 1.65 1.63 1.62 1.65 1.64 1.63 26.6 24.5 20.8 27.4 25.8 22.9 28.0 26.5 25.2 13.4 16.7 19.1 14.7 19.4 22.8 16.0 21.7 25.2 1.85 1.84 1.80 1.86 1.85 1.82 1.87 1.85 1.84 25.8 22.3 18.4 27.1 24.5 21.2 27.7 25.6 23.6 13.1 15.8 17.9 14.7 18.9 21.2 16.2 21.5 23.6 2.09 2.05 1.99 2.11 2.08 2.04 2.12 2.10 2.07 24.6 19.9 16.5 26.1 22.0 19.8 26.8 23.6 22.3 12.7 14.8 16.5 14.4 17.9 19.8 16.0 20.7 22.3 2.36 2.29 2.22 2.39 2.33 2.29 2.39 2.35 2.33 See Legend on page 7. 6 Temp Air Ent Condenser (F) TC 85 SHC kW TC 95 SHC kW TC 105 SHC kW TC 115 SHC kW Evaporator Air Quantity — Cfm/BF 900/0.01 1050/0.01 1200/0.02 Evaporator Air Ewb Temp (F) 72 67 62 72 67 62 72 67 62 45.0 41.1 37.3 45.8 42.3 38.6 46.5 43.4 39.8 22.5 27.7 32.6 23.6 29.9 35.6 24.6 32.0 38.3 3.19 3.07 2.96 3.22 3.11 3.00 3.25 3.14 3.04 43.0 38.8 34.3 44.1 40.1 35.8 45.0 44.2 37.4 21.8 26.8 31.1 23.1 29.1 34.1 24.4 31.3 36.8 3.42 3.28 3.15 3.46 3.33 3.20 3.49 3.37 3.25 40.4 35.8 29.6 41.6 37.1 31.3 42.6 38.2 33.2 20.9 25.6 28.5 22.3 27.9 30.8 23.7 30.2 33.2 3.63 3.48 3.38 3.68 3.53 3.44 3.73 3.58 3.49 37.7 30.6 25.8 38.7 31.6 37.8 39.7 32.8 29.7 19.9 23.3 25.8 21.3 25.5 27.8 22.7 27.8 29.7 3.85 3.71 3.59 3.90 3.76 3.67 3.94 3.80 3.73 Performance data (cont) GROSS COOLING CAPACITIES (cont) 50AH048 50AH060 Temp Air Ent Condenser (F) TC SHC kW TC SHC kW TC SHC kW TC SHC kW 85 95 105 115 BF Ewb kW SHC TC — — — — — 1200/0.06 72 56.0 27.8 3.77 54.0 27.1 4.21 51.8 26.3 4.69 49.5 25.5 5.21 67 52.1 34.8 3.68 50.1 34.0 4.11 47.9 33.1 4.58 45.5 32.2 5.09 62 47.9 41.6 3.59 45.7 40.4 4.01 42.3 38.8 4.45 38.6 37.0 4.92 Evaporator Air Quantity Cfm/BF 1600/0.08 Evaporator Air Ewb Temp (F) 57 72 67 62 57 72 44.4 57.7 54.5 50.6 49.6 59.4 44.4 30.2 39.6 48.0 49.6 32.8 3.53 3.81 3.74 3.66 3.64 3.85 42.4 55.7 52.3 48.6 47.3 57.4 42.4 29.6 38.8 47.0 47.3 32.4 3.95 4.25 4.18 4.09 4.07 4.31 40.2 53.6 50.0 45.1 45.0 54.6 40.2 29.0 38.0 44.8 45.0 31.3 4.40 4.75 4.65 4.54 4.53 4.77 37.7 51.2 47.6 41.9 42.1 52.2 37.7 28.3 27.3 41.8 42.1 30.7 4.89 5.27 5.17 5.03 5.03 5.30 Temp Air Ent Condenser (F) 2000/0.10 67 56.0 43.9 3.77 53.8 43.2 4.21 51.4 42.4 4.69 49.1 42.0 5.23 62 52.7 52.5 3.70 51.0 50.9 4.15 48.9 48.9 4.63 45.8 45.8 5.14 57 52.3 52.3 3.69 50.9 50.9 4.15 48.6 48.6 4.63 45.8 45.8 5.14 85 95 105 115 The following formulas may be used: LEGEND Bypass Factor Entering Wet-Bulb Compressor Motor Power Input (kilowatts) Gross Sensible Heat Capacity (1000 Btuh) Gross Total Cooling Capacity (1000 Btuh) tldb = tedb – tlwb = NOTES: 1. Performance based on nominal condenser airflow listed in physical data table on page 3. 2. SHC is based on 80 F db temperature of air entering the coil. Below 80 F db, subtract (corr factor x cfm) from SHC. Above 80 F db, add (corr factor x cfm) to SHC. BYPASS FACTOR (BF) .025 .05 .10 .20 .30 .35 TC SHC kW TC SHC kW TC SHC kW TC SHC kW Evaporator Air Quantity — Cfm/BF 1500/0.06 2000/0.09 2250/0.10 Evaporator Air Ewb Temp (F) 72 67 62 72 67 62 72 67 62 64.8 58.5 52.9 68.0 61.5 56.3 68.9 62.5 58.0 33.2 41.1 48.5 37.2 47.3 55.7 38.9 50.0 57.7 4.49 4.29 4.13 4.59 4.83 4.22 4.62 4.41 4.27 61.9 55.7 50.2 65.1 58.7 54.0 66.1 59.7 55.8 32.3 40.1 47.3 36.4 46.5 54.0 38.2 49.3 55.8 4.94 4.72 4.57 5.04 4.81 4.67 5.07 4.84 4.72 58.5 52.4 47.2 61.5 55.2 51.4 62.6 56.3 53.3 31.1 38.8 45.8 35.2 45.2 51.4 37.1 48.1 58.2 5.41 5.20 5.04 5.51 5.28 5.16 5.55 5.32 5.22 54.9 49.0 44.1 57.8 51.7 48.7 58.7 52.6 50.4 29.8 37.5 44.0 34.0 43.9 48.7 35.9 46.7 50.4 5.93 5.72 5.56 6.04 5.80 5.70 6.07 5.83 5.75 sensible capacity (Btuh) 1.10 x cfm Wet-bulb temperature corresponding to enthalpy of air leaving evaporator col (hlwb). hlwb = hewb – total capacity (Btuh) 4.5 x cfm Where: hewb = Enthalpy of air entering evaporator coil ENTERING AIR DRY-BULB TEMPERATURE (F) 78 77 76 75 Under 75 82 83 84 85 Over 85 Correction Factor 1.07 2.12 3.19 4.25 5.32 1.04 2.07 3.11 4.14 5.18 .98 1.96 2.94 3.92 4.90 Use formula .87 1.74 2.62 3.49 4.36 shown below .76 1.53 2.29 3.05 3.82 .71 1.42 2.13 2.83 3.54 79 81 Correction Factor = 1.10 x (1 – BF) x db – 80) EVAPORATOR FAN PERFORMANCE UNIT SIZE — 50AH CFM 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 024 ESP .60 .54 .43 .29 .11 — — — — — — — — — — 036 Fan kW .20 .22 .24 .26 .29 — — — — — — — — — — ESP — — — .69 .57 .42 .23 — — — — — — — — 048* Fan kW — — — .44 .46 .49 .52 — — — — — — — — LEGEND ESP — External Static Pressure (in. wg) kW — Total Fan Motor Power Input (kilowatts) *Standard direct drive indoor (evaporator) fan motor (IFM). For optional belt drive IFM performance, see table on page 8. NOTES: 1. Above fan performance is based on wet coil and deducted casing losses, and clean factory-installed permanent cleanable filter. ESP — — — — — 1.10 1.01 .90 .79 .67 .54 .39 .22 .03 — 060* Fan kW — — — — — .45 .49 .51 .55 .58 .61 .64 .67 .70 — ESP — — — — — 1.11 1.045 .97 .88 .78 .67 .53 .52 .40 .28 Fan kW — — — — — .52 .55 .57 .59 .62 .64 .67 .70 .74 .78 2. Evaporator fans are direct drive (except 048, 060 special order evaporator-fan motor option). Refer to Belt Drive Evaporator Fan Performance table on page 8. 3. Interpolation is permissible, do not extrapolate. 4. For units installed with accessory electric heaters, see Electric Heater Static Pressure Drop table for additional performance losses. 7 Performance data (cont) BELT DRIVE EVAPORATOR FAN PERFORMANCE (Special Order Only, Pricing and ordering on related price pages.) UNIT SIZE — 50AH CFM 048 ESP — — — .81 .72 .63 .55 .47 .42 .34 1800 1850 1900 1950 2000 2050 2100 2150 2200 2250 060 Fan kW — — — 1.03 1.05 1.07 1.08 1.11 1.14 1.17 ESP — — — — — — 1.02 .93 .84 .75 Fan kW — — — — — — 1.17 1.21 1.24 1.27 LEGEND ESP — External Static Pressure (in. wg) kW — Total Fan Power Motor Input (kilowatts) NOTE: Pulley setting must be adjusted to limit cfm to 450 cfm/ton maximum. Unit operation beyond that limit may result in blow-off and condensate problems. CONDENSER FAN PERFORMANCE UNIT 50AH 024 036 048 060 COND CFM 1525 1475 1400 1350 1300 1650 1600 1550 1500 1450 1400 1350 1300 2700 2600 2550 2450 2350 2300 2200 3100 3000 2900 2850 2750 2700 2650 2600 2550 2500 2450 2400 0.0 Turns Note 4 — — — — 2 — — 3 4 — 5 — 2 — 3 — — 4 — 3 — — 4 — — — 5 — — — — 0.1 kW .66 — — — — .84 — — .72 .63 — .51 — .90 — .81 — — .68 — 1.34 — — 1.11 — — — .95 — — — — Turns — Note 4 — — — — 2 — — 3 4 — 5 — 2 — 3 — — 4 — 3 — — 4 — — — — 5 — — kW — .64 — — — — .82 — — .70 .61 — .50 — .87 — .77 — — .66 — 1.32 — — 1.07 — — — — .92 — — EXTERNAL STATIC PRESSURE (in. wg) 0.2 0.3 0.4 Turns kW Turns kW Turns kW — — — — — — — — — — — — Note 4 .63 — — — — — — Note 4 .62 — — — — — — Note 4 .62 — — — — — — — — — — — — 2 .80 — — — — — — 2 .78 1 .84 — — — — 2 .76 3 .68 — — — — — — 3 .67 — — 4 .57 — — 3 .65 — — — — — — — — — — — — — — — — — — 2 .83 1 .89 — — — — 2 .80 1 .86 3 .74 — — — — — — — — 2 .77 — — — — — — — — — — — — — — 2 1.39 — — 3 1.24 — — — — — — — — 2 1.32 — — 3 1.17 — — — — — — — — 4 1.01 — — — — — — — — 3 1.12 — — — — — — — — 4 .97 — — 5 .90 — — — — LEGEND kW — Total Fan Motor Power Input (kilowatts) NOTES: 1. Above fan performance is based upon coil and deducted casing losses only. 2. External static pressure (ESP) is measured in inches water gage (in. wg). 3. Interpolation is permissible. Do not extrapolate. 4. Condenser fan on unit size 024 only, is direct drive. 8 0.5 Turns — — — — — — — — — 1 — 2 — — — — — — 0 1 — — — — — — — 2 — — — 3 kW — — — — — — — — — .83 — .73 — — — — — — .90 .82 — — — — — — — 1.26 — — — 1.08 0.6 Turns — — — — — — — — — — 1 — 2 — — — — — — 0 — — — — — — 1 — — — 2 — kW — — — — — — — — — — .81 — .71 — — — — — — .86 — — — — — — 1.37 — — — 1.21 — 5. Minimum one turn open of motor pulley is required on unit sizes 036 and 060. 6. Number of turns open applies to field setting of motor pulley. 7. Factory setting as follows: 036, 4 turns open; 048, 2 turns open; 060, 5 turns open. 8. Care should be taken when hoods and/or louvers are installed to avoid condenser air recirculation. ELECTRIC HEATER STATIC PRESSURE DROP (in. wg) ELECTRIC HEATER UNIT 88EN 0500CA01 0075CA01 0115CA01 0075EA01 1150EA01 0100EA01 0150EA01 0200EA01 0300EA01 0300CA01 0100FA01 0150FA01 0200FA01 0300FA01 UNIT 50AH 024, 036 1-stage heat 048, 060 2-stage heat MIN CFM 400 510 620 320 720 970 1240 1350 1220 1220 1130 1360 1350 1270 600 .02 .03 800 .04 .06 1000 .06 .10 1200 .10 .16 UNIT CFM 1400 — — 1600 — — 1800 — — 2000 — — 2200 — — .04 .08 .13 .19 — — — — — — — — .04 .06 .08 .12 .15 .17 — — — .08 .11 .14 .18 .22 .26 — — — .04 .06 .08 .12 .15 .17 — — — .08 .11 .14 .18 .22 .26 NOTE: Above electric heaters are not UL (Underwriters’ Laboratories) or CSA (Canadian Standards Association) listed for use with optional high-static evaporator-fan motor (048, 060 units only). Controls Operating sequence Cooling — Thermostat calls for cooling. Indoor (evaporator) fan relay is energized and starts evaporator fan. Compressor contactor is energized to start compressor and condenser fan (up to a 5-minute delay on single-phase units). When room thermostat is satisfied, the evaporator fan, compressor, and condenser fan shut off. Continuous fan operation — The thermostat can be set for continuous operation by setting the fan switch to ON. Electrical data UNIT 50AH V-PH (60 Hz) 024 230-1 230-1 208/230-3 460-3 230-1 208/230-3 460-3 208/230-3 460-3 230-1 208/230-3 460-3 208/230-3 460-3 036 048 048* 060 060* HACR Hp FLA LRA MOCP RLA — — — — — — VOLTAGE RANGE Min 207 207 187 414 207 187 414 187 414 207 187 414 187 414 Max 254 254 254 508 254 254 508 254 508 254 254 508 254 508 COMPRESSOR RLA 11.4 17.2 10.3 5.1 24.4 15.5 7.4 15.5 7.4 28.8 17.3 9.0 17.3 9.0 LRA 56 96 77 40 150 105 55 105 55 169 123 62 123 62 FAN MOTORS Evaporator Condenser Hp FLA Hp FLA .17 1.10 .50 3.40 .50 3.20 .75 6.06 .50 3.20 .75 3.93 .50 1.50 .75 1.97 .75 4.00 1.0 8.35 .75 4.00 1.0 3.93 .75 2.15 1.0 1.97 1.5 5.60 1.0 3.93 1.5 2.80 1.0 1.97 .75 4.00 1.5 9.50 .75 4.00 1.5 4.82 .75 2.15 1.5 2.41 1.5 5.60 1.5 4.82 1.5 2.80 1.5 2.41 POWER SUPPLY Min Ckt Amps MOCP Amps 19.0 29.5 19.9 8.9 42.9 27.3 13.4 28.9 16.3 49.5 30.4 15.8 32.0 16.0 25 40 25 15 60 35 20 35 20 60 40 20 40 20 LEGEND Heating, Air Conditioning, and Refrigeration Horsepower Full Load Amps Locked Rotor Amps Maximum Overcurrent Protection (HACR breaker) Rated Load Amps *Optional evaporator-fan motor nameplate data. 9 Electrical data (cont) ELECTRIC HEATER DATA ELECTRIC HEATER UNIT 88EN 0050CA01 0075CA01 0115CA01 0075EA01 USED WITH UNIT 50AH 024, 036 1-Stage Heat 1150EA01 0100EA01 0150EA01 0200EA01 048, 060 2-Stage Heat 0300EA01 0300CA01 0100FA01 0150FA01 0200FA01 0300FA01 V-PH (60 Hz) 240-1 240-1 240-1 208-3 240-3 208-3 240-3 208-3 240-1* 240-3 208-3 240-1* 240-3 208-3 240-1* 240-3 208-3 240-3 240-1 480-3 480-3 480-3 480-3 CAP. (kW) 5.0 7.5 11.5 5.6 7.6 11.3 15.0 7.5 10.0 10.0 11.3 15.0 15.0 15.0 20.0 20.0 22.5 30.0 30.0 10.0 15.0 20.0 30.0 Heater Amps 20.8 31.3 47.9 15.6 18.0 31.2 36.1 20.8 41.7 24.1 31.2 62.5 36.1 41.7 83.3 46.9 62.5 72.2 124.0 12.0 18.1 24.1 36.1 LEGEND MCA — Minimum Circuit Ampacity MOCP — Maximum Overcurrent Circuit Protection (Fuses or Circuit Breaker) *May be field converted to single-phase units, see electric heat installation instructions. NOTE: Separate power source is required for all heaters. Control from base unit 50AH (24 v). 10 BRANCH CIRCUIT MCA 26.0 39.1 59.9 19.5 22.6 39.0 45.1 26.0 52.1 30.1 39.0 78.1 45.1 52.1 104.2 58.6 78.2 90.2 155.0 15.0 22.6 30.1 45.1 MOCP (Amps) 30 40 60 20 25 40 50 30 60 35 40 80 50 60 110 60 80 100 175 15 25 35 50 Typical wiring schematic 50AH048,060 — 230-1-60 UNITS LEGEND AHA C CB CC EQUIP GND HPS HR IFC IFR JB L LPS NEC PL TB TC TH TRAN — — — — — — — — — — — — — — — — — — Adjustable Heat Anticipator Contactor Compressor Circuit Breaker Cooling Compensator Equipment Ground High-Pressure Switch Heater Relay Indoor (Evaporator) Fan Contactor Indoor (Evaporator) Fan Relay Junction Box Light Low-Pressure Switch National Electrical Code Plug Assembly Terminal Block Thermostat-Cooling Thermostat-Heating Transformer Marked Wire Denotes connection point between subbase and thermostat Terminal (Marked) Terminal (Unmarked) Terminal Block Field Splice Splice (Marked) Factory Splice Factory Wiring Accessory or Optional Wiring Field Control Wiring Field Power Wiring To indicate common potential only not to represent wiring 11 Typical wiring schematic (cont) 50AH036,048,060 — 208/230-3-60 UNITS LEGEND AHA C CB CC CLO CT EQUIP GND HPS HR IFC IFR JB L LOR LPS NEC PL TB TC TH TRAN 12 — — — — — — — — — — — — — — — — — — — — — Adjustable Heat Anticipator Contactor Compressor Circuit Breaker Cooling Compensator Compressor Lockout Current Transformer Equipment Ground High-Pressure Switch Heater Relay Indoor (Evaporator) Fan Contactor Indoor (Evaporator) Fan Relay Junction Box Light Lockout Relay Low-Pressure Switch National Electrical Code Plug Assembly Terminal Block Thermostat-Cooling Thermostat-Heating Transformer Marked Wire Denotes connection point between subbase and thermostat Terminal (Marked) Terminal (Unmarked) Terminal Block Field Splice Splice (Marked) Factory Splice Factory Wiring Accessory or Optional Wiring Field Control Wiring Field Power Wiring To indicate common potential only not to represent wiring Typical piping and wiring LEGEND NEC — National Electrical Code NOTES: 1. Wiring and piping shown are not intended for or to include all details for specific installation. 2. All wiring must comply with applicable local and national codes. 3. All piping must follow standard refrigerant piping techniques. Refer to Carrier System Design Manual, Part 3, for details. 4. For other installation details refer to Installation Instructions. 5. If unit sections are field split, 8 threaded support rods are required. 6. Ensure condenser air recirculation is minimized. Application data OUTDOOR-AIR TEMPERATURE OPERATING LIMITS (F) UNIT 50AH Without Head Pressure Control With Head Pressure Control Minimum Maximum Minimum Maximum 024 35 126 0 126 036 35 126 0 126 Field splitting instructions — If components are split, maximum length of refrigerant tubing to be used is 50 ft, assuming components are installed in same horizontal plane. Condenser may be mounted up to 12 ft above evaporator. Liquid line tubing is 3/8-in. OD copper tubing, and discharge line is 1/2-in. OD copper tubing. For additional piping information, refer to Carrier System Design Manual, Part 3. Units should always be within line of sight from each other, or separate NEC (National Electrical Code) 048 40 126 0 126 060 40 126 0 126 disconnects will be required. Junction boxes should be installed in both the evaporator and condenser sections adjacent to D-shaped grommets, to provide a location to splice the outdoor-fan motor factory wiring (no. 16 AWG [American Wire Gage], 4/64-in. thick insulation). Field wiring should be a minimum of no. 16 AWG, 4/64-in. thick insulation. Check all applicable electrical codes to ensure proper compliance. 13 Guide specifications Indoor Packaged Unit HVAC Guide Specifications — Section 15787 Size Range: 2 to 5 Tons, Nominal Carrier Model Number: 50AH Part 1 — General 1.01 SYSTEM DESCRIPTION Indoor mounted, electrically controlled packaged horizontal cooling unit utilizing a hermetic type scroll compressor. 1.02 QUALITY ASSURANCE A. Unit shall be certified in accordance with ARI Standard 210. B. Unit shall be UL listed and carry a UL label. C. Unit shall be CSA approved (except 3 ton, 3-phase units). D. Unit shall be factory run-tested to ensure proper performance prior to delivery. 1.03 DELIVERY, STORAGE, AND HANDLING A. Unit shall be shipped completely assembled and ready to operate. B. Unit shall be shipped factory charged with refrigerant R-22. C. Unit shall be stored and handled in accordance with the unit manufacturer’s instructions. Part 2 — Products 2.01 EQUIPMENT A. General: Factory assembled horizontal, single piece, air cooled, indoor, ceiling plenum mounted electric cooling unit. Contained within the unit enclosure shall be all factory wiring, piping, controls, refrigerant charge (R-22), and special features required prior to start-up. B. Unit Cabinet: 1. Constructed of galvanized steel. 2. Interior shall be insulated with 1/2-in. thick neoprene coated fiberglass. Insulation shall be bonded to interior surfaces by sprayed water reduceable adhesive. 3. Equipped with 3 same side access panels and 2 bottom hanging removable doors to facilitate ease of maintenance. Side panels allow access to the control box, refrigeration components, and condenser coil. Control box shall be hinged allowing access to the compressor and pressure switches. Bottom doors shall allow access to and easy removal of the condenser and evaporator motors and blower assemblies. 4. Equipped with two 3/4-in. threaded condensate drain connections below the evaporator coil and one 3/4-in. threaded connection for condenser coil wash down. Connections shall be factory plugged for field removal. 14 C. D. E. F. G. H. 5. Field splittable through the removal of 4 bolts and extending refrigerant piping and wiring to allow remote horizontal or vertical condenser mounting. 6. Unit shall have an integral hanging bracket requiring only 4 threaded rods (8 if unit is split) run to the top flange of the unit for hanging, eliminating need for external hanger brackets. 7. Contains junction box for power connection and opening for routing of control wiring. Fans: 1. Evaporator: a. Blower shall be of the forward-curved, centrifugal, direct-drive type or belt drive (4 and 5 tons only). b. Motor shall have permanently lubricated bearings. c. Unit sizes 048, 060 shall be available with an optional 1.5 hp fan motor. 2. Condenser: a. Blower shall be of the forward-curved, centrifugal, direct-driven type (024 only), or belt drive (036,048,060). b. Motor shall have permanently lubricated bearings. Compressor: 1. Fully hermetic scroll type. 2. Mounted on suitable spring vibration isolators. 3. Equipped with internal line break protection. Coils: Evaporator and condenser coils shall be of nonferrous construction with aluminum fins mechanically bonded to seamless copper tubes with all joints brazed. Refrigerant Components: Refrigerant components shall include: 1. Capillary tube feed system. 2. Refrigerant filter-drier. Filter Section: Filter section shall consist of factory-installed, permanent, cleanable air filter, removable from the same side as the access panels without the use of tools. Controls and Safeties: Control system shall include a high-pressure switch, a low-pressure switch, and a compressor lockout feature which upon tripping of any safety device shall prevent compressor from restarting until reset at the thermostat (on all 3-phase units and 036 single-phase units only). Time Guard® II device (single-phase only) shall prevent the compressor from restarting for a minimum of 5 minutes after shutdown. I. Operating characteristics: 1. Unit shall operate using refrigerant R-22. 2. Unit shall be designed for indoor suspended horizontal mounting and operation. J. Electrical Requirements Unit shall have single point power connection to leads in terminal box. K. Special Features: Certain standard features are not applicable when the features designated by * are specified. For assistance in amending the specifications, your local Carrier Sales Office should be contacted. * 1. Electric Heat Module: a. Provides encased heater elements that shall attach directly to the base unit discharge. b. Shall have bottom access. c. UL listed. 2. Thermostat Assembly: Provides cooling and fan control. Standard subbase shall include ‘‘Compressor malfunction light’’ designed to illuminate if compressor lockout is activated. 3. Time Guard® II Device Compressor Cycle Delay: Prevents compressor from restarting for a minimum of 5 minutes after shutdown. * 4. Condensate Pump: Unit shall be equipped with remotely located condensate pump. A field-installed light shall illuminate when reservoir rises above a preset level. Unit shall shut down upon reservoir light illumination. * 5. Head Pressure Control Package: Allows unit to mechanically cool down to 0° F ambient temperature. Package shall include damper operating device and all necessary hardware. 6. Vibration Isolation Package: Shall provide 4 spring hangers for ceiling mounted unit to damper vibration that may be transmitted to building structure. 15 Carrier Corporation • Syracuse, New York 13221 204 9-02 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 New Book 1 Pg 16 Catalog No. 525-00039 Printed in U.S.A. PC 111 Form 50AH-6PD Replaces: 50AH-5PD Tab IP1a Tab 2b 7a
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : Yes Create Date : 2002:09:10 12:36:50 Producer : Acrobat Distiller 4.0 for Windows Author : Carrier Corporation Creator : ADOBEPS4.DRV Version 4.20 Title : 50ah-6pd.fm Modify Date : 2004:02:23 12:40:57-05:00 Page Count : 16 Page Mode : UseOutlinesEXIF Metadata provided by EXIF.tools