Carrier 48ZT Specifications Page 6
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Table 1A — Physical Data (48ZA,ZE,ZJ) (cont)
LEGEND
BASE UNIT 48ZA,ZE,ZJ 055 060 070
NOMINAL CAPACITY (tons) 55 60 70
OPERATING WEIGHT (lb) Standard Chassis Extended Chassis Standard Chassis Extended Chassis Standard Chassis
Base Unit
Low Heat 8700 9248 9000 9,540 9,420
High Heat 8820 9368 9120 9,668 9,550
With Economizer
Low Heat 9230 9730 9530 10,030 9,950
High Heat 9350 9850 9650 10,450 10,080
COMPRESSORS Semi-Hermetic
Quantity...Type 2...06E 2...06E 2...06E
Capacity Steps (%) 25, 40, 60, 80, 100 17, 33, 50, 66, 83, 100 14, 28, 43, 71, 85, 100
Number of Refrigerant Circuits 222
REFRIGERANT
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil 59.0/44.5 61.0/61.0 70.5/64.5
Standard Evaporator with HGBP 62.0/44.5 64.0/61.0 73.5/64.5
Alternate High Capacity Evaporator Coil 72.0/58.0 69.5/69.5 82.5/74.5
Alternate High Capacity Evaporator
with HGBP
75.0/58.0 72.5/69.5 85.5/74.5
CONDENSER COILS
3
/
8
-in. Tube Diameter
Quantity 444
Rows...Fins/in.
Aluminum 2...17.0, 3...17.0 3...17.0 3...17.0
Copper (Optional) 2...15.7, 3...15.7 3...15.7 3...15.7
Total Face Area (sq ft) 72.4 72.4 108.4
EVAPORATOR COILS
Quantity 2
Total Face Area (sq ft) 61.5
Refrigerant Feed Device...No. per Circuit TXV...2
Standard Evaporator Coils
1
/
2
in. Tube Dia
Rows...Fins/in. 3...17.0 4...17.0 4...17.0
Fin Type Double Wavy Double Wavy Double Wavy
Tube Type Smooth Smooth Smooth
Alternate, High Capacity Evaporator Coils
1
/
2
in. Tube Dia
Rows...Fins/in. 6...16 6...16 6...16
Fin Type Double Wavy Double Wavy Double Wavy
Tube Type Cross Hatched Cross Hatched Cross Hatched
HEATING SECTION Low Heat High Heat Low Heat High Heat Low Heat High Heat
Number of Heat Exchangers 14 21 14 21 14 21
Input (MBtuh) 650 975 650 975 650 975
Output (MBtuh) 526 790 526 790 526 790
Temperature Rise Range (F) 10-40 20-50 10-40 20-50 10-40 20-50
Efficiency (%) 81 81 81 81 81 81
Burner Orifice Diameter
Quantity (in. ...drill no.) 14 (.1285...30) 21 (.1285...30) 14 (.1285...30) 21 (.1285...30) 14 (.1285...30) 21 (.1285...30)
Manifold Pressure (in. wg) 3.3 3.3 3.3 3.3 3.3 3.3
Line Pressure (in. wg) (min...max) 5.0...13.0 5.0...13.0 5.0...13.0 5.0...13.0 5.0...13.0 5.0...13.0
Firing Stages 222222
Number of Gas Valves 232323
CONDENSER FANS Propeller Type
Quantity...Diameter (in.) 4...30 4...30 5...30
Nominal Cfm 40,000 40,000 50,000
Motor Hp...Rpm 1.0...1140 1.0...1140 1.0...1140
SUPPLY FAN Centrifugal 30 x 27 in.
Nominal Cfm 17,500 21,000 24,500
Maximum Allowable Cfm 25,000 30,000 30,000
Maximum Allowable Rpm 750 750 750
Shaft Diameter at Pulley (in.) 1
11
/
16
1
11
/
16
1
11
/
16
SUPPLY-FAN MOTOR AND DRIVE (Any motor available on any unit)
Motor Hp 15 20 25 30 40
Motor Frame Size 254T 256T 284T 286T S324T
Efficiency at Full Load (%)
High Efficiency 91.0 91.0 91.7 92.4 93.0
Premium Efficiency 93.0 93.6 93.6 93.6 94.5
Fan Pulley Pitch Diameter (in.) 13.7 13.7 13.7 15.5 16.1
Motor Pulley Pitch Diameter (in.) 4.5 5.1 5.5 5.9 6.7
Resulting Fan Speed (rpm) 575 651 703 711 740
Belts Quantity...Type 2...5VX1230 2...5VX1230 2...5VX1230 2...5VX1230 3...5VX1250
Center Distance Range (in.) 48.25-44.00 48.25-44.00 48.50-44.25 48.50-44.25 48.25-44.00
OPTIONAL POWER EXHAUST Centrifugal, 15 x 15 in. (Any motor available on any unit)
Quantity...Motor Hp 2...5 2...7.5 2...10
Motor Frame Size High/Premium 184T 213T 215T
Efficiency at Full Load (%) High/Premium 87.5/89.5 88.5/91.7 89.5/91.7
Resulting Fan Rpm High/Premium 740 820 920
Maximum Allowable Rpm 925 925 925
FILTERS
Standard Efficiency Throwaway (Standard)
15...20 x 25 x 2 15...20 x 25 x 2 15...20 x 25 x 2
Quantity...Size (in.) 5...16 x 20 x 2 5...16 x 20 x 2 5...16 x 20 x 2
Medium Efficiency (30%) Pleated (Optional) 15...20 x 25 x 2 15...20 x 25 x 2 15...20 x 25 x 2
Quantity...Size (in.) 5...16 x 20 x 2 5...16 x 20 x 2 5...16 x 20 x 2
High Efficiency (90%) Bag Filters
with High Velocity Prefilters (Optional) 6...20 x 24 x 2 6...20 x 24 x 2 6...20 x 24 x 2
Quantity...Size (in.) 6...24 x 24 x 2 6...24 x 24 x 2 6...24 x 24 x 2
OUTSIDE AIR SCREENS
Standard Hood (25%) Quantity...Size 2...15.5 x 69.6 2...15.5 x 69.6 2...15.5 x 69.6
Optional Economizer Quantity...Size 12...16 x 25 x 1
2...16 x 20 x 1
12...16 x 25 x 1
2...16 x 20 x 1
12...16 x 25 x 1
2...16 x 20 x 1
HGBP — Hot Gas Bypass
MBtuh — Btuh in Thousands
TXV — Thermostatic Expansion Valve
- Installation, Start-Up and 1
- Service Instructions 1
- *Includes hood 12
- Drain Piping Details 34
- 48ZA,ZC,ZE,ZJ,ZL,ZR075-105 35
- 48ZT,ZV,ZW075-105 35
- 040-105 UNITS 35
- 030 AND 035 UNITS 35
- AIR HOOD 36
- PE VFD — 38
- Field Wire Routing 39
- Field Electrical Connections 39
- Air Pressure Tubing — 54
- ZL,ZR Units) — 56
- Fig. 55 — Shipping Brackets; 57
- Size 055-070 Units 57
- Compressor Mounting 58
- Install Accessories — 58
- COMPRESSOR MOUNTING FOOT 60
- COMPRESSOR MOUNTING RAIL 60
- COIL 62
- HEADER END 62
- CONTROLS INSTALLATION 63
- Constant Volume Units — 63
- Variable Air Volume Units — 63
- PIC Control Wiring — 66
- (Fig. 84) 67
- LEGEND 68
- Terminal Block 68
- Factory Wiring 68
- Field Wiring 68
- Fig. 75 — Remote Start 69
- Fig. 77 — Smoke Control 69
- CGCDXSEN003A00 70
- TRANSDUCER ACCESSORY 71
- Only) — 72
- Smoke Control Modes — 73
- 030-050 UNITS 75
- 055-105 UNITS 75
- ALL UNITS 77
- Gas Piping — 79
- PRE-START-UP 82
- System Check 82
- (Size 030-050 Units) 94
- (Size 055-070 Units) 94
- (Size 075-105 Units) 94
- COMPONENT LOCATION 96
- Economizer Hood 96
- Operating Sequences — 97
- SPEED CTRL 101
- RUN MODE 101
- ComfortLink 103
- HEAT EXCHANGER 105
- HOLDDOWN BOLTS 106
- DECREASE 108
- NULL DECREASE 108
- SET POINT 108
- Cleaning — 109
- Lubrication 109
- CHARGING CHART 112
- IGC Troubleshooting — 122
- Unit Wiring — 122
- LEGEND FOR FIG. 141-145 126
- Ta b 1 a 134
- START-UP CHECKLIST 135
- PRE-START-UP: 135
- START-UP 136
- ELECTRICAL 136
- TEMPERATURES 136
- PRESSURES 136
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