Carrier 48ZG Manuel D’Utilisation
4
Table 1A — Physical Data (48ZG,ZN030-050) (cont)
LEGEND
*460-3-60 only
.
BASE UNIT
48ZG,ZN040
48ZG,ZN050
NOMINAL CAPACITY (tons)
40
50
OPERATING WEIGHT (lb)
Standard Chassis
Extended Chassis
Standard Chassis
Extended Chassis
Base Unit
Low Heat
6540
7040
6581
7081
High Heat
6670
7170
6710
7210
With Economizer
Low Heat
6841
7341
6881
7381
High Heat
6970
7470
7010
7510
COMPRESSORS
Semi-Hermetic
Quantity...Type
2...06E
2...06E
Oil Charge (pints)
14
19, 14
Capacity Steps (%)
CV
50,100
57,100
VAV
25,50,75,100
18,37,56,63,81,100
Number of Refrigerant Circuits
2
2
REFRIGERANT
R-22
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil
40.0/40.0
41.5/39.0
Standard Evaporator with HGBP
42.0/40.0
43.5/39.0
Alternate High-Capacity Evaporator Coil
50.0/51.0
49.0/49.0
Alternate High-Capacity Evaporator with HGBP
52.0/51.0
51.0/49.0
CONDENSER COILS
3
/
8
-in. Tube Diameter
Quantity
2
2
Rows...Fins/in.
Aluminum
3...15.0
3...15.0
Copper (Optional)
3...13.7
3...13.7
Total Face Area (sq ft)
50.0
50.0
EVAPORATOR COILS
Quantity
2
Total Face Area (sq ft)
45.5
Refrigerant Feed Device...No. per Circuit
TXV...2
Standard Evaporator Coils
1
/
2
in. Tube Dia
1
/
2
in. Tube Dia
Rows...Fins/in.
3...15.0
4...15.0
Fin Type
Double Wavy
Double Wavy
Tube Type
Cross Hatched
Cross Hatched
Alternate, High-Capacity Evaporator Coils
1
/
2
in. Tube Dia
1
/
2
in. Tube Dia
Rows...Fins/in.
6...16.0
6...16.0
Fin Type
Double Wavy
Double Wavy
Tube Type
Cross Hatched
Cross Hatched
HEATING SECTION
Low Heat
High Heat
Low Heat
High Heat
Number of Heat Exchangers
1
2
1
2
Input (MBtuh)
325
650
325
650
Output (MBtuh)
263
527
263
527
Temperature Rise Range (F)
10-40
25-55
10-40
25-55
Efficiency (%)
81
81
81
81
Burner Orifice Diameter
Quantity (in. ...drill no.)
7 (.1285...30)
14 (.1285...30)
7 (.1285...30)
14 (.1285...30)
Manifold Pressure (in. wg)
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
Firing Stages
2
2
2
2
Number of Gas Valves
1
2
1
2
CONDENSER FANS
Propeller Type
Quantity...Diameter (in.)
3...30
3...30
Nominal Cfm
26,000
26,000
Motor Hp...Rpm
1.0...1140
1.0...1140
SUPPLY FAN
Centrifugal 25 x 25 in.
Nominal Cfm
14,000
14,000
Maximum Allowable Cfm
20,000
20,000
Maximum Allowable Rpm
900
900
Shaft Diameter at Pulley (in.)
1
11
/
16
1
11
/
16
SUPPLY-FAN MOTOR AND DRIVE
(Any motor available on any unit)
Motor Hp
7.5
10
15
20
25
30*
Motor Frame Size
213T
215T
254T
256T
284T
286T
Efficiency at Full Load (%)
High Efficiency
88.5
89.5
91.0
91.0
91.7
92.4
Premium Efficiency
91.7
91.7
93.0 93.6
93.6
93.6
Fan Pulley Pitch Diameter (in.)
13.7
13.7
13.7
13.7
13.7
12.5
Motor Pulley Pitch Diameter (in.)
3.4
4.3
4.9
5.5
6.5
6.5
Resulting Fan Speed (rpm)
438
549
626
703
830 910
Belts Quantity...Type
2...BX60
2...5VX630
2...5VX630
2...5VX630
2...5VX650
3...5VX630
Center Distance Range (in.)
17.74-14.30
17.74-14.30
17.63-14.01
17.63-14.01
16.63-12.87
16.63-12.87
OPTIONAL POWER EXHAUST
Centrifugal, 18 x 15 in. (Any motor available on any unit)
Quantity...Motor Hp
2...3.0
2...5.0
2...7.5
2...10
Motor Frame Size
High Eff
56HZ
184T
213T
215T
Prem Eff
182T
184T
213T
215T
Efficiency at Full Load (%) High/Premium
81.0/88.5
87.5/89.5
88.5/91.7
89.5/91.7
Fan Pulley Pitch Diameter (in.)
High Eff
11
10.4
12
12
Prem Eff
11.0
10.4
12
12
Motor Pulley Pitch Diameter Range (in.)
High Eff
4.1-3.1
4.7-3.7
6.0-4.8
7.0-5.8
Prem Eff
4.1-3.1
4.7-3.7
6.0-4.8
7.0-5.8
Motor Pulley Pitch Diameter Factory Setup (in.)
4.1
4.2
5.4
6.4
Blower Shaft Diameter at Pulley (in.)
1
7
/
16
1
7
/
16
1
7
/
16
1
7
/
16
Fan Rpm Range
500-656
621-785
717-882
854-1000
Factory Setup Fan Rpm
656
703
800
927
Maximum Allowable Rpm
1000
1000
1000
1000
Belts Quantity...No.
High Eff
1...BX71
1...BX71
1...BX77
1...BX79
Prem Eff
1...BX71
1...BX71
1...BX77
1...BX79
Center Distance Range (in.)
23.62-26.50
23.62-26.50
23.62-26.50
23.62-26.50
FILTERS
Standard Efficiency Throwaway (Standard)
8...20 x 25 x 2
8...20 x 25 x 2
Quantity...Size (in.)
8...20 x 20 x 2
8...20 x 20 x 2
Medium Efficiency (30%) Pleated (Optional)
8...20 x 25 x 2
8...20 x 25 x 2
Quantity...Size (in.)
8...20 x 20 x 2
8...20 x 20 x 2
High Efficiency (90%) Bag Filters
with High Velocity Prefilters (Optional)
Quantity...Size (in.)
Quantity...Size (in.)
Bag Filter
6...20 x 24 x 22
6...20 x 20 x 22
6...20 x 20 x 22
6...20 x 24 x 22
6...20 x 20 x 22
6...20 x 20 x 22
Prefilter
12...16 x 20 x 2
3...20 x 24 x 2
12...16 x 20 x 2
3...20 x 24 x 2
OUTSIDE AIR SCREENS
Standard Hood (25%) Quantity...Size (in.)
None
None
OPTIONAL ECONOMIZER FILTER
Aluminum Frame, Permanent
Quantity...Size (in.)
5...20 x 20 x 2
2...20 x 25 x 1
2...20 x 25 x 1
5...20 x 20 x 1
2...20 x 25 x 1
2...20 x 25 x 1
CV
— Constant Volume
HGBP
— Hot Gas Bypass
MBtuh
— Btuh in Thousands
TXV
— Thermostatic Expansion Valve
VAV
— Variable Air Volume