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Table 1C — Physical Data (48ZG,ZN075-105)
BASE UNIT
48ZG,ZN075
48ZG,ZN090
48ZG,ZN105
NOMINAL CAPACITY (tons)
75
90
105
OPERATING WEIGHT (lb)
Base Unit without Economizer
Low Heat/High Heat
10,270/10,445
10,480/10,655
11,210/11,385
With Economizer
Low Heat/High Heat
10,800/10,975
11,010/11,185
11,740/11,915
COMPRESSOR
Semi-Hermetic
Number
2
2
4
Circuit (No. Cyl)
A (6)
B (6)
A (6)
B (6)
A1 (6), A2 (4)
B1 (6), B2 (4)
Model 06E
-275
-299
-299
-299
-275, -250
-275, -250
Oil Charge (pints)
19
19
19
19
19, 14
19, 14
Capacity Steps (%)
CV
43,100
50,100
50,100
VAV
14,29,43,51,66,86,100
17,33,50,67,83,100
20,30,40,50,60,60,70,80,80,90,100
Number of Refrigerant Circuits
2
2
2
REFRIGERANT
R-22
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil
70.5/64.5
64.0/64.0
68.0/68.0
Standard Evaporator with HGBP
73.5/64.5
67.0/64.0
71.0/68.0
Alternate High-Capacity Evaporator Coil
83.0/75.0
76.0/76.0
79.5/79.5
Alternate High-Capacity Evaporator with HGBP
86.0/75.0
79.0/76.0
82.5/79.5
CONDENSER COILS
3
/
8
-in. Tube Diameter
Quantity
4
4
4
Rows...Fins/in.
Aluminum
3...17.0
3...17.0
3...17.0
Copper (Optional)
3...15.7
3...15.7
3...15.7
Fin Type
Double Wavy
Lanced, Sine-wave
Lanced, Sine-wave
Tube Type
Smooth
Cross-Hatched
Cross-Hatched
Total Face Area (sq ft)
108.4
108.4
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
3
/
8
in. Tube Dia
3
/
8
in. Tube Dia
Rows...Fins/in.
4...17.0
4...17.0
4...17.0
Fin Type
Double Wavy
Lanced, Sine Wave
Lanced, Sine Wave
Tube Type
Smooth
Cross Hatched
Cross Hatched
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
2
3
2
3
2
3
Input (MBtuh)
650
975
650
975
650
975
Output (MBtuh)
527
790
527
790
527
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
Number of Gas Valves
2
3
2
3
2
3
CONDENSER FAN
Propeller Type
Quantity...Diameter (in.)
5...30
6...30
6...30
Nominal Cfm
50,000
60,000
60,000
Motor Hp (ea)...rpm
1.0...1140
1.0...1140
1.0...1140
STANDARD SUPPLY FAN
Forward Curved Centrifugal 36 x 30 in.
Nominal Cfm
24,500
29,750
35,000
Maximum Allowable Cfm
30,000
34,000
40,000
Maximum Allowable Rpm
670
670
670
Shaft Diameter at Pulley (in.)
1
11
/
16
1
11
/
16
1
11
/
16
STANDARD SUPPLY-FAN MOTOR AND DRIVE
(Any motor available on any unit)
Motor Hp
30
40
50
60
Motor Frame Size
S268T
S324T
S36T
S364T
Efficiency at Full Load (%)
High Efficiency
92.4
93.0
93.0
93.6
Premium Efficiency
93.6
94.5
94.5
95.4
Fan Pulley Pitch Diameter (in.)
18.5
18.5
18.5
18.5
Motor Pulley Pitch Diameter (in.)
5.3
5.7
6.5
7.1
Resulting Fan Rpm
501
539
615
672
Belts
Quantity...Type
3...5VX1320
4...5VX1320
4...5VX1320
4...5VX1320
Center Distance Range (in.)
47.88-45.01
47.64-44.76
47.42-44.52
47.42-44.52
ALTERNATE, AIRFOIL FAN
Airfoil
Nominal Airflow (cfm)
24,500
29,750
35,000
Maximum Allowable Airflow (cfm)
30,000
34,000
40,000
Maximum Allowable Wheel Speed (rpm)
1846
1846
1846
Shaft Diameter at Pulley (in.)
2
11
/
16
2
11
/
16
2
11
/
16
ALTERNATE SUPPLY-FAN MOTOR AND DRIVE
(Any motor available on any unit)
Motor Hp
30
40
50
60
75
Motor Frame Size
S268T
S324T
S36T
S364T
365T
Efficiency at Full Load (%)
High Efficiency
92.4
93.0
93.0
93.6
94.1
Premium Efficiency
93.6
94.5
94.5
95.4
95.4
Fan Pulley Pitch Diameter (in.)
9.7
10.2
8.9
8.9
10.8
Motor Pulley Pitch Diameter (in.)
7.5
8.7
8.1
8.7
11.1
Resulting Fan Rpm
1353
1493
1593
1711
1799
Belts
Quantity...Type
2...5VX1150
2...5VX1180
3...5VX1150
3...5VX1150
3...5VX1230
Center Distance Range (in.)
42.96-45.82
42.96-45.57
42.96-45.57
42.45-45.35
42.45-45.35
Summary of Contents for 48ZG
Page 15: ...15 Fig 3 Roof Curb Sizes 075 105 with High Capacity Power Exhaust...
Page 16: ...16 Fig 4 Condenser Section Roof Curb Size 055 and 060 Only...
Page 17: ...17 Fig 5 Condenser Section Roof Curb Size 070 105 Only...
Page 24: ...24 Fig 15 Base Unit Dimensional Drawing 48ZG ZN030 035 Standard Chassis...
Page 25: ...25 Fig 16 Base Unit Dimensional Drawing 48ZG ZN040 050 Standard Chassis...
Page 26: ...26 Fig 17 Base Unit Dimensional Drawing 48ZG ZN055 070 Standard Chassis...
Page 27: ...27 Fig 18 Base Unit Dimensional Drawing 48ZG ZN075 105 Standard Chassis a48 8451...
Page 28: ...28 Fig 19 Base Unit Dimensional Drawing 48ZG ZN030 035 Extended Chassis...
Page 29: ...29 Fig 20 Base Unit Dimensional Drawing 48ZG ZN040 050 Extended Chassis...
Page 30: ...30 Fig 21 Base Unit Dimensional Drawing 48ZG ZN055 060 Extended Chassis a48 8452...
Page 32: ...32 Fig 23 Base Unit Dimensional Drawing 48Z6 Z8075 105 Units with Return Exhaust Fan a48 8454...
Page 66: ...66 Fig 80 CCN Connections COMM BOARD MBB J5...
Page 67: ......