Bryant DURAPAC 551B User Manual
Page 72
72
PHYSICAL DATA — 551B036-072
LEGEND
Bhp — Brake Horsepower
*Single-phase/three-phase.
UNIT 551B
036
048
060
072
NOMINAL CAPACITY (tons)
3
4
5
6
OPERATING WEIGHT (lb)
Unit
435
445
465
520
EconoMi$er
47
47
47
47
Perfect Humidity™ Dehumidification Package
18
18
18
18
Roof Curb
115
115
115
115
COMPRESSOR
Scroll
Quantity
1
1
1
1
Oil (oz)
42
53
50
60
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Standard Unit
5- 8
8-6
10- 0
9-10
Unit With Perfect Humidity Dehumidification Package
8-13
11-2
12-13
13- 6
CONDENSER FAN
Propeller Type
Quantity...Diameter (in.)
1...22
1...22
1...22
1...22
Nominal Cfm
3500
3500
4100
4100
Motor Hp...Rpm
1
/
8
...825
1
/
8
...825
1
/
4
...1100
1
/
4
...1100
Watts Input (Total)
180
180
320
320
CONDENSER COIL
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
Standard Unit
Rows...Fins/in.
1...17
2...17
2...17
2...17
Total Face Area (sq ft)
14.6
16.5
16.5
16.5
Unit With Perfect Humidity Dehumidification Package
Rows...Fins/in.
1...17
1...17
1...17
1...17
Total Face Area (sq ft)
3.9
3.9
3.9
3.9
EVAPORATOR FAN
Centrifugal Type, Belt Drive
Quantity...Size (in.)
1...10 x 10
1...10 x 10
1...10 x 10
1...10 x 10
Nominal Cfm
1200
1600
2000
2400
Maximum Continuous Bhp
Standard
1.20
1.20
1.30/2.40*
2.40
High Static
2.40
2.40
2.90
2.90
Motor Frame
Standard
48
48
56
56
High Static
56
56
56
56
Fan Rpm Range
Standard
760-1090
840-1185
1020-1460/1120-1585*
1120-1585
High Static
1075-1455
1075-1455
1300-1685
1300-1685
Motor Bearing Type
Ball
Ball
Ball
Ball
Maximum Fan Rpm
2100
2100
2100
2100
Motor Pulley Pitch Diameter A/B (in.)
Standard
1.9/2.9
1.9/2.9
2.4/3.4
2.4/3.4
High Static
2.8/3.8
2.8/3.8
3.4/4.4
3.4/4.4
Nominal Motor Shaft Diameter (in.)
Standard
1
/
2
1
/
2
5
/
8
5
/
8
High Static
5
/
8
5
/
8
7
/
8
7
/
8
Fan Pulley Pitch Diameter (in.)
Standard
4.5
4.0
4.0
4.0
High Static
4.5
4.0
4.5
4.5
Belt — Quantity...Type...Length (in.)
Standard
1...A...33
1...A...36
1...A...40
1...A...38
High Static
1...A...39
1...A...39
1...A...40
1...A...40
Pulley Center Line Distance (in.)
10.0-12.4
10.0-12.4
14.7-15.5
14.7-15.5
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Standard
65
70
75
95
High Static
65
65
60
60
Movable Pulley Maximum Full Turns
From Closed Position
Standard
5
5
6
5
High Static
6
6
5
5
Factory Setting — Full Turns Open
Standard
3
3
3
3
High Static
3
1
/
2
3
1
/
2
3
1
/
2
3
1
/
2
Factory Speed Setting (rpm)
Standard
890
980
1240
1304
High Static
1233
1233
1396
1396
Fan Shaft Diameter at Pulley (in.)
5
/
8
5
/
8
5
/
8
5
/
8
EVAPORATOR COIL
High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Metering Device
Rows...Fins/in.
2...15
2...15
4...15
4...15
Total Face Area (sq ft)
5.5
5.5
5.5
5.5
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
450 ± 50
Cutout
428
Reset (Auto.)
320
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH (Liquid Line) (psig)
Cutout
7 ± 3
Reset (Auto.)
22 ± 5
FREEZE-PROTECTION THERMOSTAT
Opens (F)
30
Closes (F)
45
OUTDOOR-AIR INLET SCREENS
Cleanable
Quantity...Size (in.)
1...20 x 24 x 1
RETURN-AIR FILTERS
Throwaway
Quantity...Size (in.)
2...16 x 25 x 2
0
T
F
Q
0
04
-0
12
55
1B0
3
6-
15
0