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BASE UNIT 551C
NOMINAL CAPACITY (nominal tons)
OPERATING WEIGHT (lb)
Unit
Perfect Humidity™ Adaptive Dehumidification System
EconoMi$er IV
Roof Curb
COMPRESSOR
Quantity
Oil (oz)
REFRIGERANT TYPE
Expansion Device
Operating Charge (lb-oz)
Standard Unit
Unit With Perfect Humidity Adaptive Dehumidification System
CONDENSER FAN
Quantity...Diameter (in.)
Nominal Cfm
Motor Hp...Rpm
Watts Input (Total)
CONDENSER COIL
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR COIL
Standard Unit
Rows...Fins/in.
Total Face Area (sq ft)
Unit with Perfect Humidity Adaptive Dehumidification System
Rows...Fins/in.
Total Face Area (sq ft)
EVAPORATOR FAN
Quantity...Size (in.)
Nominal Cfm
Maximum Continuous Bhp
Motor Frame Size
Motor Rpm
Fan Rpm Range
Motor Bearing Type
Maximum Fan Rpm
Motor Pulley Pitch Diameter A/B (in.)
Motor Pulley Pitch Diameter A/B (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Belt — Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Movable Pulley Maximum Full
Movable Pulley Maximum Full
Turns from Closed Position
Factory Setting — Full Turns Open
Factory Speed Setting (rpm)
Fan Shaft Diameter at Pulley (in.)
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief
Cutout
Reset (Auto.)
LOSS-OF-CHARGE/LOW-PRESSURE
SWITCH (Liquid LIne) (psig)
Cutout
Reset (Auto.)
FREEZE PROTECTION THERMOSTAT
Opens (F)
Closes (F)
OUTDOOR-AIR INLET SCREENS
RETURN-AIR FILTERS
Quantity...Size (in.)
LEGEND
Bhp — Brake Horsepower
*Single phase/three phase.
Table 2—Physical Data 551C
024
036
2
3
435
445
13
15
50
50
115
115
1
1
25
42
5 ---3
7 ---11
10 ---2
14 ---0
1...22
1...22
3000
3500
1
1
/8...825
/8...825
180
180
3/8 ---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins
1...17
1...17
14.6
14.6
3/8 ---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins
2...15
2...15
4.2
5.5
1...17
1...17
3.5
3.9
1...10 x 10
1...10 x 10
800
1200
Std
0.58
1.20
Hi-Static
2.40
Std
48
48
Hi-Static
56
1620
1620
Std
400-1000
680-1044
Hi-Static
1075-1455
Ball
Ball
1620
2100
Std
2.4/3.2
1.9/2.9
Hi-Static
2.8/3.8
Std
5
1/
/
8
Hi-Static
7
5
/
8
Std
4.0
4.5
Hi-Static
4.5
4.5
Std
1...A...36
1...A...36
Hi-Static
1...A...39
10.0 ---12.4
10.0-12.4
Std
60
65
Hi-Static
65
Std
5
5
Hi-Static
6
Std
3
3
Hi-Static
1
3
Std
756
826
Hi-Static
1233
5
5
/
8
Cleanable. Screen quantity and size varies with option selected.
***These units do NOT meet the California low NOx requirements.
†††California SCAQMD compliant low NO
controlled to 40 nanograms per joule or less.
10
048
4
465
23
50
115
Scroll
1
56
R-22
Acutrol™ Metering Device
8 ---8
14 ---13
Propeller
1...22
3500
1
/8...825
180
2...17
16.5
2...15
5.5
2...17
3.9
Centrifugal Type, Belt Drive
1...10 x 10
1600
1.20
2.40
48
56
1620
770-1185
1075-1455
Ball
2100
1.9/2.0
2.8/3.8
1
/
2
2
5
/
/
8
8
4.0
4.0
1...A...36
1...A...39
10.0-12.4
70
65
5
6
3
1
/
3
/
2
2
936
1233
5
/
/
8
8
450 ± 50
428
320
7 ± 3
22 ± 5
30
45
Throwaway
2...16 x 25 x 2
models have combustion products that are
x
060
5
635
25
50
115
1
53
12 ---11
21 ---0
1...22
4100
1
/
...1100
4
320
2...17
16.5
4...15
5.5
2...17
3.9
1...10 x 10
2000
1.30/2.40*
2.90
48/56*
56
1725
1035-1460
1300-1685
Ball
2100
2.4/3.4
3.4/4.4
5
/
8
5
/
8
4.0
4.5
1....4...40
1...A...40
14.7-15.5
75
60
6
5
3
1
3
/
2
1248
1396
5
/
8
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