installation, start-up and service instructions

SINGLE PACKAGE ROOFTOP

ELECTRIC COOLING UNITS

Cancels: II 551B-90-6

551B

Dura

Pac

Plus Series

Sizes 090-150

7

1

/

2

to 12

1

/

2

Tons

II 551B-90-7

10/15/05

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37

I. Step 1 — Provide Unit Support. . . . . . . . . . . . . . . . . 1

II. Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . 1

III. Step 3 — Install Condensate Drain Line

and External Trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

IV. Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 2

V. Step 5 — Make Electrical Connections . . . . . . . . . . 7

VI. Step 6 — Adjust Factory-Installed Options . . . . . . 11

VII. Step 7 — Adjust Evaporator-Fan Speed . . . . . . . . 21

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-41

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41-45

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .46-49

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

CAUTION: Ensure voltage listed on unit data plate agrees with electrical supply provided for unit.

WARNING: Before performing service or maintenance operations on unit, turn off main power switch to unit and install lockout tag. Electrical shock could cause personal injury.

INSTALLATION

Unit is shipped in the vertical configuration. To convert to horizontal configuration, remove side duct opening covers.

Using the same screws, install covers on vertical duct openings with the insulation-side down. Seals around duct openings must be tight. See Fig. 1.

I. STEP 1 — PROVIDE UNIT SUPPORT

A. Roof Curb

Assemble and install accessory roof curb in accordance with instructions shipped with curb. Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork

must be attached to curb. If electric or control power is to be routed through the basepan, attach the accessory thru-thebottom service connections to the basepan in accordance with the accessory installation instructions. Connections must be installed before unit is set on roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are shown in Fig. 3.

Refer to Accessory Roof Curb Installation Instructions for additional information as required.

B. Slab Mount (Horizontal Units Only)

Provide a level concrete slab that extends a minimum of 6 in.

beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

C. Alternate Unit Support (Curb or Slab Mount)

A non-combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced

4-in. x 4-in. pads on each side.

II. STEP 2 — FIELD FABRICATE DUCTWORK

On vertical discharge units, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. For horizontal applications, field-supplied flanges should be attached to horizontal discharge openings and all ductwork attached to the flanges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

A minimum clearance to combustibles is not required around ductwork on vertical discharge units. On horizontal discharge units, a minimum clearance of 1 in. is required for the first 12 in. of ductwork. Cabinet return-air static pressure (a negative condition) should not exceed 0.30 in. wg with

EconoMi$er IV, or 0.45 in. wg without economizer.

Fig. 1 — Horizontal Conversion Panels

III. STEP 3 — INSTALL CONDENSATE DRAIN LINE AND

EXTERNAL TRAP

Condensate drain connections are located at the bottom and end of the unit. Unit discharge connections do not determine the use of drain connections; either drain connection can be used in vertical or horizontal applications.

When using the standard end drain connection, make sure the plug (red) in the alternate bottom connection is tight before installing the unit.

To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug (red) from the bottom connection to the end connection. See Fig. 4. The piping for the condensate drain and external trap can be completed after the unit is in place. The center drain plug looks like a star connection, however it can be removed with a 1 /

2

-in.

socket drive extension.

All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1 in. per

10 ft of run. Do not use a pipe size smaller than the unit connection ( 3 /

4

in.). See Fig. 5.

IV. STEP 4 — RIG AND PLACE UNIT

Inspect unit for transportation damage. File any claim with transportation agency. Keep unit upright and do not drop.

Spreader bars are not required if top crating is left on unit.

Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 6 for additional information. Operating weight is shown in

Table 1 and Fig. 6.

Lifting holes are provided in base rails as shown in Fig. 6 and 7. Refer to rigging instructions on unit.

A. Positioning

Maintain clearance around and above unit to provide proper airflow and service access. See Fig. 7.

Position unit on roof curb so that the following clearances are maintained: 1 /

4

in. clearance between the roof curb and the base rail inside the front and rear, 0.0 in. clearance between the roof curb and the base rail inside on the duct end of the unit. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to Fig. 2, section C-C.

Do not install unit in an indoor location. Do not locate unit air inlet near exhaust vents or other sources of contaminated air.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

After unit is in position, remove polyethylene shipping wrapper and rigging skid.

— 2 —

CONNECTOR

PKG. ACCY.

CRBTMPWR001A01

CRBTMPWR002A01

B

CRBTMPWR003A01

2

′-8

7

/

16

[827]

″

C

1

′-10

15

/

16

[583]

″

CRBTMPWR004A01

D ALT

DRAIN HOLE

1

3

/

4

″

[44.5]

GAS

3

/

4

″

[19] NPT

1 /

2

″

[12.7] NPT

3 /

4

″

[19] NPT

POWER CONTROL

ACCESSORY

POWER

3 /

1

4

″ [19] NPT

1

/

4

″ [31.7]

3 /

4

″ [19] NPT

1

/

2

″

[12.7] NPT

1

/

2

″

[12.7] NPT

1 1 /

4

″ [31.7]

ROOF CURB

ACCESSORY

“A”

CRRFCURB003A01

1

′-2″ [356]

CRRFCURB004A01

2

′-0″ [610]

UNIT SIZE

551B090-150

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1-in. thick polyurethane foam,

1 3 /

4

lb density.

3. Dimensions in [ ] are in millimeters.

4. Roof curb: 16-gage steel.

5. Attach ductwork to curb (flanges of duct rest on curb).

6. Service clearance 4 ft on each side.

7.

Direction of airflow.

8. Connector packages CRBTMPWR001A01 and

2A01 are for thru-the-curb gas type. Packages

CRBTMPWR003A01 and 4A01 are for thru-thebottom type gas connections.

Fig. 2 — Roof Curb Details

— 3 —

MAXIMUM ALLOWABLE DIFFERENCE

(in.)

A-B

0.5

B-C

1.0

A-C

1.0

Fig. 3 — Unit Leveling Tolerances

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4-in. trap is recommended.

Fig. 5 — Condensate Drain Piping Details

HORIZONTAL

DRAIN OUTLET

DRAIN PLUG

NOTE: Drain plug is shown in factory-installed position.

Fig. 4 — Condensate Drain Location

NOTES:

1. Place unit on curb as close as possible to the duct end.

2. Dimension in ( ) is in millimeters.

3. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use wooden top skid when rigging to prevent rigging straps from damaging unit.

4. Unit weights do not include economizer. See Table 1 for economizer weights.

5. Weights include base unit without the Perfect Humidity™ dehumidification system. See Table 1 for additional unit operating weights with the Perfect Humidity dehumidification system.

CAUTION:

All panels must be in place when rigging.

551B

090

102

120

150

OPERATING

WEIGHT lb

755

kg in.

A mm

B in.

mm in.

C mm

343 77.42

1967 41.5

1054 42.12

1070

895

915

930

406

415

422

77.42

77.42

77.42

1967

1967

1967

41.5

41.5

41.5

1054

1054

1054

50.12

50.12

50.12

1273

1273

1273

Fig. 6 — Rigging Details

— 4 —

— 5 —

UNIT 551B

NOMINAL CAPACITY (tons)

OPERATING WEIGHT (lb)

Unit

EconoMi$er IV

Perfect Humidity™ Dehumidification Package

Roof Curb

COMPRESSOR

Quantity

Oil (oz) (each compressor)

REFRIGERANT TYPE

Expansion Device

Operating Charge (lb-oz)

Standard Unit

Circuit 1

Circuit 2

Unit With Perfect Humidity Dehumidification Package

Circuit 1

Circuit 2

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 Dehumidification Package

Rows...Fins/in.

Total Face Area (sq ft)

EVAPORATOR FAN

Size (in.)

Nominal Cfm — Standard

Maximum Continuous Bhp

Standard

High Static

Motor Frame

Fan Rpm Range

Standard

High Static

Motor Bearing Type

Maximum Fan Rpm

Motor Pulley Pitch Diameter A/B (in.)

Standard

High Static

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

Standard

High Static

Belt — Quantity...Type...Length (in.)

Standard

High Static

Pulley Center Line Distance (in.)

Speed Change per Full Turn of

Movable Pulley Flange (rpm)

Standard

High Static

Movable Pulley Maximum Full Turns

From Closed Position

Standard

High Static

Factory Setting — Full Turns Open

Factory Speed Setting (rpm)

Standard

High Static

Fan Shaft Diameter at Pulley (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief (Differential)

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

Table 1 — Physical Data

090

7

1

/

2

755

75

44

143

2

53

102

8

1

/

2

895

75

51

143

2

53

120

10

Scroll

R-22

Metering Device

915

75

51

143

2

50

150

12

1

/

2

930

75

51

143

2

60

7-10

8- 2

9- 8

8-13

9-6

10-9

9-8

9-5

13-0

13-6

1

2...22

/

4

6500

...1100

650

16-0

16-8

2...22

1 /

4

6500

...1100

650

Propeller Type

1 /

16-8

17-8

2...22

4

7000

...1100

650

15-3

16-6

2...22

1 /

4

7000

...1100

650

2...17

20.5

High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins

2...17

25.0

2...17

25.0

2...17

25.0

High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Face Split

3...15

8.9

2...17

6.3

4...15

11.1

2...17

8.4

15 x 15

3000

2.90

4.20

56

4...15

11.1

4...15

11.1

2...17

8.4

2...17

8.4

Centrifugal Type, Belt Drive

15 x 15

3400

15 x 15

4000

2.90

4.20

56

840-1085

860-1080

Ball

2100

3.70

5.25

56

860-1080

830-1130

Ball

2100

15 x 15

5000

5.25

—

56

840-1085

860-1080

Ball

2100

3.4/4.4

4.0/5.0

7 /

8

7.0

8.0

1...A...48

1...A...55

16.75-19.25

3.4/4.4

4.0/5.0

7 /

8

7.0

8.0

1...A...51

1...A...55

16.75-19.25

4.0/5.0

2.8/3.8

7 /

8

8.0

5.8

1...A...51

1...BX...46

15.85-17.50

830-1130

—

Ball

2100

2.8/3.8

—

7 /

8

5.8

—

1...BX...46

—

15.85-17.50

50

60

5

5

5

840

860

1

50

60

5

5

5

840

860

1

45

60

5

6

5

862

887

1

60

—

6

—

5

887

—

1

450 ± 50

428

320

7 ± 3

22 ± 5

30 ± 5

45 ± 5

Cleanable. Screen size and quantity varies by options selected.

4...16 x 20 x 2 4...16 x 20 x 2

Throwaway

4...20 x 20 x 2 4...20 x 20 x 2

— 6 —

V. STEP 5 — MAKE ELECTRICAL CONNECTIONS

WARNING: Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical

Code) ANSI (American National Standards Institute) /

NFPA (National Fire Protection Association) 70-latest year and local electrical codes. Failure to follow this warning could result in the installer being liable for personal injury of others.

A. Field Power Supply

All units except 208/230-v units are factory-wired for the voltage shown on the unit nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer

must be rewired by disconnecting the black wire from the

230-v terminal wire on the transformer and connecting it to the 200-v red terminal of the transformer. The end of the orange wire must then be insulated.

Refer to unit label diagram for additional information.

Pigtails are provided for field wire connections. Use factorysupplied splices or UL (Underwriters’ Laboratories) approved copper/aluminum connector.

When installing units, provide a disconnect per the NEC.

All field wiring must comply with the NEC and local requirements. In Canada, electrical connections must be made in accordance with CSA (Canadian Standards Association)

C22.1 Canadian Electrical Code Part One.

Install field wiring as follows:

1. Install conduit through side panel openings. For units without electric heat, install conduit between disconnect and control box.

2. Install power lines to terminal connections as shown in Fig. 8.

3. For units with electric heat, refer to Accessory Installation Instructions.

During operation, voltage to compressor terminals must be within range indicated on unit nameplate (see Table 2). On

3-phase units, voltages between phases must be balanced within 2%, and the current within 10%. Use the formula shown in Table 2, Note 2 on page 10 to determine the percentage of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Bryant warranty.

See Table 3 for electric heater and single point box usage.

551B090-120, 208/230-3-60

551B090-150, 460-3-60

551B150, 208/230-3-60

LEGEND

C

— Contactor

COMP(S) — Compressor

IFC

NEC

— Indoor (Evaporator) Fan Contactor

— National Electrical Code

OFC

TB

— Outdoor (Condenser) Fan Contactor

— Terminal Block

Terminal Block Connection

Field Wiring

Factory Wiring

Splice Connection

(Factory-Supplied)

551B090-150, 575-3-60

Fig. 8 — Power Wiring Connections

— 7 —

Table 2 — Electrical Data

UNIT

551B

090

102

NOMINAL

V-PH-Hz

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

IFM

TYPE

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

VOLTAGE

RANGE

COMP NO. 1 COMP NO. 2

CONV

OUTLET

Min Max RLA LRA RLA LRA

OFM

QTY

ELECTRIC HEATER

OFM

FLA

IFM

FLA

Nominal kW*

FLA

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

187

187

187

187

414

414

414

414

518

518

518

518

187

187

187

187

414

414

414

414

254

254

254

254

508

508

508

508

632

632

632

632

254

254

254

254

508

508

508

508

12.4

12.4

12.4

12.4

6.4

6.4

6.4

6.4

4.8

4.8

4.8

4.8

13.4

13.4

13.4

13.4

7.4

7.4

7.4

7.4

88.0

88.0

88.0

88.0

44.0

44.0

44.0

44.0

34.0

34.0

34.0

34.0

105.0

105.0

105.0

105.0

55.0

55.0

55.0

55.0

12.4

12.4

12.4

12.4

6.4

6.4

6.4

6.4

4.8

4.8

4.8

4.8

13.1

13.1

13.1

13.1

7.4

7.4

7.4

7.4

88.0

88.0

88.0

88.0

44.0

44.0

44.0

44.0

34.0

34.0

34.0

34.0

105.0

105.0

105.0

105.0

55.0

55.0

55.0

55.0

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

1.4

1.4

1.4

1.4

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

1.4

1.4

1.4

1.4

0.7

0.7

0.7

0.7

—

16.7

19.8

33.4

39.7

50.2

—

16.7

19.8

33.4

39.7

50.2

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—

16.7

19.8

33.4

39.7

50.2

—

16.7

19.8

33.4

39.7

50.2

—

16.4

32.7

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—

16.7

19.8

33.4

39.7

50.2

—

16.7

19.8

33.4

39.7

50.2

—

16.4

32.7

—

16.7

19.8

33.4

39.7

50.2

—

16.7

19.8

33.4

39.7

50.2

—

16.4

32.7

—

16.4

32.7

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

—/—

21.7/ 25.0

33.4/ 38.5

51.7/ 59.7

66.7/ 77.0

88.4/102.0

7.5

7.5

10.6

10.6

3.4

3.4

4.8

4.8

3.4

3.4

4.8

4.8

7.5

7.5

10.6

10.6

3.4

3.4

4.8

4.8

—

13.9

16.5

27.8

33.0

41.7

—

13.9

16.5

27.8

33.0

41.7

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

13.9

16.5

27.8

33.0

41.7

—

13.9

16.5

27.8

33.0

41.7

—

17.0

34.0

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

13.9

16.5

27.8

33.0

41.7

—

13.9

16.5

27.8

33.0

41.7

—

17.0

34.0

—

13.9

16.5

27.8

33.0

41.7

—

13.9

16.5

27.8

33.0

41.7

—

17.0

34.0

—

17.0

34.0

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

—

7.8/10.4

12.0/16.0

18.6/24.8

24.0/32.0

31.8/42.4

See page 10 for legend and notes.

24.2

28.5

31.8

48.7

56.6

69.6

22.9

26.9

30.8

47.8

55.6

68.7

49.3/ 49.3

49.3/ 49.5

59.9/ 66.4

82.9/ 92.8

101.6/114.5

128.7/145.8

21.5

25.1

29.1

46.0

53.9

66.9

25.6

30.3

33.5

50.5

58.3

71.4

50/50

50/50

—

—

—

—

50/50

50/50

—

—

—

—

20

20

50

45/45

45/45

60/60

—

—

—

20

35

35

60

60

—

20

20

35

50

60

—

20

20

45

20

20

45

20

20

50

17.9

27.9

45.7

40.2/ 40.2

40.2/ 40.6

51.1/ 57.5

74.0/ 84.0

92.8/105.6

119.9/136.9

46.2/ 46.2

46.2/ 46.2

56.1/ 62.5

79.0/ 89.0

97.8/110.6

124.9/141.9

43.3/ 43.3

43.3/ 44.5

54.9/ 61.4

77.9/ 87.8

96.6/109.5

123.7/140.8

20.6

26.9

30.8

47.8

55.6

68.7

23.3

30.3

33.5

50.5

58.3

71.4

14.6

23.8

44.3

16.8

26.5

44.3

15.8

25.2

45.7

19.2

25.1

29.1

46.0

53.9

66.9

21.9

28.5

31.8

48.7

56.6

69.6

41.3/ 41.3

41.3/ 44.5

54.9/ 61.4

77.9/ 87.8

96.6/109.5

123.7/140.8

47.3/ 47.3

47.3/ 49.5

59.9/ 66.4

82.9/ 92.8

101.6/114.5

128.7/145.8

POWER SUPPLY

MCA

Fuse or

HACR

Bkr

MOCP

38.2/ 38.2

38.2/ 40.6

51.1/ 57.5

74.0/ 84.0

92.8/105.6

119.9/136.9

44.2/ 44.2

44.2/ 45.6

56.1/ 62.5

79.0/ 89.0

97.8/110.6

124.9/141.9

45/45

45/45

60/60

—

—

—

50/50

50/50

—

—

—

—

DISCONNECT

FLA

SIZE†

LRA

—

—

—

40/ 40 242/242

40/ 40 242/242

47/ 53 242/242

80/ 90

100/110

68/ 77

85/ 97

242/242

242/242

125/150 110/126 242/242

—

—

60/ 70

46/ 46 247/247

46/ 46 247/247

53/ 58 247/247

80/ 90

100/125

74/ 83

91/103

247/247

247/247

125/150 116/131 247/247

45/45

50/50

—

—

—

—

50/50

60/60

—

—

—

—

20

20

20

50

60

—

20

20

35

50

60

—

—

—

60/ 70

44/ 44 267/267

44/ 44 267/267

51/ 56 267/267

80/ 90

100/110

72/ 81

89/101

267/267

267/267

125/150 114/129 267/267

—

—

70/ 70

49/ 49 271/271

49/ 49 271/271

56/ 62 271/271

90/100

110/125

77/ 86

94/106

271/271

271/271

150/150 119/135 271/271

—

—

—

—

—

70

—

—

—

—

—

70

20

23

27

42

50

62

23

26

29

45

52

64

123

123

123

123

123

123

121

121

121

121

121

121

60/60

60/60

—

—

—

—

20

20

20

50

60

—

20

20

35

50

60

—

20

20

35

50

60

—

20

35

35

60

60

—

—

—

—

—

—

70

—

—

—

—

—

80

—

—

—

—

—

—

—

—

—

—

—

—

22

25

28

44

51

63

24

27

31

46

54

66

15

22

41

17

24

43

17

23

42

19

25

44

135

136

136

136

136

136

133

134

134

134

134

134

94

95

95

96

96

96

104

104

104

106

106

106

—

—

—

42/ 42 276/276

42/ 42 276/276

47/ 53 276/276

80/ 90

100/110

68/ 77

85/ 97

276/276

276/276

110/150 110/126 276/276

—

—

60/ 70

48/ 48 281/281

48/ 48 281/281

53/ 58 281/281

80/ 90

100/125

74/ 83

91/103

281/281

281/281

125/150 116/131 281/281

—

—

60/ 70

46/ 46 301/301

46/ 46 301/301

51/ 56 301/301

80/ 90

100/110

72/ 81

89/101

301/301

301/301

125/150 114/129 301/301

—

—

70/ 70

51/ 51 305/305

51/ 51 305/305

56/ 62 305/305

90/100

110/125

77/ 86

94/106

305/305

305/305

150/150 119/135 305/305

—

—

—

—

—

70

—

—

—

—

—

70

—

—

—

—

—

70

—

—

—

—

—

80

23

23

27

42

50

62

25

26

29

45

52

64

24

25

28

44

51

63

27

27

31

46

54

66

143

143

143

143

143

143

155

156

156

156

156

156

145

145

145

145

145

145

157

158

158

158

158

158

— 8 —

Table 2 — Electrical Data (cont)

UNIT

551B

102

(cont)

120

150

NOMINAL

V-PH-Hz

575-3-60

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

IFM

TYPE

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

HIGH

STATIC

HIGH

STATIC

STD

STD

STD

STD

STD

STD

VOLTAGE

RANGE

COMP NO. 1 COMP NO. 2

CONV

OUTLET

Min Max RLA LRA RLA LRA

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

518

518

518

518

187

187

187

187

414

414

414

414

518

518

518

518

187

187

414

414

518

518

632

632

632

632

254

254

254

254

508

508

508

508

632

632

632

632

254

254

508

508

632

632

6.4

6.4

6.4

6.4

17.6

17.6

17.6

17.6

8.3

8.3

8.3

8.3

6.3

6.3

6.3

6.3

19.0

19.0

9.0

9.0

7.4

7.4

44.0

44.0

44.0

44.0

125.0

125.0

125.0

125.0

62.5

62.5

62.5

62.5

50.0

50.0

50.0

50.0

156.0

156.0

70.0

70.0

54.0

54.0

6.4

6.4

6.4

6.4

17.6

17.6

17.6

17.6

8.3

8.3

8.3

8.3

6.3

6.3

6.3

6.3

19.0

19.0

9.0

9.0

7.4

7.4

44.0

44.0

44.0

44.0

125.0

125.0

125.0

125.0

62.5

62.5

62.5

62.5

50.0

50.0

50.0

50.0

156.0

156.0

70.0

70.0

54.0

54.0

OFM

QTY

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

OFM

FLA

IFM

FLA

ELECTRIC HEATER

Nominal kW*

FLA

—

16.7

19.8

39.7

50.2

60.1

—

16.7

19.8

39.7

50.2

60.1

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

—

16.7

19.8

39.7

50.2

60.1

—

16.7

19.8

39.7

50.2

60.1

—

16.4

32.7

49.1

—

16.4

32.7

49.1

—

16.4

32.7

—

16.4

32.7

—

16.4

32.7

—

16.4

32.7

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

—

16.7

19.8

39.7

50.2

60.1

—

16.7

19.8

39.7

50.2

60.1

—

16.4

32.7

49.1

—

16.4

32.7

49.1

—

16.4

32.7

49.1

—

16.4

32.7

49.1

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

—/—

21.7/ 25.0

33.4/ 38.5

66.7/ 77.0

88.4/102.0

104.2/120.3

0.7

0.7

0.7

0.7

1.4

1.4

1.4

1.4

0.7

0.7

0.7

0.7

0.7

0.7

0.7

0.7

1.4

1.4

0.7

0.7

0.7

0.7

3.4

3.4

3.4

4.8

10.6

10.6

15.0

15.0

4.8

4.8

7.4

7.4

4.8

4.8

7.4

7.4

15.0

15.0

7.4

7.4

7.4

7.4

—

13.9

16.5

33.0

41.7

50.0

—

13.9

16.5

33.0

41.7

50.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

—

13.9

16.5

33.0

41.7

50.0

—

13.9

16.5

33.0

41.7

50.0

—

17.0

34.0

51.0

—

17.0

34.0

51.0

—

17.0

34.0

—

17.0

34.0

—

17.0

34.0

—

17.0

34.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

—

13.9

16.5

33.0

41.7

50.0

—

13.9

16.5

33.0

41.7

50.0

—

17.0

34.0

51.0

—

17.0

34.0

51.0

—

17.0

34.0

51.0

—

17.0

34.0

51.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

—

7.8/10.4

12.0/16.0

24.0/32.0

31.8/42.4

37.5/50.0

See page 10 for legend and notes.

29.1

30.1

34.1

58.9

71.9

69.4

31.8

33.5

36.8

61.6

74.6

73.4

23.7

27.8

48.3

56.5

25.9

30.5

50.9

59.1

21.2

27.8

48.3

56.5

23.4

30.5

50.9

59.1

60.6/ 60.6

60.6/ 60.6

60.4/ 66.9

102.1/115.0

129.2/146.3

149.0/139.0

66.6/ 66.6

66.6/ 66.6

65.4/ 71.9

107.1/120.0

134.2/151.3

154.0/143.0

35

40

40

—

—

—

35

35

40

60

—

—

30

35

60

—

30

30

50

—

70/70

—

—

—

—

—

70/70

—

—

—

—

—

25

35

60

—

25

25

50

—

20

35

40

60

—

—

20

35

35

60

—

—

70/70

—

—

—

—

—

20

20

35

60

—

—

25

25

50

60

25

25

50

60

35

40

40

—

—

—

27.6

30.3

33.5

58.3

71.4

70.1

27.5

30.1

34.1

58.9

71.9

69.4

63.4/ 63.4

63.4/ 63.4

65.4/ 71.9

107.1/120.0

134.2/151.3

154.0/143.0

24.9

26.9

30.8

55.6

68.7

66.1

30.2

33.5

36.8

61.6

74.6

73.4

19.1

25.2

45.7

53.9

21.3

27.9

48.3

56.5

21.5

27.9

48.3

53.0/ 53.0

53.0/ 53.0

54.9/ 61.4

96.6/109.5

123.7/140.8

143.5/133.5

59.0/ 59.0

59.0/ 59.0

59.9/ 66.4

101.6/114.5

128.7/145.8

148.5/137.5

57.4/ 57.4

57.4/ 57.4

60.4/ 66.9

102.1/115.0

129.2/146.3

149.0/139.0

POWER SUPPLY

MCA

Fuse or

HACR

Bkr

MOCP

18.2

23.8

44.3

20.4

26.5

46.9

18.2

23.8

44.3

20

20

45

25

25

50

20

20

45

—

—

—

—

—

—

—

—

—

25

25

50

60/60

60/60

—

—

—

—

70/70

—

—

—

—

—

70/70

—

—

—

—

—

DISCONNECT

FLA

SIZE†

LRA

19

22

41

21

24

43

19

22

41

—

—

—

22

25

44

126

126

126

—

—

60/ 70

56/ 56 341/341

56/ 56 341/341

56/ 56 341/341

100/110 89/101 341/341

125/150 114/129 341/341

150/150 132/151 341/341

—

70/ 70

70/ 70

61/ 61 345/345

61/ 61 345/345

61/ 62 345/345

110/125 94/106 345/345

150/150 119/135 345/345

150/150 138/156 345/345

—

70/ 70

70/ 80

61/ 61 364/364

61/ 61 364/364

61/ 62 364/364

110/125 94/106 364/364

150/150 119/135 364/364

150/175 137/156 364/364

114

115

115

116

116

116

114

115

115

—

70/ 70

80/ 80

66/ 66 369/369

66/ 66 369/369

66/ 67 369/369

110/125 99/111 369/369

150/175 124/140 369/369

175/175 143/161 369/369

—

—

—

—

80

80

—

—

—

—

80

80

—

—

—

—

70

80

—

—

—

70

80

80

—

—

—

—

—

—

—

—

26

26

28

51

63

75

29

29

31

54

66

77

29

29

31

54

66

78

32

32

34

57

69

80

22

25

44

63

20

23

42

61

170

171

171

171

171

171

136

136

136

136

138

138

138

138

184

184

184

184

184

184

182

182

182

182

182

182

172

173

173

173

173

173

—

—

—

70

80

80

—

—

—

—

80

80

—

—

—

70

—

—

—

70

—

—

—

70

—

—

—

70

25

28

46

65

23

26

44

63

145

146

146

146

147

148

148

148

—

70/ 70

70/ 80

64/ 64 426/426

64/ 64 426/426

64/ 64 426/426

110/125 94/106 426/426

150/150 119/135 426/426

150/175 137/156 426/426

—

70/ 70

80/ 80

70/ 70 431/431

70/ 70 431/431

70/ 70 431/431

110/125 99/111 431/431

150/175 124/140 431/431

175/175 143/161 431/431

31

31

31

54

66

78

33

33

34

57

69

80

25

26

44

63

27

28

46

65

199

199

199

199

199

199

197

197

197

197

197

197

153

154

154

154

155

155

155

155

— 9 —

LEGEND AND NOTES FOR TABLE 2

LEGEND

FLA

— Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM

— Indoor (Evaporator) Fan Motor

LRA

— Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP— Maximum Overcurrent Protection

NEC

— National Electrical Code

OFM — Outdoor (Condenser) Fan Motor

RLA

— Rated Load Amps

*Heater capacity (kW) is based on heater voltage of 208, 240, 480, and 575-V. If power distribution voltage varies from rated heater voltage, heater kW will vary accordingly.

†Used to determine minimum disconnect per NEC.

NOTES:

1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than

2%. Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance

= 100 x max voltage deviation from average voltage average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage =

452 + 464 + 455

3

1371

=

3

=

457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

3. Non-fused disconnect switch cannot be used when rooftop unit electrical ratings exceed 80 amps.

Table 3 — Electric Heater Usage

UNIT

551B

090

102

120

150

VOLTAGE

(60 Hz)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

ACCESORY kW

7.8/ 9.6/10.4

12.0/14.7/16.0

18.6/22.8/24.8

24.0/29.4/32.0

31.8/39.0/42.4

12.8/13.9

15.2/16.5

25.6/27.8

30.4/33.0

38.4/41.7

17.0

34.0

7.8/ 9.6/10.4

12.0/14.7/16.0

18.6/22.8/24.8

24.0/29.4/32.0

31.8/39.0/42.4

12.8/13.9

15.2/16.5

25.6/27.8

30.4/33.0

38.4/41.7

17.0

34.0

7.8/ 9.6/10.4

12.0/14.7/16.0

24.0/29.4/32.0

31.8/38.9/42.4

37.5/46.0/50.0

12.8/13.9

15.2/16.5

30.4/33.0

38.4/41.7

46.0/50.0

17.0

34.0

51.0

7.8/ 9.6/10.4

12.0/14.7/16.0

24.0/29.4/32.0

31.8/38.9/42.4

37.5/46.0/50.0

12.8/13.9

15.2/16.5

30.4/33.0

38.4/41.7

46.0/50.0

17.0

34.0

51.0

018

019

017

010

012

012+017

010+012

016

013

015

014+016

013+015

018

019

018+019

017

010

012

012+017

010+012

016

013

015

014+016

013+015

018

019

018+019

ACCESSORY HEATER

PART NUMBER

CRHEATER---A00

017

010

011

012

012+017

016

013

014

015

014+016

018

019

017

010

011

012

012+017

016

013

014

015

014+016

ACCESSORY SINGLE POINT BOX

PART NUMBER

CRSINGLE---A00

006

006

007

007

009

006

006

006

006

008

006

006

011

011

012

012

015

011

011

011

011

014

011

011

011

014

014

011

011

014

011

011

011

012

012

015

015

012

012

012

015

015

011

011

011

014

014

011

014

014

NOTES:

1. The rated heater voltage is 240, 480, and 575 v. If power distribution voltage varies from rated heater voltage, heater kW vary accordingly.

2. To determine heater kW at voltages other than those shown in table, use the following formula:

Heater kW new = Heater kW rated x (unit power distribution voltage / rated heater voltage) 2

As an example:

For a 16 kW heater rated at 240 v with a power distribution voltage of 215 v kW new = 16 kW (215/240) 2 kW new = 12.8 kW (rating at 215 v)

— 10 —

B. Field Control Wiring

Install a Bryant-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals to low-voltage connections on unit (shown in Fig. 9) as described in Steps 1 through 4 below.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American

Wire Gage) insulated wire (35 C minimum). For 51 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over

75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

1. If mounted on a roof curb and electrical power is to be run through the basepan, an accessory thru-thebottom connection kit is required. This is available through the local Bryant distributor. This kit is required to ensure a reliable water-tight connection.

2. If unit is mounted on roof curb and accessory thruthe-bottom service connections are used, route wire through connections.

3. Pass control wires through the hole provided on unit

(see connection D in Connection Sizes table in Fig. 7).

4. Feed wire through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. See Fig. 9. The raceway provides the

COOL STAGE 1

FAN

HEAT STAGE 1

COOL STAGE 2

HEAT STAGE 2

24 VAC HOT

Y1/W2

G

W/W1

Y/Y2

O/W2

R

R

G

Y1

Y2

W1

W2

C

IPD/X

WIRE

CONNECTIONS

TO

LOW-VOLTAGE

SECTION

(CONNECTION

BOARD)

24 VAC COM

N/A

OUTDOOR AIR

SENSOR

C

S1

S2

THERMOSTAT DIPSWITCH SETTINGS

ON

OFF

A B C

LEGEND

D

Field Wiring

NOTE: Underlined letter indicates active thermostat output when configured for A/C operation.

Fig. 9 — Low-Voltage Connections

UL required clearance between the high-voltage and low-voltage wiring.

5. Connect thermostat wires to screw terminals of lowvoltage connector (see Fig. 9).

NOTE: If thru-the-bottom power connections are used refer to the accessory installation instructions for information on power wiring. Refer to Fig. 7 for drilling holes in basepan.

C. Heat Anticipator Settings

For units with electric heat, set heat anticipator settings as shown in Table 4.

VI. STEP 6 — ADJUST FACTORY-INSTALLED OPTIONS

A. Disconnect Switch

The optional disconnect switch is non-fused. The switch has the capability of being locked in place for safety purposes.

B. Perfect Humidity™ Dehumidification System

Perfect Humidity system operation can be controlled by field installation of a Bryant-approved humidistat (Fig. 11), or light commercial Thermidistat™ device (Fig. 12). To install the humidistat:

1. Route humidistat cable through hole provided in unit corner post.

2. Feed wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. See Fig. 10. The raceway provides the

UL-required clearance between high-voltage and lowvoltage wiring.

CONNECTION

BOARD

FACTORY-

INSTALLED

DISCONNECT

(OPTION)

RACEWAY

COMPRESSOR

NO. 2

COMPRESSOR

NO. 1

CONVENIENCE

OUTLET

(OPTION)

HOLE IN

END

PANEL

Fig. 10 — Field Control Wiring Raceway

Table 4 — Heat Anticipator Settings

UNIT

551B

Heater kW*

10.4, 16.0

24.8, 32.0

42.4, 50.0

208/230

Configuration

1-Stage

2-Stage

Stage 1 Stage 2

0.3

0.6

0.9

NA

0.3

0.6

NA

0.3

0.3

Heater kW

13.9, 16.5

27.8, 33.0

41.7, 50.0

UNIT VOLTAGE

0.3

460

Configuration

1-Stage

2-Stage

Stage 1 Stage 2

NA NA

Heater kW

17.0, 34.0

1-Stage

0.3

575

Configuration

Stage 1

NA

0.6

0.3

0.3

51.0

0.6

0.3

*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v or 575 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

2-Stage

Stage 2

NA

0.3

— 11 —

3. Use a wire nut to connect humidistat cable into lowvoltage wiring as shown in Fig. 13.

To install Thermidistat™ device:

1. Route Thermidistat cable through hole provided in unit corner post.

2. Feed the wires through the raceway built into the corner post to the 24-v barrier located on the left side of the control box. See Fig. 10. The raceway provides the

UL-required clearance between high and low voltage wiring.

3. A field-supplied relay must be installed between the

Thermidistat device and the Perfect Humidity™ circuit (recommended relay: HN612KK324) Fig. 14. The relay coil is connected between the DEHUM output and C (common) of the unit. The relay controls the

Perfect Humidity solenoid valve and must be wired between the Perfect Humidity fuse and the lowpressure switch. Refer to the installation instructions included with the Bryant Light Commercial Thermidistat device for more information.

% RELATIVE HUMIDITY

Fig. 11 — Accessory Field-Installed Humidistat

Fig. 12 — Light Commercial Thermidistat Device

CB

— Circuit Breaker

CR

— Cooling Relay

DHR

— Dehumidify Relay

DSV

— Discharge Solenoid Valve

HR

— Heater Relay

HU

— Humidistat

LPS

— Low Pressure Switch

LSV

— Liquid Solenoid Valve

LTLO — Low Temperature Lockout

TB

— Terminal Block

LEGEND

TRAN — Transformer

Field Splice

Terminal (Unmarked)

Splice

Factory Wiring

Field Control Wiring

Fig. 13 — Typical Perfect Humidity Dehumidification System Humidistat Wiring (208/230-v Unit Shown)

LCT

R

C

Y1

Y2

G

W1

W2

DEHUM

OC

R1

ROOF TOP UNIT

R

C

Y1

Y2

G

W1

W2

CB

3.2 AMPS

T STAT WIRES

PINK RED

24 V

LEGEND

CB

— Circuit Breaker

LCT

— Light Commercial Thermidistat Device

LLSV

— Liquid Line Solenoid Valve

LTLO

— Low Temperature Lockout

R1

PINK

LTLO

PINK

FROM

PERFECT HUMIDITY

SYSTEM LLSV

PERFECT HUMIDITY SYSTEM

Fig. 14 — Typical Rooftop Unit with Perfect Humidity Dehumidification System with Thermidistat Device

— 12 —

C. Convenience Outlet

An optional convenience outlet provides power for rooftop use. For maintenance personnel safety, the convenience outlet power is off when the unit disconnect is off. Adjacent unit outlets may be used for service tools. An optional “Hot Outlet” is available from the factory as a special order item.

D. Manual Outdoor-Air Damper

The outdoor-air hood and screen are attached to the basepan at the bottom of the unit for shipping.

Assembly:

1. Determine quantity of ventilation required for building. Record amount for use in Step 8.

2. Remove filter access panel by raising panel and swinging panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove the filter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 15.

3. Separate hood and screen from basepan by removing the screws and brackets securing them. Save all screws and discard brackets.

4. Replace outdoor air opening panel.

5. Place hood on front of outdoor air opening panel. See

Fig. 16 for hood details. Secure top of hood with the

6 screws removed in Step 3. See Fig. 17.

6. Remove and save 8 screws (4 on each side) from sides of the manual outdoor-air damper.

7. Align screw holes on hood with screw holes on side of manual outdoor-air damper. See Fig. 16 and 17.

Secure hood with 8 screws from Step 6.

8. Adjust minimum position setting of the damper blade by adjusting the manual outdoor-air adjustment screws on the front of the damper blade. See Fig. 15.

Slide blade vertically until it is in the appropriate position determined by Fig. 18. Tighten screws.

9. Remove and save screws currently on sides of hood.

Insert screen. Secure screen to hood using the screws.

See Fig. 17.

10. Replace filter access panel. Ensure filter access panel slides along the tracks and is securely engaged.

E. Optional EconoMi$er IV

See Fig. 19 for EconoMi$er IV component locations.

NOTE: These instructions are for installing the optional

EconoMi$er IV. Refer to the accessory EconoMi$er IV installation instructions when field installing an EconoMi$er IV accessory.

FILTER

ACCESS

PANEL

OUTDOOR AIR

OPENING

PANEL

SCREWS

(SIDE)

1. To remove the existing unit filter access panel, raise the panel and swing the bottom outward. The panel is now disengaged from the track and can be removed.

See Fig. 20.

SCREW

HOLES

(TOP)

HOOD

HOOD

SCREEN

LOCATION

(SCREEN

NOT

SHOWN)

Fig. 16 — Outdoor-Air Hood Details

Fig. 17 — Optional Manual Outdoor-Air

Damper with Hood Attached

MANUAL

OUTDOOR-AIR

ADJUSTMENT

SCREWS

DAMPER

BLADE

Fig. 15 — Damper Panel with Manual

Outdoor-Air Damper Installed

— 13 —

Fig. 18 — Outdoor Air Damper Position Setting

2. The box with the economizer hood components is shipped in the compartment behind the economizer.

The EconoMi$er IV controller is mounted on top of the EconoMi$er IV in the position shown in Fig. 19.

To remove the component box from its shipping position, remove the screw holding the hood box bracket to the top of the economizer. Slide the hood box out of the unit. See Fig. 21.

IMPORTANT: If the power exhaust accessory is to be installed on the unit, the hood shipped with the unit will not be used and must be discarded. Save the aluminum filter

for use in the power exhaust hood assembly.

3. The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bottom of the indoor coil access panel. See Fig. 22.

4. Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit.

See Fig. 23.

5. Remove the shipping tape holding the economizer barometric relief damper in place.

6. Insert the hood divider between the hood sides. See

Fig. 23 and 24. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

7. Open the filter clips which are located underneath the hood top. Insert the aluminum filter into the bottom filter rack (hood divider). Push the filter into

WIRING

HARNESS

ACTUATOR

ECONOMI$ER IV

CONTROLLER

OUTSIDE AIR

TEMPERATURE SENSOR

LOW AMBIENT

SENSOR position past the open filter clips. Close the filter clips to lock the filter into place. See Fig. 24.

8. Caulk the ends of the joint between the unit top panel and the hood top. See Fig. 22.

9. Replace the filter access panel.

10. Install all EconoMi$er IV accessories. EconoMi$er IV wiring is shown in Fig. 25.

Barometric flow capacity is shown in Fig. 26. Outdoor air leakage is shown in Fig. 27. Return air pressure drop is shown in Fig. 28.

F. EconoMi$er IV Standard Sensors

Outdoor Air Temperature (OAT) Sensor

The outdoor air temperature sensor (HH57AC074) is a 10 to

20 mA device used to measure the outdoor-air temperature.

The outdoor-air temperature is used to determine when the

EconoMi$er IV can be used for free cooling. The sensor is factory-installed on the EconoMi$er IV in the outdoor airstream. See Fig. 19. The operating range of temperature measurement is 40 to 100 F.

Supply Air Temperature (SAT) Sensor

The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan. See Fig. 29. This sensor is factory installed. The operating range of temperature measurement is 0° to 158 F. See Table 5 for sensor temperature/resistance values.

Hood

Box

HOOD BOX

BRACKET

Fig. 21 — Hood Box Removal

Fig. 19 — EconoMi$er IV Component Locations

FILTER ACCESS PANEL

SIDE

PANEL

INDOOR COIL ACCESS PANEL

Fig. 20 — Typical Access Panel Locations

— 14 —

INDOOR

COIL

ACCESS

PANEL

CAULK

HERE

TOP

SIDE

PANEL

INDOOR

COIL

ACCESS

PANEL

Fig. 22 — Indoor Coil Access Panel Relocation

22 1/4”

TOP

PANEL

INDOOR COIL

ACCESS PANEL

LEFT

HOOD

SIDE

SCREW

40 3/8”

HOOD DIVIDER

Fig. 23 — Outdoor-Air Hood Construction

BAROMETRIC

RELIEF

DIVIDER

OUTSIDE

AIR

CLEANABLE

ALUMINUM

FILTER

FILTER

HOOD

FILTER

CLIP

Fig. 24 — Filter Installation

FOR OCCUPANCY CONTROL

REPLACE JUMPER WITH

FIELD-SUPPLIED TIME CLOCK

LEGEND

DCV— Demand Controlled Ventilation

IAQ — Indoor Air Quality

LA — Low Ambient Lockout Device

OAT — Outdoor-Air Temperature

POT — Potentiometer

RAT — Return-Air Temperature

Potentiometer Defaults Settings:

Power Exhaust Middle

Minimum Pos.

Fully Closed

DCV Max.

Middle

DCV Set

Enthalpy

Middle

C Setting

NOTES:

1. 620 ohm, 1 watt 5% resistor should be removed only when using differential enthalpy or dry bulb.

2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded.

3. For field-installed remote minimum position POT, remove black wire jumper between P and P1 and set control minimum position POT. to the minimum position.

Fig. 25 — EconoMi$er IV Wiring

— 15 —

2500

2000

1500

1000

500

0

0.05

0.15

STATIC PRESSURE (in. wg)

0.25

Fig. 26 — Barometric Relief Flow Capacity

30

25

20

15

10

5

0

0.13 0.20 0.22 0.25 0.30 0.35 0.40 0.45 0.50

STATIC PRESSURE (in. wg)

Fig. 27 — Outdoor Air Damper Leakage

6000

5000

4000

3000

2000

1000

0

0.05 0.10 0.15 0.20 0.25 0.30 0.35

STATIC PRESSURE (in. wg)

Fig. 28 — Return Air Pressure Drop

SUPPLY AIR

TEMPERATURE

SENSOR

MOUNTING

LOCATION

SUPPLY AIR

TEMPERATURE

SENSOR

Fig. 29 — Supply Air Sensor Location

Table 5 — Supply Air Sensor Temperature/Resistance

Values

TEMPERATURE (F)

–58

–40

–22

–4

14

32

50

68

77

86

104

122

230

248

257

266

284

302

140

158

176

185

194

212

RESISTANCE (ohms)

200,250

100,680

53,010

29,091

16,590

9,795

5,970

3,747

3,000

2,416

1,597

1,080

153

116

102

89

70

55

746

525

376

321

274

203

The temperature sensor looks like an eyelet terminal with wires running to it. The sensor is located in the “crimp end” and is sealed from moisture.

Outdoor Air Lockout Sensor

The Economi$er IV is equipped with an ambient temperature lockout switch located in the outdoor airstream which is used to lock out the compressors below a 42 F ambient temperature. See Fig. 19.

G. EconoMi$er IV Control Modes

Determine the EconoMi$er IV control mode before set up of the control. Some modes of operation may require different sensors.

Refer to Table 6. The EconoMi$er IV is supplied from the factory with a supply air temperature sensor and an outdoor air temperature sensor. This allows for operation of the

EconoMi$er IV with outdoor air dry bulb changeover control.

Additional accessories can be added to allow for different types of changeover control and operation of the EconoMi$er

IV and unit.

Table 6 — EconoMi$er IV Sensor Usage

APPLICATION

Outdoor Air Dry Bulb

Differential Dry Bulb

Single Enthalpy

Differential Enthalpy

ECONOMI$ER IV WITH OUTDOOR AIR

DRY BULB SENSOR

Accessories Required

None. The outdoor air dry bulb sensor is factory installed.

CRTEMPSN002A00*

HH57AC078

HH57AC078 and

CRENTDIF004A00*

CO

2

for DCV Control using a Wall-Mounted

CO

2

Sensor

CO

2

for DCV Control using a Duct-Mounted

CO

2

Sensor

33ZCSENCO2† and

33ZCSENCO2

33ZCASPCO2**

CRCBDIOX005A00††

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed for installation.

†33ZCSENCO2 is an accessory CO

2

sensor.

**33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.

††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.

— 16 —

Outdoor Dry Bulb Changeover

The standard controller is shipped from the factory configured for outdoor dry bulb changeover control. The outdoor air and supply air temperature sensors are included as standard. For this control mode, the outdoor temperature is compared to an adjustable set point selected on the control. If the outdoor-air temperature is above the set point, the EconoMi$er IV will adjust the outdoor-air dampers to minimum position. If the outdoor-air temperature is below the set point, the position of the outdoor-air dampers will be controlled to provide free cooling using outdoor air. When in this mode, the LED next to the free cooling set point potentiometer will be on. The changeover temperature set point is controlled by the free cooling set point potentiometer located on the control. See Fig. 30. The scale on the potentiometer is A, B, C, and D. See Fig. 31 for the corresponding temperature changeover values.

Differential Dry Bulb Control

For differential dry bulb control the standard outdoor dry bulb sensor is used in conjunction with an additional accessory dry bulb sensor (part number CRTEMPSN002A00). The accessory sensor must be mounted in the return airstream.

See Fig. 32. Wiring is provided in the EconoMi$er IV wiring harness. See Fig. 25.

In this mode of operation, the outdoor-air temperature is compared to the return-air temperature and the lower temperature airstream is used for cooling. When using this mode of changeover control, turn the enthalpy set point potentiometer fully clockwise to the D setting. See Fig. 30.

Outdoor Enthalpy Changeover

For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. See Fig. 19. When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point, the outdoor-air damper moves to its minimum position. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$er IV controller. The set points are A, B,

C, and D. See Fig. 33. The factory-installed 620-ohm jumper must be in place across terminals SR and SR+ on the

EconoMi$er IV controller. See Fig. 19 and 34.

Differential Enthalpy Control

For differential enthalpy control, the EconoMi$er IV controller uses two enthalpy sensors (HH57AC078 and

CRENTDIF004A00), one in the outside air and one in the return air duct. The EconoMi$er IV controller compares the outdoor air enthalpy to the return air enthalpy to determine

EconoMi$er IV use. The controller selects the lower enthalpy air (return or outdoor) for cooling. For example, when the outdoor air has a lower enthalpy than the return air, the

EconoMi$er IV opens to bring in outdoor air for free cooling.

Replace the standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. See Fig. 19. Mount the return air enthalpy sensor in the return air duct. See Fig. 32. Wiring is provided in the

EconoMi$er IV wiring harness. See Fig. 25. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$er IV controller. When using this mode of changeover control, turn the enthalpy setpoint potentiometer fully clockwise to the D setting.

Fig. 30 — EconoMi$er IV Controller Potentiometer and LED Locations

19

18

17

LED ON

D

16

15

LED OFF

LED ON

C

14

LED OFF

LED ON

B

13

12

LED OFF

LED ON

A

11

10

LED OFF

9

40 45 50 55 60 65 70 75 80 85 90 95

100

DEGREES FAHRENHEIT

Fig. 31 — Outdoor Air Temperature Changeover Set Points

ECONOMI$ER IV

CONTROLLER

ECONOMI$ER IV

GROMMET

RETURN AIR

SENSOR

RETURN DUCT

(FIELD-PROVIDED)

Fig. 32 — Return Air Temperature or

Enthalpy Sensor Mounting Location

— 17 —

Indoor Air Quality (IAQ) Sensor Input

The IAQ input can be used for demand control ventilation control based on the level of CO

2

measured in the space or return air duct.

Mount the accessory IAQ sensor according to manufacturer specifications. The IAQ sensor should be wired to the AQ and

AQ1 terminals of the controller. Adjust the DCV potentiometers to correspond to the DCV voltage output of the indoor air quality sensor at the user-determined set point. See Fig. 35.

If a separate field-supplied transformer is used to power the

IAQ sensor, the sensor must not be grounded or the

EconoMi$er IV control board will be damaged.

CONTROL

CURVE

14

C

D

A

B

1

6

CONTROL POINT

APPROX. °F (°C)

AT 50% RH

73 (23)

70 (21)

67 (19)

63 (17)

Y A

IR

Y—

BTU

28

HA

LP

26

PO

UN

D DR

34

36

P

ER

30

32

ENT

24

38

65

(18)

40

42

44

46

70

(21)

10

0

90

75

(24)

80

70

80

(27)

60

20

2

2

60

(16)

A

18

55

(13)

B

50

(10)

C

12

45

(7)

D

50

40

(4)

35

(2)

85

(29)

90

(32)

95

(35)

100

(38)

105

(41)

110

(43)

40

RELA

30

TIVE HUM

IDITY

20

(%

)

10

D

C

B

A

35

(2)

40

(4)

45

(7)

50

(10)

55

(13)

60

(16)

65

(18)

70

(21)

75

(24)

80

(27)

APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

85

(29)

90

(32)

95

(35)

100

(38)

Fig. 33 — Enthalpy Changeover Set Points

105

(41)

110

(43)

HIGH LIMIT

CURVE

N1

N

P1

T1

P

T

EXH

Set

10V 2V

EXH

Open

Min

Pos

AQ1

AQ

SO+

SO

SR+

SR

2V

DCV

Max

10V

DCV

2V

Free

Cool

B

DCV

Set

10V

A

C

D

TR

1

3

EF

Fig. 34 — EconoMi$er IV Control

TR1

24

Vac

HOT

+

24 Vac

COM

_

2

5

4

EF1

6000

5000

4000

3000

2000

1000

800 ppm

900 ppm

1000 ppm

1100 ppm

0

2 3 4 5 6 7 8

DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 35 — CO

2

Sensor Maximum Range Setting

— 18 —

Exhaust Set Point Adjustment

The exhaust set point will determine when the exhaust fan runs based on damper position (if accessory power exhaust is installed). The set point is modified with the Exhaust Fan

Set Point (EXH SET) potentiometer. See Fig. 30. The set point represents the damper position above which the exhaust fans will be turned on. When there is a call for exhaust, the EconoMi$er IV controller provides a 45 ±

15 second delay before exhaust fan activation to allow the dampers to open. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload.

Minimum Position Control

There is a minimum damper position potentiometer on the

EconoMi$er IV controller. See Fig. 30. The minimum damper position maintains the minimum airflow into the building during the occupied period.

When using demand ventilation, the minimum damper position represents the minimum ventilation position for VOC

(volatile organic compound) ventilation requirements. The maximum demand ventilation position is used for fully occupied ventilation.

When demand ventilation control is not being used, the minimum position potentiometer should be used to set the occupied ventilation position. The maximum demand ventilation position should be turned fully clockwise.

Adjust the minimum position potentiometer to allow the minimum amount of outdoor air, as required by local codes, to enter the building. Make minimum position adjustments with at least 10 F temperature difference between the outdoor and return-air temperatures.

To determine the minimum position setting, perform the following procedure:

1. Calculate the appropriate mixed-air temperature using the following formula:

(T

O

x

OA

100

) + (T

R

x

RA

100

) = T

M

T

O

= Outdoor-Air Temperature

OA = Percent of Outdoor Air

T

R

= Return-Air Temperature

RA = Percent of Return Air

T

M

= Mixed-Air Temperature

As an example, if local codes require 10% outdoor air during occupied conditions, outdoor-air temperature is 60 F, and return-air temperature is 75 F.

(60 x .10) + (75 x .90) = 73.5 F

2. Disconnect the supply air sensor from terminals T and T1.

3. Ensure that the factory-installed jumper is in place across terminals P and P1. If remote damper positioning is being used, make sure that the terminals are wired according to Fig. 25 and that the minimum position potentiometer is turned fully clockwise.

4. Connect 24 vac across terminals TR and TR1.

5. Carefully adjust the minimum position potentiometer until the measured mixed-air temperature matches the calculated value.

6. Reconnect the supply-air sensor to terminals T and T1.

Remote control of the EconoMi$er IV damper is desirable when requiring additional temporary ventilation. If a field-supplied remote potentiometer (Honeywell part number S963B1128) is wired to the EconoMi$er IV controller, the minimum position of the damper can be controlled from a remote location.

To control the minimum damper position remotely, remove the factory-installed jumper on the P and P1 terminals on the EconoMi$er IV controller. Wire the field-supplied potentiometer to the P and P1 terminals on the EconoMi$er IV controller. See Fig. 34.

Damper Movement

Damper movement from full open to full closed (or vice versa) takes 2

1

/

2

minutes.

Thermostats

The EconoMi$er IV control works with conventional thermostats that have a Y1 (cool stage 1), Y2 (cool stage 2), W1

(heat stage 1), W2 (heat stage 2), and G (fan). The

EconoMi$er IV control does not support space temperature sensors. Connections are made at the thermostat terminal connection board located in the main control box.

Occupancy Control

The factory default configuration for the EconoMi$er IV control is occupied mode. Occupied status is provided by the black jumper from terminal TR to terminal N. When unoccupied mode is desired, install a field-supplied timeclock function in place of the jumper between TR and N. See Fig. 25.

When the timeclock contacts are closed, the EconoMi$er IV control will be in occupied mode. When the timeclock contacts are open (removing the 24-v signal from terminal N), the EconoMi$er IV will be in unoccupied mode.

Demand Controlled Ventilation (DCV)

When using the EconoMi$er IV for demand controlled ventilation, there are some equipment selection criteria which should be considered. When selecting the heat capacity and cool capacity of the equipment, the maximum ventilation rate must be evaluated for design conditions. The maximum damper position must be calculated to provide the desired fresh air.

Typically the maximum ventilation rate will be about 5 to

10% more than the typical cfm required per person, using normal outside air design criteria.

A proportional anticipatory strategy should be taken with the following conditions: a zone with a large area, varied occupancy, and equipment that cannot exceed the required ventilation rate at design conditions. Exceeding the required ventilation rate means the equipment can condition air at a maximum ventilation rate that is greater than the required ventilation rate for maximum occupancy. A proportionalanticipatory strategy will cause the fresh air supplied to increase as the room CO

2

level increases even though the

CO

2

set point has not been reached. By the time the CO

2 level reaches the set point, the damper will be at maximum ventilation and should maintain the set point.

In order to have the CO

2

sensor control the economizer damper in this manner, first determine the damper voltage output for minimum or base ventilation. Base ventilation is the ventilation required to remove contaminants during unoccupied periods. The following equation may be used to determine the percent of outside-air entering the building for a given damper position. For best results there should be at least a 10 degree difference in outside and return-air temperatures.

(T

O

x

OA

100

) + (T

R

x

RA

100

) = T

M

T

O

= Outdoor-Air Temperature

OA = Percent of Outdoor Air

T

R

= Return-Air Temperature

RA = Percent of Return Air

T

M

= Mixed-Air Temperature

— 19 —

Once base ventilation has been determined, set the minimum damper position potentiometer to the correct position.

The same equation can be used to determine the occupied or maximum ventilation rate to the building. For example, an output of 3.6 volts to the actuator provides a base ventilation rate of 5% and an output of 6.7 volts provides the maximum ventilation rate of 20% (or base plus 15 cfm per person). Use

Fig. 35 to determine the maximum setting of the CO

2

sensor.

For example, a 1100 ppm set point relates to a 15 cfm per person design. Use the 1100 ppm curve on Fig. 35 to find the point when the CO

2

sensor output will be 6.7 volts. Line up the point on the graph with the left side of the chart to determine that the range configuration for the CO

2

sensor should be 1800 ppm. The EconoMi$er IV controller will output the

6.7 volts from the CO

2

sensor to the actuator when the CO

2 concentration in the space is at 1100 ppm. The DCV set point may be left at 2 volts since the CO

2

sensor voltage will be ignored by the EconoMi$er IV controller until it rises above the 3.6 volt setting of the minimum position potentiometer.

Once the fully occupied damper position has been determined, set the maximum damper demand control ventilation potentiometer to this position. Do not set to the maximum position as this can result in over-ventilation to the space and potential high-humidity levels.

CO

2

Sensor Configuration

The CO

2

sensor has preset standard voltage settings that can be selected anytime after the sensor is powered up. See

Table 7.

Use setting 1 or 2 for Bryant equipment. See Table 7.

1. Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to select the preset number.

See Table 7.

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume normal operation.

The custom settings of the CO

2

sensor can be changed anytime after the sensor is energized. Follow the steps below to change the non-standard settings:

1. Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appear.

3. Use the Up/Down button to toggle to the NONSTD menu and press Enter.

4. Use the Up/Down button to toggle through each of the nine variables, starting with Altitude, until the desired setting is reached.

5. Press Mode to move through the variables.

6. Press Enter to lock in the selection, then press Mode to continue to the next variable.

Dehumidification of Fresh Air with DCV Control

Information from ASHRAE indicates that the largest humidity load on any zone is the fresh air introduced. For some applications, an energy recovery unit is added to reduce the moisture content of the fresh air being brought into the building when the enthalpy is high. In most cases, the normal heating and cooling processes are more than adequate to remove the humidity loads for most commercial applications.

If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit and/or a dehumidification option should be considered.

SETTING EQUIPMENT

3

4

1

2

Interface w/Standard

Building Control System

5

6

Economizer

7

8

Health & Safety

9

Parking/Air Intakes/

Loading Docks

LEGEND

ppm — Parts Per Million

OUTPUT

Table 7 — CO

2

Sensor Standard Settings

Proportional

Proportional

Exponential

Proportional

Proportional

Exponential

Exponential

Proportional

Proportional

VENTILATION

RATE

(cfm/Person)

Any

Any

Any

15

20

15

20

—

—

ANALOG

OUTPUT

0-10V

4-20 mA

2-10V

7-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

CO

2

CONTROL RANGE

(ppm)

0-2000

0-2000

0-2000

0-1100

0- 900

0-1100

0- 900

0-9999

0-2000

OPTIONAL

RELAY SETPOINT

(ppm)

1000

1000

1100

1100

900

1100

900

5000

700

RELAY

HYSTERESIS

(ppm)

50

50

50

50

50

50

50

500

50

— 20 —

VII. STEP 7 — ADJUST EVAPORATOR-FAN SPEED

Adjust evaporator-fan rpm to meet jobsite conditions.

For units with electric heat, required minimum cfm is 2250 for 551B090 and 102 and 3000 for 551B120 and 150. See

Table 8 for exceptions.

Table 8 — Minimum Required Airflow Exceptions

UNIT

551B

120,150

090-150

UNIT

VOLTAGE

208/230

208/230

460

575

HEATER kW

42.4

50.0

50.0

17.0

34.0

UNIT

CONFIG-

URATION

Horizontal

Horizontal

Horizontal or Vertical

Horizontal or Vertical

REQUIRED

MINIMUM

CFM

3200

3200

3200

2800

2350

Tables 9 and 10 show fan rpm at motor pulley settings for standard and high-static motors. Tables 11 and 12 show evaporator-fan motor data. See Tables 13 and 14 and Fig. 36 for accessory and option static pressure drops. Refer to

Tables 15-28 to determine fan speed settings.

Fan motor pulleys are factory set for speed shown in Table 1.

To change fan speeds:

1. Shut off unit power supply and install lockout tag.

2. Loosen belt by loosening fan motor mounting nuts.

See Fig. 37 and 38.

3. Loosen movable pulley flange setscrew (see Fig. 39).

4. Screw movable flange toward fixed flange to increase rpm or away from fixed flange to decrease rpm.

Increasing fan rpm increases load on motor. Do not exceed maximum speed specified in Table 1.

5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange.)

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley along fan shaft.

3. Make angular alignment by loosening motor from mounting plate.

To adjust belt tension:

1. Loosen fan motor mounting nuts.

2. Size 090 — Slide motor mounting plate away from fan scroll for proper belt tension (

1

/

2

-in. deflection with

8 to 10 lb of force) and tighten mounting nuts (see

Fig. 37).

Sizes 102-150 — Slide motor mounting plate downward to tighten belt tension. Secure motor mounting plate nuts. See Fig. 38. Use 1 /

2 force.

-in. deflection with 10 lb of

3. Adjust bolt and nut on mounting plate to secure motor in fixed position.

MOTOR MOUNTING

PLATE NUTS

Fig. 37 — Typical Belt-Drive Motor Mounting for

Size 090

0.35

0.3

0.25

0.2

0.15

0.1

0.05

7.5 ton

8.5, 10 & 12.5 ton

0

0

1000 2000 3000 4000 5000 6000

CFM

Fig. 36 — Perfect Humidity™ Dehumidification System Static Pressure Drop (in. wg)

— 21 —

Fig. 38 — Typical Belt-Drive Motor Mounting for

Sizes 102-150

Fig. 39 — Indoor-Fan Pulley Adjustment

UNIT

551B

090,102

120

150

0

1085

1080

1130

1

/

2

1060

1060

1112

*Approximate fan rpm shown.

Table 9 — Fan Rpm at Motor Pulley Setting*; Standard Motor/Drive

1

1035

1035

1087

1

1

/

2

1010

1015

1062

2

985

990

1037

MOTOR PULLEY TURNS OPEN

2

1

/

2

960

3

935

3

1

/

2

910

970

1212

950

987

925

962

4

890

905

937

4

1

/

2

865

880

912

5

840

860

887

5

1

/

2

—

—

862

6

—

—

830

UNIT

551B

090

102

120

0

1080

1080

1130

1 /

2

1025

1025

1112

*Approximate fan rpm shown.

Table 10 — Fan Rpm at Motor Pulley Setting*; High-Static Motor/Drive

1

1007

1007

1087

1 1 /

2

988

988

1062

2

970

970

1037

MOTOR PULLEY TURNS OPEN

2 1 /

2

952

952

1212

3

933

933

987

3 1 /

2

915

915

962

4

897

897

937

4 1 /

2

878

878

912

5

860

860

887

5 1 /

2

—

—

862

6

—

—

830

UNIT

551B

090,102

120

150

UNIT

PHASE

Three

Three

Three

Table 11 — Evaporator-Fan Motor Data — Standard Motor

MAXIMUM

CONTINUOUS BHP*

2.90

3.70

5.25

MAXIMUM

OPERATING WATTS*

2615

3775

4400

UNIT VOLTAGE

208/230

460

575

208/230

460

575

208/230

460

575

LEGEND

BHP — Brake Horsepower

*Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence. Using your fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

MAXIMUM

AMP DRAW

8.6

3.9

3.9

12.2

5.5

5.5

17.3

8.5

8.5

— 22 —

UNIT

5551B

090,102

120

UNIT

PHASE

Three

Three

Table 12 — Evaporator-Fan Motor Data — High-Static Motors

MAXIMUM

CONTINUOUS BHP*

4.20

5.25

MAXIMUM

OPERATING WATTS*

3775

4400

UNIT VOLTAGE

208/230

460

575

208/230

460

575

LEGEND

BHP — Brake Horsepower

*Extensive motor and electrical testing on these units ensures that the full horsepower and watts range of the motors can be utilized with confidence. Using your fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

MAXIMUM

AMP DRAW

12.2

5.5

5.5

17.3

8.5

8.5

Table 13 — Accessory/FIOP EconoMi$er IV Static Pressure* (in. wg)

COMPONENT

Vertical EconoMi$er IV

Horizontal EconoMi$er IV

2250 2500 2750

0.06

0.075

— 0.1

0.09

3000

0.115

0.13

0.15

0.17

0.195

0.22

0.25

0.285

0.325

0.36

0.125

0.15

3250

0.18

3500

0.21

3750

0.25

CFM

4000

0.275

4250

0.3

4500

0.34

4750

0.388

5000

—

5250

—

6250

—

—

LEGEND

FIOP — Factory-Installed Option

*The static pressure must be added to external static pressure. The sum and the evaporator enteringair cfm should be used in conjunction with the Fan Performance tables to determine indoor blower rpm and watts.

Table 14 — Accessory/FIOP Electric Heaters Static Pressure (in. wg)

COMPONENT

1 Heater Module

2 Heater Modules

LEGEND

FIOP — Factory-Installed Option

2200

0.02

0.03

2500

0.03

0.05

3000

0.05

0.07

3500

0.065

0.09

CFM

4000

0.08

0.12

4500

0.10

0.14

5000

0.12

0.16

5500

0.14

0.19

6000

0.155

0.21

*The static pressure must be added to external static pressure. The sum and the evaporator entering-air cfm should be used in conjunction with the Fan Performance tables to determine indoor blower rpm and watts.

GENERAL FAN PERFORMANCE NOTES

1. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using fan motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

For additional information on motor performance refer to Evaporator-Fan Motor Data, Tables 11 and 12.

2. Values include losses for filters, unit casing, and wet coils. See

Tables 13 and 14 and Fig. 36 for accessory/FIOP static pressure information.

3. Use of a field-supplied motor may affect wire sizing. Contact

Bryant representative to verify.

4. Interpolation is permissible. Do not extrapolate.

— 23 —

AIRFLOW

CFM

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

2250

2300

2400

2500

2550

2600

2700

2800

Table 15 — Fan Performance 551B090 — Vertical Discharge Units; Standard Motor (Belt Drive)*

Rpm

613

630

646

663

679

696

713

729

746

755

511

519

534

550

558

565

581

597

0.2

Bhp Watts Rpm

0.97

1.06

1.15

1.25

1.35

1.46

1.58

1.70

1.83

1.89

0.53

0.56

0.61

0.67

0.71

0.74

0.81

0.89

492

518

571

629

660

691

758

829

905

985

1071

1162

1259

1361

1469

1583

1703

1766

681

696

711

726

741

756

772

787

803

811

591

597

611

624

631

638

652

667

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.22

1.31

1.41

1.51

1.62

1.74

1.86

1.99

2.13

2.20

0.73

0.76

0.82

0.89

0.93

0.97

1.04

1.13

680

709

768

832

866

901

974

1051

1133

1220

1313

1411

1514

1623

1737

1857

1985

2051

742

756

770

784

798

812

827

841

856

864

660

666

678

690

697

703

716

729

0.6

Bhp

1.48

1.58

1.68

1.79

1.91

2.03

2.16

2.30

2.44

2.52

0.95

0.98

1.05

1.13

1.17

1.21

1.29

1.38

Watts

1376

1469

1568

1672

1781

1896

2017

2144

2277

2346

885

916

982

1051

1088

1125

1204

1287

Rpm

799

811

824

837

851

864

878

892

906

913

722

727

739

750

756

762

774

786

0.8

Bhp Watts Rpm

1.75

1.86

1.97

2.09

2.21

2.34

2.48

2.62

2.77

2.84

1.19

1.22

1.30

1.38

1.42

1.46

1.55

1.65

1106

1140

1210

1285

1324

1365

1449

1538

1632

1731

1835

1944

2060

2181

2308

2441

2580

2653

851

863

875

888

900

913

926

—

—

—

779

784

795

805

811

816

828

839

1.0

Bhp

2.04

2.15

2.27

2.39

2.52

2.66

2.80

—

—

—

1.44

1.48

1.56

1.64

1.69

1.73

1.83

1.93

Watts

1900

2004

2114

2229

2351

2478

2610

—

—

—

1342

1378

1453

1533

1574

1617

1707

1801

AIRFLOW

CFM

2250

2300

2400

2500

2550

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

Rpm

832

837

847

857

862

867

878

889

900

912

923

935

947

—

—

—

—

—

LEGEND

1.2

Bhp

1.71

1.75

1.83

1.92

1.97

2.02

2.12

2.23

2.34

2.46

2.58

2.71

2.84

—

—

—

—

—

Watts

1592

1630

1710

1794

1838

1884

1978

2077

2181

2290

2406

2526

2652

—

—

—

—

—

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

882

886

896

905

910

915

926

936

947

958

969

—

—

—

—

—

—

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

1.99

2.03

2.12

2.22

2.27

2.32

2.42

2.54

2.65

2.78

2.90

—

—

—

—

—

—

—

1855

1896

1980

2069

2114

2162

2261

2365

2474

2588

2708

—

—

—

—

—

—

—

928

933

942

951

956

961

971

981

—

—

—

—

—

—

—

—

—

—

1.6

Bhp

2.29

2.33

2.43

2.52

2.58

2.63

2.74

2.86

—

—

—

—

—

—

—

—

—

—

Watts

2131

2174

2262

2355

2403

2453

2556

2664

—

—

—

—

—

—

—

—

—

—

Rpm

973

977

986

995

999

—

—

—

—

—

—

—

—

—

—

—

—

—

1.8

Bhp Watts Rpm

2.59

2.64

2.74

2.84

2.90

—

—

—

—

—

—

—

—

—

—

—

—

—

2420

2463

2556

2653

2704

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See page 23 for general fan performance notes.

*Motor drive range: 840 to 1085 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Watts

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

— 24 —

AIRFLOW

CFM

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

2250

2300

2400

2500

2550

2600

2700

2800

Table 16 — Fan Performance 551B090 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

Rpm

613

630

646

663

679

696

713

729

746

755

511

519

534

550

558

565

581

597

0.2

Bhp Watts Rpm

0.97

1.06

1.15

1.25

1.35

1.46

1.58

1.70

1.83

1.89

0.53

0.56

0.61

0.67

0.71

0.74

0.81

0.89

492

518

571

629

660

691

758

829

905

985

1071

1162

1259

1361

1469

1583

1703

1766

681

696

711

726

741

756

772

787

803

811

591

597

611

624

631

638

652

667

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.22

1.31

1.41

1.51

1.62

1.74

1.86

1.99

2.13

2.20

0.73

0.76

0.82

0.89

0.93

0.97

1.04

1.13

680

709

768

832

866

901

974

1051

1133

1220

1313

1411

1514

1623

1737

1857

1985

2051

742

756

770

784

798

812

827

841

856

864

660

666

678

690

697

703

716

729

0.6

Bhp

1.48

1.58

1.68

1.79

1.91

2.03

2.16

2.30

2.44

2.52

0.95

0.98

1.05

1.13

1.17

1.21

1.29

1.38

Watts

1376

1469

1568

1672

1781

1896

2017

2144

2277

2346

885

916

982

1051

1088

1125

1204

1287

Rpm

799

811

824

837

851

864

878

892

906

913

722

727

739

750

756

762

774

786

0.8

Bhp Watts Rpm

1.75

1.86

1.97

2.09

2.21

2.34

2.48

2.62

2.77

2.84

1.19

1.22

1.30

1.38

1.42

1.46

1.55

1.65

1106

1140

1210

1285

1324

1365

1449

1538

1632

1731

1835

1944

2060

2181

2308

2441

2580

2653

851

863

875

888

900

913

926

939

953

959

779

784

795

805

811

816

828

839

1.0

Bhp

2.04

2.15

2.27

2.39

2.52

2.66

2.80

2.95

3.10

3.18

1.44

1.48

1.56

1.64

1.69

1.73

1.83

1.93

Watts

1900

2004

2114

2229

2351

2478

2610

2749

2894

2969

1342

1378

1453

1533

1574

1617

1707

1801

AIRFLOW

CFM

2250

2300

2400

2500

2550

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

Rpm

832

837

847

857

862

867

878

889

900

912

923

935

947

959

972

984

997

1004

LEGEND

1.2

Bhp

1.71

1.75

1.83

1.92

1.97

2.02

2.12

2.23

2.34

2.46

2.58

2.71

2.84

2.99

3.13

3.29

3.45

3.54

Watts

1592

1630

1710

1794

1838

1884

1978

2077

2181

2290

2406

2526

2652

2785

2923

3068

3218

3296

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

882

886

896

905

910

915

926

936

947

958

969

980

992

1003

1015

1027

1040

1046

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

1.99

2.03

2.12

2.22

2.27

2.32

2.42

2.54

2.65

2.78

2.90

3.04

3.18

3.33

3.48

3.64

3.81

3.90

1855

1896

1980

2069

2114

2162

2261

2365

2474

2588

2708

2834

2966

3103

3246

3396

3553

3633

928

933

942

951

956

961

971

981

991

1001

1012

1023

1034

1045

1057

1068

1080

—

1.6

Bhp

2.29

2.33

2.43

2.52

2.58

2.63

2.74

2.86

2.98

3.11

3.24

3.38

3.53

3.68

3.84

4.01

4.18

—

Watts

2131

2174

2262

2355

2403

2453

2556

2664

2778

2897

3022

3152

3289

3432

3581

3736

3897

—

Rpm

973

977

986

995

999

1004

1013

1023

1033

1043

1053

1064

1075

1086

—

—

—

—

1.8

Bhp Watts Rpm

2.59

2.64

2.74

2.84

2.90

2.95

3.07

3.19

3.32

3.45

3.59

3.73

3.89

4.04

—

—

—

—

2420

2463

2556

2653

2704

2755

2862

2975

3094

3217

3347

3482

3623

3771

—

—

—

—

1015

1020

1028

1037

1041

1045

1055

1064

1073

1083

1093

1103

—

—

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 4.20.

3. See page 23 for general fan performance notes.

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

2.92

2.97

3.07

3.18

3.23

3.29

3.41

3.54

3.67

3.80

3.95

4.10

—

—

—

—

—

—

Watts

2720

2766

2861

2962

3014

3068

3180

3297

3419

3547

3682

3821

—

—

—

—

—

—

— 25 —

AIRFLOW

CFM

3300

3400

3500

3600

3700

3800

3900

4000

2500

2600

2700

2800

2900

3000

3100

3200

4100

4200

4300

Table 17 — Fan Performance 551B102 — Vertical Discharge Units; Standard Motor (Belt Drive)*

Rpm

597

611

625

639

654

668

683

697

489

502

515

529

542

556

569

583

712

726

741

0.2

Bhp Watts Rpm

0.83

0.89

0.96

1.04

1.11

1.20

1.28

1.37

0.41

0.45

0.50

0.55

0.59

0.65

0.70

0.76

1.47

1.57

1.67

386

424

465

508

555

604

656

712

770

832

898

967

1040

1116

1197

1281

1370

1462

1559

661

674

687

700

713

726

739

753

564

576

587

599

611

623

636

648

766

780

794

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.00

1.07

1.14

1.22

1.31

1.39

1.48

1.58

0.54

0.59

0.64

0.69

0.74

0.80

0.86

0.93

1.68

1.79

1.89

506

548

594

642

693

748

805

865

929

996

1066

1140

1218

1299

1385

1474

1567

1665

1767

718

730

742

754

767

779

792

804

629

640

650

661

672

684

695

707

817

830

843

0.6

Bhp

1.17

1.24

1.32

1.41

1.50

1.59

1.69

1.79

0.67

0.72

0.77

0.83

0.89

0.95

1.02

1.09

1.89

2.00

2.12

Watts

1086

1158

1233

1312

1395

1481

1572

1666

625

672

723

776

832

891

953

1018

1764

1866

1973

Rpm

771

782

794

805

817

828

840

852

688

697

707

718

728

738

749

760

864

876

889

0.8

Bhp Watts Rpm

1.33

1.42

1.50

1.59

1.69

1.78

1.88

1.99

0.80

0.85

0.91

0.98

1.04

1.11

1.18

1.26

2.10

2.22

2.34

745

797

852

910

970

1034

1100

1170

1244

1320

1400

1484

1571

1662

1758

1857

1960

2067

2179

820

831

841

852

863

874

886

897

741

750

760

769

779

789

799

809

909

920

932

1.0

Bhp

1.50

1.59

1.68

1.78

1.87

1.98

2.08

2.20

0.93

0.99

1.05

1.12

1.19

1.26

1.34

1.42

2.31

2.43

2.56

Watts

1401

1483

1567

1656

1748

1844

1943

2048

866

923

982

1044

1109

1177

1249

1323

2155

2268

2384

AIRFLOW

CFM

2500

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

4000

4100

4200

4300

Rpm

846

856

866

876

886

897

791

799

808

817

827

836

907

918

929

940

951

962

973

1.2

Bhp

1.06

1.12

1.19

1.26

1.34

1.42

1.50

1.58

1.67

1.76

1.86

1.96

2.06

2.17

2.28

2.40

2.52

2.65

2.78

Watts

988

1049

1113

1179

1249

1322

1398

1477

1559

1645

1734

1827

1924

2025

2130

2238

2351

2468

2589

Rpm

890

899

909

919

929

939

837

845

854

863

872

881

949

959

970

980

991

1002

—

1.4

1.19

1.26

1.34

1.41

1.49

1.57

1.66

1.75

1.84

1.94

2.04

2.14

2.25

2.37

2.48

2.61

2.73

2.86

—

EXTERNAL STATIC PRESSURE (in. wg)

Bhp Watts Rpm

1112

1177

1245

1316

1390

1467

1547

1631

1718

1808

1902

2000

2101

2207

2316

2429

2547

2668

—

LEGEND

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

*Motor drive range: 840 to 1085 rpm. All other rpms require fieldsupplied drive.

989

999

1009

1019

—

—

—

932

941

950

960

969

979

881

889

897

905

914

923

1.6

Bhp

1.33

1.40

1.48

1.56

1.64

1.73

1.82

1.92

2.01

2.12

2.22

2.33

2.44

2.56

2.68

2.81

—

—

—

NOTES:

Watts

1236

1306

1378

1454

1532

1613

1698

1786

1878

1972

2071

2173

2279

2389

2502

2620

—

—

—

Rpm

972

980

989

998

1008

1017

922

930

938

946

954

963

1027

1036

1046

—

—

—

—

1.8

Bhp

1.46

1.54

1.62

1.71

1.80

1.89

1.98

2.08

2.19

2.29

2.40

2.52

2.63

2.76

2.88

—

—

—

—

Watts

1362

1436

1513

1592

1675

1761

1849

1942

2038

2137

2240

2347

2457

2571

2690

—

—

—

—

Rpm

962

969

977

985

993

1001

1010

1018

1027

1036

1045

1054

1063

—

—

—

—

—

—

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See page 23 for general fan performance notes.

2.0

Bhp

1.60

1.68

1.77

1.86

1.95

2.05

2.15

2.25

2.36

2.47

2.58

2.70

2.83

—

—

—

—

—

—

Watts

1490

1568

1648

1732

1819

1909

2002

2099

2199

2303

2410

2521

2636

—

—

—

—

—

—

— 26 —

AIRFLOW

CFM

3300

3400

3500

3600

3700

3800

3900

4000

2500

2600

2700

2800

2900

3000

3100

3200

4100

4200

4300

Table 18 — Fan Performance 551B102 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

Rpm

597

611

625

639

654

668

683

697

489

502

515

529

542

556

569

583

712

726

741

0.2

Bhp Watts Rpm

0.83

0.89

0.96

1.04

1.11

1.20

1.28

1.37

0.41

0.45

0.50

0.55

0.59

0.65

0.70

0.76

1.47

1.57

1.67

386

424

465

508

555

604

656

712

770

832

898

967

1040

1116

1197

1281

1370

1462

1559

661

674

687

700

713

726

739

753

564

576

587

599

611

623

636

648

766

780

794

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.00

1.07

1.14

1.22

1.31

1.39

1.48

1.58

0.54

0.59

0.64

0.69

0.74

0.80

0.86

0.93

1.68

1.79

1.89

506

548

594

642

693

748

805

865

929

996

1066

1140

1218

1299

1385

1474

1567

1665

1767

718

730

742

754

767

779

792

804

629

640

650

661

672

684

695

707

817

830

843

0.6

Bhp

1.17

1.24

1.32

1.41

1.50

1.59

1.69

1.79

0.67

0.72

0.77

0.83

0.89

0.95

1.02

1.09

1.89

2.00

2.12

Watts

1086

1158

1233

1312

1395

1481

1572

1666

625

672

723

776

832

891

953

1018

1764

1866

1973

Rpm

771

782

794

805

817

828

840

852

688

697

707

718

728

738

749

760

864

876

889

0.8

Bhp Watts Rpm

1.33

1.42

1.50

1.59

1.69

1.78

1.88

1.99

0.80

0.85

0.91

0.98

1.04

1.11

1.18

1.26

2.10

2.22

2.34

745

797

852

910

970

1034

1100

1170

1244

1320

1400

1484

1571

1662

1758

1857

1960

2067

2179

820

831

841

852

863

874

886

897

741

750

760

769

779

789

799

809

909

920

932

1.0

Bhp

1.50

1.59

1.68

1.78

1.87

1.98

2.08

2.20

0.93

0.99

1.05

1.12

1.19

1.26

1.34

1.42

2.31

2.43

2.56

Watts

1401

1483

1567

1656

1748

1844

1943

2048

866

923

982

1044

1109

1177

1249

1323

2155

2268

2384

AIRFLOW

CFM

2500

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

4000

4100

4200

4300

Rpm

846

856

866

876

886

897

791

799

808

817

827

836

907

918

929

940

951

962

973

1.2

Bhp

1.06

1.12

1.19

1.26

1.34

1.42

1.50

1.58

1.67

1.76

1.86

1.96

2.06

2.17

2.28

2.40

2.52

2.65

2.78

Watts

988

1049

1113

1179

1249

1322

1398

1477

1559

1645

1734

1827

1924

2025

2130

2238

2351

2468

2589

Rpm

890

899

909

919

929

939

837

845

854

863

872

881

949

959

970

980

991

1002

1013

1.4

1.19

1.26

1.34

1.41

1.49

1.57

1.66

1.75

1.84

1.94

2.04

2.14

2.25

2.37

2.48

2.61

2.73

2.86

3.00

EXTERNAL STATIC PRESSURE (in. wg)

Bhp Watts Rpm

1112

1177

1245

1316

1390

1467

1547

1631

1718

1808

1902

2000

2101

2207

2316

2429

2547

2668

2794

LEGEND

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

989

999

1009

1019

1029

1040

1050

932

941

950

960

969

979

881

889

897

905

914

923

1.6

Bhp

1.33

1.40

1.48

1.56

1.64

1.73

1.82

1.92

2.01

2.12

2.22

2.33

2.44

2.56

2.68

2.81

2.94

3.08

3.22

NOTES:

Watts

1236

1306

1378

1454

1532

1613

1698

1786

1878

1972

2071

2173

2279

2389

2502

2620

2743

2869

2999

Rpm

972

980

989

998

1008

1017

922

930

938

946

954

963

1027

1036

1046

1056

1066

1076

1087

1.8

Bhp

1.46

1.54

1.62

1.71

1.80

1.89

1.98

2.08

2.19

2.29

2.40

2.52

2.63

2.76

2.88

3.02

3.15

3.29

3.44

Watts

1362

1436

1513

1592

1675

1761

1849

1942

2038

2137

2240

2347

2457

2571

2690

2812

2939

3070

3205

Rpm

962

969

977

985

993

1001

1010

1018

1027

1036

1045

1054

1063

1073

1082

1092

1102

1112

1122

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 4.20.

3. See page 23 for general fan performance notes.

2.0

Bhp

1.60

1.68

1.77

1.86

1.95

2.05

2.15

2.25

2.36

2.47

2.58

2.70

2.83

2.95

3.09

3.22

3.36

3.51

3.66

Watts

1490

1568

1648

1732

1819

1909

2002

2099

2199

2303

2410

2521

2636

2755

2877

3004

3136

3271

3411

— 27 —

AIRFLOW

CFM

3800

3900

4000

4100

4200

4300

4400

4500

3000

3100

3200

3300

3400

3500

3600

3700

4600

4700

4800

4900

5000

Table 19 — Fan Performance 551B120 — Vertical Discharge Units; Standard Motor (Belt Drive*

Rpm

668

683

697

712

726

741

755

770

556

569

583

597

611

625

639

654

785

800

815

829

844

0.2

Bhp Watts Rpm

1.20

1.28

1.37

1.47

1.57

1.67

1.78

1.89

0.65

0.70

0.76

0.83

0.89

0.96

1.04

1.11

2.01

2.14

2.26

2.40

2.54

1116

1197

1281

1370

1462

1559

1660

1766

604

656

712

770

832

898

967

1040

1876

1991

2111

2235

2365

726

739

753

766

780

794

807

821

623

636

648

661

674

687

700

713

835

849

863

877

891

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.39

1.48

1.58

1.68

1.79

1.89

2.01

2.13

0.80

0.86

0.93

1.00

1.07

1.14

1.22

1.31

2.25

2.38

2.51

2.65

2.80

1299

1385

1474

1567

1665

1767

1873

1984

748

805

865

929

996

1066

1140

1218

2099

2219

2344

2473

2608

779

792

804

817

830

843

856

869

684

695

707

718

730

742

754

767

882

895

909

922

936

0.6

Bhp

1.59

1.69

1.79

1.89

2.00

2.12

2.23

2.36

0.95

1.02

1.09

1.17

1.24

1.32

1.41

1.50

2.49

2.62

2.76

2.91

3.06

Watts Rpm

1481

1572

1666

1764

1866

1973

2084

2200

891

953

1018

1086

1158

1233

1312

1395

2320

2445

2575

2709

2849

828

840

852

864

876

889

901

914

738

749

760

771

782

794

805

817

926

939

952

965

978

0.8

Bhp Watts Rpm

1.78

1.88

1.99

2.10

2.22

2.34

2.46

2.59

1.11

1.18

1.26

1.33

1.42

1.50

1.59

1.69

2.72

2.86

3.01

3.16

3.31

1662

1758

1857

1960

2067

2179

2295

2415

1034

1100

1170

1244

1320

1400

1484

1571

2541

2670

2805

2944

3089

874

886

897

909

920

932

944

956

789

799

809

820

831

841

852

863

968

980

993

1005

1018

1.0

Bhp

1.98

2.08

2.20

2.31

2.43

2.56

2.69

2.82

1.26

1.34

1.42

1.50

1.59

1.68

1.78

1.87

2.96

3.10

3.25

3.41

3.57

Watts

1844

1943

2048

2155

2268

2384

2505

2630

1177

1249

1323

1401

1483

1567

1656

1748

2760

2895

3034

3178

3328

AIRFLOW

CFM

4000

4100

4200

4300

4400

4500

4600

4700

4800

4900

5000

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

Rpm

940

951

962

973

985

996

1008

1020

1032

1044

—

836

846

856

866

876

886

897

907

918

929

LEGEND

1.2

Bhp

1.42

1.50

1.58

1.67

1.76

1.86

1.96

2.06

2.17

2.28

2.40

2.52

2.65

2.78

2.91

3.05

3.20

3.34

3.50

3.66

—

Watts

1322

1398

1477

1559

1645

1734

1827

1924

2025

2130

2238

2351

2468

2589

2715

2845

2979

3119

3263

3413

—

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

881

890

899

909

980

991

1002

1013

1024

1035

919

929

939

949

959

970

1046

1058

—

—

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

2.61

2.73

2.86

3.00

3.14

3.28

3.43

3.58

—

—

—

1.57

1.66

1.75

1.84

1.94

2.04

2.14

2.25

2.37

2.48

2429

2547

2668

2794

2924

3059

3199

3343

—

—

—

1467

1547

1631

1718

1808

1902

2000

2101

2207

2316

1019

1029

1040

1050

1061

1072

1083

—

—

—

—

923

932

941

950

960

969

979

989

999

1009

1.6

Bhp

1.73

1.82

1.92

2.01

2.12

2.22

2.33

2.44

2.56

2.68

2.81

2.94

3.08

3.22

3.36

3.51

3.67

—

—

—

—

Watts Rpm

2620

2743

2869

2999

3134

3274

3418

—

—

—

—

1613

1698

1786

1878

1972

2071

2173

2279

2389

2502

1056

1066

1076

1087

1097

—

—

—

—

—

—

963

972

980

989

998

1008

1017

1027

1036

1046

1.8

Bhp Watts Rpm

3.02

3.15

3.29

3.44

3.59

—

—

—

—

—

—

1.89

1.98

2.08

2.19

2.29

2.40

2.52

2.63

2.76

2.88

2812

2939

3070

3205

3345

—

—

—

—

—

—

1761

1849

1942

2038

2137

2240

2347

2457

2571

2690

1092

1102

1112

1122

—

—

—

—

—

—

—

1001

1010

1018

1027

1036

1045

1054

1063

1073

1082

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 3.70.

3. See page 23 for general fan performance notes.

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

3.22

3.36

3.51

3.66

—

—

—

—

—

—

—

2.05

2.15

2.25

2.36

2.47

2.58

2.70

2.83

2.95

3.09

Watts

3004

3136

3271

3411

—

—

—

—

—

—

—

1909

2002

2099

2199

2303

2410

2521

2636

2755

2877

— 28 —

AIRFLOW

CFM

3800

3900

4000

4100

4200

4300

4400

4500

3000

3100

3200

3300

3400

3500

3600

3700

4600

4700

4800

4900

5000

Table 20 — Fan Performance 551B120 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

Rpm

668

683

697

712

726

741

755

770

556

569

583

597

611

625

639

654

785

800

815

829

844

0.2

Bhp Watts Rpm

1.20

1.28

1.37

1.47

1.57

1.67

1.78

1.89

0.65

0.70

0.76

0.83

0.89

0.96

1.04

1.11

2.01

2.14

2.26

2.40

2.54

1116

1197

1281

1370

1462

1559

1660

1766

604

656

712

770

832

898

967

1040

1876

1991

2111

2235

2365

726

739

753

766

780

794

807

821

623

636

648

661

674

687

700

713

835

849

863

877

891

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.39

1.48

1.58

1.68

1.79

1.89

2.01

2.13

0.80

0.86

0.93

1.00

1.07

1.14

1.22

1.31

2.25

2.38

2.51

2.65

2.80

1299

1385

1474

1567

1665

1767

1873

1984

748

805

865

929

996

1066

1140

1218

2099

2219

2344

2473

2608

779

792

804

817

830

843

856

869

684

695

707

718

730

742

754

767

882

895

909

922

936

0.6

Bhp

1.59

1.69

1.79

1.89

2.00

2.12

2.23

2.36

0.95

1.02

1.09

1.17

1.24

1.32

1.41

1.50

2.49

2.62

2.76

2.91

3.06

Watts Rpm

1481

1572

1666

1764

1866

1973

2084

2200

891

953

1018

1086

1158

1233

1312

1395

2320

2445

2575

2709

2849

828

840

852

864

876

889

901

914

738

749

760

771

782

794

805

817

926

939

952

965

978

0.8

Bhp Watts Rpm

1.78

1.88

1.99

2.10

2.22

2.34

2.46

2.59

1.11

1.18

1.26

1.33

1.42

1.50

1.59

1.69

2.72

2.86

3.01

3.16

3.31

1662

1758

1857

1960

2067

2179

2295

2415

1034

1100

1170

1244

1320

1400

1484

1571

2541

2670

2805

2944

3089

874

886

897

909

920

932

944

956

789

799

809

820

831

841

852

863

968

980

993

1005

1018

1.0

Bhp

1.98

2.08

2.20

2.31

2.43

2.56

2.69

2.82

1.26

1.34

1.42

1.50

1.59

1.68

1.78

1.87

2.96

3.10

3.25

3.41

3.57

Watts

1844

1943

2048

2155

2268

2384

2505

2630

1177

1249

1323

1401

1483

1567

1656

1748

2760

2895

3034

3178

3328

AIRFLOW

CFM

4000

4100

4200

4300

4400

4500

4600

4700

4800

4900

5000

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

Rpm

940

951

962

973

985

996

1008

1020

1032

1044

1056

836

846

856

866

876

886

897

907

918

929

LEGEND

1.2

Bhp

1.42

1.50

1.58

1.67

1.76

1.86

1.96

2.06

2.17

2.28

2.40

2.52

2.65

2.78

2.91

3.05

3.20

3.34

3.50

3.66

3.82

Watts

1322

1398

1477

1559

1645

1734

1827

1924

2025

2130

2238

2351

2468

2589

2715

2845

2979

3119

3263

3413

3566

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

881

890

899

909

980

991

1002

1013

1024

1035

919

929

939

949

959

970

1046

1058

1069

1081

1093

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

2.61

2.73

2.86

3.00

3.14

3.28

3.43

3.58

3.74

3.91

4.08

1.57

1.66

1.75

1.84

1.94

2.04

2.14

2.25

2.37

2.48

2429

2547

2668

2794

2924

3059

3199

3343

3492

3646

3805

1467

1547

1631

1718

1808

1902

2000

2101

2207

2316

1019

1029

1040

1050

1061

1072

1083

1094

1105

1117

1128

923

932

941

950

960

969

979

989

999

1009

1.6

Bhp

1.73

1.82

1.92

2.01

2.12

2.22

2.33

2.44

2.56

2.68

2.81

2.94

3.08

3.22

3.36

3.51

3.67

3.83

3.99

4.16

4.34

Watts Rpm

2620

2743

2869

2999

3134

3274

3418

3567

3721

3880

4044

1613

1698

1786

1878

1972

2071

2173

2279

2389

2502

1056

1066

1076

1087

1097

1108

1118

1129

1140

1151

1162

963

972

980

989

998

1008

1017

1027

1036

1046

1.8

Bhp Watts Rpm

3.02

3.15

3.29

3.44

3.59

3.74

3.90

4.07

4.24

4.41

4.59

1.89

1.98

2.08

2.19

2.29

2.40

2.52

2.63

2.76

2.88

2812

2939

3070

3205

3345

3489

3638

3792

3950

4113

4282

1761

1849

1942

2038

2137

2240

2347

2457

2571

2690

1092

1102

1112

1122

1132

1142

1152

1163

1174

1184

1195

1001

1010

1018

1027

1036

1045

1054

1063

1073

1082

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 5.25.

3. See page 23 for general fan performance notes.

*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

3.22

3.36

3.51

3.66

3.81

3.97

4.14

4.31

4.48

4.66

4.85

2.05

2.15

2.25

2.36

2.47

2.58

2.70

2.83

2.95

3.09

Watts

3004

3136

3271

3411

3555

3704

3857

4016

4179

4347

4520

1909

2002

2099

2199

2303

2410

2521

2636

2755

2877

— 29 —

AIRFLOW

CFM

5300

5400

5500

5600

5700

5800

5900

6000

6100

6200

6300

4500

4600

4700

4800

4900

5000

5100

5200

3700

3800

3900

4000

4100

4200

4300

4400

Table 21 — Fan Performance 551B150 — Vertical Discharge Units; Standard Motor (Belt Drive)*

Rpm

889

904

920

935

950

965

980

995

1011

1026

1041

770

785

800

815

829

844

859

874

654

668

683

697

712

726

741

755

0.2

Bhp Watts Rpm

2.99

3.15

3.32

3.49

3.67

3.85

4.05

4.24

4.45

4.66

4.88

1.89

2.01

2.14

2.26

2.40

2.54

2.68

2.83

1.11

1.20

1.28

1.37

1.47

1.57

1.67

1.78

2784

2936

3092

3253

3421

3594

3773

3958

4149

4347

4550

1766

1876

1991

2111

2235

2365

2499

2640

1040

1116

1197

1281

1370

1462

1559

1660

934

949

963

977

992

1006

1021

1036

1050

1065

—

821

835

849

863

877

891

906

920

713

726

739

753

766

780

794

807

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

3.26

3.43

3.60

3.78

3.97

4.16

4.35

4.56

4.77

4.99

—

2.13

2.25

2.38

2.51

2.65

2.80

2.95

3.10

1.31

1.39

1.48

1.58

1.68

1.79

1.89

2.01

3042

3198

3359

3525

3698

3876

4060

4250

4446

4649

—

1984

2099

2219

2344

2473

2608

2747

2892

1218

1299

1385

1474

1567

1665

1767

1873

977

990

1004

1018

1032

1046

1060

1074

1088

—

—

869

882

895

909

922

936

949

963

767

779

792

804

817

830

843

856

0.6

Bhp

3.54

3.71

3.89

4.07

4.26

4.46

4.66

4.87

5.09

—

—

2.36

2.49

2.62

2.76

2.91

3.06

3.21

3.37

1.50

1.59

1.69

1.79

1.89

2.00

2.12

2.23

Watts Rpm

3298

3459

3625

3796

3974

4157

4346

4541

4742

—

—

2200

2320

2445

2575

2709

2849

2994

3143

1395

1481

1572

1666

1764

1866

1973

2084

1017

1030

1044

1057

1070

1084

1098

1111

—

—

—

914

926

939

952

965

978

991

1004

817

828

840

852

864

876

889

901

0.8

Bhp Watts Rpm

3.81

3.99

4.17

4.36

4.56

4.76

4.97

5.18

—

—

—

2.59

2.72

2.86

3.01

3.16

3.31

3.47

3.64

1.69

1.78

1.88

1.99

2.10

2.22

2.34

2.46

3553

3719

3890

4066

4249

4436

4630

4831

—

—

—

2415

2541

2670

2805

2944

3089

3238

3393

1571

1662

1758

1857

1960

2067

2179

2295

1056

1068

1081

1094

1107

1120

—

—

—

—

—

956

968

980

993

1005

1018

1030

1043

863

874

886

897

909

920

932

944

1.0

Bhp

4.08

4.27

4.45

4.65

4.85

5.06

—

—

—

—

—

2.82

2.96

3.10

3.25

3.41

3.57

3.73

3.91

1.87

1.98

2.08

2.20

2.31

2.43

2.56

2.69

Watts

3807

3977

4153

4335

4522

4715

—

—

—

—

—

2630

2760

2895

3034

3178

3328

3483

3642

1748

1844

1943

2048

2155

2268

2384

2505

AIRFLOW

CFM

4700

4800

4900

5000

5100

5200

5300

5400

5500

5600

5700

5800

3700

3800

3900

4000

4100

4200

4300

4400

4500

4600

5900

6000

6100

6200

6300

Rpm

1020

1032

1044

1056

1068

1080

1093

1105

1118

1130

—

—

907

918

929

940

951

962

973

985

996

1008

—

—

—

—

—

LEGEND

1.2

Bhp

2.06

2.17

2.28

2.40

2.52

2.65

2.78

2.91

3.05

3.20

3.34

3.50

3.66

3.82

4.00

4.17

4.35

4.54

4.74

4.94

—

—

—

—

—

—

—

Watts

1924

2025

2130

2238

2351

2468

2589

2715

2845

2979

3119

3263

3413

3566

3726

3891

4060

4236

4417

4603

—

—

—

—

—

—

—

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

949

959

970

980

991

1002

1013

1024

1035

1046

1058

1069

1081

1093

1104

1116

1128

1140

1152

—

—

—

—

—

—

—

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

—

—

—

—

—

3.58

3.74

3.91

4.08

4.26

4.44

4.63

4.82

5.02

—

—

—

2.25

2.37

2.48

2.61

2.73

2.86

3.00

3.14

3.28

3.43

3343

3492

3646

3805

3969

4139

4314

4494

4679

—

—

—

2101

2207

2316

2429

2547

2668

2794

2924

3059

3199

—

—

—

—

—

1094

1105

1117

1128

1139

1151

1163

1174

—

—

—

—

989

999

1009

1019

1029

1040

1050

1061

1072

1083

—

—

—

—

—

1.6

Bhp

2.44

2.56

2.68

2.81

2.94

3.08

3.22

3.36

3.51

3.67

3.83

3.99

4.16

4.34

4.52

4.70

4.90

5.10

—

—

—

—

—

—

—

—

—

Watts Rpm

3567

3721

3880

4044

4212

4386

4566

4751

—

—

—

—

2279

2389

2502

2620

2743

2869

2999

3134

3274

3418

—

—

—

—

—

1129

1140

1151

1162

1173

1185

1196

—

—

—

—

—

1027

1036

1046

1056

1066

1076

1087

1097

1108

1118

—

—

—

—

—

1.8

Bhp Watts Rpm

4.07

4.24

4.41

4.59

4.78

4.97

5.17

—

—

—

—

—

2.63

2.76

2.88

3.02

3.15

3.29

3.44

3.59

3.74

3.90

—

—

—

—

—

3792

3950

4113

4282

4456

4634

4819

—

—

—

—

—

2457

2571

2690

2812

2939

3070

3205

3345

3489

3638

—

—

—

—

—

—

—

—

—

—

—

1163

1174

1184

1195

1206

—

1063

1073

1082

1092

1102

1112

1122

1132

1142

1152

—

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 5.25.

3. See page 23 for general fan performance notes.

*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

—

—

—

—

—

—

4.31

4.48

4.66

4.85

5.04

—

2.83

2.95

3.09

3.22

3.36

3.51

3.66

3.81

3.97

4.14

—

—

—

—

—

Watts

—

—

—

—

—

—

4016

4179

4347

4520

4699

—

2636

2755

2877

3004

3136

3271

3411

3555

3704

3857

—

—

—

—

—

— 30 —

AIRFLOW

CFM

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

2250

2300

2400

2500

2550

2600

2700

2800

Table 22 — Fan Performance 551B090 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

Rpm

544

557

570

583

596

609

622

635

649

655

465

471

483

495

501

507

519

532

0.2

Bhp Watts Rpm

0.75

0.82

0.88

0.95

1.03

1.10

1.19

1.27

1.36

1.41

0.43

0.45

0.49

0.54

0.56

0.59

0.64

0.70

402

421

461

503

526

549

597

649

703

761

823

888

957

1030

1106

1187

1272

1316

625

637

648

660

672

684

696

708

720

726

555

560

571

581

587

592

603

614

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.01

1.08

1.16

1.23

1.32

1.40

1.49

1.59

1.69

1.74

0.64

0.66

0.71

0.77

0.79

0.82

0.88

0.95

596

618

665

715

740

767

823

882

944

1009

1079

1151

1228

1308

1392

1481

1573

1621

695

705

716

727

738

749

760

771

783

789

629

634

644

654

659

664

674

684

0.6

Bhp

1.28

1.36

1.44

1.53

1.61

1.71

1.81

1.91

2.02

2.07

0.86

0.89

0.94

1.01

1.04

1.07

1.14

1.21

Watts

1194

1266

1342

1422

1506

1593

1685

1781

1881

1932

802

828

881

937

967

996

1059

1125

Rpm

756

766

776

787

797

808

818

829

840

845

694

699

708

717

722

727

737

746

0.8

Bhp Watts Rpm

1.56

1.64

1.73

1.82

1.92

2.02

2.13

2.24

2.35

2.41

1.10

1.13

1.19

1.26

1.29

1.33

1.40

1.48

1021

1050

1109

1171

1204

1237

1306

1378

1453

1533

1615

1702

1792

1887

1985

2088

2195

2250

812

822

831

841

851

861

872

882

892

897

753

757

766

775

779

784

793

803

1.0

Bhp

1.85

1.94

2.03

2.13

2.24

2.35

2.46

2.58

2.70

2.76

1.34

1.38

1.45

1.52

1.56

1.60

1.68

1.76

Watts

1723

1808

1897

1991

2088

2188

2294

2403

2517

2575

1252

1283

1348

1416

1452

1488

1563

1641

AIRFLOW

CFM

2250

2300

2400

2500

2550

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

Rpm

806

811

819

828

832

836

845

854

864

873

882

892

901

911

921

—

—

—

LEGEND

1.2

Bhp

1.60

1.64

1.71

1.79

1.83

1.88

1.96

2.05

2.15

2.24

2.35

2.45

2.56

2.68

2.80

—

—

—

Watts

1494

1528

1599

1672

1710

1749

1830

1914

2002

2093

2189

2288

2391

2499

2610

—

—

—

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

856

860

868

877

881

885

894

903

912

921

930

939

948

—

—

—

—

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

1.87

1.91

1.99

2.08

2.12

2.17

2.26

2.36

2.46

2.56

2.67

2.78

2.90

—

—

—

—

—

1747

1784

1859

1938

1979

2021

2107

2197

2290

2388

2489

2595

2704

—

—

—

—

—

903

907

915

923

927

931

940

948

957

966

—

—

—

—

—

—

—

—

1.6

Bhp

2.15

2.20

2.28

2.37

2.42

2.47

2.57

2.67

2.77

2.89

—

—

—

—

—

—

—

—

Watts

2009

2048

2129

2214

2258

2302

2394

2488

2587

2691

—

—

—

—

—

—

—

—

Rpm

947

950

958

966

971

975

983

—

—

—

—

—

—

—

—

—

—

—

1.8

Bhp Watts Rpm

2.45

2.49

2.58

2.68

2.73

2.78

2.88

—

—

—

—

—

—

—

—

—

—

—

2282

2323

2410

2499

2545

2592

2689

—

—

—

—

—

—

—

—

—

—

—

988

992

1000

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See page 23 for general fan performance notes.

*Motor drive range: 840 to 1085 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

2.75

2.80

2.89

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Watts

2564

2607

2698

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

— 31 —

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

2250

2300

2400

2500

2550

2600

2700

2800

AIRFLOW

CFM

Table 23 — Fan Performance 551B090 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

Rpm

544

557

570

583

596

609

622

635

649

655

465

471

483

495

501

507

519

532

0.2

Bhp Watts Rpm

0.75

0.82

0.88

0.95

1.03

1.10

1.19

1.27

1.36

1.41

0.43

0.45

0.49

0.54

0.56

0.59

0.64

0.70

402

421

461

503

526

549

597

649

703

761

823

888

957

1030

1106

1187

1272

1316

625

637

648

660

672

684

696

708

720

726

555

560

571

581

587

592

603

614

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.01

1.08

1.16

1.23

1.32

1.40

1.49

1.59

1.69

1.74

0.64

0.66

0.71

0.77

0.79

0.82

0.88

0.95

596

618

665

715

740

767

823

882

944

1009

1079

1151

1228

1308

1392

1481

1573

1621

695

705

716

727

738

749

760

771

783

789

629

634

644

654

659

664

674

684

0.6

Bhp

1.28

1.36

1.44

1.53

1.61

1.71

1.81

1.91

2.02

2.07

0.86

0.89

0.94

1.01

1.04

1.07

1.14

1.21

Watts

1194

1266

1342

1422

1506

1593

1685

1781

1881

1932

802

828

881

937

967

996

1059

1125

Rpm

756

766

776

787

797

808

818

829

840

845

694

699

708

717

722

727

737

746

0.8

Bhp Watts Rpm

1.56

1.64

1.73

1.82

1.92

2.02

2.13

2.24

2.35

2.41

1.10

1.13

1.19

1.26

1.29

1.33

1.40

1.48

1021

1050

1109

1171

1204

1237

1306

1378

1453

1533

1615

1702

1792

1887

1985

2088

2195

2250

812

822

831

841

851

861

872

882

892

897

753

757

766

775

779

784

793

803

1.0

Bhp

1.85

1.94

2.03

2.13

2.24

2.35

2.46

2.58

2.70

2.76

1.34

1.38

1.45

1.52

1.56

1.60

1.68

1.76

Watts

1723

1808

1897

1991

2088

2188

2294

2403

2517

2575

1252

1283

1348

1416

1452

1488

1563

1641

AIRFLOW

CFM

2250

2300

2400

2500

2550

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3750

Rpm

806

811

819

828

832

836

845

854

864

873

882

892

901

911

921

931

941

946

LEGEND

1.2

Bhp

1.60

1.64

1.71

1.79

1.83

1.88

1.96

2.05

2.15

2.24

2.35

2.45

2.56

2.68

2.80

2.92

3.05

3.12

Watts

1494

1528

1599

1672

1710

1749

1830

1914

2002

2093

2189

2288

2391

2499

2610

2726

2847

2908

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

856

860

868

877

881

885

894

903

912

921

930

939

948

958

967

977

987

992

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

1.87

1.91

1.99

2.08

2.12

2.17

2.26

2.36

2.46

2.56

2.67

2.78

2.90

3.02

3.15

3.28

3.41

3.48

1747

1784

1859

1938

1979

2021

2107

2197

2290

2388

2489

2595

2704

2817

2935

3057

3184

3249

903

907

915

923

927

931

940

948

957

966

975

984

993

1002

1011

1021

1030

1035

1.6

Bhp

2.15

2.20

2.28

2.37

2.42

2.47

2.57

2.67

2.77

2.89

3.00

3.12

3.24

3.37

3.50

3.64

3.78

3.86

Watts

2009

2048

2129

2214

2258

2302

2394

2488

2587

2691

2798

2909

3024

3144

3268

3396

3529

3597

Rpm

947

950

958

966

971

975

983

991

1000

1008

1017

1026

1035

1044

1053

1062

1071

—

1.8

Bhp Watts Rpm

2.45

2.49

2.58

2.68

2.73

2.78

2.88

2.99

3.10

3.22

3.34

3.47

3.60

3.73

3.87

4.01

4.16

—

2282

2323

2410

2499

2545

2592

2689

2790

2894

3003

3115

3233

3353

3479

3608

3743

3882

—

988

992

1000

1008

1012

1016

1024

1032

1041

1049

1057

1066

1075

1084

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 4.20.

3. See page 23 for general fan performance notes.

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

2.75

2.80

2.89

3.00

3.05

3.10

3.21

3.32

3.44

3.56

3.69

3.82

3.96

4.10

—

—

—

—

Watts

2564

2607

2698

2793

2842

2891

2993

3099

3209

3323

3441

3564

3690

3821

—

—

—

—

— 32 —

AIRFLOW

CFM

3300

3400

3500

3600

3700

3800

3900

4000

2500

2600

2700

2800

2900

3000

3100

3200

4100

4200

4300

Table 24 — Fan Performance 551B102 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

Rpm

562

575

588

601

614

628

641

655

462

474

486

498

510

523

536

549

668

682

696

0.2

Bhp Watts Rpm

0.74

0.80

0.86

0.93

1.00

1.07

1.15

1.23

0.37

0.41

0.45

0.49

0.53

0.58

0.63

0.68

1.31

1.40

1.49

348

381

417

456

497

541

587

637

689

744

802

864

929

997

1069

1144

1223

1305

1392

626

637

649

661

673

685

697

709

541

551

561

571

581

592

603

614

722

734

747

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

0.90

0.96

1.03

1.10

1.17

1.25

1.33

1.42

0.50

0.54

0.58

0.63

0.68

0.73

0.78

0.84

1.51

1.60

1.70

467

505

545

587

632

680

730

783

839

898

961

1026

1095

1167

1243

1322

1405

1492

1582

686

696

707

717

728

739

750

761

614

622

630

639

648

657

666

676

773

784

796

0.6

Bhp

1.07

1.14

1.21

1.28

1.36

1.44

1.53

1.61

0.64

0.68

0.73

0.78

0.83

0.88

0.94

1.00

1.71

1.80

1.91

Watts

996

1059

1125

1194

1267

1343

1423

1506

594

635

679

725

774

825

879

936

1593

1683

1777

Rpm

743

752

762

771

781

791

801

812

681

688

695

702

710

718

726

735

822

833

844

0.8

Bhp Watts Rpm

1.24

1.31

1.39

1.47

1.55

1.64

1.72

1.82

0.78

0.83

0.88

0.93

0.99

1.05

1.11

1.17

1.92

2.02

2.12

728

773

820

870

922

977

1035

1096

1159

1226

1296

1369

1445

1525

1608

1695

1786

1880

1979

798

806

815

823

832

841

850

860

744

750

756

762

768

775

783

790

870

880

890

1.0

Bhp

1.42

1.50

1.58

1.66

1.75

1.84

1.93

2.03

0.93

0.98

1.04

1.09

1.15

1.22

1.28

1.35

2.13

2.23

2.34

Watts

1328

1398

1472

1548

1629

1712

1799

1890

868

916

967

1020

1076

1135

1196

1260

1984

2082

2184

AIRFLOW

CFM

2500

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

4000

4100

4200

4300

Rpm

837

843

850

858

865

873

804

809

813

819

824

830

881

889

898

907

916

925

934

1.2

Bhp

1.09

1.14

1.20

1.26

1.32

1.39

1.46

1.53

1.61

1.69

1.77

1.86

1.95

2.04

2.14

2.24

2.35

2.45

2.57

Watts

1013

1065

1119

1176

1235

1298

1363

1431

1502

1576

1653

1733

1816

1904

1995

2089

2187

2289

2395

Rpm

889

894

901

907

914

921

861

864

869

873

878

883

928

936

944

952

960

969

978

1.4

1.25

1.31

1.37

1.43

1.50

1.57

1.65

1.72

1.80

1.88

1.97

2.06

2.16

2.25

2.35

2.46

2.57

2.68

2.80

EXTERNAL STATIC PRESSURE (in. wg)

Bhp Watts Rpm

1164

1219

1277

1337

1400

1466

1534

1606

1680

1758

1838

1922

2010

2100

2195

2293

2395

2500

2610

LEGEND

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

*Motor drive range: 840 to 1085 rpm. All other rpms require fieldsupplied drive.

974

981

988

996

1004

—

—

938

944

949

955

961

967

915

918

921

925

929

934

1.6

Bhp

1.41

1.48

1.54

1.61

1.68

1.76

1.83

1.91

2.00

2.09

2.18

2.27

2.37

2.47

2.57

2.68

2.80

—

—

NOTES:

Watts

1319

1378

1439

1503

1569

1638

1710

1785

1863

1944

2029

2116

2207

2302

2399

2501

2607

—

—

Rpm

986

991

996

1001

1007

1012

967

969

972

975

978

982

1019

1025

1032

—

—

—

—

1.8

Bhp

1.59

1.65

1.72

1.79

1.87

1.95

2.03

2.11

2.20

2.29

2.38

2.48

2.58

2.69

2.80

—

—

—

—

Watts

1479

1541

1606

1673

1742

1815

1891

1969

2051

2135

2223

2314

2409

2507

2608

—

—

—

—

Rpm

1017

1018

1021

1023

1026

1029

1033

1037

1041

1046

1051

1056

1062

—

—

—

—

—

—

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See page 23 for general fan performance notes.

2.0

Bhp

1.76

1.83

1.90

1.98

2.06

2.14

2.23

2.31

2.40

2.50

2.60

2.70

2.80

—

—

—

—

—

—

Watts

1642

1708

1776

1847

1920

1996

2075

2157

2242

2331

2422

2516

2615

—

—

—

—

—

—

— 33 —

3300

3400

3500

3600

3700

3800

3900

4000

2500

2600

2700

2800

2900

3000

3100

3200

4100

4200

4300

AIRFLOW

CFM

Table 25 — Fan Performance 551B102 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

Rpm

562

575

588

601

614

628

641

655

462

474

486

498

510

523

536

549

668

682

696

0.2

Bhp Watts Rpm

0.74

0.80

0.86

0.93

1.00

1.07

1.15

1.23

0.37

0.41

0.45

0.49

0.53

0.58

0.63

0.68

1.31

1.40

1.49

348

381

417

456

497

541

587

637

689

744

802

864

929

997

1069

1144

1223

1305

1392

626

637

649

661

673

685

697

709

541

551

561

571

581

592

603

614

722

734

747

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

0.90

0.96

1.03

1.10

1.17

1.25

1.33

1.42

0.50

0.54

0.58

0.63

0.68

0.73

0.78

0.84

1.51

1.60

1.70

467

505

545

587

632

680

730

783

839

898

961

1026

1095

1167

1243

1322

1405

1492

1582

686

696

707

717

728

739

750

761

614

622

630

639

648

657

666

676

773

784

796

0.6

Bhp

1.07

1.14

1.21

1.28

1.36

1.44

1.53

1.61

0.64

0.68

0.73

0.78

0.83

0.88

0.94

1.00

1.71

1.80

1.91

Watts

996

1059

1125

1194

1267

1343

1423

1506

594

635

679

725

774

825

879

936

1593

1683

1777

Rpm

743

752

762

771

781

791

801

812

681

688

695

702

710

718

726

735

822

833

844

0.8

Bhp Watts Rpm

1.24

1.31

1.39

1.47

1.55

1.64

1.72

1.82

0.78

0.83

0.88

0.93

0.99

1.05

1.11

1.17

1.92

2.02

2.12

728

773

820

870

922

977

1035

1096

1159

1226

1296

1369

1445

1525

1608

1695

1786

1880

1979

798

806

815

823

832

841

850

860

744

750

756

762

768

775

783

790

870

880

890

1.0

Bhp

1.42

1.50

1.58

1.66

1.75

1.84

1.93

2.03

0.93

0.98

1.04

1.09

1.15

1.22

1.28

1.35

2.13

2.23

2.34

Watts

1328

1398

1472

1548

1629

1712

1799

1890

868

916

967

1020

1076

1135

1196

1260

1984

2082

2184

AIRFLOW

CFM

2500

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

4000

4100

4200

4300

Rpm

837

843

850

858

865

873

804

809

813

819

824

830

881

889

898

907

916

925

934

1.2

Bhp

1.09

1.14

1.20

1.26

1.32

1.39

1.46

1.53

1.61

1.69

1.77

1.86

1.95

2.04

2.14

2.24

2.35

2.45

2.57

Watts

1013

1065

1119

1176

1235

1298

1363

1431

1502

1576

1653

1733

1816

1904

1995

2089

2187

2289

2395

Rpm

889

894

901

907

914

921

861

864

869

873

878

883

928

936

944

952

960

969

978

1.4

1.25

1.31

1.37

1.43

1.50

1.57

1.65

1.72

1.80

1.88

1.97

2.06

2.16

2.25

2.35

2.46

2.57

2.68

2.80

EXTERNAL STATIC PRESSURE (in. wg)

Bhp Watts Rpm

1164

1219

1277

1337

1400

1466

1534

1606

1680

1758

1838

1922

2010

2100

2195

2293

2395

2500

2610

LEGEND

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

974

981

988

996

1004

1011

1020

938

944

949

955

961

967

915

918

921

925

929

934

1.6

Bhp

1.41

1.48

1.54

1.61

1.68

1.76

1.83

1.91

2.00

2.09

2.18

2.27

2.37

2.47

2.57

2.68

2.80

2.91

3.03

NOTES:

Watts

1319

1378

1439

1503

1569

1638

1710

1785

1863

1944

2029

2116

2207

2302

2399

2501

2607

2716

2828

Rpm

986

991

996

1001

1007

1012

967

969

972

975

978

982

1019

1025

1032

1038

1046

1053

1061

1.8

Bhp

1.59

1.65

1.72

1.79

1.87

1.95

2.03

2.11

2.20

2.29

2.38

2.48

2.58

2.69

2.80

2.91

3.03

3.15

3.27

Watts

1479

1541

1606

1673

1742

1815

1891

1969

2051

2135

2223

2314

2409

2507

2608

2713

2822

2935

3052

Rpm

1017

1018

1021

1023

1026

1029

1033

1037

1041

1046

1051

1056

1062

1068

1074

1080

1087

1094

1101

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 4.20.

3. See page 23 for general fan performance notes.

2.0

Bhp

1.76

1.83

1.90

1.98

2.06

2.14

2.23

2.31

2.40

2.50

2.60

2.70

2.80

2.91

3.03

3.14

3.26

3.39

3.52

Watts

1642

1708

1776

1847

1920

1996

2075

2157

2242

2331

2422

2516

2615

2716

2821

2930

3042

3159

3279

— 34 —

AIRFLOW

CFM

3800

3900

4000

4100

4200

4300

4400

4500

3000

3100

3200

3300

3400

3500

3600

3700

4600

4700

4800

4900

5000

Table 26 — Fan Performance 551B120 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

Rpm

628

641

655

668

682

696

710

723

523

536

549

562

575

588

601

614

737

751

765

779

793

0.2

Bhp Watts Rpm

1.07

1.15

1.23

1.31

1.40

1.49

1.59

1.69

0.58

0.63

0.68

0.74

0.80

0.86

0.93

1.00

1.80

1.91

2.02

2.14

2.26

997

1069

1144

1223

1305

1392

1482

1577

541

587

637

689

744

802

864

929

1675

1778

1885

1996

2112

685

697

709

722

734

747

760

773

592

603

614

626

637

649

661

673

785

798

812

825

838

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.25

1.33

1.42

1.51

1.60

1.70

1.80

1.90

0.73

0.78

0.84

0.90

0.96

1.03

1.10

1.17

2.01

2.13

2.25

2.37

2.50

1167

1243

1322

1405

1492

1582

1677

1775

680

730

783

839

898

961

1026

1095

1877

1984

2095

2210

2330

739

750

761

773

784

796

808

820

657

666

676

686

696

707

717

728

832

844

856

869

881

0.6

Bhp

1.44

1.53

1.61

1.71

1.80

1.91

2.01

2.12

0.88

0.94

1.00

1.07

1.14

1.21

1.28

1.36

2.24

2.35

2.48

2.61

2.74

Watts Rpm

1343

1423

1506

1593

1683

1777

1876

1978

825

879

936

996

1059

1125

1194

1267

2085

2195

2310

2430

2554

791

801

812

822

833

844

855

866

718

726

735

743

752

762

771

781

877

889

900

912

923

0.8

Bhp Watts Rpm

1.64

1.72

1.82

1.92

2.02

2.12

2.23

2.35

1.05

1.11

1.17

1.24

1.31

1.39

1.47

1.55

2.46

2.59

2.71

2.85

2.98

1525

1608

1695

1786

1880

1979

2081

2187

977

1035

1096

1159

1226

1296

1369

1445

2297

2412

2531

2654

2782

841

850

860

870

880

890

900

910

775

783

790

798

806

815

823

832

921

932

942

953

965

1.0

Bhp

1.84

1.93

2.03

2.13

2.23

2.34

2.46

2.57

1.22

1.28

1.35

1.42

1.50

1.58

1.66

1.75

2.70

2.82

2.95

3.09

3.23

Watts

1712

1799

1890

1984

2082

2184

2290

2400

1135

1196

1260

1328

1398

1472

1548

1629

2514

2633

2756

2883

3014

AIRFLOW

CFM

4000

4100

4200

4300

4400

4500

4600

4700

4800

4900

5000

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

Rpm

907

916

925

934

944

954

963

974

984

994

1005

830

837

843

850

858

865

873

881

889

898

LEGEND

1.2

Bhp

1.39

1.46

1.53

1.61

1.69

1.77

1.86

1.95

2.04

2.14

2.24

2.35

2.45

2.57

2.69

2.81

2.93

3.07

3.20

3.34

3.49

Watts

1298

1363

1431

1502

1576

1653

1733

1816

1904

1995

2089

2187

2289

2395

2504

2618

2736

2858

2985

3116

3251

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

883

889

894

901

952

960

969

978

986

996

907

914

921

928

936

944

1005

1014

1024

1034

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

2.46

2.57

2.68

2.80

2.92

3.05

3.18

3.31

3.45

3.60

—

1.57

1.65

1.72

1.80

1.88

1.97

2.06

2.16

2.25

2.35

2293

2395

2500

2610

2723

2840

2962

3088

3219

3353

—

1466

1534

1606

1680

1758

1838

1922

2010

2100

2195

996

1004

1011

1020

1028

1037

1045

1054

—

—

—

934

938

944

949

955

961

967

974

981

988

1.6

Bhp

1.76

1.83

1.91

2.00

2.09

2.18

2.27

2.37

2.47

2.57

2.68

2.80

2.91

3.03

3.16

3.29

3.42

3.56

—

—

—

Watts Rpm

2501

2607

2716

2828

2946

3067

3192

3322

—

—

—

1638

1710

1785

1863

1944

2029

2116

2207

2302

2399

1038

1046

1053

1061

1068

1076

1085

—

—

—

—

982

986

991

996

1001

1007

1012

1019

1025

1032

1.8

Bhp Watts Rpm

2.91

3.03

3.15

3.27

3.40

3.54

3.67

—

—

—

—

1.95

2.03

2.11

2.20

2.29

2.38

2.48

2.58

2.69

2.80

2713

2822

2935

3052

3173

3297

3426

—

—

—

—

1815

1891

1969

2051

2135

2223

2314

2409

2507

2608

1080

1087

1094

1101

1108

—

—

—

—

—

—

1029

1033

1037

1041

1046

1051

1056

1062

1068

1074

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 3.70.

3. See page 23 for general fan performance notes.

*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

3.14

3.26

3.39

3.52

3.65

—

—

—

—

—

—

2.14

2.23

2.31

2.40

2.50

2.60

2.70

2.80

2.91

3.03

Watts

2930

3042

3159

3279

3403

—

—

—

—

—

—

1996

2075

2157

2242

2331

2422

2516

2615

2716

2821

— 35 —

3800

3900

4000

4100

4200

4300

4400

4500

3000

3100

3200

3300

3400

3500

3600

3700

4600

4700

4800

4900

5000

AIRFLOW

CFM

Table 27 — Fan Performance 551B120 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

Rpm

628

641

655

668

682

696

710

723

523

536

549

562

575

588

601

614

737

751

765

779

793

0.2

Bhp Watts Rpm

1.07

1.15

1.23

1.31

1.40

1.49

1.59

1.69

0.58

0.63

0.68

0.74

0.80

0.86

0.93

1.00

1.80

1.91

2.02

2.14

2.26

997

1069

1144

1223

1305

1392

1482

1577

541

587

637

689

744

802

864

929

1675

1778

1885

1996

2112

685

697

709

722

734

747

760

773

592

603

614

626

637

649

661

673

785

798

812

825

838

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

1.25

1.33

1.42

1.51

1.60

1.70

1.80

1.90

0.73

0.78

0.84

0.90

0.96

1.03

1.10

1.17

2.01

2.13

2.25

2.37

2.50

1167

1243

1322

1405

1492

1582

1677

1775

680

730

783

839

898

961

1026

1095

1877

1984

2095

2210

2330

739

750

761

773

784

796

808

820

657

666

676

686

696

707

717

728

832

844

856

869

881

0.6

Bhp

1.44

1.53

1.61

1.71

1.80

1.91

2.01

2.12

0.88

0.94

1.00

1.07

1.14

1.21

1.28

1.36

2.24

2.35

2.48

2.61

2.74

Watts Rpm

1343

1423

1506

1593

1683

1777

1876

1978

825

879

936

996

1059

1125

1194

1267

2085

2195

2310

2430

2554

791

801

812

822

833

844

855

866

718

726

735

743

752

762

771

781

877

889

900

912

923

0.8

Bhp Watts Rpm

1.64

1.72

1.82

1.92

2.02

2.12

2.23

2.35

1.05

1.11

1.17

1.24

1.31

1.39

1.47

1.55

2.46

2.59

2.71

2.85

2.98

1525

1608

1695

1786

1880

1979

2081

2187

977

1035

1096

1159

1226

1296

1369

1445

2297

2412

2531

2654

2782

841

850

860

870

880

890

900

910

775

783

790

798

806

815

823

832

921

932

942

953

965

1.0

Bhp

1.84

1.93

2.03

2.13

2.23

2.34

2.46

2.57

1.22

1.28

1.35

1.42

1.50

1.58

1.66

1.75

2.70

2.82

2.95

3.09

3.23

Watts

1712

1799

1890

1984

2082

2184

2290

2400

1135

1196

1260

1328

1398

1472

1548

1629

2514

2633

2756

2883

3014

AIRFLOW

CFM

4000

4100

4200

4300

4400

4500

4600

4700

4800

4900

5000

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

Rpm

907

916

925

934

944

954

963

974

984

994

1005

830

837

843

850

858

865

873

881

889

898

LEGEND

1.2

Bhp

1.39

1.46

1.53

1.61

1.69

1.77

1.86

1.95

2.04

2.14

2.24

2.35

2.45

2.57

2.69

2.81

2.93

3.07

3.20

3.34

3.49

Watts

1298

1363

1431

1502

1576

1653

1733

1816

1904

1995

2089

2187

2289

2395

2504

2618

2736

2858

2985

3116

3251

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

883

889

894

901

952

960

969

978

986

996

907

914

921

928

936

944

1005

1014

1024

1034

1044

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

2.46

2.57

2.68

2.80

2.92

3.05

3.18

3.31

3.45

3.60

3.74

1.57

1.65

1.72

1.80

1.88

1.97

2.06

2.16

2.25

2.35

2293

2395

2500

2610

2723

2840

2962

3088

3219

3353

3492

1466

1534

1606

1680

1758

1838

1922

2010

2100

2195

996

1004

1011

1020

1028

1037

1045

1054

1063

1073

1082

934

938

944

949

955

961

967

974

981

988

1.6

Bhp

1.76

1.83

1.91

2.00

2.09

2.18

2.27

2.37

2.47

2.57

2.68

2.80

2.91

3.03

3.16

3.29

3.42

3.56

3.71

3.85

4.01

Watts Rpm

2501

2607

2716

2828

2946

3067

3192

3322

3456

3594

3737

1638

1710

1785

1863

1944

2029

2116

2207

2302

2399

1038

1046

1053

1061

1068

1076

1085

1093

1102

1111

1119

982

986

991

996

1001

1007

1012

1019

1025

1032

1.8

Bhp Watts Rpm

2.91

3.03

3.15

3.27

3.40

3.54

3.67

3.82

3.96

4.12

4.27

1.95

2.03

2.11

2.20

2.29

2.38

2.48

2.58

2.69

2.80

2713

2822

2935

3052

3173

3297

3426

3560

3697

3839

3986

1815

1891

1969

2051

2135

2223

2314

2409

2507

2608

1080

1087

1094

1101

1108

1115

1123

1131

1139

1148

1156

1029

1033

1037

1041

1046

1051

1056

1062

1068

1074

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 5.25.

3. See page 23 for general fan performance notes.

*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

3.14

3.26

3.39

3.52

3.65

3.79

3.93

4.08

4.23

4.38

4.55

2.14

2.23

2.31

2.40

2.50

2.60

2.70

2.80

2.91

3.03

Watts

2930

3042

3159

3279

3403

3531

3664

3801

3943

4088

4238

1996

2075

2157

2242

2331

2422

2516

2615

2716

2821

— 36 —

AIRFLOW

CFM

5300

5400

5500

5600

5700

5800

5900

6000

6100

6200

6300

4500

4600

4700

4800

4900

5000

5100

5200

3700

3800

3900

4000

4100

4200

4300

4400

Table 28 — Fan Performance 551B150 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

Rpm

835

850

864

878

892

907

921

935

949

964

978

723

737

751

765

779

793

807

821

614

628

641

655

668

682

696

710

0.2

Bhp Watts Rpm

2.67

2.81

2.96

3.12

3.28

3.44

3.61

3.79

3.98

4.16

4.36

1.69

1.80

1.91

2.02

2.14

2.26

2.39

2.53

1.00

1.07

1.15

1.23

1.31

1.40

1.49

1.59

2487

2622

2762

2906

3055

3211

3370

3536

3707

3883

4066

1577

1675

1778

1885

1996

2112

2232

2357

929

997

1069

1144

1223

1305

1392

1482

878

891

905

918

932

945

959

973

987

1000

1014

773

785

798

812

825

838

851

864

673

685

697

709

722

734

747

760

EXTERNAL STATIC PRESSURE (in. wg)

0.4

Bhp Watts Rpm

2.91

3.06

3.22

3.38

3.54

3.71

3.89

4.07

4.26

4.45

4.65

1.90

2.01

2.13

2.25

2.37

2.50

2.63

2.77

1.17

1.25

1.33

1.42

1.51

1.60

1.70

1.80

2718

2856

3000

3148

3302

3461

3626

3795

3970

4151

4337

1775

1877

1984

2095

2210

2330

2455

2584

1095

1167

1243

1322

1405

1492

1582

1677

919

932

945

958

971

984

997

1010

1023

1036

1050

820

832

844

856

869

881

894

906

728

739

750

761

773

784

796

808

0.6

Bhp

3.17

3.32

3.48

3.64

3.81

3.99

4.17

4.35

4.54

4.74

4.95

2.12

2.24

2.35

2.48

2.61

2.74

2.88

3.02

1.36

1.44

1.53

1.61

1.71

1.80

1.91

2.01

Watts Rpm

2953

3096

3242

3396

3554

3716

3885

4059

4238

4422

4613

1978

2085

2195

2310

2430

2554

2682

2815

1267

1343

1423

1506

1593

1683

1777

1876

959

971

984

996

1008

1021

1033

1046

1059

1071

1084

866

877

889

900

912

923

935

947

781

791

801

812

822

833

844

855

0.8

Bhp Watts Rpm

3.42

3.58

3.74

3.91

4.09

4.26

4.45

4.64

4.84

5.04

5.25

2.35

2.46

2.59

2.71

2.85

2.98

3.13

3.27

1.55

1.64

1.72

1.82

1.92

2.02

2.12

2.23

3193

3339

3491

3648

3810

3976

4149

4326

4510

4698

4892

2187

2297

2412

2531

2654

2782

2914

3050

1445

1525

1608

1695

1786

1880

1979

2081

999

1010

1022

1034

1045

1057

1069

1082

1094

—

—

910

921

932

942

953

965

976

987

832

841

850

860

870

880

890

900

1.0

Bhp

3.69

3.85

4.01

4.19

4.36

4.55

4.74

4.93

5.13

—

—

2.57

2.70

2.82

2.95

3.09

3.23

3.38

3.53

1.75

1.84

1.93

2.03

2.13

2.23

2.34

2.46

Watts

3437

3588

3743

3903

4069

4240

4416

4598

4785

—

—

2400

2514

2633

2756

2883

3014

3150

3292

1629

1712

1799

1890

1984

2082

2184

2290

AIRFLOW

CFM

4700

4800

4900

5000

5100

5200

5300

5400

5500

5600

5700

5800

3700

3800

3900

4000

4100

4200

4300

4400

4500

4600

5900

6000

6100

6200

6300

Rpm

974

984

994

1005

1015

1026

1037

1048

1059

1070

1082

1093

881

889

898

907

916

925

934

944

954

963

1105

1116

—

—

—

LEGEND

1.2

Bhp

1.95

2.04

2.14

2.24

2.35

2.45

2.57

2.69

2.81

2.93

3.07

3.20

3.34

3.49

3.64

3.79

3.95

4.12

4.29

4.46

4.65

4.83

5.03

5.23

—

—

—

Watts

1816

1904

1995

2089

2187

2289

2395

2504

2618

2736

2858

2985

3116

3251

3391

3536

3685

3840

3999

4163

4333

4508

4688

4873

—

—

—

Bhp

— Brake Horsepower Input to Fan

Watts — Input Watts to Motor

Rpm

928

936

944

952

960

969

978

986

996

1005

1014

1024

1034

1044

1054

1064

1075

1085

1096

1106

1117

1128

—

—

—

—

—

EXTERNAL STATIC PRESSURE (in. wg)

1.4

Bhp Watts Rpm

—

—

—

—

—

3.31

3.45

3.60

3.74

3.90

4.06

4.22

4.39

4.57

4.75

4.93

5.13

2.16

2.25

2.35

2.46

2.57

2.68

2.80

2.92

3.05

3.18

3088

3219

3353

3492

3636

3784

3938

4096

4259

4427

4601

4779

2010

2100

2195

2293

2395

2500

2610

2723

2840

2962

—

—

—

—

—

1054

1063

1073

1082

1092

1101

1111

1121

1132

1142

1152

—

974

981

988

996

1004

1011

1020

1028

1037

1045

—

—

—

—

—

1.6

Bhp

2.37

2.47

2.57

2.68

2.80

2.91

3.03

3.16

3.29

3.42

3.56

3.71

3.85

4.01

4.17

4.33

4.50

4.67

4.85

5.03

5.22

—

—

—

—

—

—

Watts Rpm

3322

3456

3594

3737

3885

4037

4194

4356

4523

4695

4872

—

2207

2302

2399

2501

2607

2716

2828

2946

3067

3192

—

—

—

—

—

1093

1102

1111

1119

1129

1138

1147

1157

1167

—

—

—

1019

1025

1032

1038

1046

1053

1061

1068

1076

1085

—

—

—

—

—

1.8

Bhp Watts Rpm

3.82

3.96

4.12

4.27

4.44

4.60

4.78

4.95

5.14

—

—

—

2.58

2.69

2.80

2.91

3.03

3.15

3.27

3.40

3.54

3.67

—

—

—

—

—

3560

3697

3839

3986

4137

4293

4454

4619

4790

—

—

—

2409

2507

2608

2713

2822

2935

3052

3173

3297

3426

—

—

—

—

—

1131

1139

1148

1156

1165

1174

1183

1192

—

—

—

—

1062

1068

1074

1080

1087

1094

1101

1108

1115

1123

—

—

—

—

—

NOTES:

1. Boldface indicates field-supplied drive is required.

2. Maximum continuous bhp is 5.25.

3. See page 23 for general fan performance notes.

*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

2.0

Bhp

4.08

4.23

4.38

4.55

4.71

4.88

5.06

5.24

—

—

—

—

2.80

2.91

3.03

3.14

3.26

3.39

3.52

3.65

3.79

3.93

—

—

—

—

—

Watts

3801

3943

4088

4238

4393

4553

4718

4886

—

—

—

—

2615

2716

2821

2930

3042

3159

3279

3403

3531

3664

—

—

—

—

—

— 37 —

PRE-START-UP

WARNING: Failure to observe the following warnings could result in serious personal injury:

1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured.

3. Do not remove compressor terminal cover until all electrical sources are disconnected and properly tagged.

4. Relieve all pressure from system before touching or disturbing anything inside terminal box if refrigerant leak is suspected around compressor terminals. Use accepted methods to recover refrigerant.

5. Never attempt to repair soldered connection while refrigerant system is under pressure.

6. Do not use torch to remove any component. System contains oil and refrigerant under pressure. To remove a component, wear protective goggles and proceed as follows: a. Shut off electrical power to unit and install lockout tag.

b. Relieve all pressure from system using both high and low-pressure ports. Use accepted methods to recover refrigerant.

c. Cut component connection tubing with tubing cutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.

Proceed as follows to inspect and prepare the unit for initial start-up:

1. Remove all access panels.

2. Read and follow instructions on all WARNING, CAU-

TION, and INFORMATION labels attached to or shipped with unit.

3. Make the following inspections: a. Inspect for shipping and handling damages such as broken lines, loose parts, or disconnected wires.

b. Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a refrigerant leak. Leak-test all refrigerant tubing connections using electronic leak detector, halide torch, or liquid-soap solution.

c. Inspect all field-wiring and factory-wiring connections. Be sure that connections are completed and tight.

d. Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.

4. Verify the following: a. Make sure that condenser-fan blades are correctly positioned in fan orifice. Refer to

Condenser-Fan Adjustment section on page 42 for more details.

b. Make sure that air filters are in place.

c. Make sure that condensate drain trap is filled with water to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose parts have been removed.

e. Make sure that the start-up checklist has been performed and filled out.

NOTE: Ensure wiring does not contact any refrigerant tubing.

START-UP

I. UNIT PREPARATION

Make sure that unit has been installed in accordance with these installation instructions and applicable codes.

II. RETURN-AIR FILTERS

Make sure correct filters are installed in unit (see Table 1).

Do not operate unit without return-air filters.

III. OUTDOOR-AIR INLET SCREENS

Outdoor-air inlet screens must be in place before operating unit.

IV. COMPRESSOR MOUNTING

Compressors are internally spring mounted. Do not loosen or remove compressor holddown bolts.

V. INTERNAL WIRING

Check all electrical connections in unit control boxes; tighten as required.

VI. REFRIGERANT SERVICE PORTS

Each refrigerant system has 4 Schrader-type service gage ports: one on the suction line, one on the liquid line, and 2 on the compressor discharge line. Be sure that caps on the ports are tight.

VII. HIGH FLOW VALVES

Two high flow refrigerant valves are located on the compressor hot gas and suction tubes. Large black plastic caps distinguish these valves with o-rings located inside the caps.

These valves can not be accessed for service in the field.

Ensure the plastic caps are in place and tight or the possibility of refrigerant leakage could occur.

VIII. COMPRESSOR ROTATION

On 3-phase units, it is important to be certain the scroll compressor is rotating in the proper direction. To determine whether or not compressor is rotating in the proper direction:

1. Connect service gages to suction and discharge pressure fittings.

2. Energize the compressor.

3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.

If the suction pressure does not drop and the discharge pressure does not rise to normal levels:

1. Note that the evaporator fan is probably also rotating in the wrong direction.

2. Turn off power to the unit and install lockout tag.

3. Reverse any two of the unit power leads.

4. Turn on power to the unit.

The suction and discharge pressure levels should now move to their normal start-up levels.

NOTE: When the compressor is rotating in the wrong direction, the unit makes an elevated level of noise and does not provide heating or cooling.

CAUTION: Compressor damage will occur if rotation is not immediately corrected.

— 38 —

IX. COOLING

To start unit, turn on main power supply. Set system selector switch at COOL position and fan switch at AUTO position.

Adjust thermostat to a setting below room temperature.

Compressor starts on closure of contactor.

Check unit charge. Refer to Refrigerant Charge section on page 42.

Reset thermostat at a position above room temperature.

Compressor will shut off.

To Shut Off Unit

Set system selector switch at OFF position. Resetting thermostat at a position above room temperature shuts unit off temporarily until space temperature exceeds thermostat setting. Units are equipped with Cycle-LOC™ protection device. Unit shuts down on any safety trip and remains off; an indicator light on the thermostat comes on. Check reason for safety trip.

Compressor restart is accomplished by manual reset at the thermostat by turning the selector switch to OFF position and then ON position.

X. HEATING (IF ACCESSORY HEATER IS INSTALLED)

To start unit, turn on main power supply.

Set thermostat at HEAT position and a setting above room temperature, and set fan at AUTO position.

First stage of thermostat energizes the first-stage electric heater elements; second stage energizes second-stage electric heater elements. Check heating effects at air supply grille(s).

If accessory electric heaters do not energize, reset limit switch (located on evaporator-fan scroll) by pressing button located between terminals on the switch.

To Shut Off Unit

Set system selector switch at OFF position. Resetting heating selector lever below room temperature temporarily shuts unit off until space temperature falls below thermostat setting.

XI. SAFETY RELIEF

A soft solder joint in the suction line at the loss-of-charge/ low-pressure switch fitting provides pressure relief under abnormal temperature and pressure conditions.

XII. VENTILATION (CONTINUOUS FAN)

Set fan and system selector switches at ON and OFF positions, respectively. Evaporator fan operates continuously to provide constant air circulation.

XIII. OPERATING SEQUENCE

A. Cooling, Units Without EconoMi$er IV

When the thermostat calls for cooling, terminals G and Y1 are energized. The indoor (evaporator) fan contactor (IFC), outdoor (condenser) fan contactor (OFC), and compressor contactor no. 1 (C1) are energized and the evaporator-fan motor, compressor no. 1, and condenser fans start. The condenser-fan motors run continuously while unit is in cooling. If the thermostat calls for a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is energized and compressor no. 2 starts.

B. Heating, Units Without EconoMi$er IV (If Accessory

Heater is Installed)

Upon a call for heating through terminal W1, IFC and heater contactor no. 1 (HC1) are energized. On units equipped for 2 stages of heat, when additional heat is needed, HC2 is energized through W2.

C. Cooling, Units With EconoMi$er IV

When free cooling is not available, the compressors will be controlled by the zone thermostat. When free cooling is available, the outdoor-air damper is modulated by the

EconoMi$er IV control to provide a 50 to 55 F supply-air temperature into the zone. As the supply-air temperature fluctuates above 55 or below 50 F, the dampers will be modulated (open or close) to bring the supply-air temperature back within the set point limits.

For EconoMi$er IV operation, there must be a thermostat call for the fan (G). This will move the damper to its minimum position during the occupied mode.

Above 50 F supply-air temperature, the dampers will modulate from 100% open to the minimum open position. From

50 F to 45 F supply-air temperature, the dampers will maintain at the minimum open position. Below 45 F the dampers will be completely shut. As the supply-air temperature rises, the dampers will come back open to the minimum open position once the supply air temperature rises to 48 F.

If optional power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized.

If field-installed accessory CO

2

sensors are connected to the

EconoMi$er IV control, a demand controlled ventilation strategy will begin to operate. As the CO

2 increases above the CO

2

level in the zone

set point, the minimum position of the damper will be increased proportionally. As the CO

2

level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. Damper position will follow the higher demand condition from DCV mode or free cooling mode.

Damper movement from full closed to full open (or vice versa) will take between 1 1 /

2

and 2 1 /

2

minutes.

If free cooling can be used as determined from the appropriate changeover command (switch, dry bulb, enthalpy curve, differential dry bulb, or differential enthalpy), a call for cooling (Y1 closes at the thermostat) will cause the control to modulate the dampers open to maintain the supply air temperature set point at 50 to 55 F.

As the supply-air temperature drops below the set point range of 50 to 55 F, the control will modulate the outdoorair dampers closed to maintain the proper supply-air temperature.

D. Heating, Units with EconoMi$er IV

Upon a call for heating through terminal W1, IFC and heater contactor no. 1 (HC1) are energized. On units equipped for 2 stages of heat, when additional heat is needed, HC2 is energized through W2. The economizer damper moves to the minimum position. When the thermostat is satisfied, the damper moves to the fully closed position.

E. Units With Perfect Humidity™ Dehumidification System

Normal Design Cooling Operation

When the rooftop operates under the normal sequence of operation, the compressors will cycle to maintain indoor conditions. See Fig. 40.

The Perfect Humidity dehumidification system includes a factory-installed Motormaster® low ambient control to keep the head and suction pressure high, allowing normal design cooling mode operation down to 0° F.

— 39 —

Fig. 40 — Perfect Humidity™ System

Normal Design Cooling Operation

Subcooling Mode

When subcooling mode is initiated, this will energize (close) the liquid line solenoid valve (LLSV) forcing the hot liquid refrigerant to enter into the subcooling coil (see Fig. 41).

As the hot liquid refrigerant passes through the subcooling/ reheat dehumidification coil, it is exposed to the cold supply airflow coming through the evaporator coil. The liquid is further subcooled to a temperature approaching the evaporator leaving-air temperature. The liquid then enters a thermostatic expansion valve (TXV) where the liquid drops to a lower pressure. The TXV does not have a pressure drop great enough to change the liquid to a 2-phase fluid, so the liquid then enters the Acutrol™ device at the evaporator coil.

The liquid enters the evaporator coil at a temperature lower than in standard cooling operation. This lower temperature increases the latent capacity of the rooftop unit. The refrigerant passes through the evaporator and is turned into a vapor. The air passing over the evaporator coil will become colder than during normal operation. However, as this same air passes over the subcooling coil, it will be slightly warmed, partially reheating the air.

Subcooling mode operates only when the outside-air temperature is warmer than 40 F. A factory-installed temperature switch located in the condenser section will lock out subcooling mode when the outside temperature is cooler than 40 F.

The scroll compressors are equipped with crankcase heaters to provide protection for the compressors due to the additional refrigerant charge required by the subcooling/reheat coil.

When in subcooling mode, there is a slight decrease in system total gross capacity (5% less), a lower gross sensible capacity (20% less), and a greatly increased latent capacity

(up to 40% more).

Hot Gas Reheat Mode

When the humidity levels in the space require humidity control, a hot gas solenoid valve (specific to hot gas reheat mode only) will open to bypass a portion of hot gas refrigerant around the condenser coil (see Fig. 42).

This hot gas will mix with liquid refrigerant leaving the condenser coil and flow to the subcooling/reheat dehumidification coil. Now the conditioned air coming off the evaporator

Fig. 41 — Perfect Humidity System

Subcooling Mode Operation

will be cooled and dehumidified, but will be warmed to neutral conditions (72 F to 75 F) by the subcooling/reheat dehumidification coil.

NOTE: The 551B090-150 rooftop units can operate one circuit in subcooling mode and one circuit in hot gas reheat mode or both circuits in hot gas reheat mode, or both in normal design cooling mode.

The net effect of the rooftop when in hot gas reheat mode is to provide nearly all latent capacity removal from the space when sensible loads diminish (when outdoor temperature conditions are moderate). When in hot gas reheat mode, the unit will operate to provide mostly latent capacity and extremely low sensible heat ratio capability.

Similar to the subcooling mode of operation, hot gas reheat mode operates only when the outside air temperature is warmer than 40 F. Below this temperature, a factory-installed outside air temperature switch will lock out this mode of operation.

See Table 29 for the Perfect Humidity dehumidification system sequence of operation.

Fig. 42 — Perfect Humidity System

Hot Gas Reheat Mode Operation

— 40 —

Table 29 — Perfect Humidity™ Dehumidification System Sequence of Operation and System Response — Dual Compressor Units

THERMOSTAT

H

Off

On

On

On

On

On

INPUT

Y1

—

On

On

On

On

Off

Y2

—

On

Off

On

Off

Off

ECONOMIZER FUNCTION

OAT < Economizer

Set Point

No

No

Yes

Yes

No

Economizer

Off

Off

On

On

Off

551B UNIT OPERATION

Compressor

1

First Stage

Subcooling

Mode

Hot Gas

Reheat Mode

Compressor

2

Unit Operates Under Normal Sequence of Operation

On Yes No On

Second Stage

Subcooling

Mode

Yes

Hot Gas

Reheat Mode

No

On

On

Yes

Yes

No

No

On

On

No

No

Yes

Yes

On

On

No

No

Yes

Yes

On

On

No

No

Yes

Yes

LEGEND

OAT

— Outdoor Air Temperature

NOTE: On a thermostat call for W1, all cooling and dehumidification will be off.

F. Units With Power Exhaust

When the outdoor-air damper is modulated open, the two end switches located in the actuator are tripped. The factory settings are: switch no. 1 will close at 30% outdoor air; switch no. 2 will close at 70% outdoor-air. Both switches are field adjustable. As the outdoor-air damper opens, switch no.

1 closes, energizing a double-pole relay that starts fan no. 1.

As the outdoor-air damper continues to open, switch no. 2 will close, energizing a double-pole relay that starts fan no.

2. When the outdoor-air damper closes to a point below the fan start points (30% fan no. 1, 70% fan no. 2), the respective fan will be deenergized.

SERVICE

CAUTION: When servicing unit, shut off all electrical power to unit to avoid shock hazard or injury from rotating parts.

I. CLEANING

Inspect unit interior at the beginning of each heating and cooling season or as operating conditions require.

A. Evaporator Coil

1. Turn unit power off and install lockout tag. Remove evaporator coil access panel.

2. If EconoMi$er IV or accessory two-position damper is installed, remove economizer or two-position damper by disconnecting EconoMi$er IV plug and removing mounting screws.

3. Slide filters out of unit.

4. Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister.

Wash both sides of coil and flush with clean water.

For best results, back-flush toward return-air section to remove foreign material.

5. Flush condensate pan after completion.

6. Reinstall economizer or two-position damper and filters.

7. Reconnect wiring.

8. Replace access panels.

B. Condenser Coils

Inspect coils monthly. Clean condenser coils annually, and as required by location and outdoor-air conditions.

Clean 2-row coils as follows:

1. Turn off unit power and install lockout tag.

2. Remove top panel screws on condenser end of unit.

3. Remove condenser coil corner post. See Fig. 43. To hold top panel open, place coil corner post between top panel and center post. See Fig. 44.

4. Remove device holding coil sections together at return end of condenser coil. Carefully separate the outer coil section 3 to 4 in. from the inner coil section.

See Fig. 45.

5. Use a water hose or other suitable equipment to flush down between the 2 coil sections to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.

6. Secure the sections together. Reposition the coil sections, and remove the coil corner post from between the top panel and center post. Install the coil corner post and coil center post, and replace all screws.

Fig. 43 — Cleaning Condenser Coil

Fig. 44 — Propping Up Top Panel

— 41 —

Fig. 45 — Separating Coil Sections

C. Condensate Drain

Check and clean each year at start of cooling season. In winter, protect against freeze-up.

D. Filters

Clean or replace at start of each heating and cooling season, or more often if operating conditions require it. Replacement filters must be same dimensions as original filters.

E. Outdoor-Air Inlet Screen

Clean screen with steam or hot water and a mild detergent.

Do not use throwaway filters in place of screens.

II. LUBRICATION

A. Compressors

Each compressor is charged with correct amount of oil from the factory.

B. Fan Motor Bearings

Fan motor bearings are permanently lubricated. No further lubrication of condenser-fan or evaporator-fan motors is required.

III. CONDENSER-FAN ADJUSTMENT (FIG. 46)

1. Shut off unit power supply and install lockout tag.

2. Remove condenser-fan assembly (grille, motor, motor cover, and fan) and loosen fan hub setscrews.

3. Adjust fan height as shown in Fig. 46.

4. Tighten setscrews and replace condenser-fan assembly.

UNIT VOLTAGE

208/230 v

460 v and 575 v

FAN HEIGHT “A” (in.)

2.75

3.50

Fig. 46 — Condenser-Fan Adjustment

IV. BELT/PULLEY ADJUSTMENT

Inspect once each season or sooner if conditions warrant, verifying that belt tension and pulley alignment are correct.

Replace belt if required.

V. ECONOMI$ER IV ADJUSTMENT

Refer to Optional EconoMi$er IV section on page 13.

VI. REFRIGERANT CHARGE

Amount of refrigerant charge is listed on unit nameplate

(also refer to Table 1). Refer to Bryant Standard Service

Techniques Manual, Chapter 1, Refrigerants section.

Unit panels must be in place when unit is operating during charging procedure.

A. No Charge

Locate and repair any refrigerant leak. Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1).

B. Low Charge Cooling

Use Cooling Charging Charts, Fig. 47-50. Vary refrigerant until the conditions of the appropriate chart are met. Note that charging charts are different from the type normally used. Charts are based on charging the units to the correct superheat for the various operating conditions. Accurate pressure gage and temperature sensing device are required. Connect the pressure gage to the service port on the suction line. Mount the temperature sensing device on the suction line and insulate it so that outdoor ambient temperature does not affect the reading. Indoor-air cfm must be within the normal operating range of the unit.

C. Perfect Humidity™ System Charging

The system charge for units with the Perfect Humidity option is greater than that of the standard unit alone. The charge for units with this option is indicated on the unit nameplate drawing. Also refer to Fig. 51-53. To charge systems using the Perfect

Humidity dehumidification system, fully evacuate, recover and recharge the system to the nameplate specified charge level.

To check or adjust refrigerant charge on systems using the

Perfect Humidity Dehumidification system, charge per

Fig. 51-53.

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed.

The charts reference a liquid pressure (psig) and temperature at a point between the condenser coil and the subcooling/reheat dehumidification coil. A tap is provided on the unit to measure liquid pressure entering the subcooling/ reheat dehumidification coil.

IMPORTANT:

The subcooling mode charging charts

(Fig. 51-53) are to be used ONLY with units having the optional Perfect Humidity dehumidification system. DO NOT use standard charts (Fig. 47-50) for units with Perfect Humidity option, and DO NOT use Fig. 51-53 for standard units.

D. To Use Cooling Charging Charts, Standard Units

Take the outdoor ambient temperature and read the suction pressure gage. Refer to appropriate chart to determine what the suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted.

EXAMPLE (Fig. 47):

Circuit 1

Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 85 F

Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig

Suction Temperature should be . . . . . . . . . . . . . . . . . . 46 F

(Suction Temperature may vary ±5° F.)

— 42 —

Fig. 47 — Cooling Charging Charts, Standard 551B090 Unit

Fig. 48 — Cooling Charging Charts, Standard 551B102 Unit

— 43 —

Fig. 49 — Cooling Charging Charts, Standard 551B120 Unit

Fig. 50 — Cooling Charging Charts, Standard 551B150 Unit

— 44 —

E. To Use Cooling Charging Charts, Units the Perfect

Humidity™ Dehumidification System

Refer to the charts (Fig. 51-53) to determine the proper leaving condenser pressure and temperature.

EXAMPLE: (Fig. 51)

Circuit 1

Leaving Condenser Pressure . . . . . . . . . . . . . . . . . . . 300 psig

Leaving Condenser Temperature . . . . . . . . . . . . . . . . . .117 F

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed.

VII. REPLACEMENT PARTS

A complete list of replacement parts may be obtained from any Bryant distributor upon request.

NOTE: When using the charging charts, it is important that only the subcooling/ reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed.

Fig. 52 — Cooling Charging Chart, 581B102 and 120

With the Perfect Humidity Dehumidification System

NOTE: When using the charging charts, it is important that only the subcooling/ reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed.

Fig. 51 — Cooling Charging Chart, 581B090

With the Perfect Humidity Dehumidification System

NOTE: When using the charging charts, it is important that only the subcooling/ reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumidification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed controller jumpered to run the fan at full speed.

Fig. 53 — Cooling Charging Chart, 581B150

With the Perfect Humidity Dehumidification System

— 45 —

TROUBLESHOOTING

I. UNIT TROUBLESHOOTING

Refer to Tables 30-32 for additional information.

PROBLEM

Compressor(s) and

Condenser Fan

Will Not Start.

Compressor(s) Will Not

Start but Condenser Fan

Runs.

Compressor(s) Cycles

(Other Than Normally

Satisfying Thermostat).

Compressor(s) Operates

Continuously.

Scroll Compressor(s)

Makes Excessive Noise.

Excessive Head Pressure.

Head Pressure Too Low.

Excessive Suction

Pressure.

Suction Pressure Too Low.

Compressor No. 2

Will Not Run.

Table 30 — Cooling Troubleshooting

CAUSE

Power failure.

Fuse blown or circuit breaker tripped.

Defective thermostat, contactor, transformer, control relay.

Insufficient line voltage.

Incorrect or faulty wiring.

Thermostat setting too high.

High pressure switch tripped.

Low pressure switch tripped.

Freeze-up protection thermostat tripped.

Faulty wiring or loose connections in compressor circuit.

Compressor motor(s) burned out, seized, or internal overload open.

Defective overload.

One leg of 3-phase power dead.

Refrigerant overcharge or undercharge.

REMEDY

Call power company.

Replace fuse or reset circuit breaker.

Replace component.

Determine cause and correct.

Check wiring diagram and rewire correctly.

Lower thermostat setting below room temperature.

See problem “Excessive Head Pressure.”

Check system for leaks, repair, and recharge.

See problem “Suction Pressure Too Low.”

Check wiring and repair or replace.

Determine cause. Replace compressor(s).

Defective compressor.

Insufficient line voltage.

Blocked condenser.

Defective overload.

Defective thermostat.

Faulty condenser-fan motor(s) or capacitor.

Restriction in refrigerant system.

Dirty air filter.

Unit undersized for load.

Thermostat set too low.

Low refrigerant charge.

Leaking valves in compressor.

Air in system.

Condenser coil dirty or restricted.

Compressor(s) rotating in the wrong direction.

Dirty air filter.

Dirty condenser coil.

Refrigerant overcharged.

Air in system.

Condenser air restricted or air short-cycling.

Low refrigerant charge.

Compressor valves leaking.

Restriction in liquid tube.

High heat load.

Compressor valves leaking.

Refrigerant overcharged.

Dirty air filter.

Low refrigerant charge.

Metering device or low side restricted.

Insufficient evaporator airflow.

Temperature too low in conditioned area.

Field-installed filter drier restricted.

Outdoor ambient temperature below 25 F.

Unit in economizer mode.

Determine cause and replace.

Replace fuse or reset circuit breaker. Determine cause.

Recover refrigerant, evacuate system, and recharge to nameplate.

Replace and determine cause.

Determine cause and correct.

Determine cause and correct.

Determine cause and replace.

Replace thermostat.

Replace.

Locate restriction and remove.

Replace filter.

Decrease load or increase unit size.

Reset thermostat.

Locate leak, repair, and recharge.

Replace compressor.

Recover refrigerant, evacuate system, and recharge.

Clean coil or remove restriction.

Reverse the 3-phase power leads as described in

Start-Up section, page 38.

Replace filter.

Clean coil.

Remove excess refrigerant.

Recover refrigerant, evacuate system to 500 microns, and recharge.

Determine cause and correct.

Check for leaks, repair, and recharge.

Replace compressor(s).

Remove restriction.

Check for source and eliminate.

Replace compressor(s).

Recover excess refrigerant.

Replace filter.

Check for leaks, repair, and recharge.

Remove source of restriction.

Increase air quantity. Check filter and replace if necessary.

Reset thermostat.

Replace.

Install low-ambient kit.

Proper operation; no remedy necessary.

— 46 —

Table 31 — Perfect Humidity™ Dehumidification System Subcooling Mode Service Analysis

PROBLEM

Subcooling Mode (Liquid Reheat)

Will Not Energize.

Low System Capacity.

Loss of Compressor Superheat

Conditions with Subcooling/Reheat

Dehumidification Coil Energized.

CAUSE

No power to control transformer from evaporator-fan motor.

No power from control transformer to liquid line solenoid valve.

REMEDY

Check power source and evaporator-fan relay. Ensure all wire connections are tight.

1. Fuse open; check fuse. Ensure continuity of wiring.

2. Low-pressure switch open. Cycle unit off and allow lowpressure switch to reset. Replace switch if it will not close.

3. Transformer bad; check transformer.

Liquid line solenoid valve will not operate.

1. Solenoid coil defective; replace.

2. Solenoid valve stuck open; replace.

Liquid line solenoid valve will not open.

Valve is stuck closed; replace valve.

Low refrigerant charge or frosted evaporator coil.

Thermostatic expansion valve (TXV).

1. Check charge amount. Charge per Fig. 51-53.

2. Evaporator coil frosted; check and replace low-pressure switch if necessary.

1. Check TXV bulb mounting, and secure tightly to suction line.

2. Replace TXV if stuck open or closed.

Table 32 — Perfect Humidity Dehumidification Hot Gas Reheat Mode Service Analysis

PROBLEM

Reheat Mode Will Not Energize.

Loss of Compressor Superheat

Conditions with Subcooling/Reheat

Dehumidification Coil Energized.

Excessive Superheat.

CAUSE

No power to control transformer from evaporator-fan motor.

No power from control transformer to hot gas line solenoid valve.

Low refrigerant charge or frosted evaporator coil.

Thermostatic expansion valve (TXV).

REMEDY

Check power source and evaporator-fan relay. Ensure all wire connections are tight.

1. Fuse open; check fuse. Ensure continuity of wiring.

2. Low-pressure switch open. Cycle unit off and allow lowpressure switch to reset. Replace switch if it will not close.

3. Transformer bad; check transformer.

Hot gas line solenoid valve will not operate. 1. Solenoid coil defective; replace.

2. Solenoid valve stuck closed; replace.

1. Check charge amount. Charge per Fig. 51-53.

2. Evaporator coil frosted; check and replace low-pressure switch if necessary.

1. Check TXV bulb mounting, and secure tightly to suction line.

2. Replace TXV if stuck open or closed.

Liquid line solenoid valve will not operate.

Valve is stuck; replace valve.

Hot gas line solenoid valve will not close.

Valve is stuck; replace valve.

— 47 —

II. ECONOMI$ER IV TROUBLESHOOTING

See Table 33 for EconoMi$er IV logic.

A functional view of the EconoMi$er IV is shown in Fig. 54.

Typical settings, sensor ranges, and jumper positions are also shown. An EconoMi$er IV simulator program is available from Bryant to help with EconoMi$er IV training and troubleshooting.

A. EconoMi$er IV Preparation

This procedure is used to prepare the EconoMi$er IV for troubleshooting. No troubleshooting or testing is done by performing the following procedure.

NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm resistor, and a 5.6 kilo-ohm resistor which are not supplied with the EconoMi$er IV.

IMPORTANT: Be sure to record the positions of all potentiometers before starting troubleshooting.

1. Disconnect power at TR and TR1. All LEDs should be off. Exhaust fan contacts should be open.

2. Disconnect device at P and P1.

3. Jumper P to P1.

4. Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor across T and T1.

5. Jumper TR to 1.

6. Jumper TR to N.

7. If connected, remove sensor from terminals S

O

and +.

Connect 1.2 kilo-ohm 4074EJM checkout resistor across terminals S

O

and +.

8. Put 620-ohm resistor across terminals S

R

and +.

9. Set minimum position, DCV set point, and exhaust potentiometers fully CCW (counterclockwise).

10. Set DCV maximum position potentiometer fully CW

(clockwise).

11. Set enthalpy potentiometer to D.

12. Apply power (24 vac) to terminals TR and TR1.

B. Differential Enthalpy

To check differential enthalpy:

1. Make sure EconoMi$er IV preparation procedure has been performed.

2. Place 620-ohm resistor across S

O

and +.

3. Place 1.2 kilo-ohm resistor across S

R

Cool LED should be lit.

and +. The Free

4. Remove 620-ohm resistor across S

O

Cool LED should turn off.

and +. The Free

5. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

C. Single Enthalpy

To check single enthalpy:

1. Make sure EconoMi$er IV preparation procedure has been performed.

2. Set the enthalpy potentiometer to A (fully CCW). The

Free Cool LED should be lit.

3. Set the enthalpy potentiometer to D (fully CW). The

Free Cool LED should turn off.

4. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

D. DCV (Demand Controlled Ventilation) and Power

Exhaust

To check DCV and Power Exhaust:

1. Make sure EconoMi$er IV preparation procedure has been performed.

2. Ensure terminals AQ and AQ1 are open. The LED for both DCV and Exhaust should be off. The actuator should be fully closed.

3. Connect a 9-v battery to AQ (positive node) and AQ1

(negative node). The LED for both DCV and Exhaust should turn on. The actuator should drive to between

90 and 95% open.

4. Turn the Exhaust potentiometer CW until the

Exhaust LED turns off. The LED should turn off when the potentiometer is approximately 90%. The actuator should remain in position.

5. Turn the DCV set point potentiometer CW until the

DCV LED turns off. The DCV LED should turn off when the potentiometer is approximately 9 v. The actuator should drive fully closed.

6. Turn the DCV and Exhaust potentiometers CCW until the Exhaust LED turns on. The exhaust contacts will close 30 to 120 seconds after the Exhaust

LED turns on.

7. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

E. DCV Minimum and Maximum Position

To check the DCV minimum and maximum position:

1. Make sure EconoMi$er IV preparation procedure has been performed.

2. Connect a 9-v battery to AQ (positive node) and AQ1

(negative node). The DCV LED should turn on. The actuator should drive to between 90 and 95% open.

3. Turn the DCV Maximum Position potentiometer to midpoint. The actuator should drive to between 20 and 80% open.

4. Turn the DCV Maximum Position potentiometer to fully CCW. The actuator should drive fully closed.

5. Turn the Minimum Position potentiometer to midpoint. The actuator should drive to between 20 and

80% open.

6. Turn the Minimum Position Potentiometer fully CW.

The actuator should drive fully open.

7. Remove the jumper from TR and N. The actuator should drive fully closed.

8. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

F. Supply-Air Input

To check supply-air input:

1. Make sure EconoMi$er IV preparation procedure has been performed.

2. Set the Enthalpy potentiometer to A. The Free Cool

LED turns on. The actuator should drive to between

20 and 80% open.

3. Remove the 5.6 kilo-ohm resistor and jumper T to T1.

The actuator should drive fully open.

— 48 —

4. Remove the jumper across T and T1. The actuator should drive fully closed.

5. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

G. EconoMi$er IV Troubleshooting Completion

This procedure is used to return the EconoMi$er IV to operation. No troubleshooting or testing is done by performing the following procedure.

1. Disconnect power at TR and TR1.

2. Set enthalpy potentiometer to previous setting.

3. Set DCV maximum position potentiometer to previous setting.

4. Set minimum position, DCV set point, and exhaust potentiometers to previous settings.

5. Remove 620-ohm resistor from terminals S

R

and +.

6. Remove 1.2 kilo-ohm checkout resistor from terminals S

O

and +. If used, reconnect sensor from terminals S

O

and +.

7. Remove jumper from TR to N.

8. Remove jumper from TR to 1.

9. Remove 5.6 kilo-ohm resistor from T and T1. Reconnect wires at T and T1.

10. Remove jumper from P to P1. Reconnect device at P and P1.

11. Apply power (24 vac) to terminals TR and TR1.

Table 33 — EconoMi$er IV Input/Output Logic

Demand Control

Ventilation (DCV)

Below set

(DCV LED Off)

Above set

(DCV LED On)

High

(Free Cooling LED Off)

Low

(Free Cooling LED On)

High

(Free Cooling LED Off)

Low

INPUTS

Enthalpy*

Outdoor

(Free Cooling LED On)

Return

Low

High

Low

High

**Modulation is based on the supply-air sensor signal.

††Modulation is based on the DCV signal.

Y1 Y2

Compressor

Stage

1

Stage

2

On On On

On Off On

Off Off Off

On On On

On Off Off

Off Off Off

On On On

On Off On

Off Off Off

On On On

On Off Off

Off Off Off

Off

Off

On

Off

On

Off

Off

Off

Off

Off

Off

Off

*For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point.

†Power at N terminal determines Occupied/Unoccupied setting:

24 vac (Occupied), no power (Unoccupied).

OUTPUTS

N Terminal†

Occupied

Minimum position

Damper

Closed

Unoccupied

Modulating** (between min. position and full-open)

Minimum position

Modulating†† (between min. position and DCV maximum)

Modulating***

Modulating** (between closed and full-open)

Closed

Modulating†† (between closed and DCV maximum)

Modulating†††

***Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum position

(DCV) or fully open (supply-air signal).

†††Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV) or fully open (supply-air signal).

Fig. 54 — EconoMi$er IV Functional View

— 49 —

Access panels

14

Barometric flow capacity

16

Charging chart, refrigerant

43-45

Clearance

2, 5

CO

2

sensor

Configuration

20

Settings

18, 20

Compressor

Lubrication

42

Mounting

38

Rotation

38

Condensate drain

Cleaning

42

Location

2, 4

Condenser coil

6

Cleaning

41

Condenser fan

6

Adjustment

42

Control circuit

Wiring

11

Wiring raceway

11

Convenience outlet

13

Demand ventilation control

19

Dehumidification

20

Dimensions

3, 5

Ductwork

1

EconoMi$er IV

13-20, 48, 49

Adjustment

42

Components

14

Damper movement

19

Wiring

15

Electrical connections

7

Electrical data

8-10

Electric heaters

10

Enthalpy changeover set points

18

Evaporator coil

6

Cleaning

41

Evaporator fan motor

6

Lubrication

42

Motor data

22, 23

Performance

24-37

Pulley adjustment

22

Pulley setting

6, 22

Speed

6

Factory-installed options

Convenience outlet

13

Disconnect switch

11

EconoMi$er IV

13-20

Manual outdoor air damper

13

Perfect Humidity™ dehumidification

system

11, 12

Filter

Cleaning

42

Installation

15

Size

6

Freeze protection thermostat

6

Heat anticipator settings

11

High flow valves

38

High pressure switch

6

Horizontal units

1, 2

Humidistat

12

Indoor air quality sensor

18

Low pressure switch

6

Manual outdoor air damper

13

Mounting

Unit

2

Non-fused disconnect switch

11

Operating sequence

Cooling

39

EconoMi$er IV

39

Heating

39

Perfect Humidity™ dehumidification

package

39-41

Outdoor air hood

13-15

Outdoor air temperature sensor

14

Outdoor air inlet screens

Cleaning

42

Copyright 2005 Bryant Heating & Cooling Systems

INDEX

Perfect Humidity™ dehumidification

system

11, 12, 21, 39-42, 45, 47

Physical data

6

Power supply

Wiring

7

Pressure, drop

EconoMi$er IV

23

Electric heat

23

Perfect Humidity dehumidification

21

Pressure switches

High pressure

6

Low pressure

6

Pre-start-up

38

Refrigerant

Charge

6, 42

Type

6

Refrigerant service ports

38

Replacement parts

45

Return air filter

6, 38

Return air temperature sensor

17

Rigging unit

2, 4

Roof curb

Assembly

1

Dimensions

3

Connector package

3

Leveling tolerances

4

Weight

6

Safety considerations

1

Safety relief

39

Service

41-45

Service ports

38

Slab mount

1

Start-up

38-41

Start-up checklist

CL-1

Supply air temperature sensor

14

Thermostat

11

Troubleshooting

46-49

Ventilation

39

Weight

Corner

5

EconoMi$er IV

5, 6

Perfect Humidity dehumidification

6

Unit

4-6

Wiring

EconoMi$er IV

15

Humidistat

12

Perfect Humidity system

12

Power connections

7

Printed in U.S.A.

CATALOG NO. 04-53551004-01

START-UP CHECKLIST

(Remove and Store in Job File)

MODEL NO.: ______________________________________

DATE:_____________________________________________

BUILDING LOCATION: ____________________________

SERIAL NO.: ___________________________________________

TECHNICIAN: _________________________________________

II. PRE-START-UP (insert checkmark in box as each item is completed)

VERIFY JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

CHECK THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK THAT RETURN (INDOOR SECTION) AIR FILTERS ARE CLEAN AND IN PLACE

VERIFY THAT UNIT INSTALLATION IS LEVEL

CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING AND ORIFICE AND CHECK THAT

SETSCREW IS TIGHT

CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS

CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES OR

SHARP METAL EDGES

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE

CIRCUIT 1 COMPRESSOR AMPS

CIRCUIT 2 COMPRESSOR AMPS

EVAPORATOR FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

L1-L2

L1

L1

L1

DB

DB

DB

L2-L3

L2

L2

L2

WB

WB

WB

L3-L1

L3

L3

L3

PRESSURES

REFRIGERANT SUCTION, CIRCUIT 1

REFRIGERANT SUCTION, CIRCUIT 2

REFRIGERANT DISCHARGE, CIRCUIT 1

REFRIGERANT DISCHARGE, CIRCUIT 2

PSIG AT

PSIG AT

PSIG AT

PSIG AT

F (AT SERVICE PORT)

F (AT SERVICE PORT)

F (CONDENSER LIQUID LINE OUTLET TUBE)

F (CONDENSER LIQUID LINE OUTLET TUBE)

VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 43-45.

Copyright 2005 Bryant Heating & Cooling Systems Printed in U.S.A.

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CATALOG NO. 04-53551004-01