Bryant 551C, 551B User Manual

551B 036--072
551C 024--060

SINGLE--PACKAGE ROOFTOP ELECTRIC COOLING
UNITS WITH OPTIONAL ELECTRIC HEA T

Installation Instructions

TABLE OF CONTENTS

Page

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

INSTALLATION 1..................................

Step 1--Provide Unit Support 2......................

ROOF CURB 2................................

SLAB MOUNT (Horizontal Units Only) 2...........

ALTERNATE UNIT SUPPORT 2.................

Step 2--Field Fabricate Ductwork 2...................

Step 3--Install External Trap for Condensate Drain 2.......

Step 4--Rig and Place Unit 2.........................

POSITIONING 4..............................

Step 5 — Make Electrical Connections 8................

FIELD POWER SUPPLY 8......................

FIELD CONTROL WIRING 8....................

HEAT ANTICIPATOR SETTINGS 8...............

Step 6 — Adjust Factory-Installed Options 22...........

PERFECT HUMIDITY ADAPTIVE

DEHUMIDIFICATION SYSTEM 22..............

DISCONNECT SWITCH 22.....................

MANUAL OUTDOOR-AIR DAMPER 22..........

CONVENIENCE OUTLET 22...................

OPTIONAL ECONOMI$ER IV 24................

ECONOMI$ER IV STANDARD SENSORS 25......

ECONOMI$ER IV CONTROL MODES 26.........

Step 7 — Adjust Evaporator-Fan Speed 31..............

PRE--START--UP 48..................................

START-- UP 48.......................................

SERVICE 50........................................

TROUBLESHOOTING 57.............................

START-- UP CHECKLIST 61...........................

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 extinguishers
available for all brazing operations.

Recognize safety information. This is the safety--alert symbol

. When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and

CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
reliability,or operation.

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal
injury or death.

Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lockout tag. Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit
rating plate.

WARNING

INSTALLATION

Unit is shipped in the vertical discharge configuration. To convert
to horizontal discharge application, remove duct opening covers.
Using the same screws, install covers on duct openings in
basepan of unit with insulation-side down. Seals around
openings must be tight. (See Fig. 1.)

1

Step 1 —Provide Unit Support

Roof Curb

Assemble and install accessory roof curb in accordance with
instructions shipped with curb. (See Fig. 2.) Install insulation,
cant strips, roofing felt, and counter flashing as shown. Ductwork
must be attached to curb, not to the unit. If electric control power
or gas service is to be routed through the basepan, attach the
accessory thru-the-bottom service connections to the basepan in
accordance with the accessory installation instructions.
Connections must be installed before unit is set on roof curb.

551B,C

Fig. 1 --- Horizontal Conversion Panels

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 result in
air leaks and poor unit performance.

Curb should be level. Unit leveling tolerances are shown in Fig.

3. This is necessary for unit drain to function properly. Refer to
Accessory Roof Curb Installation Instructions for additional
information as required.

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.

Alternate Unit

When the curb or adapter cannot be used, support unit with
sleeper rails using unit curb or adapter 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.

Support

C06108

Step 2 —Field Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal
applications, field-supplied isolation flanges should be attached to
horizontal discharge openings and all ductwork should be secured
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 is not required around ductwork. Cabinet
return-air static pressure (a negative condition) shall not exceed

0.35 in. wg with economizer or 0.45 in. wg without economizer.

Step 3 —Install External Trap for Condensate
Drain

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

When using the standard side drain connection, ensure 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 side connection. The center drain plug looks
like a star connection, however it can be removed with a
socket drive extension. (See Fig. 4.) The piping for the
condensate drain and external trap can be completed after the unit
is in place.

All units must have an external trap for condensate drainage.
Install a trap 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

/4in.). (See Fig. 5.)

1

/2-in.

Step 4 —Rig and Place Unit

Inspect unit for transportation damage, and 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, and
rollers may be used to move unit across a roof. Level by using
unit frame as a reference. See Table 1, 2 and Fig. 6 for additional
information. Operating weight is shown in Table 1, 2 and Fig. 6.

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

!

PERSONAL INJURY AND PROPERTY DAMAGE
HAZARD

Failure to follow this warning could result in personal
injury, death and property damage.

All panels must be in place when rigging and lifting.

WARNING

2

CONNECTOR

PKG. ACCY.

BC

CRBTMPWR001A01
CRBTMPWR002A01 1

CRBTMPWR003A01

1˝˝-9

11

[551]

/

16

CRBTMPWR004A01

DALT

DRAIN

HOLE

1˝-4˝˝

13/

[44.5]

4

[406]

GAS POWER CONTROL

3

/

˝

4

[19] NPT

1

/

˝

2

[12.7] NPT

3

/

˝

4

[19] NPT

3

/4[19] NPT

˝

1

/4[31.7]

˝

3

˝

/4[19] NPT

1

˝

1

/4[31.7]

1

/

2

[12.7]

˝

ACCESSORY

POWER

1

/

˝

2

[12.7]

ROOF CURB

ACCESSORY

CRRFCURB001A01

CRRFCURB002A01

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels.

3. Dimensions in [ ] are in millimeters.

4. Roof curb: galvanized steel.

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

6. Service clearance: 4 ft on each side.

1˝-2˝
[356]

2˝-0˝
[610]

A

551B 036-072
551C 024-060

UNIT
SIZE

7. Direction of airflow.

8. Connector packages CRBTMPWR001A01
and 002A01 are for thru-the-curb type gas.
Packages CRBTMPWR003A01 and 004A01
are for thru-the-bottom type gas connections.

551B,C

Fig. 2 --- Roof Curb Details

3

C06365

551B,C

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C A-C

0.5 1.0 1.0

Fig. 3 --- Unit Leveling Tolerances

C06110

Positioning

Maintain clearance around and above unit to provide minimum
distance from combustible materials, proper airflow, and service
access. (See Fig. 7, 8 and 9.)

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

1

/

in. clearance between the roof curb and the base

4--

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
inlets near exhaust vents or other sources of contaminated air.

CONDENSATE PAN (SIDE VIEW)

HORIZONTAL
DRAIN OUTLET

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

DRAIN PLUG

Fig. 4 --- Condensate Drain Connection

C06003

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

C06004

Fig. 5 --- Condensate Drain Piping Details

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

After unit is in position, remove polyethylene shipping wrapper
and top crating.

4

NOTES:

OPERATING

OPERATING

551

B

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

2. Dimensionin( )isinmillimeters.

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. Weights include base unit without economizer. See Table 1 for unit operating weights with accessory economizer.

5. Weights include base unit without the Perfect Humidityt adaptive dehumidification system. See Table 1 for unit operating weights with the Perfect Humidityt
system.

C06111

Fig. 6 --- Rigging Details

551B,C

UNIT
551C

024 435 197 73.69 1872 35.50 902 33.31 847
036 445 202 73.69 1872 35.50 902 33.31 847
048 465 211 73.69 1872 35.50 902 33.31 847
060 520 236 73.69 1872 35.50 902 41.31 1050

UNIT

036 530 240 73.69 1872 35.50 902 33.31 847
048 540 245 73.69 1872 35.50 902 33.31 847
060 560 254 73.69 1872 35.50 902 33.31 847
072 635 288 73.69 1872 35.50 902 41.31 1050

OPERATING DIMENSIONS

WEIGHT

lb kg in. mm in. mm in. mm

OPERATING DIMENSIONS

WEIGHT

lb kg in. mm in. mm in. mm

“A” “B” “C”

“A” “B” “C”

!

PERSONAL INJURY AND PROPERTY DAMAGE
HAZARD

WARNING

Failure to follow this warning could result in personal
injury, death and property damage.

All panels must be in place when rigging and lifting.

C06208

Fig. 7 --- Roof Curb Alignment

5

CONTROL BOX PANEL

COMPRESSOR

ACCESS

PANEL

551B,C

C06375

PANEL

ACCESS

COMPRESSOR

Fig. 8 --- 551B 036--072 Base Unit Dimensions

CONTROL BOX PANEL

6

C06376

551B,C

COMPRESSOR

ACCESS

PANEL

CONTROL BOX PANEL

Fig. 9 --- 551C 024--060 Base Unit Dimensions

7

Step 5 —Make Electrical Connections

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury or death.

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/NFPA (National
Fire Protection Association), latest edition, and local
electrical codes. Do not use gas piping as an electrical

ground.

Field Power Supply

551B,C

All units except 208/230-v units are factory wired for the voltage
shown on the 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 1/4-- in. terminal on
the transformer and connecting it to the 200-v 1/4--in. terminal
from the transformer.

Refer to unit label diagram for additional information. Pigtails
are provided for field service. Use factory-supplied splices or UL
(Underwriters’ Laboratories) approved copper connector.

When installing units, provide a disconnect per NEC.
All field wiring must comply with NEC and local

requirements.
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. 12.

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

During operation, voltage to compressor terminals must be within
range indicated on unit nameplate (also see Table 3 and 4). On
3--phase units, voltages between phases must be balanced within
2% and the current within 10%. Use the formula shown in Table
3 and 4, Note 2, 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 invalidates any applicable Bryant
warranty.

NOTE: If accessory thru-the-bottom connections and roof curb
are used, refer to the Thru-the-Bottom Accessory Installation
Instructions for information on wiring the unit.

WARNING

Field Control W

iring

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 through connector on unit to low-voltage
connections (shown in Fig. 10).

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gauge) insulated wire (35_Cminimum).For50to75ft,use
no. 16 AWG insulated wire (35_C minimum). For over 75 ft, use
no. 14 AWG insulated wire (35_C minimum). All wires larger
than no. 18 AWG cannot be directly connected to the thermostat
and will require a junction box and splice at the thermostat.

1. Connect thermostat wires to screw terminals of low
voltage terminal board.

2. Pass the control wires through the hole provided in the
control box.

3. Some models may be equipped with a raceway built into
the corner post on the left side of control box (See Fig.

12.) This raceway provides the required clearance between
high-- voltage and low voltage wiring. For models without
a raceway, ensure to provide the NEC required clearance
between high-- voltage and low--voltage wiring.

Heat Anticipator

Settings

Set heat anticipator settings at 0.8 amp for first stage and 0.3 for
second stage heating.

W1

W2

IPD/X

R

G

Y1

Y2

C

WIRE
CONNECTIONS
TO
LOW-VOLTAGE
SECTION

C06008

COOL STAGE 1

FAN

HEAT STAGE 1

COOL STAGE 2

HEAT STAGE 2

24 VAC HOT

24 VAC COM

N/A

OUTDOOR AIR

SENSOR

THERMOSTATDIPSWITCH SETTINGS

ON
OFF

A

LEGEND

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

B

C

Field Wiring

Y1/W2

G

W/W1

Y/Y2

O/W2

R

C

S1

S2

D

Fig. 10 --- Low--Voltage Connections With or

Without Economizer or Two--Position Damper

8

Table 1—Physical Data 551B

A

/B(

)

MotorPulleyPitchDiameterA/B(i

n.)

f

SpeedChangeperFullTurno

f

MovablePulleyMaximumFul

l

BASE UNIT 551B 036 048 060 072
NOMINAL CAPACITY (nominal tons)
OPERATING WEIG HT (lb)

Unit
Perfect Humidity Adaptive Dehumidification System
EconoMi$er IV
Roof Curb

COMPRESSOR

Quantity
Oil (oz)

REFRIGERANT TYPE

Expansion Device
Operating Charge (lb-oz)

Standard Unit
Unit With Perfect Humidity Adaptive Dehumidification System

CONDENSER FAN

Quantity...Diameter (in.)
Nominal Cfm
Motor Hp...Rpm
Watts Input (Total)

CONDENSER COIL

Rows...Fins/in.
Tot a l Fac e A rea (s q f t)

EVAPORATOR COIL

Standard Unit

Rows...Fins/in.
Tot a l Fac e A rea (s q f t)

Unit with Perfect Humidity Adaptive Deh umidification System

Rows...Fins/in.
Tot a l Fac e A rea (s q f t)

EVAPORATOR FAN

Quantity...Size (in.)
Nominal Cfm
Maximum Continuous Bhp Std

Hi-Static

Motor Frame Size Std

Hi-Static

Fan Rpm Range Std

Hi-Static
Motor Bearing Type
Maximum Fan Rpm
Motor PulleyPitch Diameter

in.

Hi-Static
Nominal Motor Shaft Diameter (in.) Std

Hi-Static
Fan Pulley Pitch Diameter (in.) Std

Hi-Static
Belt — Type...Length (in.) Std

Hi-Static
Pulley Center Line Distance (in.)
Speed Changeper Full Turn o

Movable Pulley Flange (rpm)

Movable PulleyMaximum Full

Turns from Closed Position

Hi-Static

Hi-Static
Factory Setting — Full Turns Open Std

Hi-Static
Factory Speed Setting (rpm) Std

Hi-Static
Fan Shaft Diameter at Pulley (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief
Cutout
Reset (Auto.)

LOSS -OF-CHARGE/LOW-PRESSURE

SWITCH (Liquid LIne) (psig)

Cutout
Reset (Auto.)

FREEZE PROTECTION THERMOSTAT

Opens (F)
Closes (F)

OUTDOOR-AIR INLET SCREENS
RETURN-AIR FILTERS

Quantity...Size (in.)

Std

Std

Std

3 4 5 6

435 445 465 540

15 23 25 29
50 50 50 50

115 115 115 115

Scroll

1 1 1 1

42 53 50 60

R-22

Acutrol Metering Device

5-8 10-2 10-0 12- 8

12-5 18-8 20-5 23-14

Propeller

1...22 1...22 1...22 1...22
3500 3500 4100 4100

1

/8...825

1

/8...825

1

/4...1100

1

/4...1100

180 180 320 320

3/8---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins

1...17 2...17 2...17 2...17

14.6 16.5 16.5 21.3
3/8---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins

2...15 2...15 4...15 4...15

5.5 5.5 5.5 7.3

1...17 2...17 2...17 2...17

3.9 3.9 3.9 5.2
Centrifugal Type, Belt Drive

1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10
1200 1600 2000 2400

1.20

2.40
48
56

680-1044

1075-1455

1.20 1.30/2.40* 2.40

2.40 2.90 2.90
48 56 56
56 56 56

770-1185 1035-1460/1035 ---1460* 1120-1585

1075-1455 1300-1685 1300-1685

Ball Ball Ball Ball

2100 2100 2100 2100

1.9/2.9

2.8/3.8

1/

2

5

/

8

4.5

4.5

1...A...36

1...A...39

1.9/2.9 2.4/3.4 2.4/3.4

2.8/3.8 3.4/4.4 3.4/3.4

1

/

2

5

/

8

4.0 4.0 3.7

5

/

8

7/

8

5
7

4.5 4.5 4.5

1...A...36 1....4...40 1...A...38

1...A...39 1...A...40 1...A...40

10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5
65
65

5
6
3

1

3

826

1233

5

/

/

2

8

70 75 95
65 60 60

5 6 5
6 5 5
3 3 3

31/

2

936 1248 1304

1233 1396 1396

5

/

8

31/

2

5

/

8

31/

5

450  50

428
320

7  3

22  5

30
45

Cleanable. Screen quantity and size varies with option selected.

Throwaway

2...16 x 25 x 2

2...16 x 16 x 2

551B,C

/

8

/

8

2

/

8

LEGEND

Bhp — Brake Horsepower

*Single phase/thre e phase.

9

Table 2—Physical Data 551C

A

/B(

)

MotorPulleyPitchDiameterA/B(i

n.)

f

SpeedChangeperFullTurno

f

MovablePulleyMaximumFul

l

BASE UNIT 551C 024 036 048 060
NOMINAL CAPACITY (nominal tons)
OPERATING WEIG HT (lb)

Unit
Perfect Humidity Adaptive Dehumidification System
EconoMi$er IV
Roof Curb

COMPRESSOR

Quantity
Oil (oz)

REFRIGERANT TYPE

Expansion Device
Operating Charge (lb-oz)

Standard Unit
Unit With Perfect Humidity Adaptive Dehumidification System

CONDENSER FAN

Quantity...Diameter (in.)
Nominal Cfm
Motor Hp...Rpm
Watts Input (Total)

CONDENSER COIL

Rows...Fins/in.

551B,C

Tot a l Fac e A rea (s q f t)

EVAPORATOR COIL

Standard Unit

Rows...Fins/in.
Tot a l Fac e A rea (s q f t)

Unit with Perfect Humidity Adaptive Deh umidification System

Rows...Fins/in.
Tot a l Fac e A rea (s q f t)

EVAPORATOR FAN

Quantity...Size (in.)
Nominal Cfm
Maximum Continuous Bhp Std

Motor Frame Size Std

Motor Rpm
Fan Rpm Range Std

Motor Bearing Type
Maximum Fan Rpm
Motor PulleyPitch Diameter

in.

Nominal Motor Shaft Diameter (in.) Std

Fan Pulley Pitch Diameter (in.) Std

Belt — Type...Length (in.) Std

Pulley Center Line Distance (in.)
Speed Changeper Full Turn o

Movable Pulley Flange (rpm)

Movable PulleyMaximum Full

Turns from Closed Position

Factory Setting — Full Turns Open Std

Factory Speed Setting (rpm) Std

Fan Shaft Diameter at Pulley (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief
Cutout
Reset (Auto.)

LOSS -OF-CHARGE/LOW-PRESSURE

SWITCH (Liquid LIne) (psig)

Cutout
Reset (Auto.)

FREEZE PROTECTION THERMOSTAT

Opens (F)
Closes (F)

OUTDOOR-AIR INLET SCREENS
RETURN-AIR FILTERS

Quantity...Size (in.)

Hi-Static

Hi-Static

Hi-Static

Std

Hi-Static

Hi-Static

Hi-Static

Hi-Static

Std

Hi-Static

Std

Hi-Static

Hi-Static

Hi-Static

2 3 4 5

435 445 465 635

13 15 23 25
50 50 50 50

115 115 115 115

Scroll

1 1 1 1

25 42 56 53

R-22

Acutrol Metering Device

5 --- 3 7 --- 1 1 8 --- 8 12 ---11

1 0 --- 2 14 --- 0 14 ---13 2 1 --- 0

Propeller

1...22 1...22 1...22 1...22
3000 3500 3500 4100

1

/8...825

1

/8...825

1

/8...825

180 180 180 320

3/8---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins

1...17 1...17 2...17 2...17

14.6 14.6 16.5 16.5
3/8---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins

2...15 2...15 2...15 4...15

4.2 5.5 5.5 5.5

1...17 1...17 2...17 2...17

3.5 3.9 3.9 3.9
Centrifugal Type, Belt Drive

1...10 x 10 1...10 x 10 1...10 x 10 1...10 x 10
800 1200 1600 2000

0.58

1.20 1.20 1.30/2.40*

2.40 2.40 2.90

48

48 48 48/56*
56 56 56

1620 1620 1620 1725

400-1000

680-1044 770-1185 1035-1460

1075-1455 1075-1455 1300-1685

Ball Ball Ball Ball

1620 2100 2100 2100

2.4/3.2

5

/

8

7

/

8

4.0

4.5

1...A...36

1.9/2.9 1.9/2.0 2.4/3.4

2.8/3.8 2.8/3.8 3.4/4.4

1/

2

5

/

8

4.5 4.0 4.0

1

/

2

5

/

8

4.5 4.0 4.5

1...A...36 1...A...36 1....4...40

1...A...39 1...A...39 1...A...40

10.0---12.4 10.0-12.4 10.0-12.4 14.7-15.5

60

65 70 75
65 65 60

5

5 5 6
6 6 5
3 3 3

31/

2

826 936 1248

1233 1233 1396

5

/

8

31/

2

5

/

8

756

5

3

/

8

450  50

428
320

7  3

22  5

30
45

Cleanable. Screen quantity and size varies with option selected.

Throwaway

2...16 x 25 x 2

1

/4...1100

5

/

5

/

31/

5

/

8
8

2

8

LEGEND

Bhp — Brake Horsepower

*Single phase/thre e phase.

***These units do NOT meet the California low NOx requirements.

†††California SCAQMD compliant low NOxmodels have co mbustion products that are

controlled to 40 nanograms per joule or less.

10

208/230-1-60

208/230-3-60

460-3-60

(SIZES 060 AND 072)

551B,C

575-3-60

(SIZES 060 AND 072)

208/230-3-60

(SIZES 036 AND 048)

C—Contactor
COMP — Compressor
IFC — Indoor (Evaporator) Fan Contactor
NEC — National Electrical Code
TB — Terminal Block

LEGEND

LOW VOLTAGE
CONNECTIONS

INTEGRATED GAS UNIT
CONTROLLER (IGC)

575-3-60

(SIZES 036 AND 048)

460-3-60

(SIZES 036 AND 048)

Fig. 11 --- Power Wiring Connections

C06158

Fig. 12 --- Field Control Wiring Raceway

C06125

11

NO1

8

72541

1

0.963.010.7

2.0

208/230

160

STD

024

/

(2ton

s

)

Y

ES1

8

72541

1

0.963.010.7

2.0

NO1

8

72541

16088010749

208/230

160

STD

/

Y

ES1

8

72541

16088010749

Y

NO1

8

72541

10377010749

STD

Y

ES1

8

72541

10377010749

Y

036

208/230

360

(3ton

s

)

/

NO1

8

72541

10377010758

H

S

Y

ES1

8

72541

10377010758

Y

NO4

1

45081

5.139.010.4

2.2

460

360

STD

Y

ES4

1

45081

5.139.010.4

2.2

551B,C

FLA LRA

MOCP**

FLA MC A

kW†

Actual

Table 3—Electrical Data-- 551C

VOLTAGE RANGE COMPRESSOR (each) OUTDOOR FAN ELECTRIC HEAT POWER SUPPLY * DISCONNECT SIZE

NONE —/ — —/— 16.3/16.3 20/20 16/16 69/69

or B00

001A00 3.3/ 4.0 15.9/18.3 22.4/25.4 25/ 30 21/23 69/69

--- --- --- A 0 0

CRHEATER

IFM

FLA

Min Max QTY RLA LRA QTY FLA

NONE —/ — —/— 22.3/22.3 25/25 21/21 73/73

002A00 4.9/ 5.8 23.5/27.1 31.8/36.4 35/ 40 29/33 69/69

001A00 3.3/ 4.0 15.9/18.3 27.4/30.4 30/ 35 26/29 73/73

003B00 6.5/ 8.0 31.4/36.3 41.8/47.8 45/50 38/44 69/69

004B00 7.9/ 9.6 37.9/43.8 49.9/57.2 50/60 46/53 69/69

NONE —/ — —/— 25.6/25.6 30/30 25/25 101/101

002A00 4.9/ 5.8 23.5/27.1 36.8/41.4 40/ 45 35/39 73/73

001A00 3.3/ 4.0 15.9/18.3 26.0/29.0 30/ 30 25/27 101/101

003B00 6.5/ 8.0 31.4/36.3 46.8/52.8 50/60 44/50 73/73

002A00 4.9/ 5.8 23.5/27.1 35.5/40.0 40/ 40 33/37 101/101

004B00 7.9/ 9.6 37.9/43.8 54.9/62.2 60/70 51/58 73/73

003B00 6.5/ 8.0 31.4/36.3 45.4/51.4 50/60 42/47 101/101

004B00 7.9/ 9.6 37.9/43.8 53.5/60.8 60/70 49/56 101/101

002,002 9.8/11.6 46.9/54.2 64.8/73.8 70/80 60/68 101/101

NONE —/ — —/— 31.6/31.6 35/35 30/30 106/106

001A00 3.3/ 4.0 15.9/18.3 31.6/34.0 35/ 35 30/32 106/106

002A00 4.9/ 5.8 23.5/27.1 40.5/45.0 45/ 45 38/42 106/106

003B00 6.5/ 8.0 31.4/36.3 50.4/56.4 60/60 47/53 106/106

004B00 7.9/ 9.6 37.9/43.8 58.5/65.8 60/70 55/61 106/106

002,002 9.8/11.6 46.9/54.2 69.8/78.8 70/80 65/73 106/106

NONE —/ — —/— 18.5/18.5 25/25 18/18 90/90

001A00 3.3/ 4.0 9.2/10.6 18.5/19.4 25/25 18/18 90/90

002A00 4.9/ 5.8 13.6/15.6 23.1/25.7 25/ 30 21/24 90/90

NONE —/ — —/— 24.5/24.5 30/30 24/24 95/95

005A00 12/14.7 33.4/38.5 47.8/54.2 50/60 44/50 90/90

001A00 3.3/ 4.0 9.2/10.6 24.5/24.5 30/30 24/24 95/95

003B00 6.5/ 8.0 18.1/20.9 28.8/32.3 30/35 26/30 90/90

004B00 7.9/ 9.6 21.9/25.3 33.5/37.7 35/40 31/35 90/90

002A00 4.9/ 5.8 13.6/15.6 28.1/30.7 30/ 35 27/29 95/95

NONE —/ — —/— 19.4/19.4 25/25 19/19 120/120

005A00 12/14.7 33.4/38.5 52.8/59.2 60/60 50/55 95/95

001A00 3.3/ 4.0 9.2/10.6 19.4/20.5 25/25 19/19 120/120

003B00 6.5/ 8.0 18.1/20.9 33.8/37.3 35/40 32/35 95/95

004B00 7.9/ 9.6 21.9/25.3 38.5/42.7 40/45 36/40 95/95

002A00 4.9/ 5.8 13.6/15.6 24.2/26.8 30/ 30 22/25 120/120

003B00 6.5/ 8.0 18.1/20.9 29.9/33.4 35/35 28/31 120/120

004B00 7.9/ 9.6 21.9/25.3 34.6/38.8 35/40 32/36 120/120

005A00 12/14.7 33.4/38.5 48.9/55.4 50/60 45/51 120/120

NONE —/ — —/— 25.4/25.4 30/30 25/25 124/124

001A00 3.3/ 4.0 9.2/10.6 25.4/25.5 30/30 25/25 124/124

002A00 4.9/ 5.8 13.6/15.6 29.2/31.8 35/ 35 28/30 124/124

003B00 6.5/ 8.0 18.1/20.9 34.9/38.4 40/40 33/36 124/124

004B00 7.9/ 9.6 21.9/25.3 39.6/43.8 40/45 37/41 124/124

005A00 12/14.7 33.4/38.5 53.9/60.4 60/70 51/56 124/124

NONE — — 9.0 15.0 9.0 46.0

006A00 5.5 7.2 11.8 15.0 11.0 46.0

NONE — — 11.7 15.0 11.0 48.0

007A00 8.1 10.6 16.0 20.0 15.0 46.0

008A00 10.6 13.8 20.0 25.0 18.0 46.0

009A00 12.9 16.8 23.8 25.0 22.0 46.0

006A00 5.5 7.2 15.1 20.0 13.0 48.0

007A00 8.1 10.6 19.4 20.0 17.0 48.0

008A00 10.6 13.8 23.4 25.0 21.0 48.0

009A00 12.9 16.8 27.2 30.0 24.0 48.0

CONV

IFM

Nominal

UNIT SIZE

2 3 0 --- 1 --- 6 0 STD

208

ES 187 254 1 16.0 88.0 1 0.7 4.9

NO 187 254 1 10.3 77.0 1 0.7 4.9

NO 187 254 1 10.9 63.0 1 0.7 2.0

OUTLET

TYPE

V --- P h --- H z

024

YES 187 254 1 10.9 63.0 1 0.7 2.0

2 3 0 --- 1 --- 6 0 STD

208

(2 tons)

NO 187 254 1 16.0 88.0 1 0.7 4.9

STD

ES 187 254 1 10.3 77.0 1 0.7 4.9

036

NO 187 254 1 10.3 77.0 1 0.7 5.8

2 3 0 --- 3 --- 6 0

208

(3 tons)

HS

ES 187 254 1 10.3 77.0 1 0.7 5.8

NO 414 508 1 5.1 39.0 1 0.4 2.2

YES 414 508 1 5.1 39.0 1 0.4 2.2

4 6 0 --- 3 --- 6 0 STD

12

FLA LRA

NO414

5

0

815.139.010.4

2.6

460

360

H

S

036

Y

E

S4145

0

815.139.010.4

2.6

(3ton

s

)

S

T

D

518

6

3

21423101041

9

575

360

H

SNO518

6

3

214

2

10420

518

6

3

214

2

10426

P

erf

e

c

t

MOCP**

FLA MC A

kW†

Actual

551B,C

NONE — — 9.4 15.0 9.0 60.0

or B00

006A00 5.5 7.2 12.3 15.0 11.0 60.0

--- --- --- A 0 0

CRHEATER

IFM

FLA

NONE — — 12.1 15.0 12.0 62.0

007A00 8.1 10.6 16.5 20.0 15.0 60.0

008A00 10.6 13.8 20.5 25.0 19.0 60.0

009A00 12.9 16.8 24.3 25.0 22.0 60.0

006A00 5.5 7.2 15.6 20.0 14.0 63.0

NONE — — 7.6 10 7 35

NONE — — 9.7 15 9 36

NONE — — 7.7 10 8 40

NONE — — 9.8 15 10 42

NONE — — 7.7 10 8 48

007A00 8.1 10.6 19.9 20.0 18.0 63.0

008A00 10.6 13.8 23.9 25.0 21.0 63.0

009A00 12.9 16.8 27.7 30.0 25.0 63.0

NONE — — 9.8 15 10 49

31.0

31.0

Table 3 — Electrical Data--551C (cont)

518 632 1 4.2 31.0 1 0.4 1.9

518 632 1 4.2 1 0.4 2.0

Min Max QTY RLA LRA QTY FLA

VOLTAGE RANGE COMPRESSOR (each) OUTDOOR FAN ELECTRIC HEAT POWER SUPPLY * DISCONNECT SIZE

518 632 1 4.2 1 0.4 2.6

CONV

IFM

Nominal

UNIT SIZE

NO 414 508 1 5.1 39.0 1 0.4 2.6

OUTLET

TYPE

V --- P h --- H z

4 6 0 --- 3 --- 6 0 HS

NO

036 YES 414 508 1 5.1 39.0 1 0.4 2.6

(3 tons)

STD

YES

5 7 5 --- 3 --- 6 0 HS

YES

NO

Perfe ct

YES

Humidity

13

UNITNOMIN

ALIFM

CON

V

IFM

N

O1972

5

4

121

011501154

9

208/230160STD

/

Y

ES19725

4

121

011501154

9

Y

N

O1872

5

4

114

195.011.5

4.9

STD

Y

ES18725

4

114

195.011.5

4.9

208/23036

0

/

N

O1872

5

4

114

195.011.5

5.8

H

S

048

(4ton

s

)

Y

ES18725

4

114

195.011.5

5.8

N

O4145

0

817.1

4

5.010.8

2.2

STD

Y

ES41450

817.1

4

5.010.8

2.2

46036

0

N

O4145

0

817.1

4

5.010.8

2.6

H

S

Y

ES41450

817.1

4

5.010.8

2.6

STDNO51863

216

1

3801061

9

57536

0

H

SNO51863

216

1

3801062

0

51863

216

1

3801082

6

Per

f

ect

551B,C

Actual kW{ FLA MCA MOCP** FLA LRA

ELECTRI C HEAT POWER SUPPLY DISCONNECT SIZE

B00

NONE —/— —/— 32.7/32.7 40/40 32/32 130/130

001A00 3.3/ 4.0 15.9/18.3 32.7/32.7 40/40 32/ 32 130/130

003B00 6.5/ 8.0 31.4/36.3 45.4/51.4 50/60 42/47 130/130

--- --- A 0 0 o r

CRHEATER

IFM

FLA

002,002 9.8/ 11.6 46.9/54.2 64.8/73.8 70/80 60/68 130/130

003,003 13.1/ 16 62.8/72.5 84.7/96.8 90/100 78/89 130/130

004,004 16.0/ 19.3 75.8/87.5 100.9/115.5 110/125 93/106 130/130

NONE —/— —/— 38.7/38.7 45/45 37/37 135/135

001A00 3.3/ 4.0 15.9/18.3 38.7/38.7 45/45 37/ 37 135/135

003B00 6.5/ 8.0 31.4/36.3 50.4/56.4 60/60 47/53 135/135

002,002 9.8/ 11.6 46.9/54.2 69.8/78.8 70/80 65/73 135/135

003,003 13.1/ 16 62.8/72.5 89.7/101.8 90/110 83/ 95 135/135

004,004 16.0/ 19.3 75.8/87.5 105.9/120.5 110/125 98/112 135/135

NONE —/— —/— 24.0/24.0 30/30 24/24 110/110

002A00 4.9/ 5.8 13.6/15.6 24.0/25.7 30/30 24/ 24 110/110

003B00 6.5/ 8.0 18.1/20.9 28.8/32.3 30/35 26/30 110/110

005A00 12/ 14.7 33.4/38.5 47.8/54.2 50/60 44/50 110/110

004,004 16/ 19.3 43.8/50.5 60.8/69.3 70/70 56/64 110/110

NONE —/— —/— 30.0/30.0 35/35 29/29 115/115

002A00 4.9/ 5.8 13.6/15.6 30.0/30.7 35/35 29/ 29 115/115

003B00 6.5/ 8.0 18.1/20.9 33.8/37.3 35/40 32/35 115/115

005A00 12/ 14.7 33.4/38.5 52.8/59.2 60/60 50/55 115/115

004,004 16/ 19.3 43.8/50.5 65.8/74.3 70/80 62/69 115/115

NONE —/— —/— 24.9/24.9 30/30 25/25 140/140

002A00 4.9/ 5.8 13.6/15.6 24.9/26.8 30/30 25/ 25 140/140

003B00 6.5/ 8.0 18.1/20.9 29.9/33.4 35/35 28/31 140/140

005A00 12/ 14.7 33.4/38.5 48.9/55.4 50/60 45/51 140/140

004,004 16/ 19.3 43.8/50.5 62.0/70.4 70/80 57/65 140/140

NONE —/— —/— 30.9/30.9 35/35 30/30 145/145

002A00 4.9/ 5.8 13.6/15.6 30.9/31.8 35/35 30/ 30 145/145

003B00 6.5/ 8.0 18.1/20.9 34.9/38.4 40/40 33/36 145/145

005A00 12/ 14.7 33.4/38.5 53.9/60.4 60/70 51/56 145/145

004,004 16/ 19.3 43.8/50.5 67.0/75.4 70/80 63/70 145/145

NONE — — 11.9 15.0 12.0 53.0

006A00 5.5 7.2 11.9 15.0 12.0 53.0

NONE — — 14.6 20.0 14.0 55.0

008A00 10.6 13.8 20.0 25.0 18.0 53.0

009A00 12.9 16.8 23.8 25.0 22.0 53.0

006A00 5.5 7.2 15.1 20.0 14.0 55.0

008,008 21.1 27.7 37.3 40.0 34.0 53.0

NONE — — 12.3 15.0 12.0 67.0

008A00 10.6 13.8 23.4 25.0 21.0 55.0

009A00 12.9 16.8 27.2 30.0 24.0 55.0

006A00 5.5 7.2 12.3 15.0 12.0 67.0

008,008 21.1 27.7 40.7 45.0 37.0 55.0

NONE — — 15.0 20.0 15.0 69.0

008A00 10.6 13.8 20.5 25.0 19.0 67.0

009A00 12.9 16.8 24.3 25.0 22.0 67.0

006A00 5.5 7.2 15.6 20.0 15.0 70.0

008,008 21.1 27.7 37.8 40.0 35.0 67.0

NONE — — 10.1 15 10 44

NONE — — 12.3 15 12 45

NONE — — 10.2 15 10 50

NONE — — 12.4 15 12 52

NONE — — 10.3 15 10 55

008A00 10.6 13.8 23.9 25.0 21.0 70.0

009A00 12.9 16.8 27.7 30.0 25.0 70.0

008,008 21.1 27.7 41.2 45.0 37.0 70.0

NONE — — 12.5 15 12 57

Table 3 — Electrical Data--551C (cont)

.

COMPRESSOR (each) OUTDOOR FAN

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

2 3 0 --- 1 --- 6 0 STD

208

ES 197 254 1 21.0 115.0 1 1.5 4.9

NO 187 254 1 14.1 95.0 1 1.5 4.9

CONV

OUTLET

IFM

TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

NO 197 254 1 21.0 115.0 1 1.5 4.9

STD

.

YES 187 254 1 14.1 95.0 1 1.5 4.9

2 3 0 --- 3 --- 6 0

208

.

NO 187 254 1 14.1 95.0 1 1.5 5.8

HS

048

.

518 632 1 6.1 38.0 1 0.6 1.9

518 632 1 6.1 38.0 1 0.6 2.0

518 632 1 6.1 38.0 1 0.8 2.6

YES 187 254 1 14.1 95.0 1 1.5 5.8

(4 tons)

NO 414 508 1 7.1 45.0 1 0.8 2.2

YES 414 508 1 7.1 45.0 1 0.8 2.2

STD

NO 414 508 1 7.1 45.0 1 0.8 2.6

4 6 0 --- 3 --- 6 0

YES 414 508 1 7.1 45.0 1 0.8 2.6

HS

STD

YES

5 7 5 --- 3 --- 6 0 HS

YES

NO

Perfe ct

YES

Humimdity

14

UNITNOMIN

ALI

FMCON

V

IFM

N

O187254

1

250

150011566

208/23016

0

S

T

D

/

Y

E

S187254

1

250

150011566

Y

N

O187254

1

1

7.3

123.011.5

5.8

060

(

t

o

ns)

S

T

D

Y

E

S187254

1

173

123011558

Y

208/23036

0

N

O187254

1

173

123011575

H

S

Y

E

S187254

1

173

123011575

Y

004005199/243552/638834/94190

/10078/87192/19

2

/

/

/

/

/

/

192

87 192

100 78

94.1 90

63.8 83.4

24.3 55.2

Actual kW{ FLA MCA MOCP** FLA LRA

ELECTRI C HEAT POWER SUPPLY DISCONNECT SIZE

B00

NONE —/— —/— 39.4/39.4 50/50 38/38 187/187

002A00 4.9/ 5.8 23.5/ 27.1 39.4/42.1 50/50 38/39 187/187

003B00 6.5/ 8.0 31.4/36.3 47.5/ 53.6 50/60 44/49 187/187

--- --- A 0 0 o r

CRHEATER

IFM

FLA

02,002 8.7/ 11.6 46.9/54.2 66.9/76.0 70/80 62/ 70 187/ 187

003,003 13.0/ 16.0 62.8/72.5 86.8/98.9 90/100 80/91 187/187

004,004 15.8/ 19.3 75.8/87.5 103.0/117.6 60/50 95/108 187/187

NONE —/— —/— 45.4/45.4 60/50 44/44 191/191

002A00 4.9/ 5.8 23.5/ 27.1 45.4/47.1 60/60 44/44 191/191

003B00 6.5/ 8.0 31.4/36.3 52.5/ 58.6 80/90 49/55 191/191

02,002 8.7/ 11.6 46.9/54.2 71.9/81.0 100/110 67/75 191/191

003,003 13.0/ 16.0 62.8/72.5 91.8/103.9 110/125 85/96 191/191

004,004 15.8/ 19.3 75.8/87.5 108.0/122.6 90/100 100/114 191/191

002A00 4.9/ 5.8 13.6/ 15.6 28.9/28.9 35/35 28/28 168/168

004B00 7.9/ 9.6 21.9/25.3 34.6/ 38.8 35/40 32/36 168/168

005A00 12.0/ 14.7 33.4/38.5 48.9/55.4 50/60 45/51 168/168

004,004 15.8/ 19.3 43.8/50.5 62.0/70.4 70/80 57/65 168/168

004,005 19.9/ 24.3 55.2/63.8 76.3/86.9 80/90 70/80 168/168

NONE —/— —/— 34.9/34.9 40/40 34/34 173/173

002A00 4.9/ 5.8 13.6/ 15.6 34.9/34.9 40/40 34/34 173/173

004B00 7.9/ 9.6 21.9/25.3 39.6/ 43.8 40/45 37/41 173/173

005A00 12.0/ 14.7 33.4/38.5 53.9/60.4 60/70 51/56 173/173

004,004 15.8/ 19.3 43.8/50.5 67.0/75.4 70/80 63/70 173/173

004,005 19.9/ 24.3 55.2/63.8 81.3/91.9 90/100 76/86 173/173

NONE —/— —/— 30.6/30.6 35/35 30/30 187/187

002A00 4.9/ 5.8 13.6/ 15.6 30.6/30.6 35/35 30/30 187/187

004B00 7.9/ 9.6 21.9/25.3 36.7/ 40.9 40/45 34/38 187/187

005A00 12.0/ 14.7 33.4/38.5 51.1/57.5 60/60 47/53 187/187

004,004 15.8/ 19.3 43.8/50.5 64.1/72.5 70/80 59/67 187/187

004,005 19.9/ 24.3 55.2/63.8 78.4/89.1 80/90 72/82 187/187

NONE —/— —/— 36.6/36.6 40/40 36/36 192/192

002A00 4.9/ 5.8 13.6/ 15.6 36.6/36.6 40/40 36/36 192/192

004B00 7.9/ 9.6 21.9/25.3 41.7/ 45.9 45/50 39/43 192/192

005A00 12.0/ 14.7 33.4/38.5 56.1/62.5 60/70 53/58 192/192

004,004 15.8/ 19.3 43.8/50.5 69.1/77.5 70/80 65/72 192/192

004,005 19.9

551B,C

Table 3 — Electrical Data--551C (cont)

COMPRESSOR (each) OUTDOOR FAN

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

CONV

OUTLET

IFM

TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

2 3 0 --- 1 --- 6 0 STD

208

ES 187 254 1 25.0 150.0 1 1.5 6.6

NO 187 254 1 17.3 123.0 1 1.5 5.8

NO 187 254 1 25.0 150.0 1 1.5 6.6

060

STD

(tons)

ES 187 254 1 17.3 123.0 1 1.5 5.8

NO 187 254 1 17.3 123.0 1 1.5 7.5

208/230--- 3--- 60

ES 187 254 1 17.3 123.0 1 1.5 7.5

HS

15

UNITNOMIN

ALI

FMCON

V

IFM

N

O414508

18470010826

S

T

D

Y

E

S414508

18470010826

Y

46036

0

060

(

t

o

ns)

N

O414508

18470010834

H

S

Y

E

S414508

18470010834

Y

STDNO51863

2

171

5301062

0

57536

0

H

SNO51863

2

171

5301062

8

060

(

t

o

ns)

51863

2

171

5301083

4

Per

f

ect

551B,C

Actual kW{ FLA MCA MOCP** FLA LRA

ELECTRI C HEAT POWER SUPPLY DISCONNECT SIZE

B00

NONE — — 13.9 20.0 14.0 92.0

006A00 5.5 7.2 13.9 20.0 14.0 92.0

008A00 10.6 13.8 20.5 25.0 19.0 92.0

--- --- A 0 0 o r

CRHEATER

IFM

FLA

NONE — — 16.6 20.0 16.0 94.0

009A00 12.9 16.8 24.3 25.0 22.0 92.0

006A00 5.5 7.2 16.6 20.0 16.0 95.0

008,008 21.1 27.7 37.8 40.0 35.0 92.0

008A00 10.6 13.8 23.9 25.0 21.0 95.0

008,009 23.4 30.1 40.8 45 38 92

NONE — — 14.7 20.0 14.0 101.0

009A00 12.9 16.8 27.7 30.0 25.0 95.0

006A00 5.5 7.2 14.7 20.0 14.0 102.0

008,008 21.1 27.7 41.2 45.0 37.0 95.0

008A00 10.6 13.8 21.5 25.0 20.0 102.0

008,009 23.4 30.1 44.2 45 40 95

NONE — — 17.4 20.0 17.0 104.0

009A00 12.9 16.8 25.3 30.0 23.0 102.0

006A00 5.5 7.2 17.4 20.0 17.0 104.0

008,009 23.4 30.1 41.8 45 38 102

008A00 10.6 13.8 24.9 25.0 22.0 104.0

008,008 21.1 27.7 38.8 40.0 36.0 102.0

NONE — — 11.5 15 11 65

NONE — — 13.6 15 13 67

NONE — — 12.3 15 12 74

NONE — — 14.4 20 14 76

NONE — — 12.2 15 12 78

009A00 12.9 16.8 28.7 30.0 26.0 104.0

008,008 21.1 27.7 42.2 45.0 38.0 104.0

008,009 23.4 30.1 45.2 50 41 104

NONE — — 14.4 20 14 80

Table 3 — Electrical Data--551C (cont)

COMPRESSOR (each) OUTDOOR FAN

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

CONV

OUTLET

NO 414 508 1 8.4 70.0 1 0.8 2.6

ES 414 508 1 8.4 70.0 1 0.8 2.6

NO 414 508 1 8.4 70.0 1 0.8 3.4

ES 414 508 1 8.4 70.0 1 0.8 3.4

518 632 1 7.1 53.0 1 0.6 2.0

YES

518 632 1 7.1 53.0 1 0.6 2.8

518 632 1 7.1 53.0 1 0.8 3.4

NO

YES

YES

IFM

TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

STD

060

4 6 0 --- 3 --- 6 0

(tons)

HS

STD

060

5 7 5 --- 3 --- 6 0 HS

Perfe ct

Humimdity

HACR --- Heating, Air Conditioning an d Refrigeration

IFM --- Indoor (Evaporator) Fan Motor

LRA --- Locked Rotor Amps

MCA --- Mini mum Circuit Amps

MOCP -- - Maxim um Overcurren t Pro tection

NEC --- National Electrical Code

OFM --- Outdoor (Condenser) Fan Motor

RLA --- Rated Load Amps

* The values listed in this table do not include power exhaust. See power exhaust table for power exhaust requirements.

** Fu se or HACR breaker

FLA ---Fu ll Load Amps

(tons)

{ H eater capac ity (kW) is based on h eater voltage of 240v, 480v or 575v. If power distribution voltage to unit varies from rated heater voltage, heater kW will va ry ac cordingly

NOTES:

16

UNITN

O

M

I

N

A

LCONV

IFM

FLA LRA

N

O18

7

2541168810749

208/230

160ST

D

/

Y

ES187

2541168810749

Y

N

O18

7

254

11037710749

STD

036

(

3

t

o

ns)

Y

ES187

254

11037710749

Y

208/230

360

/

N

O18

7

254

11037710758

H

S

Y

ES187

254

11037710758

Y

MOCP**

Table 4—Electrical Data-- 551B

FLA MCA

kW†

Actual

ELECTRI C HEAT POWER SUPPLY * DISCONNECT SIZE

— —/ — —/ — 25.6/ 25.6 30/ 30 25/ 25 101/ 101

001 3.3/ 4.0 15.9/ 18.3 26.0/ 29.0 30/ 30 25/ 27 101/ 101

002 4.9/ 5.8 23.5/ 27.1 35.5/ 40.0 40/ 40 33/ 37 101/ 101

B00

--- --- A 0 0 o r

CRHEATER

FLA

IFM

COMPRESSOR (each) OUTDOOR FAN

003 6.5/ 8.0 31.4/ 36.3 45.4/ 51.4 50/ 50 42/ 47 101/ 101

004 7.9/ 9.6 37.9/ 43.1 53.5/ 60.0 60/ 60 49/ 55 101/ 101

002+002 9.8/ 11.6 46.9/ 54.2 64.8/ 73.8 70/ 80 60/ 68 101/ 101

— —/ — —/ — 31.6/ 31.6 35/ 35 30/ 30 106/ 106

001 3.3/ 4.0 15.9/ 18.3 31.6/ 34.0 35/ 35 30/ 32 106/ 106

002 4.9/ 5.8 23.5/ 27.1 40.5/ 45.0 45/ 45 38/ 42 106/ 106

003 6.5/ 8.0 31.4/ 36.3 50.4/ 56.4 60/ 60 47/ 53 106/ 106

004 7.9/ 9.6 37.9/ 43.1 58.5/ 65.0 60/ 70 55/ 61 106/ 106

002+002 9.8/ 11.6 46.9/ 54.2 69.8/ 78.8 70/ 80 65/ 73 106/ 106

— —/ — —/ — 18.5/ 18.5 25/ 25 18/ 18 90/ 90

001 3.3/ 4.0 9.2/ 10.6 18.5/ 19.4 25/ 25 18/ 18 90/ 90

002 4.9/ 5.8 13.6/ 15.6 23.1/ 25.7 25/ 30 21/ 24 90/ 90

— —/ — —/ — 24.5/ 24.5 30/ 30 24/ 24 95/ 95

003 6.5/ 8.0 18.1/ 20.9 28.8/ 32.3 30/ 35 26/ 30 90/ 90

004 7.9/ 9.6 21.9/ 25.3 33.5/ 37.7 35/ 40 31/ 35 90/ 90

001 3.3/ 4.0 9.2/ 10.6 24.5/ 24.5 30/ 30 24/ 24 95/ 95

002 4.9/ 5.8 13.6/ 15.6 28.1/ 30.7 30/ 35 27/ 29 95/ 95

002+002 9.8/ 14.7 33.4/ 38.5 47.8/ 54.2 50/ 60 44/ 50 90/ 90

— —/ — —/ — 19.4/ 19.4 25/ 25 19/ 19 120/ 120

003 6.5/ 8.0 18.1/ 20.9 33.8/ 37.3 35/ 40 32/ 35 95/ 95

004 7.9/ 9.6 21.9/ 25.3 38.5/ 42.7 35/ 45 36/ 40 95/ 95

001 3.3/ 4.0 9.2/ 10.6 19.4/ 20.5 25/ 25 19/ 19 120/ 120

002 4.9/ 5.8 13.6/ 15.6 24.2/ 26.8 30/ 30 22/ 25 120/ 120

002+002 9.8/ 14.7 33.4/ 38.5 52.8/ 59.2 50/ 60 50/ 55 95/ 95

003 6.5/ 8.0 18.1/ 20.9 29.9/ 33.4 35/ 35 28/ 31 120/ 120

004 7.9/ 9.6 21.9/ 25.3 34.6/ 38.8 35/ 40 32/ 36 120/ 120

002+002 9.8/ 14.7 33.4/ 38.5 48.9/ 55.4 50/ 60 45/ 51 120/ 120

— —/ — —/ — 25.4/ 25.4 30/ 30 25/ 25 124/ 124

001 3.3/ 4.0 9.2/ 10.6 25.4/ 25.5 30/ 30 25/ 25 124/ 124

002 4.9/ 5.8 13.6/ 15.6 29.2/ 31.8 35/ 35 28/ 30 124/ 124

003 6.5/ 8.0 18.1/ 20.9 34.9/ 38.4 40/ 40 33/ 36 124/ 124

004 7.9/ 9.6 21.9/ 25.3 39.6/ 43.8 40/ 45 37/ 41 124/ 124

002+002 9.8/ 14.7 33.4/ 38.5 53.9/ 60.4 60/ 70 51/ 56 124/ 124

551B,C

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

CONV

OUTLET

IFM TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

2 3 0 --- 1 --- 6 0 STD

208

ES 187 254 1 16 88 1 0.7 4.9

NO 187 254 1 10.3 77 1 0.7 4.9

NO 187 254 1 16 88 1 0.7 4.9

036

STD

(3 tons)

ES 187 254 1 10.3 77 1 0.7 4.9

NO 187 254 1 10.3 77 1 0.7 5.8

2 3 0 --- 3 --- 6 0

208

ES 187 254 1 10.3 77 1 0.7 5.8

HS

17

UNITN

O

M

I

N

A

LCONV

IFM

FLA LRA

N

O41

4

508

1

5.1

391

0.4

2.2

STD

Y

ES414

508

1

5.1

391

0.4

2.2

460

3

6

0

036

N

O41

4

508

1

5.1

391

0.4

2.6

(

3

t

o

ns)HS

Y

ES414

508

1

5.1

391

0.4

2.6

STD

575

3

6

0HS

P

e

r

f

ect

MOCP**

551B,C

FLA MCA

kW†

Actual

ELECTRI C HEAT POWER SUPPLY * DISCONNECT SIZE

— — — 9.0 20 9 46

006 5.5 7.2 11.8 20 11 46

B00

--- --- A 0 0 o r

CRHEATER

FLA

IFM

— — — 11.7 20 11 48

007 8.1 10.6 16.0 20 15 46

008 10.6 13.8 20.0 25 18 46

009 12.9 16.8 23.8 25 22 46

006 5.5 7.2 15.1 20 13 48

— — — 9.4 20 9 60

007 8.1 10.6 18.7 20 17 48

008 10.6 13.8 22.7 25 21 48

009 12.9 16.8 26.5 30 24 48

006 5.5 7.2 12.3 20 11 60

— — — 12.1 20 12 62

007 8.1 10.6 16.5 20 15 60

008 10.6 13.8 20.5 25 19 60

009 12.9 16.8 24.3 25 22 60

006 5.5 7.2 15.6 20 14 63

007 8.1 10.6 19.2 20 18 63

008 10.6 13.8 23.2 25 21 63

009 12.9 16.8 27.0 30 25 63

Table 4 — Electrical Data--551B (cont)

COMPRESSOR (each) OUTDOOR FAN

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

CONV

OUTLET

IFM TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

NO 414 508 1 5.1 39 1 0.4 2.2

STD

YES 414 508 1 5.1 39 1 0.4 2.2

HS

4 6 0 --- 3 --- 6 0

036 NO 414 508 1 5.1 39 1 0.4 2.6

(3 tons)

NO 518 632 1 4.2 31 1 0.4 1.9 — — — 7.3 20 7 36

NO 518 632 1 4.2 31 1 0.4 2.0 — — — 7.7 10 8 40

STD

NO 518 632 1 4.2 31 1 0.4 2.6 — — — 7.7 10 8 48

YES 518 632 1 4.2 31 1 0.4 1.9 — — — 9.5 20 9 30

YES 518 632 1 4.2 31 1 0.4 2.0 — — — 9.8 15 10 42

YES 518 632 1 4.2 31 1 0.4 2.6 — — — 9.8 15 10 50

Perfe ct

Humidity

5 7 5 --- 3 --- 6 0 HS

YES 414 508 1 5.1 39 1 0.4 2.6

18

NO19725

4

12371261074

9

208/230

160

STD

/

Y

E

S197254

12371261074

9

Y

NO18725

4

113.59310.7

4.9

STD

Y

E

S187254

113.59310.7

4.9

208/230

360

/

NO18725

4

113.59310.7

5.8

H

S

048

(

4ton)YE

S187254

113.59310.7

5.8

NO41450

8

1

6.446.510.4

2.2

STD

Y

E

S414508

1

6.446.510.4

2.2

460

360

NO41450

8

1

6.446.510.4

2.6

H

S

Y

E

S414508

1

6.446.510.4

2.6

STD

575

360HS

Perfect

551B,C

Actual kW{ FLA MCA MOCP** FLA LRA

— —/— —/— 35.2/ 35.2 45/ 45 34/ 34 139/ 139

001 3.3/ 4.0 15.9/ 18.3 35.2/ 35.2 45/ 45 34/ 34 139/ 139

003 6.5/ 8.0 31.4/ 36.3 45.4/ 51.4 50/ 60 42/ 47 139/ 139

B00

--- --- A 0 0 o r

CRHEATER

IFM

FLA

002+002 9.8/ 11.6 46.9/ 54.2 64.8/ 73.8 70/ 80 60/ 68 139/ 139

003+003 13.1/ 16 62.8/ 72.5 84.7/ 96.8 90/ 100 78/ 89 139/ 139

004+004 16.0/ 19.3 75.8/ 87.5 100.9/ 115.5 110/ 125 93/ 106 139/ 139

— —/— —/— 41.2/ 41.2 50/ 50 39/ 39 144/ 144

001 3.3/ 4.0 15.9/ 18.3 41.2/ 41.2 50/ 50 39/ 39 144/ 144

003 6.5/ 8.0 31.4/ 36.3 50.4/ 56.4 60/ 60 47/ 53 144/ 144

002+002 9.8/ 11.6 46.9/ 54.2 69.8/ 78.8 70/ 80 65/ 73 144/ 144

003+003 13.1/ 16 62.8/ 72.5 89.7/ 101.8 90/ 100 83/ 95 144/ 144

004+004 16.0/ 19.3 75.8/ 87.5 105.9/ 120.5 110/ 125 98/ 112 144/ 144

— —/— —/— 22.5/ 22.5 30/ 30 22/ 22 106/ 106

002 4.9/ 5.8 13.6/ 15.6 23.1/ 25.7 30/ 30 22/ 24 106/ 106

003 6.5/ 8 18.1/ 20.9 28.8/ 32.3 30/ 35 26/ 30 106/ 106

005 12/ 14.7 33.4/ 38.5 47.8/ 54.2 50/ 60 44/ 50 106/ 106

004+004 16/ 19.3 43.8/ 50.5 60.8/ 59.3 70/ 70 56/ 64 106/ 106

— —/— —/— 28.5/ 28.5 35/ 35 27/ 27 111/ 111

002 4.9/ 5.8 13.6/ 15.6 28.5/ 30.7 35/ 35 27/ 29 111/ 111

003 6.5/ 8 18.1/ 20.9 33.8/ 37.3 35/ 40 32/ 35 111/ 111

005 12/ 14.7 33.4/ 38.5 52.8/ 59.2 60/ 60 50/ 55 111/ 111

004+004 16/ 19.3 43.8/ 50.5 65.8/ 74.3 70/ 80 62/ 69 111/ 111

— —/— —/— 23.4/ 23.4 30/ 30 23/ 23 136/ 136

002 4.9/ 5.8 13.6/ 15.6 24.2/ 26.8 30/ 30 23/ 25 136/ 136

003 6.5/ 8 18.1/ 20.9 29.9/ 33.4 35/ 35 28/ 31 136/ 136

005 12/ 14.7 33.4/ 38.5 48.9/ 55.4 50/ 60 45/ 51 136/ 136

004+004 16/ 19.3 43.8/ 50.5 62.0/ 70.4 70/ 80 57/ 65 136/ 136

— —/— —/— 29.4/ 29.4 35/ 35 29/ 29 140/ 140

002 4.9/ 5.8 13.6/ 15.6 29.4/ 31.8 35/ 35 29/ 30 140/ 140

003 6.5/ 8 18.1/ 20.9 34.9/ 38.4 40/ 40 33/ 36 140/ 140

005 12/ 14.7 33.4/ 38.5 53.9/ 60.4 60/ 70 51/ 56 140/ 140

004+004 16/ 19.3 43.8/ 50.5 67.0/ 75.4 70/ 80 63/ 70 140/ 140

— — — 10.6 20 10 53

006 5.5 7.2 11.8 20 11 54

— — — 13.3 20 13 55

008 10.6 13.8 20.0 25 18 54

009 12.9 16.8 23.8 25 22 54

006 5.5 7.2 15.1 20 13 56

008+008 21.1 27.7 37.3 40 34 54

— — — 11.0 20 11 67

008 10.6 13.8 22.7 25 21 56

009 12.9 16.8 26.5 30 24 56

006 5.5 7.2 12.3 20 11 68

008+008 21.1 27.7 40.0 45 37 56

— — — 13.7 20 13 70

008 10.6 13.8 20.5 25 19 68

009 12.9 16.8 24.3 25 22 68

006 5.5 7.2 15.6 20 14 70

008 10.6 13.8 23.2 25 21 70

008+008 21.1 27.7 37.8 40 35 68

009 12.9 16.8 27.0 30 25 70

008+008 21.1 27.7 40.5 45 37 70

Table 4 — Electrical Data--551B (cont)

Min Max QTY RLA LRA QTY FLA

VOLTAGE RANGE COMPRESSOR (EACH) OUTDOOR FAN ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE

2 3 0 --- 1 --- 6 0 STD

208

ES 197 254 1 23.7 126 1 0.7 4.9

NO 187 254 1 13.5 93 1 0.7 4.9

YES 187 254 1 13.5 93 1 0.7 4.9

STD

2 3 0 --- 3 --- 6 0

208

NO 187 254 1 13.5 93 1 0.7 5.8

HS

048

YES 187 254 1 13.5 93 1 0.7 5.8

(4 ton)

NO 414 508 1 6.4 46.5 1 0.4 2.2

YES 414 508 1 6.4 46.5 1 0.4 2.2

STD

NO 414 508 1 6.4 46.5 1 0.4 2.6

HS

4 6 0 --- 3 --- 6 0

NO 518 632 1 6.4 40 1 0.4 1.9 — — — 10.3 15 10 45

NO 518 632 1 6.4 40 1 0.4 2.0 — — — 10.4 15 10 52

STD

NO 518 632 1 6.4 4 1 0.4 2.6 — — — 10.4 15 10 57

YES 518 632 1 6.4 40 1 0.4 1.9 — — — 12.5 15 12 47

YES 518 632 1 6.4 40 1 0.4 2.0 — — — 12.6 15 12 53

YES 518 632 1 6.4 4 1 0.4 2.6 — — — 12.6 15 12 59

Perfe ct

Humidity

5 7 5 --- 3 --- 6 0 HS

YES 414 508 1 6.4 46.5 1 0.4 2.6

CONV

OUTLET

IFM TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

NO 197 254 1 23.7 126 1 0.7 4.9

19

NO18725

4

12881691158

8

208/230

160

STD

/

Y

E

S187254

12881691158

8

Y

NO18725

4

11731231155

8

STD

Y

E

S187254

11731231155

8

Y

208/230

360

/

NO18725

4

11731231157

5

H

S

Y

E

S187254

11731231157

5

060

Y

(

5ton)

NO41450

8

196210826

STD

Y

E

S414508

196210826

Y

460

360

NO41450

8

196210834

H

S

Y

E

S414508

196210834

Y

STD

575

360HS

Perfect

551B,C

Actual kW{ FLA MCA MOCP** FLA LRA

— —/— —/— 46.3/ 46.3 60/ 60 45/ 45 216/ 216

002 4.9/ 5.8 23.5/ 27.1 46.3/ 46.3 60/ 60 45/ 45 216/ 216

B00

--- --- A 0 0 o r

CRHEATER

IFM

FLA

003 6.5/ 8.0 31.4/ 36.3 50.3/ 56.3 60/ 60 46/ 52 216/ 216

002+002 8.7/ 11.6 46.9/ 54.2 69.7/ 78.7 70/ 80 64/ 72 216/ 216

003+003 13.0/ 16.0 62.8/ 72.5 49.5/ 101.6 90/ 110 82/ 93 216/ 216

004+004 15.8/ 19.3 75.8/ 87.5 105.8/ 120.4 110/ 125 97/ 111 216/ 216

— —/— —/— 52.3/ 52.3 60/ 60 50/ 50 221/ 221

002 4.9/ 5.8 23.5/ 27.1 52.3/ 52.3 60/ 60 50/ 50 221/ 221

003 6.5/ 8.0 31.4/ 36.3 55.3/ 61.3 60/ 70 52/ 57 221/ 221

002+002 8.7/ 11.6 46.9/ 54.2 74.7/ 83.7 80/ 90 70/ 78 221/ 221

003+003 13.0/ 16.0 62.8/ 72.5 94.5/ 106.6 100/ 110 88/ 99 221/ 221

004+004 15.8/ 19.3 75.8/ 87.5 110.8/ 125.4 125/ 150 103/ 116 221/ 221

— —/— —/— 28.9/ 28.9 35/ 35 28/ 28 168/ 168

002 4.9/ 5.8 13.6/ 15.6 28.9/ 28.9 35/ 35 28/ 28 168/ 168

004 7.9/ 9.6 21.9/ 25.3 34.6/ 38.8 35/ 35 32/ 36 168/ 168

005 12.0/ 14.7 33.4/ 38.5 48.9/ 55.4 50/ 50 45/ 51 168/ 168

004+004 15.8/ 19.3 43.8/ 50.5 62/ 70.4 70/ 70 57/ 65 168/ 168

004+005 19.9/ 24.3 55.2/ 63.8 76.3/ 86.9 80/ 80 70/ 80 168/ 168

— —/— —/— 34.9/ 34.9 40/ 40 34/ 34 173/ 173

002 4.9/ 5.8 13.6/ 15.6 34.9/ 34.9 40/ 40 34/ 34 173/ 173

004 7.9/ 9.6 21.9/ 25.3 39.6/ 43.8 40/ 40 37/ 41 173/ 173

005 12.0/ 14.7 33.4/ 38.5 53.9/ 60.4 60/ 70 51/ 56 173/ 173

004+004 15.8/ 19.3 43.8/ 50.5 67/ 75.4 70/ 80 63/ 70 173/ 173

004+005 19.9/ 24.3 55.2/ 63.8 81.3/ 91.9 90/ 100 76/ 86 173/ 173

— —/— —/— 30.6/ 30.6 35/ 35 30/ 30 187/ 187

002 4.9/ 5.8 13.6/ 15.6 30.6/ 30.6 35/ 35 30/ 30 187/ 187

004 7.9/ 9.6 21.9/ 25.3 36.7/ 40.9 40/ 45 34/ 38 187/ 187

005 12.0/ 14.7 33.4/ 38.5 51.1/ 57.5 60/ 60 47/ 53 187/ 187

004+004 15.8/ 19.3 43.8/ 50.5 64.1/ 72.5 70/ 80 59/ 67 187/ 187

004+005 19.9/ 24.3 55.2/ 63.8 78.4/ 89.1 80/ 90 72/ 82 187/ 187

— —/— —/— 36.6/ 36.6 40/ 40 36/ 36 192/ 192

002 4.9/ 5.8 13.6/ 15.6 36.6/ 36.6 40/ 40 36/ 36 192/ 192

004 7.9/ 9.6 21.9/ 25.3 41.7/ 45.9 45/ 50 39/ 43 192/ 192

005 12.0/ 14.7 33.4/ 38.5 56.6/ 62.5 60/ 70 53/ 58 192/ 192

004+004 15.8/ 19.3 43.8/ 50.5 69.1/ 77.5 70/ 80 65/ 72 192/ 192

004+005 19.9/ 24.3 55.2/ 63.8 83.4/ 94.1 90/ 100 78/ 87 192/ 192

— — — 14.7 20 14 84

006 5.5 7.2 14.7 20 10 84

— — — 17.4 20 17 86

008 10.6 13.8 20.5 25 19 84

009 12.9 16.8 24.3 25 22 84

006 5.5 7.2 17.4 20 17 87

008+008 21.1 27.7 37.8 40 35 84

008+009 23.4 30.1 40.8 45 38 84

— — — 15.5 20 15 93

008 10.6 13.8 23.2 25 21 87

009 12.9 16.8 27.0 30 25 87

006 5.5 7.2 15.5 20 15 94

008+008 21.1 27.7 40.5 45 37 87

008+009 23.4 30.1 43.5 45 40 87

— — — 18.2 20 18 96

008 10.6 13.8 21.5 25 20 94

009 12.9 16.8 25.3 30 23 94

006 5.5 7.2 18.2 20 18 96

008 10.6 13.8 24.2 25 22 96

008+008 21.1 27.7 38.8 40 36 94

009 12.9 16.8 28.0 30 26 96

008+009 23.4 30.1 41.8 45 38 94

008+008 21.1 27.7 41.5 45 38 96

008+009 23.4 30.1 44.5 45 41 96

Table 4 — Electrical Data--551B (cont)

Min Max QTY RLA LRA QTY FLA

VOLTAGE RANGE COMPRESSOR (EACH) OUTDOOR FAN ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE

CONV

OUTLET

IFM TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

2 3 0 --- 1 --- 6 0 STD

208

ES 187 254 1 28.8 169 1 1.5 8.8

NO 187 254 1 17.3 123 1 1.5 5.8

NO 187 254 1 28.8 169 1 1.5 8.8

STD

ES 187 254 1 17.3 123 1 1.5 5.8

NO 187 254 1 17.3 123 1 1.5 7.5

2 3 0 --- 3 --- 6 0

208

HS

060

ES 187 254 1 17.3 123 1 1.5 7.5

(5 ton)

NO 414 508 1 9 62 1 0.8 2.6

STD

ES 414 508 1 9 62 1 0.8 2.6

NO 414 508 1 9 62 1 0.8 3.4

4 6 0 --- 3 --- 6 0

HS

ES 414 508 1 9 62 1 0.8 3.4

NO 518 632 1 7.1 50 1 0.6 2.0 — — — 11.5 15 11 63

NO 518 632 1 7.1 50 1 0.6 2.8 — — — 12.3 15 12 72

YES 518 632 1 7.1 50 1 0.6 2.0 — — — 13.6 15 13 64

YES 518 632 1 7.1 50 1 0.6 2.8 — — — 14.4 15 14 73

YES 518 632 1 7.1 50 1 0.6 3.4 — — — 14.4 20 14 77

STD

Perfe ct NO 518 632 1 7.1 50 1 0.6 3.4 — — — 12.2 15 12 76

Humidity

5 7 5 --- 3 --- 6 0 HS

20

UNI

T

IFM

FLA LRA

NO187

254

120

5

1561145

8

STD

Y

E

S

187

254

120

5

1561145

8

Y

208/230

3

6

0

/

NO187

254

120

5

1561147

5

H

S

Y

E

S

187

254

120

5

1561147

5

Y

NO414

50819

6

7510626

072

(

6

t

o

n

)

STD

Y

E

S

414

50819

6

7510626

Y

460

3

6

0

NO414

50819

6

7510634

H

S

Y

E

S

414

50819

6

7510634

Y

STD

575

3

60H

S

P

erf

e

c

t

MOCP**

551B,C

FLA MCA

kW†

Actual

ELECTRI C HEAT POWER SUPPLY * DISCONNECT SIZE

— —/— —/— 32.8/ 32.8 40/ 40 32/ 32 200/ 200

002 4.9/ 5.8 13.6/ 15.6 32.8/ 32.8 40/ 40 32/ 32 200/ 200

004 7.9/ 9.6 21.9/ 25.3 34.6/ 38.8 40/ 40 32/ 36 200/ 200

B00

CRHEATER

--- --- --- A 0 0 o r

IFM

FLA

005 12.0/ 14.7 33.4/ 38.5 48.9/ 55.4 50/ 50 45/ 51 200/ 200

004+004 15.8/ 19.3 43.8/ 50.5 62.0/ 70.4 70/ 80 57/ 65 200/ 200

004+005 19.9/ 24.3 55.2/ 63.8 76.3/ 86.9 80/ 90 70/ 80 200/ 200

— —/— —/— 38.8/ 38.8 45/ 45 37/ 37 205/ 205

002 4.9/ 5.8 13.6/ 15.6 38.8/ 38.8 45/ 45 37/ 37 205/ 205

004 7.9/ 9.6 21.9/ 25.3 39.6/ 43.8 45/ 45 37/ 41 205/ 205

005 12.0/ 14.7 33.4/ 38.5 53.9/ 60.4 60/ 70 51/ 56 205/ 205

004+004 15.8/ 19.3 43.8/ 50.5 67.0/ 75.4 70/ 80 63/ 70 205/ 205

004+005 19.9/ 24.3 55.2/ 63.8 76.3/ 86.9 90/ 100 76/ 86 205/ 205

— —/— —/— 34.5/ 34.5 40/ 40 34/ 34 219/ 219

002 4.9/ 5.8 13.6/ 15.6 34.5/ 34.5 40/ 40 34/ 34 219/ 219

004 7.9/ 9.6 21.9/ 25.3 36.7/ 40.9 40/ 45 34/ 38 219/ 219

005 12.0/ 14.7 33.4/ 38.5 51.1/ 57.5 60/ 60 47/ 53 219/ 219

004+004 15.8/ 19.3 43.8/ 50.5 64.1/ 72.5 70/ 80 59/ 67 219/ 219

004+005 19.9/ 24.3 55.2/ 63.8 78.4/ 89.1 80/ 90 72/ 82 219/ 219

— —/— —/— 40.5/ 40.5 45/ 45 39/ 39 224/ 224

002 4.9/ 5.8 13.6/ 15.6 40.5/ 40.5 45/ 45 39/ 39 224/ 224

004 7.9/ 9.6 21.9/ 25.3 41.7/ 45.9 45/ 50 39/ 43 224/ 224

005 12.0/ 14.7 33.4/ 38.5 56.1/ 62.5 60/ 70 53/ 58 224/ 224

004+004 15.8/ 19.3 43.8/ 50.5 69.1/ 77.5 70/ 80 65/ 72 224/ 224

004+005 19.9/ 24.3 55.2/ 63.8 83.4/ 94.1 90/ 100 78/ 87 224/ 224

— — — 15.2 20 15 97

006 5.5 7.2 15.2 20 15 97

008 10.6 13.8 20.5 25 19 97

— — — 17.9 20 17 99

009 12.9 16.8 24.3 25 22 97

006 5.5 7.2 17.9 20 17 99

008+008 21.1 27.7 37.8 40 35 97

008 10.6 13.8 23.2 25 21 99

008+009 23.4 30.7 41.6 45 38 97

— — — 16.0 20 16 106

009 12.9 16.8 27.0 30 25 99

006 5.5 7.2 16.0 20 16 107

008+008 21.1 27.7 40.5 45 37 99

008 10.6 13.8 21.5 25 20 107

008+009 23.4 30.7 44.3 45 41 99

009 12.9 16.8 25.3 30 23 107

008+008 21.1 27.7 38.8 40 36 107

008+009 23.4 30.7 42.6 45 39 107

— — — 18.7 25 18 108

006 5.5 7.2 18.7 25 18 109

008 10.6 13.8 24.2 25 22 109

009 12.9 16.8 28.0 30 26 109

008+008 21.1 27.7 41.5 45 38 109

008+009 23.4 30.7 45.3 50 42 109

Table 4 — Electrical Data--551B (cont)

COMPRESSOR (each) OUTDOOR FAN

RANGE

VOLTAGE

Min Max QTY RLA LRA QTY FLA

CONV

OUTLET

NO 187 254 1 20.5 156 1 1.4 5.8

ES 187 254 1 20.5 156 1 1.4 5.8

NO 187 254 1 20.5 156 1 1.4 7.5

ES 187 254 1 20.5 156 1 1.4 7.5

NO 414 508 1 9.6 75 1 0.6 2.6

ES 414 508 1 9.6 75 1 0.6 2.6

NO 414 508 1 9.6 75 1 0.6 3.4

ES 414 508 1 9.6 75 1 0.6 3.4

NO 518 632 1 7.7 56 1 0.6 2.0 — — — 11.5 15 11 63

NO 518 632 1 7.7 56 1 0.6 2.8 — — — 12.3 15 12 72

NO 518 632 1 7.7 56 1 0.6 3.4 — — — 12.2 15 12 76

YES 518 632 1 7.7 56 1 0.6 2.0 — — — 13.6 15 13 64

YES 518 632 1 7.7 56 1 0.6 2.8 — — — 14.4 20 14 73

YES 518 632 1 7.7 56 1 0.6 3.4 — — — 14.4 20 14 77

IFM

TYPE

NOMINAL

V --- P H --- H z

SIZE

UNIT

STD

2 3 0 --- 3 --- 6 0

208

HS

072

STD

4 6 0 --- 3 --- 6 0

(6 ton)

HS

STD

5 7 5 --- 3 --- 6 0 HS

Perfe ct

Humidity

21

551B,C

Step 6 —Adjust Factory-Installed Options

Perfect Humidity Adaptive Dehumidification
System

Perfect Humidity system operation can be controlled by field
installation of a Bryant--approved humidistat. (See Fig. 13.)

NOTE: A light commercial Thermidistat device (Fig. 14) can
be used instead of the humidistat if desired. The Thermidistat
device includes a thermostat and a humidistat. The humidistat is
normally used in applications where a temperature sensor is
already provided.

% RELATIVE HUMIDITY

C06358

Fig. 13 --- Accessory Field--Installed Humidistat

C06359

Fig. 14 --- Light Commercial Thermidistat Device

To install the humidistat:

1. Route humidistat cable through hole provided in unit
control box.

2. Some models may be equipped with a raceway built into
the corner post on the left side of control box (See Fig.

12.) This raceway provides the required clearance between
high-- voltage and low voltage wiring. For models without
a raceway, ensure to provide the NEC required clearance
between high-- voltage and low--voltage wiring.

3. Use a wire nut to connect humidistat cable into low­voltage wiring as shown in Fig. 15.

To install Thermidistat device:

1. Route Thermidistat cable through hole provided in unit
control box.

2. Some models may be equipped with a raceway built into
the corner post on the left side of control box (See Fig.

12.) This raceway provides the required clearance between
high-- voltage and low voltage wiring. For models without
a raceway, ensure to provide the NEC required clearance
between high-- voltage and low--voltage wiring.

3. A field-supplied relay must be installed between the
thermidistat and the Perfect Humidity circuit
(recommended relay: HN61KK324). (See Fig. 16.) 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 low-pressure switch. Refer
to the installation instructions included with the Bryant
Light Commercial Thermidistat device for more
information.

Disconnect

Switch

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

Manual Outdoor

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 and save outdoor air opening panel and screws.
(See Fig. 17.)

3. Remove evaporator coil access panel. Separate hood and
screen from basepan by removing the 4 screws securing
them. Save all screws.

4. Replace evaporator coil access panel.

5. Place hood on front of outdoor air opening panel. See
Fig. 18 for hood details. Secure top of hood with the
4screwsremovedinStep3.(SeeFig.19.)

6. Remove and save 6 screws (3 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. 18 and 19.) Secure
hood with 6 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. 17.) Slide blade
vertically until it is in the appropriate position determined
by Fig. 20. Tighten screws.

9. Remove and save screws currently on sides of hood.
Insert screen. Secure screen to hood using the screws. (See
Fig. 19.)

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.

22

CB — Circuit Breaker
CR — Cooling Relay
DHR — Dehumidify Relay
DSV — Discharge Solenoid Valve
HR — Heater Relay
LPS — Low Pressure Switch
LSV — Liquid Solenoid Valve
LT LO — Low Temperature Lockout

Field Splice

Fig. 15 --- Typical Perfect Humidityt Adaptive Dehumidification System

LEGEND

Terminal (Unmarked)

Splice

Factory Wiring

Field Control Wiring

Field Power Wiring

Humidistat Wiring (208/230--V Unit Shown)

C06128

551B,C

LCT

R

C
Y1
Y2

G
W1
W2

DEHUM

OC

TSTAT WIRES

LEGEND

CB — Circuit Breaker
LCT — Light Commercial Thermidistat™ Device
LLSV — Liquid Line Solenoid Valve
LT LO — Low Temperature Lockout

Fig. 16 --- Typical Rooftop Unit with Perfect Humidity

Adaptive Dehumidification System with Thermidistat Device

OUTDOOR
AIR OPENING
PANEL

3 SCREWS
(SIDE)

R1

R1

ROOF TOP UNIT

R

C

Y1

Y2

G
W1
W2

CB

3.2 AMPS

PINK

PINK

LTL O

PERFECT HUMIDITY SYSTEM

RED

PINK

24 V

FROM
PERFECT HUMIDITY SYSTEM
LLSV

C06360

Fig. 17 --- Damper Panel with Manual Outdoor-- Air

Damper Installed

C06130

C06013

Fig. 18 --- Outdoor--Air Hood Details

23

A

551B,C

Fig. 19 --- Outdoor--Air Damper With Hood Attached

Fig. 20 --- Outdoor-- Air Damper Position Setting

ECONOMI$ER IV
CONTROLLER

WIRING
HARNESS

CTUATOR

OUTSIDE AIR
TEMPERATURE SENSOR

LOW AMBIENT
SENSOR

C06131

C06132

Optional EconoMi$er

IV

See Fig. 21 for EconoMi$er IV component locations.
NOTE: These instructions are for installing the optional

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

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. 22.)

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. 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. 23.)

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. 24.)

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. 25.)

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

6. Insert the hood divider between the hood sides. (See
Fig. 25 and 26.) 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 position past the
open filter clips. Close the filter clips to lock the filter into
place. (See Fig. 26.)

8. Caulk the ends of the joint between the unit top panel and
the hood top. (See Fig. 24.)

9. Replace the filter access panel.

10. Install all EconoMi$er IV accessories. EconoMi$er IV
wiring is shown in Fig. 27.

Barometric flow capacity is shown in Fig. 28. Outdoor air
leakage is shown in Fig. 29. Return air pressure drop is shown in
Fig. 30.

FILTER ACCESS PANEL

C06021

Fig. 21 --- EconoMi$er IV Component Locations

COMPRESSOR
ACCESS PANEL

OUTDOOR-AIR OPENING AND
INDOOR COIL ACCESS PANEL

C06023

Fig. 22 --- Typical Access Panel Locations

24

x

R

o

B

d

o

o

H

HOOD BOX
BRACKET

Fig. 23 --- Hood Box Removal

SIDE
PANEL

TOP
SIDE
PANEL

INDOOR
COIL
ACCESS
PANEL

INDOOR
COIL
ACCESS
PANEL

CAULK
HERE

Fig. 24 --- Indoor Coil Access Panel Relocation

C06024

C06025

(See Fig. 21.) The operating range of temperature measurement is
40_ to 100_F.

Supply Air Temperature (SAT) Sensor

The supply air temperature sensor is a 3k ohm thermistor located
at the inlet of the indoor fan. (See Fig. 32.) This sensor is factory
installed. The operating range of temperature measurement is 0
to 158_F. See Table 5 for sensor temperature/resistance values.

Table 5—Supply Air Sensor Temperature/

Resistance Values

TEMPERATURE (F) RESISTANCE (ohms)

–58
–40
–22

–4
14
32
50
68
77

86
104
122
140
158
176
185
194
212
230
248
257
266
284
302

17 1/4”

200,250
100,680

53,010
29,091
16,590

9,795
5,970
3,747
3,000
2,416
1,597
1,080

746
525
376
321
274
203
153
116
102

89
70
55

551B,C

TOP
PANEL

INDOOR COIL
ACCESS PANEL

LEFT
HOOD
SIDE

B

19 1/16”

HOOD DIVIDER

SCREW

33 3/8”

C06026

Fig. 25 --- Outdoor-- Air Hood Construction

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.

DIVIDER

OUTSIDE
AIR

HOOD

CLEANABLE

BAROMETRIC
RELIEF

ALUMINUM
FILTER

FILTER

FILTE
CLIP

Fig. 26 --- Filter Installation

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 air stream which is used to
lockout the compressors below a 42_F ambient temperature. (See
Fig. 21.)

25

C06027

EconoMi$er IV Control

APPLICATION

Modes

Determine the EconoMi$er IV control mode before set up of the
control. Some modes of operation may require different
sensors. (See Table 6.) The EconoMi$er IV is supplied from the
factory with a supply--air temperature sensor and an outdoor-- air
temperature sensor. This allows for operation o f 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.

Table6—EconoMi$erIVSensorUsage

APPLICATION

Outdoor Air

Dry Bulb

Differential

Dry Bulb

Single Enthalpy HH57AC078

551B,C

Differential

Enthalpy

CO2for DCV

Control using a

Wall-Mounted

Sensor

CO

2

CO2for DCV

Control using a

Duct-Mounted

Sensor

CO

2

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

applications.
†† CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2

and 33ZCASPCO2 accessories.

ECONOMI$ER IV WITH OUTDOOR AIR

33ZCSENCO2†

33ZCASPCO2**

DRY BULB SENSOR

Accessories Required

None. The outdoor air dry bulb sensor

is factory installed.

CRTEMPSN002A00*

HH57AC078

and

CRENTDIF004A00*

33ZCSENCO2

O

and

sensor.

2

CRCBDIOX005A00††

R

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. 33.) The scale on the potentiometer is A, B,
C, and D. See Fig. 34 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. 35.)
Wiring is provided in the EconoMi$er IV wiring harness. (See
Fig. 27.)

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 setpoint potentiometer fully
clockwise to the D setting. (See Fig. 33.)

FOR OCCUPANCY CONTROL
REPLACE JUMPER WITH
FIELD-SUPPLIED TIME CLOCK

8

7

DCV— Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature
POT— Potentiometer
RAT— Return-Air Temperature

LEGEND

Potentiometer Defaults Settings:
Power Exhaust Middle
Minimum Pos. Fully Closed
DCV Max. Middle
DCV Set Middle
Enthalpy 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.

C06028

Fig. 27 --- EconoMi$er IV Wiring

26

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. 21.) 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$er IV controller. The set
points are A, B, C, and D. (See Fig. 36.) The factory-installed
620-ohm jumper must be in place across terminals SR and SR+
on the EconoMi$er IV controller. (See Fig. 21 and 37.)

Differential Enthalphy 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.

2500

6000

5000

4000

3000

2000

1000

0

0.05 0.10 0.15 0.20 0.25 0.30 0.35

FLOW IN CUBIC FEET PER MINUTE (cfm)

STATIC PRESSURE (in. wg)

Fig. 30 --- Return--Air Pressure Drop

HH57AC078 ENTHALPY
SENSOR

C7400A1004

+

C06032

551B,C

2000

1500

1000

500

FLOW IN CUBIC FEET PER MINUTE (cfm)

0

0.05

STATIC PRESSURE (in. wg)

0.15

Fig. 28 --- Barometric 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

FLOW IN CUBIC FEET PER MINUTE (cfm)

STATIC PRESSURE (in. wg)

Fig. 29 --- Outdoor--Air Damper Leakage

0.25

C06030

C06031

MOUNTING PLATE

Fig. 31 --- Enthalpy Sensor and Mounting Plate

SUPPLY AIR
TEMPERATURE
SENSOR
MOUNTING
LOCATION

SUPPLY AIR
TEMPERATURE
SENSOR

Fig. 32 --- Supply Air Sensor Location

C06361

C06033

27

When demand ventilation control is not being used, the minimum

(

)

+(T

R

x

)

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:

551B,C

C06034

Fig. 33 --- EconoMi$er IV Controller Potentiometer

and LED Locations

Replace the standard outside air dry bulb temperature sensor with
the accessory enthalpy sensor in the same mounting location.
(See Fig. 21.) Mount the return air enthalpy sensor in the return
air duct. (See Fig. 35.) Wiring is provided in the EconoMi$er IV
wiring harness. (See Fig. 27.) The outdoor enthalpy changeover
set point is set with the outdoor enthalpy set point potentiometer
on the EconoMi$er IV controller. When using this mode of
changeover control, turn the enthalpy setpoint potentiometer fully
clockwise to the D setting.

Indoor Air Quality (IAQ) Sensor Input

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

Mount the accessory IAQ sensor according to manufacturer
specifications. The IAQ sensor is 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. 38.)

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.

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. 33.) 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. 33.) 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.

measured in the space or return air

2

OA

T

Ox

100

TO= Outdoor-Air Temperature
OA = Percent of Outdoor Air

= Return-Ai r Temperature

T

R

RA = Percent of Return Air

= Mixed-Air Temperature

T

M

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. 27 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 supply air temperature matches the
calculated value.

6. Reconnect the mixed 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. 37.)

Damper Movement

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

1

/2minutes.

takes 2

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.

RA

100

=T

M

28

19

LED ON

mA

18

17

16

15

14

13

12

11

10

9

40

45

LED OFF

50

D

LED ON

C

LED OFF

60

55

65

DEGREES FAHRENHEIT

70

Fig. 34 --- Outside Air Temperature

Changeover Set Points

CONTROL

2

1

CURVE

A
B
C
D

4

1

CONTROL POINT

8

1

6

1

APPROX.

AT 50% RH

0

2

LED ON

B

LED OFF

75

deg. F (deg. C)

73 (23)
70 (21)
67 (19)
63 (17)

2

2

35

(2)

4

2

LED ON

A

LED OFF

100

90

95

85

80

8

3

6

3

4

3

32

30

28

ENTHALPY BTU PER POUND DRY AIR

26

60

(16)

A

55

(13)

B

50

C

(10)

45

D

(7)
40
(4)

C06035

40

65

(18)

42

(21)

1

ECONOMI$ER IV
CONTROLLER

ECONOMI$ER IV

GROMMET

RETURN AIR
SENSOR

RETURN DUCT
(FIELD-PROVIDED)

C06036

Fig. 35 --- Return Air Temperature or Enthalpy

Sensor Mounting Location

85

(29)90(32)95(35)

46

4

4

80

(27)

75

(24)

70

0

0

0

9

80

70

0

6

50

0

4

100

105
(41)

110
(43)

(38)

RELATIVE HUMIDITY (%)

30

20

0

1

551B,C

35

40

45

50

55

60

(2)

(4)

(7)

(10)

(13)

(16)

(18)

65

APPROXIMATE DRY BULB TEMPERATURE--degrees F (degrees C)

Fig. 36 --- Enthalpy Changeover Set Points

Occupancy Control

The factory default configuration for the EconoMi$er IV control
is occupied mode. Occupied mode is provided by the black
jumper from terminal TR to terminal N. When unoccupied mode
is desired, install a field-supplied timeclock function in place of
the jumper between TR and N. (See Fig. 27.) When the timeclock
contacts are closed, the EconoMi$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.

(21)

A

B

C

D

105

70

75

80

(24)

85

(27)

(29)90(32)95(35)

100
(38)

(41)

110

(43)

HIGH LIMIT
CURVE

C06037

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.

29

A proportional anticipatory strategy should be taken with the

(

)

+(T

R

x

)

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 proportional-anticipatory strategy will cause the
fresh air supplied to increase as the room CO
even though the CO
the CO

level reaches the set point, the damper will be at

2

set point has not been reached. By the time

2

level increases

2

maximum ventilation and should maintain the set point.
In order to have the CO

sensor control the economizer damper in

2

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.

2V 10V

EXH

2V 10V

DCV

2V 10V

Free
Cool

B

A

Open

EXH

DCV

DCV

C

Set

Min
Pos

Max

Set

D

N1

N

P1

P

T1

T

AQ1

AQ

SO+

SO

SR+

SR

Fig. 37 --- EconoMi$er IV Control

TR1

TR

24

24 Vac

Vac

COM

HOT

+

12

3

EF1

EF

_

5

4

C06038

551B,C

T

Ox

OA
100

RA
100

=T

M

TO= Outdoor-Air Temperature
OA = Percent of Outdoor Air

= Return-Air Temperat ure

T

R

RA = Percent of Return Air

= Mixed-Air Temperature

T

M

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. 38 to
determine the maximum setting of the CO

sensor. For example,

2

a 1100 ppm set point relates to a 15 cfm per person design. Use
the 1100 ppm curve on Fig. 38 to find the point when the CO
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

sensor should be 1800 ppm. The

2

EconoMi$er IV controller will output the 6.7 volts from the CO
sensor to the actuator when the CO2concentration in the space is
at 1100 ppm. The DCV set point may be left at 2 volts since the

sensor voltage will be ignored by the EconoMi$er IV

CO

2

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.

Sensor Configuration

CO

2

The CO

sensor has preset standard voltage settings that can be

2

selected anytime after the sensor is powered up. (See Table 7.)

CO SENSOR MAX RANGE SETTING

6000

5000

4000

3000

2000

1000

RANGE CONFIGURATION (ppm)

0

2

800 ppm
900 ppm
1000 ppm
1100 ppm

2345678

DAMPER VOLTAGE FOR MAX VENTILATION RATE

C06039

Fig. 38 --- CO2Sensor Maximum Range Setting

2

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

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

3. Use the Up/Down button to select the preset number. (See
Tab le 7 . )

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume normal operation.

The custom settings of the CO

sensor can be changed anytime

2

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.

30

Dehumidification of Fresh Air with DCV Control

BuildingControlSystem

Information from ASHRAE indicates that the largest humidity
load on any zone is the fresh air introduced. For some
applications, a device such as an energy recovery unit can be
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.

Step 7 —Adjust Evaporator--Fan Speed

Adjust evaporator-fan speed to meet jobsite conditions.
Tables 8 and 9 show fan rpm at motor pulley settings for the

551C 024--060 and 551B 036 --072 units. Tables 10 and 13 show
maximum amp draw of belt-drive motor. Table 12 shows sound
data. Refer to Tables 14-33 for performance data. See Table 34
for accessory static pressure drop. See Fig. 39 for the Perfect
Humidity system static pressure drops.

For units with electric heating, required minimum cfm is 900 for
551B/C 036; 1200 for 551B/C 048; 1500 for 551B/C 060 and
1800 for 551B 072 and 600 for 551C 024.

Belt Drive

Fan motor pulleys are factory set for speed shown in Table 1.
Check pulley alignment and belt tension prior to start-up.

To change fan speed:

Motors

1. Shut off the unit power supply and tag disconnect.

2. Loosen the belt by loosening the fan motor mounting nuts.
(See Fig. 40.)

3. Loosen movable pulley flange setscrew (See Fig. 41).

4. Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed.
Increasing fan speed 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.)

6. Adjust belt tension and align fan and motor pulleys per
guidance below.

NOTE: Once the required flange position is determined for the
correct blower rpm, it is recommended (but not required) that the
variable pitch pulley be replaced with a corresponding size fixed
sheave pulley.

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.

To adjust belt tension:

1. Loosen fan motor mounting nuts.

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

1

/2-in.deflectionwith7to10lbof

force).

3. Tighten motor mounting nuts.

4. Adjust bolt and tighten nut to secure motor in fixed
position.

551B,C

SETTING EQUIPMENT OUTPUT

1

Interface w/Standard

2

Building Control System

3

4

5

Economizer

6

7

Health & Safety Proportional —

8

Parking/Air Int akes/

9

Loading Docks

LEGEND
ppm — Parts Per Million

Proportional Any

Proportional Any

Exponential Any

Proportional 15

Proportional 20

Exponential 15

Exponential 20

Proportional —

Table 7—CO

VENTILATION

RATE

(cfm/Person)

Sensor Standard Settings

2

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

CONTROL RANGE

CO

2

(ppm)

0-2000 1000 50

0-2000 1000 50

0-2000 1100 50

0-1100 1100 50

0- 900 900 50

0-1100 1100 50

0- 900 900 50

0-9999 5000 500

0-2000 700 50

OPTIONAL

RELAY SETPOINT

(ppm)

RELAY

HYSTERESIS

(ppm)

31

DELTA P IN. WG

551

B

UNI

T

0.35

0.3

0.25

0.2

0.15

551B,C

0.1

0.05

0

0

1000

Fig. 39 --- Perfect Humidityt Adaptive Dehumidification System Static Pressure Drop (in. wg)

Fig. 40 --- Belt Drive Motor Mounting

2000

3000

C06134

4000

5000

6000

Fig. 41 --- Evaporator--Fan Pulley Adjustment

4&5ton

6 ton

3 ton

C06133

C06041

Table 8—551B, 551C Fan Rpm at Motor Pulley Setting With Standard Motor*

UNIT

551C

024
036
048
060
072

*Approximate fan rpm shown (standard motor/drive).

0

936 906 876 846 816 786 756 726 696 666 639 — —
1044 1008 971 935 898 862 826 789 753 716 680 — —
1185 1144 1102 1061 1019 978 936 895 853 812 770 — —
1460 1425 1389 1354 1318 1283 1248 1212 1177 1141 1106 1070 1035
1585 1538 1492 1445 1399 1352 1305 1259 1212 1166 1119 — —

1

/

2

Table 9—551B, 551C Fan Rpm at Motor Pulley Setting With High-Static Motor*

036
048
060
072

*Approximate fan rpm shown (high-static motor/drive).

1455 1423 1392 1360 1328 1297 1265 1233 1202 1170 1138 1107 1075
1455 1423 1392 1360 1328 1297 1265 1233 1202 1170 1138 1107 1075
1685 1589 1557 1525 1493 1460 1428 1396 1364 1332 1300 — —
1685 1589 1557 1525 1493 1460 1428 1396 1364 1332 1300 — —

0

1

/

2

1 11/

1 11/

2

MOTOR PULLEY TURNS OPEN

2 21/

2

2

MOTOR PULLEY TURNS OPEN

2 21/

2

3 31/

32

3 31/

2

4 41/

2

4 41/

5 51/

2

2

5 51/

2

6

2

6

Table 10—Evaporator-Fan Motor Data — Standard Motor

Three

1.20100

0

Three

1.20100

0

Three

2.40212

0

072

Three

2.40212

0

036

Three

2.40212

0

048

Three

2.40212

0

060

Three

2.90261

5

072

Three

2.90261

5

COMPONENT

UNIT
551B
551C

024

UNIT

PHASE

MAXIMUM

CONTINUOUS BHP*

MAXIMUM

OPERATING WATTS*

UNIT VOLTAGE

MAXIMUM

AMP DRAW

ALL 0.58 580 2.0 75.0

Single 1.20 1000 208/230 4.9

036

Three 1.20 1000

208/230 4.9

460 2.2
575 2.2

Single 1.20 1000 208/230 4.9

048

Three 1.20 1000

208/230 4.9

460 2.2
575 2.2

Single 1.30 1455 208/230 7.0

060

Three 2.40 2120

208/230 6.7

460 3.0
575 3.0

208/230 6.7

072

Three 2.40 2120

460 3.0
575 3.0

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 the

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.

Table 11—Evaporator-Fan Motor Data — High-Static Motors

UNIT
551B
551C

036

048

060

072

UNIT

PHASE

MAXIMUM

CONTINUOUS BHP*

MAXIMUM

OPERATING WATTS*

Three 2.40 2120

Three 2.40 2120

Three 2.90 2615

Three 2.90 2615

UNIT VOLTAGE

208/230 6.7

460 3.0
575 3.0

208/230 6.7

460 3.0
575 3.0

208/230 8.6

460 3.9
575 3.9

208/230 8.6

460 3.9
575 3.9

MAXIMUM

AMP DRAW

551B,C

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 the

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.

Table 12—Accessory/FIOP Electric Heaters Static Pressure Drop (in. wg) — 551B 036--072 and 551C 024--060

1HeaterModule 0.03 0.05

600 900 1200 1400 1600 1800 2000 2200 2400 2600

2 Heater Modules 0.14 0.15

0.07 0.09 0.09 0.10 0.11 0.11 0.12 0.13

0.16 0.16 0.16 0.17 0.17 0.17 0.18 0.18

CFM

Table 13—Accessory/FIOP EconoMi$er IV and EconoMi$er2 Static Pressure* (in. wg) — 551B 036--072 and 551C 024--060

COMPONENT

Vertical EconoMi$er IV 0.01 0.02 0.035
Horizontal EconoMi$er IV --- --- ---

LEGEND
FIOP --- F a c t o r y --- I n s t a l l e d Op t i o n
*The static pressure must be added to external static pressure. The sum and the indoor entering-air cfm should be used in conjunction with the Fan Performance

tables to determine indoor blower rpm and watts.

600 800 1000

1250 1500 1750 2000 2250 2500 2750 3000

0.045 0.065 0.08 0.12 0.145 0.175 0.22 0.255
— — 0.1 0.125 0.15 0.18 0.225 0.275

CFM

33

(Cfm)

551B,C

Table 14 — Evaporator-Fan Motor Efficiency

MOTOR 551B EFFICIENCY

024, 036, 048

060
072

*Single-phase/3-phase.
NOTE: Convert watts to bhp using the following formula:

watts input x motor efficiency

bhp =

746

75

74/84*

84

GENERAL FAN PERFORMANCE NOTES

1. Values include losses for filters, unit casing, and wet coils. See Table 12 and 13 and Fig. 36 for accessory/FIOP static pressure
information.

2. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with confidence. Using the
fan motors up to the ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.
See Table 10 and 11 on this page for additional information.

3. Use of a field-supplied motor may affect wire sizing. Contact your Bryant representative to verify.

4. Interpolation is permissible. Do not extrapolate.

5. Performance includes clean filter and wet coil.

Table 14—Fan Performance 551C 024 — Vertical Discharge Units; Standard Motor (Belt Drive)**

AIRFLOW

600
700
800
900

1000

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.4 0.6 0.8 1.0

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp

500 0.08 531 0.08 607 0.14 713 0.21 788 0.29
529 0.09 567 0.09 633 0.16 739 0.24 816 0.32
547 0.1 592 0.12 660 0.19 761 0.27 845 0.37
570 0.13 620 0.14 691 0.22 793 0.32 870 0.42
599 0.15 650 0.16 717 0.26 818 0.36 894 0.47

Rpm Bhp

878 0.37

902 0.41
937 0.47
957 0.53
981 0.58

34

Table 15—Fan Performance 551B 036, 551C 036 — Vertical Discharge Units; Standard Motor

CFM

CFM

CFM

CFM

(Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp W atts Rpm Bhp W atts Rpm Bhp W atts

900 566 0.14 142 690 0.23 228 791 0.32 320 879 0.42 418 957 0.52 522
1000 598 0.17 173 718 0.27 267 817 0.37 366 903 0.47 471 981 0.58 581
1100 632 0.21 210 748 0.31 311 844 0.42 418 929 0.53 530 1006 0.65 646
1200 666 0.25 252 778 0.36 361 873 0.48 476 956 0.60 594 1031 0.72 718
1300 701 0.30 300 809 0.42 418 902 0.54 540 983 0.67 665 1057 0.80 796
1400 737 0.36 355 842 0.48 481 932 0.61 610 1012 0.75 744 1085 0.89 881
1500 774 0.42 417 875 0.55 551 962 0.69 689 1041 0.83 830 1112 0.98 974

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 1029 0.63 630 1095 0.75 742 1157 0.86 859 1216 0.99 980 1272 1.11 1105

1000 1052 0.70 695 1118 0.82 814 1179 0.94 937 1237 1.07 1064 1293 1.20 1195
1100 1076 0.77 767 1141 0.90 892 1202 1.03 1021 1260 1.16 1154 — — —
1200 1100 0.85 845 1165 0.98 977 1225 1.12 1112 — — — — — —
1300 1126 0.94 930 1189 1.07 1069 — — — — — — — — —
1400 1152 1.03 1023 1215 1.17 1168 — — — — — — — — —
1500 1179 1.13 1123 — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 680 to 1044 rpm. All other rpms require field-supplied

drive.

Table 16—Fan Performance 551B 036, 551C 036 — Vertical Discharge Units; High-Static Motor

(Belt Drive)*

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 566 0.14 142 690 0.23 228 791 0.32 320 879 0.42 418 957 0.52 522
1000 598 0.17 173 718 0.27 267 817 0.37 366 903 0.47 471 981 0.58 581
1100 632 0.21 210 748 0.31 311 844 0.42 418 929 0.53 530 1006 0.65 646
1200 666 0.25 252 778 0.36 361 873 0.48 476 956 0.60 594 1031 0.72 718
1300 701 0.30 300 809 0.42 418 902 0.54 540 983 0.67 665 1057 0.80 796
1400 737 0.36 355 842 0.48 481 932 0.61 610 1012 0.75 744 1085 0.89 881
1500 774 0.42 417 875 0.55 551 962 0.69 689 1041 0.83 830 1112 0.98 974

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 1029 0.63 630 1095 0.75 742 1157 0.86 859 1216 0.99 980 1272 1.11 1105
1000 1052 0.70 695 1118 0.82 814 1179 0.94 937 1237 1.07 1064 1293 1.20 1195
1100 1076 0.77 767 1141 0.90 892 1202 1.03 1021 1260 1.16 1154 1314 1.30 1291
1200 1100 0.85 845 1165 0.98 977 1225 1.12 1112 1282 1.26 1252 1337 1.40 1395
1300 1126 0.94 930 1189 1.07 1069 1249 1.22 1211 1306 1.36 1356 1360 1.51 1506
1400 1152 1.03 1023 1215 1.17 1168 1274 1.32 1317 1330 1.48 1469 1384 1.63 1625
1500 1179 1.13 1123 1241 1.28 1275 1300 1.44 1431 1355 1.60 1590 1408 1.76 1752

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 680 to 1044 rpm. All other rpms require field-supplied

drive.

35

Table 17—Fan Performance 551B 048, 551C 048 — Vertical Discharge Units; Standard Motor

CFM

CFM

CFM

CFM

(Belt Drive)*

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1200 666 0.25 252 778 0.36 361 873 0.48 476 956 0.60 594 1031 0.72 718
1300 701 0.30 300 809 0.42 418 902 0.54 540 983 0.67 665 1057 0.80 796
1400 737 0.36 355 842 0.48 481 932 0.61 610 1012 0.75 744 1085 0.89 881
1500 774 0.42 417 875 0.55 551 962 0.69 689 1041 0.83 830 1112 0.98 974
1600 811 0.49 487 909 0.63 629 994 0.78 774 1071 0.93 923 1141 1.08 1076
1700 849 0.57 565 943 0.72 715 1026 0.87 869 1101 1.03 1025 1170 1.19 1185
1800 887 0.65 651 978 0.81 810 1059 0.98 972 1133 1.14 1136 — — —
1900 926 0.75 746 1014 0.92 914 1092 1.09 1084 — — — — — —
2000 965 0.86 852 1050 1.03 1028 — — — — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1200 1100 0.85 845 1165 0.98 977 1225 1.12 1112 — — — — — —
1300 1126 0.94 930 1189 1.07 1069 — — — — — — — — —
1400 1152 1.03 1023 1215 1.17 1168 — — — — — — — — —
1500 1179 1.13 1123 — — — — — — — — — — — —
1600 — — — — — — — — — — — — — — —
1700 — — — — — — — — — — — — — — —
1800 — — — — — — — — — — — — — — —
1900 — — — — — — — — — — — — — — —
2000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 770 to 1185 rpm. All other rpms require field-supplied

drive.

Table 18—Fan Performance 551B 048, 551C 048 — Vertical Discharge Units; High-Static Motor

(Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1200 666 0.25 252 778 0.36 361 873 0.48 476 956 0.60 594 1031 0.72 718
1300 701 0.30 300 809 0.42 418 902 0.54 540 983 0.67 665 1057 0.80 796
1400 737 0.36 355 842 0.48 481 932 0.61 610 1012 0.75 744 1085 0.89 881
1500 774 0.42 417 875 0.55 551 962 0.69 689 1041 0.83 830 1112 0.98 974
1600 811 0.49 487 909 0.63 629 994 0.78 774 1071 0.93 923 1141 1.08 1076
1700 849 0.57 565 943 0.72 715 1026 0.87 869 1101 1.03 1025 1170 1.19 1185
1800 887 0.65 651 978 0.81 810 1059 0.98 972 1133 1.14 1136 1200 1.31 1304
1900 926 0.75 746 1014 0.92 914 1092 1.09 1084 1164 1.26 1257 1231 1.44 1432
2000 965 0.86 852 1050 1.03 1028 1127 1.21 1206 1197 1.39 1387 1262 1.58 1570

AIRFLOW

1.2 1.4 1.6 1.8 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1200 1100 0.85 845 1165 0.98 977 1225 1.12 1112 1282 1.26 1252 1337 1.40 1395
1300 1126 0.94 930 1189 1.07 1069 1249 1.22 1211 1306 1.36 1356 1360 1.51 1506
1400 1152 1.03 1023 1215 1.17 1168 1274 1.32 1317 1330 1.48 1469 1384 1.63 1625
1500 1179 1.13 1123 1241 1.28 1275 1300 1.44 1431 1355 1.60 1590 1408 1.76 1752
1600 1206 1.24 1231 1268 1.40 1391 1326 1.56 1553 1381 1.73 1719 1433 1.90 1888
1700 1235 1.36 1349 1295 1.52 1515 1352 1.69 1685 1407 1.87 1858 1459 2.04 2034
1800 1264 1.48 1475 1323 1.66 1649 1380 1.84 1826 1434 2.02 2006 1485 2.20 2189
1900 1293 1.62 1611 1352 1.80 1792 1408 1.99 1976 1461 2.17 2163 1512 2.37 2353
2000 1324 1.77 1756 1381 1.96 1945 1436 2.15 2137 1489 2.34 2332 — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

EXTERNAL STATIC PRESSURE (in. wg)

EXTERNAL STATIC PRESSURE (in. wg)

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied

drive.

36

Table 19—Fan Performance 551B 060, 551C 060 Single-Phase — Vertical Discharge Units; Standard Motor (Belt Drive)*

CFM

CFM

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 790 0.40 353 897 0.53 471 991 0.68 600 1075 0.83 739 1152 1.00 888
1600 828 0.46 412 931 0.60 536 1022 0.75 670 1104 0.92 813 1180 1.09 966
1700 866 0.54 478 966 0.68 608 1054 0.84 747 1134 1.01 895 1208 1.19 1053
1800 905 0.62 551 1001 0.77 687 1087 0.94 832 1165 1.11 985 1238 1.29 1148
1900 944 0.71 633 1037 0.87 774 1120 1.04 925 1197 1.22 1084 — — —
2000 983 0.81 723 1073 0.98 870 1154 1.16 1026 — — — — — —
2100 1023 0.92 821 1110 1.10 975 1189 1.28 1137 — — — — — —
2200 1063 1.05 929 1147 1.23 1089 — — — — — — — — —
2300 1104 1.18 1046 — — — — — — — — — — — —
2400 — — — — — — — — — — — — — — —
2500 — — — — — — — — — — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1224 1.18 1045 — — — — — — — — — — — —
1600 1250 1.27 1128 — — — — — — — — — — — —
1700 — — — — — — — — — — — — — — —
1800 — — — — — — — — — — — — — — —
1900 — — — — — — — — — — — — — — —
2000 — — — — — — — — — — — — — — —
2100 — — — — — — — — — — — — — — —
2200 — — — — — — — — — — — — — — —
2300 — — — — — — — — — — — — — — —
2400 — — — — — — — — — — — — — — —
2500 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.30.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied

drive.

551B,C

37

Table 20—Fan Performance 551B 060, 551C 060 Three-Phase — Vertical Discharge Units; Standard Motor (Belt Drive)*

CFM

CFM

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 790 0.40 353 897 0.53 471 991 0.68 600 1075 0.83 739 1152 1.00 888
1600 828 0.46 412 931 0.60 536 1022 0.75 670 1104 0.92 813 1180 1.09 966
1700 866 0.54 478 966 0.68 608 1054 0.84 747 1134 1.01 895 1208 1.19 1053
1800 905 0.62 551 1001 0.77 687 1087 0.94 832 1165 1.11 985 1238 1.29 1148
1900 944 0.71 633 1037 0.87 774 1120 1.04 925 1197 1.22 1084 1268 1.41 1251
2000 983 0.81 723 1073 0.98 870 1154 1.16 1026 1229 1.34 1190 1299 1.53 1362
2100 1023 0.92 821 1110 1.10 975 1189 1.28 1137 1262 1.47 1306 1330 1.67 1483
2200 1063 1.05 929 1147 1.23 1089 1224 1.41 1256 1295 1.61 1431 1362 1.82 1614
2300 1104 1.18 1046 1185 1.37 1212 1260 1.56 1386 1329 1.76 1567 1395 1.98 1754
2400 1145 1.32 1174 1223 1.52 1346 1296 1.72 1526 1364 1.93 1712 1428 2.15 1905
2500 1185 1.48 1311 1262 1.68 1490 1333 1.89 1676 1399 2.10 1868 1462 2.33 2067

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1224 1.18 1045 1291 1.36 1212 1354 1.56 1387 1414 1.77 1570 1472 1.98 1761
1600 1250 1.27 1128 1316 1.46 1299 1379 1.66 1478 1438 1.87 1664 1495 2.09 1858
1700 1278 1.37 1219 1343 1.57 1394 1405 1.77 1576 1463 1.99 1766 1520 2.21 1964
1800 1306 1.48 1318 1370 1.69 1497 1431 1.90 1683 1489 2.11 1877 1545 2.34 2078
1900 1335 1.61 1426 1398 1.81 1609 1458 2.03 1799 1515 2.25 1997 — — —
2000 1364 1.74 1542 1427 1.95 1730 1486 2.17 1925 1542 2.39 2126 — — —
2100 1395 1.88 1668 1456 2.09 1860 1514 2.32 2060 — — — — — —
2200 1426 2.03 1804 1486 2.25 2001 — — — — — — — — —
2300 1457 2.19 1949 — — — — — — — — — — — —
2400 1489 2.37 2106 — — — — — — — — — — — —
2500 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied

drive.

38

Table 21—Fan Performance 551B 060, 551C 060 — Vertical Discharge Units; High-Static Motor

CFM

CFM

(Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 790 0.40 353 897 0.53 471 991 0.68 600 1075 0.83 739 1152 1.00 888
1600 828 0.46 412 931 0.60 536 1022 0.75 670 1104 0.92 813 1180 1.09 966
1700 866 0.54 478 966 0.68 608 1054 0.84 747 1134 1.01 895 1208 1.19 1053
1800 905 0.62 551 1001 0.77 687 1087 0.94 832 1165 1.11 985 1238 1.29 1148
1900 944 0.71 633 1037 0.87 774 1120 1.04 925 1197 1.22 1084 1268 1.41 1251
2000 983 0.81 723 1073 0.98 870 1154 1.16 1026 1229 1.34 1190 1299 1.53 1362
2100 1023 0.92 821 1110 1.10 975 1189 1.28 1137 1262 1.47 1306 1330 1.67 1483
2200 1063 1.05 929 1147 1.23 1089 1224 1.41 1256 1295 1.61 1431 1362 1.82 1614
2300 1104 1.18 1046 1185 1.37 1212 1260 1.56 1386 1329 1.76 1567 1395 1.98 1754
2400 1145 1.32 1174 1223 1.52 1346 1296 1.72 1526 1364 1.93 1712 1428 2.15 1905
2500 1185 1.48 1311 1262 1.68 1490 1333 1.89 1676 1399 2.10 1868 1462 2.33 2067

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1224 1.18 1045 1291 1.36 1212 1354 1.56 1387 1414 1.77 1570 1472 1.98 1761
1600 1250 1.27 1128 1316 1.46 1299 1379 1.66 1478 1438 1.87 1664 1495 2.09 1858
1700 1278 1.37 1219 1343 1.57 1394 1405 1.77 1576 1463 1.99 1766 1520 2.21 1964
1800 1306 1.48 1318 1370 1.69 1497 1431 1.90 1683 1489 2.11 1877 1545 2.34 2078
1900 1335 1.61 1426 1398 1.81 1609 1458 2.03 1799 1515 2.25 1997 1570 2.48 2202
2000 1364 1.74 1542 1427 1.95 1730 1486 2.17 1925 1542 2.39 2126 1596 2.63 2335
2100 1395 1.88 1668 1456 2.09 1860 1514 2.32 2060 1570 2.55 2265 1623 2.79 2478
2200 1426 2.03 1804 1486 2.25 2001 1543 2.48 2204 1598 2.72 2415 — — —
2300 1457 2.19 1949 1516 2.42 2151 1573 2.66 2360 1627 2.90 2574 — — —
2400 1489 2.37 2106 1547 2.60 2312 1603 2.84 2526 — — — — — —
2500 1522 2.56 2272 1579 2.80 2484 — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied

drive.

551B,C

39

Table 22—Fan Performance 551B 072 — Vertical Discharge Units; Standard Motor (Belt Drive)*

CFM

CFM

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1800 907 0.63 558 1006 0.80 708 1092 0.97 860 1169 1.14 1015 1239 1.32 1174
1900 945 0.72 638 1042 0.90 796 1126 1.08 956 1201 1.26 1119 1271 1.45 1285
2000 984 0.82 727 1078 1.00 892 1160 1.19 1060 1235 1.39 1230 1303 1.58 1403
2100 1024 0.93 823 1115 1.12 997 1195 1.32 1173 1268 1.52 1350 1335 1.72 1531
2200 1063 1.05 929 1152 1.25 1111 1230 1.46 1294 1302 1.67 1480 1368 1.88 1668
2300 1103 1.18 1044 1189 1.39 1234 1266 1.60 1425 1337 1.82 1618 1402 2.04 1814
2400 1143 1.32 1168 1227 1.54 1367 1302 1.76 1566 1371 1.99 1767 1435 2.22 1970
2500 1183 1.47 1303 1265 1.70 1510 1339 1.93 1717 1406 2.17 1926 — — —
2600 1224 1.63 1448 1303 1.87 1663 1375 2.12 1878 1442 2.36 2095 — — —
2700 1264 1.81 1604 1342 2.06 1828 1412 2.31 2051 — — — — — —
2800 1305 1.99 1772 1381 2.26 2003 — — — — — — — — —
2900 1346 2.20 1951 — — — — — — — — — — — —
3000 — — — — — — — — — — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1800 1304 1.51 1337 1365 1.69 1503 1422 1.88 1674 1477 2.08 1848 1528 2.28 2025
1900 1335 1.64 1454 1395 1.83 1627 1452 2.03 1804 1506 2.23 1984 — — —
2000 1366 1.78 1580 1426 1.98 1760 1482 2.19 1943 1535 2.40 2130 — — —
2100 1398 1.93 1715 1457 2.14 1901 1512 2.35 2091 — — — — — —
2200 1430 2.09 1858 1488 2.31 2052 — — — — — — — — —
2300 1462 2.27 2012 — — — — — — — — — — — —
2400 — — — — — — — — — — — — — — —
2500 — — — — — — — — — — — — — — —
2600 — — — — — — — — — — — — — — —
2700 — — — — — — — — — — — — — — —
2800 — — — — — — — — — — — — — — —
2900 — — — — — — — — — — — — — — —
3000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1120 to 1585 rpm. All other rpms require field-supplied

drive.

40

Table 23—Fan Performance 551B 072 — Vertical Discharge Units; High-Static Motor (Belt Drive)*

CFM

CFM

(Cfm)

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1800 907 0.63 558 1006 0.80 708 1092 0.97 860 1169 1.14 1015 1239 1.32 1174
1900 945 0.72 638 1042 0.90 796 1126 1.08 956 1201 1.26 1119 1271 1.45 1285
2000 984 0.82 727 1078 1.00 892 1160 1.19 1060 1235 1.39 1230 1303 1.58 1403
2100 1024 0.93 823 1115 1.12 997 1195 1.32 1173 1268 1.52 1350 1335 1.72 1531
2200 1063 1.05 929 1152 1.25 1111 1230 1.46 1294 1302 1.67 1480 1368 1.88 1668
2300 1103 1.18 1044 1189 1.39 1234 1266 1.60 1425 1337 1.82 1618 1402 2.04 1814
2400 1143 1.32 1168 1227 1.54 1367 1302 1.76 1566 1371 1.99 1767 1435 2.22 1970
2500 1183 1.47 1303 1265 1.70 1510 1339 1.93 1717 1406 2.17 1926 1470 2.41 2136
2600 1224 1.63 1448 1303 1.87 1663 1375 2.12 1878 1442 2.36 2095 1504 2.60 2313
2700 1264 1.81 1604 1342 2.06 1828 1412 2.31 2051 1478 2.56 2275 1539 2.82 2501
2800 1305 1.99 1772 1381 2.26 2003 1450 2.52 2235 1514 2.78 2467 — — —
2900 1346 2.20 1951 1420 2.47 2191 1488 2.74 2431 — — — — — —
3000 1387 2.41 2142 1459 2.69 2391 — — — — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1800 1304 1.51 1337 1365 1.69 1503 1422 1.88 1674 1477 2.08 1848 1528 2.28 2025
1900 1335 1.64 1454 1395 1.83 1627 1452 2.03 1804 1506 2.23 1984 1557 2.44 2168
2000 1366 1.78 1580 1426 1.98 1760 1482 2.19 1943 1535 2.40 2130 1586 2.61 2319
2100 1398 1.93 1715 1457 2.14 1901 1512 2.35 2091 1565 2.57 2284 1616 2.79 2481
2200 1430 2.09 1858 1488 2.31 2052 1543 2.53 2249 1596 2.76 2449 — — —
2300 1462 2.27 2012 1520 2.49 2212 1574 2.72 2416 — — — — — —
2400 1495 2.45 2175 1552 2.68 2383 — — — — — — — — —
2500 1529 2.64 2349 1585 2.89 2564 — — — — — — — — —
2600 1562 2.85 2533 — — — — — — — — — — — —
2700 — — — — — — — — — — — — — — —
2800 — — — — — — — — — — — — — — —
2900 — — — — — — — — — — — — — — —
3000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied

drive.

551B,C

Table 24—Fan Performance 551C 024 — Horizontal Discharge Units; Standard Motor (Belt Drive)**

AIRFLOW

600
700
800
900

1000

0.1 0.2 0.4 0.6 0.8 1.0

Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp

490 0.08 521 0.08 597 0.14 703 0.21 788 0.29
519 0.09 557 0.09 623 0.16 729 0.24 816 0.32
537 0.1 582 0.12 650 0.19 751 0.27 845 0.37
560 0.13 610 0.14 681 0.22 783 0.32 870 0.42
589 0.15 640 0.16 707 0.26 808 0.36 894 0.47

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp

868 0.37

892 0.41
927 0.47
947 0.53
971 0.58

41

Table 25—Fan Performance 551B 036, 551C 036 — Horizontal Discharge Units; Standard Motor

CFM

CFM

CFM

AIRFLOW

CFM

(Belt Drive)*

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 554 0.14 134 681 0.22 222 783 0.32 316 870 0.42 416 947 0.53 523
1000 583 0.16 163 707 0.26 257 808 0.36 358 894 0.47 465 971 0.58 578
1100 612 0.20 195 735 0.30 298 834 0.41 406 919 0.52 519 995 0.64 638
1200 643 0.23 233 762 0.35 344 860 0.46 459 944 0.58 579 1020 0.71 705
1300 674 0.28 276 791 0.40 395 887 0.52 517 970 0.65 645 1045 0.78 777
1400 706 0.33 324 820 0.45 451 914 0.59 582 997 0.72 717 1071 0.86 857
1500 738 0.38 379 849 0.52 515 942 0.66 653 1024 0.80 796 1097 0.95 942

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 1017 0.64 635 1082 0.76 753 1143 0.88 876 1200 1.01 1004 1254 1.14 1136
1000 1041 0.70 696 1105 0.82 820 1166 0.95 948 1223 1.09 1081 — — —
1100 1065 0.77 763 1129 0.90 892 1189 1.03 1026 1245 1.17 1165 — — —
1200 1089 0.84 835 1153 0.98 971 1212 1.12 1111 — — — — — —
1300 1114 0.92 915 1177 1.06 1056 — — — — — — — — —
1400 1139 1.01 1000 1202 1.15 1149 — — — — — — — — —
1500 1164 1.10 1093 — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 680 to 1044 rpm. All other rpms require field-supplied

drive.

Table 26—Fan Performance 551B 036, 551C 036 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 554 0.14 134 681 0.22 222 783 0.32 316 870 0.42 416 947 0.53 523
1000 583 0.16 163 707 0.26 257 808 0.36 358 894 0.47 465 971 0.58 578
1100 612 0.20 195 735 0.30 298 834 0.41 406 919 0.52 519 995 0.64 638
1200 643 0.23 233 762 0.35 344 860 0.46 459 944 0.58 579 1020 0.71 705
1300 674 0.28 276 791 0.40 395 887 0.52 517 970 0.65 645 1045 0.78 777
1400 706 0.33 324 820 0.45 451 914 0.59 582 997 0.72 717 1071 0.86 857
1500 738 0.38 379 849 0.52 515 942 0.66 653 1024 0.80 796 1097 0.95 942

1.2 1.4 1.6 1.8 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

900 1017 0.64 635 1082 0.76 753 1143 0.88 876 1200 1.01 1004 1254 1.14 1136
1000 1041 0.70 696 1105 0.82 820 1166 0.95 948 1223 1.09 1081 1276 1.23 1219
1100 1065 0.77 763 1129 0.90 892 1189 1.03 1026 1245 1.17 1165 1299 1.32 1308
1200 1089 0.84 835 1153 0.98 971 1212 1.12 1111 1269 1.26 1256 1322 1.41 1404
1300 1114 0.92 915 1177 1.06 1056 1236 1.21 1202 1292 1.36 1353 1346 1.52 1508
1400 1139 1.01 1000 1202 1.15 1149 1261 1.31 1301 1316 1.47 1457 1369 1.63 1618
1500 1164 1.10 1093 1227 1.25 1248 1285 1.41 1407 1341 1.58 1570 1394 1.75 1736

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

EXTERNAL STATIC PRESSURE (in. wg)

EXTERNAL STATIC PRESSURE (in. wg)

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied

drive.

42

Table 27—Fan Performance 551B 048, 551C 048 — Horizontal Discharge Units; Standard Motor

CFM

CFM

CFM

CFM

(Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1200 643 0.23 233 762 0.35 344 860 0.46 459 944 0.58 579 1020 0.71 705
1300 674 0.28 276 791 0.40 395 887 0.52 517 970 0.65 645 1045 0.78 777
1400 706 0.33 324 820 0.45 451 914 0.59 582 997 0.72 717 1071 0.86 857
1500 738 0.38 379 849 0.52 515 942 0.66 653 1024 0.80 796 1097 0.95 942
1600 771 0.44 440 879 0.59 584 971 0.74 731 1051 0.89 881 1124 1.04 1035
1700 804 0.51 507 910 0.66 661 1000 0.82 816 1079 0.98 974 1151 1.14 1136
1800 837 0.59 582 941 0.75 745 1029 0.91 909 1107 1.08 1075 — — —
1900 871 0.67 665 972 0.84 837 1059 1.02 1010 1136 1.19 1184 — — —
2000 906 0.76 756 1004 0.94 938 1089 1.12 1119 — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1200 1089 0.84 835 1153 0.98 971 1212 1.12 1111 — — — — — —
1300 1114 0.92 915 1177 1.06 1056 — — — — — — — — —
1400 1139 1.01 1000 1202 1.15 1149 — — — — — — — — —
1500 1164 1.10 1093 — — — — — — — — — — — —
1600 1190 1.20 1193 — — — — — — — — — — — —
1700 — — — — — — — — — — — — — — —
1800 — — — — — — — — — — — — — — —
1900 — — — — — — — — — — — — — — —
2000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.20.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 770 to 1185 rpm. All other rpms require field-supplied

drive.

551B,C

Table 28—Fan Performance 551B 048, 551C 048 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1200 643 0.23 233 762 0.35 344 860 0.46 459 944 0.58 579 1020 0.71 705
1300 674 0.28 276 791 0.40 395 887 0.52 517 970 0.65 645 1045 0.78 777
1400 706 0.33 324 820 0.45 451 914 0.59 582 997 0.72 717 1071 0.86 857
1500 738 0.38 379 849 0.52 515 942 0.66 653 1024 0.80 796 1097 0.95 942
1600 771 0.44 440 879 0.59 584 971 0.74 731 1051 0.89 881 1124 1.04 1035
1700 804 0.51 507 910 0.66 661 1000 0.82 816 1079 0.98 974 1151 1.14 1136
1800 837 0.59 582 941 0.75 745 1029 0.91 909 1107 1.08 1075 1178 1.25 1244
1900 871 0.67 665 972 0.84 837 1059 1.02 1010 1136 1.19 1184 1206 1.37 1361
2000 906 0.76 756 1004 0.94 938 1089 1.12 1119 1165 1.31 1301 1234 1.49 1486

AIRFLOW

1.2 1.4 1.6 1.8 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1200 1089 0.84 835 1153 0.98 971 1212 1.12 1111 1269 1.26 1256 1322 1.41 1404
1300 1114 0.92 915 1177 1.06 1056 1236 1.21 1202 1292 1.36 1353 1346 1.52 1508
1400 1139 1.01 1000 1202 1.15 1149 1261 1.31 1301 1316 1.47 1457 1369 1.63 1618
1500 1164 1.10 1093 1227 1.25 1248 1285 1.41 1407 1341 1.58 1570 1394 1.75 1736
1600 1190 1.20 1193 1252 1.36 1355 1311 1.53 1520 1366 1.70 1690 1418 1.87 1863
1700 1217 1.31 1301 1278 1.48 1470 1336 1.65 1642 1391 1.83 1818 1443 2.01 1998
1800 1244 1.42 1417 1305 1.60 1593 1362 1.78 1772 1416 1.97 1955 1468 2.15 2141
1900 1271 1.55 1541 1331 1.73 1724 1388 1.92 1911 1442 2.11 2101 1494 2.31 2294
2000 1298 1.68 1674 1358 1.87 1865 1415 2.07 2059 1468 2.27 2256 — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

EXTERNAL STATIC PRESSURE (in. wg)

EXTERNAL STATIC PRESSURE (in. wg)

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1075 to 1455 rpm. All other rpms require field-supplied

drive.

43

Table 29—Fan Performance 551B 060, 551C 060 Single-Phase — Horizontal Discharge Units;

CFM

CFM

Standard Motor (Belt Drive)*

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 724 0.33 295 837 0.45 402 937 0.59 524 1028 0.74 660 1111 0.91 808
1600 757 0.39 343 866 0.51 455 962 0.65 580 1050 0.81 719 1132 0.98 870
1700 790 0.45 398 894 0.58 514 988 0.72 643 1074 0.88 784 1154 1.06 938
1800 823 0.52 458 924 0.65 579 1015 0.80 712 1099 0.96 857 1177 1.14 1013
1900 857 0.59 525 955 0.73 650 1043 0.89 787 1125 1.05 936 1201 1.23 1096
2000 892 0.67 599 986 0.82 729 1072 0.98 870 1151 1.15 1022 — — —
2100 927 0.77 680 1017 0.92 815 1101 1.08 960 1178 1.26 1116 — — —
2200 962 0.87 769 1050 1.02 909 1131 1.19 1059 — — — — — —
2300 997 0.97 865 1082 1.14 1010 — — — — — — — — —
2400 1033 1.09 970 1115 1.26 1120 — — — — — — — — —
2500 1069 1.22 1084 — — — — — — — — — — — —

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1188 1.09 970 1261 1.29 1143 — — — — — — — — —
1600 1208 1.16 1033 — — — — — — — — — — — —
1700 1229 1.24 1103 — — — — — — — — — — — —
1800 — — — — — — — — — — — — — — —
1900 — — — — — — — — — — — — — — —
2000 — — — — — — — — — — — — — — —
2100 — — — — — — — — — — — — — — —
2200 — — — — — — — — — — — — — — —
2300 — — — — — — — — — — — — — — —
2400 — — — — — — — — — — — — — — —
2500 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 1.30.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied

drive.

44

Table 30—Fan Performance 551B 060, 551C 060 Three-Phase — Horizontal Discharge Units;

CFM

CFM

Standard Motor (Belt Drive)*

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 724 0.33 295 837 0.45 402 937 0.59 524 1028 0.74 660 1111 0.91 808
1600 757 0.39 343 866 0.51 455 962 0.65 580 1050 0.81 719 1132 0.98 870
1700 790 0.45 398 894 0.58 514 988 0.72 643 1074 0.88 784 1154 1.06 938
1800 823 0.52 458 924 0.65 579 1015 0.80 712 1099 0.96 857 1177 1.14 1013
1900 857 0.59 525 955 0.73 650 1043 0.89 787 1125 1.05 936 1201 1.23 1096
2000 892 0.67 599 986 0.82 729 1072 0.98 870 1151 1.15 1022 1226 1.33 1185
2100 927 0.77 680 1017 0.92 815 1101 1.08 960 1178 1.26 1116 1251 1.44 1283
2200 962 0.87 769 1050 1.02 909 1131 1.19 1059 1206 1.37 1218 1277 1.56 1389
2300 997 0.97 865 1082 1.14 1010 1161 1.31 1165 1235 1.50 1329 1304 1.69 1503
2400 1033 1.09 970 1115 1.26 1120 1192 1.44 1279 1264 1.63 1448 1332 1.83 1625
2500 1069 1.22 1084 1149 1.39 1239 1223 1.58 1403 1293 1.77 1576 1360 1.98 1757

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1188 1.09 970 1261 1.29 1143 1330 1.49 1327 1395 1.71 1523 1457 1.95 1729
1600 1208 1.16 1033 1279 1.36 1208 1347 1.57 1394 1412 1.79 1590 1474 2.02 1797
1700 1229 1.24 1103 1299 1.44 1280 1366 1.65 1468 1429 1.88 1665 1490 2.11 1873
1800 1250 1.33 1181 1319 1.53 1360 1385 1.74 1549 1448 1.97 1748 1508 2.20 1957
1900 1273 1.43 1266 1341 1.63 1447 1405 1.84 1638 1467 2.07 1839 1527 2.31 2050
2000 1296 1.53 1359 1363 1.74 1542 1427 1.95 1736 1488 2.18 1939 — — —
2100 1320 1.64 1459 1386 1.85 1646 1448 2.07 1842 1508 2.30 2047 — — —
2200 1345 1.77 1568 1409 1.98 1758 1471 2.20 1956 — — — — — —
2300 1371 1.90 1686 1434 2.11 1878 1494 2.34 2080 — — — — — —
2400 1397 2.04 1812 1459 2.26 2008 — — — — — — — — —
2500 1424 2.19 1948 — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1035 to 1460 rpm. All other rpms require field-supplied

drive.

551B,C

45

Table 31—Fan Performance 551B 060, 551C 060 — Horizontal Discharge Units;

CFM

CFM

AIRFLOW

CFM

AIRFLOW

CFM

High--Static Motor (Belt Drive)*

551B,C

AIRFLOW

0.2 0.4 0.6 0.8 1.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 724 0.33 295 837 0.45 402 937 0.59 524 1028 0.74 660 1111 0.91 808
1600 757 0.39 343 866 0.51 455 962 0.65 580 1050 0.81 719 1132 0.98 870
1700 790 0.45 398 894 0.58 514 988 0.72 643 1074 0.88 784 1154 1.06 938
1800 823 0.52 458 924 0.65 579 1015 0.80 712 1099 0.96 857 1177 1.14 1013
1900 857 0.59 525 955 0.73 650 1043 0.89 787 1125 1.05 936 1201 1.23 1096
2000 892 0.67 599 986 0.82 729 1072 0.98 870 1151 1.15 1022 1226 1.33 1185
2100 927 0.77 680 1017 0.92 815 1101 1.08 960 1178 1.26 1116 1251 1.44 1283
2200 962 0.87 769 1050 1.02 909 1131 1.19 1059 1206 1.37 1218 1277 1.56 1389
2300 997 0.97 865 1082 1.14 1010 1161 1.31 1165 1235 1.50 1329 1304 1.69 1503
2400 1033 1.09 970 1115 1.26 1120 1192 1.44 1279 1264 1.63 1448 1332 1.83 1625
2500 1069 1.22 1084 1149 1.39 1239 1223 1.58 1403 1293 1.77 1576 1360 1.98 1757

AIRFLOW

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1500 1188 1.09 970 1261 1.29 1143 1330 1.49 1327 1395 1.71 1523 1457 1.95 1729
1600 1208 1.16 1033 1279 1.36 1208 1347 1.57 1394 1412 1.79 1590 1474 2.02 1797
1700 1229 1.24 1103 1299 1.44 1280 1366 1.65 1468 1429 1.88 1665 1490 2.11 1873
1800 1250 1.33 1181 1319 1.53 1360 1385 1.74 1549 1448 1.97 1748 1508 2.20 1957
1900 1273 1.43 1266 1341 1.63 1447 1405 1.84 1638 1467 2.07 1839 1527 2.31 2050
2000 1296 1.53 1359 1363 1.74 1542 1427 1.95 1736 1488 2.18 1939 1546 2.42 2151
2100 1320 1.64 1459 1386 1.85 1646 1448 2.07 1842 1508 2.30 2047 1566 2.55 2262
2200 1345 1.77 1568 1409 1.98 1758 1471 2.20 1956 1530 2.44 2164 1587 2.68 2380
2300 1371 1.90 1686 1434 2.11 1878 1494 2.34 2080 1553 2.58 2290 1609 2.83 2509
2400 1397 2.04 1812 1459 2.26 2008 1518 2.49 2213 1576 2.73 2425 — — —
2500 1424 2.19 1948 1484 2.42 2147 1543 2.65 2355 1599 2.89 2571 — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See general fan performance notes.

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied

drive.

Table 32—Fan Performance 551C 072 — Horizontal Discharge Units; Standard Motor (Belt Drive)*

1800 822 0.51 455 927 0.66 589 1018 0.82 728 1100 0.98 873 1174 1.15 1024

1900 855 0.59 520 957 0.74 659 1046 0.91 805 1127 1.08 956 1200 1.25 1113
2000 889 0.66 591 988 0.83 737 1075 1.00 888 1154 1.18 1045 1226 1.36 1208
2100 923 0.75 668 1019 0.92 821 1104 1.10 979 1182 1.29 1142 1253 1.48 1310
2200 957 0.85 753 1051 1.03 912 1134 1.21 1077 1210 1.40 1245 1280 1.60 1419
2300 992 0.95 845 1083 1.14 1011 1164 1.33 1182 1239 1.53 1357 1308 1.73 1537
2400 1026 1.06 945 1115 1.26 1118 1195 1.46 1295 1268 1.66 1476 1336 1.87 1662
2500 1061 1.19 1053 1148 1.39 1233 1226 1.59 1416 1297 1.81 1604 1364 2.02 1796
2600 1097 1.32 1169 1181 1.53 1356 1257 1.74 1546 1327 1.96 1740 1393 2.18 1938
2700 1132 1.46 1294 1214 1.67 1487 1289 1.90 1684 1358 2.12 1885 1422 2.35 2089
2800 1168 1.61 1428 1247 1.83 1629 1320 2.06 1832 1388 2.30 2039 — — —
2900 1204 1.77 1572 1281 2.00 1779 1353 2.24 1989 — — — — — —
3000 1240 1.94 1725 1315 2.18 1939 — — — — — — — — —

1800 1244 1.33 1182 1308 1.51 1345 1369 1.70 1513 1427 1.90 1687 1483 2.10 1867
1900 1268 1.44 1275 1332 1.63 1443 1393 1.82 1617 1450 2.02 1796 1505 2.23 1979
2000 1294 1.55 1376 1357 1.74 1549 1417 1.95 1727 1474 2.15 1911 1528 2.36 2100
2100 1320 1.67 1483 1382 1.87 1662 1441 2.08 1845 1498 2.29 2034 — — —
2200 1346 1.80 1598 1408 2.01 1782 1466 2.22 1971 — — — — — —
2300 1372 1.94 1721 1434 2.15 1911 1491 2.37 2105 — — — — — —
2400 1400 2.09 1852 1460 2.31 2047 — — — — — — — — —
2500 1427 2.24 1992 — — — — — — — — — — — —
2600 — — — — — — — — — — — — — — —
2700 — — — — — — — — — — — — — — —
2800 — — — — — — — — — — — — — — —
2900 — — — — — — — — — — — — — — —
3000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.40.

3. See general fan performance notes.

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

0.2 0.4 0.6 0.8 1.0

1.2 1.4 1.6 1.8 2.0

EXTERNAL STATIC PRESSURE (in. wg)

EXTERNAL STATIC PRESSURE (in. wg)

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1120 to 1585 rpm. All other rpms require field-supplied

drive.

46

Table 33—Fan Performance 551B 072 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*

AIRFLOW

CFM

AIRFLOW

CFM

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

0.2 0.4 0.6 0.8 1.0

1800 822 0.51 455 927 0.66 589 1018 0.82 728 1100 0.98 873 1174 1.15 1024
1900 855 0.59 520 957 0.74 659 1046 0.91 805 1127 1.08 956 1200 1.25 1113
2000 889 0.66 591 988 0.83 737 1075 1.00 888 1154 1.18 1045 1226 1.36 1208
2100 923 0.75 668 1019 0.92 821 1104 1.10 979 1182 1.29 1142 1253 1.48 1310
2200 957 0.85 753 1051 1.03 912 1134 1.21 1077 1210 1.40 1245 1280 1.60 1419
2300 992 0.95 845 1083 1.14 1011 1164 1.33 1182 1239 1.53 1357 1308 1.73 1537
2400 1026 1.06 945 1115 1.26 1118 1195 1.46 1295 1268 1.66 1476 1336 1.87 1662
2500 1061 1.19 1053 1148 1.39 1233 1226 1.59 1416 1297 1.81 1604 1364 2.02 1796
2600 1097 1.32 1169 1181 1.53 1356 1257 1.74 1546 1327 1.96 1740 1393 2.18 1938
2700 1132 1.46 1294 1214 1.67 1487 1289 1.90 1684 1358 2.12 1885 1422 2.35 2089
2800 1168 1.61 1428 1247 1.83 1629 1320 2.06 1832 1388 2.30 2039 1452 2.53 2249
2900 1204 1.77 1572 1281 2.00 1779 1353 2.24 1989 1419 2.48 2202 1482 2.72 2419
3000 1240 1.94 1725 1315 2.18 1939 1385 2.43 2156 1451 2.68 2376 — — —

1.2 1.4 1.6 1.8 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts
1800 1244 1.33 1182 1308 1.51 1345 1369 1.70 1513 1427 1.90 1687 1483 2.10 1867
1900 1268 1.44 1275 1332 1.63 1443 1393 1.82 1617 1450 2.02 1796 1505 2.23 1979
2000 1294 1.55 1376 1357 1.74 1549 1417 1.95 1727 1474 2.15 1911 1528 2.36 2100
2100 1320 1.67 1483 1382 1.87 1662 1441 2.08 1845 1498 2.29 2034 1552 2.51 2227
2200 1346 1.80 1598 1408 2.01 1782 1466 2.22 1971 1522 2.44 2165 1575 2.66 2363
2300 1372 1.94 1721 1434 2.15 1911 1491 2.37 2105 1547 2.59 2304 1600 2.82 2507
2400 1400 2.09 1852 1460 2.31 2047 1517 2.53 2247 1572 2.76 2451 — — —
2500 1427 2.24 1992 1487 2.47 2192 1543 2.70 2398 — — — — — —
2600 1455 2.41 2140 1514 2.64 2346 1570 2.88 2557 — — — — — —
2700 1483 2.59 2297 1541 2.83 2509 — — — — — — — — —
2800 1512 2.77 2463 — — — — — — — — — — — —
2900 1541 2.97 2640 — — — — — — — — — — — —
3000 — — — — — — — — — — — — — — —

NOTES:

1. Bold cells indicate field-supplied drive is required.

2. Maximum continuous bhp is 2.90.

3. See general fan performance notes.

EXTERNAL STATIC PRESSURE (in. wg)

EXTERNAL STATIC PRESSURE (in. wg)

LEGEND

Bhp — Brake Horsepower
Watts — Input Watts to Motor

*Motor drive range: 1300 to 1685 rpm. All other rpms require field-supplied

drive.

551B,C

47

551B,C

PRE-START-UP

!

FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal
injury, death, and/or property damage.

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

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

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

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

5. Never attempt to repair a soldered connection while

the refrigerant system is under pressure.

6. Do not use a torch to remove any component. The
system contains oil and refrigerant under pressure. To
remove a component, wear protective goggles and
proceed as follows:

a. Shut off electrical power to the unit and tag

b. Recover refrigerant to relieve all pressure

c. Cut component connection tubing with a

d.Carefully unsweat the remaining tubing

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,
CAUTION, 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, etc.

b. Inspect for oilat all refrigerant tubing connectionsand 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 arecompleted and tight. Be sure
that wires are not in contact with refrigerant tubing or
sharp edges.

d. Inspect coil fins. If damaged during shipping and

handling, carefully straighten fins with a fin comb.

WARNING

disconnect.

from the system using both high-pressure
and low-pressure ports.

tubing cutter, and remove the component
from the unit.

stubs when necessary. Oil can ignite when
exposed to a torch flame.

4. Verify the following conditions:
a. Make sure that condenser-fan blade are correctly

positioned in fan orifice.See Condenser-Fan Adjustment
section for more details.

b. Make sure that air filter(s) is 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.

START-UP

Unit Preparation

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

Return--Air Filters

Make sure the correct filters are installed in the unit (See Table 1).
Do not operate the unit without return-air filters.

Outdoor--Air Inlet Screens

Outdoor-air inlet screen(s) must be in place before operating the
unit.

Compressor Mounting

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

Internal Wiring

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

Refrigerant Service Ports

Each unit system has 4 Schrader--type service 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.

High Flow Valves

Two high flow refrigerant valves are located on the hot gas tube
coming out of the compressor and the suction tubes. Large black
plastic caps distinguish these valves with O--rings located inside
the caps. No field access to these valves is available at this time.
Ensure the plastic caps are in place and tight or the possibility of
refrigerant leakage could occur.

Compressor Rotation

On 3-phase units be certain that the compressor is rotating in the
proper direction. To determine whether or not compressor is
rotating in the proper direction:

1. Connect the service gauges 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 indoor fan (060 and 072 three-phase units

only) is probably also rotating in the wrong direction.

2. Turn off power to the unit and tag disconnect.

3. Reverse any two of the unit power leads.

4. Turn on power to the unit and energize the compressor.

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 more noise and does not provide cooling.

48

Cooling

Set the space thermostat to the OFF position. Set the system
selector switch at COOL position and the fan switch at AUTO
position. Adjust the thermostat to a setting below room
temperature. The compressor starts when contactor closes.

Check cooling effects at a setting below room temperature.
Check the unit charge. Refer to Refrigerant Charge section.

Reset the thermostat at a position above room temperature. The
compressor will shut off.

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

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

Heating

To start unit, turn on main power supply.
Set system selector switch at HEAT position and set thermostat at

a setting above room temperature. Set fan at AUTO position.
First stage of thermostat energizes the first--stage electric heater

elements; second stage energizes second--stage electric heater
elements, if installed. Check heating effects at air supply grille(s).

If 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 thermostat at a position below room
temperature temporarily shuts unit off until space temperature
falls below thermostat setting.

Safety Relief

A soft solder joint at the suction line fitting provides pressure
relief under abnormal temperature and pressure conditions.

Ventilation (Continuous Fan)

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

Operating Sequence

Cooling -- Units Without Economizer

When thermostat calls for cooling, terminals G and Y1 are
energized. The indoor-fan contactor (IFC), reversing valve
solenoid (RVS) and compressor contactor are energized and
indoor-fan motor, compressor, and outdoor fan starts. The
outdoor fan motor runs continuously while unit is cooling.

Heating -- Units Without

When the thermostat calls for heating, terminal W1 will be
energized with 24v. The IFC and heater contactor no. 1 (HC1)
are energized.

Cooling -- Units With EconoMi$er

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.

Integrated EconoMi$er IV operation on single-stage units
requires a 2-stage thermostat (Y1 and Y2).

Economizer

IV

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.

If the increase in cooling capacity causes the supply--air
temperature to drop below 45_F, then the outdoor--air damper
position will be fully closed. If the supply--air temperature
continues to fall, the outdoor-- air damper will close. Control
returns to normal once the supply--air temperature rises above
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
EconoMi$er IV control, a demand controlled ventilation strategy
will begin to operate. As the CO
above the CO
will be increased proportionally. As the CO
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 outdoor--air dampers
closed to maintain the proper supply--air temperature.

Heating -- Units With EconoMi$er

When the room temperature calls for heat, the heating controls are
energized as described in the Heating, Units Without Economizer
section. During the occupied mode, whenever the indoor fan
contactor is energized, the economizer damper moves to the
minimum position.

Units With Perfect Humidity
System

Normal Design Operation

When the rooftop operates under the normal sequence of
operation, the compressors will cycle to maintain indoor
conditions. (See Fig. 42.)

The Perfect Humidity adaptive 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.

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. 43.)

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.

set point, the minimum position of the damper

2

sensors are connected to the

2

level in the zone increases

2

level decreases

2

IV

 Adaptive Dehumidification

551B,C

49

551B,C

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).

C06135

Fig. 42 --- Perfect Humidityt Normal

Design Cooling Operation

C06137

Fig. 44 --- Perfect Humidity Hot Gas

Reheat Mode Operation

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. 44.)

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 will be cooled and dehumidified, but will be warmed
to neutral conditions (72_Fto75_F) by the subcooling/reheat
dehumidification coil.

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 lockout this mode of operation.

See Table 34 for the Perfect Humidity adaptive dehumidification
system sequence of operation.

SERVICE

Fig. 43 --- Perfect Humidity Subcooling

Mode Operation

C06136

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal
injury or death.

When sevicing unit, shut off all electrical power to unit
and install lockout tag.

WARNING

Step 1 —Cleaning

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

Evaporator

1. Turn unit power off, tag disconnect. Remove evaporator

2. If economizer or two-position damper is installed, remove

3. Slide filters out of unit.

50

Coil

coil access panel.

economizer by disconnecting Molex plug and
removing mounting screws.

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. Flush condensate pan after completion.

5. Reinstall economizer and filters.

6. Reconnect wiring.

7. Replace access panels.

Condenser

Coil

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

One--Row Coil

Wash coil with commercial coil cleaner. It is not necessary to
remove top panel.

2-Row Coils

Clean coil as follows:

1. Turn off unit power and tag disconnect.

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

3. Remove condenser coil corner post. (See Fig. 45.) To hold
top panel open, place coil corner post between top panel
and center post. (See Fig. 46.)

C06044

Fig. 45 --- Cleaning Condenser Coil

C06045

Fig. 46 --- Propping Up Top Panel

C06046

Fig. 47 --- Separating Coil Sections

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. 47.)

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 outer coil
section and remove the coil corner post from between the
top panel and center post. Install the coil corner and center
posts. Replace all screws.

Condensate

Drain

Check and clean each year at the start of the cooling season. In
winter, keep the drain dry or protect it against freeze-up.

Filters

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

Outdoor--Air Inlet Scr

een

Clean the screen with steam or hot water and a mild detergent. Do
not use disposable filters in place of screens.

Step 2 —Lubrication

Compressor

The compressor is charged with the correct amount of oil at the
factory.

Fan Motor

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

Evaporator Fan Belt

Inspect evaporator fan belt for wear, proper belt tension, and
pulley alignment as conditions require or at the beginning of each
heating and air conditioning season. Refer to Step 7 -- Adjust
Evaporator Fan Speed for adjustment and alignment procedures.

Bearings

Adjustment

551B,C

51

Table 34—Perfect Humidity Adaptive Dehumidification System Sequence of Operation and

System Response — Single Compressor Unit (551C 024--060, 551B 036--072)

THERMOSTAT INPUT ECONOMIZER FUNCTION 551B,C UNIT OPERATION

H Y1 Y2 OAT. < Economizer Set Point Economizer Comp. 1 Subcooling Mode Hot Gas Reheat Mode

Off — —
On On On No Off On Ye s No

On On Off No Off On Yes No
On On On Yes On On Yes No
On On Off Yes On On No Ye s
On Off Off No Off On No Ye s

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

LEGEND

OAT --- Outdoor Air Temperature

Normal Operation

Step 3 —Condenser--Fan Adjustment

Shut off unit power supply. Remove condenser-fan assembly
(grille, motor, motor cover, and fan) and loosen fan hub
setscrews. Adjust fan height as shown in Fig. 50. Tighten
setscrews and replace condenser-fan assembly.

551B,C

UNIT

024-060 and 072 (208/230 v)

072 (460 v)

FAN HEIGHT (in.) - A

2.75

3.50

C06138

Fig. 48 --- Condenser--Fan Adjustment

Step 4 —EconoMi$er IV Adjustment

Refer to Optional EconoMi$er IV section.

Step 5 —Refrigerant Charge

Amount of refrigerant charge is listed on unit nameplate (also
refer to Table 1). Refer to HVAC Servicing Procedures literature
available at your local distributor and the following procedures.

Unit panels must be in place when unit is operating during
charging procedure. Unit must operate a minimum of 10 minutes
before checking or adjusting refrigerant charge.

Charge

No

Use standard evacuating techniques. After evacuating system to
500 microns, weigh in the specified amount of refrigerant. (Refer
to Table 1 and unit information plate.)

Low Charge

Using Cooling Charging Charts, Fig. 49--52, vary refrigerant
until the conditions of the charts are met. Note the charging charts
are different from type normally used. Charts are based on
charging the units to the correct superheat for the various
operating conditions. Accurate pressure gauge and temperature
sensing device are required. Connect the pressure gauge 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. An accurate
superheat, thermocouple--type or thermistor--type thermometer,
and a gauge manifold are required when using the superheat
charging method for evaluating the unit charge. Do not use
mercury or small dial--type thermometers because they are not
adequate for this type of measurement.

Cooling

C06139

Fig. 49 --- Cooling Charging Chart,

Standard 551B 036

Perfect Humidity

 System Charging

The system charge for units with the Perfect Humidity adaptive
dehumidification system 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. 53--56. To charge
systems using the Perfect Humidity adaptive 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 adaptive
dehumidification system, charge per Fig. 53--56.

52

551B,C

Fig. 50 --- Cooling Charging Chart,

Standard 551B 048

Fig. 51 --- Cooling Charging Chart,

Standard 551B 060

C06140

C06141

C06142

Fig. 52 --- Cooling Charging Chart,

Standard 551B 072

C06143

Fig. 53 --- Cooling Charging Chart, 551B 036 with

Optional Perfect Humidity Adaptive

Dehumidification System

53

551B,C

C06144

Fig. 54 --- Cooling Charging Chart, 551B 048 with

Optional Perfect Humidity Adaptive

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
fanatfullspeed.

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.
53--56) are to be used ONLY with units having the Perfect
Humidity adaptive dehumidification system. DO NOT use
standard charge (Fig. 49-- 51 and 57--60) for units with Perfect
Humidity system, and DO NOT use Fig. 53--56 for standard
units.

C06146

Fig. 56 --- Cooling Charging Chart, 551B 072 with

Optional Perfect Humidity Adaptive

Dehumidification System

To Use Cooling Charging Chart, Standard

Unit

Take the outdoor ambient temperature and read the suction
pressure gauge. Refer to charts to determine what 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. 49):

Outdoor Temperature 75F.........................

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

Suction Temperature should be 48F..................

(Suction temperature may vary  5F.)
If a charging device is used, temperature and pressure readings

must be accomplished using the charging charts.

To Use Cooling Charging Charts, Units W
Perfect Humidity

 Adaptive Dehumidification System

ith

Refer to charts (Fig. 53--56) to determine the proper leaving
condenser pressure and temperature.

Example (Fig. 53):

Leaving Condenser Pressure 250 psig.................

Leaving Condenser Temperature 105_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
fanatfullspeed.

IMPORTANT: Refer to Troubleshooting Tables for additional
information.

Step 6 —Replacement Parts

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

Fig. 55 --- Cooling Charging Chart, 551B 048 with

Optional Perfect Humidity Adaptive

Dehumidification System

C06145

54

551C - 2 TON CHARGING CHART

Suction Line Temperature (deg C)

5.5 10.5 15.5 20.5 25.5

105.0

100.0

698.0

FC

125 52

115 4 6

105 41
95 35
85 29
75 24

95.0

90.0

85.0

80.0

75.0

Suction Line Pressure (psig)

70.0

65.0
42 52 62 72

SuctionLineTemp(degF)

Fig. 57 --- Cooling Charging Chart,

Standard 551C 024

551C -- 3 TON CHARGING CHART

Suction Line Temperature (deg C)

6.1 11.1 16.1 21.1

95.0

648.0

598.0

548.0

498.0

448.0

648.2

FC
115 4 6
105 41
95 35
85 29
75 24

Suction Line Pressure (kpa)

551B,C

C06148

85.0

75.0

Suction Line Pressure (psig)

65.0
43 48 53 58 63 68 73 78

SuctionLineTemp(degF)

Fig. 58 --- Cooling Charging Chart,

Standard 551C 036

598.2

548.2

498.2

448.2

Suction Line Pressure (kpa)

C06149

55

551C -- 4 TON CHARGING CHART

Suction Line Temperature (deg C)

5.6 10.6 15.6 20.6 25.6

97.0

87.0

FC
115 4 6
105 41

95 35
85 29
75 24

692.0

642.0

592.0

551B,C

77.0

Suction Line Pressure (psig)

67.0
42 47 52 57 62 67 72 77

SuctionLineTemp(degF)

Fig. 59 --- Cooling Charging Chart,

Standard 551C 048

551C -- 5 TON CHARGING CHART

Suction Line Temperature (deg C)

0.0 5.0 10.0 15.0 20.0 25.0

115.0

105.0

95.0

542.0

492.0

115 46

105 41
95 35
85 29
75 24

810.0

710.0

610.0

Suction Line Pressure (kpa)

C06150

FC

85.0

510.0

75.0

Suction Line Pressure (psig)

410.0

Suction Line Pressure (kpa)

65.0

55.0

310.0

42 47 52 57 62 67 72 77

SuctionLineTemp(degF)

C06151

Fig. 60 --- Cooling Charging Chart,

Standard 551C 060

56

TROUBLESHOOTING

Unit Troubleshooting

Refer to Tables 35-37 for unit troubleshooting details.

Economi$er IV Troubleshooting

See Table 38 for EconoMi$er IV logic.
A functional view of the EconoMi$er IV is shown in Fig. 61.

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

EconoMi$er IV Pr

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

8. Put 620-ohm resistor across terminals S

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.

Differential

To check differential enthalpy:

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

2. Place 620-ohm resistor across S

3. Place 1.2 kilo-ohm resistor across S
Cool LED should be lit.

4. Remove 620-ohm resistor across S
LED should turn off.

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

Enthalpy

Single

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.

eparation

and +.

O

Enthalpy

and +.

R

and +.

O

and +. The Free

R

and +. The Free Cool

O

O

and +.

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.

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.

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.

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.

551B,C

57

EconoMi$er IV Troubleshooting

CompressorandCondenserFan

ButCondenserFanRuns

.

NormallySatisfyingThermostat)

.

CompressorOperatesContinuously.

ExcessiveHeadPressure

.

HeadPressureTooLow.

ExcessiveSuctionPressure.

SuctionPressureTooLow

.

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

and +.

R

Table 35—Cooling Service Analysis

6. Remove 1.2 kilo-ohm checkout resistor from terminals S
and +. If used, reconnect sensor from terminals SOand +.

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.

O

551B,C

Compressor and Condenser Fan
Will Not Start.

Compressor Will Not Start
But Condenser Fan Runs.

CompressorCycles(OtherThan
Normally Satisfying Thermostat).

Compressor Operates Continuously.

Excessive Head Pressure.

Head Pressure Too Low.

Excessive Suction Pressure.

Suction Pressure Too Low.

Evaporator Fan Will Not Shut Off.

PROBLEM CAUSE REMEDY

Power failure. Call power company.
Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.
Defective thermostat, contactor, transformer, or

control relay.
Insufficient line voltage. Determine cause and correct.
Incorrect or faulty wiring. Check wiring diagram and rewire correctly.
Thermostat setting too high. Lower thermostat setting below room temperature.
Faulty wiring or loose connections in compres-

sor circuit.
Compressor motor burned out, seized, or in-

ternal overload open.
Defective run/start capacitor, overload, start

relay.
One leg of 3-phase power dead. Replace fuse or reset circuit breaker. Determine

Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge

Defective compressor. Replace and determine cause.
Insufficient line voltage. Determine cause and correct.
Blocked condenser. Determine cause and correct.
Defective run/start capacitor, overload, or start

relay.
Defective thermostat. Replace thermostat.
Faulty condenser-fan motor or capacitor. Replace.
Restriction in refrigerant system. Locate restriction and remove.
Dirty air filter. Replace filter.
Unit undersized for load. Decrease load or increase unit size.
Thermostat set too low. Reset thermostat.
Low refrigerant charge. Locate leak, repair, and recharge.
Leaking valves in compressor. Replace compressor .
Air in system. Recover refrigerant, evacuate system, and recharge.
Condenser coil dirty or restricted. Clean coil or remove restriction.
Dirty air filter. Replace filter.
Dirty condenser coil. Clean coil.
Refrigerant overcharged. Recover excess refrigerant.
Air in system. Recover refrigerant, evacuate system, and recharge.
Condenser air restricted or air short-cycling. Determine cause and correct.
Low refrigerant charge. Check for leaks, repair, and recharge.
Compressor valves leaking. Replace compressor.
Restrictioninliquidtube. Remove restriction.
High heat load. Check for source and eliminate.
Compressor valves leaking. Replace compressor.
Refrigerant overcharged. Recover excess refrigerant.
Dirty air filter. Replace filter.
Low refrigerant charge. Check for leaks, repair, and recharge.
Metering device or low side restricted. Remove source of restriction.
Insufficient evaporator airflow. Increase air quantity. Ch eck filter and replace if neces-

Temperature too low in conditioned area. Reset thermostat.
Outdoor ambient below 25 F. Install low-ambient kit.
Time off delay not finished. Wait for 30-second off delay.

Replace component.

Check wiring and repair or replace.

Determine cause. Replace compressor.

Determine cause and replace.

cause.

to nameplate.

Determine cause and replace.

sary.

58

Table 36—Perfect Humidity Adaptive Dehumidification System Subcooling Mode Service Analysis

WillNotEnergize

.

ExcessiveSuperheat.

D

d

C

l

V

Outd

R

Y1Y

2

Belowse

t

Hig

h

Low

MinimumpositionClosed

Low

Hig

h

Modulating(betweenmin

.

Modulating(betwee

n

Abovese

t

Hig

h

Low

Modulating††(betweenmin

.

Modulating††(betwee

n

Low

Hig

h

ModulatingModulating†††

Subcooling Mode (Liquid Reheat)
Will Not Energize.

Low System Capacity. Low refrigerant charge or frosted evaporator coil. 1. Check charge amount. Charge per Fig. 53 --- 56.

Loss of Compressor Superheat
Conditions with Subcooling/Reheat
Dehumidification Coil Energized.

No power to control transformer from
evaporator-fan motor.

No power from control transformer to liquid line
solenoid valve.

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

Liquid line solenoid valve will not open. Valve is stuck closed; replace valve.

Thermostatic expansion valve (TXV). 1. Check TXV bulb mounting, and secure tightly to suc-

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
low-pressure switch to reset. Replace switch if it will
not close.

3. Transformer bad; check transformer.

2. Solenoid valve stuck open; replace.

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

tion line.

2. Replace TXV if stuck open or closed.

Table 37—Perfect Humidity Adaptive Dehumidification System Hot Gas Reheat Mode Service Analysis

PROBLEM CAUSE REMEDY

Reheat Mode Will Not Energize. No power to control transformer from

Loss of Compressor Superheat
Conditions with Subcooling/Reheat
Dehumidification Coil Energized.

Excessive Superheat. Liquid line solenoid valve will not operate. Valve is stuck, replace valve.

PROBLEM CAUSE REMEDY

evaporator-fan motor.
No power from control transformer to hot gas

line solenoid valve

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

Low refrigerant charge or frosted evaporator coil. 1. Check charge amount. Charge per Fig. 53 ---56.

Thermostatic expansion valve (TXV). 1. Check TXV bulb mounting, and secure tightly to suc-

Hot gas line solenoid valve will not close. Valve i s stuck; replace valve.

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
low-pressure switch to reset. Replace switch if it will
not close.

3. Transformer bad; check transformer.

2. Solenoid valve stuck closed; replace.

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

tion line.

2. Replace TXV if stuck open or closed.

551B,C

Table 38—EconoMi$er IV Input/Output Logic

INPUTS OUTPUTS

eman

ontro

entilation (DCV)

Below set
(DCV LED Off)

Above set
(DCV LED On)

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

ply-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-airsig-

nal).

High
(Free Cooling LED Off)

Low
(Free Cooling LED On)

High
(Free Cooling LED Off)

Low
(Free Cooling LED On)

Enthalpy* Compressor NTerminal†

oor

eturn

Low

Y1 Y2

Stage Stage

1 2

On On On On

Minimum position Closed

Occupied Unoccupied

Damper

On Off On Off
Off Off Off Off

High

On On On Off
On Off Off Off

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

Modulating** (between
closed and full-open)

Off Off Off Off Minimum position Closed

Low

High

On On On On
On Off On Off
Off Off Off Off
On On On Off

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

Modulating†† (between
closed and DCV
maximum)

Modulating*** Modulating†††
On Off Off Off
Off Off Off Off

59

551B,C

C06053

Fig. 61 --- EconoMi$er IV Functional View

60

START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION

MODEL NO.: SERIAL NO.:

DA TE: TECHNICIAN:

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

j VERIFY THA T JOBSITE VOLT AGE AGREES WITH VOLT AGE LISTED ON RATING PLATE

j VERIFY THA T ALL PACKAGING MA TERIALS HA VE BEEN REMOVED FROM UNIT

j REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INST ALLA TION INSTRUCTIONS

j VERIFY THA T CONDENSA TE CONNECTION IS INSTALLED PER INSTALLATION INSTRUC TION S

j CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

j CHECK THA T RETURN (INDOOR) AIR FIL TERS ARE CLEAN AND IN PLACE

j VERIFY THAT UNIT INSTALLA TIO N IS LEVEL

j CHECK F A N WHEELS AND PROP ELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW

TIGHTNESS

j CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONT AC T WITH REFRIGER ANT LINES

OR SHARP METAL EDGES

j CHECK PULLEY ALIGNM ENT AND BELT TENSION PER INSTALLATION INSTRU CTIO NS

III. START-UP

551B,C

ELECTRICAL

SUPPLY VOL TAGE L1-L2 L2-L3 L3-L1

COMPRESSOR AMPS L1 L2 L3

INDOOR FAN AMPS L1

TEMPERATURES

OUTDOOR-AIR TEMPERATURE DB

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

DB WB

DB WB

L2 L3

PRESSURES (Cooling Mode)

REFRIGERANT SUCTION PSIG F

REFRIGERANT DISCHARGE PSIG F

j VERIFY THA T 3-PHASE FAN MOTOR AND BLOWER ARE ROTA TING IN CORRECT DIRECTION. IF THEY

ARE NOT ROTATING IN CORRECT DIRECTION, LOCKING COLLAR MUST BE RE--TIGHTENED AFTER
CORRECTING DIRECTION OF ROT ATION

j VERIFY THA T 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION

j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

j SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMEN TS

(IF EQUIPPED)

j ADJUST INDOOR FAN PULLEY AS REQUIRED TO MEET APPLICATION AIRFLOW REQUIREMENTS.

INSURE PULLEYS ARE PROPERL Y ALIGNED AND BEL T TENSION HAS BEEN ADJUS TED PER
INSTALLATION INSTRUCTIONS AFTER PULLEY ADJU STMEN TS

E2007 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 3/07

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

61

Catalog No. II551B--- C --- 36 --- 1

Replaces: II 551B--- 36--- 6