Bryant 576b User Manual

installation, start-up and
service instructions

COMMERCIAL AIR-COOLED
CONDENSING UNITS

IMPORTANT — READ BEFORE INSTALLING

1. Read and become familiar with these installation
instructions before installing this unit (Fig. 1).

2. Be sure the installation conforms to all applicable
local and national codes.

3. These instructions contai n importa nt inform ation for
the proper maintenance and repair of this equipment.
Retain these instructions for future u se.

CONTENTS

Page

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8

I. Locate the Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

II. Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

III. Compressor Mounting. . . . . . . . . . . . . . . . . . . . . . . . 2

IV. Unit Refrigerant Piping Connections . . . . . . . . . . . . 2

V. Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . 5

VI. Accessory Installation. . . . . . . . . . . . . . . . . . . . . . . . 8

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

I. Start-Up and Adjustments . . . . . . . . . . . . . . . . . . . . 9

CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 9

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12

I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

II. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

III. Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . 10

IV. Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

V. Compressor Removal . . . . . . . . . . . . . . . . . . . . . . . 11

VI. Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . 11

VII. Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . 11

VIII. Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . 12

IX. High Flow Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . .13,14

START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS

WARNING: Improper installation, adjustment,

alteration, service, maintenance, or use can cause
explosion, fire, electric shock, or other occurrences
which may injure you or damage your property. Con­sult a qualified installer or service agency for informa­tion or assistance. The qualified installer or agency
must use only factory-authorized kits or accessories
when repairing th is pro duc t .

569C
576B

Cancels: II 569C-72-4 II 569C-72-5

8/15/00

Fig. 1 — Typical Unit (569C072 Shown)

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 id entifies the most serious h azards which will
result in severe perso nal injury or death. Warning indicates
a condition that could result in pers onal injury. Caution is
used to identify unsafe practices whic h would res ult in minor
personal injury or product and property damage.

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

1. The power supply (volts, hertz, and phase) must cor­respond to that specified on unit rating plate.

2. The electric al supply provi ded by the utili ty must be
sufficient to handle load imposed by this unit.

3. Refer to the Locate the Unit section on page 2 and
Fig. 2 and 3 for locations of electrical inlets, required
clearances, and weight distributio n based on recom­mended support points before setting unit in place.

4. This installation must conform with local building
codes. Refer to local plumbing or wastewater codes
and other applicable local codes.

INSTALLATION

NOTE: When installing any accessory item, see the manufac-

turer’s installation instructions packaged with the accessory.
A qualified agenc y must us e f ac tor y - au th or iz e d kits or acces­sories when modif ying this unit.

The 569C072,090, and 120 units use hermetic compressors.
The 576B090,102, and 120 units use semi-hermetic compre s­sors. Refer to Table 1.

NOTE: If vibration isolators are required for a particular
installation, use corner weight information in Fig. 2 to make
proper selection.

I. LOCATE THE UNIT

A. Clearance

Maintain cleara nce around and abo ve unit to provide mi ni­mum distance from combustible materials, proper airflow,
and service access. Refer to Fig. 2.

Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible sur fac e s 0 inches.
b. Condenser coil, for proper airflow, 36 in. one side, 12 in.

the other. The left or rear side receiving the greater clear­ance is optional.

c. Overhead, 60 in. to ensure proper condenser fan

operation.

d. Between units, control box side, 42 in. per NEC (National

Electrical Code).

e. Between unit and ungrounded surfaces, control box side,

36 in. per NEC.

f. Between unit and block or concrete walls and other

grounded surfaces, control box side, 42 in. per NEC.

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

Slab-mounted units sho uld be a t least 4 in. abo ve the hig hest
expected water level (flood and runoff). Do not use the unit if
it has been under water.

II. RIG AND PLACE UNIT

Inspect unit for transportation damage. File any claim with
transportation agency. Keep unit upright and do not drop.
Spreader bars are not required if top crating is left on unit.
Rollers may be used to move unit across a roof. Level by

using unit frame as a reference. See Table 1 and Fig. 3
for additional information. Operating weight is shown in
Table 1.

These units are d esigned for o verhead rigg ing only. Rig with
packaging assembly and wood bumper strips in place to pre­vent unit damage by rigging cab le. As further protection for
coil faces, plywood sheets may be placed against sides of
unit, behind cables. Run cables to a central suspension point
so that angle from the horizontal is not less than 45 degrees.
Raise and set unit down carefully.

If it is necessary to roll unit into position, mount unit on lon­gitudinal rails, using a minimum of 3 rollers. Apply force to
rails, not unit. If unit is to be skidded into position, place it
on a large pad and drag it by the pad. Do not apply any force

to unit.

Raise from above to lift unit from rails or pad when unit is in
final position.

Lifting holes are provided in base rails as shown in Fig. 3.
Refer to rigging instructions on unit.

IMPORTANT: If unit has forklift protection skids, be sure to
remove forklift protection skids from under unit before set­ting unit in place.

After unit is in position, remove shipping materials and rig­ging skids.

III. COMPRESSOR MOUNTING

Semi-hermetic compressors are shipped from the factory
held down by 4 bolts. After unit is installed, loosen each bolt
until the snubber washer can be moved with finger pressure
(576B units only). See Fig. 4.

IV. UNIT REFRIGERANT PIPING CONNECTIONS

Suction connections and liquid connection are sweat fittings.
Refer to Table 2 for refrigerant piping sizes. Follow standard
piping practices.

A. Size Refrigerant Lines

Consider length of piping required between condensing unit
and evaporator, amount of liquid lift, and compressor oil
return. See Table 3 for design details and line sizing. Refer
to evaporator installation instructions for additional
information.

—2—

Table 1 — Physical Data

UNIT 569C072 569C090 569C120 576B090 576B102 576B120

NOMINAL CAPACITY (tons)

OPERATING WEIGHT (lb)

Aluminum Coils (Std)
Copper Coils (Optional)

RIGGING WEIGHT (lb)

Aluminum Coils (Std)
Copper Coils (Optional)

REFRIGERANT*

Operating Charge†

Typical (lb)

Shipping Charge (lb)

COMPRESSOR

Qty...Type

Qty Cylinders (ea)
Speed (rpm)
Oil Charge (oz) (ea)

67

340 392 426 510 564 564
386 460 503 578 632 632

390 420 445 560 614 614
436 488 522 628 682 682

11.4 13.6 16.5 14.3 16.4 16.4

2.0 2.0 2.0 2.0 2.0 2.0

Reciprocating,

Hermetic

1...H26A72Q 1...ZR94KC 1...ZR125KC 1...06DA818 1...06DA824

2 NANA466

3500 3500 3500 1750 1750 1750

65 85 110 88 128 128

CONDENSER AIR FAN

Qty...Rpm
Diameter (in.)

Motor Hp (NEMA)
Watt s

Nominal Cfm Total

1...850 1...1100 1...1100 1...1100 1...1100 1...1100
26 26 26 26 26 26

1

/

3

444 976 960 930 930 930

3800 6500 7000 6500 6500 6500

CONDENSER COIL

Rows...Fins/in.
Face Area (sq ft)
Storage Capacity (lb)**

CONNECTIONS (sweat)

Suction (in.)
Liquid (in.)

12.24 18.0 20.50 18.0 18.0 18.0

11.26 16.56 18.87 16.56 16.56 16.56

1

1

/

8

1

/

2

CONTROLS

Pressurestat Settings (psig)
High Cutout

Cut-in

Low Cutout

Cut-in

LEGEND

NEMA —

*Unit is factory supplied with holding charge only.

†Typical operating charge with 25 ft of interconnecting piping.

National Electrical Manufacturers Association

1

/

2

10 71/

2

81/

2

R-22

Scroll, Hermetic Reciprocating, Semi-Hermetic

Propeller; Direct Drive

3

/

4

3

/

4

3

/

4

3

/

4

Enhanced Copper Tubes, Aluminum Lanced Fins

2...17

11/

1

8

/

2

11/

5

8

/

8

320 ± 20

426 ± 7

11/

8

1

/

2

11/

8

5

/

8

7 ± 3

22 ± 5

**Storage capacity of condenser coil with coil 80% full of liquid R-22 at

124 F.

NOTE:

Unit 576B120 has one step of unloading. Full load is 100% of
capacity, and one step of unloading is 67% capacity. Unit 576B120 has
the following unloader settings: load is 70 ± 1 psig and unload is 60
± 2 psig.

10

1...06DH824
(See Note)

3

/

4

11/

8

5

/

8

—3—

DIMENSIONS (ft-in.)

UNIT A B C D E F

ELECTRICAL CONNECTIONS

With Aluminum Coils (Standard)

569C072

569C090

569C120

576B090

576B102

576B120

1

1-6

/21-23/

1-8 1-6

1

—1-21/41-45/162-95/

4

/22-913/

1-3 2-5/163-57/

16

1-9 1-8 2-0 1-3 2-

1-6 1-4

1-7 1-5 2-9

1-7 1-5 2-9

3

/42-913/

1-3 2-5/163-57/

16

13

/

1-3 2-5/163-57/

16

13

/

1-3 2-5/163-57/

16

5

/163-57/

With Copper Coils (Optional)

569C072

569C090

569C120

576B090

576B102

576B120

1-8 1-3 — 1-2

1

1-9

/

1-6 2-913/

2

16

1-10 1-7 2-0 1-3 2-

1

1-7

/21-41/22-913/

1

1-7

/

1-4 2-913/

2

1

1-7

/

1-4 2-913/

2

16

16

16

1

/41-45/162-95/

1-3 2-5/163-57/

5

/163-57/

1-3 2-5/163-57/

1-3 2-5/163-57/

1-3 2-5/163-57/

CONNECTION SIZES

3

AA

16

16

16

16

16

16

BB

CC

DD

SERVICE VALVE CONNECTIONS

UNIT SUCTION LIQUID

569C072

569C090

569C120

16

16

16

16

16

16

576B090

576B102

576B120

WEIGHT CHART (lb)

UNIT

569C072
569C090
569C120
576B090
576B102
576B120

UNIT

569C072
569C090
569C120
576B090
576B102
576B120

NOTE:

Al indicates weight with aluminum-fin coil (standard);

STD UNIT CORNER W CORNER X

Al Cu Al Cu Al Cu

340 386 86 106 53 65
392 460 91 120 84 100
426 503 96 126 99 126
510 578 114 143 89 106
564 632 133 161 97 114
564 632 133 161 97 114

CORNER Y CORNER Z

Al Cu Al Cu

77 82 124 133
105 113 113 127
117 127 113 127
133 142 173 187
141 150 193 207
141 150 193 207

Cu indicates weight with copper-fin coil (optional).

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Center of Gravity. See chart for dimensions.

3. Direction of airflow.

4. Minimum clearance (local codes or jurisdiction may prevail):
a. Bottom to combustible surfaces, 0 inches.
b. Either left or rear side of condensing unit must have 36-in. clearance for proper airflow;

the remaining side(s) must have 12-in. clearance each.
c. Overhead, 60 in., to assure proper condenser fan operation.
d. Between units, control box side, 42 in. per NEC (National Electrical Code).
e. Between unit and ungrounded surfaces, control box side, 36 in. per NEC.

f. Between unit and block or concrete walls and other grounded surfaces, control box side,

42 in. per NEC.

5. With the exception of the clearance for the condenser coil as stated in Note 4b, a removable
fence or barricade requires no clearance.

6. Units may be installed on combustible floors made from wood or Class A, B, or C roof cover­ing material.

7. Certified dimension drawings available on request.

″

Dia Field Power Supply Hole

/

1

8

2″ Dia Power Supply Knockout

1

″

Dia Power Supply Knockout

/

2

2

7

″

Dia Field Control Wiring Hole

/

8

1

″

/

1

8

1

″

/

1

8

1

″

1

/

8

1

″

/

1

8

1

″

/

1

8

1

″

1

/

8

1

″

/

2

1

″

/

2

5

″

/

8

1

″

/

2

5

″

/

8

5

″

/

8

Fig. 2 — Base Unit Dimensions

—4—

HOOK RIGGING SHACKLES THROUGH HOLES IN BA SE RAIL, ON ALL FOUR SIDES.
HOLES IN BASE RAILS ARE CENTERED AROUND THE UNIT CEN TER OF GRAVITY. USE
WOODEN TOP SKID, WHEN RIGGING, TO PREVENT RIGGING STRAPS FROM DAMAGING
UNIT.

UNIT

569C072
569C090
569C120
576B090
576B102
576B120

CAUTION:

RIGGING WEIGHT* A B C

lb kg in. mm in. mm in. mm

390 177 45.0 1143 38.5 978 35.5 904
420 192 45.0 1143 38.5 978 43.5 1105
445 203 45.0 1143 38.5 978 43.5 1105
560 255 45.0 1143 38.5 978 43.5 1105
614 280 45.0 1143 38.5 978 43.5 1105
614 280 45.0 1143 38.5 978 43.5 1105

NOTICE TO RIGGERS

ALL PANELS MUST BE IN PLACE WHEN RIGGING.

*Weights are for aluminum coils.

Fig. 3 — Rigging Label

Fig. 4 — Typical Compressor Mounting (576B Units)

B. Filter Drier and Moisture Indicator

The filter drier is factory installed. Moisture indicator is a
field-installed accessory and should be installed just after
liquid line shu toff valve at th e evaporator coil. Do not use a
receiver. A receiver is not supplied with the unit and should
not be used.

NOTE: Unit is shipped with R-22 holding charge. System
pressure must be relieved before removing caps. Recover
refrigerant prior to brazing.

Pass nitrogen or other inert gas through piping while braz­ing to prevent formation of copper oxide.

Install field-supplied thermostatic expansion valve(s) in
evaporator section. It is recommended that a field supplied
liquid line solenoid be positioned in the main liquid line
(near the evapor ator coil). It should be wired to close wh en
compressor stops to m inimize refrigerant migration during
the ‘‘OFF’’ cycle.

Table 2 — Refrigerant Piping Sizes

LINEAR LENGTH OF PIPING — FT (M)

UNIT

0-25

(0-7.6)

25-50

(7.6-15.2)

Line Size (in. OD)

50-75

(15.2-22.9)

75-100

(22.9-30.5)

LSLSLSLS

569C072

569C090

569C120

576B090

576B102

576B120

1

/211/

1

/211/

5

/811/

1

/211/

5

/811/

5

/811/

8

8

8

8

8

8

1

/211/

1

/211/

5

/813/

1

/211/

5

/811/

5

/811/

1

/

8

8

8

8

8

8

11/

2

5

/

11/

8

5

/

13/

8

5

/

11/

8

5

/

13/

8

5

/

13/

8

8

8

8

8

8

8

1

/211/

5

/813/

5

/813/

5

/813/

5

/813/

5

/813/

LEGEND

L—

Liquid Line

S—

Suction Line

NOTES:

1. Pipe sizes are based on a 2° F (1° C) loss for liquid and suction
lines.

2. Pipe sizes are based on the maximum linear length shown for
each column, plus a 50% allowance for fittings.

3. Charge units with R-22 in accordance with unit installation
instructions.

Table 3 — Liquid Line Data

MAX

UNIT

ALLOWABLE

LIQUID LIFT

Max Allowable
Pressure Drop

Ft M psi kPa F C
569C072
569C090
569C120
576B090
576B102
576B120

NOTE:

86 26.2 7 48.3 2 1
60 18.3 7 48.3 2 1
70 21.3 7 48.3 2 1
60 18.3 7 48.3 2 1
65 19.8 7 48.3 2 1
65 19.8 7 48.3 2 1

Values shown are for units operating at 45 F (7.2 C) saturated

suction and 95 F (35 C) entering air.

LIQUID LINE

Max Allowable

Temp Loss

V. ELECTRICAL CONNECTIONS

WARNING: The unit cabinet must have an

uninterrupted, unbroken electrical ground to minimize
the possibility of perso nal injury if an electrical fault
should occur. This ground may co nsist of electrical wire
connected to the unit ground lug in the control
compartment or conduit approved for electrical ground
when installed in accordance with the NEC and local
electrical codes. Failure to adhere to this warning could
result in personal injury.

CAUTION: Failure to follow these precautions

could result in damage to the unit being installed:

A. Field Power Supply (Fig. 5-7)

1. Make all electrical connections in accordance with
NEC ANSI/NFPA (American National Standards
Institute/ National Fire Protection Association) 70,
latest edition, and local electrical codes governing
such wiring. Refer to unit wiring diagram.

2. Use only copper or copper-clad conductor fa n con nec­tions between field-supplied electrical disconnect
switch and unit. DO NOT USE ALUMINUM WIRE.
Maximum wire size is no. 2 AWG (American Wire
Gage).

3. Voltage to compressor terminals during operation
must be within v ol tag e r ange indicated on unit name­plate (also see Table 4). On 3-phase units, voltages
between phases must be balanced within 2% and

8

8

8

8

8

8

—5—