Bryant 569F Unit installation

installation, start-up and
service instructions
566D/E
569D/F
576C
COMMERCIAL AIR-COOLED
CONDENSING UNITS
Sizes 072-240
6 to 20 Tons
Cancels: II 569D-72-1
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
I. Complete Pre-Installation Checks . . . . . . . . . . . . . . 1
II. Rig and Mount the Unit . . . . . . . . . . . . . . . . . . . . . . . 9
III. Complete Refrigerant Piping
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IV. Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 11
V. Complete Electrical Connections. . . . . . . . . . . . . . 11
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
I. System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
II. Leak Test and Dehydration . . . . . . . . . . . . . . . . . . . 15
III. Turn On Crankcase Heater . . . . . . . . . . . . . . . . . . . 15
IV. Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . . . . 15
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-20
I. 569D, 566E, 569F Units . . . . . . . . . . . . . . . . . . . . . . 15
II. 576C, 566D Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPERATING SEQUENCE. . . . . . . . . . . . . . . . . . . . . . . . 20, 21
I. Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
II. Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-24
I. Capacity Control (576C, 566D Units) . . . . . . . . . . . 21
II. Head Pressure Control
(566D, 566E150-240 Units Only) . . . . . . . . . . . . . 21
III. Time Guard II Circuit (566D Only). . . . . . . . . . . . . . 21
IV. Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . 22
V. Compressor Protection . . . . . . . . . . . . . . . . . . . . . . 22
VI. Low-Pressure Switches. . . . . . . . . . . . . . . . . . . . . . 22
VII. High-Pressure Switches . . . . . . . . . . . . . . . . . . . . . 22
VIII. Discharge Gas Thermostat . . . . . . . . . . . . . . . . . . . 22
IX. Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
X. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
XI. Coil Cleaning and Maintenance . . . . . . . . . . . . . . . 22
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . 25, 26
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics
should install, start-up, and service this equipment.
II 569D-72-2
9/15/04
Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be
performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers, and labels attached to
the equipment.
Follow all safety codes. Wear safety glasses and work gloves.
Keep quenching cloth and fire extinguisher nearby when
brazing. Use care in handling, rigging, and setting bulky
equipment.
WARNING: Before installing or servicing system,
always turn off main power to system and install lockout tag on disconnect. There may be more than one disconnect switch. Electrical shock can cause personal
injury.
INSTALLATION
I. COMPLETE PRE-INSTALLATION CHECKS
A. Uncrate Unit
Remove unit packaging except for the top skid assembly,
which should be left in place until after the unit is rigged
into its final location.
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete.
C. Consider System Requirements
• Consult local building codes and National Electrical Code
(NEC) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing unit. See Fig. 1-4 for unit
dimensions and weight distribution data.
• Locate unit so that outdoor coil (condenser) airflow is
unrestricted on all sides and above.
• Unit may be mounted on a level pad directly on the base
channels or mounted on a raised structural steel frame.
See Tables 1A to 1C for unit operating weights. See
Fig. 1-4 for weight distribution based on recommended
support points.
NOTE: If vibration isolators are required for a particular
installation, use the data in Fig. 1-4 to make the proper
selection.
ALUMINUM COIL lb (kg)
UNIT
569D072
569D090
569D120
576C090
576C102
576C120
Standard
Weight
300 (136)
383 (174)
430 (195)
550 (249)
575 (261)
575 (261)
COPPER COIL lb (kg)
Corner
A
Corner
B
Corner
C
Corner
D
62 (28)
86 (39)
84 (38)
49 (22)
55 (25)
55 (25)
103 (47)
123 (56)
166 (75)
262 (119)
265 (120)
265 (120)
62 (28)
85 (39)
66 (30)
75 (34)
88 (40)
88 (40)
72 (33)
89 (40)
114 (52)
165 (75)
167 (76)
167 (76)
UNIT
569D072
569D090
569D120
576C090
576C102
576C120
ALUMINUM COIL
Center of Gravity
mm [in.]
X
Y
831.9 [32.75] 641.4 [25.25]
822.3 [32.38] 635.0 [25.00]
812.8 [32.00] 676.3 [26.63]
924.1 [36.38] 657.3 [25.88]
927.1 [36.50] 647.7 [25.50]
927.1 [36.50] 647.7 [25.50]
Standard
Weight
352 (160)
484 (220)
531 (241)
651 (295)
676 (307)
676 (307)
Corner
A
Corner
B
Corner
C
Corner
D
95 (43)
122 (55)
121 (55)
88 (40)
94 (43)
94 (43)
92 (42)
137 (62)
176 (81)
273 (124)
276 (125)
276 (125)
92 (42)
122 (55)
103 (47)
114 (52)
127 (58)
127 (58)
72 (33)
104 (47)
128 (58)
177 (80)
179 (81)
179 (81)
COPPER COIL
Center of Gravity
mm [in.]
X
Y
789.7 [31.09] 619.3 [24.38]
806.5 [31.75] 621.8 [24.48]
800.1 [31.50] 656.3 [25.84]
896.4 [35.29] 644.1 [25.36]
900.2 [35.44] 636.3 [25.05]
900.2 [35.44] 636.3 [25.05]
Fig. 1 — 569D072-120, 576C090-120 Unit Dimensions
—2 —
COMPRESSOR # 1
OUTDOOR COIL
CORNER A
CORNER B
COMPRESSOR # 2
1162.7
[45.78]
Y
OUTDOOR COIL
CORNER C
X
CORNER D
ACCESS PANEL
ELECTRICAL DISCONNECT
TOP VIEW
LOCATION
CIRCUIT #2
LIQUID CONNECTION (3/8")
CONTROL BOX
ACCESS PANEL
O 34.5 [1.36]
POWER ENTRY
WITH 50.0/58.0/65. K.O.
CONVENIENCE
OUTLET LOCATION
OUTDOOR
COIL
OUTDOOR
COIL
582.5
[22.93]
OUTDOOR
COIL
637.9
644.6 [25.11]
[25.38]
111.7
116.7
FORK TRUCK SLOTS [4.40]
[4.59]
(3 SIDES ONLY)
O 22.2 [0.87] FIELD
ENTRY SERVICE PORT
ACCESS
PANEL
872.8
[34.36]
CIRCUIT #1
LIQUID CONNECTION
(3/8")
BOTTOM
OF UNIT
167.5
[6.59]
CIRCUIT #2
SUCTION
CONNECTION (1 1/8")
CIRCUIT #1
SUCTION
CONNECTION (1 1/8")
RIGHT SIDE VIEW
1509.3
[59.42]
FRONT VIEW
LEFT SIDE VIEW
COMPRESSOR
ACCESS PANEL
OUTDOOR
COIL
#2
#1
SERVICE VALVE CONNECTIONS
UNIT
SUCTION 3/8
LIQUID
1-1/8
569F120
3/ (2)
569F120
11/8 (2)
8
REAR VIEW
ALUMINUM COIL
Std.
Unit
Wt.
UNIT
569F120
Corner
A
Corner
B
Corner
C
COPPER COIL
Corner
D
Center of Gravity
mm [in.]
X
873.8
[34.4]
lb
kg
lb
kg
lb
kg
lb
kg
lb
kg
488
221
102
46
143
65
139
63
104
47
Y
591.8
[23.3]
Std.
Unit
Wt.
Corner
A
Corner
C
Corner
D
Center of Gravity
mm [in.]
X
845.8
[33.3]
lb
kg
lb
kg
lb
kg
lb
kg
lb
kg
589
267
129
59
166
75
164
74
130
59
Fig. 2 — 569F120 Unit Dimensions
—3—
Corner
B
Y
579.1
[22.8]
UNIT
566D
150
180
240
Standard
Weight
lb (kg)
779 (354)
789 (359)
900 (422)
ALUMINUM COIL
Operational Weight Points lb (kg)
A
B
C
D
E
F
70 (32)
70 (32)
84 (38)
177 (80)
180 (82)
234 (106)
68 (31)
69 (31)
82 (37)
100 (45)
101 (46)
108 (49)
261 (119)
265 (120)
310 (141)
103 (47)
104 (47)
111 (50)
Standard
Weight
lb (kg)
919 (418)
929 (422)
1040 (473)
NOTES:
1. Service clearances are as follows:
Side (compressor) — 31/2 ft (1067 mm)
Side (opposite compressor) — 3 ft (914 mm)
Ends — 2 ft (610 mm)
Top — 5 ft (1524 mm)
COPPER COIL
Operational Weight Points lb (kg)
A
B
C
D
E
F
99 (45)
99 (45)
110 (50)
224 (102)
228 (104)
283 (129)
96 (44)
96 (44)
107 (49)
114 (52)
115 (52)
116 (53)
268 (122)
273 (124)
305 (139)
118 (54)
118 (54)
119 (54)
2. Corner weights are approximate.
3. Actual support weights depend on level of unit and evenness of support
posts.
4. Total weights represent approximate unit weights without shipping package.
5. Bottom or top skid is NOT included in the weights.
Fig. 3 — 566D150-240 Unit Dimensions
—4 —
B
C
A
E
F
D
#1
UNIT
566E
150
180
240
Standard
Weight
lb (kg)
676 (307)
740 (336)
764 (347)
#2
ALUMINUM COIL
Operational Weight Points lb (kg)
A
B
C
D
E
F
84 (38)
86 (39)
87 (40)
168 (76)
186 (85)
192 (87)
72 (33)
71 (32)
72 (33)
78 (35)
82 (37)
85 (39)
183 (83)
216 (98)
226 (103)
91 (41)
99 (45)
102 (46)
Standard
Weight
lb (kg)
822 (373)
886 (403)
904 (411)
COPPER COIL
Operational Weight Points lb (kg)
A
B
C
D
E
F
118 (54)
119 (54)
120 (55)
219 (100)
238 (129)
243 (110)
103 (47)
102 (46)
102 (46)
90 (41)
95 (43)
96 (44)
190 (86)
221 (100)
230 (105)
102 (46)
111 (50)
113 (51)
3. Actual support weights depend on level of unit and evenness of support
posts.
4. Total weights represent approximate unit weights without shipping
package.
5. Bottom or top skid is NOT included in the weights.
NOTES:
1. Service clearances are as follows:
Side (compressor) — 31/2 ft (1067 mm)
Side (opposite compressor) — 3 ft (914 mm)
Ends — 2 ft (610 mm)
Top — 5 ft (1524 mm)
2. Corner weights are approximate.
Fig. 4 — 566E150-240 Unit Dimensions
—5—
Table 1A — Physical Data — 569D072-120, 576C090-120, 569F120 Units
UNIT SIZE
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Aluminum-Fin Coils (Standard)
Copper-Fin Coils (Optional)
REFRIGERANT TYPE*
Operating Charge, Typical (lb)†
Shipping Charge (lb)
COMPRESSOR
Qty...Model
Oil Charge (oz)
No. Cylinders
Speed (rpm)
CONDENSER FANS
Qty...Rpm
Motor Hp
Diameter
Nominal Airflow (Cfm Total)
Watts (Total)
CONDENSER COIL (Qty)
Face Area (sq ft total)
Rows...Fins/in.
Storage Capacity (lb)**
CONTROLS
Pressurestat Settings (psig)
High Cutout
Cut-in
Low Cutout
Cut-in
DISCHARGE GAS THERMOSTAT (F)
Cutout
Cut-in
PRESSURE RELIEF
Location
Temperature (F)
PIPING CONNECTIONS (in. ODM)
Qty...Suction
Qty...Liquid
569D072
6
569D090
71 / 2
569D120
10
300
352
383
484
430
531
12
20
22
1...SR_68
88
2...850
1/
8
22
5400
340
1...17
17.3
Scroll
1...SR_94
90
N/A
3500
576C090
71/2
550
651
R-22
20
2.0
1...ZR125
110
1...06DA818
88
4
2...1100
1/4
2...1100
2...1100
1/4
22
6500
570
2
29.2
2...17
34.2
2...17
34.2
428 ± 10
320 ± 20
27 ± 3
44 ± 5
—
—
576C102
81 / 2
576C120
10
569F120
10
575
676
575
676
488
589
24
24
11/Circuit
Reciprocating
1...06DA824
128
6
1750
1...06DH824
128
6
Scroll
2...SR_60
72 (ea)
N/A
3500
2...1100
1/4
22
6500
570
2
29.2
2...17
34.2
2...1100
428 ± 10
320 ± 20
27 ± 3
44 ± 5
270 ± 9
190 ± 13
—
—
—
—
2...1100
1/4
22
6500
570
2
29.2
2...17
17.1 (ea)
428 ± 10
320 ± 20
27 ± 3
44 ± 5
—
—
—
—
—
—
1...13/8
1...1/2
1...13/8
1...1/2
2...11/8
2...3/8
Suction Line
200
1...11/8
1...3/8
1...11/8
1...3/8
1...13/8
1...1/2
*Unit is factory-supplied with holding charge only.
†Typical operating charge with 25 ft of interconnecting piping.
**Storage capacity of condenser coil with coil 80% full of liquid R-22 at
95 F.
1...11/8
1...3/8
NOTE: Unit 576C120 has one step of unloading. Full load is at 100% of
capacity, and one step of unloading is 67% capacity. Unit 576C120 has
the following unloader settings: load is 70 ± 1 psig and unload is 60 ±
2 psig.
—6 —
Table 1B — Physical Data — 566D150-240 Units
UNIT SIZE
NOMINAL CAPACITY (tons)
OPERATING WEIGHTS (lb)
Aluminum-Fin Coil (Standard)
Copper-Fin Coil (Optional)
REFRIGERANT TYPE*
Operating Charge, Typical (lb)†
Shipping Charge (lb)
COMPRESSOR
Qty...Model
No. Cylinders
Speed (rpm)
Oil Charge (pt)
Capacity Steps
Accessory
Standard
Unloader Setting (psig)
Load
Unload
Crankcase Heater Watts
CONDENSER FANS
Qty...Rpm
Diameter (in.)
Nominal Hp
Nominal Airflow (cfm, total)
Watts (total)
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft)
Storage Capacity (lb)††
CONTROLS
Pressurestat (psig)
High Cutout
Cut-in
Low Cutout
Cut-in
FAN CYCLING CONTROLS
Operating Pressure (psig)
No. 2 Fan, Close
Open
PRESSURE RELIEF
Location
Temperature (F)
PIPING CONNECTIONS (in. ODM)
Suction
Liquid
Hot Gas Stub
566D150
121/2
566D180
15
566D240
20
779
919
900
1040
10
789
929
R-22
23
3.1
Reciprocating, Semi-Hermetic
1...06DD537
6
1750
10
33**, 66, 100
66, 100
33**, 66, 100
66, 100
—
50, 100
3...15
29.2
40.3
70 ± 1
60 ± 2
125
Axial Flow, Direct Drive
2...1075
26
1/
2
11,000
1460
Copper Tubes, Aluminum Fins
3...15
29.2
39.8
3...15
29.2
39.8
23
3.1
1...06DD328
6
28
3.1
1...06E4250
4
15.5
395 ± 10
295 ± 20
27 ± 4
67 ± 7
255 ± 10
160 ± 10
Liquid Line
200
13 / 8
13/8
5/
8
3/
8
15/8
*Unit is factory-supplied with holding charge only.
†Typical operating charge with 25 ft of interconnecting piping. Operating charge is approximate for maximum system capacity.
**Indicates capacity step (%) with electric unloader accessory.
††Storage capacity is measured at liquid saturated temperatures of 123 F for 566D150 and 130 F for 566D180 and 240.
—7—
Table 1C — Physical Data — 566E150-240 Units
UNIT SIZE
NOMINAL CAPACITY (tons)
OPERATING WEIGHTS (lb)
Aluminum-Fin Coil (Standard)
Copper-Fin Coil (Optional)
REFRIGERANT TYPE*
Operating Charge, Typical (lb)†
Shipping Charge (lb)
COMPRESSOR
Qty...Model
Speed (rpm)
Oil Charge (oz)
Crankcase Heater Watts
CONDENSER FANS
Qty...Rpm
Diameter (in.)
Nominal Hp
Nominal Airflow (cfm, total)
Watts (total)
CONDENSER COIL
Rows...Fins/in.
Face Area (sq ft total)
Storage Capacity (lb)**
CONTROLS
Pressurestat (psig)
High Cutout
Cut-in
Low Cutout
Cut-in
FAN CYCLING CONTROLS
Operating Pressure (psig)
No. 2 Fan, Close
Open
PRESSURE RELIEF
Location
Temperature (F)
PIPING CONNECTIONS (in. ODM)
Suction
Liquid
Hot Gas Stub
566E150
121/2
566E180
15
566E240
20
676
822
740
886
R-22
11.5/Circuit
3.1
Scroll
2...ZR94
3500
85 (ea)
70
764
904
11.5/Circuit
2...ZR72
3500
60 (ea)
14/Circuit
2...ZR125
3500
110 (ea)
2...1075
26
1/
2
11,000
1460
3...15
29.2
48
426 ± 7
320 ± 20
27 ± 4
67 ± 7
255 ± 10
160 ± 10
Liquid Line
200
(2) 13/8
(2) 1/2
3/
8
*Unit is factory-supplied with holding charge only.
†Typical operating charge with 25 ft of interconnecting piping. Operating charge is approximate for maximum system capacity.
**Storage capacity is measured at liquid saturated temperatures of 123 F for 566E150 and 130 F for
566E180 and 240.
—8 —
II. RIG AND MOUNT THE UNIT
CAUTION: Be sure unit panels are securely in
place prior to rigging.
A. Rigging
These units are designed for overhead rigging. Refer to rigging label for preferred rigging method. Spreader bars are
not required if top crating is left on unit. All panels must be
in place when rigging. 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 the unit into position, mount the unit
on longitudinal rails, using a minimum of 3 rollers. Apply
force to the rails, not the unit. If the 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 the unit.
LEGEND
A — Suction Riser Without Trap
B — Suction Riser With Trap
C — Suction Line to Condensing Unit
D — Short Vertical Riser into Condensing Unit:
566D150,180
566D240
Raise from above to lift unit from the rails or pad when unit
is in final position.
After unit in position, remove all shipping materials and top
crating.
B. Compressor Mounting
As shipped, the compressor is held tightly in place by selflocking bolts. Before starting unit, loosen self-locking
bolts until the snubber washer can be moved sideways with finger pressure. Do not remove shipping
bolts. See Fig. 5.
Fig. 6 — Suction Line Piping
Note that refrigerant suction piping should be insulated.
Table 2A — Liquid Line Data —
566D150-240 Units
III. COMPLETE REFRIGERANT PIPING CONNECTIONS
IMPORTANT: DO NOT bury refrigerant piping underground.
IMPORTANT: A refrigerant receiver is not provided with the
unit. Do not install a receiver.
A. Size Refrigerant Lines
Consider the length of piping required between outdoor unit
and indoor unit (evaporator), the amount of liquid lift, and
compressor oil return. See Tables 2A-4. Refer to indoor unit
installation instructions for additional information.
UNIT
566D
MAXIMUM
ALLOWABLE
LIQUID LIFT
ft (m)
150
180
240
67 (20.4)
82 (25.0)
87 (26.5)
Maximum
Allowable
Pressure
Drop
psig (kPa)
7 (48.3)
LIQUID LINE
Maximum
Filter Drier
Allowable
and
Temp.
Sight Glass
Loss
Flare Conn.*
F (C)
in.
2 (1.1)
5/
8
Table 2B — Liquid Line Data —
566E150-240 Units
IMPORTANT: Use the piping data in Tables 2A-4 as a
general guide only. For 569D, 576C, 569F applications with
liquid lift greater than 20 ft, use 5/8-in. liquid line. Maximum
lift is 60 ft.
Condensing units with multiple-step unloading may require
double suction risers to assure proper oil return at minimum
load operating condition. See Tables 3A-4 and Fig. 6. Reduction of evaporator coil surface should be analyzed to provide
sufficient refrigerant velocity to return oil to the compressor.
Liquid line solenoid valves may be used in certain situations
to accomplish this. Hot gas bypass, if used, should be introduced before the evaporator.
— 13/8 in. OD
— 15/8 in. OD
UNIT
566E
MAXIMUM
ALLOWABLE
LIQUID LIFT
ft (m)
150
180
240
60 (18)
LIQUID LINE
Maximum
Maximum
Allowable
Allowable
Pressure
Temp.
Drop
Loss
psig (kPa)
F (C)
7 (48)
2 (1)
*Inlet and outlet.
NOTE: Data shown is for units operating at 45 F (7.2 C) saturated suction and 95 F (35 C) entering air.
Fig. 5 — Compressor Mounting
—9—
Table 3A — Refrigerant Piping Sizes —
569D, 576C, 569F Units
Table 4 — Refrigerant Piping Sizes, Double Suction
Risers — 566D150, 180 Units
072
569D 090
120
LINEAR LENGTH OF INTERCONNECTING PIPING —
FT (m)
0-25
26-50
51-75
76-100*
(0-7.5)
(7.8-15)
(15.3-23)
(23.3-30)
Line Size (in. OD)
L
S
L
S
L
S
L
S
3/
3/
3/
3/
1 1/ 8
1 1/ 8
11/8
11/8
8
8
8
8
3/
3/
3/
3/
1 1/ 8
1 1/ 8
11/8
11/8
8
8
8
8
1/
1/
1/
1/
1 3/ 8
1 3/ 8
13/8
13/8
2
2
2
2
576C 120
1/ 2
UNIT
1 3/ 8
1/ 2
1 3/ 8
1/2
13/8
1/2
UNIT
566D
150
180
LENGTH OF INTERCONNECTING PIPING, FT (M)
50-75
76-100
(15-23)
(23.3-30)
Line Size (in. OD)
A
B
C
A
B
C
13/8
1 5/ 8
1 1/ 8
13/8
15/8
11/8
—
—
—
1 3/ 8
15/8
21/8
NOTES:
1. See Fig. 5 for “A,” “B,” and “C” dimensions.
2. No double suction risers are needed for unit size 240.
13/8
569F 120 (2) 3/8 (2) 11/8 (2) 3/8 (2) 11/8 (2) 3/8 (2) 11/8 (2) 3/8 (2) 11/8
LEGEND
L — Liquid Line
S — Suction Line
*Field-supplied suction accumulator required.
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 3B — Refrigerant Piping Sizes —
566D Units
UNIT
150
180
240
566D
LENGTH OF INTERCONNECTING PIPING, FT (M)
0-15
16-25
26-50
51-75
76-100*
(0-4.5)
(4.8-7.5)
(7.8-15)
(15.3-23)
(23.3-30)
Line Size (in. OD)
L
S
L
S
L
S
L
S
L
S
1/
5/
11/8 1/2 13/8 5/8 13/8 5/8 15/8†
1 5/ 8†
2
8
7/ 8
1/ 2
13/8 5/8 13/8 5/8 15/8 7/8 15/8
2 1/ 8†
5/
7/
15/8 5/8 15/8 7/8 15/8 7/8 21/8
2 1/ 8
8
8
LEGEND
L — Liquid
S — Suction
Close-coupled
*Field-supplied suction accumulator required.
†Requires a double suction riser if 2 unloaders are used and the evaporator is
below the condensing unit. See Table 4 and Fig. 6 for more information.
B. Install Filter Drier(s) and Moisture Indicator(s)
Every unit should have a filter drier and liquid-moisture
indicator (sight glass). Refer to Table 5. In some applications,
depending on space and convenience requirements, it may be
desirable to install 2 filter driers and sight glasses. One filter
drier and sight glass may be installed at A locations in Fig. 7,
or, 2 filter driers and sight glasses may be installed at B
locations.
Select the filter drier for maximum unit capacity and minimum pressure drop. Complete the refrigerant piping from
indoor unit to outdoor unit before opening the liquid and
suction lines at the outdoor unit.
C. Install Liquid Line Solenoid Valve — Solenoid Drop
It is recommended that a solenoid valve be placed in the
main liquid line (see Fig. 7) between condensing unit and fan
coil. Refer to Table 5. (A liquid line solenoid valve is required
when the liquid line length exceeds 75 ft.) This valve
prevents refrigerant migration (which causes oil dilution) to
the compressor during the off cycle at low outdoor ambient
temperatures. The solenoid should be wired in parallel with
the compressor contactor coil. This means of electrical
control is referred to as solenoid drop control.
NOTES:
1. Pipe sizes are based on a 2 F (1.1 C) loss for liquid lines and a 1.5 F
(0.8 C) loss for suction lines.
2. Pipe sizes are based on an equivalent length equal to the maximum
length of interconnecting piping plus 50% for fittings. A more accurate
estimate may result in smaller sizes.
3. For applications with refrigerant line lengths greater than 100 ft, contact
Bryant representative.
Table 3C — Refrigerant Piping Sizes —
566E Units
UNIT
150
LINEAR LENGTH OF INTERCONNECTING PIPING
FT (M)
0-25
26-50
51-75
76-100*
(0-7.5)
(7.8-15)
(15.3-23)
(23.3-30)
Line Size (in. OD)
L
S
L
S
L
S
L
S
1/
1/
1/
1/
11/8
11/8
1 1/ 8
13/8
2
2
2
2
566E 180
1/
2
13/8
1/
2
13/8
1/
2
1 3/ 8
5/
8
13/8
240
1/
2
13/8
1/
2
13/8
5/
8
1 3/ 8
5/
8
13/8
LEGEND
TXV — Thermostatic Expansion Valve
LEGEND
L — Liquid
S — Suction
Fig. 7 — Location of Sight Glass(es)
and Filter Driers
*Field-supplied suction accumulator required.
NOTES:
1. Pipe sizes are based on a 2 F (1.1 C) loss for liquid lines and a 1.5 F
(0.8 C) loss for suction lines.
2. Pipe sizes are based on an equivalent length equal to the maximum
length of interconnecting piping plus 50% for fittings. A more accurate
estimate may result in smaller sizes.
3. For applications with refrigerant line lengths greater than 100 ft, contact
Bryant representative.
—10—
Table 5 — Refrigerant Specialities Part Numbers
UNIT
569D072
569D090
569D120
576C120
566D150
566D180
566D240
569F120
566E150
566E180
566E240
LIQUID LINE
SIZE (in.)
3/
8
3/
8
1/2
1/
2
1/
2
1/2
5/
8
1/
2
5/8
7/
8
5/
8
7/8
3/
8
1/
2
1/2
5/
8
1/
2
5/8
LIQUID LINE
SOLENOID VALVE (LLSV)
200RB5T3M
200RB5T3M
200RB5T4M
200RB6T4M
200RB6T4M
200RB7T4M
200RA8T5M
200RB7T4M
240RA8T5M
200RA8T7M
200RA9T5M
200RA9T7M
200RB5T3M Qty 2
200RB5T4M Qty 2
200RB5T4M Qty 2
200RB5T5M Qty 2
200RB6T4M Qty 2
200RB6T5M Qty 2
LLSV
COIL
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V
AMG/24V Qty 2
AMG/24V Qty 2
AMG/24V Qty 2
AMG/24V Qty 2
AMG/24V Qty 2
AMG/24V Qty 2
SIGHT
GLASS
AMI-1TT3
AMI-1TT3
AMI-1TT4
AMI-1TT4
AMI-1TT4
AMI-1TT4
AMI-1TT5
AMI-1TT4
AMI-1TT5
AMI-1TT7
AMI-1TT5
AMI-1TT7
AMI-1TT3 Qty 2
AMI-1TT4 Qty 2
AMI-1TT4 Qty 2
AMI-1TT5 Qty 2
AMI-1TT5 Qty 2
AMI-1TT5 Qty 2
FILTER
DRIER
P502-8304S*
P502-8304S*
P502-8304S
P502-8307S*
P502-8307S*
P502-8757S*
P502-8757S*
P502-8757S*
P502-8757S*
P502-8757S
P502-8757S*
P502-8757S
P502-8304S* Qty 2
P502-8304S Qty 2
P502-8304S Qty 2
P502-8305S Qty 2
P502-8307S*
P502-8307S*
SUCTION LINE
ACCUMULATOR
S-7063S*
S-7063S*
S-7063S*
S-7063
S-7063
S-7063
S-7063
S-7721
S-7721
S-7721
S-7721
S-7721
S-7061 Qty 2
S-7063S* Qty 2
S-7063S Qty 2
S-7063S Qty 2
S-7063S Qty 2
S-7063S Qty 2
*Bushings required.
D. Install Liquid Line Solenoid Valve (Optional) — Capacity
Control
If 2-step cooling is desired, place a solenoid valve in the location shown in Fig. 7.
IV. INSTALL ACCESSORIES
E. Make Piping Connections
Do not remove runaround loop from suction and liquid line
stubs in the compressor compartment until piping connections are ready to be made. Pass nitrogen or other inert gas
through piping while brazing to prevent formation of copper
oxide.
V. COMPLETE ELECTRICAL CONNECTIONS
WARNING: Recover holding
removal of runaround piping loop.
charge
prior
to
Field install accessories such as low-ambient control before
proceeding with wiring. Refer to the instructions shipped
with the accessory.
A. Power Wiring
Unit is factory wired for voltage shown on nameplate. Provide adequate fused disconnect switch within sight from unit
and readily accessible from unit, but out of the reach of children. Lock switch open (off) to prevent power from being
turned on while unit is being serviced. Disconnect switch,
fuses, and field wiring must comply with national and local
code requirements. See Tables 6A-6C.
Route power wires through opening in unit end panel to connection in unit control box as shown on unit label diagram
and in Fig. 9. Unit must be grounded.
Affix crankcase heater warning sticker to unit disconnect
switch.
1. Open service valves:
a. Discharge service valve on compressor.
b. Suction service valve on compressor.
c. Liquid line valve.
2. Remove 1/4-in. flare cap from liquid valve Schrader
port.
3. Attach refrigerant recovery device and recover holding charge.
4. Remove runaround loop.
5. Install a field-supplied liquid moisture indicator in
the piping immediately leaving outdoor unit.
6. If necessary, install field-supplied thermostatic
expansion valve(s) (TXVs) in air handler.
If 2 TXVs are installed and two-step cooling is desired,
install field-supplied capacity control liquid line solenoid
valve ahead of the upper TXV (see Fig. 7).
B. Control Circuit Wiring
Control voltage is 24 v. See Fig. 10 and unit label diagram for
field-supplied wiring details. Route control wires through
opening in unit end panel to connection in unit control box.
C. Control Transformer Wiring (569D, 576C, 569F Units
Only)
On multivoltage units, check the transformer primary wiring connections. See Fig. 11 or refer to unit label diagram.
If unit will be operating at 208-3-60 power, remove black
wire (BLK) from the transformer primary connection
labelled “230” and move it to the connection labelled “208”.
See Fig. 11.
F. Provide Safety Relief
A fusible plug is located on the compressor crankcase or in
the liquid line (Fig. 8). Do not cap this plug. If local code
requires additional safety devices, install them as directed.
—11—
LLSV1
TERMINAL BOARD TB2
IN CONTROL BOX
C
TIME GUARD CIRCUIT
1
ACCESSORY
THERMOSTAT
2
3
4
5
6
8
7
9
JUMPER
RH
RC
NOTES:
1. 566D240 has a fusible plug in the liquid line.
2. 569D120, 576C120 and 569F120 units have a fusible joint in the
liquid line.
G
Y1
Fig. 8 — Location of Fusible Plug (566D)
Y2
IFC
NOTE 1
LLSV2
W1
R1
NOTE 2
W2
R2
R1
L1
HD1
L2
HD2
R2
LEGEND
Compressor Contactor
Heating Device
Indoor-Fan Contactor
Liquid Line Solenoid Valve 1 — Refrigerant Migration
Control
LLSV2 — Liquid Line Solenoid Valve 2 — Capacity Control
R
— Relay
Factory Wiring
Field Wiring
C
HD
IFC
LLSV1
—
—
—
—
NOTES:
1. Combination LLSV plus IFC va should not exceed 30 va.
2. Do not exceed 5 va (24 vac) per coil.
3. If va values shown in Notes 1 and 2 must be exceeded, use
accessory relay transformer package 38AE900001 (60 Hz).
Fig. 10 — Typical Remote Thermostat Wiring
(566D Unit Shown)
LEGEND
EQUIP GND — Equipment Ground
NEC
— National Electrical Code
Factory Wiring
Field Wiring
NOTE: Terminal block (TB1) is used for 566E150-240 and 566D150240 units. Pigtails are provided on 569D, 576C, 569F units.
Fig. 9 — Main Power Supply Wiring
(566D Unit Shown)
Fig. 11 — Control Transformer Wiring
(569D, 576C, 569F Unit Shown)
—12—
Table 6A — Electrical Data — 569D072-120, 576C090-120, 569F120 Units
FACTORY
INSTALLED
OPTION
UNIT
SIZE
072
090
569D
120
090
576C
102
120
569F
FLA
LRA
MCA
MOCP
NEC
RLA
120
—
—
—
—
—
—
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
NONE OR DISCONNECT
CONVENIENCE OUTLET
LEGEND
Full Load Amps
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Rated Load Amps
NOMINAL
VOLTAGE
V-Ph-Hz
VOLTAGE
RANGE*
Min
Max
COMPRESSOR
RLA
LRA
FAN MOTORS
(Qty 2)
FLA (ea)
LRA (ea)
208/230-3-60
187
254
19.2
146
0.9
1.6
460-3-60
418
506
9.6
73
0.4
0.9
575-3-60
523
632
7.7
58.4
0.4
0.9
208/230-3-60
187
254
25.6
190
1.5
3.1
460-3-60
418
506
12.8
95
0.7
1.9
575-3-60
523
632
10.2
76
0.7
1.9
208/230-3-60
187
254
37.8
239
1.5
3.1
460-3-60
418
506
17.2
125
0.7
1.9
575-3-60
523
632
13.4
80
0.7
1.9
208/230-3-60
187
254
28.2
160
1.5
3.1
460-3-60
418
506
14.1
80
0.7
1.9
575-3-60
523
632
11.3
64
0.7
1.9
208/230-3-60
187
254
36
198
1.5
3.1
460-3-60
418
506
18
99
0.7
1.9
575-3-60
523
632
14
79
0.7
1.9
208/230-3-60
187
254
36
198
1.5
3.1
460-3-60
418
506
18
99
0.7
1.9
575-3-60
523
632
14
79
0.7
1.9
208/230-3-60
187
254
16
125
1.5
3.1
460-3-60
418
506
8
66.5
0.7
1.9
575-3-60
523
632
6.4
50
0.7
1.9
POWER
SUPPLY
MCA
MOCP
25.8
35
30.6
35
12.8
20
15.0
20
10.2
15
12.0
15
35.0
60
39.8
60
17.4
30
19.6
30
13.8
20
15.5
20
50.3
60
55.1
70
22.9
30
25.1
30
17.8
25
19.5
25
38.3
60
43.1
60
19.0
25
21.2
25
15.2
20
16.9
20
48.0
60
52.8
70
23.9
35
26.1
35
18.6
30
20.3
30
48.0
60
52.8
70
23.9
35
26.1
35
18.6
30
20.3
30
39.0
55
43.8
55
19.4
25
21.6
25
15.8
20
17.5
20
*Units are suitable for use on electrical systems where voltage supplied
to the unit terminals is not below or above the listed limits.
NOTES:
1. The MCA and MOCP values are calculated in accordance with the
NEC, Article 440.
2. Motor RLA and LRA values are established in accordance with
Underwriters’ Laboratories (UL), Standard 1995.
3. The 575-v units are UL, Canada-listed only.
4. Convenience outlet is available as either a factory-installed option or
a field-installed accessory and is 115-v, 1 ph, 60 Hz.
—13—
Table 6B — Electrical Data — 566D150-240 Units
NOMINAL
VOLTAGE
(3-Ph, 60 Hz)
UNIT
150
566D
180
240
208/230
460
575
208/230
460
575
208/230
460
575
VOLTAGE
RANGE*
Min
187
414
518
187
414
518
187
414
518
Max
253
528
660
253
528
660
254
508
632
COMPRESSOR
RLA
LRA
49.3
22.1
17.9
63.6
29.3
23.8
67.9
34.7
28.8
191
80
69
266
120
96
345
173
120
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and
Refrigeration
ICF
— Maximum Instantaneous Current Flow
During Start-Up (LRA of compressor
plus total FLA of fan motors)
kW
— Total Fan Motor Input (kilowatts)
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps per NEC,
Section 430-24
MOCP — Maximum Overcurrent Protection (amps)
RLA — Rated Load Amps (compressor)
FAN MOTORS (Qty 2)
FLA (ea)
Fan No.
kW
1
2
4.3
3.7
2.3
1.9
1.41
1.8
1.8
4.3
3.7
2.3
1.9
1.41
1.8
1.8
4.3
3.7
2.3
1.9
1.41
1.8
1.8
POWER SUPPLY
MCA
MOCP†
ICF
69.6
31.7
25.6
87.5
40.7
33.0
93.4
48.1
40.1
100
50
40
125
60
50
150
80
60
199
84
73
274
124
100
353
177
124
*Units are suitable for use on electrical systems where voltage supplied to the unit terminals is not below or above the listed limits.
†Fuse or HACR circuit breaker.
NOTES:
1. The MCA and MOCP values are calculated in accordance with the
National Electrical Code (NEC), Article 440.
2. Motor RLA and LRA values are established in accordance with
Underwriters’ Laboratories (UL), Standard 1995.
3. The 575-v units are UL, Canada-listed only.
Table 6C — Electrical Data — 566E150-240 Units
UNIT
FACTORYINSTALLED
OPTION
NONE OR DISCONNECT
CONVENIENCE OUTLET
NOMINAL VOLTAGE COMPRESSOR 1 COMPRESSOR 2
VOLTAGE RANGE*
(3 Ph, 60 Hz)
Min Max
RLA
LRA
RLA
LRA
208/230
187 253
20.7
156
20.7
156
NONE OR DISCONNECT
150 CONVENIENCE OUTLET
460
414 528
10.0
75
10.0
75
NONE OR DISCONNECT
CONVENIENCE OUTLET
575
518 660
8.2
54
8.2
54
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230
187 253
32.1
195
32.1
195
NONE OR DISCONNECT
566E 180 CONVENIENCE OUTLET
460
414 528
16.4
95
16.4
95
NONE OR DISCONNECT
CONVENIENCE OUTLET
575
518 660
12.0
80
12.0
80
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230
187 253
37.8
239
37.8
239
NONE OR DISCONNECT
240 CONVENIENCE OUTLET
460
414 528
19.2
125
19.2
125
NONE OR DISCONNECT
CONVENIENCE OUTLET
575
518 660
13.8
80
13.8
80
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and
Refrigeration
ICF
— Maximum Instantaneous Current Flow
During Start-Up (LRA of compressor
plus total FLA of fan motors)
kW
— Total Fan Motor Input (kilowatts)
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps per NEC,
Section 430-24
MOCP — Maximum Overcurrent Protection (amps)
RLA — Rated Load Amps (compressor)
FAN MOTORS (Qty 2)
POWER
FLA (ea)
SUPPLY
Fan No.
kW
1
2
MCA MOCP†
55.6
70
4.3
3.7
1.41
63.5
80
27.7
35
2.3
1.9
1.41
31.3
40
23.1
30
1.8
1.8
1.41
25.9
30
81.2
100
4.3
3.7
1.41
89.2
100
42.1
50
2.3
1.9
1.41
45.7
60
31.6
40
1.8
1.8
1.41
34.5
40
94.1
125
4.3
3.7
1.41
102.0
150
48.4
60
2.3
1.9
1.41
52.0
70
35.7
45
1.8
1.8
1.41
38.5
50
ICF
186
194
90
94
67
70
236
244
117
120
97
99
286
294
149
153
98
101
*Units are suitable for use on electrical systems where voltage supplied to the unit terminals is not below or above the listed limits.
†Fuse or HACR circuit breaker.
NOTES:
1. The MCA and MOCP values are calculated in accordance with the
National Electrical Code (NEC), Article 440.
2. Motor RLA and LRA values are established in accordance with
Underwriters’ Laboratories (UL), Standard 1995.
3. The 575-v units are UL, Canada-listed only.
—14—
PRE-START-UP
IMPORTANT: Before beginning Pre-Start-Up or Start-Up,
review Start-Up Checklist at the back of this book. The
Checklist assures proper start-up of a unit and provides a
record of unit condition, application requirements, system
information, and operation at initial start-up.
equalize readily, charge vapor on low side of system to assure
charge in the evaporator. Refer to GTAC II, Module 5, Charging, Recover, Recycling, and Reclamation for liquid charging
procedures.
CAUTION: Prior to starting compressor, refrigerant equal to operating charge must be added to avoid
possible compressor damage. See Tables 1A-1C.
CAUTION: Do not attempt to start the condensing
unit, even momentarily, until the following steps have
been completed. Compressor damage may result.
START-UP
I. SYSTEM CHECK
1. Check all air handler(s) and other equipment auxiliary components. Consult the manufacturer’s instructions regarding any other equipment connected to the
condensing unit. If unit has field-installed accessories, be sure all are properly installed and correctly
wired. If used, airflow switch must be properly
installed.
2. Backseat (open) compressor suction and discharge
valves. Now close valves one turn to allow refrigerant
pressure to reach test gages.
3. Open liquid line service valve.
4. Check tightness of all electrical connections.
5. For 576C, 566D units only, compressor oil level
should be visible in sight glass. Refer to Check Compressor Oil Level. Adjust the oil level as required.
Refer to Start-Up, Preliminary Oil Charge section.
No oil should be removed unless the crankcase heater
has been energized for at least 24 hours.
6. Be sure unit is properly leak checked, dehydrated,
and charged. See Preliminary Charge, this page.
7. Electrical power source must agree with nameplate
rating.
8. Crankcase heater must be firmly locked into compressor crankcase. Be sure crankcase is warm (heater
must be on for 24 hours before starting compressor).
9. Be sure compressor floats freely on the mounting
springs and that snubber washers can be moved with
finger pressure. See Compressor Mounting, page 9,
and Fig. 5 for loosening compressor bolts.
II. LEAK TEST AND DEHYDRATION
Leak test the entire refrigerant system using soap bubbles
and/or an electronic leak detector. Evacuate and dehydrate
entire refrigerant system.
III. TURN ON CRANKCASE HEATER
Turn on crankcase heater for 24 hours before starting the unit
to be sure all the refrigerant is out of the oil. To energize the
crankcase heater, proceed as follows:
1. Set the space thermostat set point above the space
temperature so there is no demand for cooling.
2. Close the field disconnect.
3. Turn the fan circuit breaker on. Leave the compressor circuit breakers off. The crankcase heater is now
energized.
IV. PRELIMINARY CHARGE
Before starting the unit, charge liquid refrigerant into the
high side of the system through the liquid service valve. The
amount of refrigerant added must be at least 80% of the
operating charge listed in the Physical Data table (Tables
1A-1C, pages 6-8). Allow high and low side pressures to
equalize before starting compressor. If pressures do not
I. 569D, 566E, 569F UNITS
Compressor crankcase heater must be on for 24 hours before
start-up. After the heater has been on for 24 hours, the unit
can be started. If no time has elapsed since the preliminary
charge step has been completed, it is unnecessary to wait the
24-hour period.
A. Preliminary Checks
1. Ensure that compressor service valves are backseated.
2. Verify that each compressor floats freely on its
mounting springs.
3. Check that electric power supply agrees with unit
nameplate data.
4. Verify that compressor crankcase heater is securely
in place.
5. Check that compressor crankcase heater has been on
at least 24 hours.
6. Recheck for leaks using same procedure as previously
outlined in Pre-Start-Up section, Leak Test and
Dehydration.
7. If any leaks are detected, evacuate and dehydrate as
previously outlined in Pre-Start-Up section, Leak
Test and Dehydration.
8. All internal wiring connections must be tight, and all
barriers and covers must be in place.
NOTE: The 569D, 566E, 569F units do not have a compressor
oil level sight glass. These units are factory changed with the
required amount of oil. If recharging is required, use Zerol
150 for the 569F, 569D072, and 569D090. Use Replacement
Components Division Oil (P/N P903-0101) for the 569D120
and 566E150-240.
B. Compressor Rotation
On 3-phase units with scroll compressors, it is important to
be certain compressor is rotating in the proper direction. To
determine whether or not compressor is rotating in the
proper direction:
1. Connect service gages to suction and discharge pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge
pressure does not rise to normal levels:
1. Note that the condenser fan is probably also rotating
in the wrong direction.
2. Turn off power to the unit, tag disconnect.
3. Reverse any two of the unit power leads.
4. Reapply power to the compressor, verify correct
pressures.
The suction and discharge pressure levels should now move
to their normal start-up levels.
—15—
C. Compressor Overload
This overload interrupts power to the compressor when
either the current or internal motor winding temperature
becomes excessive, and automatically resets when the internal temperature drops to a safe level. This overload may
require up to 60 minutes (or longer) to reset. If the internal
overload is suspected of being open, disconnect the electrical
power to the unit and check the circuit through the overload
with an ohmmeter or continuity tester.
D. Advanced Scroll Temperature Protection (ASTP)
Recommended Cooling Time
(Minutes)
Advanced Scroll Temperature Protection (ASTP) is a form of
internal discharge temperature protection that unloads the
scroll compressor when the internal temperature reaches
approximately 300 F. At this temperature, an internal bimetal disk valve opens and causes the scroll elements to separate, which stops compression. Suction and discharge pressures balance while the motor continues to run. The longer
the compressor runs unloaded, the longer it must cool before
the bi-metal disk resets. See Fig. 12.
To manually reset ASTP, the compressor should be stopped
and allowed to cool. If the compressor is not stopped, the
motor will run until the motor protector trips, which occurs
up to 90 minutes later. Advanced Scroll Temperature Protection will reset automatically before the motor protector
resets, which may take up to 2 hours. A label located above
the terminal box identifies Copeland Scroll compressor
models (ZR94, 108 and 125) that contain this technology. See
Fig. 13.
120
110
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
Compressor Unloaded Run Time (Minutes)
*Times are approximate.
NOTE: Various factors, including high humidity, high ambient temperature, and the presence of a sound blanket will increase cool-down
times.
Fig. 12 — Recommended Minimum Cool-Down Time After
Compressor is Stopped*
E. Compressor Lockout Device
The compressor lockout (CLO) device prevents the compressor from starting or running in a high pressure, loss-ofcharge or freeze-stat open situation. Reset the CLO device by
setting the thermostat to eliminate cooling demand and
return it to the original set point. If the system shuts down
again for the same fault, determine the possible cause before
attempting to reset the CLO device.
F. Start Unit
The field disconnect is closed, the fan circuit breaker is
closed, and the space thermostat is set above ambient so that
there is no demand for cooling. Only the crankcase heater
will be energized.
Next, reset space thermostat below ambient so that a call for
cooling is ensured.
NOTE: Do not use circuit breaker to start and stop the compressor except in an emergency.
CAUTION: Never charge liquid into the low-pressure
side of system. Do not overcharge. During charging or
removal of refrigerant, be sure indoor-fan system is
operating.
G. Adjust Refrigerant Charge
Unit must be charged in Cooling mode only. Refer to Cooling
Charging Charts, Fig. 14-18 and to Table 7 for maximum
charge level. Do not exceed maximum refrigerant charge. For
applications with line lengths greater than 100 ft, contact
Bryant representative. Vary refrigerant until the conditions
of the chart are met. Note that charging charts are different
from type normally used. Charts are based on charging the
units to the correct subcooling for the various operating conditions. Accurate pressure gage and temperature sensing
device are required. Connect the pressure gage to the service
port on the liquid line service valve. Mount the temperature
sensing device on the liquid line, close to the liquid line service valve and insulate it so that outdoor ambient temperature does not affect the reading. Indoor airflow must be
within the normal operating range of the unit. Operate unit
a minimum of 15 minutes. Ensure pressure and temperature
readings have stabilized. Plot liquid pressure and temperature on chart and add or reduce charge to meet curve. Adjust
charge to conform with charging chart, using the liquid pressure and temperature to read chart.
If the liquid line sight glass is cloudy, check refrigerant charge
again. Ensure all fans are operating. Also ensure maximum
allowable liquid lift has not been exceeded. If charged per
chart and if the sight glass is still cloudy, check for a plugged
filter drier or a partially closed solenoid valve. Replace or
repair, as needed.
Fig. 13 — Advanced Scroll Temperature Protection Label
—16—
140
54
130
49
43
38
32
27
21
LIQUID TEMPERATURE AT LIQUID VALVE (F)
LIQUID TEMPERATURE AT LIQUID VALVE (C)
60
ADD CHARGE IF ABOVE CURVE
120
110
100
90
80
70
REDUCE CHARGE IF BELOW CURVE
16
60
10
50
50
100
344
689
150
200
250
300
LIQUID PRESSURE AT LIQUID VALVE (PSIG)
1034
2069
1379
1724
LIQUID PRESSURE AT LIQUID VALVE (Kilopascals)
350
2414
Fig. 14 — 569D072-120, 569F120, 576C090-120 Charging Chart
Fig. 15 — 566D150 Charging Chart
—17—
400
Fig. 16 — 566D180 Charging Chart
Fig. 17 — 566D240 Charging Chart
—18—
160.00
150.00
60
140.00
LIQUID TEMPERATURE AT LIQUID VALVE (F)
LIQUID TEMPERATURE AT LIQUID VALVE (C)
71
66
64
49
43
38
32
27
21
16
10
4
-1
-7
BOTH OUTDOOR FANS MUST BE OPERATING
130.00
120.00
110.00
ADD CHARGE IF ABOVE CURVE
556E240
100.00
90.00
566E180
80.00
70.00
566E150
60.00
50.00
REDUCE CHARGE IF BELOW CURVE
40.00
30.00
20.00
10.00
-12
0.00
100
150
690
1030
200
250
300
350
LIQUID PRESSURE AT LIQUID VALVE (psig)
1720
1379
2069
2410
400
450
500
2758
3100
3448
LIQUID PRESSURE AT LIQUID VALVE (kPa)
Fig. 18 — 566E150-240 Charging Chart
5. Check that compressor crankcase heater has been on
at least 24 hours.
6. Note that compressor oil level is visible in the sight
glass.
7. Recheck for leaks using same procedure as previously
outlined in Pre-Start-Up section, Leak Test and
Dehydration.
8. If any leaks are detected, evacuate and dehydrate as
previously outlined in Pre-Start-Up section, Leak
Test and Dehydration.
H. Final Checks
Ensure all safety controls are operating, control panel covers
are on, and the service panels are in place.
Table 7 — Maximum Refrigerant Charge
UNIT
569D
576C
569F
566D
566E
072
090
120
090
102
120
120
150
180
240
150
180
240
R-22 (lb)
17.3
34.2
34.2
34.2
9. All internal wiring connections must be tight, and all
barriers and covers must be in place.
(2) 17.1
40.3
39.8
39.8
B. Preliminary Oil Charge
Compressor is factory charged with oil (see Tables 1A-1C).
When oil is checked at start-up, it may be necessary to add or
remove oil to bring it to the proper level. One recommended
oil level adjustment method follows:
48.0
NOTE: 569F120 has 2 charges, one per circuit.
II. 576C, 566D UNITS
Compressor crankcase heater must be on for 24 hours before
start-up. After the heater has been on for 24 hours, the unit
can be started. If no time has elapsed since the preliminary
charge step has been completed, it is unnecessary to wait the
24-hour period.
A. Preliminary Checks
1. Ensure that compressor service valves are backseated.
2. Verify that each compressor floats freely on its
mounting springs.
3. Check that electric power supply agrees with unit
nameplate data.
4. Verify that compressor crankcase heater is securely
in place.
Add Oil
Close suction service valve and pump down crankcase to
2 psig. (Low-pressure switch must be jumpered.) Wait a few
minutes and repeat until pressure remains steady at 2 psig.
Remove oil fill plug above the oil level sight glass, add oil
through plug hole, and replace plug. Run compressor for
20 minutes and check oil level. See Fig. 19.
NOTE: Use only Bryant approved compressor oil. Approved
sources are:
Petroleum Specialties Inc. . . . . . . . . . . . . . . . . . . . Cryol 150A
Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Capella WF-32
Witco Chemical Co. . . . . . . . . . . . . . . . . . . . . . . . . Suniso 3GS
Do not use oil that has been drained out, or oil that has been
exposed to atmosphere.
Remove Oil
Pump down compressor to 2 psig. Loosen the 1/4-in. pipe plug
at the compressor base and allow the oil to seep out past the
threads of the plug.
—19—
NOTE: The crankcase will be slightly pressurized. Do not
remove the plug, or the entire oil charge will be lost.
Small amounts of oil can be removed through the oil pump
discharge connection while the compressor is running.
C. Start Unit
The field disconnect is closed, the fan circuit breaker is
closed, and the space thermostat is set above ambient so that
there is no demand for cooling. Only the crankcase heater
will be energized.
Next, close the compressor circuit breaker and then reset
space thermostat below ambient so that a call for cooling is
ensured.
stops. The unloader is now at 0 psig set point. If electric actuated unloaders are installed, energize the solenoid to unload
the compressor.
Return unloader to original setting after checks are complete.
F. Final Checks
Ensure all safety controls are operating, control panel covers
are on, and the service panels are in place.
NOTE: Do not use circuit breaker to start and stop the compressor except in an emergency.
After starting, there is a delay of at least 3 seconds before
compressor starts.
566D240
(06E COMPRESSOR)
CAUTION: Never charge liquid into the low-pressure side of system. Do not overcharge. During charging or removal of refrigerant, be sure indoor-fan
system is operating.
566D150,180 AND
576C090-120
(06D COMPRESSOR)
Fig. 19 — Operating Oil Levels
D. Adjust Refrigerant Charge
Unit must be charged in Cooling mode only. Refer to Cooling
Charging Charts, Fig. 14-18 and to Table 7 for maximum
charge level. Vary refrigerant until the conditions of the
chart are met. Note that charging charts are different from
type normally used. Charts are based on charging the units
to the correct subcooling for the various operating conditions.
Accurate pressure gage and temperature sensing device are
required. Connect the pressure gage to the service port on
the liquid line service valve. Mount the temperature sensing
device on the liquid line, close to the liquid line service valve
and insulate it so that outdoor ambient temperature does not
affect the reading. Indoor airflow must be within the normal
operating range of the unit. Operate unit a minimum of
15 minutes. Ensure pressure and temperature readings have
stabilized. Plot liquid pressure and temperature on chart
and add or reduce charge to meet curve. Adjust charge to
conform with charging chart, using the liquid pressure and
temperature to read chart.
If the sight glass is cloudy, check refrigerant charge again.
Ensure all fans are operating. Also ensure maximum allowable liquid lift has not been exceeded. If charged per chart
and if the sight glass is still cloudy, check for a plugged filter
drier or a partially closed solenoid valve. Replace or repair,
as needed.
E. Check Compressor Oil Level
After adjusting the refrigerant charge, allow the compressor
to run fully loaded for 20 minutes. Running oil level should
be within view of the crankcase sight glass. Stop the compressor at the field power supply disconnect and check the
crankcase oil level. Add oil only if necessary to bring the oil
into view in the sight glass. If oil is added, run the compressor for an additional 10 minutes, then stop and check oil
level. If the level remains low, check the piping system for
proper design for oil return; also, check the system for leaks.
If the initial check shows too much oil (too high in the sight
glass) remove oil to proper level. See Preliminary Oil
Charge, this page, for proper procedure for adding and
removing oil. See Fig. 19.
When the above checks are complete, repeat the procedure
with the unit operating at minimum load conditions.
Unload the compressor by turning the control set point
adjustment nut counterclockwise until the adjustment nut
OPERATING SEQUENCE
I. COOLING
A. 569D072-120, 576C090-120 Cooling
At start-up, the thermostat calls for cooling. With all safety
devices satisfied, the compressor contactor and fan contactor
energize, causing the compressor and outdoor-fan motor to
operate. Contacts energize, allowing the field-supplied and
field-installed indoor-fan contactor to function. A fieldsupplied and field-installed liquid line valve also opens,
allowing the system to function in Cooling mode. As cooling
demand is satisfied, the thermostat contacts break, deenergizing the contactor and causing the system to shut off. The
liquid line solenoid valve closes, minimizing the potential for
refrigerant migration. The compressor does not restart until
the thermostat again calls for cooling. The system is protected with a safety circuit so that the system will not start if
a fault exists (i.e., high-pressure or discharge gas temperature [569D090 and 120 only] fault). To reset the safety circuit, set the thermostat to eliminate the cooling demand,
then return to original set point. This should be done only
once, and if system shuts down due to the same fault, determine the problem before attempting to restart the system.
B. 566D150-240 Cooling
When the first stage of cooling thermostat closes, the timer
starts. After approximately 3 seconds, the timer activates
the compressor and fan motor no. 1 contactors. When the liquid pressure builds to approximately 257 psig, fan motor
no. 2 is energized.
When there is demand for additional cooling capacity, the
second stage of the cooling thermostat closes, energizing a
field-supplied liquid line solenoid (LLS) valve, which opens.
This increases the suction pressure, causing the compressor
to operate at higher capacity (compressor loads).
When the fan switch is set at AUTO, the indoor-air fan cycles
with the compressor. When the switch is set at CONT, the
indoor-air fan runs continuously.
At shutdown, the Time Guard II timer prevents the compressor from restarting for approximately 5 minutes.
In addition, an LLS valve wired in parallel with the compressor contactor coil shuts off the liquid line to prevent
—20—
refrigerant migration back to the compressor during the off
cycle.
C. 569F120 Cooling
When the thermostat calls for stage one cooling at start-up,
and all safety devices are satisfied, the compressor contactor
no. 1 (C1) energizes causing compressor no. 1 and outdoorfan motor no. 1 to start (the indoor-fan contactor should be
wired to start at the same time as the compressor). The liquid line solenoid (LLS) valve will open when compressor
no. 1 starts, allowing refrigerant to flow in the system.
When the thermostat calls for stage two cooling, compressor
contactor no. 2 (C2) energizes causing compressor no. 2 and
outdoor-fan motor no. 2 to start. As the cooling demand
decreases, stage two on the thermostat opens, causing compressor no. 2 and outdoor-fan motor no. 2 to shut down. As
the cooling continues to decrease, stage one of the thermostat opens causing compressor no. 1 and outdoor-fan motor
no. 1 to shut down. The LLS valve for each compressor will
close when the associated compressor stops, minimizing the
potential for refrigerant migration during the off cycle.
The indoor-fan motor will stop if the thermostat is set to
AUTO and will continue to operate if the thermostat is set to
CONT. Each compressor is protected with a CLO device so
that the compressor will not operate if there is a highpressure fault, low pressure fault, or a compressor is off due
to internal line break overcurrent/over temperature protection. To reset the CLO device, set the thermostat higher to
remove the cooling demand, then return to the original set
point. This should be done only once. If the system shuts
down with the same fault, the cause for the fault should be
determined and corrected before the a CLO device is reset
again.
D. 566E150-240 Cooling
At start-up, when the thermostat calls for first stage cooling
and all safety devices are satisfied, the compressor contactor
(C1) energizes causing compressor no. 1 and fan motor no. 1
to start. Fan motor no. 2 will start when the fan cycling pressure switch (FCPS) closes as discharge pressure builds. With
the indoor-fan contactor wired to TB2-4 and TB2-9 contacts
on the terminal block, the indoor-fan will also start with the
compressor. The liquid line solenoid (LLS) valve will open
when compressor no. 1 starts, allowing refrigerant to flow in
the system.
II. HEATING
The heating thermostat (TH) energizes a field-supplied relay
which operates heating controls and energizes the indoor
unit relay. When the fan switch is set at AUTO, the indoor
unit fan cycles with the heating control. The indoor unit fan
runs continuously when the fan switch is set at ON.
Causes of complete unit shutdown are: interruption of
supplied power, open compressor internal protector (IP),
open control circuit breaker, or an open high-pressure or
low-pressure safety switch.
SERVICE
I. CAPACITY CONTROL (576C, 566D UNITS)
A suction pressure-actuated unloader controls 2 cylinders
and provides capacity control. Unloaders are factory set (see
Tables 1A-1C), but can be field adjusted as described in the
next paragraphs.
Control set point (cylinder load point) is adjustable from 0 to
85 psig (586 kPa). To adjust, turn control set point
adjustment nut (Fig. 20) clockwise to its bottom stop. In this
position, set point is 85 psig. Next, turn adjustment counterclockwise to desired control set point. Every full turn
counterclockwise decreases set point by 7.5 psig.
Pressure differential (difference between cylinder load and
unload points) is adjustable from 6 to 22 psig. To adjust, turn
pressure differential adjustment screw (Fig. 20) counterclockwise to its back stop position. In this position, differential is
6 psig. Next, turn adjustment clockwise to desired pressure
differential setting. Every full turn clockwise increases differential by 1.5 psig.
II. HEAD PRESSURE CONTROL (566D, 566E150-240 UNITS
ONLY)
Fan cycling is a standard feature. The no. 2 fan cycles in
response to changes in liquid pressure. The switch cycles the
fan off at 160 ± 10 psig as pressure decreases, and cycles it
back on at 255 ± 10 psig.
When the thermostat calls for stage two cooling, compressor
contactor no. 2 (C2) energizes causing compressor no. 2 to
start. As the cooling demand decreases, stage two on the
thermostat opens, causing compressor no. 2 to shut down. As
the cooling continues to decrease, stage one of the thermostat opens causing compressor no. 1 and outdoor-fan motor
to shut down. The LLS valve for each compressor will close
when the associated compressor stops, minimizing the
potential for refrigerant migration during the off cycle.
The indoor-fan motor will stop if the thermostat is set to
AUTO and will continue to operate if the thermostat is set on
CONT. Each compressor is controlled by the thermostat so
they will not start until there is a demand from the thermostat. Each compressor is protected with a CLO device so that
the compressor will not operate if there is a high-pressure
fault, low-pressure fault, or compressor is off due to internal
line break overcurrent/overtemperature protection. To reset
the a CLO device, set the thermostat higher to remove the
cooling demand, then return to the original set point. This
should be done only once. If the system shuts down with the
same fault, the cause for the fault should be determined and
corrected before the a CLO device is reset again.
—21—
Fig. 20 — Compressor Capacity Control Unloader
III. TIME GUARD II CIRCUIT (566D ONLY)
Circuit prevents short-cycling by providing a delay of
approximately 5 minutes before restarting compressor after
shutdown from safety device action.
On start-up, the Time Guard II timer causes a delay of
approximately 3 seconds after thermostat closes.
On compressor shutdown, the timer recycles for approximately 5 minutes. During this time, the compressor cannot
restart.
Refer to Fig. 21 and to label diagram on unit.
VII. HIGH-PRESSURE SWITCHES
The 569D, 576C and 569F high-pressure switches are
mounted on the liquid line. The 566E150-240 high-pressure
switches are mounted on the discharge line. The 566D
high-pressure switches are mounted on the compressor. The
switches are all fixed, non-adjustable type.
A. To Check
Slowly close liquid shutoff valve and allow compressor to
pump down. Do not allow compressor pumpdown below
2 psig. Compressor should shut down when suction pressure
drops to cutout pressure in Tables 1A-1C, and should restart
when pressure builds up to cut-in pressure shown.
VIII. DISCHARGE GAS THERMOSTAT (569D090 ONLY)
A sensor on the discharge line will stop the compressor if an
abnormally high discharge temperature is detected. If the
unit shuts down on a high discharge temperature fault,
restart the unit by cycling the thermostat or the power
disconnect switch.
Fig. 21 — Timer Sequence Chart
IV. CRANKCASE HEATER
The heater prevents refrigerant migration and compressor
oil dilution during shutdown whenever compressor is not
operating. It is wired to cycle with the compressor; the
heater is off when compressor is running, and on when compressor is off.
Both compressor service valves must be closed whenever the
crankcase heater is deenergized for more than 6 hours.
The crankcase heater is operable as long as the control circuit is energized.
V. COMPRESSOR PROTECTION
A. Circuit Breaker (566D Only)
Calibrated trip manual reset, ambient compensated, magnetic breaker protects against motor overload and locked
rotor conditions.
B. Compressor Overtemperature Protection (IP)
A thermostat installed on compressor motor winding reacts
to excessively high winding temperatures and shuts off the
compressor.
C. Time Guard II Control (566D Only)
Control prevents compressor from short cycling. See Operating Sequence.
D. Crankcase Heater
Heater minimizes absorption of liquid refrigerant by oil in
crankcase during brief or extended shutdown periods. The
control circuit is maintained if compressor fan motor circuit
breakers are turned off. The main disconnect must be on to
energize crankcase heater.
IMPORTANT: Never open any switch or disconnect that energizes the crankcase heater unless unit is being serviced or is
to be shut down for a prolonged period. After a prolonged
shutdown on a service job, energize the crankcase heater for
24 hours before starting the compressor.
E. Advanced Scroll Temperature Protection (ASTP)
See Advanced Scroll Temperature Protection (ASTP) on
page 16.
IX. OUTDOOR FANS
Each fan is supported by a formed-wire mount bolted to the
fan deck and covered with a wire guard. Fan motors have permanently lubricated bearings.
NOTE: On 566D units, the exposed end of the motor shaft is
covered with a rubber boot. In case a fan motor must be
repaired or replaced, be sure the rubber boot is put back on
when the fan is reinstalled and be sure the fan guard is in
place before starting the unit. Figure 22 shows the proper
position of the mounted fan.
X. LUBRICATION
Fan motors have sealed bearings. No provisions are made for
lubrication.
Compressor has its own oil supply. Loss of oil due to a leak in
the system should be the only reason for adding oil after the
system has been in operation.
XI. COIL CLEANING AND MAINTENANCE
This section discusses the cleaning and the maintenance of
standard coils and E-Coated coils. Routine cleaning of coil
surfaces is essential to minimize contamination build-up and
remove harmful residue. Inspect coils monthly and clean as
required.
A. Cleaning Standard Coils
Standard coils can be cleaned with a vacuum cleaner,
washed out with low velocity water, blown out with low-pressure compressed air, or brushed (do not use wire brush). Fan
motors are drip-proof but not waterproof. Do NOT use acid
cleaners.
Clean outdoor coil annually or as required by location or outdoor air conditions. Inspect coil monthly, and clean as
required. Fins are not continuous through coil sections; dirt
and debris may pass through first section, become trapped
between second and third rows of fins and restrict outdoor
airflow. Use a flashlight to determine if dirt or debris has
collected between coil sections. Clean coil as follows:
VI. LOW-PRESSURE SWITCHES
The 569D, 569F, 566E, 576C low-pressure switches are
mounted on the suction line. The 566D low-pressure
switches are mounted on the compressor. Switches are all
fixed, non-adjustable type.
—22—
1. Turn off unit power.
2. Remove screws holding rear corner posts and top
cover in place. Pivot top cover up 12 to 18 in. and
support with a rigid support. See Fig. 23.
3. Remove clips securing tube sheets together at the
return bend end of the coil. Carefully spread the ends
of the coil rows apart by moving the outer sections.
See Fig. 24.
4. Using a water hose, or other suitable equipment,
flush down between the sections of coil to remove dirt
and debris.
5. Clean the remaining surfaces in the normal manner.
6. Reposition outer coil sections.
7. Reinstall clips which secure tube sheets.
8. Replace top cover and rear corner posts.
B. Cleaning and Maintaining E-Coated Coils
Fig. 22 — Outdoor Fan — 566D Units
Routine cleaning of condenser coil surfaces is essential to
maintain proper operation of the unit. Elimination of contamination and removal of harmful residue will greatly
increase the life of the coil and extend the life of the unit.
The following maintenance and cleaning procedures are recommended as part of the routine maintenance activities to
extend the life of the coil.
Remove Surface Loaded Fibers
Debris such as dirt and fibers on the surface of the coil
should be removed with a vacuum cleaner. If a vacuum
cleaner is not available, a soft brush may be used. The cleaning tool should be applied in the direction of the fins. Coil
surfaces can be easily damaged (fin edges bent over) if the
tool is applied across the fins.
NOTE: Use of a water stream, such as a garden hose, against
a surface loaded coil will drive the fibers and dirt into the
coil. This will make cleaning efforts more difficult. Surface
debris must be completely removed prior to using a low
velocity clean water rinse.
Periodic Clean Water Rinse
A periodic clean water rinse is very beneficial for coils that
are applied in coastal or industrial environments. However,
it is very important that the water rinse is made with very
low velocity water stream to avoid damaging the fin edges.
Monthly cleaning is recommended.
Routine Cleaning of E-Coated Coil Surfaces
Fig. 23 — Pivot and Support Top Cover
Monthly cleaning with Environmentally Sound Coil Cleaner
is essential to extend the life of coils. It is recommended that
all coils including standard aluminum, pre-coated, copper/
copper, or E-coated coils be cleaned with the Environmentally Sound Coil Cleaner as described below. Coil cleaning
should be part of the regularly scheduled maintenance procedures of the unit to ensure long life of the coil. Failure to
clean the coils may result in reduced durability in the
environment.
Environmentally Sound Coil Cleaner is non-bacterial,
biodegradable and will not harm the coil or surrounding
components such as electrical wiring, painted metal surfaces
or insulation. Use of non-recommended coil cleaners is
strongly discouraged since coil and unit durability could be
affected.
The following field-supplied equipment is required for coil
cleaning:
• 21/2 gallon garden sprayer
• water rinse with low velocity spray nozzle
Environmentally Sound Coil Cleaner Application Instructions
Fig. 24 — Coil Cleaning (Typical)
Perform the following procedure to clean the coil.
NOTE: Wear proper eye protection such as safety glasses
during mixing and application.
1. Remove all surface debris and dirt from the coil with
a vacuum cleaner.
2. Thoroughly wet finned surfaced with clean water and
a low velocity garden hose, being careful not to bend
fins.
—23—
3. Mix Environmentally Sound Coil Cleaner in a 21/2 gallon garden sprayer according to the instructions
included with the Cleaner. The optimum solution temperature is 100 F.
5. Allow finned surfaces to remain wet with cleaning
solution for 10 minutes. Ensure surfaces are not
allowed to dry before rinsing. Reapply cleaner as
needed to ensure 10-minute saturation is achieved.
6. Thoroughly rinse all surfaces with low velocity clean
water using downward rinsing motion of water spray
nozzle. Protect fins from damage from the spray
nozzle.
CAUTION: DO NOT USE water in excess of 130 F.
Enzymes in coil cleaner will be destroyed and coil
cleaner will not be effective.
4. Thoroughly apply Environmentally Sound Coil
Cleaner solution to all coil surfaces including finned
area, tube sheets, and coil headers. Hold garden
sprayer nozzle close to finned areas and apply cleaner
with a vertical, up-and-down motion. Avoid spraying
in horizontal pattern to minimize potential for fin
damage. Ensure cleaner thoroughly penetrates deep
into finned areas. Interior and exterior finned areas
must be thoroughly cleaned.
—24—
CAUTION: Do not use bleach, harsh chemicals, or
acid cleaners on outdoor or indoor coils of any kind.
These types of cleaners are difficult to rinse, and they
promote rapid corrosion of the fin collar-copper tube
connection. Only use the Environmentally Sound Coil
Cleaner.
Never use high pressure air or liquids to clean coils.
High pressures damage coils and increase the airside
pressure drop. To promote unit integrity, follow cleaning and maintenance procedures in this document.
TROUBLESHOOTING
PROBLEM
COMPRESSOR DOES NOT RUN
Contactor Open
1. Power off.
2. Fuses blown in field power circuit.
3. No control power.
4. Thermostat circuit open.
5. Time Guard II device not operating (566D only).
6. Compressor circuit breaker tripped (566D only).
SOLUTION
1.
2.
3.
4.
5.
6.
7. Safety device lockout circuit active.
8. Low-pressure switch open.
7.
8.
9. High-pressure switch open.
9.
10. Compressor overtemperature switch open.
11. Loose electrical connections.
12. Compressor stuck.
Contactor Closed
1. Compressor leads loose.
2. Motor windings open.
3. Single phasing.
COMPRESSOR STOPS ON HIGH-PRESSURE SWITCH
Outdoor Fan On
1. High-pressure switch faulty.
2. Reversed fan rotation.
3. Airflow restricted.
4. Air recirculating.
5. Noncondensables in system.
6. Refrigerant overcharge.
7. Line voltage incorrect.
8. Refrigerant system restrictions.
Outdoor Fan Off
1. Fan slips on shaft.
2. Motor not running.
3. Motor bearings stuck.
4. Motor overload open.
5. Motor burned out.
COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH
Indoor-Air Fan Running
1. Compressor suction service valve partially closed.
2. Liquid line solenoid valve(s) fails to open.
3. Filter drier plugged.
4. Expansion valve power head defective.
5. Low refrigerant charge.
10.
11.
12.
Restore power.
After finding cause and correcting, replace with correct size fuse.
Check control circuit breaker; reset if tripped or replace if defective.
Check thermostat setting.
Check Time Guard II device.
Check for excessive compressor current draw. Reset breaker;
replace if defective.
Reset lockout circuit at thermostat or circuit breaker.
Check for refrigerant undercharge, obstruction of indoor airflow, or
whether compressor suction shutoff valve is fully open. Make sure
liquid line solenoid valve(s) is open.
Check for refrigerant overcharge, obstruction of outdoor airflow, air in
system, or whether compressor discharge valve is fully open. Be
sure outdoor fans are operating correctly.
Check for open condition. Allow for reset. Replace if defective.
Tighten all connections.
See compressor service literature.
1. Check connections.
2. See compressor service literature.
3. Check for blown fuse. Check for loose connection at compressor
terminal.
1.
2.
3.
4.
5.
6.
7.
8.
Replace switch.
Confirm rotation, correct if necessary.
Remove obstruction.
Clear airflow area.
Recover refrigerant and recharge as required.
Recover refrigerant as required.
Consult power company.
Check or replace filter drier, expansion valve, etc. Check that compressor discharge service valve is fully open.
1.
2.
3.
4.
5.
Tighten fan hub setscrews.
Check power and capacitor.
Replace bearings.
Check overload rating. Check for fan blade obstruction.
Replace motor.
1. Open valve fully.
2. Check liquid line solenoid valve(s) for proper operation. Replace if
necessary.
3. Replace filter drier.
4. Replace power head.
5. Add charge. Check low-pressure switch setting.
—25—
TROUBLESHOOTING (cont)
PROBLEM
COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH (cont)
Airflow Restricted
1. Coil iced up.
2. Coil dirty.
3. Air filters dirty.
4. Dampers closed.
Indoor-Air Fan Stopped
1. Electrical connections loose.
2. Fan relay defective.
3. Motor overload open.
4. Motor defective.
5. Fan belt broken or slipping.
COMPRESSOR RUNNING BUT COOLING INSUFFICIENT
Suction Pressure Low
1. Refrigerant charge low.
2. Head pressure low.
3. Air filters dirty.
4. Expansion valve power head defective.
5. Indoor coil partially iced.
6. Indoor airflow restricted.
Suction Pressure High
1. Unloaders not functioning.
2. Compressor valve defective.
3. Heat load excessive.
UNIT OPERATES TOO LONG OR CONTINUOUSLY
1. Low refrigerant charge.
2. Control contacts fused.
3. Air in system.
4. Partially plugged expansion valve or filter drier.
SYSTEM IS NOISY
1. Piping vibration.
2. Compressor noisy.
COMPRESSOR LOSES OIL
1. Leak in system.
2. Crankcase heaters not energized during shutdown.
3. Improper interconnecting piping design.
FROSTED SUCTION LINE
Expansion valve admitting excess refrigerant.
HOT LIQUID LINE
1. Shortage of refrigerant due to leak.
2. Expansion valve opens too wide.
FROSTED LIQUID LINE
1. Restricted filter drier.
2. Liquid line solenoid valve partially closed.
COMPRESSOR WILL NOT UNLOAD
1. Defective unloader.
2. Defective capacity control solenoid valve (if used).
3. Miswired capacity control liquid line solenoid (if used).
4. Weak, broken, or wrong valve body spring.
COMPRESSOR WILL NOT LOAD
1. Miswired capacity control liquid line solenoid (if used).
2. Defective capacity control solenoid valve (if used).
3. Plugged strainer (high side).
4. Stuck or damaged unloader piston or piston ring(s).
Copyright 2004 Bryant Heating & Cooling Systems
SOLUTION
1.
2.
3.
4.
Check refrigerant charge.
Clean coil fins.
Clean or replace filters.
Check damper operation and position.
1.
2.
3.
4.
5.
Tighten all connections.
Replace relay.
Power supply.
Replace motor.
Replace or tighten belt.
1.
2.
3.
4.
5.
6.
Add refrigerant.
Check refrigerant charge. Check outdoor-air fan thermostat settings.
Clean or replace filters.
Replace power head.
Check low-pressure setting.
Remove obstruction.
1. Check unloader adjustments. Check unloader setting.
2. See compressor service literature.
3. Check for open doors or windows in vicinity of fan coil.
1.
2.
3.
4.
Add refrigerant.
Replace control.
Purge and evacuate system.
Clean or replace.
1. Support piping as required.
2. Check valve plates for valve noise. Replace compressor if bearings
are worn.
1. Repair leak.
2. Check wiring and relays. Check heater and replace if defective.
3. Check piping for oil return. Replace if necessary.
Adjust expansion valve.
1. Repair leak and recharge.
2. Adjust expansion valve.
1. Remove restriction or replace.
2. Replace valve.
1.
2.
3.
4.
Replace unloader.
Replace valve.
Rewire correctly.
Replace spring.
1.
2.
3.
4.
Rewire correctly.
Replace valve.
Clean or replace strainer.
Clean or replace the necessary parts.
Printed in U.S.A.
CATALOG NO. 5356-911
START-UP CHECKLIST
I. PRELIMINARY INFORMATION
OUTDOOR: MODEL NO.
SERIAL NO.
INDOOR: AIR HANDLER MANUFACTURER
MODEL NO.
SERIAL NO.
ADDITIONAL ACCESSORIES
II. PRE-START-UP
OUTDOOR UNIT
IS THERE ANY SHIPPING DAMAGE?
(Y/N)
IF SO, WHERE:
WILL THIS DAMAGE PREVENT UNIT START-UP?
(Y/N)
CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT?
HAS THE GROUND WIRE BEEN CONNECTED?
(Y/N)
(Y/N)
HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY?
(Y/N)
ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY?
(Y/N)
HAVE COMPRESSOR HOLDDOWN BOLTS BEEN LOOSENED (Snubber washers are snug, but not tight)?
(Y/N)
CONTROLS
ARE THERMOSTAT AND INDOOR FAN CONTROL WIRING CONNECTIONS MADE AND CHECKED?
(Y/N)
ARE ALL WIRING TERMINALS (including main power supply) TIGHT?
(Y/N)
HAS CRANKCASE HEATER BEEN ENERGIZED FOR 24 HOURS?
(Y/N)
INDOOR UNIT
HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE?
ARE PROPER AIR FILTERS IN PLACE?
(Y/N)
(Y/N)
HAVE FAN AND MOTOR PULLEYS BEEN CHECKED FOR PROPER ALIGNMENT?
DO THE FAN BELTS HAVE PROPER TENSION?
(Y/N)
(Y/N)
HAS CORRECT FAN ROTATION BEEN CONFIRMED?
(Y/N)
PIPING
ARE LIQUID LINE SOLENOID VALVES LOCATED AT THE INDOOR COILS AS REQUIRED?
(Y/N)
HAVE LEAK CHECKS BEEN MADE AT COMPRESSOR, OUTDOOR AND INDOOR COILS,
TXVs (Thermostatic Expansion Valves), SOLENOID VALVES, FILTER DRIERS, AND FUSIBLE PLUGS
WITH A LEAK DETECTOR?
(Y/N)
LOCATE, REPAIR, AND REPORT ANY LEAKS.
HAVE ALL COMPRESSOR SERVICE VALVES BEEN FULLY OPENED (BACKSEATED)?
HAVE LIQUID LINE SERVICE VALVES BEEN OPENED?
(Y/N)
(Y/N)
IS THE OIL LEVEL IN EACH COMPRESSOR CRANKCASE VISIBLE IN THE COMPRESSOR SIGHT GLASSES
(576C/566D Units Only)?
(Y/N)
CHECK VOLTAGE IMBALANCE
LINE-TO-LINE VOLTS:
AB
V
AC
(AB + AC + BC)/3 = AVERAGE VOLTAGE =
V
BC
V
MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =
V
VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) =
IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM!
CALL LOCAL POWER COMPANY FOR ASSISTANCE.
CL-1
V
III. START-UP
CHECK INDOOR UNIT FAN SPEED AND RECORD.
CHECK OUTDOOR UNIT FAN SPEED AND RECORD.
OIL PRESSURE
SUCTION PRESSURE
SUCTION LINE TEMP
DISCHARGE PRESSURE
DISCHARGE LINE TEMP
ENTERING OUTDOOR UNIT AIR TEMP
LEAVING OUTDOOR UNIT AIR TEMP
INDOOR UNIT ENTERING-AIR DB (dry bulb) TEMP
INDOOR UNIT ENTERING-AIR WB (wet bulb) TEMP
INDOOR UNIT LEAVING-AIR DB TEMP
INDOOR UNIT LEAVING-AIR WB TEMP
COMPRESSOR AMPS (L1/L2/L3)
/
/
CHECK COMPRESSOR ROTATION (Scroll compressors only); IS COMPRESSOR ROTATING
IN PROPER DIRECTION?
(Y/N)
CHECK THE COMPRESSOR OIL LEVEL SIGHT GLASSES; ARE THE SIGHT GLASSES SHOWING
OIL LEVEL IN VIEW (576C/566D Units Only)?
(Y/N)
CUT ALONG DOTTED LINE
AFTER AT LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:
CUT ALONG DOTTED LINE
NOTES:
Copyright 2004 Bryant Heating & Cooling Systems
Printed in U.S.A.
CL-2
CATALOG NO. 5356-911